vga_isa.c is now generic, not i386 specific (src/sys/isa/vga_isa.c)

1 files changed, 0 insertions, 2241 deletions

diff --git a/sys/i386/isa/vga_isa.c b/sys/i386/isa/vga_isa.c
deleted file mode 100644
index 38d46e5..0000000
--- a/sys/i386/isa/vga_isa.c
+++ /dev/null
@@ -1,2241 +0,0 @@
-/*-
- * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
- * Copyright (c) 1992-1998 Søren Schmidt
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer as
- *    the first lines of this file unmodified.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $Id: vga_isa.c,v 1.4 1999/02/05 12:58:40 yokota Exp $
- */
-
-#include "vga.h"
-#include "opt_vga.h"
-#include "opt_fb.h"
-#include "opt_syscons.h"	/* should be removed in the future, XXX */
-
-#if NVGA > 0
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/bus.h>
-#include <sys/malloc.h>
-
-#include <vm/vm.h>
-#include <vm/pmap.h>
-
-#include <machine/console.h>
-#include <machine/md_var.h>
-#include <machine/pc/bios.h>
-
-#include <dev/fb/fbreg.h>
-#include <dev/fb/vgareg.h>
-
-#ifndef __i386__
-#include <isa/isareg.h>
-#include <isa/isavar.h>
-#else
-#include <i386/isa/isa.h>
-#include <i386/isa/isa_device.h>
-#endif
-
-#define DRIVER_NAME		"vga"
-
-/* cdev driver declaration */
-
-#define ISAVGA_UNIT(dev)	minor(dev)
-#define ISAVGA_MKMINOR(unit)	(unit)
-
-typedef struct isavga_softc {
-	video_adapter_t	*adp;
-} isavga_softc_t;
-
-#ifndef __i386__
-
-#define ISAVGA_SOFTC(unit)		\
-	((isavga_softc_t *)devclass_get_softc(isavga_devclass, unit))
-
-devclass_t		isavga_devclass;
-
-static int		isavga_probe(device_t dev);
-static int		isavga_attach(device_t dev);
-
-static device_method_t isavga_methods[] = {
-	DEVMETHOD(device_probe,		isavga_probe),
-	DEVMETHOD(device_attach,	isavga_attach),
-	{ 0, 0 }
-};
-
-static driver_t isavga_driver = {
-	DRIVER_NAME,
-	isavga_methods,
-	DRIVER_TYPE_TTY,
-	sizeof(isavga_softc_t),
-};
-
-#else /* __i386__ */
-
-#define ISAVGA_SOFTC(unit)	(isavga_softc[unit])
-
-static isavga_softc_t	*isavga_softc[NVGA];
-
-static int		isavga_probe(struct isa_device *dev);
-static int		isavga_attach(struct isa_device *dev);
-
-struct isa_driver vgadriver = {
-	isavga_probe,
-	isavga_attach,
-	DRIVER_NAME,
-	0,
-};
-
-#endif /* __i386__ */
-
-static int		isavga_probe_unit(int unit, isavga_softc_t *sc,
-					  int flags);
-static int		isavga_attach_unit(int unit, isavga_softc_t *sc,
-					   int flags);
-
-#ifdef FB_INSTALL_CDEV
-
-static d_open_t		isavgaopen;
-static d_close_t	isavgaclose;
-static d_read_t		isavgaread;
-static d_ioctl_t	isavgaioctl;
-
-static struct  cdevsw vga_cdevsw = {
-	isavgaopen,	isavgaclose,	noread,		nowrite,	/* ?? */
-	isavgaioctl,	nostop,		nullreset,	nodevtotty,
-	seltrue,	nommap,		NULL,		DRIVER_NAME,
-	NULL,		-1,		nodump,		nopsize,
-};
-
-#endif /* FB_INSTALL_CDEV */
-
-#ifndef __i386__
-
-static int
-isavga_probe(device_t dev)
-{
-	isavga_softc_t *sc;
-
-	sc = device_get_softc(dev);
-	return isavga_probe_unit(device_get_unit(dev), sc, isa_get_flags(dev));
-}
-
-static int
-isavga_attach(device_t dev)
-{
-	isavga_softc_t *sc;
-
-	sc = device_get_softc(dev);
-	return isavga_attach_unit(device_get_unit(dev), sc, isa_get_flags(dev));
-}
-
-#else /* __i386__ */
-
-static int
-isavga_probe(struct isa_device *dev)
-{
-	isavga_softc_t *sc;
-	int error;
-
-	if (dev->id_unit >= sizeof(isavga_softc)/sizeof(isavga_softc[0]))
-		return 0;
-	sc = isavga_softc[dev->id_unit]
-	   = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
-	if (sc == NULL)
-		return 0;
-
-	error = isavga_probe_unit(dev->id_unit, sc, dev->id_flags);
-	if (error) {
-		isavga_softc[dev->id_unit] = NULL;
-		free(sc, M_DEVBUF);
-		return 0;
-	}
-
-	dev->id_iobase = sc->adp->va_io_base;
-	dev->id_maddr = (caddr_t)BIOS_PADDRTOVADDR(sc->adp->va_mem_base);
-	dev->id_msize = sc->adp->va_mem_size;
-
-	return sc->adp->va_io_size;
-}
-
-static int
-isavga_attach(struct isa_device *dev)
-{
-	isavga_softc_t *sc;
-
-	if (dev->id_unit >= sizeof(isavga_softc)/sizeof(isavga_softc[0]))
-		return 0;
-	sc = isavga_softc[dev->id_unit];
-	if (sc == NULL)
-		return 0;
-
-	return ((isavga_attach_unit(dev->id_unit, sc, dev->id_flags)) ? 0 : 1);
-}
-
-#endif /* __i386__ */
-
-static int
-isavga_probe_unit(int unit, isavga_softc_t *sc, int flags)
-{
-	video_switch_t *sw;
-
-	bzero(sc, sizeof(*sc));
-	sw = vid_get_switch(DRIVER_NAME);
-	if (sw == NULL)
-		return 0;
-	return (*sw->probe)(unit, &sc->adp, NULL, flags);
-}
-
-static int
-isavga_attach_unit(int unit, isavga_softc_t *sc, int flags)
-{
-	video_switch_t *sw;
-	int error;
-
-	sw = vid_get_switch(DRIVER_NAME);
-	if (sw == NULL)
-		return ENXIO;
-
-	error = (*sw->init)(unit, sc->adp, flags);
-	if (error)
-		return ENXIO;
-
-#ifdef FB_INSTALL_CDEV
-	/* attach a virtual frame buffer device */
-	error = fb_attach(makedev(0, ISAVGA_MKMINOR(unit)), scp->adp,
-			  &vga_cdevsw);
-	if (error)
-		return error;
-#endif /* FB_INSTALL_CDEV */
-
-	if (bootverbose)
-		(*vidsw[sc->adp->va_index]->diag)(sc->adp, bootverbose);
-
-	return 0;
-}
-
-/* LOW-LEVEL */
-
-#include <machine/clock.h>
-#include <machine/pc/vesa.h>
-
-#define probe_done(adp)		((adp)->va_flags & V_ADP_PROBED)
-#define init_done(adp)		((adp)->va_flags & V_ADP_INITIALIZED)
-#define config_done(adp)	((adp)->va_flags & V_ADP_REGISTERED)
-
-/* for compatibility with old kernel options */
-#ifdef SC_ALT_SEQACCESS
-#undef SC_ALT_SEQACCESS
-#undef VGA_ALT_SEQACCESS
-#define VGA_ALT_SEQACCESS	1
-#endif
-
-#ifdef SLOW_VGA
-#undef SLOW_VGA
-#undef VGA_SLOW_IOACCESS
-#define VGA_SLOW_IOACCESS	1
-#endif
-
-/* architecture dependent option */
-#ifdef __alpha__
-#define VGA_NO_BIOS		1
-#endif
-
-/* this should really be in `rtc.h' */
-#define RTC_EQUIPMENT           0x14
-
-/* various sizes */
-#define V_MODE_MAP_SIZE		(M_VGA_CG320 + 1)
-#define V_MODE_PARAM_SIZE	64
-
-/* video adapter state buffer */
-struct adp_state {
-    int			sig;
-#define V_STATE_SIG	0x736f6962
-    u_char		regs[V_MODE_PARAM_SIZE];
-};
-typedef struct adp_state adp_state_t;
-
-/* video adapter information */
-#define DCC_MONO	0
-#define DCC_CGA40	1
-#define DCC_CGA80	2
-#define DCC_EGAMONO	3
-#define DCC_EGA40	4
-#define DCC_EGA80	5
-
-/* 
- * NOTE: `va_window' should have a virtual address, but is initialized
- * with a physical address in the following table, as verify_adapter()
- * will perform address conversion at run-time.
