The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/vesa.c

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    1 /*-
    2  * Copyright (c) 1998 Kazutaka YOKOTA and Michael Smith
    3  * Copyright (c) 2009-2012 Jung-uk Kim <jkim@FreeBSD.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer as
   11  *    the first lines of this file unmodified.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/9.1/sys/dev/fb/vesa.c 233581 2012-03-27 23:59:48Z jkim $");
   30 
   31 #include "opt_vga.h"
   32 #include "opt_vesa.h"
   33 
   34 #ifndef VGA_NO_MODE_CHANGE
   35 
   36 #include <sys/param.h>
   37 #include <sys/bus.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/lock.h>
   41 #include <sys/module.h>
   42 #include <sys/malloc.h>
   43 #include <sys/mutex.h>
   44 #include <sys/fbio.h>
   45 #include <sys/sysctl.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/vm_extern.h>
   49 #include <vm/vm_kern.h>
   50 #include <vm/vm_param.h>
   51 #include <vm/pmap.h>
   52 
   53 #include <machine/pc/bios.h>
   54 #include <dev/fb/vesa.h>
   55 
   56 #include <dev/fb/fbreg.h>
   57 #include <dev/fb/vgareg.h>
   58 
   59 #include <dev/pci/pcivar.h>
   60 
   61 #include <isa/isareg.h>
   62 
   63 #include <compat/x86bios/x86bios.h>
   64 
   65 #define VESA_BIOS_OFFSET        0xc0000
   66 #define VESA_PALETTE_SIZE       (256 * 4)
   67 #define VESA_VIA_CLE266         "VIA CLE266\r\n"
   68 
   69 #ifndef VESA_DEBUG
   70 #define VESA_DEBUG      0
   71 #endif
   72 
   73 /* VESA video adapter state buffer stub */
   74 struct adp_state {
   75         int             sig;
   76 #define V_STATE_SIG     0x61736576
   77         u_char          regs[1];
   78 };
   79 typedef struct adp_state adp_state_t;
   80 
   81 static struct mtx vesa_lock;
   82 
   83 static int vesa_state;
   84 static void *vesa_state_buf;
   85 static uint32_t vesa_state_buf_offs;
   86 static ssize_t vesa_state_buf_size;
   87 
   88 static u_char *vesa_palette;
   89 static uint32_t vesa_palette_offs;
   90 
   91 static void *vesa_vmem_buf;
   92 
   93 static void *vesa_bios;
   94 static uint32_t vesa_bios_offs;
   95 static uint32_t vesa_bios_int10;
   96 static size_t vesa_bios_size;
   97 
   98 /* VESA video adapter */
   99 static video_adapter_t *vesa_adp;
  100 
  101 SYSCTL_NODE(_debug, OID_AUTO, vesa, CTLFLAG_RD, NULL, "VESA debugging");
  102 static int vesa_shadow_rom;
  103 TUNABLE_INT("debug.vesa.shadow_rom", &vesa_shadow_rom);
  104 SYSCTL_INT(_debug_vesa, OID_AUTO, shadow_rom, CTLFLAG_RDTUN, &vesa_shadow_rom,
  105     0, "Enable video BIOS shadow");
  106 
  107 /* VESA functions */
  108 #if 0
  109 static int                      vesa_nop(void);
  110 #endif
  111 static int                      vesa_error(void);
  112 static vi_probe_t               vesa_probe;
  113 static vi_init_t                vesa_init;
  114 static vi_get_info_t            vesa_get_info;
  115 static vi_query_mode_t          vesa_query_mode;
  116 static vi_set_mode_t            vesa_set_mode;
  117 static vi_save_font_t           vesa_save_font;
  118 static vi_load_font_t           vesa_load_font;
  119 static vi_show_font_t           vesa_show_font;
  120 static vi_save_palette_t        vesa_save_palette;
  121 static vi_load_palette_t        vesa_load_palette;
  122 static vi_set_border_t          vesa_set_border;
  123 static vi_save_state_t          vesa_save_state;
  124 static vi_load_state_t          vesa_load_state;
  125 static vi_set_win_org_t         vesa_set_origin;
  126 static vi_read_hw_cursor_t      vesa_read_hw_cursor;
  127 static vi_set_hw_cursor_t       vesa_set_hw_cursor;
  128 static vi_set_hw_cursor_shape_t vesa_set_hw_cursor_shape;
  129 static vi_blank_display_t       vesa_blank_display;
  130 static vi_mmap_t                vesa_mmap;
  131 static vi_ioctl_t               vesa_ioctl;
  132 static vi_clear_t               vesa_clear;
  133 static vi_fill_rect_t           vesa_fill_rect;
  134 static vi_bitblt_t              vesa_bitblt;
  135 static vi_diag_t                vesa_diag;
  136 static int                      vesa_bios_info(int level);
  137 
  138 static video_switch_t vesavidsw = {
  139         vesa_probe,
  140         vesa_init,
  141         vesa_get_info,
  142         vesa_query_mode,
  143         vesa_set_mode,
  144         vesa_save_font,
  145         vesa_load_font,
  146         vesa_show_font,
  147         vesa_save_palette,
  148         vesa_load_palette,
  149         vesa_set_border,
  150         vesa_save_state,
  151         vesa_load_state,
  152         vesa_set_origin,
  153         vesa_read_hw_cursor,
  154         vesa_set_hw_cursor,
  155         vesa_set_hw_cursor_shape,
  156         vesa_blank_display,
  157         vesa_mmap,
  158         vesa_ioctl,
  159         vesa_clear,
  160         vesa_fill_rect,
  161         vesa_bitblt,
  162         vesa_error,
  163         vesa_error,
  164         vesa_diag,
  165 };
  166 
  167 static video_switch_t *prevvidsw;
  168 
  169 /* VESA BIOS video modes */
  170 #define VESA_MAXMODES   64
  171 #define EOT             (-1)
  172 #define NA              (-2)
  173 
  174 #define MODE_TABLE_DELTA 8
  175 
  176 static int vesa_vmode_max;
  177 static video_info_t *vesa_vmode;
  178 
  179 static int vesa_init_done;
  180 static struct vesa_info *vesa_adp_info;
  181 static u_int16_t *vesa_vmodetab;
  182 static char *vesa_oemstr;
  183 static char *vesa_venderstr;
  184 static char *vesa_prodstr;
  185 static char *vesa_revstr;
  186 
  187 /* local macros and functions */
  188 #define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
  189 
  190 static int int10_set_mode(int mode);
  191 static int vesa_bios_post(void);
  192 static int vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags);
  193 static int vesa_bios_set_mode(int mode);
  194 #if 0
  195 static int vesa_bios_get_dac(void);
  196 #endif
  197 static int vesa_bios_set_dac(int bits);
  198 static int vesa_bios_save_palette(int start, int colors, u_char *palette,
  199                                   int bits);
  200 static int vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g,
  201                                    u_char *b, int bits);
  202 static int vesa_bios_load_palette(int start, int colors, u_char *palette,
  203                                   int bits);
  204 static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
  205                                    u_char *b, int bits);
  206 #define STATE_SIZE      0
  207 #define STATE_SAVE      1
  208 #define STATE_LOAD      2
  209 static ssize_t vesa_bios_state_buf_size(int);
  210 static int vesa_bios_save_restore(int code, void *p);
  211 #ifdef MODE_TABLE_BROKEN
  212 static int vesa_bios_get_line_length(void);
  213 #endif
  214 static int vesa_bios_set_line_length(int pixel, int *bytes, int *lines);
  215 #if 0
  216 static int vesa_bios_get_start(int *x, int *y);
  217 #endif
  218 static int vesa_bios_set_start(int x, int y);
  219 static int vesa_map_gen_mode_num(int type, int color, int mode);
  220 static int vesa_translate_flags(u_int16_t vflags);
  221 static int vesa_translate_mmodel(u_int8_t vmodel);
  222 static int vesa_get_bpscanline(struct vesa_mode *vmode);
  223 static int vesa_bios_init(void);
  224 static void vesa_bios_uninit(void);
  225 static void vesa_clear_modes(video_info_t *info, int color);
  226 
  227 #if 0
  228 static int vesa_get_origin(video_adapter_t *adp, off_t *offset);
  229 #endif
  230 
  231 /* INT 10 BIOS calls */
  232 static int
  233 int10_set_mode(int mode)
  234 {
  235         x86regs_t regs;
  236 
  237         x86bios_init_regs(&regs);
  238         regs.R_AL = mode;
  239 
  240         x86bios_intr(&regs, 0x10);
  241 
  242         return (0);
  243 }
  244 
  245 static int
  246 vesa_bios_post(void)
  247 {
  248         x86regs_t regs;
  249         devclass_t dc;
  250         device_t *devs;
  251         device_t dev;
  252         int count, i, is_pci;
  253 
  254         if (x86bios_get_orm(vesa_bios_offs) == NULL)
  255                 return (1);
  256 
  257         dev = NULL;
  258         is_pci = 0;
  259 
  260         /* Find the matching PCI video controller. */
  261         dc = devclass_find("vgapci");
  262         if (dc != NULL && devclass_get_devices(dc, &devs, &count) == 0) {
