Copy the following files to new places, a subsequent commit would remove

them from the old place.  This commit necessary so that the tree would not
enter a broken state.

	sys/i386/isa/vesa.c -> dev/fb/vesa.c
	sys/i386/include/pc/vesa.h -> dev/fb/vesa.h
	sys/i386/isa/dpms.c -> dev/dpms/dpms.c

1 files changed, 1696 insertions, 0 deletions

diff --git a/sys/dev/fb/vesa.c b/sys/dev/fb/vesa.c
new file mode 100644
index 0000000..736daff
--- /dev/null
+++ b/sys/dev/fb/vesa.c
@@ -0,0 +1,1696 @@
+/*-
+ * Copyright (c) 1998 Kazutaka YOKOTA and Michael Smith
+ * 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.
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "opt_vga.h"
+#include "opt_vesa.h"
+
+#ifndef VGA_NO_MODE_CHANGE
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/fbio.h>
+
+#include <vm/vm.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_param.h>
+#include <vm/pmap.h>
+
+#include <machine/md_var.h>
+#include <machine/vm86.h>
+#include <machine/pc/bios.h>
+#include <machine/pc/vesa.h>
+
+#include <dev/fb/fbreg.h>
+#include <dev/fb/vgareg.h>
+
+#ifndef __i386__
+#include <isa/isareg.h>
+#else
+#include <i386/isa/isa.h>
+#endif
+
+#define	VESA_VIA_CLE266		"VIA CLE266\r\n"
+
+#ifndef VESA_DEBUG
+#define VESA_DEBUG	0
+#endif
+
+/* VESA video adapter state buffer stub */
+struct adp_state {
+	int		sig;
+#define V_STATE_SIG	0x61736576
+	u_char		regs[1];
+};
+typedef struct adp_state adp_state_t;
+
+/* VESA video adapter */
+static video_adapter_t *vesa_adp = NULL;
+static int vesa_state_buf_size = 0;
+#define VESA_VM86_BUFSIZE	(3 * PAGE_SIZE)
+static void *vesa_vm86_buf;
+
+/* VESA functions */
+#if 0
+static int			vesa_nop(void);
+#endif
+static int			vesa_error(void);
+static vi_probe_t		vesa_probe;
+static vi_init_t		vesa_init;
+static vi_get_info_t		vesa_get_info;
+static vi_query_mode_t		vesa_query_mode;
+static vi_set_mode_t		vesa_set_mode;
+static vi_save_font_t		vesa_save_font;
+static vi_load_font_t		vesa_load_font;
+static vi_show_font_t		vesa_show_font;
+static vi_save_palette_t	vesa_save_palette;
+static vi_load_palette_t	vesa_load_palette;
+static vi_set_border_t		vesa_set_border;
+static vi_save_state_t		vesa_save_state;
+static vi_load_state_t		vesa_load_state;
+static vi_set_win_org_t		vesa_set_origin;
+static vi_read_hw_cursor_t	vesa_read_hw_cursor;
+static vi_set_hw_cursor_t	vesa_set_hw_cursor;
+static vi_set_hw_cursor_shape_t	vesa_set_hw_cursor_shape;
+static vi_blank_display_t	vesa_blank_display;
+static vi_mmap_t		vesa_mmap;
+static vi_ioctl_t		vesa_ioctl;
+static vi_clear_t		vesa_clear;
+static vi_fill_rect_t		vesa_fill_rect;
+static vi_bitblt_t		vesa_bitblt;
+static vi_diag_t		vesa_diag;
+static int			vesa_bios_info(int level);
+static struct vm86context	vesa_vmcontext;
+
+static video_switch_t vesavidsw = {
+	vesa_probe,
+	vesa_init,
+	vesa_get_info,
+	vesa_query_mode,
+	vesa_set_mode,
+	vesa_save_font,
+	vesa_load_font,
+	vesa_show_font,
+	vesa_save_palette,
+	vesa_load_palette,
+	vesa_set_border,
+	vesa_save_state,
+	vesa_load_state,
+	vesa_set_origin,
+	vesa_read_hw_cursor,
+	vesa_set_hw_cursor,
+	vesa_set_hw_cursor_shape,
+	vesa_blank_display,
+	vesa_mmap,
+	vesa_ioctl,
+	vesa_clear,
+	vesa_fill_rect,
+	vesa_bitblt,
+	vesa_error,
+	vesa_error,
+	vesa_diag,
+};
+
+static video_switch_t *prevvidsw;
+
+/* VESA BIOS video modes */
+#define VESA_MAXMODES	64
+#define EOT		(-1)
+#define NA		(-2)
+
+#define MODE_TABLE_DELTA 8
+
+static int vesa_vmode_max = 0;
+static video_info_t vesa_vmode_empty = { EOT };
+static video_info_t *vesa_vmode = &vesa_vmode_empty;
+
+static int vesa_init_done = FALSE;
+static int has_vesa_bios = FALSE;
+static struct vesa_info *vesa_adp_info = NULL;
+static u_int16_t *vesa_vmodetab = NULL;
+static char *vesa_oemstr = NULL;
+static char *vesa_venderstr = NULL;
+static char *vesa_prodstr = NULL;
+static char *vesa_revstr = NULL;
+
+/* local macros and functions */
+#define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
+
+static int int10_set_mode(int mode);
+static int vesa_bios_get_mode(int mode, struct vesa_mode *vmode);
+static int vesa_bios_set_mode(int mode);
+static int vesa_bios_get_dac(void);
+static int vesa_bios_set_dac(int bits);
+static int vesa_bios_save_palette(int start, int colors, u_char *palette,
+				  int bits);
+static int vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g,
+				   u_char *b, int bits);
+static int vesa_bios_load_palette(int start, int colors, u_char *palette,
+				  int bits);
+#ifdef notyet
+static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
+				   u_char *b, int bits);
+#endif
+#define STATE_SIZE	0
+#define STATE_SAVE	1
+#define STATE_LOAD	2
+#define STATE_HW	(1<<0)
+#define STATE_DATA	(1<<1)
+#define STATE_DAC	(1<<2)
+#define STATE_REG	(1<<3)
+#define STATE_MOST	(STATE_HW | STATE_DATA | STATE_REG)
+#define STATE_ALL	(STATE_HW | STATE_DATA | STATE_DAC | STATE_REG)
+static int vesa_bios_state_buf_size(void);
+static int vesa_bios_save_restore(int code, void *p, size_t size);
+static int vesa_bios_get_line_length(void);
+static int vesa_bios_set_line_length(int pixel, int *bytes, int *lines);
+#if 0
+static int vesa_bios_get_start(int *x, int *y);
+#endif
+static int vesa_bios_set_start(int x, int y);
+static int vesa_map_gen_mode_num(int type, int color, int mode);
+static int vesa_translate_flags(u_int16_t vflags);
+static int vesa_translate_mmodel(u_int8_t vmodel);
+static void *vesa_fix_ptr(u_int32_t p, u_int16_t seg, u_int16_t off, 
+			  u_char *buf);
+static int vesa_bios_init(void);
+static void vesa_clear_modes(video_info_t *info, int color);
+static vm_offset_t vesa_map_buffer(u_int paddr, size_t size);
+static void vesa_unmap_buffer(vm_offset_t vaddr, size_t size);
+
+#if 0
+static int vesa_get_origin(video_adapter_t *adp, off_t *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");
+    }
+}
+
+/* INT 10 BIOS calls */
+static int
+int10_set_mode(int mode)
+{
+	struct vm86frame vmf;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x0000 | mode;
+	vm86_intcall(0x10, &vmf);
+	return 0;
+}
+
+/* VESA BIOS calls */
+static int
+vesa_bios_get_mode(int mode, struct vesa_mode *vmode)
+{
+	struct vm86frame vmf;
