1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>

	Clean up linux emulation code to make it architecture-independent
	as much as possible.

	* linux: Renamed from linuxdev.
	* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
	(MAKE): New variable. Used for the linux.o target.
	* configure.in: Add AC_CHECK_TOOL(MAKE, make).
	* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
	OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
	* linux/src: Renamed from linux/linux.
	* linux/dev: Renamed from linux/mach.
	* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
	instead of mach/include/linux/autoconf.h.
	* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
	* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
	of <i386/ipl.h>.
	* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
	<i386/ipl.h> and <i386/pic.h>.
	* linux/dev/init/main.c: Many i386-dependent codes moved to ...
	* linux/dev/arch/i386/irq.c: ... here.
	* linux/dev/arch/i386/setup.c: New file.
	* linux/dev/arch/i386/linux_emul.h: Likewise.
	* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
	* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
	of <i386/ipl.h>, and moved to ...
	* linux/dev/kernel/sched.c: ... here.
	* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/blocl.c: ... here.
	* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/net.c: ... here.
	* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
	* linux/dev/glue/misc.c: ... here.
	* linux/dev/arch/i386/glue/kmem.c: Moved to ...
	* linux/dev/glue/kmem.c: ... here.

1 files changed, 10793 insertions, 0 deletions

diff --git a/linux/src/drivers/scsi/ncr53c8xx.c b/linux/src/drivers/scsi/ncr53c8xx.c
new file mode 100644
index 00000000..1be3d9fe
--- /dev/null
+++ b/linux/src/drivers/scsi/ncr53c8xx.c
@@ -0,0 +1,10793 @@
+/******************************************************************************
+**  Device driver for the PCI-SCSI NCR538XX controller family.
+**
+**  Copyright (C) 1994  Wolfgang Stanglmeier
+**
+**  This program is free software; you can redistribute it and/or modify
+**  it under the terms of the GNU General Public License as published by
+**  the Free Software Foundation; either version 2 of the License, or
+**  (at your option) any later version.
+**
+**  This program is distributed in the hope that it will be useful,
+**  but WITHOUT ANY WARRANTY; without even the implied warranty of
+**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**  GNU General Public License for more details.
+**
+**  You should have received a copy of the GNU General Public License
+**  along with this program; if not, write to the Free Software
+**  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+**
+**-----------------------------------------------------------------------------
+**
+**  This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
+**  and is currently maintained by
+**
+**          Gerard Roudier              <groudier@club-internet.fr>
+**
+**  Being given that this driver originates from the FreeBSD version, and
+**  in order to keep synergy on both, any suggested enhancements and corrections
+**  received on Linux are automatically a potential candidate for the FreeBSD 
+**  version.
+**
+**  The original driver has been written for 386bsd and FreeBSD by
+**          Wolfgang Stanglmeier        <wolf@cologne.de>
+**          Stefan Esser                <se@mi.Uni-Koeln.de>
+**
+**  And has been ported to NetBSD by
+**          Charles M. Hannum           <mycroft@gnu.ai.mit.edu>
+**
+**-----------------------------------------------------------------------------
+**
+**                     Brief history
+**
+**  December 10 1995 by Gerard Roudier:
+**     Initial port to Linux.
+**
+**  June 23 1996 by Gerard Roudier:
+**     Support for 64 bits architectures (Alpha).
+**
+**  November 30 1996 by Gerard Roudier:
+**     Support for Fast-20 scsi.
+**     Support for large DMA fifo and 128 dwords bursting.
+**
+**  February 27 1997 by Gerard Roudier:
+**     Support for Fast-40 scsi.
+**     Support for on-Board RAM.
+**
+**  May 3 1997 by Gerard Roudier:
+**     Full support for scsi scripts instructions pre-fetching.
+**
+**  May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
+**     Support for NvRAM detection and reading.
+**
+**  August 18 1997 by Cort <cort@cs.nmt.edu>:
+**     Support for Power/PC (Big Endian).
+**
+*******************************************************************************
+*/
+
+/*
+**	30 January 1998, version 2.5f.1
+**
+**	Supported SCSI-II features:
+**	    Synchronous negotiation
+**	    Wide negotiation        (depends on the NCR Chip)
+**	    Enable disconnection
+**	    Tagged command queuing
+**	    Parity checking
+**	    Etc...
+**
+**	Supported NCR chips:
+**		53C810		(8 bits, Fast SCSI-2, no rom BIOS) 
+**		53C815		(8 bits, Fast SCSI-2, on board rom BIOS)
+**		53C820		(Wide,   Fast SCSI-2, no rom BIOS)
+**		53C825		(Wide,   Fast SCSI-2, on board rom BIOS)
+**		53C860		(8 bits, Fast 20,     no rom BIOS)
+**		53C875		(Wide,   Fast 20,     on board rom BIOS)
+**		53C895		(Wide,   Fast 40,     on board rom BIOS)
+**
+**	Other features:
+**		Memory mapped IO (linux-1.3.X and above only)
+**		Module
+**		Shared IRQ (since linux-1.3.72)
+*/
+
+#define SCSI_NCR_DEBUG_FLAGS	(0)		
+
+#define NCR_GETCC_WITHMSG
+
+/*==========================================================
+**
+**      Include files
+**
+**==========================================================
+*/
+
+#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <linux/delay.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/bios32.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#include <linux/stat.h>
+
+#include <linux/version.h>
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+#include <linux/blk.h>
+#else
+#include "../block/blk.h"
+#endif
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,35)
+#include <linux/init.h>
+#else
+#ifndef	__initdata
+#define	__initdata
+#endif
+#ifndef	__initfunc
+#define	__initfunc(__arginit) __arginit
+#endif
+#endif
+
+#include "scsi.h"
+#include "hosts.h"
+#include "constants.h"
+#include "sd.h"
+
+#include <linux/types.h>
+
+/*
+**	Define the BSD style u_int32 type
+*/
+typedef u32 u_int32;
+
+#include "ncr53c8xx.h"
+
+/*==========================================================
+**
+**	Configuration and Debugging
+**
+**==========================================================
+*/
+
+/*
+**    SCSI address of this device.
+**    The boot routines should have set it.
+**    If not, use this.
+*/
+
+#ifndef SCSI_NCR_MYADDR
+#define SCSI_NCR_MYADDR      (7)
+#endif
+
+/*
+**    The maximum number of tags per logic unit.
+**    Used only for disk devices that support tags.
+*/
+
+#ifndef SCSI_NCR_MAX_TAGS
+#define SCSI_NCR_MAX_TAGS    (4)
+#endif
+
+/*
+**    Number of targets supported by the driver.
+**    n permits target numbers 0..n-1.
+**    Default is 7, meaning targets #0..#6.
+**    #7 .. is myself.
+*/
+
+#ifdef SCSI_NCR_MAX_TARGET
+#define MAX_TARGET  (SCSI_NCR_MAX_TARGET)
+#else
+#define MAX_TARGET  (16)
+#endif
+
+/*
+**    Number of logic units supported by the driver.
+**    n enables logic unit numbers 0..n-1.
+**    The common SCSI devices require only
+**    one lun, so take 1 as the default.
+*/
+
+#ifdef SCSI_NCR_MAX_LUN
+#define MAX_LUN    SCSI_NCR_MAX_LUN
+#else
+#define MAX_LUN    (1)
+#endif
+
+/*
+**    Asynchronous pre-scaler (ns). Shall be 40
+*/
+ 
+#ifndef SCSI_NCR_MIN_ASYNC
+#define SCSI_NCR_MIN_ASYNC (40)
+#endif
+
+/*
+**    The maximum number of jobs scheduled for starting.
+**    There should be one slot per target, and one slot
+**    for each tag of each target in use.
+**    The calculation below is actually quite silly ...
+*/
+
+#ifdef SCSI_NCR_CAN_QUEUE
+#define MAX_START   (SCSI_NCR_CAN_QUEUE + 4)
+#else
+#define MAX_START   (MAX_TARGET + 7 * SCSI_NCR_MAX_TAGS)
+#endif
+
+/*
+**    The maximum number of segments a transfer is split into.
+*/
+
+#define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
+
+/*
+**    Io mapped or memory mapped.
+*/
+
+#if defined(SCSI_NCR_IOMAPPED)
+#define NCR_IOMAPPED
+#endif
+
+/*
+**	other
+*/
+
+#define NCR_SNOOP_TIMEOUT (1000000)
+
+/*==========================================================
+**
+**	Defines for Linux.
+**
+**	Linux and Bsd kernel functions are quite different.
+**	These defines allow a minimum change of the original
+**	code.
+**
+**==========================================================
+*/
+
+ /*
+ **	Obvious definitions
+ */
+
+#define printf		printk
+#define u_char		unsigned char
+#define u_short		unsigned short
+#define u_int		unsigned int
+#define u_long		unsigned long
+
+typedef	u_long		vm_offset_t;
+typedef	int		vm_size_t;
+
+#define bcopy(s, d, n)	memcpy((d), (s), (n))
+#define bzero(d, n)	memset((d), 0, (n))
+
+#ifndef offsetof
+#define offsetof(t, m)	((size_t) (&((t *)0)->m))
+#endif
+
+/*
+**	Address translation
+**
+**	On Linux 1.3.X, virt_to_bus() must be used to translate
+**	virtual memory addresses of the kernel data segment into
+**	IO bus adresses.
+**	On i386 architecture, IO bus addresses match the physical
+**	addresses. But on other architectures they can be different.
+**	In the original Bsd driver, vtophys() is called to translate
+**	data addresses to IO bus addresses. In order to minimize
+**	change, I decide to define vtophys() as virt_to_bus().
+*/
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+#define vtophys(p)	virt_to_bus(p)
+
+/*
+**	Memory mapped IO
+**
+**	Since linux-2.1, we must use ioremap() to map the io memory space.
+**	iounmap() to unmap it. That allows portability.
+**	Linux 1.3.X and 2.0.X allow to remap physical pages addresses greater 
+**	than the highest physical memory address to kernel virtual pages with 
+**	vremap() / vfree(). That was not portable but worked with i386 
+**	architecture.
+*/
+
+#ifndef NCR_IOMAPPED
+__initfunc(
+static vm_offset_t remap_pci_mem(u_long base, u_long size)
+)
+{
+	u_long page_base	= ((u_long) base) & PAGE_MASK;
+	u_long page_offs	= ((u_long) base) - page_base;
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,0)
+	u_long page_remapped	= (u_long) ioremap(page_base, page_offs+size);
+#else
+	u_long page_remapped	= (u_long) vremap(page_base, page_offs+size);
+#endif
+
+	return (vm_offset_t) (page_remapped ? (page_remapped + page_offs) : 0UL);
+}
+
+__initfunc(
+static void unmap_pci_mem(vm_offset_t vaddr, u_long size)
+)
+{
+	if (vaddr)
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,0)
+		iounmap((void *) (vaddr & PAGE_MASK));
+#else
+		vfree((void *) (vaddr & PAGE_MASK));
+#endif
+}
+#endif	/* !NCR_IOMAPPED */
+
+#else /* linux-1.2.13 */
+
+/*
+**	Linux 1.2.X assumes that addresses (virtual, physical, bus)
+**	are the same.
+**
+**	I have not found how to do MMIO. It seems that only processes can
+**	map high physical pages to virtual (Xservers can do MMIO).
+*/
+
+#define vtophys(p)	((u_long) (p))
+#endif
+
+/*
+**	Insert a delay in micro-seconds.
+*/
+
+static void DELAY(long us)
+{
+	for (;us>1000;us-=1000) udelay(1000);
+	if (us) udelay(us);
+}
+
+/*
+**	Internal data structure allocation.
+**
+**	Linux scsi memory poor pool is adjusted for the need of
+**	middle-level scsi driver.
+**	We allocate our control blocks in the kernel memory pool
+**	to avoid scsi pool shortage.
+**	I notice that kmalloc() returns NULL during host attach under
+**	Linux 1.2.13. But this ncr driver is reliable enough to
+**	accomodate with this joke.
+**
+**	kmalloc() only ensure 8 bytes boundary alignment.
+**	The NCR need better alignment for cache line bursting.
+**	The global header is moved betewen the NCB and CCBs and need 
+**	origin and destination addresses to have same lower four bits.
+**
+**	We use 32 boundary alignment for NCB and CCBs and offset multiple 
+**	of 32 for global header fields. That's too much but at least enough.
+*/
+
+#define ALIGN_SIZE(shift)	(1UL << shift)
+#define ALIGN_MASK(shift)	(~(ALIGN_SIZE(shift)-1))
+
+#define NCB_ALIGN_SHIFT		5
+#define CCB_ALIGN_SHIFT		5
+#define LCB_ALIGN_SHIFT		5
+#define SCR_ALIGN_SHIFT		5
+
+#define NCB_ALIGN_SIZE		ALIGN_SIZE(NCB_ALIGN_SHIFT)
+#define NCB_ALIGN_MASK		ALIGN_MASK(NCB_ALIGN_SHIFT)
+#define CCB_ALIGN_SIZE		ALIGN_SIZE(CCB_ALIGN_SHIFT)
+#define CCB_ALIGN_MASK		ALIGN_MASK(CCB_ALIGN_SHIFT)
+#define SCR_ALIGN_SIZE		ALIGN_SIZE(SCR_ALIGN_SHIFT)
+#define SCR_ALIGN_MASK		ALIGN_MASK(SCR_ALIGN_SHIFT)
+
+static void *m_alloc(int size, int a_shift)
+{
+	u_long addr;
+	void *ptr;
+	u_long a_size, a_mask;
+
+	if (a_shift < 3)
+		a_shift = 3;
+
+	a_size	= ALIGN_SIZE(a_shift);
+	a_mask	= ALIGN_MASK(a_shift);
+
+	ptr = (void *) kmalloc(size + a_size, GFP_ATOMIC);
+	if (ptr) {
+		addr	= (((u_long) ptr) + a_size) & a_mask;
+		*((void **) (addr - sizeof(void *))) = ptr;
+		ptr	= (void *) addr;
+	}
+
+	return ptr;
+}
+
+#ifdef MODULE
+static void m_free(void *ptr, int size)
+{
+	u_long addr;
+
+	if (ptr) {
+		addr	= (u_long) ptr;
+		ptr	= *((void **) (addr - sizeof(void *)));
+
+		kfree(ptr);
+	}
+}
+#endif
+
+/*
+**	Transfer direction
+**
+**	Low-level scsi drivers under Linux do not receive the expected 
+**	data transfer direction from upper scsi drivers.
+**	The driver will only check actual data direction for common 
+**	scsi opcodes. Other ones may cause problem, since they may 
+**	depend on device type or be vendor specific.
+**	I would prefer to never trust the device for data direction, 
+**	but that is not possible.
+**
+**	The original driver requires the expected direction to be known.
+**	The Linux version of the driver has been enhanced in order to 
+**	be able to transfer data in the direction choosen by the target. 
+*/
+
+#define XferNone	0
+#define XferIn		1
+#define XferOut		2
+#define XferBoth	3
+static int guess_xfer_direction(int opcode);
+
+/*
+**	Head of list of NCR boards
+**
+**	For kernel version < 1.3.70, host is retrieved by its irq level.
+**	For later kernels, the internal host control block address 
+**	(struct ncb) is used as device id parameter of the irq stuff.
+*/
+
+static struct Scsi_Host		*first_host	= NULL;
+static Scsi_Host_Template	*the_template	= NULL;	
+
+
+/*
+**	/proc directory entry and proc_info function
+*/
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+struct proc_dir_entry proc_scsi_ncr53c8xx = {
+    PROC_SCSI_NCR53C8XX, 9, "ncr53c8xx",
+    S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+# ifdef SCSI_NCR_PROC_INFO_SUPPORT
+int ncr53c8xx_proc_info(char *buffer, char **start, off_t offset,
+			int length, int hostno, int func);
+# endif
+#endif
+
+/*
+**	Table of target capabilities.
+**
+**	This bitmap is anded with the byte 7 of inquiry data on completion of
+**	INQUIRY command.
+** 	The driver never see zeroed bits and will ignore the corresponding
+**	capabilities of the target.
+*/
+
+static struct {
+	unsigned char and_map[MAX_TARGET];
+} target_capabilities[SCSI_NCR_MAX_HOST] = { NCR53C8XX_TARGET_CAPABILITIES };
+
+/*
+**	Driver setup.
+**
+**	This structure is initialized from linux config options.
+**	It can be overridden at boot-up by the boot command line.
+*/
+struct ncr_driver_setup {
+	unsigned master_parity	: 1;
+	unsigned scsi_parity	: 1;
+	unsigned disconnection	: 1;
+	unsigned special_features : 2;
+	unsigned ultra_scsi	: 2;
+	unsigned force_sync_nego: 1;
+	unsigned reverse_probe: 1;
+	unsigned pci_fix_up: 4;
+	u_char	use_nvram;
+	u_char	verbose;
+	u_char	default_tags;
+	u_short	default_sync;
+	u_short	debug;
+	u_char	burst_max;
+	u_char	led_pin;
+	u_char	max_wide;
+	u_char	settle_delay;
+	u_char	diff_support;
+	u_char	irqm;
+	u_char	bus_check;
+};
+
+static struct ncr_driver_setup
+	driver_setup			= SCSI_NCR_DRIVER_SETUP;
+
+#ifdef	SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
+static struct ncr_driver_setup
+	driver_safe_setup __initdata	= SCSI_NCR_DRIVER_SAFE_SETUP;
+#ifdef	MODULE
+char *ncr53c8xx = 0;	/* command line passed by insmod */
+#endif
+#endif
+
+/*
+**	Other Linux definitions
+*/
+
+#define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f))
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
+static void ncr53c8xx_select_queue_depths(struct Scsi_Host *host, struct scsi_device *devlist);
+#endif
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
+static void ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs);
+#else
+static void ncr53c8xx_intr(int irq, struct pt_regs * regs);
+#endif
+
+static void ncr53c8xx_timeout(unsigned long np);
+
+#define initverbose (driver_setup.verbose)
+#define bootverbose (np->verbose)
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+/*
+**	Symbios NvRAM data format
+*/
+#define SYMBIOS_NVRAM_SIZE 368
+#define SYMBIOS_NVRAM_ADDRESS 0x100
+
+struct Symbios_nvram {
+/* Header 6 bytes */
+	u_short start_marker;	/* 0x0000 */
+	u_short byte_count;	/* excluding header/trailer */
+	u_short checksum;
+
+/* Controller set up 20 bytes */
+	u_short	word0;		/* 0x3000 */
+	u_short	word2;		/* 0x0000 */
+	u_short	word4;		/* 0x0000 */
+	u_short	flags;
+#define SYMBIOS_SCAM_ENABLE	(1)
+#define SYMBIOS_PARITY_ENABLE	(1<<1)
+#define SYMBIOS_VERBOSE_MSGS	(1<<2)
+	u_short	flags1;
+#define SYMBIOS_SCAN_HI_LO	(1)
+	u_short	word10;		/* 0x00 */
+	u_short	flags3;		/* 0x00 */
+#define SYMBIOS_REMOVABLE_FLAGS	(3)		/* 0=none, 1=bootable, 2=all */
+	u_char	host_id;
+	u_char	byte15;		/* 0x04 */
+	u_short	word16;		/* 0x0410 */
+	u_short	word18;		/* 0x0000 */
+
+/* Boot order 14 bytes * 4 */
+	struct Symbios_host{
+		u_char	word0;		/* 0x0004:ok / 0x0000:nok */
+		u_short	device_id;	/* PCI device id */
+		u_short	vendor_id;	/* PCI vendor id */
+		u_char	byte6;		/* 0x00 */
+		u_char	device_fn;	/* PCI device/function number << 3*/
+		u_short	word8;
+		u_short	flags;
+#define	SYMBIOS_INIT_SCAN_AT_BOOT	(1)
+		u_short	io_port;	/* PCI io_port address */
+	} host[4];
+
+/* Targets 8 bytes * 16 */
+	struct Symbios_target {
+		u_short	flags;
+#define SYMBIOS_DISCONNECT_ENABLE	(1)
+#define SYMBIOS_SCAN_AT_BOOT_TIME	(1<<1)
+#define SYMBIOS_SCAN_LUNS		(1<<2)
+#define SYMBIOS_QUEUE_TAGS_ENABLED	(1<<3)
+		u_char	bus_width;	/* 0x08/0x10 */
+		u_char	sync_offset;
+		u_char	sync_period;	/* 4*period factor */
+		u_char	byte6;		/* 0x00 */
+		u_short	timeout;
+	} target[16];
+	u_char	spare_devices[19*8];
+	u_char	trailer[6];		/* 0xfe 0xfe 0x00 0x00 0x00 0x00 */
+};
+typedef struct Symbios_nvram	Symbios_nvram;
+typedef struct Symbios_host	Symbios_host;
+typedef struct Symbios_target	Symbios_target;
+
+/*
+**	Tekram NvRAM data format.
+*/
+#define TEKRAM_NVRAM_SIZE 64
+#define TEKRAM_NVRAM_ADDRESS 0
+
+struct Tekram_nvram {
+	struct Tekram_target {
+		u_char	flags;
+#define	TEKRAM_PARITY_CHECK		(1)
+#define TEKRAM_SYNC_NEGO		(1<<1)
+#define TEKRAM_DISCONNECT_ENABLE	(1<<2)
+#define	TEKRAM_START_CMD		(1<<3)
+#define TEKRAM_TAGGED_COMMANDS		(1<<4)
+#define TEKRAM_WIDE_NEGO		(1<<5)
+		u_char	sync_index;
+		u_short	word2;
+	} target[16];
+	u_char	host_id;
+	u_char	flags;
+#define TEKRAM_MORE_THAN_2_DRIVES	(1)
+#define TEKRAM_DRIVES_SUP_1GB		(1<<1)
+#define	TEKRAM_RESET_ON_POWER_ON	(1<<2)
+#define TEKRAM_ACTIVE_NEGATION		(1<<3)
+#define TEKRAM_IMMEDIATE_SEEK		(1<<4)
+#define	TEKRAM_SCAN_LUNS		(1<<5)
+#define	TEKRAM_REMOVABLE_FLAGS		(3<<6)	/* 0: disable; 1: boot device; 2:all */
+	u_char	boot_delay_index;
+	u_char	max_tags_index;
+	u_short	flags1;
+#define TEKRAM_F2_F6_ENABLED		(1)
+	u_short	spare[29];
+};
+typedef struct Tekram_nvram	Tekram_nvram;
+typedef struct Tekram_target	Tekram_target;
+
+static u_char Tekram_sync[12] __initdata = {25,31,37,43,50,62,75,125,12,15,18,21};
+
+#endif /* SCSI_NCR_NVRAM_SUPPORT */
+
+/*
+**	Structures used by ncr53c8xx_detect/ncr53c8xx_pci_init to 
+**	transmit device configuration to the ncr_attach() function.
+*/
+typedef struct {
+	int	bus;
+	u_char	device_fn;
+	u_int	base;
+	u_int	base_2;
+	u_int	io_port;
+	int	irq;
+/* port and reg fields to use INB, OUTB macros */
+	u_int	port;
+	volatile struct	ncr_reg	*reg;
+} ncr_slot;
+
+typedef struct {
+	int type;
+#define	SCSI_NCR_SYMBIOS_NVRAM	(1)
+#define	SCSI_NCR_TEKRAM_NVRAM	(2)
+#ifdef	SCSI_NCR_NVRAM_SUPPORT
+	union {
+		Symbios_nvram Symbios;
+		Tekram_nvram Tekram;
+	} data;
+#endif
+} ncr_nvram;
+
+/*
+**	Structure used by ncr53c8xx_detect/ncr53c8xx_pci_init
+**	to save data on each detected board for ncr_attach().
+*/
+typedef struct {
+	ncr_slot  slot;
+	ncr_chip  chip;
+	ncr_nvram *nvram;
+	int attach_done;
+} ncr_device;
+
+/*==========================================================
+**
+**	Debugging tags
+**
+**==========================================================
+*/
+
+#define DEBUG_ALLOC    (0x0001)
+#define DEBUG_PHASE    (0x0002)
+#define DEBUG_POLL     (0x0004)
+#define DEBUG_QUEUE    (0x0008)
+#define DEBUG_RESULT   (0x0010)
+#define DEBUG_SCATTER  (0x0020)
+#define DEBUG_SCRIPT   (0x0040)
+#define DEBUG_TINY     (0x0080)
+#define DEBUG_TIMING   (0x0100)
+#define DEBUG_NEGO     (0x0200)
+#define DEBUG_TAGS     (0x0400)
+#define DEBUG_FREEZE   (0x0800)
+#define DEBUG_RESTART  (0x1000)
+
+/*
+**    Enable/Disable debug messages.
+**    Can be changed at runtime too.
+*/
+
+#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
+	#define DEBUG_FLAGS ncr_debug
+#else
+	#define DEBUG_FLAGS	SCSI_NCR_DEBUG_FLAGS
+#endif
+
+
+
+/*==========================================================
+**
+**	assert ()
+**
+**==========================================================
+**
+**	modified copy from 386bsd:/usr/include/sys/assert.h
+**
+**----------------------------------------------------------
+*/
+
+#define	assert(expression) { \
+	if (!(expression)) { \
+		(void)printf(\
+			"assertion \"%s\" failed: file \"%s\", line %d\n", \
+			#expression, \
+			__FILE__, __LINE__); \
+	} \
+}
+
+/*==========================================================
+**
+**	Big/Little endian support.
+**
+**==========================================================
+*/
+
+/*
+**	If the NCR uses big endian addressing mode over the 
+**	PCI, actual io register addresses for byte and word 
+**	accesses must be changed according to lane routing.
+**	Btw, ncr_offb() and ncr_offw() macros only apply to 
+**	constants and so donnot generate bloated code.
+*/
+
+#if	defined(SCSI_NCR_BIG_ENDIAN)
+
+#define ncr_offb(o)	(((o)&~3)+((~((o)&3))&3))
+#define ncr_offw(o)	(((o)&~3)+((~((o)&3))&2))
+
+#else
+
+#define ncr_offb(o)	(o)
+#define ncr_offw(o)	(o)
+
+#endif
+
+/*
+**	If the CPU and the NCR use same endian-ness adressing,
+**	no byte reordering is needed for script patching.
+**	Macro cpu_to_scr() is to be used for script patching.
+**	Macro scr_to_cpu() is to be used for getting a DWORD 
+**	from the script.
+*/
+
+#if	defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
+
+#define cpu_to_scr(dw)	cpu_to_le32(dw)
+#define scr_to_cpu(dw)	le32_to_cpu(dw)
+
+#elif	defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
+
+#define cpu_to_scr(dw)	cpu_to_be32(dw)
+#define scr_to_cpu(dw)	be32_to_cpu(dw)
+
+#else
+
+#define cpu_to_scr(dw)	(dw)
+#define scr_to_cpu(dw)	(dw)
+
+#endif
+
+/*==========================================================
+**
+**	Access to the controller chip.
+**
+**	If NCR_IOMAPPED is defined, only IO are used by the driver.
+**
+**==========================================================
+*/
+
+/*
+**	If the CPU and the NCR use same endian-ness adressing,
+**	no byte reordering is needed for accessing chip io 
+**	registers. Functions suffixed by '_raw' are assumed 
+**	to access the chip over the PCI without doing byte 
+**	reordering. Functions suffixed by '_l2b' are 
+**	assumed to perform little-endian to big-endian byte 
+**	reordering, those suffixed by '_b2l' blah, blah,
+**	blah, ...
+*/
+
+#if defined(NCR_IOMAPPED)
+
+/*
+**	IO mapped only input / ouput
+*/
+
+#define	INB_OFF(o)		inb (np->port + ncr_offb(o))
+#define	OUTB_OFF(o, val)	outb ((val), np->port + ncr_offb(o))
+
+#if	defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
+
+#define	INW_OFF(o)		inw_l2b (np->port + ncr_offw(o))
+#define	INL_OFF(o)		inl_l2b (np->port + (o))
+
+#define	OUTW_OFF(o, val)	outw_b2l ((val), np->port + ncr_offw(o))
+#define	OUTL_OFF(o, val)	outl_b2l ((val), np->port + (o))
+
+#elif	defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
+
+#define	INW_OFF(o)		inw_b2l (np->port + ncr_offw(o))
+#define	INL_OFF(o)		inl_b2l (np->port + (o))
+
+#define	OUTW_OFF(o, val)	outw_l2b ((val), np->port + ncr_offw(o))
+#define	OUTL_OFF(o, val)	outl_l2b ((val), np->port + (o))
+
+#else
+
+#define	INW_OFF(o)		inw_raw (np->port + ncr_offw(o))
+#define	INL_OFF(o)		inl_raw (np->port + (o))
+
+#define	OUTW_OFF(o, val)	outw_raw ((val), np->port + ncr_offw(o))
+#define	OUTL_OFF(o, val)	outl_raw ((val), np->port + (o))
+
+#endif	/* ENDIANs */
+
+#else	/* defined NCR_IOMAPPED */
+
+/*
+**	MEMORY mapped IO input / output
+*/
+
+#define INB_OFF(o)		readb((char *)np->reg + ncr_offb(o))
+#define OUTB_OFF(o, val)	writeb((val), (char *)np->reg + ncr_offb(o))
+
+#if	defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
+
+#define INW_OFF(o)		readw_l2b((char *)np->reg + ncr_offw(o))
+#define INL_OFF(o)		readl_l2b((char *)np->reg + (o))
+
+#define OUTW_OFF(o, val)	writew_b2l((val), (char *)np->reg + ncr_offw(o))
+#define OUTL_OFF(o, val)	writel_b2l((val), (char *)np->reg + (o))
+
+#elif	defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
+
+#define INW_OFF(o)		readw_b2l((char *)np->reg + ncr_offw(o))
+#define INL_OFF(o)		readl_b2l((char *)np->reg + (o))
+
+#define OUTW_OFF(o, val)	writew_l2b((val), (char *)np->reg + ncr_offw(o))
+#define OUTL_OFF(o, val)	writel_l2b((val), (char *)np->reg + (o))
+
+#else
+
+#define INW_OFF(o)		readw_raw((char *)np->reg + ncr_offw(o))
+#define INL_OFF(o)		readl_raw((char *)np->reg + (o))
+
+#define OUTW_OFF(o, val)	writew_raw((val), (char *)np->reg + ncr_offw(o))
+#define OUTL_OFF(o, val)	writel_raw((val), (char *)np->reg + (o))
+
+#endif
+
+#endif	/* defined NCR_IOMAPPED */
+
+#define INB(r)		INB_OFF (offsetof(struct ncr_reg,r))
+#define INW(r)		INW_OFF (offsetof(struct ncr_reg,r))
+#define INL(r)		INL_OFF (offsetof(struct ncr_reg,r))
+
+#define OUTB(r, val)	OUTB_OFF (offsetof(struct ncr_reg,r), (val))
+#define OUTW(r, val)	OUTW_OFF (offsetof(struct ncr_reg,r), (val))
+#define OUTL(r, val)	OUTL_OFF (offsetof(struct ncr_reg,r), (val))
+
+/*
+**	Set bit field ON, OFF 
+*/
+
+#define OUTONB(r, m)	OUTB(r, INB(r) | (m))
+#define OUTOFFB(r, m)	OUTB(r, INB(r) & ~(m))
+#define OUTONW(r, m)	OUTW(r, INW(r) | (m))
+#define OUTOFFW(r, m)	OUTW(r, INW(r) & ~(m))
+#define OUTONL(r, m)	OUTL(r, INL(r) | (m))
+#define OUTOFFL(r, m)	OUTL(r, INL(r) & ~(m))
+
+
+/*==========================================================
+**
+**	Command control block states.
+**
+**==========================================================
+*/
+
+#define HS_IDLE		(0)
+#define HS_BUSY		(1)
+#define HS_NEGOTIATE	(2)	/* sync/wide data transfer*/
+#define HS_DISCONNECT	(3)	/* Disconnected by target */
+
+#define HS_COMPLETE	(4)
+#define HS_SEL_TIMEOUT	(5)	/* Selection timeout      */
+#define HS_RESET	(6)	/* SCSI reset	     */
+#define HS_ABORTED	(7)	/* Transfer aborted       */
+#define HS_TIMEOUT	(8)	/* Software timeout       */
+#define HS_FAIL		(9)	/* SCSI or PCI bus errors */
+#define HS_UNEXPECTED	(10)	/* Unexpected disconnect  */
+
+#define HS_DONEMASK	(0xfc)
+
+/*==========================================================
+**
+**	Software Interrupt Codes
+**
+**==========================================================
+*/
+
+#define	SIR_SENSE_RESTART	(1)
+#define	SIR_SENSE_FAILED	(2)
+#define	SIR_STALL_RESTART	(3)
+#define	SIR_STALL_QUEUE		(4)
+#define	SIR_NEGO_SYNC		(5)
+#define	SIR_NEGO_WIDE		(6)
+#define	SIR_NEGO_FAILED		(7)
+#define	SIR_NEGO_PROTO		(8)
+#define	SIR_REJECT_RECEIVED	(9)
+#define	SIR_REJECT_SENT		(10)
+#define	SIR_IGN_RESIDUE		(11)
+#define	SIR_MISSING_SAVE	(12)
+#define	SIR_DATA_IO_IS_OUT	(13)
+#define	SIR_DATA_IO_IS_IN	(14)
+#define	SIR_MAX			(14)
+
+/*==========================================================
+**
+**	Extended error codes.
+**	xerr_status field of struct ccb.
+**
+**==========================================================
+*/
+
+#define	XE_OK		(0)
+#define	XE_EXTRA_DATA	(1)	/* unexpected data phase */
+#define	XE_BAD_PHASE	(2)	/* illegal phase (4/5)   */
+
+/*==========================================================
+**
+**	Negotiation status.
+**	nego_status field	of struct ccb.
+**
+**==========================================================
+*/
+
+#define NS_SYNC		(1)
+#define NS_WIDE		(2)
+
+/*==========================================================
+**
+**	"Special features" of targets.
+**	quirks field		of struct tcb.
+**	actualquirks field	of struct ccb.
+**
+**==========================================================
+*/
+
+#define	QUIRK_AUTOSAVE	(0x01)
+#define	QUIRK_NOMSG	(0x02)
+#define QUIRK_NOSYNC	(0x10)
+#define QUIRK_NOWIDE16	(0x20)
+#define	QUIRK_UPDATE	(0x80)
+
+/*==========================================================
+**
+**	Capability bits in Inquire response byte 7.
+**
+**==========================================================
+*/
+
+#define	INQ7_QUEUE	(0x02)
+#define	INQ7_SYNC	(0x10)
+#define	INQ7_WIDE16	(0x20)
+
+/*==========================================================
+**
+**	Misc.
+**
+**==========================================================
+*/
+
+#define CCB_MAGIC	(0xf2691ad2)
+
+/*==========================================================
+**
+**	Declaration of structs.
+**
+**==========================================================
+*/
+
+struct tcb;
+struct lcb;
+struct ccb;
+struct ncb;
+struct script;
+
+typedef struct ncb * ncb_p;
+typedef struct tcb * tcb_p;
+typedef struct lcb * lcb_p;
+typedef struct ccb * ccb_p;
+
+struct link {
+	ncrcmd	l_cmd;
+	ncrcmd	l_paddr;
+};
+
+struct	usrcmd {
+	u_long	target;
+	u_long	lun;
+	u_long	data;
+	u_long	cmd;
+};
+
+#define UC_SETSYNC      10
+#define UC_SETTAGS	11
+#define UC_SETDEBUG	12
+#define UC_SETORDER	13
+#define UC_SETWIDE	14
+#define UC_SETFLAG	15
+#define UC_CLEARPROF	16
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+#define UC_DEBUG_ERROR_RECOVERY 17
+#endif
+
+#define	UF_TRACE	(0x01)
+#define	UF_NODISC	(0x02)
+#define	UF_NOSCAN	(0x04)
+
+/*---------------------------------------
+**
+**	Timestamps for profiling
+**
+**---------------------------------------
+*/
+
+struct tstamp {
+	u_long start;
+	u_long end;
+	u_long select;
+	u_long command;
+	u_long status;
+	u_long disconnect;
+	u_long reselect;
+};
+
+/*
+**	profiling data (per device)
+*/
+
+struct profile {
+	u_long	num_trans;
+	u_long	num_kbytes;
+	u_long	rest_bytes;
+	u_long	num_disc;
+	u_long	num_break;
+	u_long	num_int;
+	u_long	num_fly;
+	u_long	ms_setup;
+	u_long	ms_data;
+	u_long	ms_disc;
+	u_long	ms_post;
+};
+
+/*==========================================================
+**
+**	Declaration of structs:		target control block
+**
+**==========================================================
+*/
+
+struct tcb {
+	/*
+	**	during reselection the ncr jumps to this point
+	**	with SFBR set to the encoded target number
+	**	with bit 7 set.
+	**	if it's not this target, jump to the next.
+	**
+	**	JUMP  IF (SFBR != #target#)
+	**	@(next tcb)
+	*/
+
+	struct link   jump_tcb;
+
+	/*
+	**	load the actual values for the sxfer and the scntl3
+	**	register (sync/wide mode).
+	**
+	**	SCR_COPY (1);
+	**	@(sval field of this tcb)
+	**	@(sxfer register)
+	**	SCR_COPY (1);
+	**	@(wval field of this tcb)
+	**	@(scntl3 register)
+	*/
+
+	ncrcmd	getscr[6];
+
+	/*
+	**	if next message is "identify"
+	**	then load the message to SFBR,
+	**	else load 0 to SFBR.
+	**
+	**	CALL
+	**	<RESEL_LUN>
+	*/
+
+	struct link   call_lun;
+
+	/*
+	**	now look for the right lun.
+	**
+	**	JUMP
+	**	@(first ccb of this lun)
+	*/
+
+	struct link   jump_lcb;
+
+	/*
+	**	pointer to interrupted getcc ccb
+	*/
+
+	ccb_p   hold_cp;
+
+	/*
+	**	pointer to ccb used for negotiating.
+	**	Avoid to start a nego for all queued commands 
+	**	when tagged command queuing is enabled.
+	*/
+
+	ccb_p   nego_cp;
+
+	/*
+	**	statistical data
+	*/
+
+	u_long	transfers;
+	u_long	bytes;
+
+	/*
+	**	user settable limits for sync transfer
+	**	and tagged commands.
+	**	These limits are read from the NVRAM if present.
+	*/
+
+	u_char	usrsync;
+	u_char	usrwide;
+	u_char	usrtags;
+	u_char	usrflag;
+
+	u_char	numtags;
+	u_char	maxtags;
+	u_short	num_good;
+
+	/*
+	**	negotiation of wide and synch transfer.
+	**	device quirks.
+	*/
+
+/*0*/	u_char	minsync;
+/*1*/	u_char	sval;
+/*2*/	u_short	period;
+/*0*/	u_char	maxoffs;
+
+/*1*/	u_char	quirks;
+
+/*2*/	u_char	widedone;
+/*3*/	u_char	wval;
+	/*
+	**	inquire data
+	*/
+#define MAX_INQUIRE 36
+	u_char	inqdata[MAX_INQUIRE];
+
+	/*
+	**	the lcb's of this tcb
+	*/
+
+	lcb_p   lp[MAX_LUN];
+};
+
+/*==========================================================
+**
+**	Declaration of structs:		lun control block
+**
+**==========================================================
+*/
+
+struct lcb {
+	/*
+	**	during reselection the ncr jumps to this point
+	**	with SFBR set to the "Identify" message.
+	**	if it's not this lun, jump to the next.
+	**
+	**	JUMP  IF (SFBR != #lun#)
+	**	@(next lcb of this target)
+	*/
+
+	struct link	jump_lcb;
+
+	/*
+	**	if next message is "simple tag",
+	**	then load the tag to SFBR,
+	**	else load 0 to SFBR.
+	**
+	**	CALL
+	**	<RESEL_TAG>
+	*/
+
+	struct link	call_tag;
+
+	/*
+	**	now look for the right ccb.
+	**
+	**	JUMP
+	**	@(first ccb of this lun)
+	*/
+
+	struct link	jump_ccb;
+
+	/*
+	**	start of the ccb chain
+	*/
+
+	ccb_p	next_ccb;
+
+	/*
+	**	Control of tagged queueing
+	*/
+
+	u_char		reqccbs;
+	u_char		actccbs;
+	u_char		reqlink;
+	u_char		actlink;
+	u_char		usetags;
+	u_char		lasttag;
+
+	/*
+	**	Linux specific fields:
+	**	Number of active commands and current credit.
+	**	Should be managed by the generic scsi driver
+	*/
+
+	u_char		active;
+	u_char		opennings;
+
+	/*-----------------------------------------------
+	**	Flag to force M_ORDERED_TAG on next command
+	**	in order to avoid spurious timeout when
+	**	M_SIMPLE_TAG is used for all operations.
