Initial source

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diff --git a/chips/xcfb_hdw.c b/chips/xcfb_hdw.c
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File: xcfb_hdw.c
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	1/92
+ *
+ *	Driver for the MAXine Color Frame Buffer Display,
+ *	hardware-level operations.
+ */
+
+#include <xcfb.h>
+#if	(NXCFB > 0)
+
+#include <platforms.h>
+
+#include <machine/machspl.h>
+#include <mach/std_types.h>
+#include <chips/busses.h>
+
+#include <chips/screen_defs.h>
+#include <chips/pm_defs.h>
+#include <machine/machspl.h>
+
+#ifdef	MAXINE
+
+#include <chips/xcfb_monitor.h>
+
+#include <mips/PMAX/pmag_xine.h>
+#include <mips/PMAX/tc.h>
+#define	enable_interrupt(s,o,x)	(*tc_enable_interrupt)(s,o,x)
+
+#else	/* MAXINE */
+You must say the magic words to get the coockies:
+#define enable_interrupt(slot,on,xx)
+#define	IMS332_ADDRESS
+#define	VRAM_OFFSET
+#define	IMS332_RESET_ADDRESS
+#endif	/* MAXINE */
+
+typedef pm_softc_t	xcfb_softc_t;
+
+
+/*
+ * Definition of the driver for the auto-configuration program.
+ */
+
+int	xcfb_probe(), xcfb_intr();
+static void	xcfb_attach();
+
+vm_offset_t	xcfb_std[NXCFB] = { 0 };
+struct	bus_device *xcfb_info[NXCFB];
+struct	bus_driver xcfb_driver = 
+        { xcfb_probe, 0, xcfb_attach, 0, xcfb_std, "xcfb", xcfb_info,
+	  0, 0, BUS_INTR_DISABLED};
+
+/*
+ * Probe/Attach functions
+ */
+
+xcfb_probe( /* reg, ui */)
+{
+	static probed_once = 0;
+
+	/*
+	 * Probing was really done sweeping the TC long ago
+	 */
+	if (tc_probe("xcfb") == 0)
+		return 0;
+	if (probed_once++ > 1)
+		printf("[mappable] ");
+	return 1;
+}
+
+static void
+xcfb_attach(ui)
+	struct bus_device *ui;
+{
+	/* ... */
+	printf(": color display");
+}
+
+
+/*
+ * Interrupt routine
+ */
+
+xcfb_intr(unit,spllevel)
+	spl_t	spllevel;
+{
+	/* interrupt has been acknowledge already */
+#if 0
+	splx(spllevel);
+	/* XXX make it load the unsafe things */
+#endif
+}
+
+xcfb_vretrace(xcfb, on)
+	xcfb_softc_t	*xcfb;
+{
+	int i;
+
+	for (i = 0; i < NXCFB; i++)
+		if (xcfb_info[i]->address == (vm_offset_t)xcfb->framebuffer)
+			break;
+	if (i == NXCFB) return;
+
+	enable_interrupt(xcfb_info[i]->adaptor, on, 0);
+}
+
+/*
+ * Boot time initialization: must make device
+ * usable as console asap.
+ */
+
+/* some of these values are made up using ad hocery */
+static struct xcfb_monitor_type monitors[] = {
+	{ "VRM17", 1024, 768, 1024, 1024, 16, 33,
+		  6, 2, 2, 21, 326, 16, 10, 10 },
+	/* XXX Add VRC16 */
+	{ "VR262", 1024, 864, 1024, 1024, 16, 35,
+		  5, 3, 3, 37, 330, 16, 10, 10 },
+	{ "VR299", 1024, 864, 1024, 1024, 16, 35,
+		  5, 3, 3, 37, 330, 16, 10, 10 },
+	{ 0 }};
+
+/* set from prom command line */
+extern unsigned char *monitor_types[4];
+
+xcfb_monitor_type_t xcfb_get_monitor_type()
+{
+	xcfb_monitor_type_t	m;
+
+	m = monitors;
+	if (monitor_types[3])
+		while (m->name) {	
+			/* xcfb is always on the motherboard (slot 3),
+			   fix if you need */
+			if (!strcmp(monitor_types[3], m->name))
+				break;
+			m++;
+		}
+	if (!m->name)		/* the first is the default */
+		m = monitors;
+	return m;
+}
+	
+
+extern int
+	xcfb_soft_reset(), xcfb_set_status(),
+	ims332_pos_cursor(), ims332_video_on(),
+	ims332_video_off(), xcfb_vretrace(),
+	pm_get_status(), pm_char_paint(),
+	pm_insert_line(), pm_remove_line(),
+	pm_clear_bitmap(), pm_map_page();
+
+static struct screen_switch xcfb_sw = {
+	screen_noop,		/* graphic_open */
+	xcfb_soft_reset,	/* graphic_close */
+	xcfb_set_status,	/* set_status */
+	pm_get_status,		/* get_status */
+	pm_char_paint,		/* char_paint */
+	ims332_pos_cursor,	/* pos_cursor */
+	pm_insert_line,		/* insert_line */
+	pm_remove_line,		/* remove_line */
+	pm_clear_bitmap,	/* clear_bitmap */
+	ims332_video_on,	/* video_on */
+	ims332_video_off,	/* video_off */
+	xcfb_vretrace,		/* intr_enable */
+	pm_map_page		/* map_page */
+};
+
+xcfb_cold_init(unit, up)
+	user_info_t	*up;
+{
+	xcfb_softc_t	*xcfb;
+	screen_softc_t	sc = screen(unit);
+	int		base = tc_probe("xcfb");
+	xcfb_monitor_type_t m = xcfb_get_monitor_type();
+
+	bcopy(&xcfb_sw, &sc->sw, sizeof(sc->sw));
+
+	sc->flags |= COLOR_SCREEN; /* XXX should come from m->flags? */
+	sc->frame_scanline_width = m->frame_scanline_width;
+	sc->frame_height = m->frame_height;
+	sc->frame_visible_width = m->frame_visible_width;
+	sc->frame_visible_height = m->frame_visible_height;
+
+	pm_init_screen_params(sc, up);
+	(void) screen_up(unit, up);
+
+	xcfb = pm_alloc(unit, IMS332_ADDRESS, base + VRAM_OFFSET, 0);
+	xcfb->vdac_registers = (char *)IMS332_RESET_ADDRESS;
+
+	screen_default_colors(up);
+
+	xcfb_soft_reset(sc);
+
+	/*
+	 * Clearing the screen at boot saves from scrolling
+	 * much, and speeds up booting quite a bit.
+	 */
+	screen_blitc( unit, 'C'-'@');/* clear screen */
+}
+
+
+#endif	(NXCFB > 0)