  263                 for (i = 0; i < count; i++)
  264                         if (device_get_flags(devs[i]) != 0 &&
  265                             x86bios_match_device(vesa_bios_offs, devs[i])) {
  266                                 dev = devs[i];
  267                                 is_pci = 1;
  268                                 break;
  269                         }
  270                 free(devs, M_TEMP);
  271         }
  272 
  273         /* Try VGA if a PCI device is not found. */
  274         if (dev == NULL) {
  275                 dc = devclass_find(VGA_DRIVER_NAME);
  276                 if (dc != NULL)
  277                         dev = devclass_get_device(dc, 0);
  278         }
  279 
  280         if (bootverbose)
  281                 printf("%s: calling BIOS POST\n",
  282                     dev == NULL ? "VESA" : device_get_nameunit(dev));
  283 
  284         x86bios_init_regs(&regs);
  285         if (is_pci) {
  286                 regs.R_AH = pci_get_bus(dev);
  287                 regs.R_AL = (pci_get_slot(dev) << 3) |
  288                     (pci_get_function(dev) & 0x07);
  289         }
  290         regs.R_DL = 0x80;
  291         x86bios_call(&regs, X86BIOS_PHYSTOSEG(vesa_bios_offs + 3),
  292             X86BIOS_PHYSTOOFF(vesa_bios_offs + 3));
  293 
  294         if (x86bios_get_intr(0x10) == 0)
  295                 return (1);
  296 
  297         return (0);
  298 }
  299 
  300 /* VESA BIOS calls */
  301 static int
  302 vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags)
  303 {
  304         x86regs_t regs;
  305         uint32_t offs;
  306         void *buf;
  307 
  308         buf = x86bios_alloc(&offs, sizeof(*vmode), flags);
  309         if (buf == NULL)
  310                 return (1);
  311 
  312         x86bios_init_regs(&regs);
  313         regs.R_AX = 0x4f01;
  314         regs.R_CX = mode;
  315 
  316         regs.R_ES = X86BIOS_PHYSTOSEG(offs);
  317         regs.R_DI = X86BIOS_PHYSTOOFF(offs);
  318 
  319         x86bios_intr(&regs, 0x10);
  320 
  321         if (regs.R_AX != 0x004f) {
  322                 x86bios_free(buf, sizeof(*vmode));
  323                 return (1);
  324         }
  325 
  326         bcopy(buf, vmode, sizeof(*vmode));
  327         x86bios_free(buf, sizeof(*vmode));
  328 
  329         return (0);
  330 }
  331 
  332 static int
  333 vesa_bios_set_mode(int mode)
  334 {
  335         x86regs_t regs;
  336 
  337         x86bios_init_regs(&regs);
  338         regs.R_AX = 0x4f02;
  339         regs.R_BX = mode;
  340 
  341         x86bios_intr(&regs, 0x10);
  342 
  343         return (regs.R_AX != 0x004f);
  344 }
  345 
  346 #if 0
  347 static int
  348 vesa_bios_get_dac(void)
  349 {
  350         x86regs_t regs;
  351 
  352         x86bios_init_regs(&regs);
  353         regs.R_AX = 0x4f08;
  354         regs.R_BL = 1;
  355 
  356         x86bios_intr(&regs, 0x10);
  357 
  358         if (regs.R_AX != 0x004f)
  359                 return (6);
  360 
  361         return (regs.R_BH);
  362 }
  363 #endif
  364 
  365 static int
  366 vesa_bios_set_dac(int bits)
  367 {
  368         x86regs_t regs;
  369 
  370         x86bios_init_regs(&regs);
  371         regs.R_AX = 0x4f08;
  372         /* regs.R_BL = 0; */
  373         regs.R_BH = bits;
  374 
  375         x86bios_intr(&regs, 0x10);
  376 
  377         if (regs.R_AX != 0x004f)
  378                 return (6);
  379 
  380         return (regs.R_BH);
  381 }
  382 
  383 static int
  384 vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
  385 {
  386         x86regs_t regs;
  387         int i;
  388 
  389         x86bios_init_regs(&regs);
  390         regs.R_AX = 0x4f09;
  391         regs.R_BL = 1;
  392         regs.R_CX = colors;
  393         regs.R_DX = start;
  394 
  395         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  396         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  397 
  398         bits = 8 - bits;
  399         mtx_lock(&vesa_lock);
  400         x86bios_intr(&regs, 0x10);
  401         if (regs.R_AX != 0x004f) {
  402                 mtx_unlock(&vesa_lock);
  403                 return (1);
  404         }
  405         for (i = 0; i < colors; ++i) {
  406                 palette[i * 3] = vesa_palette[i * 4 + 2] << bits;
  407                 palette[i * 3 + 1] = vesa_palette[i * 4 + 1] << bits;
  408                 palette[i * 3 + 2] = vesa_palette[i * 4] << bits;
  409         }
  410         mtx_unlock(&vesa_lock);
  411 
  412         return (0);
  413 }
  414 
  415 static int
  416 vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  417                         int bits)
  418 {
  419         x86regs_t regs;
  420         int i;
  421 
  422         x86bios_init_regs(&regs);
  423         regs.R_AX = 0x4f09;
  424         regs.R_BL = 1;
  425         regs.R_CX = colors;
  426         regs.R_DX = start;
  427 
  428         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  429         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  430 
  431         bits = 8 - bits;
  432         mtx_lock(&vesa_lock);
  433         x86bios_intr(&regs, 0x10);
  434         if (regs.R_AX != 0x004f) {
  435                 mtx_unlock(&vesa_lock);
  436                 return (1);
  437         }
  438         for (i = 0; i < colors; ++i) {
  439                 r[i] = vesa_palette[i * 4 + 2] << bits;
  440                 g[i] = vesa_palette[i * 4 + 1] << bits;
  441                 b[i] = vesa_palette[i * 4] << bits;
  442         }
  443         mtx_unlock(&vesa_lock);
  444 
  445         return (0);
  446 }
  447 
  448 static int
  449 vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
  450 {
  451         x86regs_t regs;
  452         int i;
  453 
  454         x86bios_init_regs(&regs);
  455         regs.R_AX = 0x4f09;
  456         /* regs.R_BL = 0; */
  457         regs.R_CX = colors;
  458         regs.R_DX = start;
  459 
  460         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  461         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  462 
  463         bits = 8 - bits;
  464         mtx_lock(&vesa_lock);
  465         for (i = 0; i < colors; ++i) {
  466                 vesa_palette[i * 4] = palette[i * 3 + 2] >> bits;
  467                 vesa_palette[i * 4 + 1] = palette[i * 3 + 1] >> bits;
  468                 vesa_palette[i * 4 + 2] = palette[i * 3] >> bits;
  469                 vesa_palette[i * 4 + 3] = 0;
  470         }
  471         x86bios_intr(&regs, 0x10);
  472         mtx_unlock(&vesa_lock);
  473 
  474         return (regs.R_AX != 0x004f);
  475 }
  476 
  477 static int
  478 vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  479                         int bits)
  480 {
  481         x86regs_t regs;
  482         int i;
  483 
  484         x86bios_init_regs(&regs);
  485         regs.R_AX = 0x4f09;
  486         /* regs.R_BL = 0; */
  487         regs.R_CX = colors;
  488         regs.R_DX = start;
  489 
  490         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  491         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  492 
  493         bits = 8 - bits;
  494         mtx_lock(&vesa_lock);
  495         for (i = 0; i < colors; ++i) {
  496                 vesa_palette[i * 4] = b[i] >> bits;
  497                 vesa_palette[i * 4 + 1] = g[i] >> bits;
  498                 vesa_palette[i * 4 + 2] = r[i] >> bits;
  499                 vesa_palette[i * 4 + 3] = 0;
  500         }
  501         x86bios_intr(&regs, 0x10);
  502         mtx_unlock(&vesa_lock);
  503 
  504         return (regs.R_AX != 0x004f);
  505 }
  506 
  507 static ssize_t
  508 vesa_bios_state_buf_size(int state)
  509 {
  510         x86regs_t regs;
  511 
  512         x86bios_init_regs(&regs);
  513         regs.R_AX = 0x4f04;
  514         /* regs.R_DL = STATE_SIZE; */
  515         regs.R_CX = state;
  516 
  517         x86bios_intr(&regs, 0x10);
  518 
  519         if (regs.R_AX != 0x004f)
  520                 return (0);
  521 
  522         return (regs.R_BX * 64);
  523 }
  524 
  525 static int
  526 vesa_bios_save_restore(int code, void *p)
  527 {
  528         x86regs_t regs;
  529 
  530         if (code != STATE_SAVE && code != STATE_LOAD)
  531                 return (1);
  532 
  533         x86bios_init_regs(&regs);