+	**-----------------------------------------------
+	*/
+	u_char	force_ordered_tag;
+#define NCR_TIMEOUT_INCREASE	(5*HZ)
+};
+
+/*==========================================================
+**
+**      Declaration of structs:     COMMAND control block
+**
+**==========================================================
+**
+**	This substructure is copied from the ccb to a
+**	global address after selection (or reselection)
+**	and copied back before disconnect.
+**
+**	These fields are accessible to the script processor.
+**
+**----------------------------------------------------------
+*/
+
+struct head {
+	/*
+	**	Execution of a ccb starts at this point.
+	**	It's a jump to the "SELECT" label
+	**	of the script.
+	**
+	**	After successful selection the script
+	**	processor overwrites it with a jump to
+	**	the IDLE label of the script.
+	*/
+
+	struct link	launch;
+
+	/*
+	**	Saved data pointer.
+	**	Points to the position in the script
+	**	responsible for the actual transfer
+	**	of data.
+	**	It's written after reception of a
+	**	"SAVE_DATA_POINTER" message.
+	**	The goalpointer points after
+	**	the last transfer command.
+	*/
+
+	u_int32		savep;
+	u_int32		lastp;
+	u_int32		goalp;
+
+	/*
+	**	The virtual address of the ccb
+	**	containing this header.
+	*/
+
+	ccb_p	cp;
+
+	/*
+	**	space for some timestamps to gather
+	**	profiling data about devices and this driver.
+	*/
+
+	struct tstamp	stamp;
+
+	/*
+	**	status fields.
+	*/
+
+	u_char		scr_st[4];	/* script status */
+	u_char		status[4];	/* host status. Must be the last */
+					/* DWORD of the CCB header */
+};
+
+/*
+**	The status bytes are used by the host and the script processor.
+**
+**	The byte corresponding to the host_status must be stored in the 
+**	last DWORD of the CCB header since it is used for command 
+**	completion (ncr_wakeup()). Doing so, we are sure that the header 
+**	has been entirely copied back to the CCB when the host_status is 
+**	seen complete by the CPU.
+**
+**	The last four bytes (status[4]) are copied to the scratchb register
+**	(declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
+**	and copied back just after disconnecting.
+**	Inside the script the XX_REG are used.
+**
+**	The first four bytes (scr_st[4]) are used inside the script by 
+**	"COPY" commands.
+**	Because source and destination must have the same alignment
+**	in a DWORD, the fields HAVE to be at the choosen offsets.
+**		xerr_st		0	(0x34)	scratcha
+**		sync_st		1	(0x05)	sxfer
+**		wide_st		3	(0x03)	scntl3
+*/
+
+/*
+**	Last four bytes (script)
+*/
+#define  QU_REG	scr0
+#define  HS_REG	scr1
+#define  HS_PRT	nc_scr1
+#define  SS_REG	scr2
+#define  PS_REG	scr3
+
+/*
+**	Last four bytes (host)
+*/
+#define  actualquirks  phys.header.status[0]
+#define  host_status   phys.header.status[1]
+#define  scsi_status   phys.header.status[2]
+#define  parity_status phys.header.status[3]
+
+/*
+**	First four bytes (script)
+*/
+#define  xerr_st       header.scr_st[0]
+#define  sync_st       header.scr_st[1]
+#define  nego_st       header.scr_st[2]
+#define  wide_st       header.scr_st[3]
+
+/*
+**	First four bytes (host)
+*/
+#define  xerr_status   phys.xerr_st
+#define  sync_status   phys.sync_st
+#define  nego_status   phys.nego_st
+#define  wide_status   phys.wide_st
+
+/*==========================================================
+**
+**      Declaration of structs:     Data structure block
+**
+**==========================================================
+**
+**	During execution of a ccb by the script processor,
+**	the DSA (data structure address) register points
+**	to this substructure of the ccb.
+**	This substructure contains the header with
+**	the script-processor-changable data and
+**	data blocks for the indirect move commands.
+**
+**----------------------------------------------------------
+*/
+
+struct dsb {
+
+	/*
+	**	Header.
+	**	Has to be the first entry,
+	**	because it's jumped to by the
+	**	script processor
+	*/
+
+	struct head	header;
+
+	/*
+	**	Table data for Script
+	*/
+
+	struct scr_tblsel  select;
+	struct scr_tblmove smsg  ;
+	struct scr_tblmove smsg2 ;
+	struct scr_tblmove cmd   ;
+	struct scr_tblmove scmd  ;
+	struct scr_tblmove sense ;
+	struct scr_tblmove data [MAX_SCATTER];
+};
+
+/*==========================================================
+**
+**      Declaration of structs:     Command control block.
+**
+**==========================================================
+**
+**	During execution of a ccb by the script processor,
+**	the DSA (data structure address) register points
+**	to this substructure of the ccb.
+**	This substructure contains the header with
+**	the script-processor-changable data and then
+**	data blocks for the indirect move commands.
+**
+**----------------------------------------------------------
+*/
+
+
+struct ccb {
+	/*
+	**	This field forces 32 bytes alignement for phys.header,
+	**	in order to use cache line bursting when copying it 
+	**	to the ncb.
+	*/
+
+	struct link		filler[2];
+
+	/*
+	**	during reselection the ncr jumps to this point.
+	**	If a "SIMPLE_TAG" message was received,
+	**	then SFBR is set to the tag.
+	**	else SFBR is set to 0
+	**	If looking for another tag, jump to the next ccb.
+	**
+	**	JUMP  IF (SFBR != #TAG#)
+	**	@(next ccb of this lun)
+	*/
+
+	struct link		jump_ccb;
+
+	/*
+	**	After execution of this call, the return address
+	**	(in  the TEMP register) points to the following
+	**	data structure block.
+	**	So copy it to the DSA register, and start
+	**	processing of this data structure.
+	**
+	**	CALL
+	**	<RESEL_TMP>
+	*/
+
+	struct link		call_tmp;
+
+	/*
+	**	This is the data structure which is
+	**	to be executed by the script processor.
+	*/
+
+	struct dsb		phys;
+
+	/*
+	**	If a data transfer phase is terminated too early
+	**	(after reception of a message (i.e. DISCONNECT)),
+	**	we have to prepare a mini script to transfer
+	**	the rest of the data.
+	*/
+
+	ncrcmd			patch[8];
+
+	/*
+	**	The general SCSI driver provides a
+	**	pointer to a control block.
+	*/
+
+	Scsi_Cmnd	*cmd;
+	int data_len;
+
+	/*
+	**	We prepare a message to be sent after selection,
+	**	and a second one to be sent after getcc selection.
+	**      Contents are IDENTIFY and SIMPLE_TAG.
+	**	While negotiating sync or wide transfer,
+	**	a SDTM or WDTM message is appended.
+	*/
+
+	u_char			scsi_smsg [8];
+	u_char			scsi_smsg2[8];
+
+	/*
+	**	Lock this ccb.
+	**	Flag is used while looking for a free ccb.
+	*/
+
+	u_long		magic;
+
+	/*
+	**	Physical address of this instance of ccb
+	*/
+
+	u_long		p_ccb;
+
+	/*
+	**	Completion time out for this job.
+	**	It's set to time of start + allowed number of seconds.
+	*/
+
+	u_long		tlimit;
+
+	/*
+	**	All ccbs of one hostadapter are chained.
+	*/
+
+	ccb_p		link_ccb;
+
+	/*
+	**	All ccbs of one target/lun are chained.
+	*/
+
+	ccb_p		next_ccb;
+
+	/*
+	**	Sense command
+	*/
+
+	u_char		sensecmd[6];
+
+	/*
+	**	Tag for this transfer.
+	**	It's patched into jump_ccb.
+	**	If it's not zero, a SIMPLE_TAG
+	**	message is included in smsg.
+	*/
+
+	u_char			tag;
+
+	/*
+	**	Number of segments of the scatter list.
+	**	Used for recalculation of savep/goalp/lastp on 
+	**	SIR_DATA_IO_IS_OUT interrupt.
+	*/
+	
+	u_char			segments;
+};
+
+#define CCB_PHYS(cp,lbl)	(cp->p_ccb + offsetof(struct ccb, lbl))
+
+/*==========================================================
+**
+**      Declaration of structs:     NCR device descriptor
+**
+**==========================================================
+*/
+
+struct ncb {
+	/*
+	**	The global header.
+	**	Accessible to both the host and the
+	**	script-processor.
+	**	Is 32 bytes aligned since ncb is, in order to 
+	**	allow cache line bursting when copying it from or 
+	**	to ccbs.
+	*/
+	struct head     header;
+
+	/*-----------------------------------------------
+	**	Specific Linux fields
+	**-----------------------------------------------
+	*/
+	int    unit;			/* Unit number                       */
+	char   chip_name[8];		/* Chip name                         */
+	char   inst_name[16];		/* Instance name                     */
+	struct timer_list timer;	/* Timer link header                 */
+	int	ncr_cache;		/* Cache test variable               */
+	Scsi_Cmnd *waiting_list;	/* Waiting list header for commands  */
+					/* that we can't put into the squeue */
+	u_long	settle_time;		/* Reset in progess		     */
+	u_char	release_stage;		/* Synchronisation stage on release  */
+	u_char	verbose;		/* Boot verbosity for this controller*/
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	u_char	debug_error_recovery;
+	u_char	stalling;
+	u_char	assert_atn;
+#endif
+
+	/*-----------------------------------------------
+	**	Added field to support differences
+	**	between ncr chips.
+	**	sv_xxx are some io register bit value at start-up and
+	**	so assumed to have been set by the sdms bios.
+	**	rv_xxx are the bit fields of io register that will keep 
+	**	the features used by the driver.
+	**-----------------------------------------------
+	*/
+	u_short	device_id;
+	u_char	revision_id;
+
+	u_char	sv_scntl0;
+	u_char	sv_scntl3;
+	u_char	sv_dmode;
+	u_char	sv_dcntl;
+	u_char	sv_ctest3;
+	u_char	sv_ctest4;
+	u_char	sv_ctest5;
+	u_char	sv_gpcntl;
+	u_char	sv_stest2;
+	u_char	sv_stest4;
+
+	u_char	rv_scntl0;
+	u_char	rv_scntl3;
+	u_char	rv_dmode;
+	u_char	rv_dcntl;
+	u_char	rv_ctest3;
+	u_char	rv_ctest4;
+	u_char	rv_ctest5;
+	u_char	rv_stest2;
+
+	u_char	scsi_mode;
+
+	/*-----------------------------------------------
+	**	Scripts ..
+	**-----------------------------------------------
+	**
+	**	During reselection the ncr jumps to this point.
+	**	The SFBR register is loaded with the encoded target id.
+	**
+	**	Jump to the first target.
+	**
+	**	JUMP
+	**	@(next tcb)
+	*/
+	struct link     jump_tcb;
+
+	/*-----------------------------------------------
+	**	Configuration ..
+	**-----------------------------------------------
+	**
+	**	virtual and physical addresses
+	**	of the 53c810 chip.
+	*/
+	vm_offset_t     vaddr;
+	vm_offset_t     paddr;
+
+	vm_offset_t     vaddr2;
+	vm_offset_t     paddr2;
+
+	/*
+	**	pointer to the chip's registers.
+	*/
+	volatile
+	struct ncr_reg* reg;
+
+	/*
+	**	A copy of the scripts, relocated for this ncb.
+	*/
+	struct script	*script0;
+	struct scripth	*scripth0;
+
+	/*
+	**	Scripts instance virtual address.
+	*/
+	struct script	*script;
+	struct scripth	*scripth;
+
+	/*
+	**	Scripts instance physical address.
+	*/
+	u_long		p_script;
+	u_long		p_scripth;
+
+	/*
+	**	The SCSI address of the host adapter.
+	*/
+	u_char	  myaddr;
+
+	/*
+	**	Max dwords burst supported by the adapter.
+	*/
+	u_char		maxburst;	/* log base 2 of dwords burst	*/
+
+	/*
+	**	timing parameters
+	*/
+	u_char		minsync;	/* Minimum sync period factor	*/
+	u_char		maxsync;	/* Maximum sync period factor	*/
+	u_char		maxoffs;	/* Max scsi offset		*/
+	u_char		multiplier;	/* Clock multiplier (1,2,4)	*/
+	u_char		clock_divn;	/* Number of clock divisors	*/
+	u_long		clock_khz;	/* SCSI clock frequency in KHz	*/
+	u_int		features;	/* Chip features map		*/
+
+
+	/*-----------------------------------------------
+	**	Link to the generic SCSI driver
+	**-----------------------------------------------
+	*/
+
+	/* struct scsi_link	sc_link; */
+
+	/*-----------------------------------------------
+	**	Job control
+	**-----------------------------------------------
+	**
+	**	Commands from user
+	*/
+	struct usrcmd	user;
+	u_char		order;
+
+	/*
+	**	Target data
+	*/
+	struct tcb	target[MAX_TARGET];
+
+	/*
+	**	Start queue.
+	*/
+	u_int32		squeue [MAX_START];
+	u_short		squeueput;
+	u_short		actccbs;
+
+	/*
+	**	Timeout handler
+	*/
+#if 0
+	u_long		heartbeat;
+	u_short		ticks;
+	u_short		latetime;
+#endif
+	u_long		lasttime;
+
+	/*-----------------------------------------------
+	**	Debug and profiling
+	**-----------------------------------------------
+	**
+	**	register dump
+	*/
+	struct ncr_reg	regdump;
+	u_long		regtime;
+
+	/*
+	**	Profiling data
+	*/
+	struct profile	profile;
+	u_long		disc_phys;
+	u_long		disc_ref;
+
+	/*
+	**	The global control block.
+	**	It's used only during the configuration phase.
+	**	A target control block will be created
+	**	after the first successful transfer.
+	*/
+	struct ccb      *ccb;
+
+	/*
+	**	message buffers.
+	**	Should be longword aligned,
+	**	because they're written with a
+	**	COPY script command.
+	*/
+	u_char		msgout[8];
+	u_char		msgin [8];
+	u_int32		lastmsg;
+
+	/*
+	**	Buffer for STATUS_IN phase.
+	*/
+	u_char		scratch;
+
+	/*
+	**	controller chip dependent maximal transfer width.
+	*/
+	u_char		maxwide;
+
+	/*
+	**	option for M_IDENTIFY message: enables disconnecting
+	*/
+	u_char		disc;
+
+	/*
+	**	address of the ncr control registers in io space
+	*/
+	u_int		port;
+
+	/*
+	**	irq level
+	*/
+	u_short		irq;
+};
+
+#define NCB_SCRIPT_PHYS(np,lbl)	 (np->p_script  + offsetof (struct script, lbl))
+#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth, lbl))
+
+/*==========================================================
+**
+**
+**      Script for NCR-Processor.
+**
+**	Use ncr_script_fill() to create the variable parts.
+**	Use ncr_script_copy_and_bind() to make a copy and
+**	bind to physical addresses.
+**
+**
+**==========================================================
+**
+**	We have to know the offsets of all labels before
+**	we reach them (for forward jumps).
+**	Therefore we declare a struct here.
+**	If you make changes inside the script,
+**	DON'T FORGET TO CHANGE THE LENGTHS HERE!
+**
+**----------------------------------------------------------
+*/
+
+/*
+**	Script fragments which are loaded into the on-board RAM 
+**	of 825A, 875 and 895 chips.
+*/
+struct script {
+	ncrcmd	start		[  4];
+	ncrcmd	start0		[  2];
+	ncrcmd	start1		[  3];
+	ncrcmd  startpos	[  1];
+	ncrcmd  trysel		[  8];
+	ncrcmd	skip		[  8];
+	ncrcmd	skip2		[  3];
+	ncrcmd  idle		[  2];
+	ncrcmd	select		[ 22];
+	ncrcmd	prepare		[  4];
+	ncrcmd	loadpos		[ 14];
+	ncrcmd	prepare2	[ 24];
+	ncrcmd	setmsg		[  5];
+	ncrcmd  clrack		[  2];
+	ncrcmd  dispatch	[ 38];
+	ncrcmd	no_data		[ 17];
+	ncrcmd  checkatn	[ 10];
+	ncrcmd  command		[ 15];
+	ncrcmd  status		[ 27];
+	ncrcmd  msg_in		[ 26];
+	ncrcmd  msg_bad		[  6];
+	ncrcmd  complete	[ 13];
+	ncrcmd	cleanup		[ 12];
+	ncrcmd	cleanup0	[ 11];
+	ncrcmd	signal		[ 10];
+	ncrcmd  save_dp		[  5];
+	ncrcmd  restore_dp	[  5];
+	ncrcmd  disconnect	[ 12];
+	ncrcmd  disconnect0	[  5];
+	ncrcmd  disconnect1	[ 23];
+	ncrcmd	msg_out		[  9];
+	ncrcmd	msg_out_done	[  7];
+	ncrcmd  badgetcc	[  6];
+	ncrcmd	reselect	[  8];
+	ncrcmd	reselect1	[  8];
+	ncrcmd	reselect2	[  8];
+	ncrcmd	resel_tmp	[  5];
+	ncrcmd  resel_lun	[ 18];
+	ncrcmd	resel_tag	[ 24];
+	ncrcmd  data_io		[  6];
+	ncrcmd  data_in		[MAX_SCATTER * 4 + 4];
+};
+
+/*
+**	Script fragments which stay in main memory for all chips.
+*/
+struct scripth {
+	ncrcmd  tryloop		[MAX_START*5+2];
+	ncrcmd  msg_parity	[  6];
+	ncrcmd	msg_reject	[  8];
+	ncrcmd	msg_ign_residue	[ 32];
+	ncrcmd  msg_extended	[ 18];
+	ncrcmd  msg_ext_2	[ 18];
+	ncrcmd	msg_wdtr	[ 27];
+	ncrcmd  msg_ext_3	[ 18];
+	ncrcmd	msg_sdtr	[ 27];
+	ncrcmd	msg_out_abort	[ 10];
+	ncrcmd  getcc		[  4];
+	ncrcmd  getcc1		[  5];
+#ifdef NCR_GETCC_WITHMSG
+	ncrcmd	getcc2		[ 33];
+#else
+	ncrcmd	getcc2		[ 14];
+#endif
+	ncrcmd	getcc3		[ 10];
+	ncrcmd  data_out	[MAX_SCATTER * 4 + 4];
+	ncrcmd	aborttag	[  4];
+	ncrcmd	abort		[ 22];
+	ncrcmd	snooptest	[  9];
+	ncrcmd	snoopend	[  2];
+};
+
+/*==========================================================
+**
+**
+**      Function headers.
+**
+**
+**==========================================================
+*/
+
+static	void	ncr_alloc_ccb	(ncb_p np, u_long t, u_long l);
+static	void	ncr_complete	(ncb_p np, ccb_p cp);
+static	void	ncr_exception	(ncb_p np);
+static	void	ncr_free_ccb	(ncb_p np, ccb_p cp, u_long t, u_long l);
+static	void	ncr_getclock	(ncb_p np, int mult);
+static	void	ncr_selectclock	(ncb_p np, u_char scntl3);
+static	ccb_p	ncr_get_ccb	(ncb_p np, u_long t,u_long l);
+static	void	ncr_init	(ncb_p np, int reset, char * msg, u_long code);
+static	int	ncr_int_sbmc	(ncb_p np);
+static	int	ncr_int_par	(ncb_p np);
+static	void	ncr_int_ma	(ncb_p np);
+static	void	ncr_int_sir	(ncb_p np);
+static  void    ncr_int_sto     (ncb_p np);
+static	u_long	ncr_lookup	(char* id);
+static	void	ncr_negotiate	(struct ncb* np, struct tcb* tp);
+static	void	ncr_opennings	(ncb_p np, lcb_p lp, Scsi_Cmnd * xp);
+
+#ifdef SCSI_NCR_PROFILE_SUPPORT
+static	void	ncb_profile	(ncb_p np, ccb_p cp);
+#endif
+
+static	void	ncr_script_copy_and_bind
+				(ncb_p np, ncrcmd *src, ncrcmd *dst, int len);
+static  void    ncr_script_fill (struct script * scr, struct scripth * scripth);
+static	int	ncr_scatter	(ccb_p cp, Scsi_Cmnd *cmd);
+static	void	ncr_setmaxtags	(ncb_p np, tcb_p tp, u_long numtags);
+static	void	ncr_getsync	(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p);
+static	void	ncr_setsync	(ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer);
+static	void	ncr_settags     (tcb_p tp, lcb_p lp);
+static	void	ncr_setwide	(ncb_p np, ccb_p cp, u_char wide, u_char ack);
+static	int	ncr_show_msg	(u_char * msg);
+static	int	ncr_snooptest	(ncb_p np);
+static	void	ncr_timeout	(ncb_p np);
+static  void    ncr_wakeup      (ncb_p np, u_long code);
+static	void	ncr_start_reset	(ncb_p np, int settle_delay);
+static	int	ncr_reset_scsi_bus (ncb_p np, int enab_int, int settle_delay);
+
+#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
+static	void	ncr_usercmd	(ncb_p np);
+#endif
+
+static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device);
+
+static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd);
+static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd);
+static void process_waiting_list(ncb_p np, int sts);
+
+#define remove_from_waiting_list(np, cmd) \
+		retrieve_from_waiting_list(1, (np), (cmd))
+#define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
+#define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+static	int	ncr_get_Symbios_nvram	(ncr_slot *np, Symbios_nvram *nvram);
+static	int	ncr_get_Tekram_nvram	(ncr_slot *np, Tekram_nvram *nvram);
+#endif
+
+/*==========================================================
+**
+**
+**      Global static data.
+**
+**
+**==========================================================
+*/
+
+#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
+static int ncr_debug = SCSI_NCR_DEBUG_FLAGS;
+#endif
+
+static inline char *ncr_name (ncb_p np)
+{
+	return np->inst_name;
+}
+
+
+/*==========================================================
+**
+**
+**      Scripts for NCR-Processor.
+**
+**      Use ncr_script_bind for binding to physical addresses.
+**
+**
+**==========================================================
+**
+**	NADDR generates a reference to a field of the controller data.
+**	PADDR generates a reference to another part of the script.
+**	RADDR generates a reference to a script processor register.
+**	FADDR generates a reference to a script processor register
+**		with offset.
+**
+**----------------------------------------------------------
+*/
+
+#define	RELOC_SOFTC	0x40000000
+#define	RELOC_LABEL	0x50000000
+#define	RELOC_REGISTER	0x60000000
+#define	RELOC_KVAR	0x70000000
+#define	RELOC_LABELH	0x80000000
+#define	RELOC_MASK	0xf0000000
+
+#define	NADDR(label)	(RELOC_SOFTC | offsetof(struct ncb, label))
+#define PADDR(label)    (RELOC_LABEL | offsetof(struct script, label))
+#define PADDRH(label)   (RELOC_LABELH | offsetof(struct scripth, label))
+#define	RADDR(label)	(RELOC_REGISTER | REG(label))
+#define	FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
+#define	KVAR(which)	(RELOC_KVAR | (which))
+
+#define	SCRIPT_KVAR_JIFFIES	(0)
+
+#define	SCRIPT_KVAR_FIRST		SCRIPT_KVAR_JIFFIES
+#define	SCRIPT_KVAR_LAST		SCRIPT_KVAR_JIFFIES
+
+/*
+ * Kernel variables referenced in the scripts.
+ * THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
+ */
+static void *script_kvars[] __initdata =
+	{ (void *)&jiffies };
+
+static	struct script script0 __initdata = {
+/*--------------------------< START >-----------------------*/ {
+#if 0
+	/*
+	**	Claim to be still alive ...
+	*/
+	SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)),
+		KVAR(SCRIPT_KVAR_JIFFIES),
+		NADDR (heartbeat),
+#endif
+	/*
+	**      Make data structure address invalid.
+	**      clear SIGP.
+	*/
+	SCR_LOAD_REG (dsa, 0xff),
+		0,
+	SCR_FROM_REG (ctest2),
+		0,
+}/*-------------------------< START0 >----------------------*/,{
+	/*
+	**	Hook for interrupted GetConditionCode.
+	**	Will be patched to ... IFTRUE by
+	**	the interrupt handler.
+	*/
+	SCR_INT ^ IFFALSE (0),
+		SIR_SENSE_RESTART,
+
+}/*-------------------------< START1 >----------------------*/,{
+	/*
+	**	Hook for stalled start queue.
+	**	Will be patched to IFTRUE by the interrupt handler.
+	*/
+	SCR_INT ^ IFFALSE (0),
+		SIR_STALL_RESTART,
+	/*
+	**	Then jump to a certain point in tryloop.
+	**	Due to the lack of indirect addressing the code
+	**	is self modifying here.
+	*/
+	SCR_JUMP,
+}/*-------------------------< STARTPOS >--------------------*/,{
+		PADDRH(tryloop),
+}/*-------------------------< TRYSEL >----------------------*/,{
+	/*
+	**	Now:
+	**	DSA: Address of a Data Structure
+	**	or   Address of the IDLE-Label.
+	**
+	**	TEMP:	Address of a script, which tries to
+	**		start the NEXT entry.
+	**
+	**	Save the TEMP register into the SCRATCHA register.
+	**	Then copy the DSA to TEMP and RETURN.
+	**	This is kind of an indirect jump.
+	**	(The script processor has NO stack, so the
+	**	CALL is actually a jump and link, and the
+	**	RETURN is an indirect jump.)
+	**
+	**	If the slot was empty, DSA contains the address
+	**	of the IDLE part of this script. The processor
+	**	jumps to IDLE and waits for a reselect.
+	**	It will wake up and try the same slot again
+	**	after the SIGP bit becomes set by the host.
+	**
+	**	If the slot was not empty, DSA contains
+	**	the address of the phys-part of a ccb.
+	**	The processor jumps to this address.
+	**	phys starts with head,
+	**	head starts with launch,
+	**	so actually the processor jumps to
+	**	the lauch part.
+	**	If the entry is scheduled for execution,
+	**	then launch contains a jump to SELECT.
+	**	If it's not scheduled, it contains a jump to IDLE.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		RADDR (scratcha),
+	SCR_COPY (4),
+		RADDR (dsa),
+		RADDR (temp),
+	SCR_RETURN,
+		0
+
+}/*-------------------------< SKIP >------------------------*/,{
+	/*
+	**	This entry has been canceled.
+	**	Next time use the next slot.
+	*/
+	SCR_COPY (4),
+		RADDR (scratcha),
+		PADDR (startpos),
+	/*
+	**	patch the launch field.
+	**	should look like an idle process.
+	*/
+	SCR_COPY_F (4),
+		RADDR (dsa),
+		PADDR (skip2),
+	SCR_COPY (8),
+		PADDR (idle),
+}/*-------------------------< SKIP2 >-----------------------*/,{
+		0,
+	SCR_JUMP,
+		PADDR(start),
+}/*-------------------------< IDLE >------------------------*/,{
+	/*
+	**	Nothing to do?
+	**	Wait for reselect.
+	*/
+	SCR_JUMP,
+		PADDR(reselect),
+
+}/*-------------------------< SELECT >----------------------*/,{
+	/*
+	**	DSA	contains the address of a scheduled
+	**		data structure.
+	**
+	**	SCRATCHA contains the address of the script,
+	**		which starts the next entry.
+	**
+	**	Set Initiator mode.
+	**
+	**	(Target mode is left as an exercise for the reader)
+	*/
+
+	SCR_CLR (SCR_TRG),
+		0,
+	SCR_LOAD_REG (HS_REG, 0xff),
+		0,
+
+	/*
+	**      And try to select this target.
+	*/
+	SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
+		PADDR (reselect),
+
+	/*
+	**	Now there are 4 possibilities:
+	**
+	**	(1) The ncr looses arbitration.
+	**	This is ok, because it will try again,
+	**	when the bus becomes idle.
+	**	(But beware of the timeout function!)
+	**
+	**	(2) The ncr is reselected.
+	**	Then the script processor takes the jump
+	**	to the RESELECT label.
+	**
+	**	(3) The ncr completes the selection.
+	**	Then it will execute the next statement.
+	**
+	**	(4) There is a selection timeout.
+	**	Then the ncr should interrupt the host and stop.
+	**	Unfortunately, it seems to continue execution
+	**	of the script. But it will fail with an
+	**	IID-interrupt on the next WHEN.
+	*/
+
+	SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
+		0,
+
+	/*
+	**	Save target id to ctest0 register
+	*/
+
+	SCR_FROM_REG (sdid),
+		0,
+	SCR_TO_REG (ctest0),
+		0,
+	/*
+	**	Send the IDENTIFY and SIMPLE_TAG messages
+	**	(and the M_X_SYNC_REQ message)
+	*/
+	SCR_MOVE_TBL ^ SCR_MSG_OUT,
+		offsetof (struct dsb, smsg),
+#ifdef undef /* XXX better fail than try to deal with this ... */
+	SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
+		-16,
+#endif
+	SCR_CLR (SCR_ATN),
+		0,
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	/*
+	**	Selection complete.
+	**	Next time use the next slot.
+	*/
+	SCR_COPY (4),
+		RADDR (scratcha),
+		PADDR (startpos),
+}/*-------------------------< PREPARE >----------------------*/,{
+	/*
+	**      The ncr doesn't have an indirect load
+	**	or store command. So we have to
+	**	copy part of the control block to a
+	**	fixed place, where we can access it.
+	**
+	**	We patch the address part of a
+	**	COPY command with the DSA-register.
+	*/
+	SCR_COPY_F (4),
+		RADDR (dsa),
+		PADDR (loadpos),
+	/*
+	**	then we do the actual copy.
+	*/
+	SCR_COPY (sizeof (struct head)),
+	/*
+	**	continued after the next label ...
+	*/
+
+}/*-------------------------< LOADPOS >---------------------*/,{
+		0,
+		NADDR (header),
+	/*
+	**      Mark this ccb as not scheduled.
+	*/
+	SCR_COPY (8),
+		PADDR (idle),
+		NADDR (header.launch),
+	/*
+	**      Set a time stamp for this selection
+	*/
+	SCR_COPY (sizeof (u_long)),
+		KVAR(SCRIPT_KVAR_JIFFIES),
+		NADDR (header.stamp.select),
+	/*
+	**      load the savep (saved pointer) into
+	**      the TEMP register (actual pointer)
+	*/
+	SCR_COPY (4),
+		NADDR (header.savep),
+		RADDR (temp),
+	/*
+	**      Initialize the status registers
+	*/
+	SCR_COPY (4),
+		NADDR (header.status),
+		RADDR (scr0),
+
+}/*-------------------------< PREPARE2 >---------------------*/,{
+	/*
+	**      Load the synchronous mode register
+	*/
+	SCR_COPY (1),
+		NADDR (sync_st),
+		RADDR (sxfer),
+	/*
+	**      Load the wide mode and timing register
+	*/
+	SCR_COPY (1),
+		NADDR (wide_st),
+		RADDR (scntl3),
+	/*
+	**	Initialize the msgout buffer with a NOOP message.
+	*/
+	SCR_LOAD_REG (scratcha, M_NOOP),
+		0,
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (msgout),
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (msgin),
+	/*
+	**	Message in phase ?
+	*/
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	Extended or reject message ?
+	*/
+	SCR_FROM_REG (sbdl),
+		0,
+	SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
+		PADDR (msg_in),
+	SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
+		PADDRH (msg_reject),
+	/*
+	**	normal processing
+	*/
+	SCR_JUMP,
+		PADDR (dispatch),
+}/*-------------------------< SETMSG >----------------------*/,{
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (msgout),
+	SCR_SET (SCR_ATN),
+		0,
+}/*-------------------------< CLRACK >----------------------*/,{
+	/*
+	**	Terminate possible pending message phase.
+	*/
+	SCR_CLR (SCR_ACK),
+		0,
+
+}/*-----------------------< DISPATCH >----------------------*/,{
+	SCR_FROM_REG (HS_REG),
+		0,
+	SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
+		SIR_NEGO_FAILED,
+	/*
+	**	remove bogus output signals
+	*/
+	SCR_REG_REG (socl, SCR_AND, CACK|CATN),
+		0,
+	SCR_RETURN ^ IFTRUE (WHEN (SCR_DATA_OUT)),
+		0,
+	/*
+	**	DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
+	**	Possible data corruption during Memory Write and Invalidate.
+	**	This work-around resets the addressing logic prior to the 
+	**	start of the first MOVE of a DATA IN phase.
+	**	(See README.ncr53c8xx for more information)
+	*/
+	SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
+		20,
+	SCR_COPY (4),
+		RADDR (scratcha),
+		RADDR (scratcha),
+	SCR_RETURN,
+		0,
+
+	SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
+		PADDR (msg_out),
+	SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN)),
+		PADDR (msg_in),
+	SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
+		PADDR (command),
+	SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
+		PADDR (status),
+	/*
+	**      Discard one illegal phase byte, if required.
+	*/
+	SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
+		0,
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (xerr_st),
+	SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
+		8,
+	SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
+		NADDR (scratch),
+	SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
+		8,
+	SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
+		NADDR (scratch),
+	SCR_JUMP,
+		PADDR (dispatch),
+
+}/*-------------------------< NO_DATA >--------------------*/,{
+	/*
+	**	The target wants to tranfer too much data
+	**	or in the wrong direction.
+	**      Remember that in extended error.
+	*/
+	SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
+		0,
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (xerr_st),
+	/*
+	**      Discard one data byte, if required.
+	*/
+	SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
+		8,
+	SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
+		NADDR (scratch),
+	SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
+		8,
+	SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
+		NADDR (scratch),
+	/*
+	**      .. and repeat as required.
+	*/
+	SCR_CALL,
+		PADDR (dispatch),
+	SCR_JUMP,
+		PADDR (no_data),
+}/*-------------------------< CHECKATN >--------------------*/,{
+	/*
+	**	If AAP (bit 1 of scntl0 register) is set
+	**	and a parity error is detected,
+	**	the script processor asserts ATN.
+	**
+	**	The target should switch to a MSG_OUT phase
+	**	to get the message.
+	*/
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFFALSE (MASK (CATN, CATN)),
+		PADDR (dispatch),
+	/*
+	**	count it
+	*/
+	SCR_REG_REG (PS_REG, SCR_ADD, 1),
+		0,
+	/*
+	**	Prepare a M_ID_ERROR message
+	**	(initiator detected error).
+	**	The target should retry the transfer.
+	*/
+	SCR_LOAD_REG (scratcha, M_ID_ERROR),
+		0,
+	SCR_JUMP,
+		PADDR (setmsg),
+
+}/*-------------------------< COMMAND >--------------------*/,{
+	/*
+	**	If this is not a GETCC transfer ...
+	*/
+	SCR_FROM_REG (SS_REG),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)),
+		28,
+	/*
+	**	... set a timestamp ...
+	*/
+	SCR_COPY (sizeof (u_long)),
+		KVAR(SCRIPT_KVAR_JIFFIES),
+		NADDR (header.stamp.command),
+	/*
+	**	... and send the command
+	*/
+	SCR_MOVE_TBL ^ SCR_COMMAND,
+		offsetof (struct dsb, cmd),
+	SCR_JUMP,
+		PADDR (dispatch),
+	/*
+	**	Send the GETCC command
+	*/
+/*>>>*/	SCR_MOVE_TBL ^ SCR_COMMAND,
+		offsetof (struct dsb, scmd),
+	SCR_JUMP,
+		PADDR (dispatch),
+
+}/*-------------------------< STATUS >--------------------*/,{
+	/*
+	**	set the timestamp.
+	*/
+	SCR_COPY (sizeof (u_long)),
+		KVAR(SCRIPT_KVAR_JIFFIES),
+		NADDR (header.stamp.status),
+	/*
+	**	If this is a GETCC transfer,
+	*/
+	SCR_FROM_REG (SS_REG),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)),
+		40,
+	/*
+	**	get the status
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_STATUS,
+		NADDR (scratch),
+	/*
+	**	Save status to scsi_status.
+	**	Mark as complete.
+	**	And wait for disconnect.
+	*/
+	SCR_TO_REG (SS_REG),
+		0,
+	SCR_REG_REG (SS_REG, SCR_OR, S_SENSE),
+		0,
+	SCR_LOAD_REG (HS_REG, HS_COMPLETE),
+		0,
+	SCR_JUMP,
+		PADDR (checkatn),
+	/*
+	**	If it was no GETCC transfer,
+	**	save the status to scsi_status.
+	*/
+/*>>>*/	SCR_MOVE_ABS (1) ^ SCR_STATUS,
+		NADDR (scratch),
+	SCR_TO_REG (SS_REG),
+		0,
+	/*
+	**	if it was no check condition ...
+	*/
+	SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
+		PADDR (checkatn),
+	/*
+	**	... mark as complete.
+	*/
+	SCR_LOAD_REG (HS_REG, HS_COMPLETE),
+		0,
+	SCR_JUMP,
+		PADDR (checkatn),
+
+}/*-------------------------< MSG_IN >--------------------*/,{
+	/*
+	**	Get the first byte of the message
+	**	and save it to SCRATCHA.
+	**
+	**	The script processor doesn't negate the
+	**	ACK signal after this transfer.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[0]),
+	/*
+	**	Check for message parity error.
+	*/
+	SCR_TO_REG (scratcha),
+		0,
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	SCR_FROM_REG (scratcha),
+		0,
+	/*
+	**	Parity was ok, handle this message.
+	*/
+	SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
+		PADDR (complete),
+	SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
+		PADDR (save_dp),
+	SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
+		PADDR (restore_dp),
+	SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
+		PADDR (disconnect),
+	SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
+		PADDRH (msg_extended),
+	SCR_JUMP ^ IFTRUE (DATA (M_NOOP)),
+		PADDR (clrack),
+	SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
+		PADDRH (msg_reject),
+	SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)),
+		PADDRH (msg_ign_residue),
+	/*
+	**	Rest of the messages left as
+	**	an exercise ...
+	**
+	**	Unimplemented messages:
+	**	fall through to MSG_BAD.
+	*/
+}/*-------------------------< MSG_BAD >------------------*/,{
+	/*
+	**	unimplemented message - reject it.
+	*/
+	SCR_INT,
+		SIR_REJECT_SENT,
+	SCR_LOAD_REG (scratcha, M_REJECT),
+		0,
+	SCR_JUMP,
+		PADDR (setmsg),
+
+}/*-------------------------< COMPLETE >-----------------*/,{
+	/*
+	**	Complete message.
+	**
+	**	If it's not the get condition code,
+	**	copy TEMP register to LASTP in header.
+	*/
+	SCR_FROM_REG (SS_REG),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFTRUE (MASK (S_SENSE, S_SENSE)),
+		12,
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR (header.lastp),
+/*>>>*/	/*
+	**	When we terminate the cycle by clearing ACK,
+	**	the target may disconnect immediately.
+	**
+	**	We don't want to be told of an
+	**	"unexpected disconnect",
+	**	so we disable this feature.
+	*/
+	SCR_REG_REG (scntl2, SCR_AND, 0x7f),
+		0,
+	/*
+	**	Terminate cycle ...
+	*/
+	SCR_CLR (SCR_ACK|SCR_ATN),
+		0,
+	/*
+	**	... and wait for the disconnect.
+	*/
+	SCR_WAIT_DISC,
+		0,
+}/*-------------------------< CLEANUP >-------------------*/,{
+	/*
+	**      dsa:    Pointer to ccb
+	**	      or xxxxxxFF (no ccb)
+	**
+	**      HS_REG:   Host-Status (<>0!)
+	*/
+	SCR_FROM_REG (dsa),
+		0,
+	SCR_JUMP ^ IFTRUE (DATA (0xff)),
+		PADDR (signal),
+	/*
+	**      dsa is valid.
+	**	save the status registers
+	*/
+	SCR_COPY (4),
+		RADDR (scr0),
+		NADDR (header.status),
+	/*
+	**	and copy back the header to the ccb.
+	*/
+	SCR_COPY_F (4),
+		RADDR (dsa),
+		PADDR (cleanup0),
+	SCR_COPY (sizeof (struct head)),
+		NADDR (header),
+}/*-------------------------< CLEANUP0 >--------------------*/,{
+		0,
+
+	/*
+	**	If command resulted in "check condition"
+	**	status and is not yet completed,
+	**	try to get the condition code.
+	*/
+	SCR_FROM_REG (HS_REG),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
+		16,
+	SCR_FROM_REG (SS_REG),
+		0,
+	SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
+		PADDRH(getcc2),
+	/*
+	**	And make the DSA register invalid.
+	*/
+/*>>>*/	SCR_LOAD_REG (dsa, 0xff), /* invalid */
+		0,
+}/*-------------------------< SIGNAL >----------------------*/,{
+	/*
+	**	if status = queue full,
+	**	reinsert in startqueue and stall queue.
+	*/
+	SCR_FROM_REG (SS_REG),
+		0,
+	SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
+		SIR_STALL_QUEUE,
+	/*
+	**	if job completed ...