+	u_char *buf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f01; 
+	vmf.vmf_ecx = mode;
+	buf = vesa_vm86_buf;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+	bcopy(buf, vmode, sizeof(*vmode));
+	return 0;
+}
+
+static int
+vesa_bios_set_mode(int mode)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f02;
+	vmf.vmf_ebx = mode;
+	err = vm86_intcall(0x10, &vmf);
+	return ((err != 0) || (vmf.vmf_ax != 0x4f));
+}
+
+static int
+vesa_bios_get_dac(void)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f08;
+	vmf.vmf_ebx = 1;	/* get DAC width */
+	err = vm86_intcall(0x10, &vmf);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 6;	/* XXX */
+	return ((vmf.vmf_ebx >> 8) & 0x00ff);
+}
+
+static int
+vesa_bios_set_dac(int bits)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f08;
+	vmf.vmf_ebx = (bits << 8);
+	err = vm86_intcall(0x10, &vmf);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 6;	/* XXX */
+	return ((vmf.vmf_ebx >> 8) & 0x00ff);
+}
+
+static int
+vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
+{
+	struct vm86frame vmf;
+	u_char *p;
+	int err;
+	int i;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f09;
+	vmf.vmf_ebx = 1;	/* get primary palette data */
+	vmf.vmf_ecx = colors;
+	vmf.vmf_edx = start;
+	p = vesa_vm86_buf;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+
+	bits = 8 - bits;
+	for (i = 0; i < colors; ++i) {
+		palette[i*3]     = p[i*4 + 2] << bits;
+		palette[i*3 + 1] = p[i*4 + 1] << bits;
+		palette[i*3 + 2] = p[i*4] << bits;
+	}
+	return 0;
+}
+
+static int
+vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
+			int bits)
+{
+	struct vm86frame vmf;
+	u_char *p;
+	int err;
+	int i;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f09;
+	vmf.vmf_ebx = 1;	/* get primary palette data */
+	vmf.vmf_ecx = colors;
+	vmf.vmf_edx = start;
+	p = vesa_vm86_buf;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+
+	bits = 8 - bits;
+	for (i = 0; i < colors; ++i) {
+		r[i] = p[i*4 + 2] << bits;
+		g[i] = p[i*4 + 1] << bits;
+		b[i] = p[i*4] << bits;
+	}
+	return 0;
+}
+
+static int
+vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
+{
+	struct vm86frame vmf;
+	u_char *p;
+	int err;
+	int i;
+
+	p = vesa_vm86_buf;
+	bits = 8 - bits;
+	for (i = 0; i < colors; ++i) {
+		p[i*4]	   = palette[i*3 + 2] >> bits;
+		p[i*4 + 1] = palette[i*3 + 1] >> bits;
+		p[i*4 + 2] = palette[i*3] >> bits;
+		p[i*4 + 3] = 0;
+	}
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f09;
+	vmf.vmf_ebx = 0;	/* set primary palette data */
+	vmf.vmf_ecx = colors;
+	vmf.vmf_edx = start;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	return ((err != 0) || (vmf.vmf_ax != 0x4f));
+}
+
+#ifdef notyet
+static int
+vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
+			int bits)
+{
+	struct vm86frame vmf;
+	u_char *p;
+	int err;
+	int i;
+
+	p = vesa_vm86_buf;
+	bits = 8 - bits;
+	for (i = 0; i < colors; ++i) {
+		p[i*4]	   = b[i] >> bits;
+		p[i*4 + 1] = g[i] >> bits;
+		p[i*4 + 2] = r[i] >> bits;
+		p[i*4 + 3] = 0;
+	}
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f09;
+	vmf.vmf_ebx = 0;	/* set primary palette data */
+	vmf.vmf_ecx = colors;
+	vmf.vmf_edx = start;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	return ((err != 0) || (vmf.vmf_ax != 0x4f));
+}
+#endif
+
+static int
+vesa_bios_state_buf_size(void)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f04; 
+	vmf.vmf_ecx = STATE_ALL;
+	vmf.vmf_edx = STATE_SIZE;
+	err = vm86_intcall(0x10, &vmf);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 0;
+	return vmf.vmf_bx*64;
+}
+
+static int
+vesa_bios_save_restore(int code, void *p, size_t size)
+{
+	struct vm86frame vmf;
+	u_char *buf;
+	int err;
+
+	if (size > VESA_VM86_BUFSIZE)
+		return (1);
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f04; 
+	vmf.vmf_ecx = STATE_ALL;
+	vmf.vmf_edx = code;	/* STATE_SAVE/STATE_LOAD */
+	buf = vesa_vm86_buf;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_bx);
+	bcopy(p, buf, size);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	bcopy(buf, p, size);
+	return ((err != 0) || (vmf.vmf_ax != 0x4f));
+}
+
+static int
+vesa_bios_get_line_length(void)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f06; 
+	vmf.vmf_ebx = 1;	/* get scan line length */
+	err = vm86_intcall(0x10, &vmf);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return -1;
+	return vmf.vmf_bx;	/* line length in bytes */
+}
+
+static int
+vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f06; 
+	vmf.vmf_ebx = 0;	/* set scan line length in pixel */
+	vmf.vmf_ecx = pixel;
+	err = vm86_intcall(0x10, &vmf);
+#if VESA_DEBUG > 1
+	printf("bx:%d, cx:%d, dx:%d\n", vmf.vmf_bx, vmf.vmf_cx, vmf.vmf_dx); 
+#endif
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+	if (bytes)
+		*bytes = vmf.vmf_bx;
+	if (lines)
+		*lines = vmf.vmf_dx;
+	return 0;
+}
+
+#if 0
+static int
+vesa_bios_get_start(int *x, int *y)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f07; 
+	vmf.vmf_ebx = 1;	/* get display start */
+	err = vm86_intcall(0x10, &vmf);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+	*x = vmf.vmf_cx;
+	*y = vmf.vmf_dx;
+	return 0;
+}
+#endif
+
+static int
+vesa_bios_set_start(int x, int y)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f07; 
+	vmf.vmf_ebx = 0x80;	/* set display start */
+	vmf.vmf_edx = y;
+	vmf.vmf_ecx = x;
+	err = vm86_intcall(0x10, &vmf);
+	return ((err != 0) || (vmf.vmf_ax != 0x4f));
+}
+
+/* map a generic video mode to a known mode */
+static int
+vesa_map_gen_mode_num(int type, int color, int mode)
+{
+    static struct {
+	int from;
+	int to;
+    } mode_map[] = {
+	{ M_TEXT_132x25, M_VESA_C132x25 },
+	{ M_TEXT_132x43, M_VESA_C132x43 },
+	{ M_TEXT_132x50, M_VESA_C132x50 },
+	{ M_TEXT_132x60, M_VESA_C132x60 },
+    };
+    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;
+}
+
+static int
+vesa_translate_flags(u_int16_t vflags)
+{
+	static struct {
+		u_int16_t mask;
+		int set;
+		int reset;
+	} ftable[] = {
+		{ V_MODECOLOR, V_INFO_COLOR, 0 },
+		{ V_MODEGRAPHICS, V_INFO_GRAPHICS, 0 },
+		{ V_MODELFB, V_INFO_LINEAR, 0 },
+	};
+	int flags;
+	int i;
+
+	for (flags = 0, i = 0; i < sizeof(ftable)/sizeof(ftable[0]); ++i) {
+		flags |= (vflags & ftable[i].mask) ? 
