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) 2009-2013 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/11.1/sys/dev/fb/vesa.c 317500 2017-04-27 12:12:33Z kib $");
   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 MTX_SYSINIT(vesa_lock, &vesa_lock, "VESA lock", MTX_DEF);
   83 
   84 static int vesa_state;
   85 static void *vesa_state_buf;
   86 static uint32_t vesa_state_buf_offs;
   87 static size_t vesa_state_buf_size;
   88 
   89 static u_char *vesa_palette;
   90 static uint32_t vesa_palette_offs;
   91 
   92 static void *vesa_vmem_buf;
   93 static size_t vesa_vmem_max;
   94 
   95 static void *vesa_bios;
   96 static uint32_t vesa_bios_offs;
   97 static uint32_t vesa_bios_int10;
   98 static size_t vesa_bios_size;
   99 
  100 /* VESA video adapter */
  101 static video_adapter_t *vesa_adp;
  102 
  103 static SYSCTL_NODE(_debug, OID_AUTO, vesa, CTLFLAG_RD, NULL, "VESA debugging");
  104 static int vesa_shadow_rom;
  105 SYSCTL_INT(_debug_vesa, OID_AUTO, shadow_rom, CTLFLAG_RDTUN, &vesa_shadow_rom,
  106     0, "Enable video BIOS shadow");
  107 
  108 /* VESA functions */
  109 #if 0
  110 static int                      vesa_nop(void);
  111 #endif
  112 static int                      vesa_error(void);
  113 static vi_probe_t               vesa_probe;
  114 static vi_init_t                vesa_init;
  115 static vi_get_info_t            vesa_get_info;
  116 static vi_query_mode_t          vesa_query_mode;
  117 static vi_set_mode_t            vesa_set_mode;
  118 static vi_save_font_t           vesa_save_font;
  119 static vi_load_font_t           vesa_load_font;
  120 static vi_show_font_t           vesa_show_font;
  121 static vi_save_palette_t        vesa_save_palette;
  122 static vi_load_palette_t        vesa_load_palette;
  123 static vi_set_border_t          vesa_set_border;
  124 static vi_save_state_t          vesa_save_state;
  125 static vi_load_state_t          vesa_load_state;
  126 static vi_set_win_org_t         vesa_set_origin;
  127 static vi_read_hw_cursor_t      vesa_read_hw_cursor;
  128 static vi_set_hw_cursor_t       vesa_set_hw_cursor;
  129 static vi_set_hw_cursor_shape_t vesa_set_hw_cursor_shape;
  130 static vi_blank_display_t       vesa_blank_display;
  131 static vi_mmap_t                vesa_mmap;
  132 static vi_ioctl_t               vesa_ioctl;
  133 static vi_clear_t               vesa_clear;
  134 static vi_fill_rect_t           vesa_fill_rect;
  135 static vi_bitblt_t              vesa_bitblt;
  136 static vi_diag_t                vesa_diag;
  137 static int                      vesa_bios_info(int level);
  138 
  139 static video_switch_t vesavidsw = {
  140         vesa_probe,
  141         vesa_init,
  142         vesa_get_info,
  143         vesa_query_mode,
  144         vesa_set_mode,
  145         vesa_save_font,
  146         vesa_load_font,
  147         vesa_show_font,
  148         vesa_save_palette,
  149         vesa_load_palette,
  150         vesa_set_border,
  151         vesa_save_state,
  152         vesa_load_state,
  153         vesa_set_origin,
  154         vesa_read_hw_cursor,
  155         vesa_set_hw_cursor,
  156         vesa_set_hw_cursor_shape,
  157         vesa_blank_display,
  158         vesa_mmap,
  159         vesa_ioctl,
  160         vesa_clear,
  161         vesa_fill_rect,
  162         vesa_bitblt,
  163         vesa_error,
  164         vesa_error,
  165         vesa_diag,
  166 };
  167 
  168 static video_switch_t *prevvidsw;
  169 
  170 /* VESA BIOS video modes */
  171 #define VESA_MAXMODES   64
  172 #define EOT             (-1)
  173 #define NA              (-2)
  174 
  175 #define MODE_TABLE_DELTA 8
  176 
  177 static int vesa_vmode_max;
  178 static video_info_t *vesa_vmode;
  179 
  180 static int vesa_init_done;
  181 static struct vesa_info *vesa_adp_info;
  182 static u_int16_t *vesa_vmodetab;
  183 static char *vesa_oemstr;
  184 static char *vesa_venderstr;
  185 static char *vesa_prodstr;
  186 static char *vesa_revstr;
  187 
  188 /* local macros and functions */
  189 #define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
  190 
  191 static int int10_set_mode(int mode);
  192 static int vesa_bios_post(void);
  193 static int vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags);
  194 static int vesa_bios_set_mode(int mode);
  195 #if 0
  196 static int vesa_bios_get_dac(void);
  197 #endif
  198 static int vesa_bios_set_dac(int bits);
  199 static int vesa_bios_save_palette(int start, int colors, u_char *palette,
  200                                   int bits);
  201 static int vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g,
  202                                    u_char *b, int bits);
  203 static int vesa_bios_load_palette(int start, int colors, u_char *palette,
  204                                   int bits);
  205 static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
  206                                    u_char *b, int bits);
  207 #define STATE_SIZE      0
  208 #define STATE_SAVE      1
  209 #define STATE_LOAD      2
  210 static size_t vesa_bios_state_buf_size(int);
  211 static int vesa_bios_save_restore(int code, void *p);
  212 #ifdef MODE_TABLE_BROKEN
  213 static int vesa_bios_get_line_length(void);
  214 #endif
  215 static int vesa_bios_set_line_length(int pixel, int *bytes, int *lines);
  216 #if 0
  217 static int vesa_bios_get_start(int *x, int *y);
  218 #endif
  219 static int vesa_bios_set_start(int x, int y);
  220 static int vesa_map_gen_mode_num(int type, int color, int mode);
  221 static int vesa_translate_flags(u_int16_t vflags);
  222 static int vesa_translate_mmodel(u_int8_t vmodel);
  223 static int vesa_get_bpscanline(struct vesa_mode *vmode);
  224 static int vesa_bios_init(void);
  225 static void vesa_bios_uninit(void);
  226 static void vesa_clear_modes(video_info_t *info, int color);
  227 
  228 #if 0
  229 static int vesa_get_origin(video_adapter_t *adp, off_t *offset);
  230 #endif
  231 
  232 /* INT 10 BIOS calls */
  233 static int
  234 int10_set_mode(int mode)
  235 {
  236         x86regs_t regs;
  237 
  238         x86bios_init_regs(&regs);
  239         regs.R_AL = mode;
  240 
  241         x86bios_intr(&regs, 0x10);
  242 
  243         return (0);
  244 }
  245 
  246 static int
  247 vesa_bios_post(void)
  248 {
  249         x86regs_t regs;
  250         devclass_t dc;
  251         device_t *devs;
  252         device_t dev;