+	*/
+	SCR_FROM_REG (HS_REG),
+		0,
+	/*
+	**	... signal completion to the host
+	*/
+	SCR_INT_FLY ^ IFFALSE (MASK (0, HS_DONEMASK)),
+		0,
+	/*
+	**	Auf zu neuen Schandtaten!
+	*/
+	SCR_JUMP,
+		PADDR(start),
+
+}/*-------------------------< SAVE_DP >------------------*/,{
+	/*
+	**	SAVE_DP message:
+	**	Copy TEMP register to SAVEP in header.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR (header.savep),
+	SCR_JUMP,
+		PADDR (clrack),
+}/*-------------------------< RESTORE_DP >---------------*/,{
+	/*
+	**	RESTORE_DP message:
+	**	Copy SAVEP in header to TEMP register.
+	*/
+	SCR_COPY (4),
+		NADDR (header.savep),
+		RADDR (temp),
+	SCR_JUMP,
+		PADDR (clrack),
+
+}/*-------------------------< DISCONNECT >---------------*/,{
+	/*
+	**	If QUIRK_AUTOSAVE is set,
+	**	do an "save pointer" operation.
+	*/
+	SCR_FROM_REG (QU_REG),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)),
+		12,
+	/*
+	**	like SAVE_DP message:
+	**	Copy TEMP register to SAVEP in header.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR (header.savep),
+/*>>>*/	/*
+	**	Check if temp==savep or temp==goalp:
+	**	if not, log a missing save pointer message.
+	**	In fact, it's a comparison mod 256.
+	**
+	**	Hmmm, I hadn't thought that I would be urged to
+	**	write this kind of ugly self modifying code.
+	**
+	**	It's unbelievable, but the ncr53c8xx isn't able
+	**	to subtract one register from another.
+	*/
+	SCR_FROM_REG (temp),
+		0,
+	/*
+	**	You are not expected to understand this ..
+	**
+	**	CAUTION: only little endian architectures supported! XXX
+	*/
+	SCR_COPY_F (1),
+		NADDR (header.savep),
+		PADDR (disconnect0),
+}/*-------------------------< DISCONNECT0 >--------------*/,{
+/*<<<*/	SCR_JUMPR ^ IFTRUE (DATA (1)),
+		20,
+	/*
+	**	neither this
+	*/
+	SCR_COPY_F (1),
+		NADDR (header.goalp),
+		PADDR (disconnect1),
+}/*-------------------------< DISCONNECT1 >--------------*/,{
+	SCR_INT ^ IFFALSE (DATA (1)),
+		SIR_MISSING_SAVE,
+/*>>>*/
+
+	/*
+	**	DISCONNECTing  ...
+	**
+	**	disable the "unexpected disconnect" feature,
+	**	and remove the ACK signal.
+	*/
+	SCR_REG_REG (scntl2, SCR_AND, 0x7f),
+		0,
+	SCR_CLR (SCR_ACK|SCR_ATN),
+		0,
+	/*
+	**	Wait for the disconnect.
+	*/
+	SCR_WAIT_DISC,
+		0,
+	/*
+	**	Profiling:
+	**	Set a time stamp,
+	**	and count the disconnects.
+	*/
+	SCR_COPY (sizeof (u_long)),
+		KVAR(SCRIPT_KVAR_JIFFIES),
+		NADDR (header.stamp.disconnect),
+	SCR_COPY (4),
+		NADDR (disc_phys),
+		RADDR (temp),
+	SCR_REG_REG (temp, SCR_ADD, 0x01),
+		0,
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR (disc_phys),
+	/*
+	**	Status is: DISCONNECTED.
+	*/
+	SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
+		0,
+	SCR_JUMP,
+		PADDR (cleanup),
+
+}/*-------------------------< MSG_OUT >-------------------*/,{
+	/*
+	**	The target requests a message.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
+		NADDR (msgout),
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	/*
+	**	If it was no ABORT message ...
+	*/
+	SCR_JUMP ^ IFTRUE (DATA (M_ABORT)),
+		PADDRH (msg_out_abort),
+	/*
+	**	... wait for the next phase
+	**	if it's a message out, send it again, ...
+	*/
+	SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
+		PADDR (msg_out),
+}/*-------------------------< MSG_OUT_DONE >--------------*/,{
+	/*
+	**	... else clear the message ...
+	*/
+	SCR_LOAD_REG (scratcha, M_NOOP),
+		0,
+	SCR_COPY (4),
+		RADDR (scratcha),
+		NADDR (msgout),
+	/*
+	**	... and process the next phase
+	*/
+	SCR_JUMP,
+		PADDR (dispatch),
+}/*------------------------< BADGETCC >---------------------*/,{
+	/*
+	**	If SIGP was set, clear it and try again.
+	*/
+	SCR_FROM_REG (ctest2),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
+		PADDRH (getcc2),
+	SCR_INT,
+		SIR_SENSE_FAILED,
+}/*-------------------------< RESELECT >--------------------*/,{
+	/*
+	**	This NOP will be patched with LED OFF
+	**	SCR_REG_REG (gpreg, SCR_OR, 0x01)
+	*/
+	SCR_NO_OP,
+		0,
+	/*
+	**	make the DSA invalid.
+	*/
+	SCR_LOAD_REG (dsa, 0xff),
+		0,
+	SCR_CLR (SCR_TRG),
+		0,
+	/*
+	**	Sleep waiting for a reselection.
+	**	If SIGP is set, special treatment.
+	**
+	**	Zu allem bereit ..
+	*/
+	SCR_WAIT_RESEL,
+		PADDR(reselect2),
+}/*-------------------------< RESELECT1 >--------------------*/,{
+	/*
+	**	This NOP will be patched with LED ON
+	**	SCR_REG_REG (gpreg, SCR_AND, 0xfe)
+	*/
+	SCR_NO_OP,
+		0,
+	/*
+	**	... zu nichts zu gebrauchen ?
+	**
+	**      load the target id into the SFBR
+	**	and jump to the control block.
+	**
+	**	Look at the declarations of
+	**	- struct ncb
+	**	- struct tcb
+	**	- struct lcb
+	**	- struct ccb
+	**	to understand what's going on.
+	*/
+	SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
+		0,
+	SCR_TO_REG (ctest0),
+		0,
+	SCR_JUMP,
+		NADDR (jump_tcb),
+}/*-------------------------< RESELECT2 >-------------------*/,{
+	/*
+	**	This NOP will be patched with LED ON
+	**	SCR_REG_REG (gpreg, SCR_AND, 0xfe)
+	*/
+	SCR_NO_OP,
+		0,
+	/*
+	**	If it's not connected :(
+	**	-> interrupted by SIGP bit.
+	**	Jump to start.
+	*/
+	SCR_FROM_REG (ctest2),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
+		PADDR (start),
+	SCR_JUMP,
+		PADDR (reselect),
+
+}/*-------------------------< RESEL_TMP >-------------------*/,{
+	/*
+	**	The return address in TEMP
+	**	is in fact the data structure address,
+	**	so copy it to the DSA register.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		RADDR (dsa),
+	SCR_JUMP,
+		PADDR (prepare),
+
+}/*-------------------------< RESEL_LUN >-------------------*/,{
+	/*
+	**	come back to this point
+	**	to get an IDENTIFY message
+	**	Wait for a msg_in phase.
+	*/
+/*<<<*/	SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		48,
+	/*
+	**	message phase
+	**	It's not a sony, it's a trick:
+	**	read the data without acknowledging it.
+	*/
+	SCR_FROM_REG (sbdl),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)),
+		32,
+	/*
+	**	It WAS an Identify message.
+	**	get it and ack it!
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin),
+	SCR_CLR (SCR_ACK),
+		0,
+	/*
+	**	Mask out the lun.
+	*/
+	SCR_REG_REG (sfbr, SCR_AND, 0x07),
+		0,
+	SCR_RETURN,
+		0,
+	/*
+	**	No message phase or no IDENTIFY message:
+	**	return 0.
+	*/
+/*>>>*/	SCR_LOAD_SFBR (0),
+		0,
+	SCR_RETURN,
+		0,
+
+}/*-------------------------< RESEL_TAG >-------------------*/,{
+	/*
+	**	come back to this point
+	**	to get a SIMPLE_TAG message
+	**	Wait for a MSG_IN phase.
+	*/
+/*<<<*/	SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		64,
+	/*
+	**	message phase
+	**	It's a trick - read the data
+	**	without acknowledging it.
+	*/
+	SCR_FROM_REG (sbdl),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)),
+		48,
+	/*
+	**	It WAS a SIMPLE_TAG message.
+	**	get it and ack it!
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin),
+	SCR_CLR (SCR_ACK),
+		0,
+	/*
+	**	Wait for the second byte (the tag)
+	*/
+/*<<<*/	SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		24,
+	/*
+	**	Get it and ack it!
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin),
+	SCR_CLR (SCR_ACK|SCR_CARRY),
+		0,
+	SCR_RETURN,
+		0,
+	/*
+	**	No message phase or no SIMPLE_TAG message
+	**	or no second byte: return 0.
+	*/
+/*>>>*/	SCR_LOAD_SFBR (0),
+		0,
+	SCR_SET (SCR_CARRY),
+		0,
+	SCR_RETURN,
+		0,
+
+}/*-------------------------< DATA_IO >--------------------*/,{
+/*
+**	Because Linux does not provide xfer data direction 
+**	to low-level scsi drivers, we must trust the target 
+**	for actual data direction when we cannot guess it.
+**	The programmed interrupt patches savep, lastp, goalp,
+**	etc.., and restarts the scsi script at data_out/in.
+*/
+	SCR_INT ^ IFTRUE (WHEN (SCR_DATA_OUT)),
+		SIR_DATA_IO_IS_OUT,
+	SCR_INT ^ IFTRUE (WHEN (SCR_DATA_IN)),
+		SIR_DATA_IO_IS_IN,
+	SCR_JUMP,
+		PADDR (no_data),
+
+}/*-------------------------< DATA_IN >--------------------*/,{
+/*
+**	Because the size depends on the
+**	#define MAX_SCATTER parameter,
+**	it is filled in at runtime.
+**
+**  ##===========< i=0; i<MAX_SCATTER >=========
+**  ||	SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
+**  ||		PADDR (checkatn),
+**  ||	SCR_MOVE_TBL ^ SCR_DATA_IN,
+**  ||		offsetof (struct dsb, data[ i]),
+**  ##==========================================
+**
+**	SCR_CALL,
+**		PADDR (checkatn),
+**	SCR_JUMP,
+**		PADDR (no_data),
+*/
+0
+}/*--------------------------------------------------------*/
+};
+
+static	struct scripth scripth0 __initdata = {
+/*-------------------------< TRYLOOP >---------------------*/{
+/*
+**	Load an entry of the start queue into dsa
+**	and try to start it by jumping to TRYSEL.
+**
+**	Because the size depends on the
+**	#define MAX_START parameter, it is filled
+**	in at runtime.
+**
+**-----------------------------------------------------------
+**
+**  ##===========< I=0; i<MAX_START >===========
+**  ||	SCR_COPY (4),
+**  ||		NADDR (squeue[i]),
+**  ||		RADDR (dsa),
+**  ||	SCR_CALL,
+**  ||		PADDR (trysel),
+**  ##==========================================
+**
+**	SCR_JUMP,
+**		PADDRH(tryloop),
+**
+**-----------------------------------------------------------
+*/
+0
+},/*-------------------------< MSG_PARITY >---------------*/{
+	/*
+	**	count it
+	*/
+	SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
+		0,
+	/*
+	**	send a "message parity error" message.
+	*/
+	SCR_LOAD_REG (scratcha, M_PARITY),
+		0,
+	SCR_JUMP,
+		PADDR (setmsg),
+}/*-------------------------< MSG_REJECT >---------------*/,{
+	/*
+	**	If a negotiation was in progress,
+	**	negotiation failed.
+	*/
+	SCR_FROM_REG (HS_REG),
+		0,
+	SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
+		SIR_NEGO_FAILED,
+	/*
+	**	else make host log this message
+	*/
+	SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
+		SIR_REJECT_RECEIVED,
+	SCR_JUMP,
+		PADDR (clrack),
+
+}/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
+	/*
+	**	Terminate cycle
+	*/
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get residue size.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[1]),
+	/*
+	**	Check for message parity error.
+	*/
+	SCR_TO_REG (scratcha),
+		0,
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	SCR_FROM_REG (scratcha),
+		0,
+	/*
+	**	Size is 0 .. ignore message.
+	*/
+	SCR_JUMP ^ IFTRUE (DATA (0)),
+		PADDR (clrack),
+	/*
+	**	Size is not 1 .. have to interrupt.
+	*/
+/*<<<*/	SCR_JUMPR ^ IFFALSE (DATA (1)),
+		40,
+	/*
+	**	Check for residue byte in swide register
+	*/
+	SCR_FROM_REG (scntl2),
+		0,
+/*<<<*/	SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
+		16,
+	/*
+	**	There IS data in the swide register.
+	**	Discard it.
+	*/
+	SCR_REG_REG (scntl2, SCR_OR, WSR),
+		0,
+	SCR_JUMP,
+		PADDR (clrack),
+	/*
+	**	Load again the size to the sfbr register.
+	*/
+/*>>>*/	SCR_FROM_REG (scratcha),
+		0,
+/*>>>*/	SCR_INT,
+		SIR_IGN_RESIDUE,
+	SCR_JUMP,
+		PADDR (clrack),
+
+}/*-------------------------< MSG_EXTENDED >-------------*/,{
+	/*
+	**	Terminate cycle
+	*/
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get length.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[1]),
+	/*
+	**	Check for message parity error.
+	*/
+	SCR_TO_REG (scratcha),
+		0,
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	SCR_FROM_REG (scratcha),
+		0,
+	/*
+	*/
+	SCR_JUMP ^ IFTRUE (DATA (3)),
+		PADDRH (msg_ext_3),
+	SCR_JUMP ^ IFFALSE (DATA (2)),
+		PADDR (msg_bad),
+}/*-------------------------< MSG_EXT_2 >----------------*/,{
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get extended message code.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[2]),
+	/*
+	**	Check for message parity error.
+	*/
+	SCR_TO_REG (scratcha),
+		0,
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	SCR_FROM_REG (scratcha),
+		0,
+	SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)),
+		PADDRH (msg_wdtr),
+	/*
+	**	unknown extended message
+	*/
+	SCR_JUMP,
+		PADDR (msg_bad)
+}/*-------------------------< MSG_WDTR >-----------------*/,{
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get data bus width
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[3]),
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	/*
+	**	let the host do the real work.
+	*/
+	SCR_INT,
+		SIR_NEGO_WIDE,
+	/*
+	**	let the target fetch our answer.
+	*/
+	SCR_SET (SCR_ATN),
+		0,
+	SCR_CLR (SCR_ACK),
+		0,
+
+	SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
+		SIR_NEGO_PROTO,
+	/*
+	**	Send the M_X_WIDE_REQ
+	*/
+	SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
+		NADDR (msgout),
+	SCR_CLR (SCR_ATN),
+		0,
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	SCR_JUMP,
+		PADDR (msg_out_done),
+
+}/*-------------------------< MSG_EXT_3 >----------------*/,{
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get extended message code.
+	*/
+	SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
+		NADDR (msgin[2]),
+	/*
+	**	Check for message parity error.
+	*/
+	SCR_TO_REG (scratcha),
+		0,
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	SCR_FROM_REG (scratcha),
+		0,
+	SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)),
+		PADDRH (msg_sdtr),
+	/*
+	**	unknown extended message
+	*/
+	SCR_JUMP,
+		PADDR (msg_bad)
+
+}/*-------------------------< MSG_SDTR >-----------------*/,{
+	SCR_CLR (SCR_ACK),
+		0,
+	SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
+		PADDR (dispatch),
+	/*
+	**	get period and offset
+	*/
+	SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
+		NADDR (msgin[3]),
+	SCR_FROM_REG (socl),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
+		PADDRH (msg_parity),
+	/*
+	**	let the host do the real work.
+	*/
+	SCR_INT,
+		SIR_NEGO_SYNC,
+	/*
+	**	let the target fetch our answer.
+	*/
+	SCR_SET (SCR_ATN),
+		0,
+	SCR_CLR (SCR_ACK),
+		0,
+
+	SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
+		SIR_NEGO_PROTO,
+	/*
+	**	Send the M_X_SYNC_REQ
+	*/
+	SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
+		NADDR (msgout),
+	SCR_CLR (SCR_ATN),
+		0,
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	SCR_JUMP,
+		PADDR (msg_out_done),
+
+}/*-------------------------< MSG_OUT_ABORT >-------------*/,{
+	/*
+	**	After ABORT message,
+	**
+	**	expect an immediate disconnect, ...
+	*/
+	SCR_REG_REG (scntl2, SCR_AND, 0x7f),
+		0,
+	SCR_CLR (SCR_ACK|SCR_ATN),
+		0,
+	SCR_WAIT_DISC,
+		0,
+	/*
+	**	... and set the status to "ABORTED"
+	*/
+	SCR_LOAD_REG (HS_REG, HS_ABORTED),
+		0,
+	SCR_JUMP,
+		PADDR (cleanup),
+
+}/*-------------------------< GETCC >-----------------------*/,{
+	/*
+	**	The ncr doesn't have an indirect load
+	**	or store command. So we have to
+	**	copy part of the control block to a
+	**	fixed place, where we can modify it.
+	**
+	**	We patch the address part of a COPY command
+	**	with the address of the dsa register ...
+	*/
+	SCR_COPY_F (4),
+		RADDR (dsa),
+		PADDRH (getcc1),
+	/*
+	**	... then we do the actual copy.
+	*/
+	SCR_COPY (sizeof (struct head)),
+}/*-------------------------< GETCC1 >----------------------*/,{
+		0,
+		NADDR (header),
+	/*
+	**	Initialize the status registers
+	*/
+	SCR_COPY (4),
+		NADDR (header.status),
+		RADDR (scr0),
+}/*-------------------------< GETCC2 >----------------------*/,{
+	/*
+	**	Get the condition code from a target.
+	**
+	**	DSA points to a data structure.
+	**	Set TEMP to the script location
+	**	that receives the condition code.
+	**
+	**	Because there is no script command
+	**	to load a longword into a register,
+	**	we use a CALL command.
+	*/
+/*<<<*/	SCR_CALLR,
+		24,
+	/*
+	**	Get the condition code.
+	*/
+	SCR_MOVE_TBL ^ SCR_DATA_IN,
+		offsetof (struct dsb, sense),
+	/*
+	**	No data phase may follow!
+	*/
+	SCR_CALL,
+		PADDR (checkatn),
+	SCR_JUMP,
+		PADDR (no_data),
+/*>>>*/
+
+	/*
+	**	The CALL jumps to this point.
+	**	Prepare for a RESTORE_POINTER message.
+	**	Save the TEMP register into the saved pointer.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR (header.savep),
+	/*
+	**	Load scratcha, because in case of a selection timeout,
+	**	the host will expect a new value for startpos in
+	**	the scratcha register.
+	*/
+	SCR_COPY (4),
+		PADDR (startpos),
+		RADDR (scratcha),
+#ifdef NCR_GETCC_WITHMSG
+	/*
+	**	If QUIRK_NOMSG is set, select without ATN.
+	**	and don't send a message.
+	*/
+	SCR_FROM_REG (QU_REG),
+		0,
+	SCR_JUMP ^ IFTRUE (MASK (QUIRK_NOMSG, QUIRK_NOMSG)),
+		PADDRH(getcc3),
+	/*
+	**	Then try to connect to the target.
+	**	If we are reselected, special treatment
+	**	of the current job is required before
+	**	accepting the reselection.
+	*/
+	SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
+		PADDR(badgetcc),
+	/*
+	**	save target id.
+	*/
+	SCR_FROM_REG (sdid),
+		0,
+	SCR_TO_REG (ctest0),
+		0,
+	/*
+	**	Send the IDENTIFY message.
+	**	In case of short transfer, remove ATN.
+	*/
+	SCR_MOVE_TBL ^ SCR_MSG_OUT,
+		offsetof (struct dsb, smsg2),
+	SCR_CLR (SCR_ATN),
+		0,
+	/*
+	**	save the first byte of the message.
+	*/
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	SCR_JUMP,
+		PADDR (prepare2),
+
+#endif
+}/*-------------------------< GETCC3 >----------------------*/,{
+	/*
+	**	Try to connect to the target.
+	**	If we are reselected, special treatment
+	**	of the current job is required before
+	**	accepting the reselection.
+	**
+	**	Silly target won't accept a message.
+	**	Select without ATN.
+	*/
+	SCR_SEL_TBL ^ offsetof (struct dsb, select),
+		PADDR(badgetcc),
+	/*
+	**	save target id.
+	*/
+	SCR_FROM_REG (sdid),
+		0,
+	SCR_TO_REG (ctest0),
+		0,
+	/*
+	**	Force error if selection timeout
+	*/
+	SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
+		0,
+	/*
+	**	don't negotiate.
+	*/
+	SCR_JUMP,
+		PADDR (prepare2),
+
+}/*-------------------------< DATA_OUT >-------------------*/,{
+/*
+**	Because the size depends on the
+**	#define MAX_SCATTER parameter,
+**	it is filled in at runtime.
+**
+**  ##===========< i=0; i<MAX_SCATTER >=========
+**  ||	SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
+**  ||		PADDR (dispatch),
+**  ||	SCR_MOVE_TBL ^ SCR_DATA_OUT,
+**  ||		offsetof (struct dsb, data[ i]),
+**  ##==========================================
+**
+**	SCR_CALL,
+**		PADDR (dispatch),
+**	SCR_JUMP,
+**		PADDR (no_data),
+**
+**---------------------------------------------------------
+*/
+0
+}/*-------------------------< ABORTTAG >-------------------*/,{
+	/*
+	**      Abort a bad reselection.
+	**	Set the message to ABORT vs. ABORT_TAG
+	*/
+	SCR_LOAD_REG (scratcha, M_ABORT_TAG),
+		0,
+	SCR_JUMPR ^ IFFALSE (CARRYSET),
+		8,
+}/*-------------------------< ABORT >----------------------*/,{
+	SCR_LOAD_REG (scratcha, M_ABORT),
+		0,
+	SCR_COPY (1),
+		RADDR (scratcha),
+		NADDR (msgout),
+	SCR_SET (SCR_ATN),
+		0,
+	SCR_CLR (SCR_ACK),
+		0,
+	/*
+	**	and send it.
+	**	we expect an immediate disconnect
+	*/
+	SCR_REG_REG (scntl2, SCR_AND, 0x7f),
+		0,
+	SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
+		NADDR (msgout),
+	SCR_COPY (1),
+		RADDR (sfbr),
+		NADDR (lastmsg),
+	SCR_CLR (SCR_ACK|SCR_ATN),
+		0,
+	SCR_WAIT_DISC,
+		0,
+	SCR_JUMP,
+		PADDR (start),
+}/*-------------------------< SNOOPTEST >-------------------*/,{
+	/*
+	**	Read the variable.
+	*/
+	SCR_COPY (4),
+		NADDR(ncr_cache),
+		RADDR (scratcha),
+	/*
+	**	Write the variable.
+	*/
+	SCR_COPY (4),
+		RADDR (temp),
+		NADDR(ncr_cache),
+	/*
+	**	Read back the variable.
+	*/
+	SCR_COPY (4),
+		NADDR(ncr_cache),
+		RADDR (temp),
+}/*-------------------------< SNOOPEND >-------------------*/,{
+	/*
+	**	And stop.
+	*/
+	SCR_INT,
+		99,
+}/*--------------------------------------------------------*/
+};
+
+/*==========================================================
+**
+**
+**	Fill in #define dependent parts of the script
+**
+**
+**==========================================================
+*/
+
+__initfunc(
+void ncr_script_fill (struct script * scr, struct scripth * scrh)
+)
+{
+	int	i;
+	ncrcmd	*p;
+
+	p = scrh->tryloop;
+	for (i=0; i<MAX_START; i++) {
+		*p++ =SCR_COPY (4);
+		*p++ =NADDR (squeue[i]);
+		*p++ =RADDR (dsa);
+		*p++ =SCR_CALL;
+		*p++ =PADDR (trysel);
+	};
+	*p++ =SCR_JUMP;
+	*p++ =PADDRH(tryloop);
+
+	assert ((u_long)p == (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
+
+	p = scr->data_in;
+
+	for (i=0; i<MAX_SCATTER; i++) {
+		*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
+		*p++ =PADDR (checkatn);
+		*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
+		*p++ =offsetof (struct dsb, data[i]);
+	};
+
+	*p++ =SCR_CALL;
+	*p++ =PADDR (checkatn);
+	*p++ =SCR_JUMP;
+	*p++ =PADDR (no_data);
+
+	assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in));
+
+	p = scrh->data_out;
+
+	for (i=0; i<MAX_SCATTER; i++) {
+		*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
+		*p++ =PADDR (dispatch);
+		*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
+		*p++ =offsetof (struct dsb, data[i]);
+	};
+
+	*p++ =SCR_CALL;
+	*p++ =PADDR (dispatch);
+	*p++ =SCR_JUMP;
+	*p++ =PADDR (no_data);
+
+	assert ((u_long)p == (u_long)&scrh->data_out + sizeof (scrh->data_out));
+}
+
+/*==========================================================
+**
+**
+**	Copy and rebind a script.
+**
+**
+**==========================================================
+*/
+
+__initfunc(
+static void ncr_script_copy_and_bind (ncb_p np, ncrcmd *src, ncrcmd *dst, int len)
+)
+{
+	ncrcmd  opcode, new, old, tmp1, tmp2;
+	ncrcmd	*start, *end;
+	int relocs;
+	int opchanged = 0;
+
+	start = src;
+	end = src + len/4;
+
+	while (src < end) {
+
+		opcode = *src++;
+		*dst++ = cpu_to_scr(opcode);
+
+		/*
+		**	If we forget to change the length
+		**	in struct script, a field will be
+		**	padded with 0. This is an illegal
+		**	command.
+		*/
+
+		if (opcode == 0) {
+			printf ("%s: ERROR0 IN SCRIPT at %d.\n",
+				ncr_name(np), (int) (src-start-1));
+			DELAY (1000000);
+		};
+
+		if (DEBUG_FLAGS & DEBUG_SCRIPT)
+			printf ("%p:  <%x>\n",
+				(src-1), (unsigned)opcode);
+
+		/*
+		**	We don't have to decode ALL commands
+		*/
+		switch (opcode >> 28) {
+
+		case 0xc:
+			/*
+			**	COPY has TWO arguments.
+			*/
+			relocs = 2;
+			tmp1 = src[0];
+			if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
+				tmp1 = 0;
+			tmp2 = src[1];
+			if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
+				tmp2 = 0;
+			if ((tmp1 ^ tmp2) & 3) {
+				printf ("%s: ERROR1 IN SCRIPT at %d.\n",
+					ncr_name(np), (int) (src-start-1));
+				DELAY (1000000);
+			}
+			/*
+			**	If PREFETCH feature not enabled, remove 
+			**	the NO FLUSH bit if present.
+			*/
+			if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
+				dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
+				++opchanged;
+			}
+			break;
+
+		case 0x0:
+			/*
+			**	MOVE (absolute address)
+			*/
+			relocs = 1;
+			break;
+
+		case 0x8:
+			/*
+			**	JUMP / CALL
+			**	don't relocate if relative :-)
+			*/
+			if (opcode & 0x00800000)
+				relocs = 0;
+			else
+				relocs = 1;
+			break;
+
+		case 0x4:
+		case 0x5:
+		case 0x6:
+		case 0x7:
+			relocs = 1;
+			break;
+
+		default:
+			relocs = 0;
+			break;
+		};
+
+		if (relocs) {
+			while (relocs--) {
+				old = *src++;
+
+				switch (old & RELOC_MASK) {
+				case RELOC_REGISTER:
+					new = (old & ~RELOC_MASK) + np->paddr;
+					break;
+				case RELOC_LABEL:
+					new = (old & ~RELOC_MASK) + np->p_script;
+					break;
+				case RELOC_LABELH:
+					new = (old & ~RELOC_MASK) + np->p_scripth;
+					break;
+				case RELOC_SOFTC:
+					new = (old & ~RELOC_MASK) + vtophys(np);
+					break;
+				case RELOC_KVAR:
+					if (((old & ~RELOC_MASK) <
+					     SCRIPT_KVAR_FIRST) ||
+					    ((old & ~RELOC_MASK) >
+					     SCRIPT_KVAR_LAST))
+						panic("ncr KVAR out of range");
+					new = vtophys(script_kvars[old &
+					    ~RELOC_MASK]);
+					break;
+				case 0:
+					/* Don't relocate a 0 address. */
+					if (old == 0) {
+						new = old;
+						break;
+					}
+					/* fall through */
+				default:
+					panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
+					break;
+				}
+
+				*dst++ = cpu_to_scr(new);
+			}
+		} else
+			*dst++ = cpu_to_scr(*src++);
+
+	};
+	if (bootverbose > 1 && opchanged)
+		printf("%s: NO FLUSH bit removed from %d script instructions\n",
+			ncr_name(np), opchanged); 
+}
+
+/*==========================================================
+**
+**
+**      Auto configuration:  attach and init a host adapter.
+**
+**
+**==========================================================
+*/
+
+/*
+**	Linux host data structure
+**
+**	The script area is allocated in the host data structure
+**	because kmalloc() returns NULL during scsi initialisations
+**	with Linux 1.2.X
+*/
+
+struct host_data {
+     struct ncb *ncb;
+
+     char ncb_align[NCB_ALIGN_SIZE-1];	/* Filler for alignment */
+     struct ncb _ncb_data;
+
+     char ccb_align[CCB_ALIGN_SIZE-1];	/* Filler for alignment */
+     struct ccb _ccb_data;
+
+     char scr_align[SCR_ALIGN_SIZE-1];	/* Filler for alignment */
+     struct script script_data;
+
+     struct scripth scripth_data;
+};
+
+/*
+**	Print something which allow to retrieve the controler type, unit,
+**	target, lun concerned by a kernel message.
+*/
+
+#define PRINT_LUN(np, target, lun) \
+printf(KERN_INFO "%s-<%d,%d>: ", ncr_name(np), (int) (target), (int) (lun))
+
+static void PRINT_ADDR(Scsi_Cmnd *cmd)
+{
+	struct host_data *host_data = (struct host_data *) cmd->host->hostdata;
+	ncb_p np                    = host_data->ncb;
+	if (np) PRINT_LUN(np, cmd->target, cmd->lun);
+}
+
+/*==========================================================
+**
+**	NCR chip clock divisor table.
+**	Divisors are multiplied by 10,000,000 in order to make 
+**	calculations more simple.
+**
+**==========================================================
+*/
+
+#define _5M 5000000
+static u_long div_10M[] =
+	{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
+
+
+/*===============================================================
+**
+**	Prepare io register values used by ncr_init() according 
+**	to selected and supported features.
+**
+**	NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128 
+**	transfers. 32,64,128 are only supported by 875 and 895 chips.
+**	We use log base 2 (burst length) as internal code, with 
+**	value 0 meaning "burst disabled".
+**
+**===============================================================
+*/
+
+/*
+ *	Burst length from burst code.
+ */
+#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
+
+/*
+ *	Burst code from io register bits.
+ */
+#define burst_code(dmode, ctest4, ctest5) \
+	(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
+
+/*
+ *	Set initial io register bits from burst code.
+ */
+static inline void ncr_init_burst(ncb_p np, u_char bc)
+{
+	np->rv_ctest4	&= ~0x80;
+	np->rv_dmode	&= ~(0x3 << 6);
+	np->rv_ctest5	&= ~0x4;
+
+	if (!bc) {
+		np->rv_ctest4	|= 0x80;
+	}
+	else {
+		--bc;
+		np->rv_dmode	|= ((bc & 0x3) << 6);
+		np->rv_ctest5	|= (bc & 0x4);
+	}
+}
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+
+/*
+**	Get target set-up from Symbios format NVRAM.
+*/
+
+__initfunc(
+static void
+	ncr_Symbios_setup_target(ncb_p np, int target, Symbios_nvram *nvram)
+)
+{
+	tcb_p tp = &np->target[target];
+	Symbios_target *tn = &nvram->target[target];
+
+	tp->usrsync = tn->sync_period ? (tn->sync_period + 3) / 4 : 255;
+	tp->usrwide = tn->bus_width == 0x10 ? 1 : 0;
+	tp->usrtags =
+		(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SCSI_NCR_MAX_TAGS : 0;
+
+	if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
+		tp->usrflag |= UF_NODISC;
+	if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
+		tp->usrflag |= UF_NOSCAN;
+}
+
+/*
+**	Get target set-up from Tekram format NVRAM.
+*/
+
+__initfunc(
+static void
+	ncr_Tekram_setup_target(ncb_p np, int target, Tekram_nvram *nvram)
+)
+{
+	tcb_p tp = &np->target[target];
+	struct Tekram_target *tn = &nvram->target[target];
+	int i;
+
+	if (tn->flags & TEKRAM_SYNC_NEGO) {
+		i = tn->sync_index & 0xf;
+		tp->usrsync = i < 12 ? Tekram_sync[i] : 255;
+	}
+
+	tp->usrwide = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0;
+
+	if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
+		tp->usrtags = 2 << nvram->max_tags_index;
+		if (tp->usrtags > SCSI_NCR_MAX_TAGS)
+			tp->usrtags = SCSI_NCR_MAX_TAGS;
+	}
+
+	if (!(tn->flags & TEKRAM_DISCONNECT_ENABLE))
+		tp->usrflag = UF_NODISC;
+ 
+	/* If any device does not support parity, we will not use this option */
+	if (!(tn->flags & TEKRAM_PARITY_CHECK))
+		np->rv_scntl0  &= ~0x0a; /* SCSI parity checking disabled */
+}
+#endif /* SCSI_NCR_NVRAM_SUPPORT */
+
+__initfunc(
+static int ncr_prepare_setting(ncb_p np, ncr_nvram *nvram)
+)
+{
+	u_char	burst_max;
+	u_long	period;
+	int i;
+
+	/*
+	**	Save assumed BIOS setting
+	*/
+
+	np->sv_scntl0	= INB(nc_scntl0) & 0x0a;
+	np->sv_scntl3	= INB(nc_scntl3) & 0x07;
+	np->sv_dmode	= INB(nc_dmode)  & 0xce;
+	np->sv_dcntl	= INB(nc_dcntl)  & 0xa8;
+	np->sv_ctest3	= INB(nc_ctest3) & 0x01;
+	np->sv_ctest4	= INB(nc_ctest4) & 0x80;
+	np->sv_ctest5	= INB(nc_ctest5) & 0x24;
+	np->sv_gpcntl	= INB(nc_gpcntl);
+	np->sv_stest2	= INB(nc_stest2) & 0x20;
+	np->sv_stest4	= INB(nc_stest4);
+
+	/*
+	**	Wide ?
+	*/
+
+	np->maxwide	= (np->features & FE_WIDE)? 1 : 0;
+
+	/*
+	**	Get the frequency of the chip's clock.
+	**	Find the right value for scntl3.
+	*/
+
+	if	(np->features & FE_QUAD)
+		np->multiplier	= 4;
+	else if	(np->features & FE_DBLR)
+		np->multiplier	= 2;
+	else
+		np->multiplier	= 1;
+
+	np->clock_khz	= (np->features & FE_CLK80)? 80000 : 40000;
+	np->clock_khz	*= np->multiplier;
+
+	if (np->clock_khz != 40000)
+		ncr_getclock(np, np->multiplier);
+
+	/*
+	 * Divisor to be used for async (timer pre-scaler).
+	 */
+	i = np->clock_divn - 1;
+	while (i >= 0) {
+		--i;
+		if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
+			++i;
+			break;
+		}
+	}
+	np->rv_scntl3 = i+1;
+
+	/*
+	 * Minimum synchronous period factor supported by the chip.
+	 * Btw, 'period' is in tenths of nanoseconds.
+	 */
+
+	period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
+	if	(period <= 250)		np->minsync = 10;
+	else if	(period <= 303)		np->minsync = 11;
+	else if	(period <= 500)		np->minsync = 12;
+	else				np->minsync = (period + 40 - 1) / 40;
+
+	/*
+	 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
+	 */
+
+	if	(np->minsync < 25 && !(np->features & (FE_ULTRA|FE_ULTRA2)))
+		np->minsync = 25;
+	else if	(np->minsync < 12 && !(np->features & FE_ULTRA2))
+		np->minsync = 12;
+
+	/*
+	 * Maximum synchronous period factor supported by the chip.
+	 */
+
+	period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
+	np->maxsync = period > 2540 ? 254 : period / 10;
+
+	/*
+	**	Prepare initial value of other IO registers
+	*/
+#if defined SCSI_NCR_TRUST_BIOS_SETTING
+	np->rv_scntl0	= np->sv_scntl0;
+	np->rv_dmode	= np->sv_dmode;
+	np->rv_dcntl	= np->sv_dcntl;
+	np->rv_ctest3	= np->sv_ctest3;
+	np->rv_ctest4	= np->sv_ctest4;
+	np->rv_ctest5	= np->sv_ctest5;
+	burst_max	= burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
+#else
+
+	/*
+	**	Select burst length (dwords)
+	*/
+	burst_max	= driver_setup.burst_max;
+	if (burst_max == 255)
+		burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
+	if (burst_max > 7)
+		burst_max = 7;
+	if (burst_max > np->maxburst)
+		burst_max = np->maxburst;
+
+	/*
+	**	Select all supported special features
+	*/
+	if (np->features & FE_ERL)
+		np->rv_dmode	|= ERL;		/* Enable Read Line */
+	if (np->features & FE_BOF)
+		np->rv_dmode	|= BOF;		/* Burst Opcode Fetch */
+	if (np->features & FE_ERMP)
+		np->rv_dmode	|= ERMP;	/* Enable Read Multiple */
+	if (np->features & FE_PFEN)
+		np->rv_dcntl	|= PFEN;	/* Prefetch Enable */
+	if (np->features & FE_CLSE)
+		np->rv_dcntl	|= CLSE;	/* Cache Line Size Enable */
+	if (np->features & FE_WRIE)
+		np->rv_ctest3	|= WRIE;	/* Write and Invalidate */
+	if (np->features & FE_DFS)
+		np->rv_ctest5	|= DFS;		/* Dma Fifo Size */
+
+	/*
+	**	Select some other
+	*/
+	if (driver_setup.master_parity)
+		np->rv_ctest4	|= MPEE;	/* Master parity checking */
+	if (driver_setup.scsi_parity)
+		np->rv_scntl0	|= 0x0a;	/*  full arb., ena parity, par->ATN  */
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	/*
+	**	Get parity checking, host ID and verbose mode from NVRAM
+	**/
+	if (nvram) {
+		switch(nvram->type) {
+		case SCSI_NCR_TEKRAM_NVRAM:
+			np->myaddr = nvram->data.Tekram.host_id & 0x0f;
+			break;
+		case SCSI_NCR_SYMBIOS_NVRAM:
+			if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
+				np->rv_scntl0  &= ~0x0a;
+			np->myaddr = nvram->data.Symbios.host_id & 0x0f;
+			if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
+				np->verbose += 1;
+			break;
+		}
+	}
+#endif
+	/*
+	**  Get SCSI addr of host adapter (set by bios?).
+	*/
+	if (!np->myaddr) np->myaddr = INB(nc_scid) & 0x07;
+	if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
+
+
+#endif /* SCSI_NCR_TRUST_BIOS_SETTING */
+
+	/*
+	 *	Prepare initial io register bits for burst length
+	 */
+	ncr_init_burst(np, burst_max);
+
+	/*
+	**	Set differential mode and LED support.
+	**	Ignore these features for boards known to use a 
+	**	specific GPIO wiring (Tekram only for now).
+	**	Probe initial setting of GPREG and GPCNTL for 
+	**	other ones.
+	*/
+	if (!nvram || nvram->type != SCSI_NCR_TEKRAM_NVRAM) {
+		switch(driver_setup.diff_support) {
+		case 3:
+			if (INB(nc_gpreg) & 0x08)
+			break;
+		case 2:
+			np->rv_stest2	|= 0x20;
+			break;
+		case 1:
+			np->rv_stest2	|= (np->sv_stest2 & 0x20);
+			break;
+		default:
+			break;
+		}
+	}
+	if ((driver_setup.led_pin ||
+	     (nvram && nvram->type == SCSI_NCR_SYMBIOS_NVRAM)) &&
+	    !(np->sv_gpcntl & 0x01))
+		np->features |= FE_LED0;
+
+	/*
+	**	Set irq mode.
+	*/
+	switch(driver_setup.irqm) {
+	case 2:
+		np->rv_dcntl	|= IRQM;
+		break;
+	case 1:
+		np->rv_dcntl	|= (np->sv_dcntl & IRQM);
+		break;
+	default:
+		break;
+	}
+
+	/*
+	**	Configure targets according to driver setup.