  534         regs.R_AX = 0x4f04;
  535         regs.R_DL = code;
  536         regs.R_CX = vesa_state;
  537 
  538         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_state_buf_offs);
  539         regs.R_BX = X86BIOS_PHYSTOOFF(vesa_state_buf_offs);
  540 
  541         mtx_lock(&vesa_lock);
  542         switch (code) {
  543         case STATE_SAVE:
  544                 x86bios_intr(&regs, 0x10);
  545                 bcopy(vesa_state_buf, p, vesa_state_buf_size);
  546                 break;
  547         case STATE_LOAD:
  548                 bcopy(p, vesa_state_buf, vesa_state_buf_size);
  549                 x86bios_intr(&regs, 0x10);
  550                 break;
  551         }
  552         mtx_unlock(&vesa_lock);
  553 
  554         return (regs.R_AX != 0x004f);
  555 }
  556 
  557 #ifdef MODE_TABLE_BROKEN
  558 static int
  559 vesa_bios_get_line_length(void)
  560 {
  561         x86regs_t regs;
  562 
  563         x86bios_init_regs(&regs);
  564         regs.R_AX = 0x4f06;
  565         regs.R_BL = 1;
  566 
  567         x86bios_intr(&regs, 0x10);
  568 
  569         if (regs.R_AX != 0x004f)
  570                 return (-1);
  571 
  572         return (regs.R_BX);
  573 }
  574 #endif
  575 
  576 static int
  577 vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
  578 {
  579         x86regs_t regs;
  580 
  581         x86bios_init_regs(&regs);
  582         regs.R_AX = 0x4f06;
  583         /* regs.R_BL = 0; */
  584         regs.R_CX = pixel;
  585 
  586         x86bios_intr(&regs, 0x10);
  587 
  588 #if VESA_DEBUG > 1
  589         printf("bx:%d, cx:%d, dx:%d\n", regs.R_BX, regs.R_CX, regs.R_DX);
  590 #endif
  591         if (regs.R_AX != 0x004f)
  592                 return (-1);
  593 
  594         if (bytes != NULL)
  595                 *bytes = regs.R_BX;
  596         if (lines != NULL)
  597                 *lines = regs.R_DX;
  598 
  599         return (0);
  600 }
  601 
  602 #if 0
  603 static int
  604 vesa_bios_get_start(int *x, int *y)
  605 {
  606         x86regs_t regs;
  607 
  608         x86bios_init_regs(&regs);
  609         regs.R_AX = 0x4f07;
  610         regs.R_BL = 1;
  611 
  612         x86bios_intr(&regs, 0x10);
  613 
  614         if (regs.R_AX != 0x004f)
  615                 return (-1);
  616 
  617         *x = regs.R_CX;
  618         *y = regs.R_DX;
  619 
  620         return (0);
  621 }
  622 #endif
  623 
  624 static int
  625 vesa_bios_set_start(int x, int y)
  626 {
  627         x86regs_t regs;
  628 
  629         x86bios_init_regs(&regs);
  630         regs.R_AX = 0x4f07;
  631         regs.R_BL = 0x80;
  632         regs.R_CX = x;
  633         regs.R_DX = y;
  634 
  635         x86bios_intr(&regs, 0x10);
  636 
  637         return (regs.R_AX != 0x004f);
  638 }
  639 
  640 /* map a generic video mode to a known mode */
  641 static int
  642 vesa_map_gen_mode_num(int type, int color, int mode)
  643 {
  644     static struct {
  645         int from;
  646         int to;
  647     } mode_map[] = {
  648         { M_TEXT_132x25, M_VESA_C132x25 },
  649         { M_TEXT_132x43, M_VESA_C132x43 },
  650         { M_TEXT_132x50, M_VESA_C132x50 },
  651         { M_TEXT_132x60, M_VESA_C132x60 },
  652     };
  653     int i;
  654 
  655     for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
  656         if (mode_map[i].from == mode)
  657             return (mode_map[i].to);
  658     }
  659     return (mode);
  660 }
  661 
  662 static int
  663 vesa_translate_flags(u_int16_t vflags)
  664 {
  665         static struct {
  666                 u_int16_t mask;
  667                 int set;
  668                 int reset;
  669         } ftable[] = {
  670                 { V_MODECOLOR, V_INFO_COLOR, 0 },
  671                 { V_MODEGRAPHICS, V_INFO_GRAPHICS, 0 },
  672                 { V_MODELFB, V_INFO_LINEAR, 0 },
  673                 { V_MODENONVGA, V_INFO_NONVGA, 0 },
  674         };
  675         int flags;
  676         int i;
  677 
  678         for (flags = 0, i = 0; i < sizeof(ftable)/sizeof(ftable[0]); ++i) {
  679                 flags |= (vflags & ftable[i].mask) ? 
  680                          ftable[i].set : ftable[i].reset;
  681         }
  682         return (flags);
  683 }
  684 
  685 static int
  686 vesa_translate_mmodel(u_int8_t vmodel)
  687 {
  688         static struct {
  689                 u_int8_t vmodel;
  690                 int mmodel;
  691         } mtable[] = {
  692                 { V_MMTEXT,     V_INFO_MM_TEXT },
  693                 { V_MMCGA,      V_INFO_MM_CGA },
  694                 { V_MMHGC,      V_INFO_MM_HGC },
  695                 { V_MMEGA,      V_INFO_MM_PLANAR },
  696                 { V_MMPACKED,   V_INFO_MM_PACKED },
  697                 { V_MMDIRCOLOR, V_INFO_MM_DIRECT },
  698         };
  699         int i;
  700 
  701         for (i = 0; mtable[i].mmodel >= 0; ++i) {
  702                 if (mtable[i].vmodel == vmodel)
  703                         return (mtable[i].mmodel);
  704         }
  705         return (V_INFO_MM_OTHER);
  706 }
  707 
  708 static int
  709 vesa_get_bpscanline(struct vesa_mode *vmode)
  710 {
  711         int bpsl;
  712 
  713         if ((vmode->v_modeattr & V_MODEGRAPHICS) != 0) {
  714                 /* Find the minimum length. */
  715                 switch (vmode->v_bpp / vmode->v_planes) {
  716                 case 1:
  717                         bpsl = vmode->v_width / 8;
  718                         break;
  719                 case 2:
  720                         bpsl = vmode->v_width / 4;
  721                         break;
  722                 case 4:
  723                         bpsl = vmode->v_width / 2;
  724                         break;
  725                 default:
  726                         bpsl = vmode->v_width * ((vmode->v_bpp + 7) / 8);
  727                         bpsl /= vmode->v_planes;
  728                         break;
  729                 }
  730 
  731                 /* Use VBE 3.0 information if it looks sane. */
  732                 if ((vmode->v_modeattr & V_MODELFB) != 0 &&
  733                     vesa_adp_info->v_version >= 0x0300 &&
  734                     vmode->v_linbpscanline > bpsl)
  735                         return (vmode->v_linbpscanline);
  736 
  737                 /* Return the minimum if the mode table looks absurd. */
  738                 if (vmode->v_bpscanline < bpsl)
  739                         return (bpsl);
  740         }
  741 
  742         return (vmode->v_bpscanline);
  743 }
  744 
  745 #define VESA_MAXSTR             256
  746 
  747 #define VESA_STRCPY(dst, src)   do {                            \
  748         char *str;                                              \
  749         int i;                                                  \
  750         dst = malloc(VESA_MAXSTR, M_DEVBUF, M_WAITOK);          \
  751         str = x86bios_offset(BIOS_SADDRTOLADDR(src));           \
  752         for (i = 0; i < VESA_MAXSTR - 1 && str[i] != '\0'; i++) \
  753                 dst[i] = str[i];                                \
  754         dst[i] = '\0';                                          \
  755 } while (0)
  756 
  757 static int
  758 vesa_bios_init(void)
  759 {
  760         struct vesa_mode vmode;
  761         struct vesa_info *buf;
  762         video_info_t *p;
  763         x86regs_t regs;
  764         size_t bsize;
  765         size_t msize;
  766         void *vmbuf;
  767         uint8_t *vbios;
  768         uint32_t offs;
  769         uint16_t vers;
  770         int is_via_cle266;
  771         int modes;
  772         int i;
  773 
  774         if (vesa_init_done)
  775                 return (0);
  776 
  777         vesa_bios_offs = VESA_BIOS_OFFSET;
  778 
  779         /*
  780          * If the VBE real mode interrupt vector is not found, try BIOS POST.
  781          */
  782         vesa_bios_int10 = x86bios_get_intr(0x10);
  783         if (vesa_bios_int10 == 0) {
  784                 if (vesa_bios_post() != 0)
  785                         return (1);
  786                 vesa_bios_int10 = x86bios_get_intr(0x10);
  787                 if (vesa_bios_int10 == 0)
  788                         return (1);
  789         }
  790 
  791         /*
  792          * Shadow video ROM.