  253         int count, i, is_pci;
  254 
  255         if (x86bios_get_orm(vesa_bios_offs) == NULL)
  256                 return (1);
  257 
  258         dev = NULL;
  259         is_pci = 0;
  260 
  261         /* Find the matching PCI video controller. */
  262         dc = devclass_find("vgapci");
  263         if (dc != NULL && devclass_get_devices(dc, &devs, &count) == 0) {
  264                 for (i = 0; i < count; i++)
  265                         if (device_get_flags(devs[i]) != 0 &&
  266                             x86bios_match_device(vesa_bios_offs, devs[i])) {
  267                                 dev = devs[i];
  268                                 is_pci = 1;
  269                                 break;
  270                         }
  271                 free(devs, M_TEMP);
  272         }
  273 
  274         /* Try VGA if a PCI device is not found. */
  275         if (dev == NULL) {
  276                 dc = devclass_find(VGA_DRIVER_NAME);
  277                 if (dc != NULL)
  278                         dev = devclass_get_device(dc, 0);
  279         }
  280 
  281         if (bootverbose)
  282                 printf("%s: calling BIOS POST\n",
  283                     dev == NULL ? "VESA" : device_get_nameunit(dev));
  284 
  285         x86bios_init_regs(&regs);
  286         if (is_pci) {
  287                 regs.R_AH = pci_get_bus(dev);
  288                 regs.R_AL = (pci_get_slot(dev) << 3) |
  289                     (pci_get_function(dev) & 0x07);
  290         }
  291         regs.R_DL = 0x80;
  292         x86bios_call(&regs, X86BIOS_PHYSTOSEG(vesa_bios_offs + 3),
  293             X86BIOS_PHYSTOOFF(vesa_bios_offs + 3));
  294 
  295         if (x86bios_get_intr(0x10) == 0)
  296                 return (1);
  297 
  298         return (0);
  299 }
  300 
  301 /* VESA BIOS calls */
  302 static int
  303 vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags)
  304 {
  305         x86regs_t regs;
  306         uint32_t offs;
  307         void *buf;
  308 
  309         buf = x86bios_alloc(&offs, sizeof(*vmode), flags);
  310         if (buf == NULL)
  311                 return (1);
  312 
  313         x86bios_init_regs(&regs);
  314         regs.R_AX = 0x4f01;
  315         regs.R_CX = mode;
  316 
  317         regs.R_ES = X86BIOS_PHYSTOSEG(offs);
  318         regs.R_DI = X86BIOS_PHYSTOOFF(offs);
  319 
  320         x86bios_intr(&regs, 0x10);
  321 
  322         if (regs.R_AX != 0x004f) {
  323                 x86bios_free(buf, sizeof(*vmode));
  324                 return (1);
  325         }
  326 
  327         bcopy(buf, vmode, sizeof(*vmode));
  328         x86bios_free(buf, sizeof(*vmode));
  329 
  330         return (0);
  331 }
  332 
  333 static int
  334 vesa_bios_set_mode(int mode)
  335 {
  336         x86regs_t regs;
  337 
  338         x86bios_init_regs(&regs);
  339         regs.R_AX = 0x4f02;
  340         regs.R_BX = mode;
  341 
  342         x86bios_intr(&regs, 0x10);
  343 
  344         return (regs.R_AX != 0x004f);
  345 }
  346 
  347 #if 0
  348 static int
  349 vesa_bios_get_dac(void)
  350 {
  351         x86regs_t regs;
  352 
  353         x86bios_init_regs(&regs);
  354         regs.R_AX = 0x4f08;
  355         regs.R_BL = 1;
  356 
  357         x86bios_intr(&regs, 0x10);
  358 
  359         if (regs.R_AX != 0x004f)
  360                 return (6);
  361 
  362         return (regs.R_BH);
  363 }
  364 #endif
  365 
  366 static int
  367 vesa_bios_set_dac(int bits)
  368 {
  369         x86regs_t regs;
  370 
  371         x86bios_init_regs(&regs);
  372         regs.R_AX = 0x4f08;
  373         /* regs.R_BL = 0; */
  374         regs.R_BH = bits;
  375 
  376         x86bios_intr(&regs, 0x10);
  377 
  378         if (regs.R_AX != 0x004f)
  379                 return (6);
  380 
  381         return (regs.R_BH);
  382 }
  383 
  384 static int
  385 vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
  386 {
  387         x86regs_t regs;
  388         int i;
  389 
  390         x86bios_init_regs(&regs);
  391         regs.R_AX = 0x4f09;
  392         regs.R_BL = 1;
  393         regs.R_CX = colors;
  394         regs.R_DX = start;
  395 
  396         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  397         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  398 
  399         bits = 8 - bits;
  400         mtx_lock(&vesa_lock);
  401         x86bios_intr(&regs, 0x10);
  402         if (regs.R_AX != 0x004f) {
  403                 mtx_unlock(&vesa_lock);
  404                 return (1);
  405         }
  406         for (i = 0; i < colors; ++i) {
  407                 palette[i * 3] = vesa_palette[i * 4 + 2] << bits;
  408                 palette[i * 3 + 1] = vesa_palette[i * 4 + 1] << bits;
  409                 palette[i * 3 + 2] = vesa_palette[i * 4] << bits;
  410         }
  411         mtx_unlock(&vesa_lock);
  412 
  413         return (0);
  414 }
  415 
  416 static int
  417 vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  418                         int bits)
  419 {
  420         x86regs_t regs;
  421         int i;
  422 
  423         x86bios_init_regs(&regs);
  424         regs.R_AX = 0x4f09;
  425         regs.R_BL = 1;
  426         regs.R_CX = colors;
  427         regs.R_DX = start;
  428 
  429         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  430         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  431 
  432         bits = 8 - bits;
  433         mtx_lock(&vesa_lock);
  434         x86bios_intr(&regs, 0x10);
  435         if (regs.R_AX != 0x004f) {
  436                 mtx_unlock(&vesa_lock);
  437                 return (1);
  438         }
  439         for (i = 0; i < colors; ++i) {
  440                 r[i] = vesa_palette[i * 4 + 2] << bits;
  441                 g[i] = vesa_palette[i * 4 + 1] << bits;
  442                 b[i] = vesa_palette[i * 4] << bits;
  443         }
  444         mtx_unlock(&vesa_lock);
  445 
  446         return (0);
  447 }
  448 
  449 static int
  450 vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
  451 {
  452         x86regs_t regs;
  453         int i;
  454 
  455         x86bios_init_regs(&regs);
  456         regs.R_AX = 0x4f09;
  457         /* regs.R_BL = 0; */
  458         regs.R_CX = colors;
  459         regs.R_DX = start;
  460 
  461         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  462         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  463 