+	**	If NVRAM present get targets setup from NVRAM.
+	**	Allow to override sync, wide and NOSCAN from 
+	**	boot command line.
+	*/
+	for (i = 0 ; i < MAX_TARGET ; i++) {
+		tcb_p tp = &np->target[i];
+
+		tp->usrsync = 255;
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+		if (nvram) {
+			switch(nvram->type) {
+			case SCSI_NCR_TEKRAM_NVRAM:
+				ncr_Tekram_setup_target(np, i, &nvram->data.Tekram);
+				break;
+			case SCSI_NCR_SYMBIOS_NVRAM:
+				ncr_Symbios_setup_target(np, i, &nvram->data.Symbios);
+				break;
+			}
+			if (driver_setup.use_nvram & 0x2)
+				tp->usrsync = driver_setup.default_sync;
+			if (driver_setup.use_nvram & 0x4)
+				tp->usrwide = driver_setup.max_wide;
+			if (driver_setup.use_nvram & 0x8)
+				tp->usrflag &= ~UF_NOSCAN;
+		}
+		else {
+#else
+		if (1) {
+#endif
+			tp->usrsync = driver_setup.default_sync;
+			tp->usrwide = driver_setup.max_wide;
+			tp->usrtags = driver_setup.default_tags;
+			if (!driver_setup.disconnection)
+				np->target[i].usrflag = UF_NODISC;
+		}
+	}
+
+	/*
+	**	Announce all that stuff to user.
+	*/
+
+	i = nvram ? nvram->type : 0;
+	printf(KERN_INFO "%s: %sID %d, Fast-%d%s%s\n", ncr_name(np),
+		i  == SCSI_NCR_SYMBIOS_NVRAM ? "Symbios format NVRAM, " :
+		(i == SCSI_NCR_TEKRAM_NVRAM  ? "Tekram format NVRAM, " : ""),
+		np->myaddr,
+		np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
+		(np->rv_scntl0 & 0xa)	? ", Parity Checking"	: ", NO Parity",
+		(np->rv_stest2 & 0x20)	? ", Differential"	: "");
+
+	if (bootverbose > 1) {
+		printf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
+			"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
+			ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
+			np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
+
+		printf ("%s: final   SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
+			"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
+			ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
+			np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
+	}
+
+	if (bootverbose && np->paddr2)
+		printf (KERN_INFO "%s: on-board RAM at 0x%lx\n",
+			ncr_name(np), np->paddr2);
+
+	return 0;
+}
+
+
+#ifdef SCSI_NCR_DEBUG_NVRAM
+
+__initfunc(
+void ncr_display_Symbios_nvram(ncb_p np, Symbios_nvram *nvram)
+)
+{
+	int i;
+
+	/* display Symbios nvram host data */
+	printf("%s: HOST ID=%d%s%s%s%s\n",
+		ncr_name(np), nvram->host_id & 0x0f,
+		(nvram->flags  & SYMBIOS_SCAM_ENABLE)	? " SCAM"	:"",
+		(nvram->flags  & SYMBIOS_PARITY_ENABLE)	? " PARITY"	:"",
+		(nvram->flags  & SYMBIOS_VERBOSE_MSGS)	? " VERSBOSE"	:"", 
+		(nvram->flags1 & SYMBIOS_SCAN_HI_LO)	? " HI_LO"	:"");
+
+	/* display Symbios nvram drive data */
+	for (i = 0 ; i < 15 ; i++) {
+		struct Symbios_target *tn = &nvram->target[i];
+		printf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n",
+		ncr_name(np), i,
+		(tn->flags & SYMBIOS_DISCONNECT_ENABLE)	? " DISC"	: "",
+		(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME)	? " SCAN_BOOT"	: "",
+		(tn->flags & SYMBIOS_SCAN_LUNS)		? " SCAN_LUNS"	: "",
+		(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ"	: "",
+		tn->bus_width,
+		tn->sync_period / 4,
+		tn->timeout);
+	}
+}
+
+static u_char Tekram_boot_delay[7] __initdata = {3, 5, 10, 20, 30, 60, 120};
+
+__initfunc(
+void ncr_display_Tekram_nvram(ncb_p np, Tekram_nvram *nvram)
+)
+{
+	int i, tags, boot_delay;
+	char *rem;
+
+	/* display Tekram nvram host data */
+	tags = 2 << nvram->max_tags_index;
+	boot_delay = 0;
+	if (nvram->boot_delay_index < 6)
+		boot_delay = Tekram_boot_delay[nvram->boot_delay_index];
+	switch((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {
+	default:
+	case 0:	rem = "";			break;
+	case 1: rem = " REMOVABLE=boot device";	break;
+	case 2: rem = " REMOVABLE=all";		break;
+	}
+
+	printf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n",
+		ncr_name(np), nvram->host_id & 0x0f,
+		(nvram->flags1 & SYMBIOS_SCAM_ENABLE)	? " SCAM"	:"",
+		(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES"	:"",
+		(nvram->flags & TEKRAM_DRIVES_SUP_1GB)	? " >1GB"	:"",
+		(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET"	:"",
+		(nvram->flags & TEKRAM_ACTIVE_NEGATION)	? " ACT_NEG"	:"",
+		(nvram->flags & TEKRAM_IMMEDIATE_SEEK)	? " IMM_SEEK"	:"",
+		(nvram->flags & TEKRAM_SCAN_LUNS)	? " SCAN_LUNS"	:"",
+		(nvram->flags1 & TEKRAM_F2_F6_ENABLED)	? " F2_F6"	:"",
+		rem, boot_delay, tags);
+
+	/* display Tekram nvram drive data */
+	for (i = 0; i <= 15; i++) {
+		int sync, j;
+		struct Tekram_target *tn = &nvram->target[i];
+		j = tn->sync_index & 0xf;
+		sync = j < 12 ? Tekram_sync[j] : 255;
+		printf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n",
+		ncr_name(np), i,
+		(tn->flags & TEKRAM_PARITY_CHECK)	? " PARITY"	: "",
+		(tn->flags & TEKRAM_SYNC_NEGO)		? " SYNC"	: "",
+		(tn->flags & TEKRAM_DISCONNECT_ENABLE)	? " DISC"	: "",
+		(tn->flags & TEKRAM_START_CMD)		? " START"	: "",
+		(tn->flags & TEKRAM_TAGGED_COMMANDS)	? " TCQ"	: "",
+		(tn->flags & TEKRAM_WIDE_NEGO)		? " WIDE"	: "",
+		sync);
+	}
+}
+#endif /* SCSI_NCR_DEBUG_NVRAM */
+
+/*
+**	Host attach and initialisations.
+**
+**	Allocate host data and ncb structure.
+**	Request IO region and remap MMIO region.
+**	Do chip initialization.
+**	If all is OK, install interrupt handling and
+**	start the timer daemon.
+*/
+
+__initfunc(
+static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device)
+)
+{
+        struct host_data *host_data;
+	ncb_p np;
+        struct Scsi_Host *instance = 0;
+	u_long flags = 0;
+	ncr_nvram *nvram = device->nvram;
+
+printf(KERN_INFO "ncr53c%s-%d: rev=0x%02x, base=0x%x, io_port=0x%x, irq=%d\n",
+	device->chip.name, unit, device->chip.revision_id, device->slot.base,
+	device->slot.io_port, device->slot.irq);
+
+	/*
+	**	Allocate host_data structure
+	*/
+        if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
+	        goto attach_error;
+
+	/*
+	**	Initialize structure.
+	*/
+	host_data = (struct host_data *) instance->hostdata;
+
+	/*
+	**	Align np and first ccb to 32 boundary for cache line 
+	**	bursting when copying the global header.
+	*/
+	np        = (ncb_p) (((u_long) &host_data->_ncb_data) & NCB_ALIGN_MASK);
+	host_data->ncb = np;
+	bzero (np, sizeof (*np));
+
+	np->ccb   = (ccb_p) (((u_long) &host_data->_ccb_data) & CCB_ALIGN_MASK);
+	bzero (np->ccb, sizeof (*np->ccb));
+
+	/*
+	**	Store input informations in the host data structure.
+	*/
+	strncpy(np->chip_name, device->chip.name, sizeof(np->chip_name) - 1);
+	np->unit	= unit;
+	np->verbose	= driver_setup.verbose;
+	sprintf(np->inst_name, "ncr53c%s-%d", np->chip_name, np->unit);
+	np->device_id	= device->chip.device_id;
+	np->revision_id	= device->chip.revision_id;
+	np->features	= device->chip.features;
+	np->clock_divn	= device->chip.nr_divisor;
+	np->maxoffs	= device->chip.offset_max;
+	np->maxburst	= device->chip.burst_max;
+
+	np->script0  =
+	(struct script *) (((u_long) &host_data->script_data) & SCR_ALIGN_MASK);
+	np->scripth0 = &host_data->scripth_data;
+
+	/*
+	**    Initialize timer structure
+        **
+        */
+	init_timer(&np->timer);
+	np->timer.data     = (unsigned long) np;
+	np->timer.function = ncr53c8xx_timeout;
+
+	/*
+	**	Try to map the controller chip to
+	**	virtual and physical memory.
+	*/
+
+	np->paddr	= device->slot.base;
+	np->paddr2	= (np->features & FE_RAM)? device->slot.base_2 : 0;
+
+#ifndef NCR_IOMAPPED
+	np->vaddr = remap_pci_mem((u_long) np->paddr, (u_long) 128);
+	if (!np->vaddr) {
+		printf("%s: can't map memory mapped IO region\n", ncr_name(np));
+		goto attach_error;
+	}
+	else
+		if (bootverbose > 1)
+			printf("%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
+
+	/*
+	**	Make the controller's registers available.
+	**	Now the INB INW INL OUTB OUTW OUTL macros
+	**	can be used safely.
+	*/
+
+	np->reg = (struct ncr_reg*) np->vaddr;
+
+#endif /* !defined NCR_IOMAPPED */
+
+	/*
+	**	Try to map the controller chip into iospace.
+	*/
+
+	request_region(device->slot.io_port, 128, "ncr53c8xx");
+	np->port = device->slot.io_port;
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	if (nvram) {
+		switch(nvram->type) {
+		case SCSI_NCR_SYMBIOS_NVRAM:
+#ifdef SCSI_NCR_DEBUG_NVRAM
+			ncr_display_Symbios_nvram(np, &nvram->data.Symbios);
+#endif
+			break;
+		case SCSI_NCR_TEKRAM_NVRAM:
+#ifdef SCSI_NCR_DEBUG_NVRAM
+			ncr_display_Tekram_nvram(np, &nvram->data.Tekram);
+#endif
+			break;
+		default:
+			nvram = 0;
+#ifdef SCSI_NCR_DEBUG_NVRAM
+			printf("%s: NVRAM: None or invalid data.\n", ncr_name(np));
+#endif
+		}
+	}
+#endif
+
+	/*
+	**	Do chip dependent initialization.
+	*/
+	(void)ncr_prepare_setting(np, nvram);
+
+#ifndef NCR_IOMAPPED
+	if (np->paddr2 && sizeof(struct script) <= 4096) {
+		np->vaddr2 = remap_pci_mem((u_long) np->paddr2, (u_long) 4096);
+		if (!np->vaddr2) {
+			printf("%s: can't map memory mapped IO region\n", ncr_name(np));
+			goto attach_error;
+		}
+		else
+			if (bootverbose > 1)
+				printf("%s: on-board ram mapped at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr2);
+	}
+#endif /* !defined NCR_IOMAPPED */
+
+	/*
+	**	Fill Linux host instance structure
+	*/
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+	instance->max_channel	= 0;
+	instance->max_id	= np->maxwide ? 16 : 8;
+	instance->max_lun	= SCSI_NCR_MAX_LUN;
+#endif
+#ifndef NCR_IOMAPPED
+	instance->base		= (char *) np->reg;
+#endif
+	instance->irq		= device->slot.irq;
+	instance->io_port	= device->slot.io_port;
+	instance->n_io_port	= 128;
+	instance->dma_channel	= 0;
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
+	instance->select_queue_depths = ncr53c8xx_select_queue_depths;
+#endif
+
+	/*
+	**	Patch script to physical addresses
+	*/
+	ncr_script_fill (&script0, &scripth0);
+
+	np->scripth	= np->scripth0;
+	np->p_scripth	= vtophys(np->scripth);
+
+	np->script	= (np->vaddr2) ? (struct script *) np->vaddr2 : np->script0;
+	np->p_script	= (np->vaddr2) ? np->paddr2 : vtophys(np->script0);
+
+	ncr_script_copy_and_bind (np, (ncrcmd *) &script0, (ncrcmd *) np->script0, sizeof(struct script));
+	ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0, (ncrcmd *) np->scripth0, sizeof(struct scripth));
+	np->ccb->p_ccb		= vtophys (np->ccb);
+
+	/*
+	**    Patch the script for LED support.
+	*/
+
+	if (np->features & FE_LED0) {
+		np->script0->reselect[0]  =
+				cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR,  0x01));
+		np->script0->reselect1[0] =
+				cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
+		np->script0->reselect2[0] =
+				cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
+	}
+
+	/*
+	**	init data structure
+	*/
+
+	np->jump_tcb.l_cmd	= cpu_to_scr(SCR_JUMP);
+	np->jump_tcb.l_paddr	= cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
+
+	/*
+	**	Reset chip.
+	*/
+
+	OUTB (nc_istat,  SRST);
+	DELAY (1000);
+	OUTB (nc_istat,  0   );
+
+	/*
+	**	Now check the cache handling of the pci chipset.
+	*/
+
+	if (ncr_snooptest (np)) {
+		printf ("CACHE INCORRECTLY CONFIGURED.\n");
+		goto attach_error;
+	};
+
+	/*
+	**	Install the interrupt handler.
+	*/
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
+#ifdef SCSI_NCR_SHARE_IRQ
+	if (bootverbose > 1)
+		printf("%s: requesting shared irq %d (dev_id=0x%lx)\n",
+		        ncr_name(np), device->slot.irq, (u_long) np);
+	if (request_irq(device->slot.irq, ncr53c8xx_intr,
+			SA_INTERRUPT|SA_SHIRQ, "ncr53c8xx", np)) {
+#else
+	if (request_irq(device->slot.irq, ncr53c8xx_intr,
+			SA_INTERRUPT, "ncr53c8xx", np)) {
+#endif
+#else
+	if (request_irq(device->slot.irq, ncr53c8xx_intr,
+			SA_INTERRUPT, "ncr53c8xx")) {
+#endif
+		printf("%s: request irq %d failure\n", ncr_name(np), device->slot.irq);
+		goto attach_error;
+	}
+	np->irq = device->slot.irq;
+
+	/*
+	**	After SCSI devices have been opened, we cannot
+	**	reset the bus safely, so we do it here.
+	**	Interrupt handler does the real work.
+	**	Process the reset exception,
+	**	if interrupts are not enabled yet.
+	**	Then enable disconnects.
+	*/
+	save_flags(flags); cli();
+	if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
+		printf("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
+		restore_flags(flags);
+		goto attach_error;
+	}
+	ncr_exception (np);
+	restore_flags(flags);
+
+	np->disc = 1;
+
+	/*
+	**	The middle-level SCSI driver does not
+	**	wait devices to settle.
+	**	Wait synchronously if more than 2 seconds.
+	*/
+	if (driver_setup.settle_delay > 2) {
+		printf("%s: waiting %d seconds for scsi devices to settle...\n",
+			ncr_name(np), driver_setup.settle_delay);
+		DELAY(1000000UL * driver_setup.settle_delay);
+	}
+
+	/*
+	**	Now let the generic SCSI driver
+	**	look for the SCSI devices on the bus ..
+	*/
+
+	/*
+	**	start the timeout daemon
+	*/
+	np->lasttime=0;
+	ncr_timeout (np);
+
+	/*
+	**  use SIMPLE TAG messages by default
+	*/
+#ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
+	np->order = M_SIMPLE_TAG;
+#endif
+
+	/*
+	**  Done.
+	*/
+        if (!the_template) {
+        	the_template = instance->hostt;
+        	first_host = instance;
+	}
+
+	return 0;
+
+attach_error:
+	if (!instance) return -1;
+	printf("%s: detaching...\n", ncr_name(np));
+#ifndef NCR_IOMAPPED
+	if (np->vaddr) {
+#ifdef DEBUG_NCR53C8XX
+		printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr, 128);
+#endif
+		unmap_pci_mem((vm_offset_t) np->vaddr, (u_long) 128);
+	}
+	if (np->vaddr2) {
+#ifdef DEBUG_NCR53C8XX
+		printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr2, 4096);
+#endif
+		unmap_pci_mem((vm_offset_t) np->vaddr2, (u_long) 4096);
+	}
+#endif
+	if (np->port) {
+#ifdef DEBUG_NCR53C8XX
+		printf("%s: releasing IO region %x[%d]\n", ncr_name(np), np->port, 128);
+#endif
+		release_region(np->port, 128);
+	}
+	if (np->irq) {
+#ifdef DEBUG_NCR53C8XX
+		printf("%s: freeing irq %d\n", ncr_name(np), np->irq);
+#endif
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
+		free_irq(np->irq, np);
+#else
+		free_irq(np->irq);
+#endif
+	}
+	scsi_unregister(instance);
+
+        return -1;
+ }
+
+/*==========================================================
+**
+**
+**	Start execution of a SCSI command.
+**	This is called from the generic SCSI driver.
+**
+**
+**==========================================================
+*/
+int ncr_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
+{
+        struct Scsi_Host   *host      = cmd->host;
+/*	Scsi_Device        *device    = cmd->device; */
+	struct host_data   *host_data = (struct host_data *) host->hostdata;
+	ncb_p np                      = host_data->ncb;
+	tcb_p tp                      = &np->target[cmd->target];
+
+	ccb_p cp;
+	lcb_p lp;
+
+	int	segments;
+	u_char	qidx, nego, idmsg, *msgptr;
+	u_int  msglen, msglen2;
+	u_long	flags;
+	int	xfer_direction;
+
+	cmd->scsi_done     = done;
+	cmd->host_scribble = NULL;
+	cmd->SCp.ptr       = NULL;
+	cmd->SCp.buffer    = NULL;
+
+	/*---------------------------------------------
+	**
+	**      Some shortcuts ...
+	**
+	**---------------------------------------------
+	*/
+	if ((cmd->target == np->myaddr	  ) ||
+		(cmd->target >= MAX_TARGET) ||
+		(cmd->lun    >= MAX_LUN   )) {
+		return(DID_BAD_TARGET);
+        }
+
+	/*---------------------------------------------
+	**
+	**	Complete the 1st TEST UNIT READY command
+	**	with error condition if the device is 
+	**	flagged NOSCAN, in order to speed up 
+	**	the boot.
+	**
+	**---------------------------------------------
+	*/
+	if (cmd->cmnd[0] == 0 && (tp->usrflag & UF_NOSCAN)) {
+		tp->usrflag &= ~UF_NOSCAN;
+		return DID_BAD_TARGET;
+	}
+
+	if (DEBUG_FLAGS & DEBUG_TINY) {
+		PRINT_ADDR(cmd);
+		printf ("CMD=%x ", cmd->cmnd[0]);
+	}
+
+	/*---------------------------------------------------
+	**
+	**	Assign a ccb / bind cmd.
+	**	If resetting, shorten settle_time if necessary
+	**	in order to avoid spurious timeouts.
+	**	If resetting or no free ccb,
+	**	insert cmd into the waiting list.
+	**
+	**----------------------------------------------------
+	*/
+	save_flags(flags); cli();
+
+	if (np->settle_time && cmd->timeout_per_command >= HZ &&
+		np->settle_time > jiffies + cmd->timeout_per_command - HZ) {
+		np->settle_time = jiffies + cmd->timeout_per_command - HZ;
+	}
+
+        if (np->settle_time || !(cp=ncr_get_ccb (np, cmd->target, cmd->lun))) {
+		insert_into_waiting_list(np, cmd);
+		restore_flags(flags);
+		return(DID_OK);
+	}
+	cp->cmd = cmd;
+
+	/*---------------------------------------------------
+	**
+	**	Enable tagged queue if asked by scsi ioctl
+	**
+	**----------------------------------------------------
+	*/
+	if (!tp->usrtags && cmd->device && cmd->device->tagged_queue) {
+		tp->usrtags = SCSI_NCR_MAX_TAGS;
+		ncr_setmaxtags (np, tp, SCSI_NCR_MAX_TAGS);
+	}
+
+	/*---------------------------------------------------
+	**
+	**	timestamp
+	**
+	**----------------------------------------------------
+	*/
+#ifdef SCSI_NCR_PROFILE_SUPPORT
+	bzero (&cp->phys.header.stamp, sizeof (struct tstamp));
+	cp->phys.header.stamp.start = jiffies;
+#endif
+
+	/*----------------------------------------------------
+	**
+	**	Get device quirks from a speciality table.
+	**
+	**	@GENSCSI@
+	**	This should be a part of the device table
+	**	in "scsi_conf.c".
+	**
+	**----------------------------------------------------
+	*/
+	if (tp->quirks & QUIRK_UPDATE) {
+		tp->quirks = ncr_lookup ((char*) &tp->inqdata[0]);
+#ifndef NCR_GETCC_WITHMSG
+		if (tp->quirks) {
+			PRINT_ADDR(cmd);
+			printf ("quirks=%x.\n", tp->quirks);
+		}
+#endif
+	}
+
+	/*---------------------------------------------------
+	**
+	**	negotiation required?
+	**
+	**	Only SCSI-II devices.
+	**	To negotiate with SCSI-I devices is dangerous, since
+	**	Synchronous Negotiation protocol is optional, and
+	**	INQUIRY data do not contains capabilities in byte 7.
+	**----------------------------------------------------
+	*/
+
+	nego = 0;
+
+	if (cmd->lun == 0 && !tp->nego_cp && 
+	    (tp->inqdata[2] & 0x7) >= 2 && tp->inqdata[7]) {
+		/*
+		**	negotiate wide transfers ?
+		*/
+
+		if (!tp->widedone) {
+			if (tp->inqdata[7] & INQ7_WIDE16) {
+				nego = NS_WIDE;
+			} else
+				tp->widedone=1;
+		};
+
+		/*
+		**	negotiate synchronous transfers?
+		*/
+
+		if (!nego && !tp->period) {
+			if ( 1
+#if defined (CDROM_ASYNC)
+			    && ((tp->inqdata[0] & 0x1f) != 5)
+#endif
+			    && (tp->inqdata[7] & INQ7_SYNC)) {
+				nego = NS_SYNC;
+			} else {
+				tp->period  =0xffff;
+				tp->sval = 0xe0;
+				PRINT_ADDR(cmd);
+				printf ("asynchronous.\n");
+			};
+		};
+
+		/*
+		**	remember nego is pending for the target.
+		**	Avoid to start a nego for all queued commands 
+		**	when tagged command queuing is enabled.
+		*/
+
+		if (nego)
+			tp->nego_cp = cp;
+	};
+
+	/*---------------------------------------------------
+	**
+	**	choose a new tag ...
+	**
+	**----------------------------------------------------
+	*/
+
+	if ((lp = tp->lp[cmd->lun]) && (lp->usetags)) {
+		/*
+		**	assign a tag to this ccb!
+		*/
+		while (!cp->tag) {
+			ccb_p cp2 = lp->next_ccb;
+			lp->lasttag = lp->lasttag % 255 + 1;
+			while (cp2 && cp2->tag != lp->lasttag)
+				cp2 = cp2->next_ccb;
+			if (cp2) continue;
+			cp->tag=lp->lasttag;
+			if (DEBUG_FLAGS & DEBUG_TAGS) {
+				PRINT_ADDR(cmd);
+				printf ("using tag #%d.\n", cp->tag);
+			}
+		}
+	} else {
+		cp->tag=0;
+	}
+
+	/*----------------------------------------------------
+	**
+	**	Build the identify / tag / sdtr message
+	**
+	**----------------------------------------------------
+	*/
+
+	idmsg = M_IDENTIFY | cmd->lun;
+
+	if (cp != np->ccb && ((np->disc && !(tp->usrflag & UF_NODISC)) || cp->tag))
+		idmsg |= 0x40;
+
+	msgptr = cp->scsi_smsg;
+	msglen = 0;
+	msgptr[msglen++] = idmsg;
+
+	if (cp->tag) {
+	    char tag;
+
+	    tag = np->order;
+	    if (tag == 0) {
+		/*
+		**	Ordered write ops, unordered read ops.
+		*/
+		switch (cmd->cmnd[0]) {
+		case 0x08:  /* READ_SMALL (6) */
+		case 0x28:  /* READ_BIG  (10) */
+		case 0xa8:  /* READ_HUGE (12) */
+		    tag = M_SIMPLE_TAG;
+		    break;
+		default:
+		    tag = M_ORDERED_TAG;
+		}
+	    }
+	    /*
+	    **	Have to force ordered tag to avoid timeouts
+	    */
+	    if ((lp = tp->lp[cmd->lun]) && (lp->force_ordered_tag)) {
+		tag = M_ORDERED_TAG;
+		lp->force_ordered_tag = 0;
+		if (DEBUG_FLAGS & DEBUG_TAGS) {
+			PRINT_ADDR(cmd);
+			printf ("Ordered Queue Tag forced\n");
+		}
+	    }
+	    msgptr[msglen++] = tag;
+	    msgptr[msglen++] = cp -> tag;
+	}
+
+	switch (nego) {
+	case NS_SYNC:
+		msgptr[msglen++] = M_EXTENDED;
+		msgptr[msglen++] = 3;
+		msgptr[msglen++] = M_X_SYNC_REQ;
+		msgptr[msglen++] = tp->maxoffs ? tp->minsync : 0;
+		msgptr[msglen++] = tp->maxoffs;
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("sync msgout: ");
+			ncr_show_msg (&cp->scsi_smsg [msglen-5]);
+			printf (".\n");
+		};
+		break;
+	case NS_WIDE:
+		msgptr[msglen++] = M_EXTENDED;
+		msgptr[msglen++] = 2;
+		msgptr[msglen++] = M_X_WIDE_REQ;
+		msgptr[msglen++] = tp->usrwide;
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("wide msgout: ");
+			ncr_show_msg (&cp->scsi_smsg [msglen-4]);
+			printf (".\n");
+		};
+		break;
+	};
+
+	/*----------------------------------------------------
+	**
+	**	Build the identify message for getcc.
+	**
+	**----------------------------------------------------
+	*/
+
+	cp -> scsi_smsg2 [0] = idmsg;
+	msglen2 = 1;
+
+	/*----------------------------------------------------
+	**
+	**	Build the data descriptors
+	**
+	**----------------------------------------------------
+	*/
+
+	segments = ncr_scatter (cp, cp->cmd);
+
+	if (segments < 0) {
+		ncr_free_ccb(np, cp, cmd->target, cmd->lun);
+		restore_flags(flags);
+		return(DID_ERROR);
+	}
+
+	/*----------------------------------------------------
+	**
+	**	Guess xfer direction.
+	**	Spare some CPU by testing here frequently opcode.
+	**
+	**----------------------------------------------------
+	*/
+	switch((int) cmd->cmnd[0]) {
+	case 0x08:  /*	READ(6)				08 */
+	case 0x28:  /*	READ(10)			28 */
+	case 0xA8:  /*	READ(12)			A8 */
+		xfer_direction = XferIn;
+		break;
+	case 0x0A:  /*	WRITE(6)			0A */
+	case 0x2A:  /*	WRITE(10)			2A */
+	case 0xAA:  /*	WRITE(12)			AA */
+		xfer_direction = XferOut;
+		break;
+	default:
+		xfer_direction = guess_xfer_direction((int) cmd->cmnd[0]);
+		break;
+	}
+
+	/*----------------------------------------------------
+	**
+	**	Set the SAVED_POINTER.
+	**
+	**----------------------------------------------------
+	*/
+
+	cp->segments = segments;
+	if (!cp->data_len)
+		xfer_direction = XferNone;
+
+	switch (xfer_direction) {
+		u_long endp;
+	default:
+	case XferBoth:
+		cp->phys.header.savep =
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, data_io));
+		cp->phys.header.goalp = cp->phys.header.savep;
+		break;
+	case XferIn:
+		endp = NCB_SCRIPT_PHYS (np, data_in) + MAX_SCATTER*16;
+		cp->phys.header.goalp = cpu_to_scr(endp + 8);
+		cp->phys.header.savep = cpu_to_scr(endp - segments*16);
+		break;
+	case XferOut:
+		endp = NCB_SCRIPTH_PHYS (np, data_out) + MAX_SCATTER*16;
+		cp->phys.header.goalp = cpu_to_scr(endp + 8);
+		cp->phys.header.savep = cpu_to_scr(endp - segments*16);
+		break;
+	case XferNone:
+		cp->phys.header.savep =
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, no_data));
+		cp->phys.header.goalp = cp->phys.header.savep;
+		break;
+	}
+
+	cp->phys.header.lastp = cp->phys.header.savep;
+
+	/*----------------------------------------------------
+	**
+	**	fill in ccb
+	**
+	**----------------------------------------------------
+	**
+	**
+	**	physical -> virtual backlink
+	**	Generic SCSI command
+	*/
+	cp->phys.header.cp		= cp;
+	/*
+	**	Startqueue
+	*/
+	cp->phys.header.launch.l_paddr	=
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
+	cp->phys.header.launch.l_cmd	= cpu_to_scr(SCR_JUMP);
+	/*
+	**	select
+	*/
+	cp->phys.select.sel_id		= cmd->target;
+	cp->phys.select.sel_scntl3	= tp->wval;
+	cp->phys.select.sel_sxfer	= tp->sval;
+	/*
+	**	message
+	*/
+	cp->phys.smsg.addr		= cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
+	cp->phys.smsg.size		= cpu_to_scr(msglen);
+
+	cp->phys.smsg2.addr		= cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
+	cp->phys.smsg2.size		= cpu_to_scr(msglen2);
+	/*
+	**	command
+	*/
+	cp->phys.cmd.addr		= cpu_to_scr(vtophys (&cmd->cmnd[0]));
+	cp->phys.cmd.size		= cpu_to_scr(cmd->cmd_len);
+	/*
+	**	sense command
+	*/
+	cp->phys.scmd.addr		= cpu_to_scr(CCB_PHYS (cp, sensecmd));
+	cp->phys.scmd.size		= cpu_to_scr(6);
+	/*
+	**	patch requested size into sense command
+	*/
+	cp->sensecmd[0]			= 0x03;
+	cp->sensecmd[1]			= cmd->lun << 5;
+	cp->sensecmd[4]			= sizeof(cmd->sense_buffer);
+	/*
+	**	sense data
+	*/
+	cp->phys.sense.addr		=
+			cpu_to_scr(vtophys (&cmd->sense_buffer[0]));
+	cp->phys.sense.size		= cpu_to_scr(sizeof(cmd->sense_buffer));
+	/*
+	**	status
+	*/
+	cp->actualquirks		= tp->quirks;
+	cp->host_status			= nego ? HS_NEGOTIATE : HS_BUSY;
+	cp->scsi_status			= S_ILLEGAL;
+	cp->parity_status		= 0;
+
+	cp->xerr_status			= XE_OK;
+	cp->sync_status			= tp->sval;
+	cp->nego_status			= nego;
+	cp->wide_status			= tp->wval;
+
+	/*----------------------------------------------------
+	**
+	**	Critical region: start this job.
+	**
+	**----------------------------------------------------
+	*/
+
+	/*
+	**	reselect pattern and activate this job.
+	*/
+
+	cp->jump_ccb.l_cmd	=
+		cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (cp->tag))));
+
+	/* Compute a time limit greater than the middle-level driver one */
+	if (cmd->timeout_per_command > 0)
+		cp->tlimit	= jiffies + cmd->timeout_per_command + NCR_TIMEOUT_INCREASE;
+	else
+		cp->tlimit	= jiffies + 3600 * HZ; /* No timeout=one hour */
+	cp->magic		= CCB_MAGIC;
+
+	/*
+	**	insert into start queue.
+	*/
+
+	qidx = np->squeueput + 1;
+	if (qidx >= MAX_START) qidx=0;
+	np->squeue [qidx	 ] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
+	np->squeue [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, phys));
+	np->squeueput = qidx;
+
+	if(DEBUG_FLAGS & DEBUG_QUEUE)
+		printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
+		np->squeueput,
+		(unsigned)(scr_to_cpu(np->script->startpos[0]) - 
+			   (NCB_SCRIPTH_PHYS (np, tryloop))));
+
+	/*
+	**	Script processor may be waiting for reselect.
+	**	Wake it up.
+	*/
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	if (!np->stalling)
+#endif
+	OUTB (nc_istat, SIGP);
+
+	/*
+	**	and reenable interrupts
+	*/
+	restore_flags(flags);
+
+	/*
+	**	Command is successfully queued.
+	*/
+
+	return(DID_OK);
+}
+
+/*==========================================================
+**
+**
+**	Start reset process.
+**	If reset in progress do nothing.
+**	The interrupt handler will reinitialize the chip.
+**	The timeout handler will wait for settle_time before 
+**	clearing it and so resuming command processing.
+**
+**
+**==========================================================
+*/
+static void ncr_start_reset(ncb_p np, int settle_delay)
+{
+	u_long flags;
+
+	save_flags(flags); cli();
+
+	if (!np->settle_time) {
+		(void) ncr_reset_scsi_bus(np, 1, settle_delay);
+	}
+	restore_flags(flags);
+}
+
+static int ncr_reset_scsi_bus(ncb_p np, int enab_int, int settle_delay)
+{
+	u_int32 term;
+	int retv = 0;
+
+	np->settle_time	= jiffies + settle_delay * HZ;
+
+	if (bootverbose > 1)
+		printf("%s: resetting, "
+			"command processing suspended for %d seconds\n",
+			ncr_name(np), settle_delay);
+
+	OUTB (nc_istat, SRST);
+	DELAY (1000);
+	OUTB (nc_istat, 0);
+	if (enab_int)
+		OUTW (nc_sien, RST);
+	/*
+	**	Enable Tolerant, reset IRQD if present and 
+	**	properly set IRQ mode, prior to resetting the bus.
+	*/
+	OUTB (nc_stest3, TE);
+	OUTB (nc_dcntl, (np->rv_dcntl & IRQM));
+	OUTB (nc_scntl1, CRST);
+	DELAY (100);
+
+	if (!driver_setup.bus_check)
+		goto out;
+	/*
+	**	Check for no terminators or SCSI bus shorts to ground.
+	**	Read SCSI data bus, data parity bits and control signals.
+	**	We are expecting RESET to be TRUE and other signals to be 
+	**	FALSE.
+	*/
+	term =	INB(nc_sstat0);				/* rst, sdp0 */
+	term =	((term & 2) << 7) + ((term & 1) << 16);
+	term |= ((INB(nc_sstat2) & 0x01) << 25) |	/* sdp1 */
+		(INW(nc_sbdl) << 9) |			/* d15-0 */
+		INB(nc_sbcl);	/* req, ack, bsy, sel, atn, msg, cd, io */
+
+	if (!(np->features & FE_WIDE))
+		term &= 0x3ffff;
+
+	if (term != (2<<7)) {
+		printf("%s: suspicious SCSI data while resetting the BUS.\n",
+			ncr_name(np));
+		printf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
+			"0x%lx, expecting 0x%lx\n",
+			ncr_name(np),
+			(np->features & FE_WIDE) ? "dp1,d15-8," : "",
+			(u_long)term, (u_long)(2<<7));
+		if (driver_setup.bus_check == 1)
+			retv = 1;
+	}
+out:
+	OUTB (nc_scntl1, 0);
+	return retv;
+}
+
+/*==========================================================
+**
+**
+**	Reset the SCSI BUS.
+**	This is called from the generic SCSI driver.
+**
+**
+**==========================================================
+*/
+int ncr_reset_bus (Scsi_Cmnd *cmd, int sync_reset)
+{
+        struct Scsi_Host   *host      = cmd->host;
+/*	Scsi_Device        *device    = cmd->device; */
+	struct host_data   *host_data = (struct host_data *) host->hostdata;
+	ncb_p np                      = host_data->ncb;
+	ccb_p cp;
+	u_long flags;
+	int found;
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	if (np->stalling)
+		np->stalling = 0;
+#endif
+
+	save_flags(flags); cli();
+/*
+ * Return immediately if reset is in progress.
+ */
+	if (np->settle_time) {
+		restore_flags(flags);
+		return SCSI_RESET_PUNT;
+	}
+/*
+ * Start the reset process.
+ * The script processor is then assumed to be stopped.
+ * Commands will now be queued in the waiting list until a settle 
+ * delay of 2 seconds will be completed.
+ */
+	ncr_start_reset(np, driver_setup.settle_delay);
+/*
+ * First, look in the wakeup list
+ */
+	for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
+		/*
+		**	look for the ccb of this command.
+		*/
+		if (cp->host_status == HS_IDLE) continue;
+		if (cp->cmd == cmd) {
+			found = 1;
+			break;
+		}
+	}
+/*
+ * Then, look in the waiting list
+ */
+	if (!found && retrieve_from_waiting_list(0, np, cmd))
+		found = 1;
+/*
+ * Wake-up all awaiting commands with DID_RESET.
+ */
+	reset_waiting_list(np);
+/*
+ * Wake-up all pending commands with HS_RESET -> DID_RESET.
+ */
+	ncr_wakeup(np, HS_RESET);
+/*
+ * If the involved command was not in a driver queue, and the 
+ * scsi driver told us reset is synchronous, and the command is not 
+ * currently in the waiting list, complete it with DID_RESET status,
+ * in order to keep it alive.
+ */
+	if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
+		cmd->result = ScsiResult(DID_RESET, 0);
+		cmd->scsi_done(cmd);
+	}
+
+	restore_flags(flags);
+
+	return SCSI_RESET_SUCCESS;
+}
+
+/*==========================================================
+**
+**
+**	Abort an SCSI command.
+**	This is called from the generic SCSI driver.
+**
+**
+**==========================================================
+*/
+static int ncr_abort_command (Scsi_Cmnd *cmd)
+{
+        struct Scsi_Host   *host      = cmd->host;
+/*	Scsi_Device        *device    = cmd->device; */
+	struct host_data   *host_data = (struct host_data *) host->hostdata;
+	ncb_p np                      = host_data->ncb;
+	ccb_p cp;
+	u_long flags;
+	int found;
+	int retv;
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	if (np->stalling == 2)
+		np->stalling = 0;
+#endif
+
+	save_flags(flags); cli();
+/*
+ * First, look for the scsi command in the waiting list
+ */
+	if (remove_from_waiting_list(np, cmd)) {
+		cmd->result = ScsiResult(DID_ABORT, 0);
+		cmd->scsi_done(cmd);
+		restore_flags(flags);
+		return SCSI_ABORT_SUCCESS;
+	}
+
+/*
+ * Then, look in the wakeup list
+ */
+	for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
+		/*
+		**	look for the ccb of this command.
+		*/
+		if (cp->host_status == HS_IDLE) continue;
+		if (cp->cmd == cmd) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (!found) {
+		restore_flags(flags);
+		return SCSI_ABORT_NOT_RUNNING;
+	}
+
+	if (np->settle_time) {
+		restore_flags(flags);
+		return SCSI_ABORT_SNOOZE;
+	}
+
+	/*
+	**	Disable reselect.
+	**      Remove it from startqueue.
+	**	Set cp->tlimit to 0. The ncr_timeout() handler will use 
+	**	this condition in order to complete the canceled command 
+	**	after the script skipped the ccb, if necessary.
+	*/
+	cp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
+	if (cp->phys.header.launch.l_paddr ==
+		cpu_to_scr(NCB_SCRIPT_PHYS (np, select))) {
+		printf ("%s: abort ccb=%p (skip)\n", ncr_name (np), cp);
+		cp->phys.header.launch.l_paddr =
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, skip));
+	}
+
+	cp->tlimit = 0;
+	retv = SCSI_ABORT_PENDING;
+
+	/*
+	**      If there are no requests, the script
+	**      processor will sleep on SEL_WAIT_RESEL.
+	**      Let's wake it up, since it may have to work.
+	*/
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	if (!np->stalling)
+#endif
+	OUTB (nc_istat, SIGP);
+
+	restore_flags(flags);
+
+	return retv;
+}
+
+/*==========================================================
+**
+**	Linux release module stuff.
+**
+**	Called before unloading the module
+**	Detach the host.
+**	We have to free resources and halt the NCR chip
+**
+**==========================================================
+*/
+
+#ifdef MODULE
+static int ncr_detach(ncb_p np)
+{
+	ccb_p cp;
+	tcb_p tp;
+	lcb_p lp;
+	int target, lun;
+	int i;
+
+	printf("%s: releasing host resources\n", ncr_name(np));
+
+/*
+**	Stop the ncr_timeout process
+**	Set release_stage to 1 and wait that ncr_timeout() set it to 2.