  793          */
  794         offs = vesa_bios_int10;
  795         if (vesa_shadow_rom) {
  796                 vbios = x86bios_get_orm(vesa_bios_offs);
  797                 if (vbios != NULL) {
  798                         vesa_bios_size = vbios[2] * 512;
  799                         if (((VESA_BIOS_OFFSET << 12) & 0xffff0000) ==
  800                             (vesa_bios_int10 & 0xffff0000) &&
  801                             vesa_bios_size > (vesa_bios_int10 & 0xffff)) {
  802                                 vesa_bios = x86bios_alloc(&vesa_bios_offs,
  803                                     vesa_bios_size, M_WAITOK);
  804                                 bcopy(vbios, vesa_bios, vesa_bios_size);
  805                                 offs = ((vesa_bios_offs << 12) & 0xffff0000) +
  806                                     (vesa_bios_int10 & 0xffff);
  807                                 x86bios_set_intr(0x10, offs);
  808                         }
  809                 }
  810                 if (vesa_bios == NULL)
  811                         printf("VESA: failed to shadow video ROM\n");
  812         }
  813         if (bootverbose)
  814                 printf("VESA: INT 0x10 vector 0x%04x:0x%04x\n",
  815                     (offs >> 16) & 0xffff, offs & 0xffff);
  816 
  817         x86bios_init_regs(&regs);
  818         regs.R_AX = 0x4f00;
  819 
  820         vmbuf = x86bios_alloc(&offs, sizeof(*buf), M_WAITOK);
  821 
  822         regs.R_ES = X86BIOS_PHYSTOSEG(offs);
  823         regs.R_DI = X86BIOS_PHYSTOOFF(offs);
  824 
  825         bcopy("VBE2", vmbuf, 4);        /* try for VBE2 data */
  826         x86bios_intr(&regs, 0x10);
  827 
  828         if (regs.R_AX != 0x004f || bcmp("VESA", vmbuf, 4) != 0)
  829                 goto fail;
  830 
  831         vesa_adp_info = buf = malloc(sizeof(*buf), M_DEVBUF, M_WAITOK);
  832         bcopy(vmbuf, buf, sizeof(*buf));
  833 
  834         if (bootverbose) {
  835                 printf("VESA: information block\n");
  836                 hexdump(buf, sizeof(*buf), NULL, HD_OMIT_CHARS);
  837         }
  838 
  839         vers = buf->v_version = le16toh(buf->v_version);
  840         buf->v_oemstr = le32toh(buf->v_oemstr);
  841         buf->v_flags = le32toh(buf->v_flags);
  842         buf->v_modetable = le32toh(buf->v_modetable);
  843         buf->v_memsize = le16toh(buf->v_memsize);
  844         buf->v_revision = le16toh(buf->v_revision);
  845         buf->v_venderstr = le32toh(buf->v_venderstr);
  846         buf->v_prodstr = le32toh(buf->v_prodstr);
  847         buf->v_revstr = le32toh(buf->v_revstr);
  848 
  849         if (vers < 0x0102) {
  850                 printf("VESA: VBE version %d.%d is not supported; "
  851                     "version 1.2 or later is required.\n",
  852                     ((vers & 0xf000) >> 12) * 10 + ((vers & 0x0f00) >> 8),
  853                     ((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f));
  854                 goto fail;
  855         }
  856 
  857         VESA_STRCPY(vesa_oemstr, buf->v_oemstr);
  858         if (vers >= 0x0200) {
  859                 VESA_STRCPY(vesa_venderstr, buf->v_venderstr);
  860                 VESA_STRCPY(vesa_prodstr, buf->v_prodstr);
  861                 VESA_STRCPY(vesa_revstr, buf->v_revstr);
  862         }
  863         is_via_cle266 = strncmp(vesa_oemstr, VESA_VIA_CLE266,
  864             sizeof(VESA_VIA_CLE266)) == 0;
  865 
  866         if (buf->v_modetable == 0)
  867                 goto fail;
  868 
  869         msize = (size_t)buf->v_memsize * 64 * 1024;
  870 
  871         vesa_vmodetab = x86bios_offset(BIOS_SADDRTOLADDR(buf->v_modetable));
  872 
  873         for (i = 0, modes = 0; (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1)) &&
  874             (vesa_vmodetab[i] != 0xffff); ++i) {
  875                 vesa_vmodetab[i] = le16toh(vesa_vmodetab[i]);
  876                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_WAITOK))
  877                         continue;
  878 
  879                 vmode.v_modeattr = le16toh(vmode.v_modeattr);
  880                 vmode.v_wgran = le16toh(vmode.v_wgran);
  881                 vmode.v_wsize = le16toh(vmode.v_wsize);
  882                 vmode.v_waseg = le16toh(vmode.v_waseg);
  883                 vmode.v_wbseg = le16toh(vmode.v_wbseg);
  884                 vmode.v_posfunc = le32toh(vmode.v_posfunc);
  885                 vmode.v_bpscanline = le16toh(vmode.v_bpscanline);
  886                 vmode.v_width = le16toh(vmode.v_width);
  887                 vmode.v_height = le16toh(vmode.v_height);
  888                 vmode.v_lfb = le32toh(vmode.v_lfb);
  889                 vmode.v_offscreen = le32toh(vmode.v_offscreen);
  890                 vmode.v_offscreensize = le16toh(vmode.v_offscreensize);
  891                 vmode.v_linbpscanline = le16toh(vmode.v_linbpscanline);
  892                 vmode.v_maxpixelclock = le32toh(vmode.v_maxpixelclock);
  893 
  894                 /* reject unsupported modes */
  895 #if 0
  896                 if ((vmode.v_modeattr &
  897                     (V_MODESUPP | V_MODEOPTINFO | V_MODENONVGA)) !=
  898                     (V_MODESUPP | V_MODEOPTINFO))
  899                         continue;
  900 #else
  901                 if ((vmode.v_modeattr & V_MODEOPTINFO) == 0) {
  902 #if VESA_DEBUG > 1
  903                         printf("Rejecting VESA %s mode: %d x %d x %d bpp "
  904                             " attr = %x\n",
  905                             vmode.v_modeattr & V_MODEGRAPHICS ?
  906                             "graphics" : "text",
  907                             vmode.v_width, vmode.v_height, vmode.v_bpp,
  908                             vmode.v_modeattr);
  909 #endif
  910                         continue;
  911                 }
  912 #endif
  913 
  914                 bsize = vesa_get_bpscanline(&vmode) * vmode.v_height;
  915                 if ((vmode.v_modeattr & V_MODEGRAPHICS) != 0)
  916                         bsize *= vmode.v_planes;
  917 
  918                 /* Does it have enough memory to support this mode? */
  919                 if (msize < bsize) {
  920 #if VESA_DEBUG > 1
  921                         printf("Rejecting VESA %s mode: %d x %d x %d bpp "
  922                             " attr = %x, not enough memory\n",
  923                             vmode.v_modeattr & V_MODEGRAPHICS ?
  924                             "graphics" : "text",
  925                             vmode.v_width, vmode.v_height, vmode.v_bpp,
  926                             vmode.v_modeattr);
  927 #endif
  928                         continue;
  929                 }
  930 
  931                 /* expand the array if necessary */
  932                 if (modes >= vesa_vmode_max) {
  933                         vesa_vmode_max += MODE_TABLE_DELTA;
  934                         p = malloc(sizeof(*vesa_vmode) * (vesa_vmode_max + 1),
  935                             M_DEVBUF, M_WAITOK);
  936 #if VESA_DEBUG > 1
  937                         printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
  938                             modes, vesa_vmode_max);
  939 #endif
  940                         if (modes > 0) {
  941                                 bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
  942                                 free(vesa_vmode, M_DEVBUF);
  943                         }
  944                         vesa_vmode = p;
  945                 }
  946 
  947 #if VESA_DEBUG > 1
  948                 printf("Found VESA %s mode: %d x %d x %d bpp\n",
  949                     vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
  950                     vmode.v_width, vmode.v_height, vmode.v_bpp);
  951 #endif
  952                 if (is_via_cle266) {
  953                     if ((vmode.v_width & 0xff00) >> 8 == vmode.v_height - 1) {
  954                         vmode.v_width &= 0xff;
  955                         vmode.v_waseg = 0xb8000 >> 4;
  956                     }
  957                 }
  958 
  959                 /* copy some fields */
  960                 bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
  961                 vesa_vmode[modes].vi_mode = vesa_vmodetab[i];
  962                 vesa_vmode[modes].vi_width = vmode.v_width;
  963                 vesa_vmode[modes].vi_height = vmode.v_height;
  964                 vesa_vmode[modes].vi_depth = vmode.v_bpp;
  965                 vesa_vmode[modes].vi_planes = vmode.v_planes;
  966                 vesa_vmode[modes].vi_cwidth = vmode.v_cwidth;
  967                 vesa_vmode[modes].vi_cheight = vmode.v_cheight;
  968                 vesa_vmode[modes].vi_window = (vm_offset_t)vmode.v_waseg << 4;
  969                 /* XXX window B */
  970                 vesa_vmode[modes].vi_window_size = vmode.v_wsize * 1024;
  971                 vesa_vmode[modes].vi_window_gran = vmode.v_wgran * 1024;
  972                 if (vmode.v_modeattr & V_MODELFB)
  973                         vesa_vmode[modes].vi_buffer = vmode.v_lfb;
  974                 vesa_vmode[modes].vi_buffer_size = bsize;
  975                 vesa_vmode[modes].vi_mem_model =
  976                     vesa_translate_mmodel(vmode.v_memmodel);
  977                 switch (vesa_vmode[modes].vi_mem_model) {
  978                 case V_INFO_MM_DIRECT:
  979                         if ((vmode.v_modeattr & V_MODELFB) != 0 &&
  980                             vers >= 0x0300) {
  981                                 vesa_vmode[modes].vi_pixel_fields[0] =
  982                                     vmode.v_linredfieldpos;
  983                                 vesa_vmode[modes].vi_pixel_fields[1] =
  984                                     vmode.v_lingreenfieldpos;
  985                                 vesa_vmode[modes].vi_pixel_fields[2] =
  986                                     vmode.v_linbluefieldpos;
  987                                 vesa_vmode[modes].vi_pixel_fields[3] =
  988                                     vmode.v_linresfieldpos;
  989                                 vesa_vmode[modes].vi_pixel_fsizes[0] =
  990                                     vmode.v_linredmasksize;
  991                                 vesa_vmode[modes].vi_pixel_fsizes[1] =
  992                                     vmode.v_lingreenmasksize;
  993                                 vesa_vmode[modes].vi_pixel_fsizes[2] =
  994                                     vmode.v_linbluemasksize;
  995                                 vesa_vmode[modes].vi_pixel_fsizes[3] =
  996                                     vmode.v_linresmasksize;
  997                         } else {
  998                                 vesa_vmode[modes].vi_pixel_fields[0] =