- */
-static video_adapter_t adapter_init_value[] = {
-    /* DCC_MONO */
-    { 0, KD_MONO, "mda", 0, 0, 0, 	    IO_MDA, IO_MDASIZE, MONO_CRTC,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 
-      0, 0, 0, 7, 0, },
-    /* DCC_CGA40 */
-    { 0, KD_CGA,  "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
-      0, 0, 0, 3, 0, },
-    /* DCC_CGA80 */
-    { 0, KD_CGA,  "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
-      0, 0, 0, 3, 0, },
-    /* DCC_EGAMONO */
-    { 0, KD_EGA,  "ega", 0, 0, 0,	    IO_MDA, 48,	  MONO_CRTC,
-      EGA_BUF_BASE, EGA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 
-      0, 0, 0, 7, 0, },
-    /* DCC_EGA40 */
-    { 0, KD_EGA,  "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48,	  COLOR_CRTC,
-      EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
-      0, 0, 0, 3, 0, },
-    /* DCC_EGA80 */
-    { 0, KD_EGA,  "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48,	  COLOR_CRTC,
-      EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
-      0, 0, 0, 3, 0, },
-};
-
-static video_adapter_t	biosadapter[2];
-static int		biosadapters = 0;
-
-/* video driver declarations */
-static int			vga_configure(int flags);
-       int			(*vga_sub_configure)(int flags);
-static int			vga_nop(void);
-static vi_probe_t		vga_probe;
-static vi_init_t		vga_init;
-static vi_get_info_t		vga_get_info;
-static vi_query_mode_t		vga_query_mode;
-static vi_set_mode_t		vga_set_mode;
-static vi_save_font_t		vga_save_font;
-static vi_load_font_t		vga_load_font;
-static vi_show_font_t		vga_show_font;
-static vi_save_palette_t	vga_save_palette;
-static vi_load_palette_t	vga_load_palette;
-static vi_set_border_t		vga_set_border;
-static vi_save_state_t		vga_save_state;
-static vi_load_state_t		vga_load_state;
-static vi_set_win_org_t		vga_set_origin;
-static vi_read_hw_cursor_t	vga_read_hw_cursor;
-static vi_set_hw_cursor_t	vga_set_hw_cursor;
-static vi_set_hw_cursor_shape_t	vga_set_hw_cursor_shape;
-static vi_mmap_t		vga_mmap;
-static vi_diag_t		vga_diag;
-
-static video_switch_t vgavidsw = {
-	vga_probe,
-	vga_init,
-	vga_get_info,
-	vga_query_mode,	
-	vga_set_mode,
-	vga_save_font,
-	vga_load_font,
-	vga_show_font,
-	vga_save_palette,
-	vga_load_palette,
-	vga_set_border,
-	vga_save_state,
-	vga_load_state,
-	vga_set_origin,
-	vga_read_hw_cursor,
-	vga_set_hw_cursor,
-	vga_set_hw_cursor_shape,
-	(vi_blank_display_t *)vga_nop,
-	vga_mmap,
-	vga_diag,
-};
-
-VIDEO_DRIVER(mda, vgavidsw, NULL);
-VIDEO_DRIVER(cga, vgavidsw, NULL);
-VIDEO_DRIVER(ega, vgavidsw, NULL);
-VIDEO_DRIVER(vga, vgavidsw, vga_configure);
-
-/* VGA BIOS standard video modes */
-#define EOT		(-1)
-#define NA		(-2)
-
-static video_info_t bios_vmode[] = {
-    /* CGA */
-    { M_B40x25,     V_INFO_COLOR, 40, 25, 8,  8, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_C40x25,     V_INFO_COLOR, 40, 25, 8,  8, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_B80x25,     V_INFO_COLOR, 80, 25, 8,  8, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_C80x25,     V_INFO_COLOR, 80, 25, 8,  8, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    /* EGA */
-    { M_ENH_B40x25, V_INFO_COLOR, 40, 25, 8, 14, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_ENH_C40x25, V_INFO_COLOR, 40, 25, 8, 14, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_ENH_B80x25, V_INFO_COLOR, 80, 25, 8, 14, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_ENH_C80x25, V_INFO_COLOR, 80, 25, 8, 14, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    /* VGA */
-    { M_VGA_C40x25, V_INFO_COLOR, 40, 25, 8, 16, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_VGA_M80x25, 0,            80, 25, 8, 16, 2, 1,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
-    { M_VGA_C80x25, V_INFO_COLOR, 80, 25, 8, 16, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    /* MDA */
-    { M_EGAMONO80x25, 0,          80, 25, 8, 14, 2, 1,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
-    /* EGA */
-    { M_ENH_B80x43, V_INFO_COLOR, 80, 43, 8,  8, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_ENH_C80x43, V_INFO_COLOR, 80, 43, 8,  8, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    /* VGA */
-    { M_VGA_M80x30, 0,            80, 30, 8, 16, 2, 1,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
-    { M_VGA_C80x30, V_INFO_COLOR, 80, 30, 8, 16, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_VGA_M80x50, 0,            80, 50, 8,  8, 2, 1,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
-    { M_VGA_C80x50, V_INFO_COLOR, 80, 50, 8,  8, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_VGA_M80x60, 0,            80, 60, 8,  8, 2, 1,
-      MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
-    { M_VGA_C80x60, V_INFO_COLOR, 80, 60, 8,  8, 4, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-#ifndef VGA_NO_MODE_CHANGE
-    /* CGA */
-    { M_BG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_CG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    { M_BG640,      V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 1, 1,
-      CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
-    /* EGA */
-    { M_CG320_D,    V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_CG640_E,    V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_EGAMONOAPA, V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, 64*1024, 0, 0 },
-    { M_ENHMONOAPA2,V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_CG640x350,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 2, 2,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_ENH_CG640,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    /* VGA */
-    { M_BG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_CG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_VGA_CG320,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 8, 1,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-    { M_VGA_MODEX,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 240, 8,  8, 8, 1,
-      GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
-#endif /* VGA_NO_MODE_CHANGE */
-
-    { EOT },
-};
-
-static int		init_done = FALSE;
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-static u_char		*video_mode_ptr = NULL;		/* EGA/VGA */
-static u_char		*video_mode_ptr2 = NULL;	/* CGA/MDA */
-#endif
-static u_char		*mode_map[V_MODE_MAP_SIZE];
-static adp_state_t	adpstate;
-static adp_state_t	adpstate2;
-static int		rows_offset = 1;
-
-/* local macros and functions */
-#define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
-
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-static void map_mode_table(u_char *map[], u_char *table, int max);
-#endif
-static void clear_mode_map(video_adapter_t *adp, u_char *map[], int max,
-			   int color);
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-static int map_mode_num(int mode);
-#endif
-static int map_gen_mode_num(int type, int color, int mode);
-static int map_bios_mode_num(int type, int color, int bios_mode);
-static u_char *get_mode_param(int mode);
-#ifndef VGA_NO_BIOS
-static void fill_adapter_param(int code, video_adapter_t *adp);
-#endif
-static int verify_adapter(video_adapter_t *adp);
-static void update_adapter_info(video_adapter_t *adp, video_info_t *info);
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-#define COMP_IDENTICAL	0
-#define COMP_SIMILAR	1
-#define COMP_DIFFERENT	2
-static int comp_adpregs(u_char *buf1, u_char *buf2);
-#endif
-static int probe_adapters(void);
-
-#ifndef VGA_NO_FONT_LOADING
-#define PARAM_BUFSIZE	6
-static void set_font_mode(video_adapter_t *adp, u_char *buf);
-static void set_normal_mode(video_adapter_t *adp, u_char *buf);
-#endif
-
-static void dump_buffer(u_char *buf, size_t len);
-
-#define	ISMAPPED(pa, width)				\
-	(((pa) <= (u_long)0x1000 - (width)) 		\
-	 || ((pa) >= ISA_HOLE_START && (pa) <= 0x100000 - (width)))
-
-#define	prologue(adp, flag, err)			\
-	if (!init_done || !((adp)->va_flags & (flag)))	\
-	    return (err)
-
-/* a backdoor for the console driver */
-static int
-vga_configure(int flags)
-{
-    int i;
-
-    probe_adapters();
-    for (i = 0; i < biosadapters; ++i) {
-	if (!probe_done(&biosadapter[i]))
-	    continue;
-	biosadapter[i].va_flags |= V_ADP_INITIALIZED;
-	if (!config_done(&biosadapter[i])) {
-	    if (vid_register(&biosadapter[i]) < 0)
-		continue;
-	    biosadapter[i].va_flags |= V_ADP_REGISTERED;
-	}
-    }
-    if (vga_sub_configure != NULL)
-	(*vga_sub_configure)(flags);
-
-    return biosadapters;
-}
-
-/* local subroutines */
-
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-/* construct the mode parameter map */
-static void
-map_mode_table(u_char *map[], u_char *table, int max)
-{
-    int i;
-
-    for(i = 0; i < max; ++i)
-	map[i] = table + i*V_MODE_PARAM_SIZE;
-    for(; i < V_MODE_MAP_SIZE; ++i)
-	map[i] = NULL;
-}
-#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
-
-static void
-clear_mode_map(video_adapter_t *adp, u_char *map[], int max, int color)
-{
-    video_info_t info;
-    int i;
-
-    /*
-     * NOTE: we don't touch `bios_vmode[]' because it is shared
-     * by all adapters.