+			 ftable[i].set : ftable[i].reset;
+	}
+	return flags;
+}
+
+static int
+vesa_translate_mmodel(u_int8_t vmodel)
+{
+	static struct {
+		u_int8_t vmodel;
+		int mmodel;
+	} mtable[] = {
+		{ V_MMTEXT,	V_INFO_MM_TEXT },
+		{ V_MMCGA,	V_INFO_MM_CGA },
+		{ V_MMHGC,	V_INFO_MM_HGC },
+		{ V_MMEGA,	V_INFO_MM_PLANAR },
+		{ V_MMPACKED,	V_INFO_MM_PACKED },
+		{ V_MMDIRCOLOR,	V_INFO_MM_DIRECT },
+	};
+	int i;
+
+	for (i = 0; mtable[i].mmodel >= 0; ++i) {
+		if (mtable[i].vmodel == vmodel)
+			return mtable[i].mmodel;
+	}
+	return V_INFO_MM_OTHER;
+}
+
+static void
+*vesa_fix_ptr(u_int32_t p, u_int16_t seg, u_int16_t off, u_char *buf)
+{
+	if (p == 0)
+		return NULL;
+	if (((p >> 16) == seg) && ((p & 0xffff) >= off))
+		return (void *)(buf + ((p & 0xffff) - off));
+	else {
+		p = BIOS_SADDRTOLADDR(p);
+		return (void *)BIOS_PADDRTOVADDR(p);
+	}
+}
+
+static int
+vesa_bios_init(void)
+{
+	static u_char buf[512];
+	struct vm86frame vmf;
+	struct vesa_mode vmode;
+	video_info_t *p;
+	u_char *vmbuf;
+	int is_via_cle266;
+	int modes;
+	int err;
+	int i;
+
+	if (vesa_init_done)
+		return 0;
+
+	has_vesa_bios = FALSE;
+	vesa_adp_info = NULL;
+	vesa_vmode_max = 0;
+	vesa_vmode[0].vi_mode = EOT;
+
+	/* Allocate a buffer and add each page to the vm86 context. */
+	vesa_vm86_buf = malloc(VESA_VM86_BUFSIZE, M_DEVBUF, M_WAITOK | M_ZERO);
+	KASSERT(((vm_offset_t)vesa_vm86_buf & PAGE_MASK) == 0,
+	    ("bad vesa_vm86_buf alignment"));
+	for (i = 0; i < howmany(VESA_VM86_BUFSIZE, PAGE_SIZE); i++)
+		vm86_addpage(&vesa_vmcontext, i + 1,
+		    (vm_offset_t)vesa_vm86_buf + PAGE_SIZE * i);
+
+	vmbuf = vesa_vm86_buf;
+	bzero(&vmf, sizeof(vmf));	/* paranoia */
+	bcopy("VBE2", vmbuf, 4);	/* try for VBE2 data */
+	vmf.vmf_eax = 0x4f00;
+	vm86_getptr(&vesa_vmcontext, (vm_offset_t)vmbuf, &vmf.vmf_es, &vmf.vmf_di);
+
+	err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
+	if ((err != 0) || (vmf.vmf_ax != 0x4f) || bcmp("VESA", vmbuf, 4))
+		return 1;
+	bcopy(vmbuf, buf, sizeof(buf));
+	vesa_adp_info = (struct vesa_info *)buf;
+	if (bootverbose) {
+		printf("VESA: information block\n");
+		dump_buffer(buf, 64);
+	}
+	if (vesa_adp_info->v_version < 0x0102) {
+		printf("VESA: VBE version %d.%d is not supported; "
+		       "version 1.2 or later is required.\n",
+		       ((vesa_adp_info->v_version & 0xf000) >> 12) * 10 
+			   + ((vesa_adp_info->v_version & 0x0f00) >> 8),
+		       ((vesa_adp_info->v_version & 0x00f0) >> 4) * 10 
+			   + (vesa_adp_info->v_version & 0x000f));
+		return 1;
+	}
+
+	/* fix string ptrs */
+	vesa_oemstr = (char *)vesa_fix_ptr(vesa_adp_info->v_oemstr,
+					   vmf.vmf_es, vmf.vmf_di, buf);
+	is_via_cle266 = strcmp(vesa_oemstr, VESA_VIA_CLE266) == 0;
+
+	if (vesa_adp_info->v_version >= 0x0200) {
+		vesa_venderstr = 
+		    (char *)vesa_fix_ptr(vesa_adp_info->v_venderstr,
+					 vmf.vmf_es, vmf.vmf_di, buf);
+		vesa_prodstr = 
+		    (char *)vesa_fix_ptr(vesa_adp_info->v_prodstr,
+					 vmf.vmf_es, vmf.vmf_di, buf);
+		vesa_revstr = 
+		    (char *)vesa_fix_ptr(vesa_adp_info->v_revstr,
+					 vmf.vmf_es, vmf.vmf_di, buf);
+	}
+
+	/* obtain video mode information */
+	vesa_vmodetab = (u_int16_t *)vesa_fix_ptr(vesa_adp_info->v_modetable,
+						  vmf.vmf_es, vmf.vmf_di, buf);
+	if (vesa_vmodetab == NULL)
+		return 1;
+	for (i = 0, modes = 0; 
+		(i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
+		&& (vesa_vmodetab[i] != 0xffff); ++i) {
+		if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode))
+			continue;
+
+		/* reject unsupported modes */
+#if 0
+		if ((vmode.v_modeattr & (V_MODESUPP | V_MODEOPTINFO 
+					| V_MODENONVGA))
+		    != (V_MODESUPP | V_MODEOPTINFO))
+			continue;
+#else
+		if ((vmode.v_modeattr & V_MODEOPTINFO) == 0) {
+#if VESA_DEBUG > 1
+			printf(
+		"Rejecting VESA %s mode: %d x %d x %d bpp  attr = %x\n",
+			    vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
+			    vmode.v_width, vmode.v_height, vmode.v_bpp,
+			    vmode.v_modeattr);
+#endif
+			continue;
+		}
+#endif
+
+		/* expand the array if necessary */
+		if (modes >= vesa_vmode_max) {
+			vesa_vmode_max += MODE_TABLE_DELTA;
+			p = malloc(sizeof(*vesa_vmode)*(vesa_vmode_max + 1),
+				   M_DEVBUF, M_WAITOK);
+#if VESA_DEBUG > 1
+			printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
+			       modes, vesa_vmode_max);
+#endif