  464         bits = 8 - bits;
  465         mtx_lock(&vesa_lock);
  466         for (i = 0; i < colors; ++i) {
  467                 vesa_palette[i * 4] = palette[i * 3 + 2] >> bits;
  468                 vesa_palette[i * 4 + 1] = palette[i * 3 + 1] >> bits;
  469                 vesa_palette[i * 4 + 2] = palette[i * 3] >> bits;
  470                 vesa_palette[i * 4 + 3] = 0;
  471         }
  472         x86bios_intr(&regs, 0x10);
  473         mtx_unlock(&vesa_lock);
  474 
  475         return (regs.R_AX != 0x004f);
  476 }
  477 
  478 static int
  479 vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  480                         int bits)
  481 {
  482         x86regs_t regs;
  483         int i;
  484 
  485         x86bios_init_regs(&regs);
  486         regs.R_AX = 0x4f09;
  487         /* regs.R_BL = 0; */
  488         regs.R_CX = colors;
  489         regs.R_DX = start;
  490 
  491         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
  492         regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
  493 
  494         bits = 8 - bits;
  495         mtx_lock(&vesa_lock);
  496         for (i = 0; i < colors; ++i) {
  497                 vesa_palette[i * 4] = b[i] >> bits;
  498                 vesa_palette[i * 4 + 1] = g[i] >> bits;
  499                 vesa_palette[i * 4 + 2] = r[i] >> bits;
  500                 vesa_palette[i * 4 + 3] = 0;
  501         }
  502         x86bios_intr(&regs, 0x10);
  503         mtx_unlock(&vesa_lock);
  504 
  505         return (regs.R_AX != 0x004f);
  506 }
  507 
  508 static size_t
  509 vesa_bios_state_buf_size(int state)
  510 {
  511         x86regs_t regs;
  512 
  513         x86bios_init_regs(&regs);
  514         regs.R_AX = 0x4f04;
  515         /* regs.R_DL = STATE_SIZE; */
  516         regs.R_CX = state;
  517 
  518         x86bios_intr(&regs, 0x10);
  519 
  520         if (regs.R_AX != 0x004f)
  521                 return (0);
  522 
  523         return (regs.R_BX * 64);
  524 }
  525 
  526 static int
  527 vesa_bios_save_restore(int code, void *p)
  528 {
  529         x86regs_t regs;
  530 
  531         if (code != STATE_SAVE && code != STATE_LOAD)
  532                 return (1);
  533 
  534         x86bios_init_regs(&regs);
  535         regs.R_AX = 0x4f04;
  536         regs.R_DL = code;
  537         regs.R_CX = vesa_state;
  538 
  539         regs.R_ES = X86BIOS_PHYSTOSEG(vesa_state_buf_offs);
  540         regs.R_BX = X86BIOS_PHYSTOOFF(vesa_state_buf_offs);
  541 
  542         mtx_lock(&vesa_lock);
  543         switch (code) {
  544         case STATE_SAVE:
  545                 x86bios_intr(&regs, 0x10);
  546                 if (regs.R_AX == 0x004f)
  547                         bcopy(vesa_state_buf, p, vesa_state_buf_size);
  548                 break;
  549         case STATE_LOAD:
  550                 bcopy(p, vesa_state_buf, vesa_state_buf_size);
  551                 x86bios_intr(&regs, 0x10);
  552                 break;
  553         }
  554         mtx_unlock(&vesa_lock);
  555 
  556         return (regs.R_AX != 0x004f);
  557 }
  558 
  559 #ifdef MODE_TABLE_BROKEN
  560 static int
  561 vesa_bios_get_line_length(void)
  562 {
  563         x86regs_t regs;
  564 
  565         x86bios_init_regs(&regs);
  566         regs.R_AX = 0x4f06;
  567         regs.R_BL = 1;
  568 
  569         x86bios_intr(&regs, 0x10);
  570 
  571         if (regs.R_AX != 0x004f)
  572                 return (-1);
  573 
  574         return (regs.R_BX);
  575 }
  576 #endif
  577 
  578 static int
  579 vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
  580 {
  581         x86regs_t regs;
  582 
  583         x86bios_init_regs(&regs);
  584         regs.R_AX = 0x4f06;
  585         /* regs.R_BL = 0; */
  586         regs.R_CX = pixel;
  587 
  588         x86bios_intr(&regs, 0x10);
  589 
  590 #if VESA_DEBUG > 1
  591         printf("bx:%d, cx:%d, dx:%d\n", regs.R_BX, regs.R_CX, regs.R_DX);
  592 #endif
  593         if (regs.R_AX != 0x004f)
  594                 return (-1);
  595 
  596         if (bytes != NULL)
  597                 *bytes = regs.R_BX;
  598         if (lines != NULL)
  599                 *lines = regs.R_DX;
  600 
  601         return (0);
  602 }
  603 
  604 #if 0
  605 static int
  606 vesa_bios_get_start(int *x, int *y)
  607 {
  608         x86regs_t regs;
  609 
  610         x86bios_init_regs(&regs);
  611         regs.R_AX = 0x4f07;
  612         regs.R_BL = 1;
  613 
  614         x86bios_intr(&regs, 0x10);
  615 
  616         if (regs.R_AX != 0x004f)
  617                 return (-1);
  618 
  619         *x = regs.R_CX;
  620         *y = regs.R_DX;
  621 
  622         return (0);
  623 }
  624 #endif
  625 
  626 static int
  627 vesa_bios_set_start(int x, int y)
  628 {
  629         x86regs_t regs;
  630 
  631         x86bios_init_regs(&regs);
  632         regs.R_AX = 0x4f07;
  633         regs.R_BL = 0x80;
  634         regs.R_CX = x;
  635         regs.R_DX = y;
  636 
  637         x86bios_intr(&regs, 0x10);
  638 
  639         return (regs.R_AX != 0x004f);
  640 }
  641 
  642 /* map a generic video mode to a known mode */
  643 static int
  644 vesa_map_gen_mode_num(int type, int color, int mode)
  645 {
  646     static struct {
  647         int from;
  648         int to;
  649     } mode_map[] = {
  650         { M_TEXT_132x25, M_VESA_C132x25 },
  651         { M_TEXT_132x43, M_VESA_C132x43 },
  652         { M_TEXT_132x50, M_VESA_C132x50 },
  653         { M_TEXT_132x60, M_VESA_C132x60 },
  654     };
  655     int i;
  656 
  657     for (i = 0; i < nitems(mode_map); ++i) {
  658         if (mode_map[i].from == mode)
  659             return (mode_map[i].to);
  660     }
  661     return (mode);
  662 }
  663 
  664 static int
  665 vesa_translate_flags(u_int16_t vflags)
  666 {
  667         static struct {
  668                 u_int16_t mask;
  669                 int set;
  670                 int reset;
  671         } ftable[] = {
  672                 { V_MODECOLOR, V_INFO_COLOR, 0 },
  673                 { V_MODEGRAPHICS, V_INFO_GRAPHICS, 0 },
  674                 { V_MODELFB, V_INFO_LINEAR, 0 },
  675                 { V_MODENONVGA, V_INFO_NONVGA, 0 },
  676         };
  677         int flags;
  678         int i;
  679 
  680         for (flags = 0, i = 0; i < nitems(ftable); ++i) {
  681                 flags |= (vflags & ftable[i].mask) ? 