-     */
-    for(i = 0; i < max; ++i) {
-	if (vga_get_info(adp, i, &info))
-	    continue;
-	if ((info.vi_flags & V_INFO_COLOR) != color)
-	    map[i] = NULL;
-    }
-}
-
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-/* map the non-standard video mode to a known mode number */
-static int
-map_mode_num(int mode)
-{
-    static struct {
-        int from;
-        int to;
-    } mode_map[] = {
-        { M_ENH_B80x43, M_ENH_B80x25 },
-        { M_ENH_C80x43, M_ENH_C80x25 },
-        { M_VGA_M80x30, M_VGA_M80x25 },
-        { M_VGA_C80x30, M_VGA_C80x25 },
-        { M_VGA_M80x50, M_VGA_M80x25 },
-        { M_VGA_C80x50, M_VGA_C80x25 },
-        { M_VGA_M80x60, M_VGA_M80x25 },
-        { M_VGA_C80x60, M_VGA_C80x25 },
-        { M_VGA_MODEX,  M_VGA_CG320 },
-    };
-    int i;
-
-    for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
-        if (mode_map[i].from == mode)
-            return mode_map[i].to;
-    }
-    return mode;
-}
-#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
-
-/* map a generic video mode to a known mode number */
-static int
-map_gen_mode_num(int type, int color, int mode)
-{
-    static struct {
-	int from;
-	int to_color;
-	int to_mono;
-    } mode_map[] = {
-	{ M_TEXT_80x30,	M_VGA_C80x30, M_VGA_M80x30, },
-	{ M_TEXT_80x43,	M_ENH_C80x43, M_ENH_B80x43, },
-	{ M_TEXT_80x50,	M_VGA_C80x50, M_VGA_M80x50, },
-	{ M_TEXT_80x60,	M_VGA_C80x60, M_VGA_M80x60, },
-    };
-    int i;
-
-    if (mode == M_TEXT_80x25) {
-	switch (type) {
-
-	case KD_VGA:
-	    if (color)
-		return M_VGA_C80x25;
-	    else
-		return M_VGA_M80x25;
-	    break;
-
-	case KD_EGA:
-	    if (color)
-		return M_ENH_C80x25;
-	    else
-		return M_EGAMONO80x25;
-	    break;
-
-	case KD_CGA:
-	    return M_C80x25;
-
-	case KD_MONO:
-	case KD_HERCULES:
-	    return M_EGAMONO80x25;	/* XXX: this name is confusing */
-
- 	default:
-	    return -1;
-	}
-    }
-
-    for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
-        if (mode_map[i].from == mode)
-            return ((color) ? mode_map[i].to_color : mode_map[i].to_mono);
-    }
-    return mode;
-}
-
-/* turn the BIOS video number into our video mode number */
-static int
-map_bios_mode_num(int type, int color, int bios_mode)
-{
-    static int cga_modes[7] = {
-	M_B40x25, M_C40x25,		/* 0, 1 */
-	M_B80x25, M_C80x25,		/* 2, 3 */
-	M_BG320, M_CG320,
-	M_BG640,
-    };
-    static int ega_modes[17] = {
-	M_ENH_B40x25, M_ENH_C40x25,	/* 0, 1 */
-	M_ENH_B80x25, M_ENH_C80x25,	/* 2, 3 */
-	M_BG320, M_CG320,
-	M_BG640,
-	M_EGAMONO80x25,			/* 7 */
-	8, 9, 10, 11, 12,
-	M_CG320_D,
-	M_CG640_E,
-	M_ENHMONOAPA2,			/* XXX: video momery > 64K */
-	M_ENH_CG640,			/* XXX: video momery > 64K */
-    };
-    static int vga_modes[20] = {
-	M_VGA_C40x25, M_VGA_C40x25,	/* 0, 1 */
-	M_VGA_C80x25, M_VGA_C80x25,	/* 2, 3 */
-	M_BG320, M_CG320,
-	M_BG640,
-	M_VGA_M80x25,			/* 7 */
-	8, 9, 10, 11, 12,
-	M_CG320_D,
-	M_CG640_E,
-	M_ENHMONOAPA2,
-	M_ENH_CG640,
-	M_BG640x480, M_CG640x480, 
-	M_VGA_CG320,
-    };
-
-    switch (type) {
-
-    case KD_VGA:
-	if (bios_mode < sizeof(vga_modes)/sizeof(vga_modes[0]))
-	    return vga_modes[bios_mode];
-	else if (color)
-	    return M_VGA_C80x25;
-	else
-	    return M_VGA_M80x25;
-	break;
-
-    case KD_EGA:
-	if (bios_mode < sizeof(ega_modes)/sizeof(ega_modes[0]))
-	    return ega_modes[bios_mode];
-	else if (color)
-	    return M_ENH_C80x25;
-	else
-	    return M_EGAMONO80x25;
-	break;
-
-    case KD_CGA:
-	if (bios_mode < sizeof(cga_modes)/sizeof(cga_modes[0]))
-	    return cga_modes[bios_mode];
-	else
-	    return M_C80x25;
-	break;
-
-    case KD_MONO:
-    case KD_HERCULES:
-	return M_EGAMONO80x25;		/* XXX: this name is confusing */
-
-    default:
-	break;
-    }
-    return -1;
-}
-
-/* look up a parameter table entry */
-static u_char 
-*get_mode_param(int mode)
-{
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-    if (mode >= V_MODE_MAP_SIZE)
-	mode = map_mode_num(mode);
-#endif
-    if ((mode >= 0) && (mode < V_MODE_MAP_SIZE))
-	return mode_map[mode];
-    else
-	return NULL;
-}
-
-#ifndef VGA_NO_BIOS
-static void
-fill_adapter_param(int code, video_adapter_t *adp)
-{
-    static struct {
-	int primary;
-	int secondary;
-    } dcc[] = {
-	{ DCC_MONO, 			DCC_EGA40 /* CGA monitor */ },
-	{ DCC_MONO, 			DCC_EGA80 /* CGA monitor */ },
-	{ DCC_MONO, 			DCC_EGA80 /* CGA emulation */ },	
-	{ DCC_MONO, 			DCC_EGA80 },
-	{ DCC_CGA40, 			DCC_EGAMONO },
-	{ DCC_CGA80, 			DCC_EGAMONO },
-	{ DCC_EGA40 /* CGA monitor */, 	DCC_MONO},
-	{ DCC_EGA80 /* CGA monitor */, 	DCC_MONO},
-	{ DCC_EGA80 /* CGA emulation */,DCC_MONO },	
-	{ DCC_EGA80, 			DCC_MONO },
-	{ DCC_EGAMONO, 			DCC_CGA40 },
-	{ DCC_EGAMONO, 			DCC_CGA40 },
-    };
-
-    if ((code < 0) || (code >= sizeof(dcc)/sizeof(dcc[0]))) {
-	adp[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
-	adp[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
-    } else {
-	adp[V_ADP_PRIMARY] = adapter_init_value[dcc[code].primary];
-	adp[V_ADP_SECONDARY] = adapter_init_value[dcc[code].secondary];
-    }
-}
-#endif /* VGA_NO_BIOS */
-
-static int
-verify_adapter(video_adapter_t *adp)
-{
-    volatile u_int16_t *buf;
-    u_int16_t v;
-    u_int32_t p;
-
-    buf = (u_int16_t *)BIOS_PADDRTOVADDR(adp->va_window);
-    v = readw(buf);
-    writew(buf, 0xA55A);
-    if (readw(buf) != 0xA55A)
-	return 1;
-    writew(buf, v);
-
-    switch (adp->va_type) {
-
-    case KD_EGA:
-	outb(adp->va_crtc_addr, 7);
-	if (inb(adp->va_crtc_addr) == 7) {
-	    adp->va_type = KD_VGA;
-	    adp->va_name = "vga";
-	    adp->va_flags |= V_ADP_STATESAVE | V_ADP_PALETTE;
-	}
-	adp->va_flags |= V_ADP_STATELOAD | V_ADP_BORDER;
-	/* the color adapter may be in the 40x25 mode... XXX */
-
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-	/* get the BIOS video mode pointer */
-	p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x4a8);
-	p = BIOS_SADDRTOLADDR(p);
-	if (ISMAPPED(p, sizeof(u_int32_t))) {
-	    p = *(u_int32_t *)BIOS_PADDRTOVADDR(p);
-	    p = BIOS_SADDRTOLADDR(p);
-	    if (ISMAPPED(p, V_MODE_PARAM_SIZE))
-		video_mode_ptr = (u_char *)BIOS_PADDRTOVADDR(p);
-	}
-#endif
-	break;
-
-    case KD_CGA:
-	adp->va_flags |= V_ADP_COLOR | V_ADP_BORDER;
-	/* may be in the 40x25 mode... XXX */
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-	/* get the BIOS video mode pointer */
-	p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
-	p = BIOS_SADDRTOLADDR(p);
-	video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
-#endif
-	break;
-
-    case KD_MONO:
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-	/* get the BIOS video mode pointer */
-	p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
-	p = BIOS_SADDRTOLADDR(p);
-	video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
-#endif
-	break;
-    }
-
-    return 0;
-}
-
-static void
-update_adapter_info(video_adapter_t *adp, video_info_t *info)
-{
-    adp->va_flags &= ~V_ADP_COLOR;
-    adp->va_flags |= 
-	(info->vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
-    adp->va_crtc_addr =
-	(adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
-    adp->va_window = BIOS_PADDRTOVADDR(info->vi_window);
-    adp->va_window_size = info->vi_window_size;
-    adp->va_window_gran = info->vi_window_gran;
-    if (info->vi_buffer_size == 0) {
-    	adp->va_buffer = 0;
-    	adp->va_buffer_size = 0;
-    } else {
-    	adp->va_buffer = BIOS_PADDRTOVADDR(info->vi_buffer);
-    	adp->va_buffer_size = info->vi_buffer_size;
-    }
-    if (info->vi_flags & V_INFO_GRAPHICS) {
-	switch (info->vi_depth/info->vi_planes) {
-	case 1:
-	    adp->va_line_width = info->vi_width/8;
-	    break;
-	case 2:
-	    adp->va_line_width = info->vi_width/4;
-	    break;
-	case 4:
-	    adp->va_line_width = info->vi_width/2;
-	    break;
-	case 8:
-	default: /* shouldn't happen */
-	    adp->va_line_width = info->vi_width;
-	    break;
-	}
-    } else {
-	adp->va_line_width = info->vi_width;
-    }
-    bcopy(info, &adp->va_info, sizeof(adp->va_info));
-}
-
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-/* compare two parameter table entries */
-static int 
-comp_adpregs(u_char *buf1, u_char *buf2)
-{
-    static struct {
-        u_char mask;
-    } params[V_MODE_PARAM_SIZE] = {
-	0xff, 0x00, 0xff, 		/* COLS, ROWS, POINTS */
-	0x00, 0x00, 			/* page length */
-	0xfe, 0xff, 0xff, 0xff,		/* sequencer registers */
-	0xf3,				/* misc register */
-	0xff, 0xff, 0xff, 0x7f, 0xff,	/* CRTC */
-	0xff, 0xff, 0xff, 0x7f, 0xff,
-	0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0xff, 0x7f, 0xff, 0xff,
-	0x7f, 0xff, 0xff, 0xef, 0xff,
-	0xff, 0xff, 0xff, 0xff, 0xff,	/* attribute controller registers */
-	0xff, 0xff, 0xff, 0xff, 0xff,
-	0xff, 0xff, 0xff, 0xff, 0xff,
-	0xff, 0xff, 0xff, 0xff, 0xf0,
-	0xff, 0xff, 0xff, 0xff, 0xff,	/* GDC register */
-	0xff, 0xff, 0xff, 0xff, 
-    }; 
-    int identical = TRUE;
-    int i;
-
-    if ((buf1 == NULL) || (buf2 == NULL))
-	return COMP_DIFFERENT;
-
-    for (i = 0; i < sizeof(params)/sizeof(params[0]); ++i) {
-	if (params[i].mask == 0)	/* don't care */
-	    continue;
-	if ((buf1[i] & params[i].mask) != (buf2[i] & params[i].mask))
-	    return COMP_DIFFERENT;
-	if (buf1[i] != buf2[i])
-	    identical = FALSE;
-    }
-    return (identical) ? COMP_IDENTICAL : COMP_SIMILAR;
-}
-#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
-
-/* probe video adapters and return the number of detected adapters */
-static int
-probe_adapters(void)
-{
-    video_adapter_t *adp;
-    video_info_t info;
-    u_char *mp;
-    int i;
-
-    /* do this test only once */
-    if (init_done)
-	return biosadapters;
-    init_done = TRUE;
-
-    /* 
-     * Locate display adapters. 