+			if (modes > 0) {
+				bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
+				free(vesa_vmode, M_DEVBUF);
+			}
+			vesa_vmode = p;
+		}
+
+#if VESA_DEBUG > 1
+		printf("Found VESA %s mode: %d x %d x %d bpp\n",
+		    vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
+		    vmode.v_width, vmode.v_height, vmode.v_bpp);
+#endif
+		if (is_via_cle266) {
+		    if ((vmode.v_width & 0xff00) >> 8 == vmode.v_height - 1) {
+			vmode.v_width &= 0xff;
+			vmode.v_waseg = 0xb8000 >> 4;
+		    }
+		}
+
+		/* copy some fields */
+		bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
+		vesa_vmode[modes].vi_mode = vesa_vmodetab[i];
+		vesa_vmode[modes].vi_width = vmode.v_width;
+		vesa_vmode[modes].vi_height = vmode.v_height;
+		vesa_vmode[modes].vi_depth = vmode.v_bpp;
+		vesa_vmode[modes].vi_planes = vmode.v_planes;
+		vesa_vmode[modes].vi_cwidth = vmode.v_cwidth;
+		vesa_vmode[modes].vi_cheight = vmode.v_cheight;
+		vesa_vmode[modes].vi_window = (u_int)vmode.v_waseg << 4;
+		/* XXX window B */
+		vesa_vmode[modes].vi_window_size = vmode.v_wsize*1024;
+		vesa_vmode[modes].vi_window_gran = vmode.v_wgran*1024;
+		if (vmode.v_modeattr & V_MODELFB)
+			vesa_vmode[modes].vi_buffer = vmode.v_lfb;
+		else
+			vesa_vmode[modes].vi_buffer = 0;
+		/* XXX */
+		vesa_vmode[modes].vi_buffer_size
+			= vesa_adp_info->v_memsize*64*1024;
+#if 0
+		if (vmode.v_offscreen > vmode.v_lfb)
+			vesa_vmode[modes].vi_buffer_size
+				= vmode.v_offscreen + vmode.v_offscreensize*1024
+				      - vmode.v_lfb;
+		else
+			vesa_vmode[modes].vi_buffer_size
+				= vmode.v_offscreen + vmode.v_offscreensize*1024
+#endif
+		vesa_vmode[modes].vi_mem_model 
+			= vesa_translate_mmodel(vmode.v_memmodel);
+		vesa_vmode[modes].vi_pixel_fields[0] = 0;
+		vesa_vmode[modes].vi_pixel_fields[1] = 0;
+		vesa_vmode[modes].vi_pixel_fields[2] = 0;
+		vesa_vmode[modes].vi_pixel_fields[3] = 0;
+		vesa_vmode[modes].vi_pixel_fsizes[0] = 0;
+		vesa_vmode[modes].vi_pixel_fsizes[1] = 0;
+		vesa_vmode[modes].vi_pixel_fsizes[2] = 0;
+		vesa_vmode[modes].vi_pixel_fsizes[3] = 0;
+		if (vesa_vmode[modes].vi_mem_model == V_INFO_MM_PACKED) {
+			vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7)/8;
+		} else if (vesa_vmode[modes].vi_mem_model == V_INFO_MM_DIRECT) {
+			vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7)/8;
+			vesa_vmode[modes].vi_pixel_fields[0]
+			    = vmode.v_redfieldpos;
+			vesa_vmode[modes].vi_pixel_fields[1]
+			    = vmode.v_greenfieldpos;
+			vesa_vmode[modes].vi_pixel_fields[2]
+			    = vmode.v_bluefieldpos;
+			vesa_vmode[modes].vi_pixel_fields[3]
+			    = vmode.v_resfieldpos;
+			vesa_vmode[modes].vi_pixel_fsizes[0]
+			    = vmode.v_redmasksize;
+			vesa_vmode[modes].vi_pixel_fsizes[1]
+			    = vmode.v_greenmasksize;
+			vesa_vmode[modes].vi_pixel_fsizes[2]
+			    = vmode.v_bluemasksize;
+			vesa_vmode[modes].vi_pixel_fsizes[3]
+			    = vmode.v_resmasksize;
+		} else {
+			vesa_vmode[modes].vi_pixel_size = 0;
+		}
+		
+		vesa_vmode[modes].vi_flags 
+			= vesa_translate_flags(vmode.v_modeattr) | V_INFO_VESA;
+		++modes;
+	}
+	vesa_vmode[modes].vi_mode = EOT;
+	if (bootverbose)
+		printf("VESA: %d mode(s) found\n", modes);
+
+	has_vesa_bios = (modes > 0);
+	if (!has_vesa_bios)
+		return (1);
+
+	return (0);
+}
+
+static void
+vesa_clear_modes(video_info_t *info, int color)
+{
+	while (info->vi_mode != EOT) {
+		if ((info->vi_flags & V_INFO_COLOR) != color)
+			info->vi_mode = NA;
+		++info;
+	}
+}
+
+static vm_offset_t
+vesa_map_buffer(u_int paddr, size_t size)
+{
+	vm_offset_t vaddr;
+	u_int off;
+
+	off = paddr - trunc_page(paddr);
+	vaddr = (vm_offset_t)pmap_mapdev(paddr - off, size + off);
+#if VESA_DEBUG > 1
+	printf("vesa_map_buffer: paddr:%x vaddr:%x size:%x off:%x\n",
+	       paddr, vaddr, size, off);
+#endif
+	return (vaddr + off);
+}
+
+static void
+vesa_unmap_buffer(vm_offset_t vaddr, size_t size)
+{
+#if VESA_DEBUG > 1
+	printf("vesa_unmap_buffer: vaddr:%x size:%x\n", vaddr, size);
+#endif
+	kmem_free(kernel_map, vaddr, size);
+}
+
+/* entry points */
+
+static int
+vesa_configure(int flags)
+{
+	video_adapter_t *adp;
+	int adapters;
+	int error;
+	int i;
+
+	if (vesa_init_done)
+		return 0;
+	if (flags & VIO_PROBE_ONLY)
+		return 0;		/* XXX */
+
+	/*
+	 * If the VESA module has already been loaded, abort loading 
+	 * the module this time.