+*/
+
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: stopping the timer\n", ncr_name(np));
+#endif
+	np->release_stage = 1;
+	for (i = 50 ; i && np->release_stage != 2 ; i--) DELAY(100000);
+	if (np->release_stage != 2)
+		printf("%s: the timer seems to be already stopped\n", ncr_name(np));
+	else np->release_stage = 2;
+
+/*
+**	Disable chip interrupts
+*/
+
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: disabling chip interrupts\n", ncr_name(np));
+#endif
+	OUTW (nc_sien , 0);
+	OUTB (nc_dien , 0);
+
+/*
+**	Free irq
+*/
+
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: freeing irq %d\n", ncr_name(np), np->irq);
+#endif
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
+	free_irq(np->irq, np);
+#else
+	free_irq(np->irq);
+#endif
+
+	/*
+	**	Reset NCR chip
+	**	Restore bios setting for automatic clock detection.
+	*/
+
+	printf("%s: resetting chip\n", ncr_name(np));
+	OUTB (nc_istat,  SRST);
+	DELAY (1000);
+	OUTB (nc_istat,  0   );
+
+	OUTB(nc_dmode,	np->sv_dmode);
+	OUTB(nc_dcntl,	np->sv_dcntl);
+	OUTB(nc_ctest3,	np->sv_ctest3);
+	OUTB(nc_ctest4,	np->sv_ctest4);
+	OUTB(nc_ctest5,	np->sv_ctest5);
+	OUTB(nc_gpcntl,	np->sv_gpcntl);
+	OUTB(nc_stest2,	np->sv_stest2);
+
+	ncr_selectclock(np, np->sv_scntl3);
+
+	/*
+	**	Release Memory mapped IO region and IO mapped region
+	*/
+
+#ifndef NCR_IOMAPPED
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr, 128);
+#endif
+	unmap_pci_mem((vm_offset_t) np->vaddr, (u_long) 128);
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr2, 4096);
+#endif
+	unmap_pci_mem((vm_offset_t) np->vaddr2, (u_long) 4096);
+#endif
+
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: releasing IO region %x[%d]\n", ncr_name(np), np->port, 128);
+#endif
+	release_region(np->port, 128);
+
+	/*
+	**	Free allocated ccb(s)
+	*/
+
+	while ((cp=np->ccb->link_ccb) != NULL) {
+		np->ccb->link_ccb = cp->link_ccb;
+		if (cp->host_status) {
+		printf("%s: shall free an active ccb (host_status=%d)\n",
+			ncr_name(np), cp->host_status);
+		}
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
+#endif
+		m_free(cp, sizeof(*cp));
+	}
+
+	/*
+	**	Free allocated tp(s)
+	*/
+
+	for (target = 0; target < MAX_TARGET ; target++) {
+		tp=&np->target[target];
+		for (lun = 0 ; lun < MAX_LUN ; lun++) {
+			lp = tp->lp[lun];
+			if (lp) {
+#ifdef DEBUG_NCR53C8XX
+	printf("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
+#endif
+				m_free(lp, sizeof(*lp));
+			}
+		}
+	}
+
+	printf("%s: host resources successfully released\n", ncr_name(np));
+
+	return 1;
+}
+#endif
+
+/*==========================================================
+**
+**
+**	Complete execution of a SCSI command.
+**	Signal completion to the generic SCSI driver.
+**
+**
+**==========================================================
+*/
+
+void ncr_complete (ncb_p np, ccb_p cp)
+{
+	Scsi_Cmnd *cmd;
+	tcb_p tp;
+	lcb_p lp;
+
+	/*
+	**	Sanity check
+	*/
+
+	if (!cp || (cp->magic!=CCB_MAGIC) || !cp->cmd) return;
+	cp->magic = 1;
+	cp->tlimit= 0;
+	cmd = cp->cmd;
+
+	/*
+	**	No Reselect anymore.
+	*/
+	cp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
+
+	/*
+	**	No starting.
+	*/
+	cp->phys.header.launch.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
+
+	/*
+	**	timestamp
+	**	Optional, spare some CPU time
+	*/
+#ifdef SCSI_NCR_PROFILE_SUPPORT
+	ncb_profile (np, cp);
+#endif
+
+	if (DEBUG_FLAGS & DEBUG_TINY)
+		printf ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp & 0xfff,
+			cp->host_status,cp->scsi_status);
+
+	cmd = cp->cmd;
+	cp->cmd = NULL;
+	tp = &np->target[cmd->target];
+	lp = tp->lp[cmd->lun];
+
+	/*
+	**	We donnot queue more than 1 ccb per target 
+	**	with negotiation at any time. If this ccb was 
+	**	used for negotiation, clear this info in the tcb.
+	*/
+
+	if (cp == tp->nego_cp)
+		tp->nego_cp = 0;
+
+	/*
+	**	Check for parity errors.
+	*/
+
+	if (cp->parity_status) {
+		PRINT_ADDR(cmd);
+		printf ("%d parity error(s), fallback.\n", cp->parity_status);
+		/*
+		**	fallback to asynch transfer.
+		*/
+		tp->usrsync=255;
+		tp->period =  0;
+	}
+
+	/*
+	**	Check for extended errors.
+	*/
+
+	if (cp->xerr_status != XE_OK) {
+		PRINT_ADDR(cmd);
+		switch (cp->xerr_status) {
+		case XE_EXTRA_DATA:
+			printf ("extraneous data discarded.\n");
+			break;
+		case XE_BAD_PHASE:
+			printf ("illegal scsi phase (4/5).\n");
+			break;
+		default:
+			printf ("extended error %d.\n", cp->xerr_status);
+			break;
+		}
+		if (cp->host_status==HS_COMPLETE)
+			cp->host_status = HS_FAIL;
+	}
+
+	/*
+	**	Check the status.
+	*/
+	if (   (cp->host_status == HS_COMPLETE)
+		&& (cp->scsi_status == S_GOOD ||
+		    cp->scsi_status == S_COND_MET)) {
+		/*
+		**	All went well (GOOD status).
+		**	CONDITION MET status is returned on 
+		**	`Pre-Fetch' or `Search data' success.
+		*/
+		cmd->result = ScsiResult(DID_OK, cp->scsi_status);
+
+		/*
+		** if (cp->phys.header.lastp != cp->phys.header.goalp)...
+		**
+		**	@RESID@
+		**	Could dig out the correct value for resid,
+		**	but it would be quite complicated.
+		**
+		**	The ah1542.c driver sets it to 0 too ...
+		*/
+
+		/*
+		**	Try to assign a ccb to this nexus
+		*/
+		ncr_alloc_ccb (np, cmd->target, cmd->lun);
+
+		/*
+		**	On inquire cmd (0x12) save some data.
+		**	Clear questionnable capacities.
+		*/
+		if (cmd->lun == 0 && cmd->cmnd[0] == 0x12) {
+			if (np->unit < SCSI_NCR_MAX_HOST) {
+				if (driver_setup.force_sync_nego)
+					((char *) cmd->request_buffer)[7] |= INQ7_SYNC;
+				else
+					((char *) cmd->request_buffer)[7] &=
+					(target_capabilities[np->unit].and_map[cmd->target]);
+			}
+			bcopy (	cmd->request_buffer,
+				&tp->inqdata,
+				sizeof (tp->inqdata));
+
+			/*
+			**	set number of tags
+			*/
+				ncr_setmaxtags (np, tp, driver_setup.default_tags);
+			/*
+			**	prepare negotiation of synch and wide.
+			*/
+			ncr_negotiate (np, tp);
+
+			/*
+			**	force quirks update before next command start
+			*/
+			tp->quirks |= QUIRK_UPDATE;
+		}
+
+		/*
+		**	Announce changes to the generic driver.
+		*/
+		if (lp) {
+			ncr_settags (tp, lp);
+			if (lp->reqlink != lp->actlink)
+				ncr_opennings (np, lp, cmd);
+		};
+
+		tp->bytes     += cp->data_len;
+		tp->transfers ++;
+
+		/*
+		**	If tags was reduced due to queue full,
+		**	increase tags if 100 good status received.
+		*/
+		if (tp->numtags < tp->maxtags) {
+			++tp->num_good;
+			if (tp->num_good >= 100) {
+				tp->num_good = 0;
+				++tp->numtags;
+				if (tp->numtags == 1) {
+					PRINT_ADDR(cmd);
+					printf("tagged command queueing resumed\n");
+				}
+			}
+		}
+	} else if ((cp->host_status == HS_COMPLETE)
+		&& (cp->scsi_status == (S_SENSE|S_GOOD) ||
+		    cp->scsi_status == (S_SENSE|S_CHECK_COND))) {
+
+		/*
+		**   Check condition code
+		*/
+		cmd->result = ScsiResult(DID_OK, S_CHECK_COND);
+
+		if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
+			u_char * p = (u_char*) & cmd->sense_buffer;
+			int i;
+			printf ("\n%s: sense data:", ncr_name (np));
+			for (i=0; i<14; i++) printf (" %x", *p++);
+			printf (".\n");
+		}
+
+	} else if ((cp->host_status == HS_COMPLETE)
+		&& (cp->scsi_status == S_BUSY ||
+		    cp->scsi_status == S_CONFLICT)) {
+
+		/*
+		**   Target is busy.
+		*/
+		cmd->result = ScsiResult(DID_OK, cp->scsi_status);
+
+	} else if ((cp->host_status == HS_COMPLETE)
+		&& (cp->scsi_status == S_QUEUE_FULL)) {
+
+		/*
+		**   Target is stuffed.
+		*/
+		cmd->result = ScsiResult(DID_OK, cp->scsi_status);
+
+		/*
+		**  Suspend tagged queuing and start good status counter.
+		**  Announce changes to the generic driver.
+		*/
+		if (tp->numtags) {
+			PRINT_ADDR(cmd);
+			printf("QUEUE FULL! suspending tagged command queueing\n");
+			tp->numtags	= 0;
+			tp->num_good	= 0;
+			if (lp) {
+				ncr_settags (tp, lp);
+				if (lp->reqlink != lp->actlink)
+					ncr_opennings (np, lp, cmd);
+			};
+		}
+	} else if ((cp->host_status == HS_SEL_TIMEOUT)
+		|| (cp->host_status == HS_TIMEOUT)) {
+
+		/*
+		**   No response
+		*/
+		cmd->result = ScsiResult(DID_TIME_OUT, cp->scsi_status);
+
+	} else if (cp->host_status == HS_RESET) {
+
+		/*
+		**   SCSI bus reset
+		*/
+		cmd->result = ScsiResult(DID_RESET, cp->scsi_status);
+
+	} else if (cp->host_status == HS_ABORTED) {
+
+		/*
+		**   Transfer aborted
+		*/
+		cmd->result = ScsiResult(DID_ABORT, cp->scsi_status);
+
+	} else {
+
+		/*
+		**  Other protocol messes
+		*/
+		PRINT_ADDR(cmd);
+		printf ("COMMAND FAILED (%x %x) @%p.\n",
+			cp->host_status, cp->scsi_status, cp);
+
+		cmd->result = ScsiResult(DID_ERROR, cp->scsi_status);
+	}
+
+	/*
+	**	trace output
+	*/
+
+	if (tp->usrflag & UF_TRACE) {
+		u_char * p;
+		int i;
+		PRINT_ADDR(cmd);
+		printf (" CMD:");
+		p = (u_char*) &cmd->cmnd[0];
+		for (i=0; i<cmd->cmd_len; i++) printf (" %x", *p++);
+
+		if (cp->host_status==HS_COMPLETE) {
+			switch (cp->scsi_status) {
+			case S_GOOD:
+				printf ("  GOOD");
+				break;
+			case S_CHECK_COND:
+				printf ("  SENSE:");
+				p = (u_char*) &cmd->sense_buffer;
+				for (i=0; i<14; i++)
+					printf (" %x", *p++);
+				break;
+			default:
+				printf ("  STAT: %x\n", cp->scsi_status);
+				break;
+			}
+		} else printf ("  HOSTERROR: %x", cp->host_status);
+		printf ("\n");
+	}
+
+	/*
+	**	Free this ccb
+	*/
+	ncr_free_ccb (np, cp, cmd->target, cmd->lun);
+
+	/*
+	**	requeue awaiting scsi commands
+	*/
+	if (np->waiting_list) requeue_waiting_list(np);
+
+	/*
+	**	signal completion to generic driver.
+	*/
+	cmd->scsi_done (cmd);
+}
+
+/*==========================================================
+**
+**
+**	Signal all (or one) control block done.
+**
+**
+**==========================================================
+*/
+
+void ncr_wakeup (ncb_p np, u_long code)
+{
+	/*
+	**	Starting at the default ccb and following
+	**	the links, complete all jobs with a
+	**	host_status greater than "disconnect".
+	**
+	**	If the "code" parameter is not zero,
+	**	complete all jobs that are not IDLE.
+	*/
+
+	ccb_p cp = np->ccb;
+	while (cp) {
+		switch (cp->host_status) {
+
+		case HS_IDLE:
+			break;
+
+		case HS_DISCONNECT:
+			if(DEBUG_FLAGS & DEBUG_TINY) printf ("D");
+			/* fall through */
+
+		case HS_BUSY:
+		case HS_NEGOTIATE:
+			if (!code) break;
+			cp->host_status = code;
+
+			/* fall through */
+
+		default:
+			ncr_complete (np, cp);
+			break;
+		};
+		cp = cp -> link_ccb;
+	};
+}
+
+/*==========================================================
+**
+**
+**	Start NCR chip.
+**
+**
+**==========================================================
+*/
+
+void ncr_init (ncb_p np, int reset, char * msg, u_long code)
+{
+	int	i;
+
+	/*
+	**	Reset chip if asked, otherwise just clear fifos.
+	*/
+	if (reset) {
+		OUTB (nc_istat,  SRST);
+		DELAY (10000);
+	}
+	else {
+		OUTB (nc_stest3, TE|CSF);
+		OUTONB (nc_ctest3, CLF);
+	}
+
+	/*
+	**	Message.
+	*/
+
+	if (msg) printf (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
+
+	/*
+	**	Clear Start Queue
+	*/
+	for (i=0;i<MAX_START;i++)
+		np -> squeue [i] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
+
+	/*
+	**	Start at first entry.
+	*/
+	np->squeueput = 0;
+	np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop));
+	np->script0->start0  [0] = cpu_to_scr(SCR_INT ^ IFFALSE (0));
+
+	/*
+	**	Wakeup all pending jobs.
+	*/
+	ncr_wakeup (np, code);
+
+	/*
+	**	Init chip.
+	*/
+
+	OUTB (nc_istat,  0x00   );	/*  Remove Reset, abort */
+	OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
+					/*  full arb., ena parity, par->ATN  */
+	OUTB (nc_scntl1, 0x00);		/*  odd parity, and remove CRST!! */
+
+	ncr_selectclock(np, np->rv_scntl3);	/* Select SCSI clock */
+
+	OUTB (nc_scid  , RRE|np->myaddr);	/* Adapter SCSI address */
+	OUTW (nc_respid, 1ul<<np->myaddr);	/* Id to respond to */
+	OUTB (nc_istat , SIGP	);		/*  Signal Process */
+	OUTB (nc_dmode , np->rv_dmode);		/* Burst length, dma mode */
+	OUTB (nc_ctest5, np->rv_ctest5);	/* Large fifo + large burst */
+
+	OUTB (nc_dcntl , NOCOM|np->rv_dcntl);	/* Protect SFBR */
+	OUTB (nc_ctest3, np->rv_ctest3);	/* Write and invalidate */
+	OUTB (nc_ctest4, np->rv_ctest4);	/* Master parity checking */
+
+	OUTB (nc_stest2, EXT|np->rv_stest2);	/* Extended Sreq/Sack filtering */
+	OUTB (nc_stest3, TE);			/* TolerANT enable */
+	OUTB (nc_stime0, 0x0d	);		/* HTH disabled  STO 0.4 sec. */
+
+	/*
+	**	Disable disconnects.
+	*/
+
+	np->disc = 0;
+
+	/*
+	**    Enable GPIO0 pin for writing if LED support.
+	*/
+
+	if (np->features & FE_LED0) {
+		OUTOFFB (nc_gpcntl, 0x01);
+	}
+
+	/*
+	**    Upload the script into on-board RAM
+	*/
+	if (np->vaddr2) {
+		if (bootverbose)
+			printf ("%s: copying script fragments into the on-board RAM ...\n", ncr_name(np));
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
+		memcpy_toio(np->script, np->script0, sizeof(struct script));
+#else
+		memcpy(np->script, np->script0, sizeof(struct script));
+#endif
+	}
+
+	/*
+	**      enable ints
+	*/
+
+	OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST);
+	OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
+
+	/*
+	**	For 895/6 enable SBMC interrupt and save current SCSI bus mode.
+	*/
+	if (np->features & FE_ULTRA2) {
+		OUTONW (nc_sien, SBMC);
+		np->scsi_mode = INB (nc_stest4) & SMODE;
+	}
+
+	/*
+	**	Fill in target structure.
+	**	Reinitialize usrsync.
+	**	Reinitialize usrwide.
+	**	Prepare sync negotiation according to actual SCSI bus mode.
+	*/
+
+	for (i=0;i<MAX_TARGET;i++) {
+		tcb_p tp = &np->target[i];
+
+		tp->sval    = 0;
+		tp->wval    = np->rv_scntl3;
+
+		if (tp->usrsync != 255) {
+			if (tp->usrsync <= np->maxsync) {
+				if (tp->usrsync < np->minsync) {
+					tp->usrsync = np->minsync;
+				}
+			}
+			else
+				tp->usrsync = 255;
+		};
+
+		if (tp->usrwide > np->maxwide)
+			tp->usrwide = np->maxwide;
+
+		ncr_negotiate (np, tp);
+	}
+
+	/*
+	**    Start script processor.
+	*/
+
+	OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start));
+}
+
+/*==========================================================
+**
+**	Prepare the negotiation values for wide and
+**	synchronous transfers.
+**
+**==========================================================
+*/
+
+static void ncr_negotiate (struct ncb* np, struct tcb* tp)
+{
+	/*
+	**	minsync unit is 4ns !
+	*/
+
+	u_long minsync = tp->usrsync;
+
+	/*
+	**	SCSI bus mode limit
+	*/
+
+	if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
+		if (minsync < 12) minsync = 12;
+	}
+
+	/*
+	**	if not scsi 2
+	**	don't believe FAST!
+	*/
+
+	if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2)
+		minsync=50;
+
+	/*
+	**	our limit ..
+	*/
+
+	if (minsync < np->minsync)
+		minsync = np->minsync;
+
+	/*
+	**	divider limit
+	*/
+
+	if (minsync > np->maxsync)
+		minsync = 255;
+
+	tp->minsync = minsync;
+	tp->maxoffs = (minsync<255 ? np->maxoffs : 0);
+
+	/*
+	**	period=0: has to negotiate sync transfer
+	*/
+
+	tp->period=0;
+
+	/*
+	**	widedone=0: has to negotiate wide transfer
+	*/
+	tp->widedone=0;
+}
+
+/*==========================================================
+**
+**	Get clock factor and sync divisor for a given 
+**	synchronous factor period.
+**	Returns the clock factor (in sxfer) and scntl3 
+**	synchronous divisor field.
+**
+**==========================================================
+*/
+
+static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
+{
+	u_long	clk = np->clock_khz;	/* SCSI clock frequency in kHz	*/
+	int	div = np->clock_divn;	/* Number of divisors supported	*/
+	u_long	fak;			/* Sync factor in sxfer		*/
+	u_long	per;			/* Period in tenths of ns	*/
+	u_long	kpc;			/* (per * clk)			*/
+
+	/*
+	**	Compute the synchronous period in tenths of nano-seconds
+	*/
+	if	(sfac <= 10)	per = 250;
+	else if	(sfac == 11)	per = 303;
+	else if	(sfac == 12)	per = 500;
+	else			per = 40 * sfac;
+
+	/*
+	**	Look for the greatest clock divisor that allows an 
+	**	input speed faster than the period.
+	*/
+	kpc = per * clk;
+	while (--div >= 0)
+		if (kpc >= (div_10M[div] << 2)) break;
+
+	/*
+	**	Calculate the lowest clock factor that allows an output 
+	**	speed not faster than the period.
+	*/
+	fak = (kpc - 1) / div_10M[div] + 1;
+
+#if 0	/* This optimization does not seem very usefull */
+
+	per = (fak * div_10M[div]) / clk;
+
+	/*
+	**	Why not to try the immediate lower divisor and to choose 
+	**	the one that allows the fastest output speed ?
+	**	We don't want input speed too much greater than output speed.
+	*/
+	if (div >= 1 && fak < 8) {
+		u_long fak2, per2;
+		fak2 = (kpc - 1) / div_10M[div-1] + 1;
+		per2 = (fak2 * div_10M[div-1]) / clk;
+		if (per2 < per && fak2 <= 8) {
+			fak = fak2;
+			per = per2;
+			--div;
+		}
+	}
+#endif
+
+	if (fak < 4) fak = 4;	/* Should never happen, too bad ... */
+
+	/*
+	**	Compute and return sync parameters for the ncr
+	*/
+	*fakp		= fak - 4;
+	*scntl3p	= ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
+}
+
+
+/*==========================================================
+**
+**	Set actual values, sync status and patch all ccbs of 
+**	a target according to new sync/wide agreement.
+**
+**==========================================================
+*/
+
+static void ncr_set_sync_wide_status (ncb_p np, u_char target)
+{
+	ccb_p cp;
+	tcb_p tp = &np->target[target];
+
+	/*
+	**	set actual value and sync_status
+	*/
+	OUTB (nc_sxfer, tp->sval);
+	np->sync_st = tp->sval;
+	OUTB (nc_scntl3, tp->wval);
+	np->wide_st = tp->wval;
+
+	/*
+	**	patch ALL ccbs of this target.
+	*/
+	for (cp = np->ccb; cp; cp = cp->link_ccb) {
+		if (!cp->cmd) continue;
+		if (cp->cmd->target != target) continue;
+		cp->sync_status = tp->sval;
+		cp->wide_status = tp->wval;
+	};
+}
+
+/*==========================================================
+**
+**	Switch sync mode for current job and it's target
+**
+**==========================================================
+*/
+
+static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer)
+{
+	Scsi_Cmnd *cmd;
+	tcb_p tp;
+	u_char target = INB (nc_ctest0) & 0x0f;
+	u_char idiv;
+
+	assert (cp);
+	if (!cp) return;
+
+	cmd = cp->cmd;
+	assert (cmd);
+	if (!cmd) return;
+	assert (target == (cmd->target & 0xf));
+
+	tp = &np->target[target];
+
+	if (!scntl3 || !(sxfer & 0x1f))
+		scntl3 = np->rv_scntl3;
+	scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
+
+	/*
+	**	Deduce the value of controller sync period from scntl3.
+	**	period is in tenths of nano-seconds.
+	*/
+
+	idiv = ((scntl3 >> 4) & 0x7);
+	if ((sxfer & 0x1f) && idiv)
+		tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
+	else
+		tp->period = 0xffff;
+
+	/*
+	**	 Stop there if sync parameters are unchanged
+	*/
+	if (tp->sval == sxfer && tp->wval == scntl3) return;
+	tp->sval = sxfer;
+	tp->wval = scntl3;
+
+	/*
+	**	Bells and whistles   ;-)
+	*/
+	PRINT_ADDR(cmd);
+	if (sxfer & 0x01f) {
+		unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
+		unsigned mb10 = (f10 + tp->period/2) / tp->period;
+		char *scsi;
+
+		/*
+		**  Disable extended Sreq/Sack filtering
+		*/
+		if (tp->period <= 2000) OUTOFFB (nc_stest2, EXT);
+
+		/*
+		**	Bells and whistles   ;-)
+		*/
+		if	(tp->period < 500)	scsi = "FAST-40";
+		else if	(tp->period < 1000)	scsi = "FAST-20";
+		else if	(tp->period < 2000)	scsi = "FAST-10";
+		else				scsi = "FAST-5";
+
+		printf ("%s %sSCSI %d.%d MB/s (%d ns, offset %d)\n", scsi,
+			tp->widedone > 1 ? "WIDE " : "",
+			mb10 / 10, mb10 % 10, tp->period / 10, sxfer & 0x1f);
+	} else
+		printf ("%sasynchronous.\n", tp->widedone > 1 ? "wide " : "");
+
+	/*
+	**	set actual value and sync_status
+	**	patch ALL ccbs of this target.
+	*/
+	ncr_set_sync_wide_status(np, target);
+}
+
+/*==========================================================
+**
+**	Switch wide mode for current job and it's target
+**	SCSI specs say: a SCSI device that accepts a WDTR 
+**	message shall reset the synchronous agreement to 
+**	asynchronous mode.
+**
+**==========================================================
+*/
+
+static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack)
+{
+	Scsi_Cmnd *cmd;
+	u_short target = INB (nc_ctest0) & 0x0f;
+	tcb_p tp;
+	u_char	scntl3;
+	u_char	sxfer;
+
+	assert (cp);
+	if (!cp) return;
+
+	cmd = cp->cmd;
+	assert (cmd);
+	if (!cmd) return;
+	assert (target == (cmd->target & 0xf));
+
+	tp = &np->target[target];
+	tp->widedone  =  wide+1;
+	scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
+
+	sxfer = ack ? 0 : tp->sval;
+
+	/*
+	**	 Stop there if sync/wide parameters are unchanged
+	*/
+	if (tp->sval == sxfer && tp->wval == scntl3) return;
+	tp->sval = sxfer;
+	tp->wval = scntl3;
+
+	/*
+	**	Bells and whistles   ;-)
+	*/
+	if (bootverbose >= 2) {
+		PRINT_ADDR(cmd);
+		if (scntl3 & EWS)
+			printf ("WIDE SCSI (16 bit) enabled.\n");
+		else
+			printf ("WIDE SCSI disabled.\n");
+	}
+
+	/*
+	**	set actual value and sync_status
+	**	patch ALL ccbs of this target.
+	*/
+	ncr_set_sync_wide_status(np, target);
+}
+
+/*==========================================================
+**
+**	Switch tagged mode for a target.
+**
+**==========================================================
+*/
+
+static void ncr_setmaxtags (ncb_p np, tcb_p tp, u_long numtags)
+{
+	int l;
+	if (numtags > tp->usrtags)
+		numtags = tp->usrtags;
+	tp->numtags = numtags;
+	tp->maxtags = numtags;
+
+	for (l=0; l<MAX_LUN; l++) {
+		lcb_p lp;
+		u_char wastags;
+
+		if (!tp) break;
+		lp=tp->lp[l];
+		if (!lp) continue;
+
+		wastags = lp->usetags;
+		ncr_settags (tp, lp);
+
+		if (numtags > 1 && lp->reqccbs > 1) {
+			PRINT_LUN(np, tp - np->target, l);
+			printf("using tagged command queueing, up to %ld cmds/lun\n", numtags);
+		}
+		else if (numtags <= 1 && wastags) {
+			PRINT_LUN(np, tp - np->target, l);
+			printf("disabling tagged command queueing\n");
+		}
+	};
+}
+
+static void ncr_settags (tcb_p tp, lcb_p lp)
+{
+	u_char reqtags, tmp;
+
+	if ((!tp) || (!lp)) return;
+
+	/*
+	**	only devices conformant to ANSI Version >= 2
+	**	only devices capable of tagges commands
+	**	only disk devices
+	**	only if enabled by user ..
+	*/
+	if ((  tp->inqdata[2] & 0x7) >= 2 &&
+	    (  tp->inqdata[7] & INQ7_QUEUE) && ((tp->inqdata[0] & 0x1f)==0x00)
+		&& tp->numtags > 1) {
+		reqtags = tp->numtags;
+		if (lp->actlink <= 1)
+			lp->usetags=reqtags;
+	} else {
+		reqtags = 1;
+		if (lp->actlink <= 1)
+			lp->usetags=0;
+	};
+
+	/*
+	**	don't announce more than available.
+	*/
+	tmp = lp->actccbs;
+	if (tmp > reqtags) tmp = reqtags;
+	lp->reqlink = tmp;
+
+	/*
+	**	don't discard if announced.
+	*/
+	tmp = lp->actlink;
+	if (tmp < reqtags) tmp = reqtags;
+	lp->reqccbs = tmp;
+}
+
+/*----------------------------------------------------
+**
+**	handle user commands
+**
+**----------------------------------------------------
+*/
+
+#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
+
+static void ncr_usercmd (ncb_p np)
+{
+	u_char t;
+	tcb_p tp;
+
+	switch (np->user.cmd) {
+
+	case 0: return;
+
+	case UC_SETSYNC:
+		for (t=0; t<MAX_TARGET; t++) {
+			if (!((np->user.target>>t)&1)) continue;
+			tp = &np->target[t];
+			tp->usrsync = np->user.data;
+			ncr_negotiate (np, tp);
+		};
+		break;
+
+	case UC_SETTAGS:
+		if (np->user.data > SCSI_NCR_MAX_TAGS)
+			np->user.data = SCSI_NCR_MAX_TAGS;
+		for (t=0; t<MAX_TARGET; t++) {
+			if (!((np->user.target>>t)&1)) continue;
+			np->target[t].usrtags = np->user.data;
+			ncr_setmaxtags (np, &np->target[t], np->user.data);
+		};
+		break;
+
+	case UC_SETDEBUG:
+#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
+		ncr_debug = np->user.data;
+#endif
+		break;
+
+	case UC_SETORDER:
+		np->order = np->user.data;
+		break;
+
+	case UC_SETWIDE:
+		for (t=0; t<MAX_TARGET; t++) {
+			u_long size;
+			if (!((np->user.target>>t)&1)) continue;
+			tp = &np->target[t];
+			size = np->user.data;
+			if (size > np->maxwide) size=np->maxwide;
+			tp->usrwide = size;
+			ncr_negotiate (np, tp);
+		};
+		break;
+
+	case UC_SETFLAG:
+		for (t=0; t<MAX_TARGET; t++) {
+			if (!((np->user.target>>t)&1)) continue;
+			tp = &np->target[t];
+			tp->usrflag = np->user.data;
+		};
+		break;
+
+	case UC_CLEARPROF:
+		bzero(&np->profile, sizeof(np->profile));
+		break;
+#ifdef	UC_DEBUG_ERROR_RECOVERY
+	case UC_DEBUG_ERROR_RECOVERY:
+		np->debug_error_recovery = np->user.data;
+		break;
+#endif
+	}
+	np->user.cmd=0;
+}
+#endif
+
+
+/*=====================================================================
+**
+**    Embedded error recovery debugging code.
+**
+**=====================================================================
+**
+**    This code is conditionned by SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT.
+**    It only can be enabled after boot-up with a control command.
+**
+**    Every 30 seconds the timer handler of the driver decides to 
+**    change the behaviour of the driver in order to trigger errors.
+**
+**    If last command was "debug_error_recovery sge", the driver 
+**    sets sync offset of all targets that use sync transfers to 2, 
+**    and so hopes a SCSI gross error at the next read operation.
+**
+**    If last command was "debug_error_recovery abort", the driver 
+**    does not signal new scsi commands to the script processor, until 
+**    it is asked to abort or reset a command by the mid-level driver.
+**
+**    If last command was "debug_error_recovery reset", the driver 
+**    does not signal new scsi commands to the script processor, until 
+**    it is asked to reset a command by the mid-level driver.
+**
+**    If last command was "debug_error_recovery parity", the driver 
+**    will assert ATN on the next DATA IN phase mismatch, and so will 
+**    behave as if a parity error had been detected.
+**
+**    The command "debug_error_recovery none" makes the driver behave 
+**    normaly.
+**
+**=====================================================================
+*/
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+static void ncr_trigger_errors (ncb_p np)
+{
+	/*
+	** 	If np->debug_error_recovery is not zero, we want to 
+	**	simulate common errors in order to test error recovery.
+	*/
+	do {
+		static u_long last = 0l;
+
+		if (!np->debug_error_recovery)
+			break;
+		if (!last)
+			last = jiffies;
+		else if (jiffies < last + 30*HZ)
+			break;
+		last = jiffies;
+		/*
+		 * This one triggers SCSI gross errors.
+		 */
+		if (np->debug_error_recovery == 1) {
+			int i;
+			printf("%s: testing error recovery from SCSI gross error...\n", ncr_name(np));
+			for (i = 0 ; i < MAX_TARGET ; i++) {
+				if (np->target[i].sval & 0x1f) {
+					np->target[i].sval &= ~0x1f;
+					np->target[i].sval += 2;
+				}
+			}
+		}
+		/*
+		 * This one triggers abort from the mid-level driver.
+		 */
+		else if (np->debug_error_recovery == 2) {
+			printf("%s: testing error recovery from mid-level driver abort()...\n", ncr_name(np));
+			np->stalling = 2;
+		}
+		/*
+		 * This one triggers reset from the mid-level driver.
+		 */
+		else if (np->debug_error_recovery == 3) {
+			printf("%s: testing error recovery from mid-level driver reset()...\n", ncr_name(np));
+			np->stalling = 3;
+		}
+		/*
+		 * This one set ATN on phase mismatch in DATA IN phase and so 
+		 * will behave as on scsi parity error detected.
+		 */
+		else if (np->debug_error_recovery == 4) {
+			printf("%s: testing data in parity error...\n", ncr_name(np));
+			np->assert_atn = 1;
+		}
+	} while (0);
+}
+#endif
+
+/*==========================================================
+**
+**
+**	ncr timeout handler.
+**
+**
+**==========================================================
+**
+**	Misused to keep the driver running when
+**	interrupts are not configured correctly.
+**
+**----------------------------------------------------------
+*/
+
+static void ncr_timeout (ncb_p np)
+{
+	u_long	thistime = jiffies;
+	u_long	count = 0;
+	ccb_p cp;
+	u_long flags;
+
+	/*
+	**	If release process in progress, let's go
+	**	Set the release stage from 1 to 2 to synchronize
+	**	with the release process.
+	*/
+
+	if (np->release_stage) {
+		if (np->release_stage == 1) np->release_stage = 2;
+		return;
+	}
+
+	np->timer.expires =
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+			jiffies +
+#endif
+			SCSI_NCR_TIMER_INTERVAL;
+
+	add_timer(&np->timer);
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	ncr_trigger_errors (np);
+#endif
+
+	/*
+	**	If we are resetting the ncr, wait for settle_time before 
+	**	clearing it. Then command processing will be resumed.
+	*/
+	if (np->settle_time) {
+		if (np->settle_time <= thistime) {
+			if (bootverbose > 1)
+				printf("%s: command processing resumed\n", ncr_name(np));
+			save_flags(flags); cli();
+			np->settle_time	= 0;
+			np->disc	= 1;
+			requeue_waiting_list(np);
+			restore_flags(flags);
+		}
+		return;
+	}
+
+	/*
+	**	Since the generic scsi driver only allows us 0.5 second 
+	**	to perform abort of a command, we must look at ccbs about 
+	**	every 0.25 second.
+	*/
+	if (np->lasttime + (HZ>>2) <= thistime) {
+		/*
+		**	block ncr interrupts
+		*/
+		save_flags(flags); cli();
+
+		np->lasttime = thistime;
+
+		/*
+		**	Reset profile data to avoid ugly overflow
+		**	(Limited to 1024 GB for 32 bit architecture)
+		*/
+		if (np->profile.num_kbytes > (~0UL >> 2))
+			bzero(&np->profile, sizeof(np->profile));
+
+		/*----------------------------------------------------
+		**
+		**	handle ncr chip timeouts
+		**
+		**	Assumption:
+		**	We have a chance to arbitrate for the
+		**	SCSI bus at least every 10 seconds.
+		**
+		**----------------------------------------------------
+		*/
+#if 0
+		if (thistime < np->heartbeat + HZ + HZ)
+			np->latetime = 0;
+		else
+			np->latetime++;
+#endif
+
+		/*----------------------------------------------------
+		**
+		**	handle ccb timeouts
+		**
+		**----------------------------------------------------
+		*/
+
+		for (cp=np->ccb; cp; cp=cp->link_ccb) {
+			/*
+			**	look for timed out ccbs.
+			*/
+			if (!cp->host_status) continue;
+			count++;
+			/*
+			**	Have to force ordered tag to avoid timeouts
+			*/
+			if (cp->cmd && cp->tlimit && cp->tlimit <= 
+				thistime + NCR_TIMEOUT_INCREASE + SCSI_NCR_TIMEOUT_ALERT) {
+				lcb_p lp;
+				lp = np->target[cp->cmd->target].lp[cp->cmd->lun];
+				if (lp && !lp->force_ordered_tag) {
+					lp->force_ordered_tag = 1;
+				}
+			}
+			/*
+			**	ncr_abort_command() cannot complete canceled 
+			**	commands immediately. It sets tlimit to zero 
+			**	and ask the script to skip the scsi process if 
+			**	necessary. We have to complete this work here.
+			*/
+
+			if (cp->tlimit) continue;
+
+			switch (cp->host_status) {
+
+			case HS_BUSY:
+			case HS_NEGOTIATE:
+				/*
+				** still in start queue ?
+				*/
+				if (cp->phys.header.launch.l_paddr ==
+					cpu_to_scr(NCB_SCRIPT_PHYS (np, skip)))
+					continue;
+
+				/* fall through */
+			case HS_DISCONNECT:
+				cp->host_status=HS_ABORTED;
+			};
+			cp->tag = 0;
+
+			/*
+			**	wakeup this ccb.
+			*/
+			ncr_complete (np, cp);
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+			if (!np->stalling)
+#endif
+			OUTB (nc_istat, SIGP);
+		}
+		restore_flags(flags);
+	}
+
+#ifdef SCSI_NCR_BROKEN_INTR
+	if (INB(nc_istat) & (INTF|SIP|DIP)) {
+
+		/*
+		**	Process pending interrupts.
+		*/
+		save_flags(flags); cli();
+		if (DEBUG_FLAGS & DEBUG_TINY) printf ("{");
+		ncr_exception (np);
+		if (DEBUG_FLAGS & DEBUG_TINY) printf ("}");
+		restore_flags(flags);
+	}
+#endif /* SCSI_NCR_BROKEN_INTR */
+}
+
+/*==========================================================
+**
+**	log message for real hard errors
+**
+**	"ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
+**	"	      reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
+**
+**	exception register:
+**		ds:	dstat
+**		si:	sist
+**
+**	SCSI bus lines:
+**		so:	control lines as driver by NCR.
+**		si:	control lines as seen by NCR.
+**		sd:	scsi data lines as seen by NCR.
+**
+**	wide/fastmode:
+**		sxfer:	(see the manual)
+**		scntl3:	(see the manual)
+**
+**	current script command:
+**		dsp:	script adress (relative to start of script).
+**		dbc:	first word of script command.
+**
+**	First 16 register of the chip:
+**		r0..rf
+**
+**==========================================================
+*/
+
+static void ncr_log_hard_error(ncb_p np, u_short sist, u_char dstat)
+{
+	u_int32	dsp;
+	int	script_ofs;
+	int	script_size;
+	char	*script_name;
+	u_char	*script_base;
+	int	i;
+
+	dsp	= INL (nc_dsp);
+
+	if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
+		script_ofs	= dsp - np->p_script;
+		script_size	= sizeof(struct script);
+		script_base	= (u_char *) np->script;
+		script_name	= "script";
+	}
+	else if (np->p_scripth < dsp && 
+		 dsp <= np->p_scripth + sizeof(struct scripth)) {
+		script_ofs	= dsp - np->p_scripth;
+		script_size	= sizeof(struct scripth);
+		script_base	= (u_char *) np->scripth;
+		script_name	= "scripth";
+	} else {
+		script_ofs	= dsp;
+		script_size	= 0;
+		script_base	= 0;
+		script_name	= "mem";
+	}
+
+	printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
+		ncr_name (np), (unsigned)INB (nc_ctest0)&0x0f, dstat, sist,
+		(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
+		(unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
+		(unsigned)INL (nc_dbc));
+
+	if (((script_ofs & 3) == 0) &&
+	    (unsigned)script_ofs < script_size) {
+		printf ("%s: script cmd = %08x\n", ncr_name(np),
+			(int) *(ncrcmd *)(script_base + script_ofs));
+	}
+
+        printf ("%s: regdump:", ncr_name(np));
+        for (i=0; i<16;i++)
+            printf (" %02x", (unsigned)INB_OFF(i));
+        printf (".\n");
+}
+
+/*============================================================
+**
+**	ncr chip exception handler.
+**
+**============================================================
+**
+**	In normal cases, interrupt conditions occur one at a 
+**	time. The ncr is able to stack in some extra registers 
+**	other interrupts that will occurs after the first one.
+**	But severall interrupts may occur at the same time.
+**
+**	We probably should only try to deal with the normal 
+**	case, but it seems that multiple interrupts occur in 
+**	some cases that are not abnormal at all.