-     * The AT architecture supports upto two adapters. `syscons' allows
-     * the following combinations of adapters: 
-     *     1) MDA + CGA
-     *     2) MDA + EGA/VGA color 
-     *     3) CGA + EGA/VGA mono
-     * Note that `syscons' doesn't bother with MCGA as it is only
-     * avaiable for low end PS/2 models which has 80286 or earlier CPUs,
-     * thus, they are not running FreeBSD!
-     * When there are two adapaters in the system, one becomes `primary'
-     * and the other `secondary'. The EGA adapter has a set of DIP 
-     * switches on board for this information and the EGA BIOS copies 
-     * it in the BIOS data area BIOSDATA_VIDEOSWITCH (40:88). 
-     * The VGA BIOS has more sophisticated mechanism and has this 
-     * information in BIOSDATA_DCCINDEX (40:8a), but it also maintains 
-     * compatibility with the EGA BIOS by updating BIOSDATA_VIDEOSWITCH.
-     */
-
-    /* 
-     * Check rtc and BIOS data area.
-     * XXX: we don't use BIOSDATA_EQUIPMENT, since it is not a dead
-     * copy of RTC_EQUIPMENT.  Bits 4 and 5 of ETC_EQUIPMENT are
-     * zeros for EGA and VGA.  However, the EGA/VGA BIOS sets
-     * these bits in BIOSDATA_EQUIPMENT according to the monitor
-     * type detected.
-     */
-#ifndef VGA_NO_BIOS
-    switch ((rtcin(RTC_EQUIPMENT) >> 4) & 3) {	/* bit 4 and 5 */
-    case 0:
-	/* EGA/VGA */
-	fill_adapter_param(readb(BIOS_PADDRTOVADDR(0x488)) & 0x0f, 
-			   biosadapter);
-	break;
-    case 1:
-	/* CGA 40x25 */
-	/* FIXME: switch to the 80x25 mode? XXX */
-	biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA40];
-	biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
-	break;
-    case 2:
-	/* CGA 80x25 */
-	biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA80];
-	biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
-	break;
-    case 3:
-	/* MDA */
-	biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
-	biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
-	break;
-    }
-#else
-    /* assume EGA/VGA? XXX */
-    biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_EGA80];
-    biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
-#endif /* VGA_NO_BIOS */
-
-    biosadapters = 0;
-    if (verify_adapter(&biosadapter[V_ADP_SECONDARY]) == 0) {
-	++biosadapters;
-	biosadapter[V_ADP_SECONDARY].va_flags |= V_ADP_PROBED;
-	biosadapter[V_ADP_SECONDARY].va_mode = 
-	    biosadapter[V_ADP_SECONDARY].va_initial_mode =
-	    map_bios_mode_num(biosadapter[V_ADP_SECONDARY].va_type, 
-			      biosadapter[V_ADP_SECONDARY].va_flags
-				  & V_ADP_COLOR,
-			      biosadapter[V_ADP_SECONDARY].va_initial_bios_mode);
-    } else {
-	biosadapter[V_ADP_SECONDARY].va_type = -1;
-    }
-    if (verify_adapter(&biosadapter[V_ADP_PRIMARY]) == 0) {
-	++biosadapters;
-	biosadapter[V_ADP_PRIMARY].va_flags |= V_ADP_PROBED;
-#ifndef VGA_NO_BIOS
-	biosadapter[V_ADP_PRIMARY].va_initial_bios_mode = 
-	    readb(BIOS_PADDRTOVADDR(0x449));
-#else
-	biosadapter[V_ADP_PRIMARY].va_initial_bios_mode = 3;	/* XXX */
-#endif
-	biosadapter[V_ADP_PRIMARY].va_mode = 
-	    biosadapter[V_ADP_PRIMARY].va_initial_mode =
-	    map_bios_mode_num(biosadapter[V_ADP_PRIMARY].va_type, 
-			      biosadapter[V_ADP_PRIMARY].va_flags & V_ADP_COLOR,
-			      biosadapter[V_ADP_PRIMARY].va_initial_bios_mode);
-    } else {
-	biosadapter[V_ADP_PRIMARY] = biosadapter[V_ADP_SECONDARY];
-	biosadapter[V_ADP_SECONDARY].va_type = -1;
-    }
-    if (biosadapters == 0)
-	return biosadapters;
-    biosadapter[V_ADP_PRIMARY].va_unit = V_ADP_PRIMARY;
-    biosadapter[V_ADP_SECONDARY].va_unit = V_ADP_SECONDARY;
-
-#if 0 /* we don't need these... */
-    fb_init_struct(&biosadapter[V_ADP_PRIMARY], ...);
-    fb_init_struct(&biosadapter[V_ADP_SECONDARY], ...);
-#endif
-
-#if 0
-    /*
-     * We cannot have two video adapter of the same type; there must be
-     * only one of color or mono adapter, or one each of them.
-     */
-    if (biosadapters > 1) {
-	if (!((biosadapter[0].va_flags ^ biosadapter[1].va_flags)
-	      & V_ADP_COLOR))
-	    /* we have two mono or color adapters!! */
-	    return (biosadapters = 0);
-    }
-#endif
-
-    /*
-     * Ensure a zero start address.  This is mainly to recover after
-     * switching from pcvt using userconfig().  The registers are w/o
-     * for old hardware so it's too hard to relocate the active screen
-     * memory.
-     * This must be done before vga_save_state() for VGA.
-     */
-    outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 12);
-    outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
-    outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 13);
-    outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
-
-    /* the video mode parameter table in EGA/VGA BIOS */
-    /* NOTE: there can be only one EGA/VGA, wheather color or mono,
-     * recognized by the video BIOS.
-     */
-    if ((biosadapter[V_ADP_PRIMARY].va_type == KD_EGA) ||
-	(biosadapter[V_ADP_PRIMARY].va_type == KD_VGA)) {
-	adp = &biosadapter[V_ADP_PRIMARY];
-    } else if ((biosadapter[V_ADP_SECONDARY].va_type == KD_EGA) ||
-	       (biosadapter[V_ADP_SECONDARY].va_type == KD_VGA)) {
-	adp = &biosadapter[V_ADP_SECONDARY];
-    } else {
-	adp = NULL;
-    }
-    bzero(mode_map, sizeof(mode_map));
-    if (adp != NULL) {
-	if (adp->va_type == KD_VGA) {
-	    vga_save_state(adp, &adpstate, sizeof(adpstate));
-#if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
-	    mode_map[adp->va_initial_mode] = adpstate.regs;
-	    rows_offset = 1;
-#else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
-	    if (video_mode_ptr == NULL) {
-		mode_map[adp->va_initial_mode] = adpstate.regs;
-		rows_offset = 1;
-	    } else {
-		/* discard the table if we are not familiar with it... */
-		map_mode_table(mode_map, video_mode_ptr, M_VGA_CG320 + 1);
-		mp = get_mode_param(adp->va_initial_mode);
-		if (mp != NULL)
-		    bcopy(mp, adpstate2.regs, sizeof(adpstate2.regs));
-		switch (comp_adpregs(adpstate.regs, mp)) {
-		case COMP_IDENTICAL:
-		    /*
-		     * OK, this parameter table looks reasonably familiar
-		     * to us...
-		     */
-		    /* 
-		     * This is a kludge for Toshiba DynaBook SS433 
-		     * whose BIOS video mode table entry has the actual # 
-		     * of rows at the offset 1; BIOSes from other 
-		     * manufacturers store the # of rows - 1 there. XXX
-		     */
-		    rows_offset = adpstate.regs[1] + 1 - mp[1];
-		    break;
-
-		case COMP_SIMILAR:
-		    /*
-		     * Not exactly the same, but similar enough to be
-		     * trusted. However, use the saved register values
-		     * for the initial mode and other modes which are
-		     * based on the initial mode.