  999                                     vmode.v_redfieldpos;
 1000                                 vesa_vmode[modes].vi_pixel_fields[1] =
 1001                                     vmode.v_greenfieldpos;
 1002                                 vesa_vmode[modes].vi_pixel_fields[2] =
 1003                                     vmode.v_bluefieldpos;
 1004                                 vesa_vmode[modes].vi_pixel_fields[3] =
 1005                                     vmode.v_resfieldpos;
 1006                                 vesa_vmode[modes].vi_pixel_fsizes[0] =
 1007                                     vmode.v_redmasksize;
 1008                                 vesa_vmode[modes].vi_pixel_fsizes[1] =
 1009                                     vmode.v_greenmasksize;
 1010                                 vesa_vmode[modes].vi_pixel_fsizes[2] =
 1011                                     vmode.v_bluemasksize;
 1012                                 vesa_vmode[modes].vi_pixel_fsizes[3] =
 1013                                     vmode.v_resmasksize;
 1014                         }
 1015                         /* FALLTHROUGH */
 1016                 case V_INFO_MM_PACKED:
 1017                         vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7) / 8;
 1018                         break;
 1019                 }
 1020                 vesa_vmode[modes].vi_flags =
 1021                     vesa_translate_flags(vmode.v_modeattr) | V_INFO_VESA;
 1022 
 1023                 ++modes;
 1024         }
 1025         vesa_vmode[modes].vi_mode = EOT;
 1026 
 1027         if (bootverbose)
 1028                 printf("VESA: %d mode(s) found\n", modes);
 1029 
 1030         if (modes == 0)
 1031                 goto fail;
 1032 
 1033         x86bios_free(vmbuf, sizeof(*buf));
 1034 
 1035         /* Probe supported save/restore states. */
 1036         for (i = 0; i < 4; i++)
 1037                 if (vesa_bios_state_buf_size(1 << i) > 0)
 1038                         vesa_state |= 1 << i;
 1039         if (vesa_state != 0)
 1040                 vesa_state_buf_size = vesa_bios_state_buf_size(vesa_state);
 1041         vesa_palette = x86bios_alloc(&vesa_palette_offs,
 1042             VESA_PALETTE_SIZE + vesa_state_buf_size, M_WAITOK);
 1043         if (vesa_state_buf_size > 0) {
 1044                 vesa_state_buf = vesa_palette + VESA_PALETTE_SIZE;
 1045                 vesa_state_buf_offs = vesa_palette_offs + VESA_PALETTE_SIZE;
 1046         }
 1047 
 1048         return (0);
 1049 
 1050 fail:
 1051         x86bios_free(vmbuf, sizeof(buf));
 1052         vesa_bios_uninit();
 1053         return (1);
 1054 }
 1055 
 1056 static void
 1057 vesa_bios_uninit(void)
 1058 {
 1059 
 1060         if (vesa_bios != NULL) {
 1061                 x86bios_set_intr(0x10, vesa_bios_int10);
 1062                 vesa_bios_offs = VESA_BIOS_OFFSET;
 1063                 x86bios_free(vesa_bios, vesa_bios_size);
 1064                 vesa_bios = NULL;
 1065         }
 1066         if (vesa_adp_info != NULL) {
 1067                 free(vesa_adp_info, M_DEVBUF);
 1068                 vesa_adp_info = NULL;
 1069         }
 1070         if (vesa_oemstr != NULL) {
 1071                 free(vesa_oemstr, M_DEVBUF);
 1072                 vesa_oemstr = NULL;
 1073         }
 1074         if (vesa_venderstr != NULL) {
 1075                 free(vesa_venderstr, M_DEVBUF);
 1076                 vesa_venderstr = NULL;
 1077         }
 1078         if (vesa_prodstr != NULL) {
 1079                 free(vesa_prodstr, M_DEVBUF);
 1080                 vesa_prodstr = NULL;
 1081         }
 1082         if (vesa_revstr != NULL) {
 1083                 free(vesa_revstr, M_DEVBUF);
 1084                 vesa_revstr = NULL;
 1085         }
 1086         if (vesa_vmode != NULL) {
 1087                 free(vesa_vmode, M_DEVBUF);
 1088                 vesa_vmode = NULL;
 1089         }
 1090         if (vesa_palette != NULL) {
 1091                 x86bios_free(vesa_palette,
 1092                     VESA_PALETTE_SIZE + vesa_state_buf_size);
 1093                 vesa_palette = NULL;
 1094         }
 1095 }
 1096 
 1097 static void
 1098 vesa_clear_modes(video_info_t *info, int color)
 1099 {
 1100         while (info->vi_mode != EOT) {
 1101                 if ((info->vi_flags & V_INFO_COLOR) != color)
 1102                         info->vi_mode = NA;
 1103                 ++info;
 1104         }
 1105 }
 1106 
 1107 /* entry points */
 1108 
 1109 static int
 1110 vesa_configure(int flags)
 1111 {
 1112         video_adapter_t *adp;
 1113         int adapters;
 1114         int error;
 1115         int i;
 1116 
 1117         if (vesa_init_done)
 1118                 return (0);
 1119         if (flags & VIO_PROBE_ONLY)
 1120                 return (0);
 1121 
 1122         /*
 1123          * If the VESA module has already been loaded, abort loading 
 1124          * the module this time.
 1125          */
 1126         for (i = 0; (adp = vid_get_adapter(i)) != NULL; ++i) {
 1127                 if (adp->va_flags & V_ADP_VESA)
 1128                         return (ENXIO);
 1129                 if (adp->va_type == KD_VGA)
 1130                         break;
 1131         }
 1132 
 1133         /*
 1134          * The VGA adapter is not found.  This is because either 
 1135          * 1) the VGA driver has not been initialized, or 2) the VGA card
 1136          * is not present.  If 1) is the case, we shall defer
 1137          * initialization for now and try again later.
 1138          */
 1139         if (adp == NULL) {
 1140                 vga_sub_configure = vesa_configure;
 1141                 return (ENODEV);
 1142         }
 1143 
 1144         /* count number of registered adapters */
 1145         for (++i; vid_get_adapter(i) != NULL; ++i)
 1146                 ;
 1147         adapters = i;
 1148 
 1149         /* call VESA BIOS */
 1150         vesa_adp = adp;
 1151         if (vesa_bios_init()) {
 1152                 vesa_adp = NULL;
 1153                 return (ENXIO);
 1154         }
 1155         vesa_adp->va_flags |= V_ADP_VESA;
 1156 
 1157         /* remove conflicting modes if we have more than one adapter */
 1158         if (adapters > 1) {
 1159                 vesa_clear_modes(vesa_vmode,
 1160                                  (vesa_adp->va_flags & V_ADP_COLOR) ? 
 1161                                      V_INFO_COLOR : 0);
 1162         }
 1163 
 1164         if ((error = vesa_load_ioctl()) == 0) {
 1165                 prevvidsw = vidsw[vesa_adp->va_index];
 1166                 vidsw[vesa_adp->va_index] = &vesavidsw;
 1167                 vesa_init_done = TRUE;
 1168         } else {
 1169                 vesa_adp = NULL;
 1170                 return (error);
 1171         }
 1172 
 1173         return (0);
 1174 }
 1175 
 1176 #if 0
 1177 static int
 1178 vesa_nop(void)
 1179 {
 1180 
 1181         return (0);
 1182 }
 1183 #endif
 1184 
 1185 static int
 1186 vesa_error(void)
 1187 {
 1188 
 1189         return (1);
 1190 }
 1191 
 1192 static int
 1193 vesa_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
 1194 {
 1195 
 1196         return ((*prevvidsw->probe)(unit, adpp, arg, flags));
 1197 }
 1198 
 1199 static int
 1200 vesa_init(int unit, video_adapter_t *adp, int flags)
 1201 {
 1202 
 1203         return ((*prevvidsw->init)(unit, adp, flags));
 1204 }
 1205 
 1206 static int
 1207 vesa_get_info(video_adapter_t *adp, int mode, video_info_t *info)
 1208 {
 1209         int i;
 1210 
 1211         if ((*prevvidsw->get_info)(adp, mode, info) == 0)
 1212                 return (0);
 1213 
 1214         if (adp != vesa_adp)
 1215                 return (1);
 1216 
 1217         mode = vesa_map_gen_mode_num(vesa_adp->va_type, 
 1218                                      vesa_adp->va_flags & V_ADP_COLOR, mode);
 1219         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
 1220                 if (vesa_vmode[i].vi_mode == NA)
 1221                         continue;
 1222                 if (vesa_vmode[i].vi_mode == mode) {
 1223                         *info = vesa_vmode[i];
 1224                         return (0);
 1225                 }
 1226         }
 1227         return (1);
 1228 }
 1229 
 1230 static int
 1231 vesa_query_mode(video_adapter_t *adp, video_info_t *info)
 1232 {
 1233         int i;
 1234 
 1235         if ((*prevvidsw->query_mode)(adp, info) == 0)
 1236                 return (0);
 1237         if (adp != vesa_adp)
 1238                 return (ENODEV);
 1239 
 1240         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
 1241                 if ((info->vi_width != 0)
 1242                     && (info->vi_width != vesa_vmode[i].vi_width))
 1243                         continue;
 1244                 if ((info->vi_height != 0)
 1245                     && (info->vi_height != vesa_vmode[i].vi_height))
 1246                         continue;
 1247                 if ((info->vi_cwidth != 0)
 1248                     && (info->vi_cwidth != vesa_vmode[i].vi_cwidth))
 1249                         continue;
 1250                 if ((info->vi_cheight != 0)
 1251                     && (info->vi_cheight != vesa_vmode[i].vi_cheight))
 1252                         continue;
 1253                 if ((info->vi_depth != 0)
 1254                     && (info->vi_depth != vesa_vmode[i].vi_depth))
 1255                         continue;
 1256                 if ((info->vi_planes != 0)
 1257                     && (info->vi_planes != vesa_vmode[i].vi_planes))
 1258                         continue;
 1259                 /* pixel format, memory model */
 1260                 if ((info->vi_flags != 0)
 1261                     && (info->vi_flags != vesa_vmode[i].vi_flags))
 1262                         continue;
 1263                 *info = vesa_vmode[i];
 1264                 return (0);
 1265         }
 1266         return (ENODEV);
 1267 }
 1268 
 1269 static int
 1270 vesa_set_mode(video_adapter_t *adp, int mode)
 1271 {
 1272         video_info_t info;
 1273 
 1274         if (adp != vesa_adp)
 1275                 return ((*prevvidsw->set_mode)(adp, mode));
 1276 
 1277         mode = vesa_map_gen_mode_num(adp->va_type, 
 1278                                      adp->va_flags & V_ADP_COLOR, mode);
 1279 #if VESA_DEBUG > 0
 1280         printf("VESA: set_mode(): %d(%x) -> %d(%x)\n",
 1281                 adp->va_mode, adp->va_mode, mode, mode);
 1282 #endif
 1283         /* 
 1284          * If the current mode is a VESA mode and the new mode is not,
 1285          * restore the state of the adapter first by setting one of the
 1286          * standard VGA mode, so that non-standard, extended SVGA registers 
 1287          * are set to the state compatible with the standard VGA modes. 