+**
+**	The most frequent interrupt condition is Phase Mismatch.
+**	We should want to service this interrupt quickly.
+**	A SCSI parity error may be delivered at the same time.
+**	The SIR interrupt is not very frequent in this driver, 
+**	since the INTFLY is likely used for command completion 
+**	signaling.
+**	The Selection Timeout interrupt may be triggered with 
+**	IID and/or UDC.
+**	The SBMC interrupt (SCSI Bus Mode Change) may probably 
+**	occur at any time.
+**
+**	This handler try to deal as cleverly as possible with all
+**	the above.
+**
+**============================================================
+*/
+
+void ncr_exception (ncb_p np)
+{
+	u_char	istat, dstat;
+	u_short	sist;
+	int	i;
+
+	/*
+	**	interrupt on the fly ?
+	**	Since the global header may be copied back to a CCB 
+	**	using a posted PCI memory write, the last operation on 
+	**	the istat register is a READ in order to flush posted 
+	**	PCI commands (Btw, the 'do' loop is probably useless).
+	*/
+	istat = INB (nc_istat);
+	if (istat & INTF) {
+		do {
+			OUTB (nc_istat, (istat & SIGP) | INTF);
+			istat = INB (nc_istat);
+		} while (istat & INTF);
+		if (DEBUG_FLAGS & DEBUG_TINY) printf ("F ");
+		np->profile.num_fly++;
+		ncr_wakeup (np, 0);
+	};
+
+	if (!(istat & (SIP|DIP)))
+		return;
+
+	np->profile.num_int++;
+
+	if (istat & CABRT)
+		OUTB (nc_istat, CABRT);
+
+	/*
+	**	Steinbach's Guideline for Systems Programming:
+	**	Never test for an error condition you don't know how to handle.
+	*/
+
+	sist  = (istat & SIP) ? INW (nc_sist)  : 0;
+	dstat = (istat & DIP) ? INB (nc_dstat) : 0;
+
+	if (DEBUG_FLAGS & DEBUG_TINY)
+		printf ("<%d|%x:%x|%x:%x>",
+			(int)INB(nc_scr0),
+			dstat,sist,
+			(unsigned)INL(nc_dsp),
+			(unsigned)INL(nc_dbc));
+
+	/*========================================================
+	**	First, interrupts we want to service cleanly.
+	**
+	**	Phase mismatch is the most frequent interrupt, and 
+	**	so we have to service it as quickly and as cleanly 
+	**	as possible.
+	**	Programmed interrupts are rarely used in this driver,
+	**	but we must handle them cleanly anyway.
+	**	We try to deal with PAR and SBMC combined with 
+	**	some other interrupt(s).
+	**=========================================================
+	*/
+
+	if (!(sist  & (STO|GEN|HTH|SGE|UDC|RST)) &&
+	    !(dstat & (MDPE|BF|ABRT|IID))) {
+		if ((sist & SBMC) && ncr_int_sbmc (np))
+			return;
+		if ((sist & PAR)  && ncr_int_par  (np))
+			return;
+		if (sist & MA) {
+			ncr_int_ma (np);
+			return;
+		}
+		if (dstat & SIR) {
+			ncr_int_sir (np);
+			return;
+		}
+		/*
+		**  DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
+		*/
+		if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
+			printf(	"%s: unknown interrupt(s) ignored, "
+				"ISTAT=%x DSTAT=%x SIST=%x\n",
+				ncr_name(np), istat, dstat, sist);
+			return;
+		}
+
+		OUTONB (nc_dcntl, (STD|NOCOM));
+		return;
+	};
+
+	/*========================================================
+	**	Now, interrupts that need some fixing up.
+	**	Order and multiple interrupts is so less important.
+	**
+	**	If SRST has been asserted, we just reset the chip.
+	**
+	**	Selection is intirely handled by the chip. If the 
+	**	chip says STO, we trust it. Seems some other 
+	**	interrupts may occur at the same time (UDC, IID), so 
+	**	we ignore them. In any case we do enough fix-up 
+	**	in the service routine.
+	**	We just exclude some fatal dma errors.
+	**=========================================================
+	*/
+
+	if (sist & RST) {
+		ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
+		return;
+	};
+
+	if ((sist & STO) &&
+		!(dstat & (MDPE|BF|ABRT))) {
+	/*
+	**	DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
+	*/
+		OUTONB (nc_ctest3, CLF);
+
+		ncr_int_sto (np);
+		return;
+	};
+
+	/*=========================================================
+	**	Now, interrupts we are not able to recover cleanly.
+	**	(At least for the moment).
+	**
+	**	Do the register dump.
+	**	Log message for real hard errors.
+	**	Clear all fifos.
+	**	For MDPE, BF, ABORT, IID, SGE and HTH we reset the 
+	**	BUS and the chip.
+	**	We are more soft for UDC.
+	**=========================================================
+	*/
+	if (jiffies - np->regtime > 10*HZ) {
+		np->regtime = jiffies;
+		for (i = 0; i<sizeof(np->regdump); i++)
+			((char*)&np->regdump)[i] = INB_OFF(i);
+		np->regdump.nc_dstat = dstat;
+		np->regdump.nc_sist  = sist;
+	};
+
+	ncr_log_hard_error(np, sist, dstat);
+
+	printf ("%s: have to clear fifos.\n", ncr_name (np));
+	OUTB (nc_stest3, TE|CSF);
+	OUTONB (nc_ctest3, CLF);
+
+	if ((sist & (SGE)) ||
+		(dstat & (MDPE|BF|ABORT|IID))) {
+		ncr_start_reset(np, driver_setup.settle_delay);
+		return;
+	};
+
+	if (sist & HTH) {
+		printf ("%s: handshake timeout\n", ncr_name(np));
+		ncr_start_reset(np, driver_setup.settle_delay);
+		return;
+	};
+
+	if (sist & UDC) {
+		printf ("%s: unexpected disconnect\n", ncr_name(np));
+		if (INB (nc_scr1) != 0xff) {
+			OUTB (nc_scr1, HS_UNEXPECTED);
+			OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup));
+		};
+		ncr_start_reset(np, driver_setup.settle_delay);
+		return;
+	};
+
+	/*=========================================================
+	**	We just miss the cause of the interrupt. :(
+	**	Print a message. The timeout will do the real work.
+	**=========================================================
+	*/
+	printf ("%s: unknown interrupt\n", ncr_name(np));
+}
+
+/*==========================================================
+**
+**	ncr chip exception handler for selection timeout
+**
+**==========================================================
+**
+**	There seems to be a bug in the 53c810.
+**	Although a STO-Interrupt is pending,
+**	it continues executing script commands.
+**	But it will fail and interrupt (IID) on
+**	the next instruction where it's looking
+**	for a valid phase.
+**
+**----------------------------------------------------------
+*/
+
+void ncr_int_sto (ncb_p np)
+{
+	u_long dsa, scratcha, diff;
+	ccb_p cp;
+	if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
+
+	/*
+	**	look for ccb and set the status.
+	*/
+
+	dsa = INL (nc_dsa);
+	cp = np->ccb;
+	while (cp && (CCB_PHYS (cp, phys) != dsa))
+		cp = cp->link_ccb;
+
+	if (cp) {
+		cp-> host_status = HS_SEL_TIMEOUT;
+		ncr_complete (np, cp);
+	};
+
+	/*
+	**	repair start queue
+	*/
+
+	scratcha = INL (nc_scratcha);
+	diff = scratcha - NCB_SCRIPTH_PHYS (np, tryloop);
+
+/*	assert ((diff <= MAX_START * 20) && !(diff % 20));*/
+
+	if ((diff <= MAX_START * 20) && !(diff % 20)) {
+		np->script->startpos[0] = cpu_to_scr(scratcha);
+		OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start));
+		return;
+	};
+	ncr_init (np, 1, "selection timeout", HS_FAIL);
+	np->disc = 1;
+}
+
+/*==========================================================
+**
+**	ncr chip exception handler for SCSI bus mode change
+**
+**==========================================================
+**
+**	spi2-r12 11.2.3 says a transceiver mode change must 
+**	generate a reset event and a device that detects a reset 
+**	event shall initiate a hard reset. It says also that a
+**	device that detects a mode change shall set data transfer 
+**	mode to eight bit asynchronous, etc...
+**	So, just resetting should be enough.
+**	 
+**
+**----------------------------------------------------------
+*/
+
+static int ncr_int_sbmc (ncb_p np)
+{
+	u_char scsi_mode = INB (nc_stest4) & SMODE;
+
+	printf("%s: SCSI bus mode change from %x to %x.\n",
+		ncr_name(np), np->scsi_mode, scsi_mode);
+
+	np->scsi_mode = scsi_mode;
+
+	/*
+	**	Suspend command processing for 1 second and 
+	**	reinitialize all except the chip.
+	*/
+	np->settle_time	= jiffies + HZ;
+	ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
+
+	return 1;
+}
+
+/*==========================================================
+**
+**	ncr chip exception handler for SCSI parity error.
+**
+**==========================================================
+**
+**	SCSI parity errors are handled by the SCSI script.
+**	So, we just print some message.
+**
+**----------------------------------------------------------
+*/
+
+static int ncr_int_par (ncb_p np)
+{
+	printf("%s: SCSI parity error detected\n", ncr_name(np));
+	return 0;
+}
+
+/*==========================================================
+**
+**
+**	ncr chip exception handler for phase errors.
+**
+**
+**==========================================================
+**
+**	We have to construct a new transfer descriptor,
+**	to transfer the rest of the current block.
+**
+**----------------------------------------------------------
+*/
+
+static void ncr_int_ma (ncb_p np)
+{
+	u_int32	dbc;
+	u_int32	rest;
+	u_int32	dsp;
+	u_int32	dsa;
+	u_int32	nxtdsp;
+	u_int32	*vdsp;
+	u_int32	oadr, olen;
+	u_int32	*tblp;
+        ncrcmd *newcmd;
+	u_char	cmd, sbcl;
+	ccb_p	cp;
+
+	dsp	= INL (nc_dsp);
+	dbc	= INL (nc_dbc);
+	sbcl	= INB (nc_sbcl);
+
+	cmd	= dbc >> 24;
+	rest	= dbc & 0xffffff;
+
+	/*
+	**	Take into account dma fifo and various buffers and latches,
+	**	only if the interrupted phase is an OUTPUT phase.
+	*/
+
+	if ((cmd & 1) == 0) {
+		u_char	ctest5, ss0, ss2;
+		u_short	delta;
+
+		ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
+		if (ctest5 & DFS)
+			delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
+		else
+			delta=(INB (nc_dfifo) - rest) & 0x7f;
+
+		/*
+		**	The data in the dma fifo has not been transfered to
+		**	the target -> add the amount to the rest
+		**	and clear the data.
+		**	Check the sstat2 register in case of wide transfer.
+		*/
+
+		rest += delta;
+		ss0  = INB (nc_sstat0);
+		if (ss0 & OLF) rest++;
+		if (ss0 & ORF) rest++;
+		if (INB(nc_scntl3) & EWS) {
+			ss2 = INB (nc_sstat2);
+			if (ss2 & OLF1) rest++;
+			if (ss2 & ORF1) rest++;
+		};
+
+		OUTONB (nc_ctest3, CLF );	/* clear dma fifo  */
+		OUTB (nc_stest3, TE|CSF);	/* clear scsi fifo */
+
+		if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
+			printf ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7,
+				(unsigned) rest, (unsigned) delta, ss0);
+
+	} else	{
+		if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
+			printf ("P%x%x RL=%d ", cmd&7, sbcl&7, rest);
+		if ((cmd & 7) != 1) {
+			OUTONB (nc_ctest3, CLF );
+			OUTB (nc_stest3, TE|CSF);
+		}
+	}
+
+	/*
+	**	locate matching cp
+	*/
+	dsa = INL (nc_dsa);
+	cp  = np->ccb;
+	while (cp && (CCB_PHYS (cp, phys) != dsa))
+		cp = cp->link_ccb;
+
+	if (!cp) {
+	    printf ("%s: SCSI phase error fixup: CCB already dequeued (0x%08lx)\n", 
+		    ncr_name (np), (u_long) np->header.cp);
+	    return;
+	}
+	if (cp != np->header.cp) {
+	    printf ("%s: SCSI phase error fixup: CCB address mismatch (0x%08lx != 0x%08lx)\n", 
+		    ncr_name (np), (u_long) cp, (u_long) np->header.cp);
+/*	    return;*/
+	}
+
+	/*
+	**	find the interrupted script command,
+	**	and the address at which to continue.
+	*/
+
+	if (dsp == vtophys (&cp->patch[2])) {
+		vdsp = &cp->patch[0];
+		nxtdsp = vdsp[3];
+	} else if (dsp == vtophys (&cp->patch[6])) {
+		vdsp = &cp->patch[4];
+		nxtdsp = vdsp[3];
+	} else if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
+		vdsp = (u_int32 *) ((char*)np->script - np->p_script + dsp -8);
+		nxtdsp = dsp;
+	} else {
+		vdsp = (u_int32 *) ((char*)np->scripth - np->p_scripth + dsp -8);
+		nxtdsp = dsp;
+	};
+
+	/*
+	**	log the information
+	*/
+
+	if (DEBUG_FLAGS & DEBUG_PHASE) {
+		printf ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
+			cp, np->header.cp,
+			(unsigned)dsp,
+			(unsigned)nxtdsp, vdsp, cmd);
+	};
+
+	/*
+	**	get old startaddress and old length.
+	*/
+
+	oadr = scr_to_cpu(vdsp[1]);
+
+	if (cmd & 0x10) {	/* Table indirect */
+		tblp = (u_int32 *) ((char*) &cp->phys + oadr);
+		olen = scr_to_cpu(tblp[0]);
+		oadr = scr_to_cpu(tblp[1]);
+	} else {
+		tblp = (u_int32 *) 0;
+		olen = scr_to_cpu(vdsp[0]) & 0xffffff;
+	};
+
+	if (DEBUG_FLAGS & DEBUG_PHASE) {
+		printf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
+			(unsigned) (scr_to_cpu(vdsp[0]) >> 24),
+			tblp,
+			(unsigned) olen,
+			(unsigned) oadr);
+	};
+
+	/*
+	**	check cmd against assumed interrupted script command.
+	*/
+
+	if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) {
+		PRINT_ADDR(cp->cmd);
+		printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
+			(unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24);
+		
+		return;
+	}
+
+#ifdef	SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
+	if ((cmd & 7) == 1 && np->assert_atn) {
+		np->assert_atn = 0;
+		OUTONB(nc_socl, CATN);
+	}
+#endif
+
+	/*
+	**	if old phase not dataphase, leave here.
+	*/
+
+	if (cmd & 0x06) {
+		PRINT_ADDR(cp->cmd);
+		printf ("phase change %x-%x %d@%08x resid=%d.\n",
+			cmd&7, sbcl&7, (unsigned)olen,
+			(unsigned)oadr, (unsigned)rest);
+
+		OUTONB (nc_dcntl, (STD|NOCOM));
+		return;
+	};
+
+	/*
+	**	choose the correct patch area.
+	**	if savep points to one, choose the other.
+	*/
+
+	newcmd = cp->patch;
+	if (cp->phys.header.savep == cpu_to_scr(vtophys (newcmd))) newcmd+=4;
+
+	/*
+	**	fillin the commands
+	*/
+
+	newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest);
+	newcmd[1] = cpu_to_scr(oadr + olen - rest);
+	newcmd[2] = cpu_to_scr(SCR_JUMP);
+	newcmd[3] = cpu_to_scr(nxtdsp);
+
+	if (DEBUG_FLAGS & DEBUG_PHASE) {
+		PRINT_ADDR(cp->cmd);
+		printf ("newcmd[%d] %x %x %x %x.\n",
+			(int) (newcmd - cp->patch),
+			(unsigned)scr_to_cpu(newcmd[0]),
+			(unsigned)scr_to_cpu(newcmd[1]),
+			(unsigned)scr_to_cpu(newcmd[2]),
+			(unsigned)scr_to_cpu(newcmd[3]));
+	}
+	/*
+	**	fake the return address (to the patch).
+	**	and restart script processor at dispatcher.
+	*/
+	np->profile.num_break++;
+	OUTL (nc_temp, vtophys (newcmd));
+	if ((cmd & 7) == 0)
+		OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
+	else
+		OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, checkatn));
+}
+
+/*==========================================================
+**
+**
+**      ncr chip exception handler for programmed interrupts.
+**
+**
+**==========================================================
+*/
+
+static int ncr_show_msg (u_char * msg)
+{
+	u_char i;
+	printf ("%x",*msg);
+	if (*msg==M_EXTENDED) {
+		for (i=1;i<8;i++) {
+			if (i-1>msg[1]) break;
+			printf ("-%x",msg[i]);
+		};
+		return (i+1);
+	} else if ((*msg & 0xf0) == 0x20) {
+		printf ("-%x",msg[1]);
+		return (2);
+	};
+	return (1);
+}
+
+void ncr_int_sir (ncb_p np)
+{
+	u_char scntl3;
+	u_char chg, ofs, per, fak, wide;
+	u_char num = INB (nc_dsps);
+	ccb_p	cp=0;
+	u_long	dsa;
+	u_char	target = INB (nc_ctest0) & 0x0f;
+	tcb_p	tp     = &np->target[target];
+	int     i;
+	if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
+
+	switch (num) {
+	case SIR_SENSE_RESTART:
+	case SIR_STALL_RESTART:
+		break;
+	case SIR_STALL_QUEUE:	/* Ignore, just restart the script */
+		goto out;
+
+	default:
+		/*
+		**	lookup the ccb
+		*/
+		dsa = INL (nc_dsa);
+		cp = np->ccb;
+		while (cp && (CCB_PHYS (cp, phys) != dsa))
+			cp = cp->link_ccb;
+
+		assert (cp);
+		if (!cp)
+			goto out;
+		assert (cp == np->header.cp);
+		if (cp != np->header.cp)
+			goto out;
+	}
+
+	switch (num) {
+		u_long endp;
+	case SIR_DATA_IO_IS_OUT:
+	case SIR_DATA_IO_IS_IN:
+/*
+**	We did not guess the direction of transfer. We have to wait for 
+**	actual data direction driven by the target before setting 
+**	pointers. We must patch the global header too.
+*/
+		if (num == SIR_DATA_IO_IS_OUT) {
+			endp = NCB_SCRIPTH_PHYS (np, data_out) + MAX_SCATTER*16;
+			cp->phys.header.goalp = cpu_to_scr(endp + 8);
+			cp->phys.header.savep =
+				cpu_to_scr(endp - cp->segments*16);
+		} else {
+			endp = NCB_SCRIPT_PHYS (np, data_in)  + MAX_SCATTER*16;
+			cp->phys.header.goalp = cpu_to_scr(endp + 8);
+			cp->phys.header.savep =
+				cpu_to_scr(endp - cp->segments*16);
+		}
+
+		cp->phys.header.lastp	= cp->phys.header.savep;
+		np->header.savep	= cp->phys.header.savep;
+		np->header.goalp	= cp->phys.header.goalp;
+		np->header.lastp	= cp->phys.header.lastp;
+
+		OUTL (nc_temp,	scr_to_cpu(np->header.savep));
+		OUTL (nc_dsp,	scr_to_cpu(np->header.savep));
+		return;
+		/* break; */
+
+/*--------------------------------------------------------------------
+**
+**	Processing of interrupted getcc selects
+**
+**--------------------------------------------------------------------
+*/
+
+	case SIR_SENSE_RESTART:
+		/*------------------------------------------
+		**	Script processor is idle.
+		**	Look for interrupted "check cond"
+		**------------------------------------------
+		*/
+
+		if (DEBUG_FLAGS & DEBUG_RESTART)
+			printf ("%s: int#%d",ncr_name (np),num);
+		cp = (ccb_p) 0;
+		for (i=0; i<MAX_TARGET; i++) {
+			if (DEBUG_FLAGS & DEBUG_RESTART) printf (" t%d", i);
+			tp = &np->target[i];
+			if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
+			cp = tp->hold_cp;
+			if (!cp) continue;
+			if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
+			if ((cp->host_status==HS_BUSY) &&
+				(cp->scsi_status==S_CHECK_COND))
+				break;
+			if (DEBUG_FLAGS & DEBUG_RESTART) printf ("- (remove)");
+			tp->hold_cp = cp = (ccb_p) 0;
+		};
+
+		if (cp) {
+			if (DEBUG_FLAGS & DEBUG_RESTART)
+				printf ("+ restart job ..\n");
+			OUTL (nc_dsa, CCB_PHYS (cp, phys));
+			OUTL (nc_dsp, NCB_SCRIPTH_PHYS (np, getcc));
+			return;
+		};
+
+		/*
+		**	no job, resume normal processing
+		*/
+		if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n");
+		np->script->start0[0] =  cpu_to_scr(SCR_INT ^ IFFALSE (0));
+		break;
+
+	case SIR_SENSE_FAILED:
+		/*-------------------------------------------
+		**	While trying to select for
+		**	getting the condition code,
+		**	a target reselected us.
+		**-------------------------------------------
+		*/
+		if (DEBUG_FLAGS & DEBUG_RESTART) {
+			PRINT_ADDR(cp->cmd);
+			printf ("in getcc reselect by t%d.\n",
+				(int)INB(nc_ssid) & 0x0f);
+		}
+
+		/*
+		**	Mark this job
+		*/
+		cp->host_status = HS_BUSY;
+		cp->scsi_status = S_CHECK_COND;
+		np->target[cp->cmd->target].hold_cp = cp;
+
+		/*
+		**	And patch code to restart it.
+		*/
+		np->script->start0[0] =  cpu_to_scr(SCR_INT);
+		break;
+
+/*-----------------------------------------------------------------------------
+**
+**	Was Sie schon immer ueber transfermode negotiation wissen wollten ...
+**
+**	We try to negotiate sync and wide transfer only after
+**	a successfull inquire command. We look at byte 7 of the
+**	inquire data to determine the capabilities of the target.
+**
+**	When we try to negotiate, we append the negotiation message
+**	to the identify and (maybe) simple tag message.
+**	The host status field is set to HS_NEGOTIATE to mark this
+**	situation.
+**
+**	If the target doesn't answer this message immidiately
+**	(as required by the standard), the SIR_NEGO_FAIL interrupt
+**	will be raised eventually.
+**	The handler removes the HS_NEGOTIATE status, and sets the
+**	negotiated value to the default (async / nowide).
+**
+**	If we receive a matching answer immediately, we check it
+**	for validity, and set the values.
+**
+**	If we receive a Reject message immediately, we assume the
+**	negotiation has failed, and fall back to standard values.
+**
+**	If we receive a negotiation message while not in HS_NEGOTIATE
+**	state, it's a target initiated negotiation. We prepare a
+**	(hopefully) valid answer, set our parameters, and send back 
+**	this answer to the target.
+**
+**	If the target doesn't fetch the answer (no message out phase),
+**	we assume the negotiation has failed, and fall back to default
+**	settings.
+**
+**	When we set the values, we adjust them in all ccbs belonging 
+**	to this target, in the controller's register, and in the "phys"
+**	field of the controller's struct ncb.
+**
+**	Possible cases:		   hs  sir   msg_in value  send   goto
+**	We try to negotiate:
+**	-> target doesnt't msgin   NEG FAIL  noop   defa.  -      dispatch
+**	-> target rejected our msg NEG FAIL  reject defa.  -      dispatch
+**	-> target answered  (ok)   NEG SYNC  sdtr   set    -      clrack
+**	-> target answered (!ok)   NEG SYNC  sdtr   defa.  REJ--->msg_bad
+**	-> target answered  (ok)   NEG WIDE  wdtr   set    -      clrack
+**	-> target answered (!ok)   NEG WIDE  wdtr   defa.  REJ--->msg_bad
+**	-> any other msgin	   NEG FAIL  noop   defa.  -      dispatch
+**
+**	Target tries to negotiate:
+**	-> incoming message	   --- SYNC  sdtr   set    SDTR   -
+**	-> incoming message	   --- WIDE  wdtr   set    WDTR   -
+**      We sent our answer:
+**	-> target doesn't msgout   --- PROTO ?      defa.  -      dispatch
+**
+**-----------------------------------------------------------------------------
+*/
+
+	case SIR_NEGO_FAILED:
+		/*-------------------------------------------------------
+		**
+		**	Negotiation failed.
+		**	Target doesn't send an answer message,
+		**	or target rejected our message.
+		**
+		**      Remove negotiation request.
+		**
+		**-------------------------------------------------------
+		*/
+		OUTB (HS_PRT, HS_BUSY);
+
+		/* fall through */
+
+	case SIR_NEGO_PROTO:
+		/*-------------------------------------------------------
+		**
+		**	Negotiation failed.
+		**	Target doesn't fetch the answer message.
+		**
+		**-------------------------------------------------------
+		*/
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("negotiation failed sir=%x status=%x.\n",
+				num, cp->nego_status);
+		};
+
+		/*
+		**	any error in negotiation:
+		**	fall back to default mode.
+		*/
+		switch (cp->nego_status) {
+
+		case NS_SYNC:
+			ncr_setsync (np, cp, 0, 0xe0);
+			break;
+
+		case NS_WIDE:
+			ncr_setwide (np, cp, 0, 0);
+			break;
+
+		};
+		np->msgin [0] = M_NOOP;
+		np->msgout[0] = M_NOOP;
+		cp->nego_status = 0;
+		OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
+		break;
+
+	case SIR_NEGO_SYNC:
+		/*
+		**	Synchronous request message received.
+		*/
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("sync msgin: ");
+			(void) ncr_show_msg (np->msgin);
+			printf (".\n");
+		};
+
+		/*
+		**	get requested values.
+		*/
+
+		chg = 0;
+		per = np->msgin[3];
+		ofs = np->msgin[4];
+		if (ofs==0) per=255;
+
+		/*
+		**      if target sends SDTR message,
+		**	      it CAN transfer synch.
+		*/
+
+		if (ofs)
+			tp->inqdata[7] |= INQ7_SYNC;
+
+		/*
+		**	check values against driver limits.
+		*/
+
+		if (per < np->minsync)
+			{chg = 1; per = np->minsync;}
+		if (per < tp->minsync)
+			{chg = 1; per = tp->minsync;}
+		if (ofs > tp->maxoffs)
+			{chg = 1; ofs = tp->maxoffs;}
+
+		/*
+		**	Check against controller limits.
+		*/
+		fak	= 7;
+		scntl3	= 0;
+		if (ofs != 0) {
+			ncr_getsync(np, per, &fak, &scntl3);
+			if (fak > 7) {
+				chg = 1;
+				ofs = 0;
+			}
+		}
+		if (ofs == 0) {
+			fak	= 7;
+			per	= 0;
+			scntl3	= 0;
+			tp->minsync = 0;
+		}
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("sync: per=%d scntl3=0x%x ofs=%d fak=%d chg=%d.\n",
+				per, scntl3, ofs, fak, chg);
+		}
+
+		if (INB (HS_PRT) == HS_NEGOTIATE) {
+			OUTB (HS_PRT, HS_BUSY);
+			switch (cp->nego_status) {
+
+			case NS_SYNC:
+				/*
+				**      This was an answer message
+				*/
+				if (chg) {
+					/*
+					**	Answer wasn't acceptable.
+					*/
+					ncr_setsync (np, cp, 0, 0xe0);
+					OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
+				} else {
+					/*
+					**	Answer is ok.
+					*/
+					ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
+					OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
+				};
+				return;
+
+			case NS_WIDE:
+				ncr_setwide (np, cp, 0, 0);
+				break;
+			};
+		};
+
+		/*
+		**	It was a request.
+		**      Check against the table of target capabilities.
+		**      If target not capable force M_REJECT and asynchronous.
+		*/
+		if (np->unit < SCSI_NCR_MAX_HOST) {
+			tp->inqdata[7] &=
+				(target_capabilities[np->unit].and_map[target]);
+			if (!(tp->inqdata[7] & INQ7_SYNC)) {
+				ofs = 0;
+				fak = 7;
+			}
+		}
+
+		/*
+		**	It was a request. Set value and
+		**      prepare an answer message
+		*/
+
+		ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
+
+		np->msgout[0] = M_EXTENDED;
+		np->msgout[1] = 3;
+		np->msgout[2] = M_X_SYNC_REQ;
+		np->msgout[3] = per;
+		np->msgout[4] = ofs;
+
+		cp->nego_status = NS_SYNC;
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("sync msgout: ");
+			(void) ncr_show_msg (np->msgout);
+			printf (".\n");
+		}
+
+		if (!ofs) {
+			OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
+			return;
+		}
+		np->msgin [0] = M_NOOP;
+
+		break;
+
+	case SIR_NEGO_WIDE:
+		/*
+		**	Wide request message received.
+		*/
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("wide msgin: ");
+			(void) ncr_show_msg (np->msgin);
+			printf (".\n");
+		};
+
+		/*
+		**	get requested values.
+		*/
+
+		chg  = 0;
+		wide = np->msgin[3];
+
+		/*
+		**      if target sends WDTR message,
+		**	      it CAN transfer wide.
+		*/
+
+		if (wide)
+			tp->inqdata[7] |= INQ7_WIDE16;
+
+		/*
+		**	check values against driver limits.
+		*/
+
+		if (wide > tp->usrwide)
+			{chg = 1; wide = tp->usrwide;}
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("wide: wide=%d chg=%d.\n", wide, chg);
+		}
+
+		if (INB (HS_PRT) == HS_NEGOTIATE) {
+			OUTB (HS_PRT, HS_BUSY);
+			switch (cp->nego_status) {
+
+			case NS_WIDE:
+				/*
+				**      This was an answer message
+				*/
+				if (chg) {
+					/*
+					**	Answer wasn't acceptable.
+					*/
+					ncr_setwide (np, cp, 0, 1);
+					OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
+				} else {
+					/*
+					**	Answer is ok.
+					*/
+					ncr_setwide (np, cp, wide, 1);
+					OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
+				};
+				return;
+
+			case NS_SYNC:
+				ncr_setsync (np, cp, 0, 0xe0);
+				break;
+			};
+		};
+
+		/*
+		**	It was a request, set value and
+		**      prepare an answer message
+		*/
+
+		ncr_setwide (np, cp, wide, 1);
+
+		np->msgout[0] = M_EXTENDED;
+		np->msgout[1] = 2;
+		np->msgout[2] = M_X_WIDE_REQ;
+		np->msgout[3] = wide;
+
+		np->msgin [0] = M_NOOP;
+
+		cp->nego_status = NS_WIDE;
+
+		if (DEBUG_FLAGS & DEBUG_NEGO) {
+			PRINT_ADDR(cp->cmd);
+			printf ("wide msgout: ");
+			(void) ncr_show_msg (np->msgin);
+			printf (".\n");
+		}
+		break;
+
+/*--------------------------------------------------------------------
+**
+**	Processing of special messages
+**
+**--------------------------------------------------------------------
+*/
+
+	case SIR_REJECT_RECEIVED:
+		/*-----------------------------------------------
+		**
+		**	We received a M_REJECT message.
+		**
+		**-----------------------------------------------
+		*/
+
+		PRINT_ADDR(cp->cmd);
+		printf ("M_REJECT received (%x:%x).\n",
+			(unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
+		break;
+
+	case SIR_REJECT_SENT:
+		/*-----------------------------------------------
+		**
+		**	We received an unknown message
+		**
+		**-----------------------------------------------
+		*/
+
+		PRINT_ADDR(cp->cmd);
+		printf ("M_REJECT sent for ");
+		(void) ncr_show_msg (np->msgin);
+		printf (".\n");
+		break;
+
+/*--------------------------------------------------------------------
+**
+**	Processing of special messages
+**
+**--------------------------------------------------------------------
+*/
+
+	case SIR_IGN_RESIDUE:
+		/*-----------------------------------------------
+		**
+		**	We received an IGNORE RESIDUE message,
+		**	which couldn't be handled by the script.
+		**
+		**-----------------------------------------------
+		*/
+
+		PRINT_ADDR(cp->cmd);
+		printf ("M_IGN_RESIDUE received, but not yet implemented.\n");
+		break;
+
+	case SIR_MISSING_SAVE:
+		/*-----------------------------------------------
+		**
+		**	We received an DISCONNECT message,
+		**	but the datapointer wasn't saved before.
+		**
+		**-----------------------------------------------
+		*/
+
+		PRINT_ADDR(cp->cmd);
+		printf ("M_DISCONNECT received, but datapointer not saved: "
+			"data=%x save=%x goal=%x.\n",
+			(unsigned) INL (nc_temp),
+			(unsigned) scr_to_cpu(np->header.savep),
+			(unsigned) scr_to_cpu(np->header.goalp));
+		break;
+
+#if 0   /* This stuff does not work */
+/*--------------------------------------------------------------------
+**
+**	Processing of a "S_QUEUE_FULL" status.
+**
+**	The current command has been rejected,
+**	because there are too many in the command queue.
+**	We have started too many commands for that target.
+**
+**	If possible, reinsert at head of queue.
+**	Stall queue until there are no disconnected jobs
+**	(ncr is REALLY idle). Then restart processing.
+**
+**	We should restart the current job after the controller
+**	has become idle. But this is not yet implemented.
+**
+**--------------------------------------------------------------------
+*/
+	case SIR_STALL_QUEUE:
+		/*-----------------------------------------------
+		**
+		**	Stall the start queue.
+		**
+		**-----------------------------------------------
+		*/
+		PRINT_ADDR(cp->cmd);
+		printf ("queue full.\n");
+
+		np->script->start1[0] =  cpu_to_scr(SCR_INT);
+
+		/*
+		**	Try to disable tagged transfers.
+		*/
+		ncr_setmaxtags (np, &np->target[target], 0);
+
+		/*
+		** @QUEUE@
+		**
+		**	Should update the launch field of the
+		**	current job to be able to restart it.
+		**	Then prepend it to the start queue.
+		*/
+
+		/* fall through */
+
+	case SIR_STALL_RESTART:
+		/*-----------------------------------------------
+		**
+		**	Enable selecting again,
+		**	if NO disconnected jobs.
+		**
+		**-----------------------------------------------
+		*/
+		/*
+		**	Look for a disconnected job.
+		*/
+		cp = np->ccb;
+		while (cp && cp->host_status != HS_DISCONNECT)
+			cp = cp->link_ccb;
+
+		/*
+		**	if there is one, ...
+		*/
+		if (cp) {
+			/*
+			**	wait for reselection
+			*/
+			OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, reselect));
+			return;
+		};
+
+		/*
+		**	else remove the interrupt.
+		*/
+
+		printf ("%s: queue empty.\n", ncr_name (np));
+		np->script->start1[0] =  cpu_to_scr(SCR_INT ^ IFFALSE (0));
+		break;
+#endif   /* This stuff does not work */
+	};
+
+out:
+	OUTONB (nc_dcntl, (STD|NOCOM));
+}
+
+/*==========================================================
+**
+**
+**	Aquire a control block
+**
+**
+**==========================================================
+*/
+
+static	ccb_p ncr_get_ccb
+	(ncb_p np, u_long target, u_long lun)
+{
+	lcb_p lp;
+	ccb_p cp = (ccb_p) 0;
+
+	/*
+	**	Lun structure available ?
+	*/
+
+	lp = np->target[target].lp[lun];
+
+	if (lp && lp->opennings && (!lp->active || lp->active < lp->reqlink)) {
+
+		cp = lp->next_ccb;
+
+		/*
+		**	Look for free CCB
+		*/
+
+		while (cp && cp->magic) cp = cp->next_ccb;
+
+		/*
+		**	Increment active commands and decrement credit.
+		*/
+
+		if (cp) {
+			++lp->active;
+			--lp->opennings;
+		}
+	}
+
+	/*
+	**	if nothing available, take the default.
+	**	DANGEROUS, because this ccb is not suitable for
+	**	reselection.
+	**	If lp->actccbs > 0 wait for a suitable ccb to be free.
+	*/
+	if ((!cp) && lp && lp->actccbs > 0)
+		return ((ccb_p) 0);
+
+	if (!cp) cp = np->ccb;
+
+	/*
+	**	Wait until available.
+	*/
+#if 0
+	while (cp->magic) {
+		if (flags & SCSI_NOSLEEP) break;
+		if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
+			break;
+	};
+#endif
+
+	if (cp->magic)
+		return ((ccb_p) 0);
+
+	cp->magic = 1;
+	return (cp);
+}
+
+/*==========================================================
+**
+**
+**	Release one control block
+**
+**
+**==========================================================
+*/
+
+void ncr_free_ccb (ncb_p np, ccb_p cp, u_long target, u_long lun)
+{
+	lcb_p lp;
+
+	/*
+	**    sanity
+	*/
+
+	assert (cp != NULL);
+
+	/*
+	**	Decrement active commands and increment credit.
+	*/
+
+	lp = np->target[target].lp[lun];
+	if (lp) {
+			--lp->active;
+			++lp->opennings;
+	}
+
+	cp -> host_status = HS_IDLE;
+	cp -> magic = 0;
+#if 0
+	if (cp == np->ccb)
+		wakeup ((caddr_t) cp);
+#endif
+}
+
+/*==========================================================
+**
+**
+**      Allocation of resources for Targets/Luns/Tags.
+**
+**
+**==========================================================
+*/
+
+static	void ncr_alloc_ccb (ncb_p np, u_long target, u_long lun)
+{
+	tcb_p tp;
+	lcb_p lp;
+	ccb_p cp;
+
+	assert (np != NULL);
+
+	if (target>=MAX_TARGET) return;
+	if (lun   >=MAX_LUN   ) return;
+
+	tp=&np->target[target];
+
+	if (!tp->jump_tcb.l_cmd) {
+		/*
+		**	initialize it.
+		*/
+		tp->jump_tcb.l_cmd   =
+			cpu_to_scr((SCR_JUMP^IFFALSE (DATA (0x80 + target))));
+		tp->jump_tcb.l_paddr = np->jump_tcb.l_paddr;
+
+		tp->getscr[0] =	(np->features & FE_PFEN) ?
+			cpu_to_scr(SCR_COPY(1)):cpu_to_scr(SCR_COPY_F(1));
+		tp->getscr[1] = cpu_to_scr(vtophys (&tp->sval));
+		tp->getscr[2] =
+		cpu_to_scr(np->paddr + offsetof (struct ncr_reg, nc_sxfer));
+
+		tp->getscr[3] =	(np->features & FE_PFEN) ?
+			cpu_to_scr(SCR_COPY(1)):cpu_to_scr(SCR_COPY_F(1));
+		tp->getscr[4] = cpu_to_scr(vtophys (&tp->wval));
+		tp->getscr[5] =
+		cpu_to_scr(np->paddr + offsetof (struct ncr_reg, nc_scntl3));
+
+		assert (( (offsetof(struct ncr_reg, nc_sxfer) ^
+			offsetof(struct tcb    , sval    )) &3) == 0);
+		assert (( (offsetof(struct ncr_reg, nc_scntl3) ^
+			offsetof(struct tcb    , wval    )) &3) == 0);
+
+		tp->call_lun.l_cmd   = cpu_to_scr(SCR_CALL);
+		tp->call_lun.l_paddr =
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
+
+		tp->jump_lcb.l_cmd   = cpu_to_scr(SCR_JUMP);
+		tp->jump_lcb.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
+		np->jump_tcb.l_paddr = cpu_to_scr(vtophys (&tp->jump_tcb));
+	}
+
+	/*
+	**	Logic unit control block
+	*/
+	lp = tp->lp[lun];
+	if (!lp) {
+		/*
+		**	Allocate a lcb
+		*/
+		lp = (lcb_p) m_alloc (sizeof (struct lcb), LCB_ALIGN_SHIFT);
+		if (!lp) return;
+
+		if (DEBUG_FLAGS & DEBUG_ALLOC) {
+			PRINT_LUN(np, target, lun);
+			printf ("new lcb @%p.\n", lp);
+		}
+
+		/*
+		**	Initialize it
+		*/
+		bzero (lp, sizeof (*lp));
+		lp->jump_lcb.l_cmd   =
+			cpu_to_scr(SCR_JUMP ^ IFFALSE (DATA (lun)));
+		lp->jump_lcb.l_paddr = tp->jump_lcb.l_paddr;
+
+		lp->call_tag.l_cmd   = cpu_to_scr(SCR_CALL);
+		lp->call_tag.l_paddr =
+			cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_tag));
+
+		lp->jump_ccb.l_cmd   = cpu_to_scr(SCR_JUMP);
+		lp->jump_ccb.l_paddr =
+			cpu_to_scr(NCB_SCRIPTH_PHYS (np, aborttag));
+
+		lp->actlink = 1;
+
+		lp->active  = 1;
+
+		/*
+		**   Chain into LUN list
+		*/
+		tp->jump_lcb.l_paddr = cpu_to_scr(vtophys (&lp->jump_lcb));
+		tp->lp[lun] = lp;
+
+		ncr_setmaxtags (np, tp, driver_setup.default_tags);
+	}
+
+	/*
+	**	Allocate ccbs up to lp->reqccbs.