-		     */
-		    mode_map[adp->va_initial_mode] = adpstate.regs;
-		    rows_offset = adpstate.regs[1] + 1 - mp[1];
-		    adpstate.regs[1] -= rows_offset - 1;
-		    break;
-
-		case COMP_DIFFERENT:
-		default:
-		    /*
-		     * Don't use the paramter table in BIOS. It doesn't
-		     * look familiar to us. Video mode switching is allowed
-		     * only if the new mode is the same as or based on
-		     * the initial mode. 
-		     */
-		    video_mode_ptr = NULL;
-		    bzero(mode_map, sizeof(mode_map));
-		    mode_map[adp->va_initial_mode] = adpstate.regs;
-		    rows_offset = 1;
-		    break;
-		}
-	    }
-#endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
-
-#ifndef VGA_NO_MODE_CHANGE
-	    adp->va_flags |= V_ADP_MODECHANGE;
-#endif
-#ifndef VGA_NO_FONT_LOADING
-	    adp->va_flags |= V_ADP_FONT;
-#endif
-	} else if (adp->va_type == KD_EGA) {
-#if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
-	    rows_offset = 1;
-#else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
-	    if (video_mode_ptr == NULL) {
-		rows_offset = 1;
-	    } else {
-		map_mode_table(mode_map, video_mode_ptr, M_ENH_C80x25 + 1);
-		/* XXX how can one validate the EGA table... */
-		mp = get_mode_param(adp->va_initial_mode);
-		if (mp != NULL) {
-		    adp->va_flags |= V_ADP_MODECHANGE;
-#ifndef VGA_NO_FONT_LOADING
-		    adp->va_flags |= V_ADP_FONT;
-#endif
-		    rows_offset = 1;
-		} else {
-		    /*
-		     * This is serious. We will not be able to switch video
-		     * modes at all...
-		     */
-		    video_mode_ptr = NULL;
-		    bzero(mode_map, sizeof(mode_map));
-		    rows_offset = 1;
-                }
-	    }
-#endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
-	}
-    }
-
-    /* remove conflicting modes if we have more than one adapter */
-    if (biosadapters > 1) {
-	for (i = 0; i < biosadapters; ++i) {
-	    if (!(biosadapter[i].va_flags & V_ADP_MODECHANGE))
-		continue;
-	    clear_mode_map(&biosadapter[i], mode_map, M_VGA_CG320 + 1,
-			   (biosadapter[i].va_flags & V_ADP_COLOR) ? 
-			       V_INFO_COLOR : 0);
-	    if ((biosadapter[i].va_type == KD_VGA)
-		|| (biosadapter[i].va_type == KD_EGA)) {
-		biosadapter[i].va_io_base =
-		    (biosadapter[i].va_flags & V_ADP_COLOR) ?
-			IO_VGA : IO_MDA;
-		biosadapter[i].va_io_size = 32;
-	    }
-	}
-    }
-
-    /* buffer address */
-    vga_get_info(&biosadapter[V_ADP_PRIMARY],
-		 biosadapter[V_ADP_PRIMARY].va_initial_mode, &info);
-    update_adapter_info(&biosadapter[V_ADP_PRIMARY], &info);
-
-    if (biosadapters > 1) {
-	vga_get_info(&biosadapter[V_ADP_SECONDARY],
-		     biosadapter[V_ADP_SECONDARY].va_initial_mode, &info);
-	update_adapter_info(&biosadapter[V_ADP_SECONDARY], &info);
-    }
-
-    /*
-     * XXX: we should verify the following values for the primary adapter...
-     * crtc I/O port address: *(u_int16_t *)BIOS_PADDRTOVADDR(0x463);
-     * color/mono display: (*(u_int8_t *)BIOS_PADDRTOVADDR(0x487) & 0x02) 
-     *                     ? 0 : V_ADP_COLOR;
-     * columns: *(u_int8_t *)BIOS_PADDRTOVADDR(0x44a);
-     * rows: *(u_int8_t *)BIOS_PADDRTOVADDR(0x484);
-     * font size: *(u_int8_t *)BIOS_PADDRTOVADDR(0x485);
-     * buffer size: *(u_int16_t *)BIOS_PADDRTOVADDR(0x44c);
-     */
-
-    return biosadapters;
-}
-
-/* entry points */
-
-static int
-vga_nop(void)
-{
-    return 0;
-}
-
-static int
-vga_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
-{
-    probe_adapters();
-    if (unit >= biosadapters)
-	return ENXIO;
-
-    *adpp = &biosadapter[unit];
-
-    return 0;
-}
-
-static int
-vga_init(int unit, video_adapter_t *adp, int flags)
-{
-    if ((unit >= biosadapters) || (adp == NULL) || !probe_done(adp))
-	return ENXIO;
-
-    if (!init_done(adp)) {
-	/* nothing to do really... */
-	adp->va_flags |= V_ADP_INITIALIZED;
-    }
-
-    if (!config_done(adp)) {
-	if (vid_register(adp) < 0)
-		return ENXIO;
-	adp->va_flags |= V_ADP_REGISTERED;
-    }
-    if (vga_sub_configure != NULL)
-	(*vga_sub_configure)(0);
-
-    return 0;
-}
-
-/*
- * get_info():
- * Return the video_info structure of the requested video mode.
- *
- * all adapters
- */
-static int
-vga_get_info(video_adapter_t *adp, int mode, video_info_t *info)
-{
-    int i;
-
-    if (!init_done)
-	return 1;
-
-    mode = map_gen_mode_num(adp->va_type, adp->va_flags & V_ADP_COLOR, mode);
-#ifndef VGA_NO_MODE_CHANGE
-    if (adp->va_flags & V_ADP_MODECHANGE) {
-	/*
-	 * If the parameter table entry for this mode is not found, 
-	 * the mode is not supported...
-	 */
-	if (get_mode_param(mode) == NULL)
-	    return 1;
-    } else
-#endif /* VGA_NO_MODE_CHANGE */
-    {
-	/* 
-	 * Even if we don't support video mode switching on this adapter,
-	 * the information on the initial (thus current) video mode 
-	 * should be made available.
-	 */
-	if (mode != adp->va_initial_mode)
-	    return 1;
-    }
-
-    for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
-	if (bios_vmode[i].vi_mode == NA)
-	    continue;
-	if (mode == bios_vmode[i].vi_mode) {
-	    *info = bios_vmode[i];
-	    return 0;
-	}
-    }
-    return 1;
-}
-
-/*
- * query_mode():
- * Find a video mode matching the requested parameters.
- * Fields filled with 0 are considered "don't care" fields and
- * match any modes.
- *
- * all adapters
- */
-static int
-vga_query_mode(video_adapter_t *adp, video_info_t *info)
-{
-    video_info_t buf;
-    int i;
-
-    if (!init_done)
-	return -1;
-
-    for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
-	if (bios_vmode[i].vi_mode == NA)
-	    continue;
-
-	if ((info->vi_width != 0)
-	    && (info->vi_width != bios_vmode[i].vi_width))
-		continue;
-	if ((info->vi_height != 0)
-	    && (info->vi_height != bios_vmode[i].vi_height))
-		continue;
-	if ((info->vi_cwidth != 0)
-	    && (info->vi_cwidth != bios_vmode[i].vi_cwidth))
-		continue;
-	if ((info->vi_cheight != 0)
-	    && (info->vi_cheight != bios_vmode[i].vi_cheight))
-		continue;
-	if ((info->vi_depth != 0)
-	    && (info->vi_depth != bios_vmode[i].vi_depth))
-		continue;
-	if ((info->vi_planes != 0)
-	    && (info->vi_planes != bios_vmode[i].vi_planes))
-		continue;
-	/* XXX: should check pixel format, memory model */
-	if ((info->vi_flags != 0)
-	    && (info->vi_flags != bios_vmode[i].vi_flags))
-		continue;
-
-	/* verify if this mode is supported on this adapter */
-	if (vga_get_info(adp, bios_vmode[i].vi_mode, &buf))
-		continue;
-	return bios_vmode[i].vi_mode;
-    }
-    return -1;
-}
-
-/*
- * set_mode():
- * Change the video mode.