  682                          ftable[i].set : ftable[i].reset;
  683         }
  684         return (flags);
  685 }
  686 
  687 static int
  688 vesa_translate_mmodel(u_int8_t vmodel)
  689 {
  690         static struct {
  691                 u_int8_t vmodel;
  692                 int mmodel;
  693         } mtable[] = {
  694                 { V_MMTEXT,     V_INFO_MM_TEXT },
  695                 { V_MMCGA,      V_INFO_MM_CGA },
  696                 { V_MMHGC,      V_INFO_MM_HGC },
  697                 { V_MMEGA,      V_INFO_MM_PLANAR },
  698                 { V_MMPACKED,   V_INFO_MM_PACKED },
  699                 { V_MMDIRCOLOR, V_INFO_MM_DIRECT },
  700         };
  701         int i;
  702 
  703         for (i = 0; mtable[i].mmodel >= 0; ++i) {
  704                 if (mtable[i].vmodel == vmodel)
  705                         return (mtable[i].mmodel);
  706         }
  707         return (V_INFO_MM_OTHER);
  708 }
  709 
  710 static int
  711 vesa_get_bpscanline(struct vesa_mode *vmode)
  712 {
  713         int bpsl;
  714 
  715         if ((vmode->v_modeattr & V_MODEGRAPHICS) != 0) {
  716                 /* Find the minimum length. */
  717                 switch (vmode->v_bpp / vmode->v_planes) {
  718                 case 1:
  719                         bpsl = vmode->v_width / 8;
  720                         break;
  721                 case 2:
  722                         bpsl = vmode->v_width / 4;
  723                         break;
  724                 case 4:
  725                         bpsl = vmode->v_width / 2;
  726                         break;
  727                 default:
  728                         bpsl = vmode->v_width * ((vmode->v_bpp + 7) / 8);
  729                         bpsl /= vmode->v_planes;
  730                         break;
  731                 }
  732 
  733                 /* Use VBE 3.0 information if it looks sane. */
  734                 if ((vmode->v_modeattr & V_MODELFB) != 0 &&
  735                     vesa_adp_info->v_version >= 0x0300 &&
  736                     vmode->v_linbpscanline > bpsl)
  737                         return (vmode->v_linbpscanline);
  738 
  739                 /* Return the minimum if the mode table looks absurd. */
  740                 if (vmode->v_bpscanline < bpsl)
  741                         return (bpsl);
  742         }
  743 
  744         return (vmode->v_bpscanline);
  745 }
  746 
  747 #define VESA_MAXSTR             256
  748 
  749 #define VESA_STRCPY(dst, src)   do {                            \
  750         char *str;                                              \
  751         int i;                                                  \
  752         dst = malloc(VESA_MAXSTR, M_DEVBUF, M_WAITOK);          \
  753         str = x86bios_offset(BIOS_SADDRTOLADDR(src));           \
  754         for (i = 0; i < VESA_MAXSTR - 1 && str[i] != '\0'; i++) \
  755                 dst[i] = str[i];                                \
  756         dst[i] = '\0';                                          \
  757 } while (0)
  758 
  759 static int
  760 vesa_bios_init(void)
  761 {
  762         struct vesa_mode vmode;
  763         struct vesa_info *buf;
  764         video_info_t *p;
  765         x86regs_t regs;
  766         size_t bsize;
  767         size_t msize;
  768         void *vmbuf;
  769         uint8_t *vbios;
  770         uint32_t offs;
  771         uint16_t vers;
  772         int is_via_cle266;
  773         int modes;
  774         int i;
  775 
  776         if (vesa_init_done)
  777                 return (0);
  778 
  779         vesa_bios_offs = VESA_BIOS_OFFSET;
  780 
  781         /*
  782          * If the VBE real mode interrupt vector is not found, try BIOS POST.
  783          */
  784         vesa_bios_int10 = x86bios_get_intr(0x10);
  785         if (vesa_bios_int10 == 0) {
  786                 if (vesa_bios_post() != 0)
  787                         return (1);
  788                 vesa_bios_int10 = x86bios_get_intr(0x10);
  789                 if (vesa_bios_int10 == 0)
  790                         return (1);
  791         }
  792 
  793         /*
  794          * Shadow video ROM.
  795          */
  796         offs = vesa_bios_int10;
  797         if (vesa_shadow_rom) {
  798                 vbios = x86bios_get_orm(vesa_bios_offs);
  799                 if (vbios != NULL) {
  800                         vesa_bios_size = vbios[2] * 512;
  801                         if (((VESA_BIOS_OFFSET << 12) & 0xffff0000) ==
  802                             (vesa_bios_int10 & 0xffff0000) &&
  803                             vesa_bios_size > (vesa_bios_int10 & 0xffff)) {
  804                                 vesa_bios = x86bios_alloc(&vesa_bios_offs,
  805                                     vesa_bios_size, M_WAITOK);
  806                                 bcopy(vbios, vesa_bios, vesa_bios_size);
  807                                 offs = ((vesa_bios_offs << 12) & 0xffff0000) +
  808                                     (vesa_bios_int10 & 0xffff);
  809                                 x86bios_set_intr(0x10, offs);
  810                         }
  811                 }
  812                 if (vesa_bios == NULL)
  813                         printf("VESA: failed to shadow video ROM\n");
  814         }
  815         if (bootverbose)
  816                 printf("VESA: INT 0x10 vector 0x%04x:0x%04x\n",
  817                     (offs >> 16) & 0xffff, offs & 0xffff);
  818 
  819         x86bios_init_regs(&regs);
  820         regs.R_AX = 0x4f00;
  821 
  822         vmbuf = x86bios_alloc(&offs, sizeof(*buf), M_WAITOK);
  823 
  824         regs.R_ES = X86BIOS_PHYSTOSEG(offs);
  825         regs.R_DI = X86BIOS_PHYSTOOFF(offs);
  826 
  827         bcopy("VBE2", vmbuf, 4);        /* try for VBE2 data */
  828         x86bios_intr(&regs, 0x10);
  829 
  830         if (regs.R_AX != 0x004f || bcmp("VESA", vmbuf, 4) != 0)
  831                 goto fail;
  832 
  833         vesa_adp_info = buf = malloc(sizeof(*buf), M_DEVBUF, M_WAITOK);
  834         bcopy(vmbuf, buf, sizeof(*buf));
  835 
  836         if (bootverbose) {
  837                 printf("VESA: information block\n");
  838                 hexdump(buf, sizeof(*buf), NULL, HD_OMIT_CHARS);
  839         }
  840 
  841         vers = buf->v_version = le16toh(buf->v_version);
  842         buf->v_oemstr = le32toh(buf->v_oemstr);
  843         buf->v_flags = le32toh(buf->v_flags);
  844         buf->v_modetable = le32toh(buf->v_modetable);
  845         buf->v_memsize = le16toh(buf->v_memsize);
  846         buf->v_revision = le16toh(buf->v_revision);
  847         buf->v_venderstr = le32toh(buf->v_venderstr);
  848         buf->v_prodstr = le32toh(buf->v_prodstr);
  849         buf->v_revstr = le32toh(buf->v_revstr);
  850 
  851         if (vers < 0x0102) {
  852                 printf("VESA: VBE version %d.%d is not supported; "
  853                     "version 1.2 or later is required.\n",
  854                     ((vers & 0xf000) >> 12) * 10 + ((vers & 0x0f00) >> 8),
  855                     ((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f));
  856                 goto fail;
  857         }
  858 
  859         VESA_STRCPY(vesa_oemstr, buf->v_oemstr);
  860         if (vers >= 0x0200) {
  861                 VESA_STRCPY(vesa_venderstr, buf->v_venderstr);
  862                 VESA_STRCPY(vesa_prodstr, buf->v_prodstr);
  863                 VESA_STRCPY(vesa_revstr, buf->v_revstr);
  864         }
  865         is_via_cle266 = strncmp(vesa_oemstr, VESA_VIA_CLE266,
  866             sizeof(VESA_VIA_CLE266)) == 0;
  867 
  868         if (buf->v_modetable == 0)
  869                 goto fail;
  870 
  871         msize = (size_t)buf->v_memsize * 64 * 1024;
  872 
  873         vesa_vmodetab = x86bios_offset(BIOS_SADDRTOLADDR(buf->v_modetable));
  874 
  875         for (i = 0, modes = 0; (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1)) &&
  876             (vesa_vmodetab[i] != 0xffff); ++i) {
  877                 vesa_vmodetab[i] = le16toh(vesa_vmodetab[i]);
  878                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_WAITOK))
  879                         continue;
  880 
  881                 vmode.v_modeattr = le16toh(vmode.v_modeattr);
  882                 vmode.v_wgran = le16toh(vmode.v_wgran);
  883                 vmode.v_wsize = le16toh(vmode.v_wsize);
  884                 vmode.v_waseg = le16toh(vmode.v_waseg);
  885                 vmode.v_wbseg = le16toh(vmode.v_wbseg);
  886                 vmode.v_posfunc = le32toh(vmode.v_posfunc);
  887                 vmode.v_bpscanline = le16toh(vmode.v_bpscanline);
  888                 vmode.v_width = le16toh(vmode.v_width);
  889                 vmode.v_height = le16toh(vmode.v_height);
  890                 vmode.v_lfb = le32toh(vmode.v_lfb);
  891                 vmode.v_offscreen = le32toh(vmode.v_offscreen);
  892                 vmode.v_offscreensize = le16toh(vmode.v_offscreensize);
  893                 vmode.v_linbpscanline = le16toh(vmode.v_linbpscanline);
  894                 vmode.v_maxpixelclock = le32toh(vmode.v_maxpixelclock);
  895 
  896                 /* reject unsupported modes */
  897 #if 0
  898                 if ((vmode.v_modeattr &
  899                     (V_MODESUPP | V_MODEOPTINFO | V_MODENONVGA)) !=
  900                     (V_MODESUPP | V_MODEOPTINFO))
  901                         continue;
  902 #else
  903                 if ((vmode.v_modeattr & V_MODEOPTINFO) == 0) {
  904 #if VESA_DEBUG > 1
  905                         printf("Rejecting VESA %s mode: %d x %d x %d bpp "
  906                             " attr = %x\n",
  907                             vmode.v_modeattr & V_MODEGRAPHICS ?