+	*/
+
+	/*
+	**	Limit possible number of ccbs.
+	**
+	**	If tagged command queueing is enabled,
+	**	can use more than one ccb.
+	*/
+	if (np->actccbs >= MAX_START-2) return;
+	if (lp->actccbs && (lp->actccbs >= lp->reqccbs))
+		return;
+
+	/*
+	**	Allocate a ccb
+	*/
+	cp = (ccb_p) m_alloc (sizeof (struct ccb), CCB_ALIGN_SHIFT);
+	if (!cp)
+		return;
+
+	if (DEBUG_FLAGS & DEBUG_ALLOC) {
+		PRINT_LUN(np, target, lun);
+		printf ("new ccb @%p.\n", cp);
+	}
+
+	/*
+	**	Count it
+	*/
+	lp->actccbs++;
+	np->actccbs++;
+
+	/*
+	**	Initialize it
+	*/
+	bzero (cp, sizeof (*cp));
+
+	/*
+	**	Fill in physical addresses
+	*/
+
+	cp->p_ccb	     = vtophys (cp);
+
+	/*
+	**	Chain into reselect list
+	*/
+	cp->jump_ccb.l_cmd   = cpu_to_scr(SCR_JUMP);
+	cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr;
+	lp->jump_ccb.l_paddr = cpu_to_scr(CCB_PHYS (cp, jump_ccb));
+	cp->call_tmp.l_cmd   = cpu_to_scr(SCR_CALL);
+	cp->call_tmp.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_tmp));
+
+	/*
+	**	Chain into wakeup list
+	*/
+	cp->link_ccb      = np->ccb->link_ccb;
+	np->ccb->link_ccb = cp;
+
+	/*
+	**	Chain into CCB list
+	*/
+	cp->next_ccb	= lp->next_ccb;
+	lp->next_ccb	= cp;
+}
+
+/*==========================================================
+**
+**
+**	Announce the number of ccbs/tags to the scsi driver.
+**
+**
+**==========================================================
+*/
+
+static void ncr_opennings (ncb_p np, lcb_p lp, Scsi_Cmnd * cmd)
+{
+	/*
+	**	want to reduce the number ...
+	*/
+	if (lp->actlink > lp->reqlink) {
+
+		/*
+		**	Try to  reduce the count.
+		**	We assume to run at splbio ..
+		*/
+		u_char diff = lp->actlink - lp->reqlink;
+
+		if (!diff) return;
+
+		if (diff > lp->opennings)
+			diff = lp->opennings;
+
+		lp->opennings	-= diff;
+
+		lp->actlink	-= diff;
+		if (DEBUG_FLAGS & DEBUG_TAGS)
+			printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
+				ncr_name(np), diff, lp->actlink, lp->reqlink);
+		return;
+	};
+
+	/*
+	**	want to increase the number ?
+	*/
+	if (lp->reqlink > lp->actlink) {
+		u_char diff = lp->reqlink - lp->actlink;
+
+		lp->opennings	+= diff;
+
+		lp->actlink	+= diff;
+#if 0
+		wakeup ((caddr_t) xp->sc_link);
+#endif
+		if (DEBUG_FLAGS & DEBUG_TAGS)
+			printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
+				ncr_name(np), diff, lp->actlink, lp->reqlink);
+	};
+}
+
+/*==========================================================
+**
+**
+**	Build Scatter Gather Block
+**
+**
+**==========================================================
+**
+**	The transfer area may be scattered among
+**	several non adjacent physical pages.
+**
+**	We may use MAX_SCATTER blocks.
+**
+**----------------------------------------------------------
+*/
+
+/*
+**	We try to reduce the number of interrupts caused
+**	by unexpected phase changes due to disconnects.
+**	A typical harddisk may disconnect before ANY block.
+**	If we wanted to avoid unexpected phase changes at all
+**	we had to use a break point every 512 bytes.
+**	Of course the number of scatter/gather blocks is
+**	limited.
+**	Under Linux, the scatter/gatter blocks are provided by 
+**	the generic driver. We just have to copy addresses and 
+**	sizes to the data segment array.
+*/
+
+static	int	ncr_scatter(ccb_p cp, Scsi_Cmnd *cmd)
+{
+	struct scr_tblmove *data;
+	int segment	= 0;
+	int use_sg	= (int) cmd->use_sg;
+
+#if 0
+	bzero (cp->phys.data, sizeof (cp->phys.data));
+#endif
+	data		= cp->phys.data;
+	cp->data_len	= 0;
+
+	if (!use_sg) {
+		if (cmd->request_bufflen) {
+			data = &data[MAX_SCATTER - 1];
+			data[0].addr = cpu_to_scr(vtophys(cmd->request_buffer));
+			data[0].size = cpu_to_scr(cmd->request_bufflen);
+			cp->data_len = cmd->request_bufflen;
+			segment = 1;
+		}
+	}
+	else if (use_sg <= MAX_SCATTER) {
+		struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
+
+		data = &data[MAX_SCATTER - use_sg];
+		while (segment < use_sg) {
+			data[segment].addr =
+				cpu_to_scr(vtophys(scatter[segment].address));
+			data[segment].size =
+				cpu_to_scr(scatter[segment].length);
+			cp->data_len	   += scatter[segment].length;
+			++segment;
+		}
+	}
+	else {
+		return -1;
+	}
+
+	return segment;
+}
+
+/*==========================================================
+**
+**
+**	Test the pci bus snoop logic :-(
+**
+**	Has to be called with interrupts disabled.
+**
+**
+**==========================================================
+*/
+
+#ifndef NCR_IOMAPPED
+__initfunc(
+static int ncr_regtest (struct ncb* np)
+)
+{
+	register volatile u_long data;
+	/*
+	**	ncr registers may NOT be cached.
+	**	write 0xffffffff to a read only register area,
+	**	and try to read it back.
+	*/
+	data = 0xffffffff;
+	OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
+	data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
+#if 1
+	if (data == 0xffffffff) {
+#else
+	if ((data & 0xe2f0fffd) != 0x02000080) {
+#endif
+		printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
+			(unsigned) data);
+		return (0x10);
+	};
+	return (0);
+}
+#endif
+
+__initfunc(
+static int ncr_snooptest (struct ncb* np)
+)
+{
+	u_long	ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0;
+	int	i;
+#ifndef NCR_IOMAPPED
+	if (np->reg) {
+            err |= ncr_regtest (np);
+            if (err) return (err);
+	}
+#endif
+	/*
+	**	init
+	*/
+	pc  = NCB_SCRIPTH_PHYS (np, snooptest);
+	host_wr = 1;
+	ncr_wr  = 2;
+	/*
+	**	Set memory and register.
+	*/
+	np->ncr_cache = cpu_to_scr(host_wr);
+	OUTL (nc_temp, ncr_wr);
+	/*
+	**	Start script (exchange values)
+	*/
+	OUTL (nc_dsp, pc);
+	/*
+	**	Wait 'til done (with timeout)
+	*/
+	for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
+		if (INB(nc_istat) & (INTF|SIP|DIP))
+			break;
+	/*
+	**	Save termination position.
+	*/
+	pc = INL (nc_dsp);
+	/*
+	**	Read memory and register.
+	*/
+	host_rd = scr_to_cpu(np->ncr_cache);
+	ncr_rd  = INL (nc_scratcha);
+	ncr_bk  = INL (nc_temp);
+	/*
+	**	Reset ncr chip
+	*/
+	OUTB (nc_istat,  SRST);
+	DELAY (1000);
+	OUTB (nc_istat,  0   );
+	/*
+	**	check for timeout
+	*/
+	if (i>=NCR_SNOOP_TIMEOUT) {
+		printf ("CACHE TEST FAILED: timeout.\n");
+		return (0x20);
+	};
+	/*
+	**	Check termination position.
+	*/
+	if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
+		printf ("CACHE TEST FAILED: script execution failed.\n");
+		printf ("start=%08lx, pc=%08lx, end=%08lx\n", 
+			(u_long) NCB_SCRIPTH_PHYS (np, snooptest), pc,
+			(u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
+		return (0x40);
+	};
+	/*
+	**	Show results.
+	*/
+	if (host_wr != ncr_rd) {
+		printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
+			(int) host_wr, (int) ncr_rd);
+		err |= 1;
+	};
+	if (host_rd != ncr_wr) {
+		printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
+			(int) ncr_wr, (int) host_rd);
+		err |= 2;
+	};
+	if (ncr_bk != ncr_wr) {
+		printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
+			(int) ncr_wr, (int) ncr_bk);
+		err |= 4;
+	};
+	return (err);
+}
+
+/*==========================================================
+**
+**
+**	Profiling the drivers and targets performance.
+**
+**
+**==========================================================
+*/
+
+#ifdef SCSI_NCR_PROFILE_SUPPORT
+
+/*
+**	Compute the difference in jiffies ticks.
+*/
+
+#define ncr_delta(from, to) \
+	( ((to) && (from))? (to) - (from) : -1 )
+
+#define PROFILE  cp->phys.header.stamp
+static	void ncb_profile (ncb_p np, ccb_p cp)
+{
+	int co, st, en, di, se, post,work,disc;
+	u_long diff;
+
+	PROFILE.end = jiffies;
+
+	st = ncr_delta (PROFILE.start,PROFILE.status);
+	if (st<0) return;	/* status  not reached  */
+
+	co = ncr_delta (PROFILE.start,PROFILE.command);
+	if (co<0) return;	/* command not executed */
+
+	en = ncr_delta (PROFILE.start,PROFILE.end),
+	di = ncr_delta (PROFILE.start,PROFILE.disconnect),
+	se = ncr_delta (PROFILE.start,PROFILE.select);
+	post = en - st;
+
+	/*
+	**	@PROFILE@  Disconnect time invalid if multiple disconnects
+	*/
+
+	if (di>=0) disc = se-di; else  disc = 0;
+
+	work = (st - co) - disc;
+
+	diff = (np->disc_phys - np->disc_ref) & 0xff;
+	np->disc_ref += diff;
+
+	np->profile.num_trans	+= 1;
+	if (cp->cmd) {
+		np->profile.num_kbytes	+= (cp->cmd->request_bufflen >> 10);
+		np->profile.rest_bytes	+= (cp->cmd->request_bufflen & (0x400-1));
+		if (np->profile.rest_bytes >= 0x400) {
+			++np->profile.num_kbytes;
+			np->profile.rest_bytes	-= 0x400;
+		}
+	}
+	np->profile.num_disc	+= diff;
+	np->profile.ms_setup	+= co;
+	np->profile.ms_data	+= work;
+	np->profile.ms_disc	+= disc;
+	np->profile.ms_post	+= post;
+}
+#undef PROFILE
+
+#endif /* SCSI_NCR_PROFILE_SUPPORT */
+
+/*==========================================================
+**
+**
+**	Device lookup.
+**
+**	@GENSCSI@ should be integrated to scsiconf.c
+**
+**
+**==========================================================
+*/
+
+struct table_entry {
+	char *	manufacturer;
+	char *	model;
+	char *	version;
+	u_long	info;
+};
+
+static struct table_entry device_tab[] =
+{
+#ifdef NCR_GETCC_WITHMSG
+	{"", "", "", QUIRK_NOMSG},
+	{"SONY", "SDT-5000", "3.17", QUIRK_NOMSG},
+	{"WangDAT", "Model 2600", "01.7", QUIRK_NOMSG},
+	{"WangDAT", "Model 3200", "02.2", QUIRK_NOMSG},
+	{"WangDAT", "Model 1300", "02.4", QUIRK_NOMSG},
+#endif
+	{"", "", "", 0} /* catch all: must be last entry. */
+};
+
+static u_long ncr_lookup(char * id)
+{
+	struct table_entry * p = device_tab;
+	char *d, *r, c;
+
+	for (;;p++) {
+
+		d = id+8;
+		r = p->manufacturer;
+		while ((c=*r++)) if (c!=*d++) break;
+		if (c) continue;
+
+		d = id+16;
+		r = p->model;
+		while ((c=*r++)) if (c!=*d++) break;
+		if (c) continue;
+
+		d = id+32;
+		r = p->version;
+		while ((c=*r++)) if (c!=*d++) break;
+		if (c) continue;
+
+		return (p->info);
+	}
+}
+
+/*==========================================================
+**
+**	Determine the ncr's clock frequency.
+**	This is essential for the negotiation
+**	of the synchronous transfer rate.
+**
+**==========================================================
+**
+**	Note: we have to return the correct value.
+**	THERE IS NO SAVE DEFAULT VALUE.
+**
+**	Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
+**	53C860 and 53C875 rev. 1 support fast20 transfers but 
+**	do not have a clock doubler and so are provided with a 
+**	80 MHz clock. All other fast20 boards incorporate a doubler 
+**	and so should be delivered with a 40 MHz clock.
+**	The future fast40 chips (895/895) use a 40 Mhz base clock 
+**	and provide a clock quadrupler (160 Mhz). The code below 
+**	tries to deal as cleverly as possible with all this stuff.
+**
+**----------------------------------------------------------
+*/
+
+/*
+ *	Select NCR SCSI clock frequency
+ */
+static void ncr_selectclock(ncb_p np, u_char scntl3)
+{
+	if (np->multiplier < 2) {
+		OUTB(nc_scntl3,	scntl3);
+		return;
+	}
+
+	if (bootverbose >= 2)
+		printf ("%s: enabling clock multiplier\n", ncr_name(np));
+
+	OUTB(nc_stest1, DBLEN);	   /* Enable clock multiplier		  */
+	if (np->multiplier > 2) {  /* Poll bit 5 of stest4 for quadrupler */
+		int i = 20;
+		while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
+			DELAY(20);
+		if (!i)
+			printf("%s: the chip cannot lock the frequency\n", ncr_name(np));
+	} else			/* Wait 20 micro-seconds for doubler	*/
+		DELAY(20);
+	OUTB(nc_stest3, HSC);		/* Halt the scsi clock		*/
+	OUTB(nc_scntl3,	scntl3);
+	OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier	*/
+	OUTB(nc_stest3, 0x00|TE);		/* Restart scsi clock 		*/
+}
+
+
+/*
+ *	calculate NCR SCSI clock frequency (in KHz)
+ */
+__initfunc(
+static unsigned ncrgetfreq (ncb_p np, int gen)
+)
+{
+	unsigned ms = 0;
+
+	/*
+	 * Measure GEN timer delay in order 
+	 * to calculate SCSI clock frequency
+	 *
+	 * This code will never execute too
+	 * many loop iterations (if DELAY is 
+	 * reasonably correct). It could get
+	 * too low a delay (too high a freq.)
+	 * if the CPU is slow executing the 
+	 * loop for some reason (an NMI, for
+	 * example). For this reason we will
+	 * if multiple measurements are to be 
+	 * performed trust the higher delay 
+	 * (lower frequency returned).
+	 */
+	OUTB (nc_stest1, 0);	/* make sure clock doubler is OFF */
+	OUTW (nc_sien , 0);	/* mask all scsi interrupts */
+	(void) INW (nc_sist);	/* clear pending scsi interrupt */
+	OUTB (nc_dien , 0);	/* mask all dma interrupts */
+	(void) INW (nc_sist);	/* another one, just to be sure :) */
+	OUTB (nc_scntl3, 4);	/* set pre-scaler to divide by 3 */
+	OUTB (nc_stime1, 0);	/* disable general purpose timer */
+	OUTB (nc_stime1, gen);	/* set to nominal delay of 1<<gen * 125us */
+	while (!(INW(nc_sist) & GEN) && ms++ < 100000)
+		DELAY(1000);	/* count ms */
+	OUTB (nc_stime1, 0);	/* disable general purpose timer */
+ 	/*
+ 	 * set prescaler to divide by whatever 0 means
+ 	 * 0 ought to choose divide by 2, but appears
+ 	 * to set divide by 3.5 mode in my 53c810 ...
+ 	 */
+ 	OUTB (nc_scntl3, 0);
+
+	if (bootverbose >= 2)
+		printf ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
+  	/*
+ 	 * adjust for prescaler, and convert into KHz 
+  	 */
+	return ms ? ((1 << gen) * 4340) / ms : 0;
+}
+
+/*
+ *	Get/probe NCR SCSI clock frequency
+ */
+__initfunc(
+static void ncr_getclock (ncb_p np, int mult)
+)
+{
+	unsigned char scntl3 = INB(nc_scntl3);
+	unsigned char stest1 = INB(nc_stest1);
+	unsigned f1;
+
+	np->multiplier = 1;
+	f1 = 40000;
+
+	/*
+	**	True with 875 or 895 with clock multiplier selected
+	*/
+	if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
+		if (bootverbose >= 2)
+			printf ("%s: clock multiplier found\n", ncr_name(np));
+		np->multiplier = mult;
+	}
+
+	/*
+	**	If multiplier not found or scntl3 not 7,5,3,
+	**	reset chip and get frequency from general purpose timer.
+	**	Otherwise trust scntl3 BIOS setting.
+	*/
+	if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
+		unsigned f2;
+
+		OUTB(nc_istat, SRST); DELAY(5); OUTB(nc_istat, 0);
+
+		(void) ncrgetfreq (np, 11);	/* throw away first result */
+		f1 = ncrgetfreq (np, 11);
+		f2 = ncrgetfreq (np, 11);
+
+		if (bootverbose)
+			printf ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
+
+		if (f1 > f2) f1 = f2;		/* trust lower result	*/
+
+		if	(f1 <	45000)		f1 =  40000;
+		else if (f1 <	55000)		f1 =  50000;
+		else				f1 =  80000;
+
+		if (f1 < 80000 && mult > 1) {
+			if (bootverbose >= 2)
+				printf ("%s: clock multiplier assumed\n", ncr_name(np));
+			np->multiplier	= mult;
+		}
+	} else {
+		if	((scntl3 & 7) == 3)	f1 =  40000;
+		else if	((scntl3 & 7) == 5)	f1 =  80000;
+		else 				f1 = 160000;
+
+		f1 /= np->multiplier;
+	}
+
+	/*
+	**	Compute controller synchronous parameters.
+	*/
+	f1		*= np->multiplier;
+	np->clock_khz	= f1;
+}
+
+/*===================== LINUX ENTRY POINTS SECTION ==========================*/
+
+#ifndef uchar
+#define uchar unsigned char
+#endif
+
+#ifndef ushort
+#define ushort unsigned short
+#endif
+
+#ifndef ulong
+#define ulong unsigned long
+#endif
+
+/* ---------------------------------------------------------------------
+**
+**	Driver setup from the boot command line
+**
+** ---------------------------------------------------------------------
+*/
+
+__initfunc(
+void ncr53c8xx_setup(char *str, int *ints)
+)
+{
+#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
+	char *cur = str;
+	char *pc, *pv;
+	int val;
+	int base;
+	int c;
+
+	while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
+		val = 0;
+		pv = pc;
+		c = *++pv;
+		if	(c == 'n')
+			val = 0;
+		else if	(c == 'y')
+			val = 1;
+		else {
+			base = 0;
+#if 0
+			if	(c == '0') {
+				c = *pv++;
+				base = 8;
+			}
+			if	(c == 'x') {
+				++pv;
+				base = 16;
+			}
+			else if (c >= '0' && c <= '9')
+				base = 10;
+			else
+				break;
+#endif
+			val = (int) simple_strtoul(pv, NULL, base);
+		}
+
+		if	(!strncmp(cur, "mpar:", 5))
+			driver_setup.master_parity	= val;
+		else if	(!strncmp(cur, "spar:", 5))
+			driver_setup.scsi_parity	= val;
+		else if	(!strncmp(cur, "disc:", 5))
+			driver_setup.disconnection	= val;
+		else if	(!strncmp(cur, "specf:", 6))
+			driver_setup.special_features = val;
+		else if	(!strncmp(cur, "ultra:", 6))
+			driver_setup.ultra_scsi	= val;
+		else if	(!strncmp(cur, "fsn:", 4))
+			driver_setup.force_sync_nego	= val;
+		else if	(!strncmp(cur, "revprob:", 8))
+			driver_setup.reverse_probe	= val;
+		else if	(!strncmp(cur, "tags:", 5)) {
+			if (val > SCSI_NCR_MAX_TAGS)
+				val = SCSI_NCR_MAX_TAGS;
+			driver_setup.default_tags	= val;
+			}
+		else if	(!strncmp(cur, "sync:", 5))
+			driver_setup.default_sync	= val;
+		else if	(!strncmp(cur, "verb:", 5))
+			driver_setup.verbose	= val;
+		else if	(!strncmp(cur, "debug:", 6))
+			driver_setup.debug	= val;
+		else if	(!strncmp(cur, "burst:", 6))
+			driver_setup.burst_max	= val;
+		else if	(!strncmp(cur, "led:", 4))
+			driver_setup.led_pin	= val;
+		else if	(!strncmp(cur, "wide:", 5))
+			driver_setup.max_wide	= val? 1:0;
+		else if	(!strncmp(cur, "settle:", 7))
+			driver_setup.settle_delay= val;
+		else if	(!strncmp(cur, "diff:", 5))
+			driver_setup.diff_support= val;
+		else if	(!strncmp(cur, "irqm:", 5))
+			driver_setup.irqm	= val;
+		else if	(!strncmp(cur, "pcifix:", 7))
+			driver_setup.pci_fix_up	= val;
+		else if	(!strncmp(cur, "buschk:", 7))
+			driver_setup.bus_check	= val;
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+		else if	(!strncmp(cur, "nvram:", 6))
+			driver_setup.use_nvram	= val;
+#endif
+
+		else if	(!strncmp(cur, "safe:", 5) && val)
+			memcpy(&driver_setup, &driver_safe_setup, sizeof(driver_setup));
+		else
+			printf("ncr53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
+
+#ifdef MODULE
+		if ((cur = strchr(cur, ' ')) != NULL)
+#else
+		if ((cur = strchr(cur, ',')) != NULL)
+#endif
+			++cur;
+	}
+#endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
+}
+
+static int ncr53c8xx_pci_init(Scsi_Host_Template *tpnt,
+	     uchar bus, uchar device_fn, ncr_device *device);
+
+/*
+**   Linux entry point for NCR53C8XX devices detection routine.
+**
+**   Called by the middle-level scsi drivers at initialization time,
+**   or at module installation.
+**
+**   Read the PCI configuration and try to attach each
+**   detected NCR board.
+**
+**   If NVRAM is present, try to attach boards according to 
+**   the used defined boot order.
+**
+**   Returns the number of boards successfully attached.
+*/
+
+__initfunc(
+static void ncr_print_driver_setup(void)
+)
+{
+#define YesNo(y)	y ? 'y' : 'n'
+	printk("ncr53c8xx: setup=disc:%c,specf:%d,ultra:%c,tags:%d,sync:%d,burst:%d,wide:%c,diff:%d\n",
+			YesNo(driver_setup.disconnection),
+			driver_setup.special_features,
+			YesNo(driver_setup.ultra_scsi),
+			driver_setup.default_tags,
+			driver_setup.default_sync,
+			driver_setup.burst_max,
+			YesNo(driver_setup.max_wide),
+			driver_setup.diff_support);
+	printk("ncr53c8xx: setup=mpar:%c,spar:%c,fsn=%c,verb:%d,debug:0x%x,led:%c,settle:%d,irqm:%d\n",
+			YesNo(driver_setup.master_parity),
+			YesNo(driver_setup.scsi_parity),
+			YesNo(driver_setup.force_sync_nego),
+			driver_setup.verbose,
+			driver_setup.debug,
+			YesNo(driver_setup.led_pin),
+			driver_setup.settle_delay,
+			driver_setup.irqm);
+#undef YesNo
+}
+
+/*
+**   NCR53C8XX devices description table and chip ids list.
+*/
+
+static ncr_chip	ncr_chip_table[] __initdata	= SCSI_NCR_CHIP_TABLE;
+static ushort	ncr_chip_ids[]   __initdata	= SCSI_NCR_CHIP_IDS;
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+__initfunc(
+static int
+ncr_attach_using_nvram(Scsi_Host_Template *tpnt, int nvram_index, int count, ncr_device device[])
+)
+{
+	int i, j;
+	int attach_count = 0;
+	ncr_nvram  *nvram;
+	ncr_device *devp;
+
+	if (!nvram_index)
+		return 0;
+
+	/* find first Symbios NVRAM if there is one as we need to check it for host boot order */
+	for (i = 0, nvram_index = -1; i < count; i++) {
+		devp  = &device[i];
+		nvram = devp->nvram;
+		if (!nvram)
+			continue;
+		if (nvram->type == SCSI_NCR_SYMBIOS_NVRAM) {
+			if (nvram_index == -1)
+				nvram_index = i;
+#ifdef SCSI_NCR_DEBUG_NVRAM
+			printf("ncr53c8xx: NVRAM: Symbios format Boot Block, 53c%s, PCI bus %d, device %d, function %d\n",
+				devp->chip.name, devp->slot.bus, 
+				(int) (devp->slot.device_fn & 0xf8) >> 3, 
+				(int) devp->slot.device_fn & 7);
+			for (j = 0 ; j < 4 ; j++) {
+				Symbios_host *h = &nvram->data.Symbios.host[j];
+			printf("ncr53c8xx: BOOT[%d] device_id=%04x vendor_id=%04x device_fn=%02x io_port=%04x %s\n",
+				j,		h->device_id,	h->vendor_id,
+				h->device_fn,	h->io_port,
+				(h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) ? "SCAN AT BOOT" : "");
+			}
+		}
+		else if (nvram->type == SCSI_NCR_TEKRAM_NVRAM) {
+			/* display Tekram nvram data */
+			printf("ncr53c8xx: NVRAM: Tekram format data, 53c%s, PCI bus %d, device %d, function %d\n",
+				devp->chip.name, devp->slot.bus, 
+				(int) (devp->slot.device_fn & 0xf8) >> 3, 
+				(int) devp->slot.device_fn & 7);
+#endif
+		}
+	}
+
+	if (nvram_index >= 0 && nvram_index < count)
+		nvram = device[nvram_index].nvram;
+	else
+		nvram = 0;
+
+	if (!nvram)
+		goto out;
+
+	/* 
+	** check devices in the boot record against devices detected. 
+	** attach devices if we find a match. boot table records that 
+	** do not match any detected devices will be ignored. 
+	** devices that do not match any boot table will not be attached
+	** here but will attempt to be attached during the device table 
+	** rescan.
+	*/
+     	for (i = 0; i < 4; i++) {
+		Symbios_host *h = &nvram->data.Symbios.host[i];
+		for (j = 0 ; j < count ; j++) {
+			devp = &device[j];
+			if (h->device_fn == devp->slot.device_fn &&
+#if 0	/* bus number location in nvram ? */
+			    h->bus	 == devp->slot.bus	 &&
+#endif
+			    h->device_id == devp->chip.device_id)
+				break;
+		}
+		if (j < count && !devp->attach_done) {
+			if (!ncr_attach (tpnt, attach_count, devp))
+				attach_count++;
+			devp->attach_done = 1;
+		}
+	}
+
+out:
+	return attach_count;
+}
+#endif /* SCSI_NCR_NVRAM_SUPPORT */
+
+__initfunc(
+int ncr53c8xx_detect(Scsi_Host_Template *tpnt)
+)
+{
+	int i, j;
+	int chips;
+	int count = 0;
+	uchar bus, device_fn;
+	short index;
+	int attach_count = 0;
+	ncr_device device[8];
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	ncr_nvram  nvram[4];
+	int k, nvrams;
+#endif
+	int hosts;
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	int nvram_index = 0;
+#endif
+	if (initverbose >= 2)
+		ncr_print_driver_setup();
+
+#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
+	ncr_debug = driver_setup.debug;
+#endif
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+     tpnt->proc_dir = &proc_scsi_ncr53c8xx;
+# ifdef SCSI_NCR_PROC_INFO_SUPPORT
+     tpnt->proc_info = ncr53c8xx_proc_info;
+# endif
+#endif
+
+#if	defined(SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT) && defined(MODULE)
+if (ncr53c8xx)
+	ncr53c8xx_setup(ncr53c8xx, (int *) 0);
+#endif
+
+	/* 
+	** Detect all 53c8xx hosts and then attach them.
+	**
+	** If we are using NVRAM, once all hosts are detected, we need to check
+	** any NVRAM for boot order in case detect and boot order differ and
+	** attach them using the order in the NVRAM.
+	**
+	** If no NVRAM is found or data appears invalid attach boards in the 
+	** the order they are detected.
+	*/
+
+	if (!pcibios_present())
+		return 0;
+
+	chips	= sizeof(ncr_chip_ids)	/ sizeof(ncr_chip_ids[0]);
+	hosts	= sizeof(device)	/ sizeof(device[0]);
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	k = 0;
+	if (driver_setup.use_nvram & 0x1)
+		nvrams	= sizeof(nvram)	/ sizeof(nvram[0]);
+	else
+		nvrams	= 0;
+#endif
+
+	for (j = 0; j < chips ; ++j) {
+		i = driver_setup.reverse_probe ? chips-1 - j : j;
+		for (index = 0; ; index++) {
+			char *msg = "";
+			if ((pcibios_find_device(PCI_VENDOR_ID_NCR, ncr_chip_ids[i],
+						index, &bus, &device_fn)) ||
+			    (count == hosts))
+				break;
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+			device[count].nvram = k < nvrams ? &nvram[k] : 0;
+#else
+			device[count].nvram = 0;
+#endif
+			if (ncr53c8xx_pci_init(tpnt, bus, device_fn, &device[count])) {
+				device[count].nvram = 0;
+				continue;
+			}
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+			if (device[count].nvram) {
+				++k;
+				nvram_index |= device[count].nvram->type;
+				switch (device[count].nvram->type) {
+				case SCSI_NCR_TEKRAM_NVRAM:
+					msg = "with Tekram NVRAM";
+					break;
+				case SCSI_NCR_SYMBIOS_NVRAM:
+					msg = "with Symbios NVRAM";
+					break;
+				default:
+					msg = "";
+					device[count].nvram = 0;
+					--k;
+				}
+			}
+#endif
+			printf(KERN_INFO "ncr53c8xx: 53c%s detected %s\n",
+				device[count].chip.name, msg);
+			++count;
+		}
+	}
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	attach_count = ncr_attach_using_nvram(tpnt, nvram_index, count, device);
+#endif
+	/* 
+	** rescan device list to make sure all boards attached.
+	** devices without boot records will not be attached yet
+	** so try to attach them here.
+	*/
+	for (i= 0; i < count; i++) {
+		if (!device[i].attach_done && 
+		    !ncr_attach (tpnt, attach_count, &device[i])) {
+ 			attach_count++;
+		}
+	}
+
+	return attach_count;
+}
+
+/*
+**   Read and check the PCI configuration for any detected NCR 
+**   boards and save data for attaching after all boards have 
+**   been detected.
+*/
+
+__initfunc(
+static int ncr53c8xx_pci_init(Scsi_Host_Template *tpnt,
+			      uchar bus, uchar device_fn, ncr_device *device)
+)
+{
+	ushort vendor_id, device_id, command;
+	uchar cache_line_size, latency_timer;
+	uchar irq, revision;
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
+	uint base, base_2, io_port; 
+#else
+	ulong base, base_2; 
+#endif
+	int i;
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	ncr_nvram *nvram = device->nvram;
+#endif
+	ncr_chip *chip;
+
+	printk(KERN_INFO "ncr53c8xx: at PCI bus %d, device %d, function %d\n",
+		bus, (int) (device_fn & 0xf8) >> 3, (int) device_fn & 7);
+	/*
+	 * Read info from the PCI config space.
+	 * pcibios_read_config_xxx() functions are assumed to be used for 
+	 * successfully detected PCI devices.
+	 * Expecting error conditions from them is just paranoia,
+	 * thus void cast.
+	 */
+	(void) pcibios_read_config_word(bus, device_fn,
+					PCI_VENDOR_ID, &vendor_id);
+	(void) pcibios_read_config_word(bus, device_fn,
+					PCI_DEVICE_ID, &device_id);
+	(void) pcibios_read_config_word(bus, device_fn,
+					PCI_COMMAND, &command);
+	(void) pcibios_read_config_dword(bus, device_fn,
+					PCI_BASE_ADDRESS_0, &io_port);	
+	(void) pcibios_read_config_dword(bus, device_fn,
+					PCI_BASE_ADDRESS_1, &base);
+	(void) pcibios_read_config_dword(bus, device_fn,
+					PCI_BASE_ADDRESS_2, &base_2);
+	(void) pcibios_read_config_byte(bus, device_fn,
+					PCI_CLASS_REVISION,&revision);	
+	(void) pcibios_read_config_byte(bus, device_fn,
+					PCI_INTERRUPT_LINE, &irq);
+	(void) pcibios_read_config_byte(bus, device_fn,
+					PCI_CACHE_LINE_SIZE, &cache_line_size);
+	(void) pcibios_read_config_byte(bus, device_fn,
+					PCI_LATENCY_TIMER, &latency_timer);
+
+	/*
+	 *	Check if the chip is supported
+	 */
+	chip = 0;
+	for (i = 0; i < sizeof(ncr_chip_table)/sizeof(ncr_chip_table[0]); i++) {
+		if (device_id != ncr_chip_table[i].device_id)
+			continue;
+		if (revision > ncr_chip_table[i].revision_id)
+			continue;
+		chip = &device->chip;
+		memcpy(chip, &ncr_chip_table[i], sizeof(*chip));
+		chip->revision_id = revision;
+		break;
+	}
+	if (!chip) {
+		printk("ncr53c8xx: not initializing, device not supported\n");
+		return -1;
+	}
+
+#ifdef __powerpc__
+	/*
+	 *	Severall fix-up for power/pc.
+	 *	Should not be performed by the driver.
+	 */
+	if ((command &
+		(PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY)) !=
+		(PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY)) {
+		printk("ncr53c8xx : setting PCI master/io/command bit\n");
+		command |= PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY;
+		pcibios_write_config_word(bus, device_fn, PCI_COMMAND, command);
+	}
+	if (io_port >= 0x10000000) {
+		io_port = (io_port & 0x00FFFFFF) | 0x01000000;
+		pcibios_write_config_dword(bus, device_fn, PCI_BASE_ADDRESS_0, io_port);
+	}
+	if (base >= 0x10000000) {
+		base = (base & 0x00FFFFFF) | 0x01000000;
+		pcibios_write_config_dword(bus, device_fn, PCI_BASE_ADDRESS_1, base);
+	}
+#endif
+
+	/*
+	 * Check availability of IO space, memory space and master capability.
+	 */
+	if (command & PCI_COMMAND_IO) { 
+		if ((io_port & 3) != 1) {
+			printk("ncr53c8xx: disabling I/O mapping since base address 0 (0x%x)\n"
+				"           bits 0..1 indicate a non-IO mapping\n", (int) io_port);
+			io_port = 0;
+		}
+		else
+			io_port &= PCI_BASE_ADDRESS_IO_MASK;
+	}
+	else
+		io_port = 0;
+
+	if (command & PCI_COMMAND_MEMORY) {
+		if ((base & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
+			printk("ncr53c8xx: disabling memory mapping since base address 1\n"
+				"            contains a non-memory mapping\n");
+			base = 0;
+		}
+		else 
+			base &= PCI_BASE_ADDRESS_MEM_MASK;
+	}
+	else
+		base = 0;
+	
+	if (!io_port && !base) {
+		printk("ncr53c8xx: not initializing, both I/O and memory mappings disabled\n");
+		return -1;
+	}
+
+	base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
+
+	if (io_port && check_region (io_port, 128)) {
+		printk("ncr53c8xx: IO region 0x%x to 0x%x is in use\n",
+			(int) io_port, (int) (io_port + 127));
+		return -1;
+	}
+	
+	if (!(command & PCI_COMMAND_MASTER)) {
+		printk("ncr53c8xx: not initializing, BUS MASTERING was disabled\n");
+		return -1;
+	}
+
+	/*
+	 * Fix some features according to driver setup.
+	 */
+	if (!(driver_setup.special_features & 1))
+		chip->features &= ~FE_SPECIAL_SET;
+	else {
+		if (driver_setup.special_features & 2)
+			chip->features &= ~FE_WRIE;
+	}
+	if (driver_setup.ultra_scsi < 2 && (chip->features & FE_ULTRA2)) {
+		chip->features |=  FE_ULTRA;
+		chip->features &= ~FE_ULTRA2;
+	}
+	if (driver_setup.ultra_scsi < 1)
+		chip->features &= ~FE_ULTRA;
+	if (!driver_setup.max_wide)
+		chip->features &= ~FE_WIDE;
+
+
+#ifdef	SCSI_NCR_PCI_FIX_UP_SUPPORT
+
+	/*
+	 * Try to fix up PCI config according to wished features.
+	 */
+#if defined(__i386) && !defined(MODULE)
+	if ((driver_setup.pci_fix_up & 1) &&
+	    (chip->features & FE_CLSE) && cache_line_size == 0) {
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,75)
+		extern char x86;
+		switch(x86) {
+#else
+		switch(boot_cpu_data.x86) {
+#endif
+		case 4:	cache_line_size = 4; break;
+		case 5:	cache_line_size = 8; break;
+		}
+		if (cache_line_size)
+			(void) pcibios_write_config_byte(bus, device_fn,
+					PCI_CACHE_LINE_SIZE, cache_line_size);
+		if (initverbose)
+			printk("ncr53c8xx: setting PCI_CACHE_LINE_SIZE to %d (fix-up).\n", cache_line_size);
+	}
+
+	if ((driver_setup.pci_fix_up & 2) && cache_line_size &&
+	    (chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
+		command |= PCI_COMMAND_INVALIDATE;
+		(void) pcibios_write_config_word(bus, device_fn,
+						PCI_COMMAND, command);
+		if (initverbose)
+			printk("ncr53c8xx: setting PCI_COMMAND_INVALIDATE bit (fix-up).\n");
+	}
+#endif
+	/*
+	 * Fix up for old chips that support READ LINE but not CACHE LINE SIZE.
+	 * - If CACHE LINE SIZE is unknown, set burst max to 32 bytes = 8 dwords
+	 *   and donnot enable READ LINE.
+	 * - Otherwise set it to the CACHE LINE SIZE (power of 2 assumed). 
+	 */
+
+	if (!(chip->features & FE_CLSE)) {
+		int burst_max = chip->burst_max;
+		if (cache_line_size == 0) {
+			chip->features	&= ~FE_ERL;
+			if (burst_max > 3)
+				burst_max = 3;
+		}
+		else {
+			while (cache_line_size < (1 << burst_max))
+				--burst_max;
+		}
+		chip->burst_max = burst_max;
+	}
+
+	/*
+	 * Tune PCI LATENCY TIMER according to burst max length transfer.
+	 * (latency timer >= burst length + 6, we add 10 to be quite sure)
+	 * If current value is zero, the device has probably been configured 
+	 * for no bursting due to some broken hardware.
+	 */
+
+	if (latency_timer == 0 && chip->burst_max)
+		printk("ncr53c8xx: PCI_LATENCY_TIMER=0, bursting should'nt be allowed.\n");
+
+	if ((driver_setup.pci_fix_up & 4) && chip->burst_max) {
+		uchar lt = (1 << chip->burst_max) + 6 + 10;
+		if (latency_timer < lt) {
+			latency_timer = lt;
+			if (initverbose)
+				printk("ncr53c8xx: setting PCI_LATENCY_TIMER to %d bus clocks (fix-up).\n", latency_timer);
+			 (void) pcibios_write_config_byte(bus, device_fn,
+					PCI_LATENCY_TIMER, latency_timer);
+		}
+	}
+
+	/*
+	 * Fix up for recent chips that support CACHE LINE SIZE.
+	 * If PCI config space is not OK, remove features that shall not be 
+	 * used by the chip. No need to trigger possible chip bugs.
+	 */
+
+	if ((chip->features & FE_CLSE) && cache_line_size == 0) {
+		chip->features &= ~FE_CACHE_SET;
+		printk("ncr53c8xx: PCI_CACHE_LINE_SIZE not set, features based on CACHE LINE SIZE not used.\n");
+	}
+
+	if ((chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
+		chip->features &= ~FE_WRIE;
+		printk("ncr53c8xx: PCI_COMMAND_INVALIDATE not set, WRITE AND INVALIDATE not used\n");
+	}
+
+#endif	/* SCSI_NCR_PCI_FIX_UP_SUPPORT */
+
+ 	/* initialise ncr_device structure with items required by ncr_attach */
+	device->slot.bus	= bus;
+	device->slot.device_fn	= device_fn;
+	device->slot.base	= base;
+	device->slot.base_2	= base_2;
+	device->slot.io_port	= io_port;
+	device->slot.irq	= irq;
+	device->attach_done	= 0;
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+	if (!nvram)
+		goto out;
+
+	/*
+	** Get access to chip IO registers
+	*/
+#ifdef NCR_IOMAPPED
+	request_region(io_port, 128, "ncr53c8xx");
+	device->slot.port = io_port;
+#else
+	device->slot.reg = (struct ncr_reg *) remap_pci_mem((ulong) base, 128);
+	if (!device->slot.reg)
+		goto out;
+#endif
+
+	/*
+	** Try to read SYMBIOS nvram.