- *
- * EGA/VGA
- */
-static int
-vga_set_mode(video_adapter_t *adp, int mode)
-{
-#ifndef VGA_NO_MODE_CHANGE
-    video_info_t info;
-    adp_state_t params;
-
-    prologue(adp, V_ADP_MODECHANGE, 1);
-
-    mode = map_gen_mode_num(adp->va_type, 
-			    adp->va_flags & V_ADP_COLOR, mode);
-    if (vga_get_info(adp, mode, &info))
-	return 1;
-    params.sig = V_STATE_SIG;
-    bcopy(get_mode_param(mode), params.regs, sizeof(params.regs));
-
-    switch (mode) {
-    case M_VGA_C80x60: case M_VGA_M80x60:
-	params.regs[2]  = 0x08;
-	params.regs[19] = 0x47;
-	goto special_480l;
-
-    case M_VGA_C80x30: case M_VGA_M80x30:
-	params.regs[19] = 0x4f;
-special_480l:
-	params.regs[9] |= 0xc0;
-	params.regs[16] = 0x08;
-	params.regs[17] = 0x3e;
-	params.regs[26] = 0xea;
-	params.regs[28] = 0xdf;
-	params.regs[31] = 0xe7;
-	params.regs[32] = 0x04;
-	goto setup_mode;
-
-    case M_ENH_C80x43: case M_ENH_B80x43:
-	params.regs[28] = 87;
-	goto special_80x50;
-
-    case M_VGA_C80x50: case M_VGA_M80x50:
-special_80x50:
-	params.regs[2] = 8;
-	params.regs[19] = 7;
-	goto setup_mode;
-
-    case M_VGA_C40x25: case M_VGA_C80x25:
-    case M_VGA_M80x25:
-    case M_B40x25:     case M_C40x25:
-    case M_B80x25:     case M_C80x25:
-    case M_ENH_B40x25: case M_ENH_C40x25:
-    case M_ENH_B80x25: case M_ENH_C80x25:
-    case M_EGAMONO80x25:
-
-setup_mode:
-	vga_load_state(adp, &params);
-	break;
-
-    case M_VGA_MODEX:
-	/* "unchain" the VGA mode */
-	params.regs[5-1+0x04] &= 0xf7;
-	params.regs[5-1+0x04] |= 0x04;
-	/* turn off doubleword mode */
-	params.regs[10+0x14] &= 0xbf;
-	/* turn off word adressing */
-	params.regs[10+0x17] |= 0x40;
-	/* set logical screen width */
-	params.regs[10+0x13] = 80;
-	/* set 240 lines */
-	params.regs[10+0x11] = 0x2c;
-	params.regs[10+0x06] = 0x0d;
-	params.regs[10+0x07] = 0x3e;
-	params.regs[10+0x10] = 0xea;
-	params.regs[10+0x11] = 0xac;
-	params.regs[10+0x12] = 0xdf;
-	params.regs[10+0x15] = 0xe7;
-	params.regs[10+0x16] = 0x06;
-	/* set vertical sync polarity to reflect aspect ratio */
-	params.regs[9] = 0xe3;
-	goto setup_grmode;
-
-    case M_BG320:     case M_CG320:     case M_BG640:
-    case M_CG320_D:   case M_CG640_E:
-    case M_CG640x350: case M_ENH_CG640:
-    case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
-
-setup_grmode:
-	vga_load_state(adp, &params);
-	break;
-
-    default:
-	return 1;
-    }
-
-    adp->va_mode = mode;
-    update_adapter_info(adp, &info);
-
-    /* move hardware cursor out of the way */
-    (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
-
-    return 0;
-#else /* VGA_NO_MODE_CHANGE */
-    return 1;
-#endif /* VGA_NO_MODE_CHANGE */
-}
-
-#ifndef VGA_NO_FONT_LOADING
-
-static void
-set_font_mode(video_adapter_t *adp, u_char *buf)
-{
-    u_char *mp;
-    int s;
-
-    s = splhigh();
-
-    /* save register values */
-    if (adp->va_type == KD_VGA) {
-	outb(TSIDX, 0x02); buf[0] = inb(TSREG);
-	outb(TSIDX, 0x04); buf[1] = inb(TSREG);
-	outb(GDCIDX, 0x04); buf[2] = inb(GDCREG);
-	outb(GDCIDX, 0x05); buf[3] = inb(GDCREG);
-	outb(GDCIDX, 0x06); buf[4] = inb(GDCREG);
-	inb(adp->va_crtc_addr + 6);
-	outb(ATC, 0x10); buf[5] = inb(ATC + 1);
-    } else /* if (adp->va_type == KD_EGA) */ {
-	/* 
-	 * EGA cannot be read; copy parameters from the mode parameter 
-	 * table. 
-	 */
-	mp = get_mode_param(adp->va_mode);
-	buf[0] = mp[5 + 0x02 - 1];
-	buf[1] = mp[5 + 0x04 - 1];
-	buf[2] = mp[55 + 0x04];
-	buf[3] = mp[55 + 0x05];
-	buf[4] = mp[55 + 0x06];
-	buf[5] = mp[35 + 0x10];
-    }
-
-    /* setup vga for loading fonts */
-    inb(adp->va_crtc_addr + 6);			/* reset flip-flop */
-    outb(ATC, 0x10); outb(ATC, buf[5] & ~0x01);
-    inb(adp->va_crtc_addr + 6);			/* reset flip-flop */
-    outb(ATC, 0x20);				/* enable palette */
-
-#if VGA_SLOW_IOACCESS
-#ifdef VGA_ALT_SEQACCESS
-    outb(TSIDX, 0x00); outb(TSREG, 0x01);
-#endif
-    outb(TSIDX, 0x02); outb(TSREG, 0x04);
-    outb(TSIDX, 0x04); outb(TSREG, 0x07);
-#ifdef VGA_ALT_SEQACCESS
-    outb(TSIDX, 0x00); outb(TSREG, 0x03);
-#endif
-    outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
-    outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
-    outb(GDCIDX, 0x06); outb(GDCREG, 0x04);
-#else /* VGA_SLOW_IOACCESS */
-#ifdef VGA_ALT_SEQACCESS
-    outw(TSIDX, 0x0100);
-#endif
-    outw(TSIDX, 0x0402);
-    outw(TSIDX, 0x0704);
-#ifdef VGA_ALT_SEQACCESS
-    outw(TSIDX, 0x0300);
-#endif
-    outw(GDCIDX, 0x0204);
-    outw(GDCIDX, 0x0005);
-    outw(GDCIDX, 0x0406);               /* addr = a0000, 64kb */
-#endif /* VGA_SLOW_IOACCESS */
-
-    splx(s);
-}
-
-static void
-set_normal_mode(video_adapter_t *adp, u_char *buf)
-{
-    int s;
-
-    s = splhigh();
-
-    /* setup vga for normal operation mode again */
-    inb(adp->va_crtc_addr + 6);			/* reset flip-flop */
-    outb(ATC, 0x10); outb(ATC, buf[5]);
-    inb(adp->va_crtc_addr + 6);			/* reset flip-flop */
-    outb(ATC, 0x20);				/* enable palette */
-
-#if VGA_SLOW_IOACCESS
-#ifdef VGA_ALT_SEQACCESS
-    outb(TSIDX, 0x00); outb(TSREG, 0x01);
-#endif
-    outb(TSIDX, 0x02); outb(TSREG, buf[0]);
-    outb(TSIDX, 0x04); outb(TSREG, buf[1]);
-#ifdef VGA_ALT_SEQACCESS
-    outb(TSIDX, 0x00); outb(TSREG, 0x03);
-#endif
-    outb(GDCIDX, 0x04); outb(GDCREG, buf[2]);
-    outb(GDCIDX, 0x05); outb(GDCREG, buf[3]);
-    if (adp->va_crtc_addr == MONO_CRTC) {
-	outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x08);
-    } else {
-	outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x0c);
-    }
-#else /* VGA_SLOW_IOACCESS */
-#ifdef VGA_ALT_SEQACCESS
-    outw(TSIDX, 0x0100);
-#endif
-    outw(TSIDX, 0x0002 | (buf[0] << 8));
-    outw(TSIDX, 0x0004 | (buf[1] << 8));
-#ifdef VGA_ALT_SEQACCESS
-    outw(TSIDX, 0x0300);
-#endif
-    outw(GDCIDX, 0x0004 | (buf[2] << 8));
-    outw(GDCIDX, 0x0005 | (buf[3] << 8));
-    if (adp->va_crtc_addr == MONO_CRTC)
-        outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x08)<<8));
-    else
-        outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x0c)<<8));
-#endif /* VGA_SLOW_IOACCESS */
-
-    splx(s);
-}
-
-#endif /* VGA_NO_FONT_LOADING */
-
-/*
- * save_font():
- * Read the font data in the requested font page from the video adapter.
- *
- * EGA/VGA
- */
-static int
-vga_save_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
-	      int ch, int count)
-{
-#ifndef VGA_NO_FONT_LOADING
-    u_char buf[PARAM_BUFSIZE];
-    u_int32_t segment;
-    int c;
-#ifdef VGA_ALT_SEQACCESS
-    int s;
-    u_char val = 0;
-#endif
-
-    prologue(adp, V_ADP_FONT, 1);
-
-    if (fontsize < 14) {
-	/* FONT_8 */
-	fontsize = 8;
-    } else if (fontsize >= 32) {
-	fontsize = 32;
-    } else if (fontsize >= 16) {
-	/* FONT_16 */
-	fontsize = 16;
-    } else {
-	/* FONT_14 */
-	fontsize = 14;
-    }
-
-    if (page < 0 || page >= 8)
-	return 1;
-    segment = FONT_BUF + 0x4000*page;
-    if (page > 3)
-	segment -= 0xe000;
-
-#ifdef VGA_ALT_SEQACCESS
-    if (adp->va_type == KD_VGA) {	/* what about EGA? XXX */
-	s = splhigh();
-	outb(TSIDX, 0x00); outb(TSREG, 0x01);
-	outb(TSIDX, 0x01); val = inb(TSREG);	/* disable screen */
-	outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
-	outb(TSIDX, 0x00); outb(TSREG, 0x03);
-	splx(s);
-    }
-#endif
-
-    set_font_mode(adp, buf);
-    if (fontsize == 32) {
-	bcopy_fromio((void *)(segment + ch*32), data, fontsize*count);
-    } else {
-	for (c = ch; count > 0; ++c, --count) {
-	    bcopy_fromio((void *)(segment + c*32), data, fontsize);
-	    data += fontsize;
-	}
-    }
-    set_normal_mode(adp, buf);
-
-#ifdef VGA_ALT_SEQACCESS
-    if (adp->va_type == KD_VGA) {
-	s = splhigh();
-	outb(TSIDX, 0x00); outb(TSREG, 0x01);
-	outb(TSIDX, 0x01); outb(TSREG, val & 0xdf);	/* enable screen */
-	outb(TSIDX, 0x00); outb(TSREG, 0x03);
-	splx(s);
-    }
-#endif
-
-    return 0;
-#else /* VGA_NO_FONT_LOADING */
-    return 1;
-#endif /* VGA_NO_FONT_LOADING */
-}
-
-/*
- * load_font():
- * Set the font data in the requested font page.