 1288          * Otherwise (*prevvidsw->set_mode)() may not be able to set up 
 1289          * the new mode correctly.
 1290          */
 1291         if (VESA_MODE(adp->va_mode)) {
 1292                 if (!VESA_MODE(mode) &&
 1293                     (*prevvidsw->get_info)(adp, mode, &info) == 0) {
 1294                         if ((adp->va_flags & V_ADP_DAC8) != 0) {
 1295                                 vesa_bios_set_dac(6);
 1296                                 adp->va_flags &= ~V_ADP_DAC8;
 1297                         }
 1298                         int10_set_mode(adp->va_initial_bios_mode);
 1299                         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1300                                 pmap_unmapdev(adp->va_buffer,
 1301                                     vesa_adp_info->v_memsize * 64 * 1024);
 1302                         /* 
 1303                          * Once (*prevvidsw->get_info)() succeeded, 
 1304                          * (*prevvidsw->set_mode)() below won't fail...
 1305                          */
 1306                 }
 1307         }
 1308 
 1309         /* we may not need to handle this mode after all... */
 1310         if (!VESA_MODE(mode) && (*prevvidsw->set_mode)(adp, mode) == 0)
 1311                 return (0);
 1312 
 1313         /* is the new mode supported? */
 1314         if (vesa_get_info(adp, mode, &info))
 1315                 return (1);
 1316         /* assert(VESA_MODE(mode)); */
 1317 
 1318 #if VESA_DEBUG > 0
 1319         printf("VESA: about to set a VESA mode...\n");
 1320 #endif
 1321         /* don't use the linear frame buffer for text modes. XXX */
 1322         if (!(info.vi_flags & V_INFO_GRAPHICS))
 1323                 info.vi_flags &= ~V_INFO_LINEAR;
 1324 
 1325         if ((info.vi_flags & V_INFO_LINEAR) != 0)
 1326                 mode |= 0x4000;
 1327         if (vesa_bios_set_mode(mode | 0x8000))
 1328                 return (1);
 1329 
 1330         /* Palette format is reset by the above VBE function call. */
 1331         adp->va_flags &= ~V_ADP_DAC8;
 1332 
 1333         if ((vesa_adp_info->v_flags & V_DAC8) != 0 &&
 1334             (info.vi_flags & V_INFO_GRAPHICS) != 0 &&
 1335             vesa_bios_set_dac(8) > 6)
 1336                 adp->va_flags |= V_ADP_DAC8;
 1337 
 1338         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1339                 pmap_unmapdev(adp->va_buffer,
 1340                     vesa_adp_info->v_memsize * 64 * 1024);
 1341 
 1342 #if VESA_DEBUG > 0
 1343         printf("VESA: mode set!\n");
 1344 #endif
 1345         vesa_adp->va_mode = mode & 0x1ff;       /* Mode number is 9-bit. */
 1346         vesa_adp->va_flags &= ~V_ADP_COLOR;
 1347         vesa_adp->va_flags |= 
 1348                 (info.vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
 1349         vesa_adp->va_crtc_addr =
 1350                 (vesa_adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
 1351 
 1352         vesa_adp->va_line_width = info.vi_buffer_size / info.vi_height;
 1353         if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
 1354                 vesa_adp->va_line_width /= info.vi_planes;
 1355 
 1356 #ifdef MODE_TABLE_BROKEN
 1357         /* If VBE function returns bigger bytes per scan line, use it. */
 1358         {
 1359                 int bpsl = vesa_bios_get_line_length();
 1360                 if (bpsl > vesa_adp->va_line_width) {
 1361                         vesa_adp->va_line_width = bpsl;
 1362                         info.vi_buffer_size = bpsl * info.vi_height;
 1363                         if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
 1364                                 info.vi_buffer_size *= info.vi_planes;
 1365                 }
 1366         }
 1367 #endif
 1368 
 1369         if (info.vi_flags & V_INFO_LINEAR) {
 1370 #if VESA_DEBUG > 1
 1371                 printf("VESA: setting up LFB\n");
 1372 #endif
 1373                 vesa_adp->va_buffer =
 1374                     (vm_offset_t)pmap_mapdev_attr(info.vi_buffer,
 1375                     vesa_adp_info->v_memsize * 64 * 1024, PAT_WRITE_COMBINING);
 1376                 vesa_adp->va_window = vesa_adp->va_buffer;
 1377                 vesa_adp->va_window_size = info.vi_buffer_size / info.vi_planes;
 1378                 vesa_adp->va_window_gran = info.vi_buffer_size / info.vi_planes;
 1379         } else {
 1380                 vesa_adp->va_buffer = 0;
 1381                 vesa_adp->va_window = (vm_offset_t)x86bios_offset(info.vi_window);
 1382                 vesa_adp->va_window_size = info.vi_window_size;
 1383                 vesa_adp->va_window_gran = info.vi_window_gran;
 1384         }
 1385         vesa_adp->va_buffer_size = info.vi_buffer_size;
 1386         vesa_adp->va_window_orig = 0;
 1387         vesa_adp->va_disp_start.x = 0;
 1388         vesa_adp->va_disp_start.y = 0;
 1389 #if VESA_DEBUG > 0
 1390         printf("vesa_set_mode(): vi_width:%d, line_width:%d\n",
 1391                info.vi_width, vesa_adp->va_line_width);
 1392 #endif
 1393         bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
 1394 
 1395         /* move hardware cursor out of the way */
 1396         (*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
 1397 
 1398         return (0);
 1399 }
 1400 
 1401 static int
 1402 vesa_save_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
 1403                u_char *data, int ch, int count)
 1404 {
 1405 
 1406         return ((*prevvidsw->save_font)(adp, page, fontsize, fontwidth, data,
 1407             ch, count));
 1408 }
 1409 
 1410 static int
 1411 vesa_load_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
 1412                u_char *data, int ch, int count)
 1413 {
 1414 
 1415         return ((*prevvidsw->load_font)(adp, page, fontsize, fontwidth, data,
 1416                 ch, count));
 1417 }
 1418 
 1419 static int
 1420 vesa_show_font(video_adapter_t *adp, int page)
 1421 {
 1422 
 1423         return ((*prevvidsw->show_font)(adp, page));
 1424 }
 1425 
 1426 static int
 1427 vesa_save_palette(video_adapter_t *adp, u_char *palette)
 1428 {
 1429         int bits;
 1430 
 1431         if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
 1432                 bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1433                 if (vesa_bios_save_palette(0, 256, palette, bits) == 0)
 1434                         return (0);
 1435         }
 1436 
 1437         return ((*prevvidsw->save_palette)(adp, palette));
 1438 }
 1439 
 1440 static int
 1441 vesa_load_palette(video_adapter_t *adp, u_char *palette)
 1442 {
 1443         int bits;
 1444 
 1445         if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
 1446                 bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1447                 if (vesa_bios_load_palette(0, 256, palette, bits) == 0)
 1448                         return (0);
 1449         }
 1450 
 1451         return ((*prevvidsw->load_palette)(adp, palette));
 1452 }
 1453 
 1454 static int
 1455 vesa_set_border(video_adapter_t *adp, int color)
 1456 {
 1457 
 1458         return ((*prevvidsw->set_border)(adp, color));
 1459 }
 1460 
 1461 static int
 1462 vesa_save_state(video_adapter_t *adp, void *p, size_t size)
 1463 {
 1464         vm_offset_t buf;
 1465         size_t bsize;
 1466 
 1467         if (adp != vesa_adp || vesa_state_buf_size == 0)
 1468                 return ((*prevvidsw->save_state)(adp, p, size));
 1469 
 1470         if (size == 0)
 1471                 return (offsetof(adp_state_t, regs) + vesa_state_buf_size);
 1472         if (size < (offsetof(adp_state_t, regs) + vesa_state_buf_size))
 1473                 return (EINVAL);
 1474 
 1475         buf = adp->va_buffer;
 1476         if (buf != 0) {
 1477                 bsize = adp->va_buffer_size;
 1478                 vesa_vmem_buf = malloc(bsize, M_DEVBUF, M_NOWAIT);
 1479                 if (vesa_vmem_buf != NULL)
 1480                         bcopy((void *)buf, vesa_vmem_buf, bsize);
 1481         } else
 1482                 vesa_vmem_buf = NULL;
 1483         ((adp_state_t *)p)->sig = V_STATE_SIG;
 1484         bzero(((adp_state_t *)p)->regs, vesa_state_buf_size);
 1485         return (vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs));
 1486 }
 1487 
 1488 static int
 1489 vesa_load_state(video_adapter_t *adp, void *p)
 1490 {
 1491         vm_offset_t buf;
 1492         size_t bsize;
 1493         int mode;
 1494 
 1495         if (adp != vesa_adp)
 1496                 return ((*prevvidsw->load_state)(adp, p));
 1497 
 1498         /* Try BIOS POST to restore a sane state. */
 1499         (void)vesa_bios_post();
 1500         bsize = adp->va_buffer_size;
 1501         mode = adp->va_mode;
 1502         (void)vesa_set_mode(adp, adp->va_initial_mode);
