From 1d34167488e56e36ad702627b17be7ac18a9db9c Mon Sep 17 00:00:00 2001 From: Damien Zammit Date: Sun, 10 Nov 2019 16:27:42 +0100 Subject: simplify interrupt handling We have removed spl levels, now remove the machinery to manage different PIC masks according to levels. Only keep machinery to disable interrupts whatever the level. * i386/i386/pic.c (pic_mask): Remove array. (picinit): Do not form PIC mask. Set initial PIC mask to 0. (form_pic_mask): Remove function. * i386/i386/pic.h (form_pic_mask, pic_mask): Remove declarations. * i386/i386/spl.S (SETMASK): Remove macro. (XEN_SETMASK): Add macro, containing the Xen version of SETMASK. (spl0, splx_cli, spl) [MACH_XEN]: Call XEN_SETMASK instead of SETMASK. * i386/i386/pit.c (clkstart): Do not call form_pic_mask. * i386/i386at/autoconf.c (take_dev_irq, take_ctlr_irq): Likewise. * i386/i386at/kd_mouse.c (kd_mouse_open, kd_mouse_close): Likewise. * linux/dev/arch/i386/kernel/irq.c (mask_irq, unmask_irq): Directly update curr_pic_mask without using pic_mask array. (init_IRQ, restore_IRQ): do not call form_pic_mask. * linux/dev/include/asm-i386/system.h: Include . (__save_flags, __restore_flags): Use curr_ipl and splx instead of hardware flags. * linux/dev/init/main.c (linux_init): Do not call cli. * linux/dev/kernel/sched.c (linux_timer_intr): Do not use pic_mask. * linux/src/drivers/block/ide.c (try_to_identify): Disable irq probing. * linux/src/drivers/scsi/NCR53c406a.c (NCR53c406a_detect): Disable irq probing. --- linux/dev/include/asm-i386/system.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'linux/dev/include/asm-i386/system.h') diff --git a/linux/dev/include/asm-i386/system.h b/linux/dev/include/asm-i386/system.h index f26a33e7..41eb65a4 100644 --- a/linux/dev/include/asm-i386/system.h +++ b/linux/dev/include/asm-i386/system.h @@ -1,6 +1,8 @@ #ifndef __ASM_SYSTEM_H #define __ASM_SYSTEM_H +#include /* curr_ipl, splx */ + #include /* @@ -223,10 +225,8 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size) #define mb() __asm__ __volatile__ ("" : : :"memory") #define __sti() __asm__ __volatile__ ("sti": : :"memory") #define __cli() __asm__ __volatile__ ("cli": : :"memory") -#define __save_flags(x) \ -__asm__ __volatile__("pushf ; pop %0" : "=r" (x): /* no input */ :"memory") -#define __restore_flags(x) \ -__asm__ __volatile__("push %0 ; popf": /* no output */ :"g" (x):"memory") +#define __save_flags(x) (x = ((curr_ipl > 0) ? 0 : (1 << 9))) +#define __restore_flags(x) splx((x & (1 << 9)) ? 0 : 7) #ifdef __SMP__ -- cgit v1.2.3