- * NOTE: it appears that some recent video adapters do not support
- * the font page other than 0... XXX
- *
- * EGA/VGA
- */
-static int
-vga_load_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
-	      int ch, int count)
-{
-#ifndef VGA_NO_FONT_LOADING
-    u_char buf[PARAM_BUFSIZE];
-    u_int32_t segment;
-    int c;
-#ifdef VGA_ALT_SEQACCESS
-    int s;
-    u_char val = 0;
-#endif
-
-    prologue(adp, V_ADP_FONT, 1);
-
-    if (fontsize < 14) {
-	/* FONT_8 */
-	fontsize = 8;
-    } else if (fontsize >= 32) {
-	fontsize = 32;
-    } else if (fontsize >= 16) {
-	/* FONT_16 */
-	fontsize = 16;
-    } else {
-	/* FONT_14 */
-	fontsize = 14;
-    }
-
-    if (page < 0 || page >= 8)
-	return 1;
-    segment = FONT_BUF + 0x4000*page;
-    if (page > 3)
-	segment -= 0xe000;
-
-#ifdef VGA_ALT_SEQACCESS
-    if (adp->va_type == KD_VGA) {	/* what about EGA? XXX */
-	s = splhigh();
-	outb(TSIDX, 0x00); outb(TSREG, 0x01);
-	outb(TSIDX, 0x01); val = inb(TSREG);	/* disable screen */
-	outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
-	outb(TSIDX, 0x00); outb(TSREG, 0x03);
-	splx(s);
-    }
-#endif
-
-    set_font_mode(adp, buf);
-    if (fontsize == 32) {
-	bcopy_toio(data, (void *)(segment + ch*32), fontsize*count);
-    } else {
-	for (c = ch; count > 0; ++c, --count) {
-	    bcopy_toio(data, (void *)(segment + c*32), fontsize);
-	    data += fontsize;
-	}
-    }
-    set_normal_mode(adp, buf);
-
-#ifdef VGA_ALT_SEQACCESS
-    if (adp->va_type == KD_VGA) {
-	s = splhigh();
-	outb(TSIDX, 0x00); outb(TSREG, 0x01);
-	outb(TSIDX, 0x01); outb(TSREG, val & 0xdf);	/* enable screen */
-	outb(TSIDX, 0x00); outb(TSREG, 0x03);
-	splx(s);
-    }
-#endif
-
-    return 0;
-#else /* VGA_NO_FONT_LOADING */
-    return 1;
-#endif /* VGA_NO_FONT_LOADING */
-}
-
-/*
- * show_font():
- * Activate the requested font page.
- * NOTE: it appears that some recent video adapters do not support
- * the font page other than 0... XXX
- *
- * EGA/VGA
- */
-static int
-vga_show_font(video_adapter_t *adp, int page)
-{
-#ifndef VGA_NO_FONT_LOADING
-    static u_char cg[] = { 0x00, 0x05, 0x0a, 0x0f, 0x30, 0x35, 0x3a, 0x3f };
-    int s;
-
-    prologue(adp, V_ADP_FONT, 1);
-    if (page < 0 || page >= 8)
-	return 1;
-
-    s = splhigh();
-    outb(TSIDX, 0x03); outb(TSREG, cg[page]);
-    splx(s);
-
-    return 0;
-#else /* VGA_NO_FONT_LOADING */
-    return 1;
-#endif /* VGA_NO_FONT_LOADING */
-}
-
-/*
- * save_palette():
- * Read DAC values. The values have expressed in 8 bits.
- *
- * VGA
- */
-static int
-vga_save_palette(video_adapter_t *adp, u_char *palette)
-{
-    int i;
-
-    prologue(adp, V_ADP_PALETTE, 1);
-
-    /* 
-     * We store 8 bit values in the palette buffer, while the standard
-     * VGA has 6 bit DAC .
-     */
-    outb(PALRADR, 0x00);
-    for (i = 0; i < 256*3; ++i)
-	palette[i] = inb(PALDATA) << 2; 
-    inb(adp->va_crtc_addr + 6);	/* reset flip/flop */
-    return 0;
-}
-
-/*
- * load_palette():
- * Set DAC values.
- *
- * VGA
- */
-static int
-vga_load_palette(video_adapter_t *adp, u_char *palette)
-{
-    int i;
-
-    prologue(adp, V_ADP_PALETTE, 1);
-
-    outb(PIXMASK, 0xff);		/* no pixelmask */
-    outb(PALWADR, 0x00);
-    for (i = 0; i < 256*3; ++i)
-	outb(PALDATA, palette[i] >> 2);
-    inb(adp->va_crtc_addr + 6);	/* reset flip/flop */
-    outb(ATC, 0x20);			/* enable palette */
-    return 0;
-}
-
-/*
- * set_border():
- * Change the border color.
- *
- * CGA/EGA/VGA
- */
-static int
-vga_set_border(video_adapter_t *adp, int color)
-{
-    prologue(adp, V_ADP_BORDER, 1);
-
-    switch (adp->va_type) {
-    case KD_EGA:
-    case KD_VGA:    
-	inb(adp->va_crtc_addr + 6);	/* reset flip-flop */
-	outb(ATC, 0x31); outb(ATC, color & 0xff); 
-	break;  
-    case KD_CGA:    
-	outb(adp->va_crtc_addr + 5, color & 0x0f); /* color select register */
-	break;  
-    case KD_MONO:   
-    case KD_HERCULES:
-    default:
-	break;  
-    }
-    return 0;
-}
-
-/*
- * save_state():
- * Read video register values.
- * NOTE: this function only reads the standard EGA/VGA registers.
- * any extra/extended registers of SVGA adapters are not saved.
- *
- * VGA
- */
-static int
-vga_save_state(video_adapter_t *adp, void *p, size_t size)
-{
-    video_info_t info;
-    u_char *buf;
-    int crtc_addr;
-    int i, j;
-    int s;
-
-    if (size == 0) {
-	/* return the required buffer size */
-	prologue(adp, V_ADP_STATESAVE, 0);
-	return sizeof(adp_state_t);
-    } else {
-	prologue(adp, V_ADP_STATESAVE, 1);
-	if (size < sizeof(adp_state_t))
-	    return 1;
-    }
-
-    ((adp_state_t *)p)->sig = V_STATE_SIG;
-    buf = ((adp_state_t *)p)->regs;
-    bzero(buf, V_MODE_PARAM_SIZE);
-    crtc_addr = adp->va_crtc_addr;
-
-    s = splhigh();
-
-    outb(TSIDX, 0x00); outb(TSREG, 0x01);	/* stop sequencer */
-    for (i = 0, j = 5; i < 4; i++) {           
-	outb(TSIDX, i + 1);
-	buf[j++]  =  inb(TSREG);
-    }
-    buf[9]  =  inb(MISC + 10);			/* dot-clock */
-    outb(TSIDX, 0x00); outb(TSREG, 0x03);	/* start sequencer */
-
-    for (i = 0, j = 10; i < 25; i++) {		/* crtc */
-	outb(crtc_addr, i);
-	buf[j++]  =  inb(crtc_addr + 1);
-    }
-    for (i = 0, j = 35; i < 20; i++) {		/* attribute ctrl */
-        inb(crtc_addr + 6);			/* reset flip-flop */
-	outb(ATC, i);
-	buf[j++]  =  inb(ATC + 1);
-    }
-    for (i = 0, j = 55; i < 9; i++) {		/* graph data ctrl */
-	outb(GDCIDX, i);
-	buf[j++]  =  inb(GDCREG);
-    }
-    inb(crtc_addr + 6);				/* reset flip-flop */
-    outb(ATC, 0x20);				/* enable palette */
-
-    splx(s);
-
-#if 1
-    if (vga_get_info(adp, adp->va_mode, &info) == 0) {
-	if (info.vi_flags & V_INFO_GRAPHICS) {
-	    buf[0] = info.vi_width/info.vi_cwidth; /* COLS */
-	    buf[1] = info.vi_height/info.vi_cheight - 1; /* ROWS */
-	} else {
-	    buf[0] = info.vi_width;		/* COLS */
-	    buf[1] = info.vi_height - 1;	/* ROWS */
-	}
-	buf[2] = info.vi_cheight;		/* POINTS */
-    } else {
-	/* XXX: shouldn't be happening... */
-	printf("vga%d: %s: failed to obtain mode info. (vga_save_state())\n",
-	       adp->va_unit, adp->va_name);
-    }
-#else
-    buf[0] = readb(BIOS_PADDRTOVADDR(0x44a));	/* COLS */
-    buf[1] = readb(BIOS_PADDRTOVADDR(0x484));	/* ROWS */
-    buf[2] = readb(BIOS_PADDRTOVADDR(0x485));	/* POINTS */
-    buf[3] = readb(BIOS_PADDRTOVADDR(0x44c));
-    buf[4] = readb(BIOS_PADDRTOVADDR(0x44d));
-#endif
-
-    return 0;
-}
-
-/*
- * load_state():
- * Set video registers at once.
- * NOTE: this function only updates the standard EGA/VGA registers.
- * any extra/extended registers of SVGA adapters are not changed.