 1503         if (mode != adp->va_initial_mode)
 1504                 (void)vesa_set_mode(adp, mode);
 1505 
 1506         if (((adp_state_t *)p)->sig != V_STATE_SIG)
 1507                 return ((*prevvidsw->load_state)(adp, p));
 1508         if (vesa_vmem_buf != NULL) {
 1509                 buf = adp->va_buffer;
 1510                 if (buf != 0)
 1511                         bcopy(vesa_vmem_buf, (void *)buf, bsize);
 1512                 free(vesa_vmem_buf, M_DEVBUF);
 1513         }
 1514         return (vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs));
 1515 }
 1516 
 1517 #if 0
 1518 static int
 1519 vesa_get_origin(video_adapter_t *adp, off_t *offset)
 1520 {
 1521         x86regs_t regs;
 1522 
 1523         x86bios_init_regs(&regs);
 1524         regs.R_AX = 0x4f05;
 1525         regs.R_BL = 0x10;
 1526 
 1527         x86bios_intr(&regs, 0x10);
 1528 
 1529         if (regs.R_AX != 0x004f)
 1530                 return (1);
 1531         *offset = regs.DX * adp->va_window_gran;
 1532 
 1533         return (0);
 1534 }
 1535 #endif
 1536 
 1537 static int
 1538 vesa_set_origin(video_adapter_t *adp, off_t offset)
 1539 {
 1540         x86regs_t regs;
 1541 
 1542         /*
 1543          * This function should return as quickly as possible to 
 1544          * maintain good performance of the system. For this reason,
 1545          * error checking is kept minimal and let the VESA BIOS to 
 1546          * detect error.
 1547          */
 1548         if (adp != vesa_adp) 
 1549                 return ((*prevvidsw->set_win_org)(adp, offset));
 1550 
 1551         /* if this is a linear frame buffer, do nothing */
 1552         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1553                 return (0);
 1554         /* XXX */
 1555         if (adp->va_window_gran == 0)
 1556                 return (1);
 1557 
 1558         x86bios_init_regs(&regs);
 1559         regs.R_AX = 0x4f05;
 1560         regs.R_DX = offset / adp->va_window_gran;
 1561         
 1562         x86bios_intr(&regs, 0x10);
 1563 
 1564         if (regs.R_AX != 0x004f)
 1565                 return (1);
 1566 
 1567         x86bios_init_regs(&regs);
 1568         regs.R_AX = 0x4f05;
 1569         regs.R_BL = 1;
 1570         regs.R_DX = offset / adp->va_window_gran;
 1571         x86bios_intr(&regs, 0x10);
 1572 
 1573         adp->va_window_orig = (offset/adp->va_window_gran)*adp->va_window_gran;
 1574         return (0);                     /* XXX */
 1575 }
 1576 
 1577 static int
 1578 vesa_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
 1579 {
 1580 
 1581         return ((*prevvidsw->read_hw_cursor)(adp, col, row));
 1582 }
 1583 
 1584 static int
 1585 vesa_set_hw_cursor(video_adapter_t *adp, int col, int row)
 1586 {
 1587 
 1588         return ((*prevvidsw->set_hw_cursor)(adp, col, row));
 1589 }
 1590 
 1591 static int
 1592 vesa_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
 1593                          int celsize, int blink)
 1594 {
 1595 
 1596         return ((*prevvidsw->set_hw_cursor_shape)(adp, base, height, celsize,
 1597             blink));
 1598 }
 1599 
 1600 static int
 1601 vesa_blank_display(video_adapter_t *adp, int mode) 
 1602 {
 1603 
 1604         /* XXX: use VESA DPMS */
 1605         return ((*prevvidsw->blank_display)(adp, mode));
 1606 }
 1607 
 1608 static int
 1609 vesa_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
 1610           int prot, vm_memattr_t *memattr)
 1611 {
 1612 
 1613 #if VESA_DEBUG > 0
 1614         printf("vesa_mmap(): window:0x%tx, buffer:0x%tx, offset:0x%jx\n", 
 1615                adp->va_info.vi_window, adp->va_info.vi_buffer, offset);
 1616 #endif
 1617 
 1618         if ((adp == vesa_adp) &&
 1619             (adp->va_info.vi_flags & V_INFO_LINEAR) != 0) {
 1620                 /* va_window_size == va_buffer_size/vi_planes */
 1621                 /* XXX: is this correct? */
 1622                 if (offset > adp->va_window_size - PAGE_SIZE)
 1623                         return (-1);
 1624                 *paddr = adp->va_info.vi_buffer + offset;
 1625                 return (0);
 1626         }
 1627         return ((*prevvidsw->mmap)(adp, offset, paddr, prot, memattr));
 1628 }
 1629 
 1630 static int
 1631 vesa_clear(video_adapter_t *adp)
 1632 {
 1633 
 1634         return ((*prevvidsw->clear)(adp));
 1635 }
 1636 
 1637 static int
 1638 vesa_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 1639 {
 1640 
 1641         return ((*prevvidsw->fill_rect)(adp, val, x, y, cx, cy));
 1642 }
 1643 
 1644 static int
 1645 vesa_bitblt(video_adapter_t *adp,...)
 1646 {
 1647 
 1648         /* FIXME */
 1649         return (1);
 1650 }
 1651 
 1652 static int
 1653 get_palette(video_adapter_t *adp, int base, int count,
 1654             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1655 {
 1656         u_char *r;
 1657         u_char *g;
 1658         u_char *b;
 1659         int bits;
 1660         int error;
 1661 
 1662         if (base < 0 || base >= 256 || count < 0 || count > 256)
 1663                 return (1);
 1664         if ((base + count) > 256)
 1665                 return (1);
 1666         if (!VESA_MODE(adp->va_mode))
 1667                 return (1);
 1668 
 1669         bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1670         r = malloc(count * 3, M_DEVBUF, M_WAITOK);
 1671         g = r + count;
 1672         b = g + count;
 1673         error = vesa_bios_save_palette2(base, count, r, g, b, bits);
 1674         if (error == 0) {
 1675                 copyout(r, red, count);
 1676                 copyout(g, green, count);
 1677                 copyout(b, blue, count);
 1678                 if (trans != NULL) {
 1679                         bzero(r, count);
 1680                         copyout(r, trans, count);
 1681                 }
 1682         }
 1683         free(r, M_DEVBUF);
 1684 
 1685         return (error);
 1686 }
 1687 
 1688 static int
 1689 set_palette(video_adapter_t *adp, int base, int count,
 1690             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1691 {
 1692         u_char *r;
 1693         u_char *g;
 1694         u_char *b;
 1695         int bits;
 1696         int error;
 1697 
 1698         if (base < 0 || base >= 256 || count < 0 || count > 256)
 1699                 return (1);
 1700         if ((base + count) > 256)
 1701                 return (1);
 1702         if (!VESA_MODE(adp->va_mode))
 1703                 return (1);
 1704 
 1705         bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1706         r = malloc(count * 3, M_DEVBUF, M_WAITOK);
 1707         g = r + count;
 1708         b = g + count;
 1709         copyin(red, r, count);
 1710         copyin(green, g, count);
 1711         copyin(blue, b, count);
 1712 
 1713         error = vesa_bios_load_palette2(base, count, r, g, b, bits);
 1714         free(r, M_DEVBUF);
 1715 
 1716         return (error);
 1717 }
 1718 
 1719 static int
 1720 vesa_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 1721 {
 1722         int bytes;
 1723 
 1724         if (adp != vesa_adp)
 1725                 return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1726 
 1727         switch (cmd) {
 1728         case FBIO_SETWINORG:    /* set frame buffer window origin */
 1729                 if (!VESA_MODE(adp->va_mode))
 1730                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1731                 return (vesa_set_origin(adp, *(off_t *)arg) ? ENODEV : 0);
 1732 
 1733         case FBIO_SETDISPSTART: /* set display start address */
 1734                 if (!VESA_MODE(adp->va_mode))
 1735                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1736                 if (vesa_bios_set_start(((video_display_start_t *)arg)->x,
 1737                                         ((video_display_start_t *)arg)->y))
 1738                         return (ENODEV);
 1739                 adp->va_disp_start.x = ((video_display_start_t *)arg)->x;
 1740                 adp->va_disp_start.y = ((video_display_start_t *)arg)->y;
 1741                 return (0);
 1742 
 1743         case FBIO_SETLINEWIDTH: /* set line length in pixel */
 1744                 if (!VESA_MODE(adp->va_mode))
 1745                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1746                 if (vesa_bios_set_line_length(*(u_int *)arg, &bytes, NULL))
 1747                         return (ENODEV);
 1748                 adp->va_line_width = bytes;
 1749 #if VESA_DEBUG > 1
 1750                 printf("new line width:%d\n", adp->va_line_width);
 1751 #endif
 1752                 return (0);
 1753 
 1754         case FBIO_GETPALETTE:   /* get color palette */
 1755                 if (get_palette(adp, ((video_color_palette_t *)arg)->index,
 1756                                 ((video_color_palette_t *)arg)->count,