+	 */
+	for (i = 0; (adp = vid_get_adapter(i)) != NULL; ++i) {
+		if (adp->va_flags & V_ADP_VESA)
+			return ENXIO;
+		if (adp->va_type == KD_VGA)
+			break;
+	}
+	/*
+	 * The VGA adapter is not found.  This is because either 
+	 * 1) the VGA driver has not been initialized, or 2) the VGA card
+	 * is not present.  If 1) is the case, we shall defer
+	 * initialization for now and try again later.
+	 */
+	if (adp == NULL) {
+		vga_sub_configure = vesa_configure;
+		return ENODEV;
+	}
+
+	/* count number of registered adapters */
+	for (++i; vid_get_adapter(i) != NULL; ++i)
+		;
+	adapters = i;
+
+	/* call VESA BIOS */
+	vesa_adp = adp;
+	if (vesa_bios_init()) {
+		vesa_adp = NULL;
+		return ENXIO;
+	}
+	vesa_adp->va_flags |= V_ADP_VESA;
+
+	/* remove conflicting modes if we have more than one adapter */
+	if (adapters > 1) {
+		vesa_clear_modes(vesa_vmode,
+				 (vesa_adp->va_flags & V_ADP_COLOR) ? 
+				     V_INFO_COLOR : 0);
+	}
+
+	if ((error = vesa_load_ioctl()) == 0) {
+		prevvidsw = vidsw[vesa_adp->va_index];
+		vidsw[vesa_adp->va_index] = &vesavidsw;
+		vesa_init_done = TRUE;
+	} else {
+		vesa_adp = NULL;
+		return error;
+	}
+
+	return 0;
+}
+
+#if 0
+static int
+vesa_nop(void)
+{
+	return 0;
+}
+#endif
+
+static int
+vesa_error(void)
+{
+	return 1;
+}
+
+static int
+vesa_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
+{
+	return (*prevvidsw->probe)(unit, adpp, arg, flags);
+}
+
+static int
+vesa_init(int unit, video_adapter_t *adp, int flags)
+{
+	return (*prevvidsw->init)(unit, adp, flags);
+}
+
+static int
+vesa_get_info(video_adapter_t *adp, int mode, video_info_t *info)
+{
+	int i;
+
+	if ((*prevvidsw->get_info)(adp, mode, info) == 0)
+		return 0;
+
+	if (adp != vesa_adp)
+		return 1;
+
+	mode = vesa_map_gen_mode_num(vesa_adp->va_type, 
+				     vesa_adp->va_flags & V_ADP_COLOR, mode);
+	for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
+		if (vesa_vmode[i].vi_mode == NA)
+			continue;
+		if (vesa_vmode[i].vi_mode == mode) {
+			*info = vesa_vmode[i];
+			return 0;
+		}
+	}
+	return 1;
+}
+
+static int
+vesa_query_mode(video_adapter_t *adp, video_info_t *info)
+{
+	int i;
+
+	if ((*prevvidsw->query_mode)(adp, info) == 0)
+		return 0;
+	if (adp != vesa_adp)
+		return ENODEV;
+
+	for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
+		if ((info->vi_width != 0)
+		    && (info->vi_width != vesa_vmode[i].vi_width))
+			continue;
+		if ((info->vi_height != 0)
+		    && (info->vi_height != vesa_vmode[i].vi_height))
+			continue;
+		if ((info->vi_cwidth != 0)
+		    && (info->vi_cwidth != vesa_vmode[i].vi_cwidth))
+			continue;
+		if ((info->vi_cheight != 0)
+		    && (info->vi_cheight != vesa_vmode[i].vi_cheight))
+			continue;
+		if ((info->vi_depth != 0)
+		    && (info->vi_depth != vesa_vmode[i].vi_depth))
+			continue;
+		if ((info->vi_planes != 0)
+		    && (info->vi_planes != vesa_vmode[i].vi_planes))
+			continue;
+		/* pixel format, memory model */
+		if ((info->vi_flags != 0)
+		    && (info->vi_flags != vesa_vmode[i].vi_flags))
+			continue;
+		*info = vesa_vmode[i];
+		return 0;
+	}
+	return ENODEV;
+}
+
+static int
+vesa_set_mode(video_adapter_t *adp, int mode)
+{
+	video_info_t info;
+	int len;
+
+	if (adp != vesa_adp)
+		return (*prevvidsw->set_mode)(adp, mode);
+
+	mode = vesa_map_gen_mode_num(adp->va_type, 
+				     adp->va_flags & V_ADP_COLOR, mode);
+#if VESA_DEBUG > 0
+	printf("VESA: set_mode(): %d(%x) -> %d(%x)\n",
+		adp->va_mode, adp->va_mode, mode, mode);
+#endif
+	/* 
+	 * If the current mode is a VESA mode and the new mode is not,
+	 * restore the state of the adapter first by setting one of the
+	 * standard VGA mode, so that non-standard, extended SVGA registers 
+	 * are set to the state compatible with the standard VGA modes. 
+	 * Otherwise (*prevvidsw->set_mode)() may not be able to set up 
+	 * the new mode correctly.
+	 */
+	if (VESA_MODE(adp->va_mode)) {
+		if ((*prevvidsw->get_info)(adp, mode, &info) == 0) {
+			int10_set_mode(adp->va_initial_bios_mode);
+			if (adp->va_info.vi_flags & V_INFO_LINEAR)
+				vesa_unmap_buffer(adp->va_buffer,
+						  vesa_adp_info->v_memsize*64*1024);
+			/* 
+			 * Once (*prevvidsw->get_info)() succeeded, 
+			 * (*prevvidsw->set_mode)() below won't fail...