+	** Data can be used to order booting of boards.
+	**
+	** Data is saved in ncr_device structure if NVRAM found. This
+	** is then used to find drive boot order for ncr_attach().
+	**
+	** NVRAM data is passed to Scsi_Host_Template later during ncr_attach()
+	** for any device set up.
+	**
+	** Try to read TEKRAM nvram if Symbios nvram not found.
+	*/
+
+	if	(!ncr_get_Symbios_nvram(&device->slot, &nvram->data.Symbios))
+		nvram->type = SCSI_NCR_SYMBIOS_NVRAM;
+	else if	(!ncr_get_Tekram_nvram(&device->slot, &nvram->data.Tekram))
+		nvram->type = SCSI_NCR_TEKRAM_NVRAM;
+	else
+		nvram->type = 0;
+out:
+	/*
+	** Release access to chip IO registers
+	*/
+#ifdef NCR_IOMAPPED
+	release_region(device->slot.port, 128);
+#else
+	unmap_pci_mem((vm_offset_t) device->slot.reg, (u_long) 128);
+#endif
+
+#endif	/* SCSI_NCR_NVRAM_SUPPORT */
+	return 0;     
+}
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
+/*
+**   Linux select queue depths function
+*/
+static void ncr53c8xx_select_queue_depths(struct Scsi_Host *host, struct scsi_device *devlist)
+{
+	struct scsi_device *device;
+
+	for (device = devlist; device; device = device->next) {
+		if (device->host == host) {
+#if SCSI_NCR_MAX_TAGS > 1
+			if (device->tagged_supported) {
+				device->queue_depth = SCSI_NCR_MAX_TAGS;
+			}
+			else {
+				device->queue_depth = 2;
+			}
+#else
+			device->queue_depth = 1;
+#endif
+
+#ifdef DEBUG_NCR53C8XX
+printk("ncr53c8xx_select_queue_depth: id=%d, lun=%d, queue_depth=%d\n",
+	device->id, device->lun, device->queue_depth);
+#endif
+		}
+	}
+}
+#endif
+
+/*
+**   Linux entry point of queuecommand() function
+*/
+
+int ncr53c8xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
+{
+     int sts;
+#ifdef DEBUG_NCR53C8XX
+printk("ncr53c8xx_queue_command\n");
+#endif
+
+     if ((sts = ncr_queue_command(cmd, done)) != DID_OK) {
+	  cmd->result = ScsiResult(sts, 0);
+	  done(cmd);
+#ifdef DEBUG_NCR53C8XX
+printk("ncr53c8xx : command not queued - result=%d\n", sts);
+#endif
+          return sts;
+     }
+#ifdef DEBUG_NCR53C8XX
+printk("ncr53c8xx : command successfully queued\n");
+#endif
+     return sts;
+}
+
+/*
+**   Linux entry point of the interrupt handler.
+**   Fort linux versions > 1.3.70, we trust the kernel for 
+**   passing the internal host descriptor as 'dev_id'.
+**   Otherwise, we scan the host list and call the interrupt 
+**   routine for each host that uses this IRQ.
+*/
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
+static void ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
+{
+#ifdef DEBUG_NCR53C8XX
+     printk("ncr53c8xx : interrupt received\n");
+#endif
+
+     if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
+     ncr_exception((ncb_p) dev_id);
+     if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
+}
+
+#else
+static void ncr53c8xx_intr(int irq, struct pt_regs * regs)
+{
+     struct Scsi_Host *host;
+     struct host_data *host_data;
+
+     for (host = first_host; host; host = host->next) {
+	  if (host->hostt == the_template && host->irq == irq) {
+	       host_data = (struct host_data *) host->hostdata;
+               if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
+               ncr_exception(host_data->ncb);
+               if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
+	  }
+     }
+}
+#endif
+
+/*
+**   Linux entry point of the timer handler
+*/
+
+static void ncr53c8xx_timeout(unsigned long np)
+{
+     ncr_timeout((ncb_p) np);
+}
+
+/*
+**   Linux entry point of reset() function
+*/
+
+#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
+
+int ncr53c8xx_reset(Scsi_Cmnd *cmd, unsigned int reset_flags)
+{
+	int sts;
+	unsigned long flags;
+
+	printk("ncr53c8xx_reset: pid=%lu reset_flags=%x serial_number=%ld serial_number_at_timeout=%ld\n",
+		cmd->pid, reset_flags, cmd->serial_number, cmd->serial_number_at_timeout);
+
+	save_flags(flags); cli();
+
+	/*
+	 * We have to just ignore reset requests in some situations.
+	 */
+#if defined SCSI_RESET_NOT_RUNNING
+	if (cmd->serial_number != cmd->serial_number_at_timeout) {
+		sts = SCSI_RESET_NOT_RUNNING;
+		goto out;
+	}
+#endif
+	/*
+	 * If the mid-level driver told us reset is synchronous, it seems 
+	 * that we must call the done() callback for the involved command, 
+	 * even if this command was not queued to the low-level driver, 
+	 * before returning SCSI_RESET_SUCCESS.
+	 */
+
+	sts = ncr_reset_bus(cmd,
+	(reset_flags & (SCSI_RESET_SYNCHRONOUS | SCSI_RESET_ASYNCHRONOUS)) == SCSI_RESET_SYNCHRONOUS);
+	/*
+	 * Since we always reset the controller, when we return success, 
+	 * we add this information to the return code.
+	 */
+#if defined SCSI_RESET_HOST_RESET
+	if (sts == SCSI_RESET_SUCCESS)
+		sts |= SCSI_RESET_HOST_RESET;
+#endif
+
+out:
+	restore_flags(flags);
+	return sts;
+}
+#else
+int ncr53c8xx_reset(Scsi_Cmnd *cmd)
+{
+	printk("ncr53c8xx_reset: command pid %lu\n", cmd->pid);
+	return ncr_reset_bus(cmd, 1);
+}
+#endif
+
+/*
+**   Linux entry point of abort() function
+*/
+
+#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
+
+int ncr53c8xx_abort(Scsi_Cmnd *cmd)
+{
+	int sts;
+	unsigned long flags;
+
+	printk("ncr53c8xx_abort: pid=%lu serial_number=%ld serial_number_at_timeout=%ld\n",
+		cmd->pid, cmd->serial_number, cmd->serial_number_at_timeout);
+
+	save_flags(flags); cli();
+
+	/*
+	 * We have to just ignore abort requests in some situations.
+	 */
+	if (cmd->serial_number != cmd->serial_number_at_timeout) {
+		sts = SCSI_ABORT_NOT_RUNNING;
+		goto out;
+	}
+
+	sts = ncr_abort_command(cmd);
+out:
+	restore_flags(flags);
+	return sts;
+}
+#else
+int ncr53c8xx_abort(Scsi_Cmnd *cmd)
+{
+	printk("ncr53c8xx_abort: command pid %lu\n", cmd->pid);
+	return ncr_abort_command(cmd);
+}
+#endif
+
+#ifdef MODULE
+int ncr53c8xx_release(struct Scsi_Host *host)
+{
+#ifdef DEBUG_NCR53C8XX
+printk("ncr53c8xx : release\n");
+#endif
+     ncr_detach(((struct host_data *) host->hostdata)->ncb);
+
+     return 1;
+}
+#endif
+
+
+/*
+**	Scsi command waiting list management.
+**
+**	It may happen that we cannot insert a scsi command into the start queue,
+**	in the following circumstances.
+** 		Too few preallocated ccb(s), 
+**		maxtags < cmd_per_lun of the Linux host control block,
+**		etc...
+**	Such scsi commands are inserted into a waiting list.
+**	When a scsi command complete, we try to requeue the commands of the
+**	waiting list.
+*/
+
+#define next_wcmd host_scribble
+
+static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd)
+{
+	Scsi_Cmnd *wcmd;
+
+#ifdef DEBUG_WAITING_LIST
+	printf("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
+#endif
+	cmd->next_wcmd = 0;
+	if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
+	else {
+		while ((wcmd->next_wcmd) != 0)
+			wcmd = (Scsi_Cmnd *) wcmd->next_wcmd;
+		wcmd->next_wcmd = (char *) cmd;
+	}
+}
+
+static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd)
+{
+	Scsi_Cmnd *wcmd;
+
+	if (!(wcmd = np->waiting_list)) return 0;
+	while (wcmd->next_wcmd) {
+		if (cmd == (Scsi_Cmnd *) wcmd->next_wcmd) {
+			if (to_remove) {
+				wcmd->next_wcmd = cmd->next_wcmd;
+				cmd->next_wcmd = 0;
+			}
+#ifdef DEBUG_WAITING_LIST
+	printf("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
+#endif
+			return cmd;
+		}
+	}
+	return 0;
+}
+
+static void process_waiting_list(ncb_p np, int sts)
+{
+	Scsi_Cmnd *waiting_list, *wcmd;
+
+	waiting_list = np->waiting_list;
+	np->waiting_list = 0;
+
+#ifdef DEBUG_WAITING_LIST
+	if (waiting_list) printf("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
+#endif
+	while ((wcmd = waiting_list) != 0) {
+		waiting_list = (Scsi_Cmnd *) wcmd->next_wcmd;
+		wcmd->next_wcmd = 0;
+		if (sts == DID_OK) {
+#ifdef DEBUG_WAITING_LIST
+	printf("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
+#endif
+			sts = ncr_queue_command(wcmd, wcmd->scsi_done);
+		}
+		if (sts != DID_OK) {
+#ifdef DEBUG_WAITING_LIST
+	printf("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
+#endif
+			wcmd->result = ScsiResult(sts, 0);
+			wcmd->scsi_done(wcmd);
+		}
+	}
+}
+
+#undef next_wcmd
+
+/*
+**	Returns data transfer direction for common op-codes.
+*/
+
+static int guess_xfer_direction(int opcode)
+{
+	int d;
+
+	switch(opcode) {
+	case 0x12:  /*	INQUIRY				12 */
+	case 0x4D:  /*	LOG SENSE			4D */
+	case 0x5A:  /*	MODE SENSE(10)			5A */
+	case 0x1A:  /*	MODE SENSE(6)			1A */
+	case 0x3C:  /*	READ BUFFER			3C */
+	case 0x1C:  /*	RECEIVE DIAGNOSTIC RESULTS	1C */
+	case 0x03:  /*	REQUEST SENSE			03 */
+		d = XferIn;
+		break;
+	case 0x39:  /*	COMPARE				39 */
+	case 0x3A:  /*	COPY AND VERIFY			3A */
+	case 0x18:  /*	COPY				18 */
+	case 0x4C:  /*	LOG SELECT			4C */
+	case 0x55:  /*	MODE SELECT(10)			55 */
+	case 0x3B:  /*	WRITE BUFFER			3B */
+	case 0x1D:  /*	SEND DIAGNOSTIC			1D */
+	case 0x40:  /*	CHANGE DEFINITION		40 */
+	case 0x15:  /*	MODE SELECT(6)			15 */
+		d = XferOut;
+		break;
+	case 0x00:  /*	TEST UNIT READY			00 */
+		d = XferNone;
+		break;
+	default:
+		d = XferBoth;
+		break;
+	}
+
+	return d;
+}
+
+
+#ifdef SCSI_NCR_PROC_INFO_SUPPORT
+
+/*=========================================================================
+**	Proc file system stuff
+**
+**	A read operation returns profile information.
+**	A write operation is a control command.
+**	The string is parsed in the driver code and the command is passed 
+**	to the ncr_usercmd() function.
+**=========================================================================
+*/
+
+#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
+
+#define is_digit(c)	((c) >= '0' && (c) <= '9')
+#define digit_to_bin(c)	((c) - '0')
+#define is_space(c)	((c) == ' ' || (c) == '\t')
+
+static int skip_spaces(char *ptr, int len)
+{
+	int cnt, c;
+
+	for (cnt = len; cnt > 0 && (c = *ptr++) && is_space(c); cnt--);
+
+	return (len - cnt);
+}
+
+static int get_int_arg(char *ptr, int len, u_long *pv)
+{
+	int	cnt, c;
+	u_long	v;
+
+	for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && is_digit(c); cnt--) {
+		v = (v * 10) + digit_to_bin(c);
+	}
+
+	if (pv)
+		*pv = v;
+
+	return (len - cnt);
+}
+
+static int is_keyword(char *ptr, int len, char *verb)
+{
+	int verb_len = strlen(verb);
+
+	if (len >= strlen(verb) && !memcmp(verb, ptr, verb_len))
+		return verb_len;
+	else
+		return 0;
+
+}
+
+#define SKIP_SPACES(min_spaces)						\
+	if ((arg_len = skip_spaces(ptr, len)) < (min_spaces))		\
+		return -EINVAL;						\
+	ptr += arg_len; len -= arg_len;
+
+#define GET_INT_ARG(v)							\
+	if (!(arg_len = get_int_arg(ptr, len, &(v))))			\
+		return -EINVAL;						\
+	ptr += arg_len; len -= arg_len;
+
+
+/*
+**	Parse a control command
+*/
+
+static int ncr_user_command(ncb_p np, char *buffer, int length)
+{
+	char *ptr	= buffer;
+	int len		= length;
+	struct usrcmd	 *uc = &np->user;
+	int		arg_len;
+	u_long 		target;
+
+	bzero(uc, sizeof(*uc));
+
+	if (len > 0 && ptr[len-1] == '\n')
+		--len;
+
+	if	((arg_len = is_keyword(ptr, len, "setsync")) != 0)
+		uc->cmd = UC_SETSYNC;
+	else if	((arg_len = is_keyword(ptr, len, "settags")) != 0)
+		uc->cmd = UC_SETTAGS;
+	else if	((arg_len = is_keyword(ptr, len, "setorder")) != 0)
+		uc->cmd = UC_SETORDER;
+	else if	((arg_len = is_keyword(ptr, len, "setwide")) != 0)
+		uc->cmd = UC_SETWIDE;
+	else if	((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
+		uc->cmd = UC_SETDEBUG;
+	else if	((arg_len = is_keyword(ptr, len, "setflag")) != 0)
+		uc->cmd = UC_SETFLAG;
+	else if	((arg_len = is_keyword(ptr, len, "clearprof")) != 0)
+		uc->cmd = UC_CLEARPROF;
+#ifdef	UC_DEBUG_ERROR_RECOVERY
+	else if	((arg_len = is_keyword(ptr, len, "debug_error_recovery")) != 0)
+		uc->cmd = UC_DEBUG_ERROR_RECOVERY;
+#endif
+	else
+		arg_len = 0;
+
+#ifdef DEBUG_PROC_INFO
+printf("ncr_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
+#endif
+
+	if (!arg_len)
+		return -EINVAL;
+	ptr += arg_len; len -= arg_len;
+
+	switch(uc->cmd) {
+	case UC_SETSYNC:
+	case UC_SETTAGS:
+	case UC_SETWIDE:
+	case UC_SETFLAG:
+		SKIP_SPACES(1);
+		if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
+			ptr += arg_len; len -= arg_len;
+			uc->target = ~0;
+		} else {
+			GET_INT_ARG(target);
+			uc->target = (1<<target);
+#ifdef DEBUG_PROC_INFO
+printf("ncr_user_command: target=%ld\n", target);
+#endif
+		}
+		break;
+	}
+
+	switch(uc->cmd) {
+	case UC_SETSYNC:
+	case UC_SETTAGS:
+	case UC_SETWIDE:
+		SKIP_SPACES(1);
+		GET_INT_ARG(uc->data);
+#ifdef DEBUG_PROC_INFO
+printf("ncr_user_command: data=%ld\n", uc->data);
+#endif
+		break;
+	case UC_SETORDER:
+		SKIP_SPACES(1);
+		if	((arg_len = is_keyword(ptr, len, "simple")))
+			uc->data = M_SIMPLE_TAG;
+		else if	((arg_len = is_keyword(ptr, len, "ordered")))
+			uc->data = M_ORDERED_TAG;
+		else if	((arg_len = is_keyword(ptr, len, "default")))
+			uc->data = 0;
+		else
+			return -EINVAL;
+		break;
+	case UC_SETDEBUG:
+		while (len > 0) {
+			SKIP_SPACES(1);
+			if	((arg_len = is_keyword(ptr, len, "alloc")))
+				uc->data |= DEBUG_ALLOC;
+			else if	((arg_len = is_keyword(ptr, len, "phase")))
+				uc->data |= DEBUG_PHASE;
+			else if	((arg_len = is_keyword(ptr, len, "poll")))
+				uc->data |= DEBUG_POLL;
+			else if	((arg_len = is_keyword(ptr, len, "queue")))
+				uc->data |= DEBUG_QUEUE;
+			else if	((arg_len = is_keyword(ptr, len, "result")))
+				uc->data |= DEBUG_RESULT;
+			else if	((arg_len = is_keyword(ptr, len, "scatter")))
+				uc->data |= DEBUG_SCATTER;
+			else if	((arg_len = is_keyword(ptr, len, "script")))
+				uc->data |= DEBUG_SCRIPT;
+			else if	((arg_len = is_keyword(ptr, len, "tiny")))
+				uc->data |= DEBUG_TINY;
+			else if	((arg_len = is_keyword(ptr, len, "timing")))
+				uc->data |= DEBUG_TIMING;
+			else if	((arg_len = is_keyword(ptr, len, "nego")))
+				uc->data |= DEBUG_NEGO;
+			else if	((arg_len = is_keyword(ptr, len, "tags")))
+				uc->data |= DEBUG_TAGS;
+			else if	((arg_len = is_keyword(ptr, len, "freeze")))
+				uc->data |= DEBUG_FREEZE;
+			else if	((arg_len = is_keyword(ptr, len, "restart")))
+				uc->data |= DEBUG_RESTART;
+			else
+				return -EINVAL;
+			ptr += arg_len; len -= arg_len;
+		}
+#ifdef DEBUG_PROC_INFO
+printf("ncr_user_command: data=%ld\n", uc->data);
+#endif
+		break;
+	case UC_SETFLAG:
+		while (len > 0) {
+			SKIP_SPACES(1);
+			if	((arg_len = is_keyword(ptr, len, "trace")))
+				uc->data |= UF_TRACE;
+			else if	((arg_len = is_keyword(ptr, len, "no_disc")))
+				uc->data |= UF_NODISC;
+			else
+				return -EINVAL;
+			ptr += arg_len; len -= arg_len;
+		}
+		break;
+#ifdef	UC_DEBUG_ERROR_RECOVERY
+	case UC_DEBUG_ERROR_RECOVERY:
+		SKIP_SPACES(1);
+		if	((arg_len = is_keyword(ptr, len, "sge")))
+			uc->data = 1;
+		else if	((arg_len = is_keyword(ptr, len, "abort")))
+			uc->data = 2;
+		else if	((arg_len = is_keyword(ptr, len, "reset")))
+			uc->data = 3;
+		else if	((arg_len = is_keyword(ptr, len, "parity")))
+			uc->data = 4;
+		else if	((arg_len = is_keyword(ptr, len, "none")))
+			uc->data = 0;
+		else
+			return -EINVAL;
+		ptr += arg_len; len -= arg_len;
+		break;
+#endif
+	default:
+		break;
+	}
+
+	if (len)
+		return -EINVAL;
+	else {
+		long flags;
+
+		save_flags(flags); cli();
+		ncr_usercmd (np);
+		restore_flags(flags);
+	}
+	return length;
+}
+
+#endif	/* SCSI_NCR_USER_COMMAND_SUPPORT */
+
+#ifdef SCSI_NCR_USER_INFO_SUPPORT
+
+struct info_str
+{
+	char *buffer;
+	int length;
+	int offset;
+	int pos;
+};
+
+static void copy_mem_info(struct info_str *info, char *data, int len)
+{
+	if (info->pos + len > info->length)
+		len = info->length - info->pos;
+
+	if (info->pos + len < info->offset) {
+		info->pos += len;
+		return;
+	}
+	if (info->pos < info->offset) {
+		data += (info->offset - info->pos);
+		len  -= (info->offset - info->pos);
+	}
+
+	if (len > 0) {
+		memcpy(info->buffer + info->pos, data, len);
+		info->pos += len;
+	}
+}
+
+static int copy_info(struct info_str *info, char *fmt, ...)
+{
+	va_list args;
+	char buf[81];
+	int len;
+
+	va_start(args, fmt);
+	len = vsprintf(buf, fmt, args);
+	va_end(args);
+
+	copy_mem_info(info, buf, len);
+	return len;
+}
+
+/*
+**	Copy formatted profile information into the input buffer.
+*/
+
+#define to_ms(t) ((t) * 1000 / HZ)
+
+static int ncr_host_info(ncb_p np, char *ptr, off_t offset, int len)
+{
+	struct info_str info;
+
+	info.buffer	= ptr;
+	info.length	= len;
+	info.offset	= offset;
+	info.pos	= 0;
+
+	copy_info(&info, "General information:\n");
+	copy_info(&info, "  Chip NCR53C%s, ",	np->chip_name);
+	copy_info(&info, "device id 0x%x, ",	np->device_id);
+	copy_info(&info, "revision id 0x%x\n",	np->revision_id);
+
+	copy_info(&info, "  IO port address 0x%lx, ", (u_long) np->port);
+	copy_info(&info, "IRQ number %d\n", (int) np->irq);
+
+#ifndef NCR_IOMAPPED
+	if (np->reg)
+		copy_info(&info, "  Using memory mapped IO at virtual address 0x%lx\n",
+		                  (u_long) np->reg);
+#endif
+	copy_info(&info, "  Synchronous period factor %d, ", (int) np->minsync);
+	copy_info(&info, "max commands per lun %d\n", SCSI_NCR_MAX_TAGS);
+
+	if (driver_setup.debug || driver_setup.verbose > 1) {
+		copy_info(&info, "  Debug flags 0x%x, ", driver_setup.debug);
+		copy_info(&info, "verbosity level %d\n", driver_setup.verbose);
+	}
+
+#ifdef SCSI_NCR_PROFILE_SUPPORT
+	copy_info(&info, "Profiling information:\n");
+	copy_info(&info, "  %-12s = %lu\n", "num_trans",np->profile.num_trans);
+	copy_info(&info, "  %-12s = %lu\n", "num_kbytes",np->profile.num_kbytes);
+	copy_info(&info, "  %-12s = %lu\n", "num_disc",	np->profile.num_disc);
+	copy_info(&info, "  %-12s = %lu\n", "num_break",np->profile.num_break);
+	copy_info(&info, "  %-12s = %lu\n", "num_int",	np->profile.num_int);
+	copy_info(&info, "  %-12s = %lu\n", "num_fly",	np->profile.num_fly);
+	copy_info(&info, "  %-12s = %lu\n", "ms_setup",	to_ms(np->profile.ms_setup));
+	copy_info(&info, "  %-12s = %lu\n", "ms_data",	to_ms(np->profile.ms_data));
+	copy_info(&info, "  %-12s = %lu\n", "ms_disc",	to_ms(np->profile.ms_disc));
+	copy_info(&info, "  %-12s = %lu\n", "ms_post",	to_ms(np->profile.ms_post));
+#endif
+	
+	return info.pos > info.offset? info.pos - info.offset : 0;
+}
+
+#endif /* SCSI_NCR_USER_INFO_SUPPORT */
+
+/*
+**	Entry point of the scsi proc fs of the driver.
+**	- func = 0 means read  (returns profile data)
+**	- func = 1 means write (parse user control command)
+*/
+
+int ncr53c8xx_proc_info(char *buffer, char **start, off_t offset,
+			int length, int hostno, int func)
+{
+	struct Scsi_Host *host;
+	struct host_data *host_data;
+	ncb_p ncb = 0;
+	int retv;
+
+#ifdef DEBUG_PROC_INFO
+printf("ncr53c8xx_proc_info: hostno=%d, func=%d\n", hostno, func);
+#endif
+
+	for (host = first_host; host; host = host->next) {
+		if (host->hostt == the_template && host->host_no == hostno) {
+			host_data = (struct host_data *) host->hostdata;
+			ncb = host_data->ncb;
+			break;
+		}
+	}
+
+	if (!ncb)
+		return -EINVAL;
+
+	if (func) {
+#ifdef	SCSI_NCR_USER_COMMAND_SUPPORT
+		retv = ncr_user_command(ncb, buffer, length);
+#else
+		retv = -EINVAL;
+#endif
+	}
+	else {
+		if (start)
+			*start = buffer;
+#ifdef SCSI_NCR_USER_INFO_SUPPORT
+		retv = ncr_host_info(ncb, buffer, offset, length);
+#else
+		retv = -EINVAL;
+#endif
+	}
+
+	return retv;
+}
+
+
+/*=========================================================================
+**	End of proc file system stuff
+**=========================================================================
+*/
+#endif
+
+
+#ifdef SCSI_NCR_NVRAM_SUPPORT
+
+/* ---------------------------------------------------------------------
+**
+**	Try reading Symbios format nvram
+**
+** ---------------------------------------------------------------------
+**
+** GPOI0 - data in/data out
+** GPIO1 - clock
+**
+**	return 0 if NVRAM data OK, 1 if NVRAM data not OK
+** ---------------------------------------------------------------------
+*/
+
+#define SET_BIT 0
+#define CLR_BIT 1
+#define SET_CLK 2
+#define CLR_CLK 3
+
+static u_short nvram_read_data(ncr_slot *np, u_char *data, int len, u_char *gpreg, u_char *gpcntl);
+static void nvram_start(ncr_slot *np, u_char *gpreg);
+static void nvram_write_byte(ncr_slot *np, u_char *ack_data, u_char write_data, u_char *gpreg, u_char *gpcntl);
+static void nvram_read_byte(ncr_slot *np, u_char *read_data, u_char ack_data, u_char *gpreg, u_char *gpcntl);
+static void nvram_readAck(ncr_slot *np, u_char *read_bit, u_char *gpreg, u_char *gpcntl);
+static void nvram_writeAck(ncr_slot *np, u_char write_bit, u_char *gpreg, u_char *gpcntl);
+static void nvram_doBit(ncr_slot *np, u_char *read_bit, u_char write_bit, u_char *gpreg);
+static void nvram_stop(ncr_slot *np, u_char *gpreg);
+static void nvram_setBit(ncr_slot *np, u_char write_bit, u_char *gpreg, int bit_mode);
+
+__initfunc(
+static int ncr_get_Symbios_nvram (ncr_slot *np, Symbios_nvram *nvram)
+)
+{
+	static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0};
+	u_char	gpcntl, gpreg;
+	u_char	old_gpcntl, old_gpreg;
+	u_short	csum;
+	u_char	ack_data;
+	int	retv = 1;
+
+	/* save current state of GPCNTL and GPREG */
+	old_gpreg	= INB (nc_gpreg);
+	old_gpcntl	= INB (nc_gpcntl);
+	gpcntl		= old_gpcntl & 0xfc;
+
+	/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
+	OUTB (nc_gpreg,  old_gpreg);
+	OUTB (nc_gpcntl, gpcntl);
+
+	/* this is to set NVRAM into a known state with GPIO0/1 both low */
+	gpreg = old_gpreg;
+	nvram_setBit(np, 0, &gpreg, CLR_CLK);
+	nvram_setBit(np, 0, &gpreg, CLR_BIT);
+		
+	/* now set NVRAM inactive with GPIO0/1 both high */
+	nvram_stop(np, &gpreg);
+	
+	/* activate NVRAM */
+	nvram_start(np, &gpreg);
+
+	/* write device code and random address MSB */
+	nvram_write_byte(np, &ack_data,
+		0xa0 | ((SYMBIOS_NVRAM_ADDRESS >> 7) & 0x0e), &gpreg, &gpcntl);
+	if (ack_data & 0x01)
+		goto out;
+
+	/* write random address LSB */
+	nvram_write_byte(np, &ack_data,
+		(SYMBIOS_NVRAM_ADDRESS & 0x7f) << 1, &gpreg, &gpcntl);
+	if (ack_data & 0x01)
+		goto out;
+
+	/* regenerate START state to set up for reading */
+	nvram_start(np, &gpreg);
+	
+	/* rewrite device code and address MSB with read bit set (lsb = 0x01) */
+	nvram_write_byte(np, &ack_data,
+		0xa1 | ((SYMBIOS_NVRAM_ADDRESS >> 7) & 0x0e), &gpreg, &gpcntl);
+	if (ack_data & 0x01)
+		goto out;
+
+	/* now set up GPIO0 for inputting data */
+	gpcntl |= 0x01;
+	OUTB (nc_gpcntl, gpcntl);
+		
+	/* input all active data - only part of total NVRAM */
+	csum = nvram_read_data(np,
+			(u_char *) nvram, sizeof(*nvram), &gpreg, &gpcntl);
+
+	/* finally put NVRAM back in inactive mode */
+	gpcntl &= 0xfe;
+	OUTB (nc_gpcntl, gpcntl);
+	nvram_stop(np, &gpreg);
+	
+#ifdef SCSI_NCR_DEBUG_NVRAM
+printf("ncr53c8xx: NvRAM marker=%x trailer=%x %x %x %x %x %x byte_count=%d/%d checksum=%x/%x\n",
+	nvram->start_marker,
+	nvram->trailer[0], nvram->trailer[1], nvram->trailer[2],
+	nvram->trailer[3], nvram->trailer[4], nvram->trailer[5],
+	nvram->byte_count, sizeof(*nvram) - 12,
+	nvram->checksum, csum);
+#endif
+
+	/* check valid NVRAM signature, verify byte count and checksum */
+	if (nvram->start_marker == 0 &&
+	    !memcmp(nvram->trailer, Symbios_trailer, 6) &&
+	    nvram->byte_count == sizeof(*nvram) - 12 &&
+	    csum == nvram->checksum)
+		retv = 0;
+out:
+	/* return GPIO0/1 to original states after having accessed NVRAM */
+	OUTB (nc_gpcntl, old_gpcntl);
+	OUTB (nc_gpreg,  old_gpreg);
+
+	return retv;
+}
+
+/*
+ * Read Symbios NvRAM data and compute checksum.
+ */
+__initfunc(
+static u_short nvram_read_data(ncr_slot *np, u_char *data, int len, u_char *gpreg, u_char *gpcntl)
+)
+{
+	int	x;
+	u_short	csum;
+
+	for (x = 0; x < len; x++) 
+		nvram_read_byte(np, &data[x], (x == (len - 1)), gpreg, gpcntl);
+
+	for (x = 6, csum = 0; x < len - 6; x++)
+		csum += data[x];
+
+	return csum;
+}
+
+/*
+ * Send START condition to NVRAM to wake it up.
+ */
+__initfunc(
+static void nvram_start(ncr_slot *np, u_char *gpreg)
+)
+{
+	nvram_setBit(np, 1, gpreg, SET_BIT);
+	nvram_setBit(np, 0, gpreg, SET_CLK);
+	nvram_setBit(np, 0, gpreg, CLR_BIT);
+	nvram_setBit(np, 0, gpreg, CLR_CLK);
+}
+
+/*
+ * WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
+ * GPIO0 must already be set as an output
+ */
+__initfunc(
+static void nvram_write_byte(ncr_slot *np, u_char *ack_data, u_char write_data, u_char *gpreg, u_char *gpcntl)
+)
+{
+	int x;
+	
+	for (x = 0; x < 8; x++)
+		nvram_doBit(np, 0, (write_data >> (7 - x)) & 0x01, gpreg);
+		
+	nvram_readAck(np, ack_data, gpreg, gpcntl);
+}
+
+/*
+ * READ a byte from the NVRAM and then send an ACK to say we have got it,
+ * GPIO0 must already be set as an input
+ */
+__initfunc(
+static void nvram_read_byte(ncr_slot *np, u_char *read_data, u_char ack_data, u_char *gpreg, u_char *gpcntl)
+)
+{
+	int x;
+	u_char read_bit;
+
+	*read_data = 0;
+	for (x = 0; x < 8; x++) {
+		nvram_doBit(np, &read_bit, 1, gpreg);
+		*read_data |= ((read_bit & 0x01) << (7 - x));
+	}
+
+	nvram_writeAck(np, ack_data, gpreg, gpcntl);
+}
+
+/*
+ * Output an ACK to the NVRAM after reading,
+ * change GPIO0 to output and when done back to an input
+ */
+__initfunc(
+static void nvram_writeAck(ncr_slot *np, u_char write_bit, u_char *gpreg, u_char *gpcntl)
+)
+{
+	OUTB (nc_gpcntl, *gpcntl & 0xfe);
+	nvram_doBit(np, 0, write_bit, gpreg);
+	OUTB (nc_gpcntl, *gpcntl);
+}
+
+/*
+ * Input an ACK from NVRAM after writing,
+ * change GPIO0 to input and when done back to an output
+ */
+__initfunc(
+static void nvram_readAck(ncr_slot *np, u_char *read_bit, u_char *gpreg, u_char *gpcntl)
+)
+{
+	OUTB (nc_gpcntl, *gpcntl | 0x01);
+	nvram_doBit(np, read_bit, 1, gpreg);
+	OUTB (nc_gpcntl, *gpcntl);
+}
+
+/*
+ * Read or write a bit to the NVRAM,
+ * read if GPIO0 input else write if GPIO0 output
+ */
+__initfunc(
+static void nvram_doBit(ncr_slot *np, u_char *read_bit, u_char write_bit, u_char *gpreg)
+)
+{
+	nvram_setBit(np, write_bit, gpreg, SET_BIT);
+	nvram_setBit(np, 0, gpreg, SET_CLK);
+	if (read_bit)
+		*read_bit = INB (nc_gpreg);
+	nvram_setBit(np, 0, gpreg, CLR_CLK);
+	nvram_setBit(np, 0, gpreg, CLR_BIT);
+}
+
+/*
+ * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
+ */
+__initfunc(
+static void nvram_stop(ncr_slot *np, u_char *gpreg)
+)
+{
+	nvram_setBit(np, 0, gpreg, SET_CLK);
+	nvram_setBit(np, 1, gpreg, SET_BIT);
+}
+
+/*
+ * Set/clear data/clock bit in GPIO0
+ */
+__initfunc(
+static void nvram_setBit(ncr_slot *np, u_char write_bit, u_char *gpreg, int bit_mode)
+)
+{
+	DELAY(5);
+	switch (bit_mode){
+	case SET_BIT:
+		*gpreg |= write_bit;
+		break;
+	case CLR_BIT:
+		*gpreg &= 0xfe;
+		break;
+	case SET_CLK:
+		*gpreg |= 0x02;
+		break;
+	case CLR_CLK:
+		*gpreg &= 0xfd;
+		break;
+
+	}
+	OUTB (nc_gpreg, *gpreg);
+	DELAY(5);
+}
+
+#undef SET_BIT 0
+#undef CLR_BIT 1
+#undef SET_CLK 2
+#undef CLR_CLK 3
+
+
+/* ---------------------------------------------------------------------
+**
+**	Try reading Tekram format nvram
+**
+** ---------------------------------------------------------------------
+**
+** GPOI0 - data in
+** GPIO1 - data out
+** GPIO2 - clock
+** GPIO4 - chip select
+**
+**	return 0 if NVRAM data OK, 1 if NVRAM data not OK
+** ---------------------------------------------------------------------
+*/
+
+static u_short Tnvram_read_data(ncr_slot *np, u_short *data, int len, u_char *gpreg);
+static void Tnvram_Send_Command(ncr_slot *np, u_short write_data, u_char *read_bit, u_char *gpreg);
+static void Tnvram_Read_Word(ncr_slot *np, u_short *nvram_data, u_char *gpreg);
+static void Tnvram_Read_Bit(ncr_slot *np, u_char *read_bit, u_char *gpreg);
+static void Tnvram_Write_Bit(ncr_slot *np, u_char write_bit, u_char *gpreg);
+static void Tnvram_Stop(ncr_slot *np, u_char *gpreg);
+static void Tnvram_Clk(ncr_slot *np, u_char *gpreg);
+
+__initfunc(
+static int ncr_get_Tekram_nvram (ncr_slot *np, Tekram_nvram *nvram)
+)
+{
+	u_char gpcntl, gpreg;
+	u_char old_gpcntl, old_gpreg;
+	u_short csum;
+
+	/* save current state of GPCNTL and GPREG */
+	old_gpreg	= INB (nc_gpreg);
+	old_gpcntl	= INB (nc_gpcntl);
+
+	/* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in,
+	   1/2/4 out */
+	gpreg = old_gpreg & 0xe9;
+	OUTB (nc_gpreg, gpreg);
+	gpcntl = (old_gpcntl & 0xe9) | 0x09;
+	OUTB (nc_gpcntl, gpcntl);
+
+	/* input all of NVRAM, 64 words */
+	csum = Tnvram_read_data(np, (u_short *) nvram,
+			sizeof(*nvram) / sizeof(short), &gpreg);
+	
+	/* return GPIO0/1/2/4 to original states after having accessed NVRAM */
+	OUTB (nc_gpcntl, old_gpcntl);
+	OUTB (nc_gpreg,  old_gpreg);
+
+	/* check data valid */
+	if (csum != 0x1234)
+		return 1;
+
+	return 0;
+}
+
+/*
+ * Read Tekram NvRAM data and compute checksum.
+ */
+__initfunc(
+static u_short Tnvram_read_data(ncr_slot *np, u_short *data, int len, u_char *gpreg)
+)
+{
+	u_char	read_bit;
+	u_short	csum;
+	int	x;
+
+	for (x = 0, csum = 0; x < len; x++)  {
+
+		/* output read command and address */
+		Tnvram_Send_Command(np, 0x180 | x, &read_bit, gpreg);
+		if (read_bit & 0x01)
+			return 0; /* Force bad checksum */
+
+		Tnvram_Read_Word(np, &data[x], gpreg);
+		csum += data[x];
+
+		Tnvram_Stop(np, gpreg);
+	}
+
+	return csum;
+}
+
+/*
+ * Send read command and address to NVRAM
+ */
+__initfunc(
+static void Tnvram_Send_Command(ncr_slot *np, u_short write_data, u_char *read_bit, u_char *gpreg)
+)
+{
+	int x;
+
+	/* send 9 bits, start bit (1), command (2), address (6)  */
+	for (x = 0; x < 9; x++)
+		Tnvram_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg);
+
+	*read_bit = INB (nc_gpreg);
+}
+
+/*
+ * READ a byte from the NVRAM
+ */
+__initfunc(
+static void Tnvram_Read_Word(ncr_slot *np, u_short *nvram_data, u_char *gpreg)
+)
+{
+	int x;
+	u_char read_bit;
+
+	*nvram_data = 0;
+	for (x = 0; x < 16; x++) {
+		Tnvram_Read_Bit(np, &read_bit, gpreg);
+
+		if (read_bit & 0x01)
+			*nvram_data |=  (0x01 << (15 - x));
+		else
+			*nvram_data &= ~(0x01 << (15 - x));
+	}
+}
+
+/* 
+ * Read bit from NVRAM
+ */
+__initfunc(
+static void Tnvram_Read_Bit(ncr_slot *np, u_char *read_bit, u_char *gpreg)
+)
+{
+	DELAY(2);
+	Tnvram_Clk(np, gpreg);
+	*read_bit = INB (nc_gpreg);
+}
+
+/*
+ * Write bit to GPIO0
+ */
+__initfunc(
+static void Tnvram_Write_Bit(ncr_slot *np, u_char write_bit, u_char *gpreg)
+)
+{
+	if (write_bit & 0x01)
+		*gpreg |= 0x02;
+	else
+		*gpreg &= 0xfd;
+		
+	*gpreg |= 0x10;
+		
+	OUTB (nc_gpreg, *gpreg);
+	DELAY(2);
+
+	Tnvram_Clk(np, gpreg);
+}
+
+/*
+ * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
+ */
+__initfunc(
+static void Tnvram_Stop(ncr_slot *np, u_char *gpreg)
+)
+{
+	*gpreg &= 0xef;
+	OUTB (nc_gpreg, *gpreg);
+	DELAY(2);
+
+	Tnvram_Clk(np, gpreg);
+}
+
+/*
+ * Pulse clock bit in GPIO0
+ */
+__initfunc(
+static void Tnvram_Clk(ncr_slot *np, u_char *gpreg)
+)
+{
+	OUTB (nc_gpreg, *gpreg | 0x04);
+	DELAY(2);
+	OUTB (nc_gpreg, *gpreg);
+}
+
+#endif	/* SCSI_NCR_NVRAM_SUPPORT */
+
+/*
+**	Module stuff
+*/
+
+#ifdef MODULE
+Scsi_Host_Template driver_template = NCR53C8XX;
+#include "scsi_module.c"
+#endif