 1757                                 ((video_color_palette_t *)arg)->red,
 1758                                 ((video_color_palette_t *)arg)->green,
 1759                                 ((video_color_palette_t *)arg)->blue,
 1760                                 ((video_color_palette_t *)arg)->transparent))
 1761                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1762                 return (0);
 1763 
 1764 
 1765         case FBIO_SETPALETTE:   /* set color palette */
 1766                 if (set_palette(adp, ((video_color_palette_t *)arg)->index,
 1767                                 ((video_color_palette_t *)arg)->count,
 1768                                 ((video_color_palette_t *)arg)->red,
 1769                                 ((video_color_palette_t *)arg)->green,
 1770                                 ((video_color_palette_t *)arg)->blue,
 1771                                 ((video_color_palette_t *)arg)->transparent))
 1772                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1773                 return (0);
 1774 
 1775         case FBIOGETCMAP:       /* get color palette */
 1776                 if (get_palette(adp, ((struct fbcmap *)arg)->index,
 1777                                 ((struct fbcmap *)arg)->count,
 1778                                 ((struct fbcmap *)arg)->red,
 1779                                 ((struct fbcmap *)arg)->green,
 1780                                 ((struct fbcmap *)arg)->blue, NULL))
 1781                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1782                 return (0);
 1783 
 1784         case FBIOPUTCMAP:       /* set color palette */
 1785                 if (set_palette(adp, ((struct fbcmap *)arg)->index,
 1786                                 ((struct fbcmap *)arg)->count,
 1787                                 ((struct fbcmap *)arg)->red,
 1788                                 ((struct fbcmap *)arg)->green,
 1789                                 ((struct fbcmap *)arg)->blue, NULL))
 1790                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1791                 return (0);
 1792 
 1793         default:
 1794                 return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1795         }
 1796 }
 1797 
 1798 static int
 1799 vesa_diag(video_adapter_t *adp, int level)
 1800 {
 1801         int error;
 1802 
 1803         /* call the previous handler first */
 1804         error = (*prevvidsw->diag)(adp, level);
 1805         if (error)
 1806                 return (error);
 1807 
 1808         if (adp != vesa_adp)
 1809                 return (1);
 1810 
 1811         if (level <= 0)
 1812                 return (0);
 1813 
 1814         return (0);
 1815 }
 1816 
 1817 static int
 1818 vesa_bios_info(int level)
 1819 {
 1820 #if VESA_DEBUG > 1
 1821         struct vesa_mode vmode;
 1822         int i;
 1823 #endif
 1824         uint16_t vers;
 1825 
 1826         vers = vesa_adp_info->v_version;
 1827 
 1828         if (bootverbose) {
 1829                 /* general adapter information */
 1830                 printf(
 1831         "VESA: v%d.%d, %dk memory, flags:0x%x, mode table:%p (%x)\n", 
 1832                     (vers >> 12) * 10 + ((vers & 0x0f00) >> 8),
 1833                     ((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f),
 1834                     vesa_adp_info->v_memsize * 64, vesa_adp_info->v_flags,
 1835                     vesa_vmodetab, vesa_adp_info->v_modetable);
 1836 
 1837                 /* OEM string */
 1838                 if (vesa_oemstr != NULL)
 1839                         printf("VESA: %s\n", vesa_oemstr);
 1840         }
 1841 
 1842         if (level <= 0)
 1843                 return (0);
 1844 
 1845         if (vers >= 0x0200 && bootverbose) {
 1846                 /* vender name, product name, product revision */
 1847                 printf("VESA: %s %s %s\n",
 1848                         (vesa_venderstr != NULL) ? vesa_venderstr : "unknown",
 1849                         (vesa_prodstr != NULL) ? vesa_prodstr : "unknown",
 1850                         (vesa_revstr != NULL) ? vesa_revstr : "?");
 1851         }
 1852 
 1853 #if VESA_DEBUG > 1
 1854         /* mode information */
 1855         for (i = 0;
 1856                 (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
 1857                 && (vesa_vmodetab[i] != 0xffff); ++i) {
 1858                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_NOWAIT))
 1859                         continue;
 1860 
 1861                 /* print something for diagnostic purpose */
 1862                 printf("VESA: mode:0x%03x, flags:0x%04x", 
 1863                        vesa_vmodetab[i], vmode.v_modeattr);
 1864                 if (vmode.v_modeattr & V_MODEOPTINFO) {
 1865                         if (vmode.v_modeattr & V_MODEGRAPHICS) {
 1866                                 printf(", G %dx%dx%d %d, ", 
 1867                                        vmode.v_width, vmode.v_height,
 1868                                        vmode.v_bpp, vmode.v_planes);
 1869                         } else {
 1870                                 printf(", T %dx%d, ", 
 1871                                        vmode.v_width, vmode.v_height);
 1872                         }
 1873                         printf("font:%dx%d, ", 
 1874                                vmode.v_cwidth, vmode.v_cheight);
 1875                         printf("pages:%d, mem:%d",
 1876                                vmode.v_ipages + 1, vmode.v_memmodel);
 1877                 }
 1878                 if (vmode.v_modeattr & V_MODELFB) {
 1879                         printf("\nVESA: LFB:0x%x, off:0x%x, off_size:0x%x", 
 1880                                vmode.v_lfb, vmode.v_offscreen,
 1881                                vmode.v_offscreensize*1024);
 1882                 }
 1883                 printf("\n");
 1884                 printf("VESA: window A:0x%x (%x), window B:0x%x (%x), ",
 1885                        vmode.v_waseg, vmode.v_waattr,
 1886                        vmode.v_wbseg, vmode.v_wbattr);
 1887                 printf("size:%dk, gran:%dk\n",
 1888                        vmode.v_wsize, vmode.v_wgran);
 1889         }
 1890 #endif /* VESA_DEBUG > 1 */
 1891 
 1892         return (0);
 1893 }
 1894 
 1895 /* module loading */
 1896 
 1897 static int
 1898 vesa_load(void)
 1899 {
 1900         int error;
 1901 
 1902         if (vesa_init_done)
 1903                 return (0);
 1904 
 1905         mtx_init(&vesa_lock, "VESA lock", NULL, MTX_DEF);
 1906 
 1907         /* locate a VGA adapter */
 1908         vesa_adp = NULL;
 1909         error = vesa_configure(0);
 1910 
 1911         if (error == 0)
 1912                 vesa_bios_info(bootverbose);
 1913 
 1914         return (error);
 1915 }
 1916 
 1917 static int
 1918 vesa_unload(void)
 1919 {
 1920         u_char palette[256*3];
 1921         int error;
 1922 
 1923         /* if the adapter is currently in a VESA mode, don't unload */
 1924         if ((vesa_adp != NULL) && VESA_MODE(vesa_adp->va_mode))
 1925                 return (EBUSY);
 1926         /* 
 1927          * FIXME: if there is at least one vty which is in a VESA mode,
 1928          * we shouldn't be unloading! XXX
 1929          */
 1930 
 1931         if ((error = vesa_unload_ioctl()) == 0) {
 1932                 if (vesa_adp != NULL) {
 1933                         if ((vesa_adp->va_flags & V_ADP_DAC8) != 0) {
 1934                                 vesa_bios_save_palette(0, 256, palette, 8);
 1935                                 vesa_bios_set_dac(6);
 1936                                 vesa_adp->va_flags &= ~V_ADP_DAC8;
 1937                                 vesa_bios_load_palette(0, 256, palette, 6);
 1938                         }
 1939                         vesa_adp->va_flags &= ~V_ADP_VESA;
 1940                         vidsw[vesa_adp->va_index] = prevvidsw;
 1941                 }
 1942         }
 1943 
 1944         vesa_bios_uninit();
 1945         mtx_destroy(&vesa_lock);
 1946 
 1947         return (error);
 1948 }
 1949 
 1950 static int
 1951 vesa_mod_event(module_t mod, int type, void *data)
 1952 {
 1953 
 1954         switch (type) {
 1955         case MOD_LOAD:
 1956                 return (vesa_load());
 1957         case MOD_UNLOAD:
 1958                 return (vesa_unload());
 1959         }
 1960         return (EOPNOTSUPP);
 1961 }
 1962 
 1963 static moduledata_t vesa_mod = {
 1964         "vesa",
 1965         vesa_mod_event,
 1966         NULL,
 1967 };
 1968 
 1969 DECLARE_MODULE(vesa, vesa_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
 1970 MODULE_DEPEND(vesa, x86bios, 1, 1, 1);
 1971 
 1972 #endif  /* VGA_NO_MODE_CHANGE */

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