- *
- * EGA/VGA
- */
-static int
-vga_load_state(video_adapter_t *adp, void *p)
-{
-    u_char *buf;
-    int crtc_addr;
-    int s;
-    int i;
-
-    prologue(adp, V_ADP_STATELOAD, 1);
-    if (((adp_state_t *)p)->sig != V_STATE_SIG)
-	return 1;
-
-    buf = ((adp_state_t *)p)->regs;
-    crtc_addr = adp->va_crtc_addr;
-
-    s = splhigh();
-
-    outb(TSIDX, 0x00); outb(TSREG, 0x01);	/* stop sequencer */
-    for (i = 0; i < 4; ++i) {			/* program sequencer */
-	outb(TSIDX, i + 1);
-	outb(TSREG, buf[i + 5]);
-    }
-    outb(MISC, buf[9]);				/* set dot-clock */
-    outb(TSIDX, 0x00); outb(TSREG, 0x03);	/* start sequencer */
-    outb(crtc_addr, 0x11);
-    outb(crtc_addr + 1, inb(crtc_addr + 1) & 0x7F);
-    for (i = 0; i < 25; ++i) {			/* program crtc */
-	outb(crtc_addr, i);
-	outb(crtc_addr + 1, buf[i + 10]);
-    }
-    inb(crtc_addr+6);				/* reset flip-flop */
-    for (i = 0; i < 20; ++i) {			/* program attribute ctrl */
-	outb(ATC, i);
-	outb(ATC, buf[i + 35]);
-    }
-    for (i = 0; i < 9; ++i) {			/* program graph data ctrl */
-	outb(GDCIDX, i);
-	outb(GDCREG, buf[i + 55]);
-    }
-    inb(crtc_addr + 6);				/* reset flip-flop */
-    outb(ATC, 0x20);				/* enable palette */
-
-#if notyet /* a temporary workaround for kernel panic, XXX */
-#ifndef VGA_NO_BIOS
-    if (adp->va_unit == V_ADP_PRIMARY) {
-	writeb(BIOS_PADDRTOVADDR(0x44a), buf[0]);	/* COLS */
-	writeb(BIOS_PADDRTOVADDR(0x484), buf[1] + rows_offset - 1); /* ROWS */
-	writeb(BIOS_PADDRTOVADDR(0x485), buf[2]);	/* POINTS */
-#if 0
-	writeb(BIOS_PADDRTOVADDR(0x44c), buf[3]);
-	writeb(BIOS_PADDRTOVADDR(0x44d), buf[4]);
-#endif
-    }
-#endif /* VGA_NO_BIOS */
-#endif /* notyet */
-
-    splx(s);
-    return 0;
-}
-
-/*
- * set_origin():
- * Change the origin (window mapping) of the banked frame buffer.
- */
-static int
-vga_set_origin(video_adapter_t *adp, off_t offset)
-{
-    /* 
-     * The standard video modes do not require window mapping; 
-     * always return error.
-     */
-    return 1;
-}
-
-/*
- * read_hw_cursor():
- * Read the position of the hardware text cursor.
- *
- * all adapters
- */
-static int
-vga_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
-{
-    u_int16_t off;
-    int s;
-
-    if (!init_done)
-	return 1;
-
-    if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
-	return 1;
-
-    s = spltty();
-    outb(adp->va_crtc_addr, 14);
-    off = inb(adp->va_crtc_addr + 1);
-    outb(adp->va_crtc_addr, 15);
-    off = (off << 8) | inb(adp->va_crtc_addr + 1);
-    splx(s);
-
-    *row = off / adp->va_info.vi_width;
-    *col = off % adp->va_info.vi_width;
-
-    return 0;
-}
-
-/*
- * set_hw_cursor():
- * Move the hardware text cursor.  If col and row are both -1, 
- * the cursor won't be shown.
- *
- * all adapters
- */
-static int
-vga_set_hw_cursor(video_adapter_t *adp, int col, int row)
-{
-    u_int16_t off;
-    int s;
-
-    if (!init_done)
-	return 1;
-
-    if ((col == -1) && (row == -1)) {
-	off = -1;
-    } else {
-	if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
-	    return 1;
-	off = row*adp->va_info.vi_width + col;
-    }
-
-    s = spltty();
-    outb(adp->va_crtc_addr, 14);
-    outb(adp->va_crtc_addr + 1, off >> 8);
-    outb(adp->va_crtc_addr, 15);
-    outb(adp->va_crtc_addr + 1, off & 0x00ff);
-    splx(s);
-
-    return 0;
-}
-
-/*
- * set_hw_cursor_shape():
- * Change the shape of the hardware text cursor. If the height is
- * zero or negative, the cursor won't be shown.
- *
- * all adapters
- */
-static int
-vga_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
-			int celsize, int blink)
-{
-    int s;
-
-    if (!init_done)
-	return 1;
-
-    s = spltty();
-    switch (adp->va_type) {
-    case KD_VGA:
-    case KD_CGA:
-    case KD_MONO:
-    case KD_HERCULES:
-    default:
-	if (height <= 0) {
-	    /* make the cursor invisible */
-	    outb(adp->va_crtc_addr, 10);
-	    outb(adp->va_crtc_addr + 1, 32);
-	    outb(adp->va_crtc_addr, 11);
-	    outb(adp->va_crtc_addr + 1, 0);
-	} else {
-	    outb(adp->va_crtc_addr, 10);
-	    outb(adp->va_crtc_addr + 1, celsize - base - height);
-	    outb(adp->va_crtc_addr, 11);
-	    outb(adp->va_crtc_addr + 1, celsize - base - 1);
-	}
-	break;
-    case KD_EGA:
-	if (height <= 0) {
-	    /* make the cursor invisible */
-	    outb(adp->va_crtc_addr, 10);
-	    outb(adp->va_crtc_addr + 1, celsize);
-	    outb(adp->va_crtc_addr, 11);
-	    outb(adp->va_crtc_addr + 1, 0);
-	} else {
-	    outb(adp->va_crtc_addr, 10);
-	    outb(adp->va_crtc_addr + 1, celsize - base - height);
-	    outb(adp->va_crtc_addr, 11);
-	    outb(adp->va_crtc_addr + 1, celsize - base);
-	}
-	break;
-    }
-    splx(s);
-
-    return 0;
-}
-
-/*
- * mmap():
- * Mmap frame buffer.
- *
- * all adapters
- */
-static int
-vga_mmap(video_adapter_t *adp, vm_offset_t offset)
-{
-    if (offset > 0x20000 - PAGE_SIZE)
-	return -1;
-#ifdef __i386__
-    return i386_btop((VIDEO_BUF_BASE + offset));
-#endif
-#ifdef __alpha__
-    return alpha_btop((VIDEO_BUF_BASE + offset));
-#endif
-}
-
-static void
-dump_buffer(u_char *buf, size_t len)
-{
-    int i;
-
-    for(i = 0; i < len;) {
-	printf("%02x ", buf[i]);
-	if ((++i % 16) == 0)
-	    printf("\n");
-    }
-}
-
-/*
- * diag():
- * Print some information about the video adapter and video modes,
- * with requested level of details.
- *
- * all adapters
- */
-static int
-vga_diag(video_adapter_t *adp, int level)
-{
-#if FB_DEBUG > 1
-    video_info_t info;
-#endif
-    u_char *mp;
-
-    if (!init_done)
-	return 1;
-
-#if FB_DEBUG > 1
-#ifndef VGA_NO_BIOS
-    printf("vga: RTC equip. code:0x%02x, DCC code:0x%02x\n",
-	   rtcin(RTC_EQUIPMENT), readb(BIOS_PADDRTOVADDR(0x488)));
-    printf("vga: CRTC:0x%x, video option:0x%02x, ",
-	   readw(BIOS_PADDRTOVADDR(0x463)),
-	   readb(BIOS_PADDRTOVADDR(0x487)));
-    printf("rows:%d, cols:%d, font height:%d\n",
-	   readb(BIOS_PADDRTOVADDR(0x44a)),
-	   readb(BIOS_PADDRTOVADDR(0x484)) + 1,
-	   readb(BIOS_PADDRTOVADDR(0x485)));
-#endif /* VGA_NO_BIOS */
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-    printf("vga: param table EGA/VGA:%p", video_mode_ptr);
-    printf(", CGA/MDA:%p\n", video_mode_ptr2);
-#endif
-    printf("vga: rows_offset:%d\n", rows_offset);
-#endif /* FB_DEBUG > 1 */
-
-    fb_dump_adp_info(DRIVER_NAME, adp, level);
-
-#if FB_DEBUG > 1
-    if (adp->va_flags & V_ADP_MODECHANGE) {
-	for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
-	    if (bios_vmode[i].vi_mode == NA)
-		continue;
-	    if (get_mode_param(bios_vmode[i].vi_mode) == NULL)
-		continue;
-	    fb_dump_mode_info(DRIVER_NAME, adp, &bios_vmode[i], level);
-	}
-    } else {
-	vga_get_info(adp, adp->va_initial_mode, &info);	/* shouldn't fail */
-	fb_dump_mode_info(DRIVER_NAME, adp, &info, level);
-    }
-#endif /* FB_DEBUG > 1 */
-
-    if ((adp->va_type != KD_EGA) && (adp->va_type != KD_VGA))
-	return 0;
-#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
-    if (video_mode_ptr == NULL)
-	printf("vga%d: %s: WARNING: video mode switching is not "
-	       "fully supported on this adapter\n",
-	       adp->va_unit, adp->va_name);
-#endif
-    if (level <= 0)
-	return 0;
-
-    if (adp->va_type == KD_VGA) {
-	printf("VGA parameters upon power-up\n");
-	dump_buffer(adpstate.regs, sizeof(adpstate.regs));
-	printf("VGA parameters in BIOS for mode %d\n", adp->va_initial_mode);
-	dump_buffer(adpstate2.regs, sizeof(adpstate2.regs));
-    }
-
-    mp = get_mode_param(adp->va_initial_mode);
-    if (mp == NULL)	/* this shouldn't be happening */
-	return 0;
-    printf("EGA/VGA parameters to be used for mode %d\n", adp->va_initial_mode);
-    dump_buffer(mp, V_MODE_PARAM_SIZE);
-
-    return 0;
-}
-
-#endif /* NVGA > 0 */