  908                             "graphics" : "text",
  909                             vmode.v_width, vmode.v_height, vmode.v_bpp,
  910                             vmode.v_modeattr);
  911 #endif
  912                         continue;
  913                 }
  914 #endif
  915 
  916                 bsize = vesa_get_bpscanline(&vmode) * vmode.v_height;
  917                 if ((vmode.v_modeattr & V_MODEGRAPHICS) != 0)
  918                         bsize *= vmode.v_planes;
  919 
  920                 /* Does it have enough memory to support this mode? */
  921                 if (msize < bsize) {
  922 #if VESA_DEBUG > 1
  923                         printf("Rejecting VESA %s mode: %d x %d x %d bpp "
  924                             " attr = %x, not enough memory\n",
  925                             vmode.v_modeattr & V_MODEGRAPHICS ?
  926                             "graphics" : "text",
  927                             vmode.v_width, vmode.v_height, vmode.v_bpp,
  928                             vmode.v_modeattr);
  929 #endif
  930                         continue;
  931                 }
  932                 if (bsize > vesa_vmem_max)
  933                         vesa_vmem_max = bsize;
  934 
  935                 /* expand the array if necessary */
  936                 if (modes >= vesa_vmode_max) {
  937                         vesa_vmode_max += MODE_TABLE_DELTA;
  938                         p = malloc(sizeof(*vesa_vmode) * (vesa_vmode_max + 1),
  939                             M_DEVBUF, M_WAITOK);
  940 #if VESA_DEBUG > 1
  941                         printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
  942                             modes, vesa_vmode_max);
  943 #endif
  944                         if (modes > 0) {
  945                                 bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
  946                                 free(vesa_vmode, M_DEVBUF);
  947                         }
  948                         vesa_vmode = p;
  949                 }
  950 
  951 #if VESA_DEBUG > 1
  952                 printf("Found VESA %s mode: %d x %d x %d bpp\n",
  953                     vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
  954                     vmode.v_width, vmode.v_height, vmode.v_bpp);
  955 #endif
  956                 if (is_via_cle266) {
  957                     if ((vmode.v_width & 0xff00) >> 8 == vmode.v_height - 1) {
  958                         vmode.v_width &= 0xff;
  959                         vmode.v_waseg = 0xb8000 >> 4;
  960                     }
  961                 }
  962 
  963                 /* copy some fields */
  964                 bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
  965                 vesa_vmode[modes].vi_mode = vesa_vmodetab[i];
  966                 vesa_vmode[modes].vi_width = vmode.v_width;
  967                 vesa_vmode[modes].vi_height = vmode.v_height;
  968                 vesa_vmode[modes].vi_depth = vmode.v_bpp;
  969                 vesa_vmode[modes].vi_planes = vmode.v_planes;
  970                 vesa_vmode[modes].vi_cwidth = vmode.v_cwidth;
  971                 vesa_vmode[modes].vi_cheight = vmode.v_cheight;
  972                 vesa_vmode[modes].vi_window = (vm_offset_t)vmode.v_waseg << 4;
  973                 /* XXX window B */
  974                 vesa_vmode[modes].vi_window_size = vmode.v_wsize * 1024;
  975                 vesa_vmode[modes].vi_window_gran = vmode.v_wgran * 1024;
  976                 if (vmode.v_modeattr & V_MODELFB)
  977                         vesa_vmode[modes].vi_buffer = vmode.v_lfb;
  978                 vesa_vmode[modes].vi_buffer_size = bsize;
  979                 vesa_vmode[modes].vi_mem_model =
  980                     vesa_translate_mmodel(vmode.v_memmodel);
  981                 switch (vesa_vmode[modes].vi_mem_model) {
  982                 case V_INFO_MM_DIRECT:
  983                         if ((vmode.v_modeattr & V_MODELFB) != 0 &&
  984                             vers >= 0x0300) {
  985                                 vesa_vmode[modes].vi_pixel_fields[0] =
  986                                     vmode.v_linredfieldpos;
  987                                 vesa_vmode[modes].vi_pixel_fields[1] =
  988                                     vmode.v_lingreenfieldpos;
  989                                 vesa_vmode[modes].vi_pixel_fields[2] =
  990                                     vmode.v_linbluefieldpos;
  991                                 vesa_vmode[modes].vi_pixel_fields[3] =
  992                                     vmode.v_linresfieldpos;
  993                                 vesa_vmode[modes].vi_pixel_fsizes[0] =
  994                                     vmode.v_linredmasksize;
  995                                 vesa_vmode[modes].vi_pixel_fsizes[1] =
  996                                     vmode.v_lingreenmasksize;
  997                                 vesa_vmode[modes].vi_pixel_fsizes[2] =
  998                                     vmode.v_linbluemasksize;
  999                                 vesa_vmode[modes].vi_pixel_fsizes[3] =
 1000                                     vmode.v_linresmasksize;
 1001                         } else {
 1002                                 vesa_vmode[modes].vi_pixel_fields[0] =
 1003                                     vmode.v_redfieldpos;
 1004                                 vesa_vmode[modes].vi_pixel_fields[1] =
 1005                                     vmode.v_greenfieldpos;
 1006                                 vesa_vmode[modes].vi_pixel_fields[2] =
 1007                                     vmode.v_bluefieldpos;
 1008                                 vesa_vmode[modes].vi_pixel_fields[3] =
 1009                                     vmode.v_resfieldpos;
 1010                                 vesa_vmode[modes].vi_pixel_fsizes[0] =
 1011                                     vmode.v_redmasksize;
 1012                                 vesa_vmode[modes].vi_pixel_fsizes[1] =
 1013                                     vmode.v_greenmasksize;
 1014                                 vesa_vmode[modes].vi_pixel_fsizes[2] =
 1015                                     vmode.v_bluemasksize;
 1016                                 vesa_vmode[modes].vi_pixel_fsizes[3] =
 1017                                     vmode.v_resmasksize;
 1018                         }
 1019                         /* FALLTHROUGH */
 1020                 case V_INFO_MM_PACKED:
 1021                         vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7) / 8;
 1022                         break;
 1023                 }
 1024                 vesa_vmode[modes].vi_flags =
 1025                     vesa_translate_flags(vmode.v_modeattr) | V_INFO_VESA;
 1026 
 1027                 ++modes;
 1028         }
 1029         if (vesa_vmode != NULL)
 1030                 vesa_vmode[modes].vi_mode = EOT;
 1031 
 1032         if (bootverbose)
 1033                 printf("VESA: %d mode(s) found\n", modes);
 1034 
 1035         if (modes == 0)
 1036                 goto fail;
 1037 
 1038         x86bios_free(vmbuf, sizeof(*buf));
 1039 
 1040         /* Probe supported save/restore states. */
 1041         for (i = 0; i < 4; i++)
 1042                 if (vesa_bios_state_buf_size(1 << i) > 0)
 1043                         vesa_state |= 1 << i;
 1044         if (vesa_state != 0)
 1045                 vesa_state_buf_size = vesa_bios_state_buf_size(vesa_state);
 1046         vesa_palette = x86bios_alloc(&vesa_palette_offs,
 1047             VESA_PALETTE_SIZE + vesa_state_buf_size, M_WAITOK);
 1048         if (vesa_state_buf_size > 0) {
 1049                 vesa_state_buf = vesa_palette + VESA_PALETTE_SIZE;
 1050                 vesa_state_buf_offs = vesa_palette_offs + VESA_PALETTE_SIZE;
 1051         }
 1052 
 1053         return (0);
 1054 
 1055 fail:
 1056         x86bios_free(vmbuf, sizeof(buf));
 1057         vesa_bios_uninit();
 1058         return (1);
 1059 }
 1060 
 1061 static void
 1062 vesa_bios_uninit(void)
 1063 {
 1064 