+			 */
+		}
+	}
+
+	/* we may not need to handle this mode after all... */
+	if ((*prevvidsw->set_mode)(adp, mode) == 0)
+		return 0;
+
+	/* is the new mode supported? */
+	if (vesa_get_info(adp, mode, &info))
+		return 1;
+	/* assert(VESA_MODE(mode)); */
+
+#if VESA_DEBUG > 0
+	printf("VESA: about to set a VESA mode...\n");
+#endif
+	/* don't use the linear frame buffer for text modes. XXX */
+	if (!(info.vi_flags & V_INFO_GRAPHICS))
+		info.vi_flags &= ~V_INFO_LINEAR;
+
+	if (vesa_bios_set_mode(mode | ((info.vi_flags & V_INFO_LINEAR) ? 0x4000 : 0)))
+		return 1;
+
+	if (adp->va_info.vi_flags & V_INFO_LINEAR)
+		vesa_unmap_buffer(adp->va_buffer,
+				  vesa_adp_info->v_memsize*64*1024);
+
+#if VESA_DEBUG > 0
+	printf("VESA: mode set!\n");
+#endif
+	vesa_adp->va_mode = mode;
+	vesa_adp->va_flags &= ~V_ADP_COLOR;
+	vesa_adp->va_flags |= 
+		(info.vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
+	vesa_adp->va_crtc_addr =
+		(vesa_adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
+	if (info.vi_flags & V_INFO_LINEAR) {
+#if VESA_DEBUG > 1
+		printf("VESA: setting up LFB\n");
+#endif
+		vesa_adp->va_buffer =
+			vesa_map_buffer(info.vi_buffer,
+					vesa_adp_info->v_memsize*64*1024);
+		vesa_adp->va_buffer_size = info.vi_buffer_size;
+		vesa_adp->va_window = vesa_adp->va_buffer;
+		vesa_adp->va_window_size = info.vi_buffer_size/info.vi_planes;
+		vesa_adp->va_window_gran = info.vi_buffer_size/info.vi_planes;
+	} else {
+		vesa_adp->va_buffer = 0;
+		vesa_adp->va_buffer_size = info.vi_buffer_size;
+		vesa_adp->va_window = BIOS_PADDRTOVADDR(info.vi_window);
+		vesa_adp->va_window_size = info.vi_window_size;
+		vesa_adp->va_window_gran = info.vi_window_gran;
+	}
+	vesa_adp->va_window_orig = 0;
+	len = vesa_bios_get_line_length();
+	if (len > 0) {
+		vesa_adp->va_line_width = len;
+	} else if (info.vi_flags & V_INFO_GRAPHICS) {
+		switch (info.vi_depth/info.vi_planes) {
+		case 1:
+			vesa_adp->va_line_width = info.vi_width/8;
+			break;
+		case 2:
+			vesa_adp->va_line_width = info.vi_width/4;
+			break;
+		case 4:
+			vesa_adp->va_line_width = info.vi_width/2;
+			break;
+		case 8:
+		default: /* shouldn't happen */
+			vesa_adp->va_line_width = info.vi_width;
+			break;
+		case 15:
+		case 16:
+			vesa_adp->va_line_width = info.vi_width*2;
+			break;
+		case 24:
+		case 32:
+			vesa_adp->va_line_width = info.vi_width*4;
+			break;
+		}
+	} else {
+		vesa_adp->va_line_width = info.vi_width;
+	}
+	vesa_adp->va_disp_start.x = 0;
+	vesa_adp->va_disp_start.y = 0;
+#if VESA_DEBUG > 0
+	printf("vesa_set_mode(): vi_width:%d, len:%d, line_width:%d\n",
+	       info.vi_width, len, vesa_adp->va_line_width);
+#endif
+	bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
+
+	/* move hardware cursor out of the way */
+	(*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
+
+	return 0;
+}
+
+static int
+vesa_save_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
+	       u_char *data, int ch, int count)
+{
+	return (*prevvidsw->save_font)(adp, page, fontsize, fontwidth, data,
+		ch, count);
+}
+
+static int
+vesa_load_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
+	       u_char *data, int ch, int count)
+{
+	return (*prevvidsw->load_font)(adp, page, fontsize, fontwidth, data,
+		ch, count);
+}
+
+static int
+vesa_show_font(video_adapter_t *adp, int page)
+{
+	return (*prevvidsw->show_font)(adp, page);
+}
+
+static int
+vesa_save_palette(video_adapter_t *adp, u_char *palette)
+{
+	int bits;
+	int error;
+
+	if ((adp == vesa_adp) && (vesa_adp_info->v_flags & V_DAC8)
+	    && VESA_MODE(adp->va_mode)) {
+		bits = vesa_bios_get_dac();
+		error = vesa_bios_save_palette(0, 256, palette, bits);
+		if (error == 0)
+			return 0;
+		if (bits != 6)
+			return error;
+	}
+
+	return (*prevvidsw->save_palette)(adp, palette);
+}
+
+static int
+vesa_load_palette(video_adapter_t *adp, u_char *palette)
+{
+#ifdef notyet
+	int bits;
+	int error;
+
+	if ((adp == vesa_adp) && (vesa_adp_info->v_flags & V_DAC8) 
+	    && VESA_MODE(adp->va_mode) && ((bits = vesa_bios_set_dac(8)) > 6)) {
+		error = vesa_bios_load_palette(0, 256, palette, bits);
+		if (error == 0)
+			return 0;
+		if (vesa_bios_set_dac(6) != 6)
+			return 1;
+	}
+#endif /* notyet */
+
+	return (*prevvidsw->load_palette)(adp, palette);
+}
+
+static int
+vesa_set_border(video_adapter_t *adp, int color)
+{
+	return (*prevvidsw->set_border)(adp, color);
+}
+
+static int
+vesa_save_state(video_adapter_t *adp, void *p, size_t size)
+{
+	if (adp != vesa_adp)
+		return (*prevvidsw->save_state)(adp, p, size);
+
+	if (vesa_state_buf_size == 0)
+		vesa_state_buf_size = vesa_bios_state_buf_size();
+	if (size == 0)
+		return (sizeof(int) + vesa_state_buf_size);
+	else if (size < (sizeof(int) + vesa_state_buf_size))
+		return 1;
+
+	((adp_state_t *)p)->sig = V_STATE_SIG;
+	bzero(((adp_state_t *)p)->regs, vesa_state_buf_size);
+	return vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs, 
+				      vesa_state_buf_size);
+}
+
+static int
+vesa_load_state(video_adapter_t *adp, void *p)
+{
+	if ((adp != vesa_adp) || (((adp_state_t *)p)->sig != V_STATE_SIG))
+		return (*prevvidsw->load_state)(adp, p);
+
+	return vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs, 
+				      vesa_state_buf_size);
+}
+
+#if 0
+static int
+vesa_get_origin(video_adapter_t *adp, off_t *offset)
+{
+	struct vm86frame vmf;
+	int err;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f05; 
+	vmf.vmf_ebx = 0x10;		/* WINDOW_A, XXX */
+	err = vm86_intcall(0x10, &vmf); 
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+	*offset = vmf.vmf_dx*adp->va_window_gran;
+	return 0;
+}
+#endif
+
+static int
+vesa_set_origin(video_adapter_t *adp, off_t offset)
+{
+	struct vm86frame vmf;
+	int err;
+
+	/*
+	 * This function should return as quickly as possible to 
+	 * maintain good performance of the system. For this reason,
+	 * error checking is kept minimal and let the VESA BIOS to 
+	 * detect error.