 1065         if (vesa_bios != NULL) {
 1066                 x86bios_set_intr(0x10, vesa_bios_int10);
 1067                 vesa_bios_offs = VESA_BIOS_OFFSET;
 1068                 x86bios_free(vesa_bios, vesa_bios_size);
 1069                 vesa_bios = NULL;
 1070         }
 1071         if (vesa_adp_info != NULL) {
 1072                 free(vesa_adp_info, M_DEVBUF);
 1073                 vesa_adp_info = NULL;
 1074         }
 1075         if (vesa_oemstr != NULL) {
 1076                 free(vesa_oemstr, M_DEVBUF);
 1077                 vesa_oemstr = NULL;
 1078         }
 1079         if (vesa_venderstr != NULL) {
 1080                 free(vesa_venderstr, M_DEVBUF);
 1081                 vesa_venderstr = NULL;
 1082         }
 1083         if (vesa_prodstr != NULL) {
 1084                 free(vesa_prodstr, M_DEVBUF);
 1085                 vesa_prodstr = NULL;
 1086         }
 1087         if (vesa_revstr != NULL) {
 1088                 free(vesa_revstr, M_DEVBUF);
 1089                 vesa_revstr = NULL;
 1090         }
 1091         if (vesa_vmode != NULL) {
 1092                 free(vesa_vmode, M_DEVBUF);
 1093                 vesa_vmode = NULL;
 1094         }
 1095         if (vesa_palette != NULL) {
 1096                 x86bios_free(vesa_palette,
 1097                     VESA_PALETTE_SIZE + vesa_state_buf_size);
 1098                 vesa_palette = NULL;
 1099         }
 1100 }
 1101 
 1102 static void
 1103 vesa_clear_modes(video_info_t *info, int color)
 1104 {
 1105         while (info->vi_mode != EOT) {
 1106                 if ((info->vi_flags & V_INFO_COLOR) != color)
 1107                         info->vi_mode = NA;
 1108                 ++info;
 1109         }
 1110 }
 1111 
 1112 /* entry points */
 1113 
 1114 static int
 1115 vesa_configure(int flags)
 1116 {
 1117         video_adapter_t *adp;
 1118         int adapters;
 1119         int error;
 1120         int i;
 1121 
 1122         if (vesa_init_done)
 1123                 return (0);
 1124         if (flags & VIO_PROBE_ONLY)
 1125                 return (0);
 1126 
 1127         /*
 1128          * If the VESA module has already been loaded, abort loading 
 1129          * the module this time.
 1130          */
 1131         for (i = 0; (adp = vid_get_adapter(i)) != NULL; ++i) {
 1132                 if (adp->va_flags & V_ADP_VESA)
 1133                         return (ENXIO);
 1134                 if (adp->va_type == KD_VGA)
 1135                         break;
 1136         }
 1137 
 1138         /*
 1139          * The VGA adapter is not found.  This is because either 
 1140          * 1) the VGA driver has not been initialized, or 2) the VGA card
 1141          * is not present.  If 1) is the case, we shall defer
 1142          * initialization for now and try again later.
 1143          */
 1144         if (adp == NULL) {
 1145                 vga_sub_configure = vesa_configure;
 1146                 return (ENODEV);
 1147         }
 1148 
 1149         /* count number of registered adapters */
 1150         for (++i; vid_get_adapter(i) != NULL; ++i)
 1151                 ;
 1152         adapters = i;
 1153 
 1154         /* call VESA BIOS */
 1155         vesa_adp = adp;
 1156         if (vesa_bios_init()) {
 1157                 vesa_adp = NULL;
 1158                 return (ENXIO);
 1159         }
 1160         vesa_adp->va_flags |= V_ADP_VESA;
 1161 
 1162         /* remove conflicting modes if we have more than one adapter */
 1163         if (adapters > 1) {
 1164                 vesa_clear_modes(vesa_vmode,
 1165                                  (vesa_adp->va_flags & V_ADP_COLOR) ? 
 1166                                      V_INFO_COLOR : 0);
 1167         }
 1168 
 1169         if ((error = vesa_load_ioctl()) == 0) {
 1170                 prevvidsw = vidsw[vesa_adp->va_index];
 1171                 vidsw[vesa_adp->va_index] = &vesavidsw;
 1172                 vesa_init_done = TRUE;
 1173         } else {
 1174                 vesa_adp = NULL;
 1175                 return (error);
 1176         }
 1177 
 1178         return (0);
 1179 }
 1180 
 1181 #if 0
 1182 static int
 1183 vesa_nop(void)
 1184 {
 1185 
 1186         return (0);
 1187 }
 1188 #endif
 1189 
 1190 static int
 1191 vesa_error(void)
 1192 {
 1193 
 1194         return (1);
 1195 }
 1196 
 1197 static int
 1198 vesa_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
 1199 {
 1200 
 1201         return ((*prevvidsw->probe)(unit, adpp, arg, flags));
 1202 }
 1203 
 1204 static int
 1205 vesa_init(int unit, video_adapter_t *adp, int flags)
 1206 {
 1207 
 1208         return ((*prevvidsw->init)(unit, adp, flags));
 1209 }
 1210 
 1211 static int
 1212 vesa_get_info(video_adapter_t *adp, int mode, video_info_t *info)
 1213 {
 1214         int i;
 1215 
 1216         if ((*prevvidsw->get_info)(adp, mode, info) == 0)
 1217                 return (0);
 1218 
 1219         if (adp != vesa_adp)
 1220                 return (1);
 1221 
 1222         mode = vesa_map_gen_mode_num(vesa_adp->va_type, 
 1223                                      vesa_adp->va_flags & V_ADP_COLOR, mode);
 1224         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
 1225                 if (vesa_vmode[i].vi_mode == NA)
 1226                         continue;
 1227                 if (vesa_vmode[i].vi_mode == mode) {
 1228                         *info = vesa_vmode[i];
 1229                         return (0);
 1230                 }
 1231         }
 1232         return (1);
 1233 }
 1234 
 1235 static int
 1236 vesa_query_mode(video_adapter_t *adp, video_info_t *info)
 1237 {
 1238         int i;
 1239 
 1240         if ((*prevvidsw->query_mode)(adp, info) == 0)
 1241                 return (0);
 1242         if (adp != vesa_adp)
 1243                 return (ENODEV);
 1244 
 1245         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
 1246                 if ((info->vi_width != 0)
 1247                     && (info->vi_width != vesa_vmode[i].vi_width))
 1248                         continue;
 1249                 if ((info->vi_height != 0)
 1250                     && (info->vi_height != vesa_vmode[i].vi_height))
 1251                         continue;
 1252                 if ((info->vi_cwidth != 0)
 1253                     && (info->vi_cwidth != vesa_vmode[i].vi_cwidth))
 1254                         continue;
 1255                 if ((info->vi_cheight != 0)
 1256                     && (info->vi_cheight != vesa_vmode[i].vi_cheight))
 1257                         continue;
 1258                 if ((info->vi_depth != 0)
 1259                     && (info->vi_depth != vesa_vmode[i].vi_depth))
 1260                         continue;
 1261                 if ((info->vi_planes != 0)
 1262                     && (info->vi_planes != vesa_vmode[i].vi_planes))
 1263                         continue;
 1264                 /* pixel format, memory model */
 1265                 if ((info->vi_flags != 0)
 1266                     && (info->vi_flags != vesa_vmode[i].vi_flags))
 1267                         continue;
 1268                 *info = vesa_vmode[i];
 1269                 return (0);
 1270         }
 1271         return (ENODEV);
 1272 }
 1273 
 1274 static int
 1275 vesa_set_mode(video_adapter_t *adp, int mode)
 1276 {
 1277         video_info_t info;
 1278 
 1279         if (adp != vesa_adp)
 1280                 return ((*prevvidsw->set_mode)(adp, mode));
 1281 
 1282         mode = vesa_map_gen_mode_num(adp->va_type, 
 1283                                      adp->va_flags & V_ADP_COLOR, mode);
 1284 #if VESA_DEBUG > 0
 1285         printf("VESA: set_mode(): %d(%x) -> %d(%x)\n",
 1286                 adp->va_mode, adp->va_mode, mode, mode);
 1287 #endif
 1288         /* 
 1289          * If the current mode is a VESA mode and the new mode is not,
 1290          * restore the state of the adapter first by setting one of the
 1291          * standard VGA mode, so that non-standard, extended SVGA registers 
 1292          * are set to the state compatible with the standard VGA modes. 