+	 */
+	if (adp != vesa_adp) 
+		return (*prevvidsw->set_win_org)(adp, offset);
+
+	/* if this is a linear frame buffer, do nothing */
+	if (adp->va_info.vi_flags & V_INFO_LINEAR)
+		return 0;
+	/* XXX */
+	if (adp->va_window_gran == 0)
+		return 1;
+
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f05; 
+	vmf.vmf_ebx = 0;		/* WINDOW_A, XXX */
+	vmf.vmf_edx = offset/adp->va_window_gran;
+	err = vm86_intcall(0x10, &vmf); 
+	if ((err != 0) || (vmf.vmf_ax != 0x4f))
+		return 1;
+	bzero(&vmf, sizeof(vmf));
+	vmf.vmf_eax = 0x4f05; 
+	vmf.vmf_ebx = 1;		/* WINDOW_B, XXX */
+	vmf.vmf_edx = offset/adp->va_window_gran;
+	err = vm86_intcall(0x10, &vmf); 
+	adp->va_window_orig = (offset/adp->va_window_gran)*adp->va_window_gran;
+	return 0;			/* XXX */
+}
+
+static int
+vesa_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
+{
+	return (*prevvidsw->read_hw_cursor)(adp, col, row);
+}
+
+static int
+vesa_set_hw_cursor(video_adapter_t *adp, int col, int row)
+{
+	return (*prevvidsw->set_hw_cursor)(adp, col, row);
+}
+
+static int
+vesa_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
+			 int celsize, int blink)
+{
+	return (*prevvidsw->set_hw_cursor_shape)(adp, base, height, celsize,
+						 blink);
+}
+
+static int
+vesa_blank_display(video_adapter_t *adp, int mode) 
+{
+	/* XXX: use VESA DPMS */
+	return (*prevvidsw->blank_display)(adp, mode);
+}
+
+static int
+vesa_mmap(video_adapter_t *adp, vm_offset_t offset, vm_paddr_t *paddr,
+	  int prot)
+{
+#if VESA_DEBUG > 0
+	printf("vesa_mmap(): window:0x%x, buffer:0x%x, offset:0x%x\n", 
+	       adp->va_info.vi_window, adp->va_info.vi_buffer, offset);
+#endif
+
+	if ((adp == vesa_adp) && (adp->va_info.vi_flags & V_INFO_LINEAR)) {
+		/* va_window_size == va_buffer_size/vi_planes */
+		/* XXX: is this correct? */
+		if (offset > adp->va_window_size - PAGE_SIZE)
+			return -1;
+		*paddr = adp->va_info.vi_buffer + offset;
+		return 0;
+	} else {
+		return (*prevvidsw->mmap)(adp, offset, paddr, prot);
+	}
+}
+
+static int
+vesa_clear(video_adapter_t *adp)
+{
+	return (*prevvidsw->clear)(adp);
+}
+
+static int
+vesa_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
+{
+	return (*prevvidsw->fill_rect)(adp, val, x, y, cx, cy);
+}
+
+static int
+vesa_bitblt(video_adapter_t *adp,...)
+{
+	/* FIXME */
+	return 1;
+}
+
+static int
+get_palette(video_adapter_t *adp, int base, int count,
+	    u_char *red, u_char *green, u_char *blue, u_char *trans)
+{
+	u_char *r;
+	u_char *g;
+	u_char *b;
+	int bits;
+	int error;
+
+	if ((base < 0) || (base >= 256) || (count < 0) || (count > 256))
+		return 1;
+	if ((base + count) > 256)
+		return 1;
+	if (!(vesa_adp_info->v_flags & V_DAC8) || !VESA_MODE(adp->va_mode))
+		return 1;
+
+	bits = vesa_bios_get_dac();
+	if (bits <= 6)
+		return 1;
+
+	r = malloc(count*3, M_DEVBUF, M_WAITOK);
+	g = r + count;
+	b = g + count;
+	error = vesa_bios_save_palette2(base, count, r, g, b, bits);
+	if (error == 0) {
+		copyout(r, red, count);
+		copyout(g, green, count);
+		copyout(b, blue, count);
+		if (trans != NULL) {
+			bzero(r, count);
+			copyout(r, trans, count);
+		}
+	}
+	free(r, M_DEVBUF);
+
+	/* if error && bits != 6 at this point, we are in trouble... XXX */
+	return error;
+}
+
+static int
+set_palette(video_adapter_t *adp, int base, int count,
+	    u_char *red, u_char *green, u_char *blue, u_char *trans)
+{
+	return 1;
+#ifdef notyet
+	u_char *r;
+	u_char *g;
+	u_char *b;
+	int bits;
+	int error;
+
+	if ((base < 0) || (base >= 256) || (base + count > 256))
+		return 1;
+	if (!(vesa_adp_info->v_flags & V_DAC8) || !VESA_MODE(adp->va_mode)
+		|| ((bits = vesa_bios_set_dac(8)) <= 6))
+		return 1;
+
+	r = malloc(count*3, M_DEVBUF, M_WAITOK);
+	g = r + count;
+	b = g + count;
+	copyin(red, r, count);
+	copyin(green, g, count);
+	copyin(blue, b, count);
+
+	error = vesa_bios_load_palette2(base, count, r, g, b, bits);
+	free(r, M_DEVBUF);
+	if (error == 0)
+		return 0;
+
+	/* if the following call fails, we are in trouble... XXX */
+	vesa_bios_set_dac(6);
+	return 1;
+#endif /* notyet */
+}
+
+static int
+vesa_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
+{
+	int bytes;
+
+	if (adp != vesa_adp)
+		return (*prevvidsw->ioctl)(adp, cmd, arg);
+
+	switch (cmd) {
+	case FBIO_SETWINORG:	/* set frame buffer window origin */
+		if (!VESA_MODE(adp->va_mode))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		return (vesa_set_origin(adp, *(off_t *)arg) ? ENODEV : 0);
+
+	case FBIO_SETDISPSTART:	/* set display start address */
+		if (!VESA_MODE(adp->va_mode))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		if (vesa_bios_set_start(((video_display_start_t *)arg)->x,
+					((video_display_start_t *)arg)->y))
+			return ENODEV;
+		adp->va_disp_start.x = ((video_display_start_t *)arg)->x;
+		adp->va_disp_start.y = ((video_display_start_t *)arg)->y;
+		return 0;
+
+	case FBIO_SETLINEWIDTH:	/* set line length in pixel */
+		if (!VESA_MODE(adp->va_mode))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		if (vesa_bios_set_line_length(*(u_int *)arg, &bytes, NULL))
+			return ENODEV;
+		adp->va_line_width = bytes;
+#if VESA_DEBUG > 1
+		printf("new line width:%d\n", adp->va_line_width);
+#endif
+		return 0;
+
+	case FBIO_GETPALETTE:	/* get color palette */
+		if (get_palette(adp, ((video_color_palette_t *)arg)->index,
+				((video_color_palette_t *)arg)->count,
+				((video_color_palette_t *)arg)->red,
+				((video_color_palette_t *)arg)->green,