 1293          * Otherwise (*prevvidsw->set_mode)() may not be able to set up 
 1294          * the new mode correctly.
 1295          */
 1296         if (VESA_MODE(adp->va_mode)) {
 1297                 if (!VESA_MODE(mode) &&
 1298                     (*prevvidsw->get_info)(adp, mode, &info) == 0) {
 1299                         if ((adp->va_flags & V_ADP_DAC8) != 0) {
 1300                                 vesa_bios_set_dac(6);
 1301                                 adp->va_flags &= ~V_ADP_DAC8;
 1302                         }
 1303                         int10_set_mode(adp->va_initial_bios_mode);
 1304                         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1305                                 pmap_unmapdev(adp->va_buffer, vesa_vmem_max);
 1306                         /* 
 1307                          * Once (*prevvidsw->get_info)() succeeded, 
 1308                          * (*prevvidsw->set_mode)() below won't fail...
 1309                          */
 1310                 }
 1311         }
 1312 
 1313         /* we may not need to handle this mode after all... */
 1314         if (!VESA_MODE(mode) && (*prevvidsw->set_mode)(adp, mode) == 0)
 1315                 return (0);
 1316 
 1317         /* is the new mode supported? */
 1318         if (vesa_get_info(adp, mode, &info))
 1319                 return (1);
 1320         /* assert(VESA_MODE(mode)); */
 1321 
 1322 #if VESA_DEBUG > 0
 1323         printf("VESA: about to set a VESA mode...\n");
 1324 #endif
 1325         /* don't use the linear frame buffer for text modes. XXX */
 1326         if (!(info.vi_flags & V_INFO_GRAPHICS))
 1327                 info.vi_flags &= ~V_INFO_LINEAR;
 1328 
 1329         if ((info.vi_flags & V_INFO_LINEAR) != 0)
 1330                 mode |= 0x4000;
 1331         if (vesa_bios_set_mode(mode | 0x8000))
 1332                 return (1);
 1333 
 1334         /* Palette format is reset by the above VBE function call. */
 1335         adp->va_flags &= ~V_ADP_DAC8;
 1336 
 1337         if ((vesa_adp_info->v_flags & V_DAC8) != 0 &&
 1338             (info.vi_flags & V_INFO_GRAPHICS) != 0 &&
 1339             vesa_bios_set_dac(8) > 6)
 1340                 adp->va_flags |= V_ADP_DAC8;
 1341 
 1342         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1343                 pmap_unmapdev(adp->va_buffer, vesa_vmem_max);
 1344 
 1345 #if VESA_DEBUG > 0
 1346         printf("VESA: mode set!\n");
 1347 #endif
 1348         vesa_adp->va_mode = mode & 0x1ff;       /* Mode number is 9-bit. */
 1349         vesa_adp->va_flags &= ~V_ADP_COLOR;
 1350         vesa_adp->va_flags |= 
 1351                 (info.vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
 1352         vesa_adp->va_crtc_addr =
 1353                 (vesa_adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
 1354 
 1355         vesa_adp->va_line_width = info.vi_buffer_size / info.vi_height;
 1356         if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
 1357                 vesa_adp->va_line_width /= info.vi_planes;
 1358 
 1359 #ifdef MODE_TABLE_BROKEN
 1360         /* If VBE function returns bigger bytes per scan line, use it. */
 1361         {
 1362                 int bpsl = vesa_bios_get_line_length();
 1363                 if (bpsl > vesa_adp->va_line_width) {
 1364                         vesa_adp->va_line_width = bpsl;
 1365                         info.vi_buffer_size = bpsl * info.vi_height;
 1366                         if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
 1367                                 info.vi_buffer_size *= info.vi_planes;
 1368                 }
 1369         }
 1370 #endif
 1371 
 1372         if (info.vi_flags & V_INFO_LINEAR) {
 1373 #if VESA_DEBUG > 1
 1374                 printf("VESA: setting up LFB\n");
 1375 #endif
 1376                 vesa_adp->va_buffer =
 1377                     (vm_offset_t)pmap_mapdev_attr(info.vi_buffer,
 1378                     vesa_vmem_max, PAT_WRITE_COMBINING);
 1379                 vesa_adp->va_window = vesa_adp->va_buffer;
 1380                 vesa_adp->va_window_size = info.vi_buffer_size / info.vi_planes;
 1381                 vesa_adp->va_window_gran = info.vi_buffer_size / info.vi_planes;
 1382         } else {
 1383                 vesa_adp->va_buffer = 0;
 1384                 vesa_adp->va_window = (vm_offset_t)x86bios_offset(info.vi_window);
 1385                 vesa_adp->va_window_size = info.vi_window_size;
 1386                 vesa_adp->va_window_gran = info.vi_window_gran;
 1387         }
 1388         vesa_adp->va_buffer_size = info.vi_buffer_size;
 1389         vesa_adp->va_window_orig = 0;
 1390         vesa_adp->va_disp_start.x = 0;
 1391         vesa_adp->va_disp_start.y = 0;
 1392 #if VESA_DEBUG > 0
 1393         printf("vesa_set_mode(): vi_width:%d, line_width:%d\n",
 1394                info.vi_width, vesa_adp->va_line_width);
 1395 #endif
 1396         bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
 1397 
 1398         /* move hardware cursor out of the way */
 1399         (*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
 1400 
 1401         return (0);
 1402 }
 1403 
 1404 static int
 1405 vesa_save_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
 1406                u_char *data, int ch, int count)
 1407 {
 1408 
 1409         return ((*prevvidsw->save_font)(adp, page, fontsize, fontwidth, data,
 1410             ch, count));
 1411 }
 1412 
 1413 static int
 1414 vesa_load_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
 1415                u_char *data, int ch, int count)
 1416 {
 1417 
 1418         return ((*prevvidsw->load_font)(adp, page, fontsize, fontwidth, data,
 1419                 ch, count));
 1420 }
 1421 
 1422 static int
 1423 vesa_show_font(video_adapter_t *adp, int page)
 1424 {
 1425 
 1426         return ((*prevvidsw->show_font)(adp, page));
 1427 }
 1428 
 1429 static int
 1430 vesa_save_palette(video_adapter_t *adp, u_char *palette)
 1431 {
 1432         int bits;
 1433 
 1434         if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
 1435                 bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1436                 if (vesa_bios_save_palette(0, 256, palette, bits) == 0)