+				((video_color_palette_t *)arg)->blue,
+				((video_color_palette_t *)arg)->transparent))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		return 0;
+
+
+	case FBIO_SETPALETTE:	/* set color palette */
+		if (set_palette(adp, ((video_color_palette_t *)arg)->index,
+				((video_color_palette_t *)arg)->count,
+				((video_color_palette_t *)arg)->red,
+				((video_color_palette_t *)arg)->green,
+				((video_color_palette_t *)arg)->blue,
+				((video_color_palette_t *)arg)->transparent))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		return 0;
+
+	case FBIOGETCMAP:	/* get color palette */
+		if (get_palette(adp, ((struct fbcmap *)arg)->index,
+				((struct fbcmap *)arg)->count,
+				((struct fbcmap *)arg)->red,
+				((struct fbcmap *)arg)->green,
+				((struct fbcmap *)arg)->blue, NULL))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		return 0;
+
+	case FBIOPUTCMAP:	/* set color palette */
+		if (set_palette(adp, ((struct fbcmap *)arg)->index,
+				((struct fbcmap *)arg)->count,
+				((struct fbcmap *)arg)->red,
+				((struct fbcmap *)arg)->green,
+				((struct fbcmap *)arg)->blue, NULL))
+			return (*prevvidsw->ioctl)(adp, cmd, arg);
+		return 0;
+
+	default:
+		return (*prevvidsw->ioctl)(adp, cmd, arg);
+	}
+}
+
+static int
+vesa_diag(video_adapter_t *adp, int level)
+{
+	int error;
+
+	/* call the previous handler first */
+	error = (*prevvidsw->diag)(adp, level);
+	if (error)
+		return error;
+
+	if (adp != vesa_adp)
+		return 1;
+
+	if (level <= 0)
+		return 0;
+
+	return 0;
+}
+
+static int
+vesa_bios_info(int level)
+{
+#if VESA_DEBUG > 1
+	struct vesa_mode vmode;
+	int i;
+#endif
+
+	if (bootverbose) {
+		/* general adapter information */
+		printf(
+	"VESA: v%d.%d, %dk memory, flags:0x%x, mode table:%p (%x)\n", 
+		    ((vesa_adp_info->v_version & 0xf000) >> 12) * 10 +
+		    ((vesa_adp_info->v_version & 0x0f00) >> 8),
+		    ((vesa_adp_info->v_version & 0x00f0) >> 4) * 10 +
+		    (vesa_adp_info->v_version & 0x000f),
+		    vesa_adp_info->v_memsize * 64, vesa_adp_info->v_flags,
+		    vesa_vmodetab, vesa_adp_info->v_modetable);
+
+		/* OEM string */
+		if (vesa_oemstr != NULL)
+			printf("VESA: %s\n", vesa_oemstr);
+	}
+
+	if (level <= 0)
+		return 0;
+
+	if (vesa_adp_info->v_version >= 0x0200 && bootverbose) {
+		/* vender name, product name, product revision */
+		printf("VESA: %s %s %s\n",
+			(vesa_venderstr != NULL) ? vesa_venderstr : "unknown",
+			(vesa_prodstr != NULL) ? vesa_prodstr : "unknown",
+			(vesa_revstr != NULL) ? vesa_revstr : "?");
+	}
+
+#if VESA_DEBUG > 1
+	/* mode information */
+	for (i = 0;
+		(i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
+		&& (vesa_vmodetab[i] != 0xffff); ++i) {
+		if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode))
+			continue;
+
+		/* print something for diagnostic purpose */
+		printf("VESA: mode:0x%03x, flags:0x%04x", 
+		       vesa_vmodetab[i], vmode.v_modeattr);
+		if (vmode.v_modeattr & V_MODEOPTINFO) {
+			if (vmode.v_modeattr & V_MODEGRAPHICS) {
+				printf(", G %dx%dx%d %d, ", 
+				       vmode.v_width, vmode.v_height,
+				       vmode.v_bpp, vmode.v_planes);
+			} else {
+				printf(", T %dx%d, ", 
+				       vmode.v_width, vmode.v_height);
+			}
+			printf("font:%dx%d, ", 
+			       vmode.v_cwidth, vmode.v_cheight);
+			printf("pages:%d, mem:%d",
+			       vmode.v_ipages + 1, vmode.v_memmodel);
+		}
+		if (vmode.v_modeattr & V_MODELFB) {
+			printf("\nVESA: LFB:0x%x, off:0x%x, off_size:0x%x", 
+			       vmode.v_lfb, vmode.v_offscreen,
+			       vmode.v_offscreensize*1024);
+		}
+		printf("\n");
+		printf("VESA: window A:0x%x (%x), window B:0x%x (%x), ",
+		       vmode.v_waseg, vmode.v_waattr,
+		       vmode.v_wbseg, vmode.v_wbattr);
+		printf("size:%dk, gran:%dk\n",
+		       vmode.v_wsize, vmode.v_wgran);
+	}
+#endif /* VESA_DEBUG > 1 */
+
+	return 0;
+}
+
+/* module loading */
+
+static int
+vesa_load(void)
+{
+	int error;
+	int s;
+
+	if (vesa_init_done)
+		return 0;
+
+	/* locate a VGA adapter */
+	s = spltty();
+	vesa_adp = NULL;
+	error = vesa_configure(0);
+	splx(s);
+
+	if (error == 0)
+		vesa_bios_info(bootverbose);
+
+	return error;
+}
+
+static int
+vesa_unload(void)
+{
+	u_char palette[256*3];
+	int error;
+	int bits;
+	int s;
+
+	/* if the adapter is currently in a VESA mode, don't unload */
+	if ((vesa_adp != NULL) && VESA_MODE(vesa_adp->va_mode))
+		return EBUSY;
+	/* 
+	 * FIXME: if there is at least one vty which is in a VESA mode,
+	 * we shouldn't be unloading! XXX
+	 */
+
+	s = spltty();
+	if ((error = vesa_unload_ioctl()) == 0) {
+		if (vesa_adp != NULL) {
+			if (vesa_adp_info->v_flags & V_DAC8)  {
+				bits = vesa_bios_get_dac();
+				if (bits > 6) {
+					vesa_bios_save_palette(0, 256,
+							       palette, bits);
+					vesa_bios_set_dac(6);
+					vesa_bios_load_palette(0, 256,
+							       palette, 6);
+				}
+			}
+			vesa_adp->va_flags &= ~V_ADP_VESA;
+			vidsw[vesa_adp->va_index] = prevvidsw;
+		}
+	}
+	splx(s);
+
+	if (vesa_vm86_buf != NULL)
+		free(vesa_vm86_buf, M_DEVBUF);
+
+	return error;
+}
+
+static int
+vesa_mod_event(module_t mod, int type, void *data)
+{
+	switch (type) {
+	case MOD_LOAD:
+		return vesa_load();
+	case MOD_UNLOAD:
+		return vesa_unload();
+	default:
+		return EOPNOTSUPP;
+	}
+	return 0;
+}
+
+static moduledata_t vesa_mod = {
+	"vesa",
+	vesa_mod_event,
+	NULL,
+};
+
+DECLARE_MODULE(vesa, vesa_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
+
+#endif	/* VGA_NO_MODE_CHANGE */