 1437                         return (0);
 1438         }
 1439 
 1440         return ((*prevvidsw->save_palette)(adp, palette));
 1441 }
 1442 
 1443 static int
 1444 vesa_load_palette(video_adapter_t *adp, u_char *palette)
 1445 {
 1446         int bits;
 1447 
 1448         if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
 1449                 bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1450                 if (vesa_bios_load_palette(0, 256, palette, bits) == 0)
 1451                         return (0);
 1452         }
 1453 
 1454         return ((*prevvidsw->load_palette)(adp, palette));
 1455 }
 1456 
 1457 static int
 1458 vesa_set_border(video_adapter_t *adp, int color)
 1459 {
 1460 
 1461         return ((*prevvidsw->set_border)(adp, color));
 1462 }
 1463 
 1464 static int
 1465 vesa_save_state(video_adapter_t *adp, void *p, size_t size)
 1466 {
 1467         void *buf;
 1468         size_t bsize;
 1469 
 1470         if (adp != vesa_adp || (size == 0 && vesa_state_buf_size == 0))
 1471                 return ((*prevvidsw->save_state)(adp, p, size));
 1472 
 1473         bsize = offsetof(adp_state_t, regs) + vesa_state_buf_size;
 1474         if (size == 0)
 1475                 return (bsize);
 1476         if (vesa_state_buf_size > 0 && size < bsize)
 1477                 return (EINVAL);
 1478 
 1479         if (vesa_vmem_buf != NULL) {
 1480                 free(vesa_vmem_buf, M_DEVBUF);
 1481                 vesa_vmem_buf = NULL;
 1482         }
 1483         if (VESA_MODE(adp->va_mode)) {
 1484                 buf = (void *)adp->va_buffer;
 1485                 if (buf != NULL) {
 1486                         bsize = adp->va_buffer_size;
 1487                         vesa_vmem_buf = malloc(bsize, M_DEVBUF, M_NOWAIT);
 1488                         if (vesa_vmem_buf != NULL)
 1489                                 bcopy(buf, vesa_vmem_buf, bsize);
 1490                 }
 1491         }
 1492         if (vesa_state_buf_size == 0)
 1493                 return ((*prevvidsw->save_state)(adp, p, size));
 1494         ((adp_state_t *)p)->sig = V_STATE_SIG;
 1495         return (vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs));
 1496 }
 1497 
 1498 static int
 1499 vesa_load_state(video_adapter_t *adp, void *p)
 1500 {
 1501         void *buf;
 1502         size_t bsize;
 1503         int error, mode;
 1504 
 1505         if (adp != vesa_adp)
 1506                 return ((*prevvidsw->load_state)(adp, p));
 1507 
 1508         /* Try BIOS POST to restore a sane state. */
 1509         (void)vesa_bios_post();
 1510         bsize = adp->va_buffer_size;
 1511         mode = adp->va_mode;
 1512         error = vesa_set_mode(adp, adp->va_initial_mode);
 1513         if (mode != adp->va_initial_mode)
 1514                 error = vesa_set_mode(adp, mode);
 1515 
 1516         if (vesa_vmem_buf != NULL) {
 1517                 if (error == 0 && VESA_MODE(mode)) {
 1518                         buf = (void *)adp->va_buffer;
 1519                         if (buf != NULL)
 1520                                 bcopy(vesa_vmem_buf, buf, bsize);
 1521                 }
 1522                 free(vesa_vmem_buf, M_DEVBUF);
 1523                 vesa_vmem_buf = NULL;
 1524         }
 1525         if (((adp_state_t *)p)->sig != V_STATE_SIG)
 1526                 return ((*prevvidsw->load_state)(adp, p));
 1527         return (vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs));
 1528 }
 1529 
 1530 #if 0
 1531 static int
 1532 vesa_get_origin(video_adapter_t *adp, off_t *offset)
 1533 {
 1534         x86regs_t regs;
 1535 
 1536         x86bios_init_regs(&regs);
 1537         regs.R_AX = 0x4f05;
 1538         regs.R_BL = 0x10;
 1539 
 1540         x86bios_intr(&regs, 0x10);
 1541 
 1542         if (regs.R_AX != 0x004f)
 1543                 return (1);
 1544         *offset = regs.DX * adp->va_window_gran;
 1545 
 1546         return (0);
 1547 }
 1548 #endif
 1549 
 1550 static int
 1551 vesa_set_origin(video_adapter_t *adp, off_t offset)
 1552 {
 1553         x86regs_t regs;
 1554 
 1555         /*
 1556          * This function should return as quickly as possible to 
 1557          * maintain good performance of the system. For this reason,
 1558          * error checking is kept minimal and let the VESA BIOS to 
 1559          * detect error.
 1560          */
 1561         if (adp != vesa_adp) 
 1562                 return ((*prevvidsw->set_win_org)(adp, offset));
 1563 
 1564         /* if this is a linear frame buffer, do nothing */
 1565         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1566                 return (0);
 1567         /* XXX */
 1568         if (adp->va_window_gran == 0)
 1569                 return (1);
 1570 
 1571         x86bios_init_regs(&regs);
 1572         regs.R_AX = 0x4f05;
 1573         regs.R_DX = offset / adp->va_window_gran;
 1574         
 1575         x86bios_intr(&regs, 0x10);
 1576 
 1577         if (regs.R_AX != 0x004f)
 1578                 return (1);
 1579 
 1580         x86bios_init_regs(&regs);
 1581         regs.R_AX = 0x4f05;
 1582         regs.R_BL = 1;
 1583         regs.R_DX = offset / adp->va_window_gran;
 1584         x86bios_intr(&regs, 0x10);
 1585 
 1586         adp->va_window_orig = rounddown(offset, adp->va_window_gran);
 1587         return (0);                     /* XXX */
 1588 }
 1589 
 1590 static int
 1591 vesa_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
 1592 {
 1593 
 1594         return ((*prevvidsw->read_hw_cursor)(adp, col, row));
 1595 }
 1596 
 1597 static int
 1598 vesa_set_hw_cursor(video_adapter_t *adp, int col, int row)
 1599 {
 1600 
 1601         return ((*prevvidsw->set_hw_cursor)(adp, col, row));
 1602 }
 1603 
 1604 static int
 1605 vesa_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
 1606                          int celsize, int blink)
 1607 {
 1608 
 1609         return ((*prevvidsw->set_hw_cursor_shape)(adp, base, height, celsize,
 1610             blink));
 1611 }
 1612 
 1613 static int
 1614 vesa_blank_display(video_adapter_t *adp, int mode) 
 1615 {
 1616 
 1617         /* XXX: use VESA DPMS */
 1618         return ((*prevvidsw->blank_display)(adp, mode));
 1619 }
 1620 
 1621 static int
 1622 vesa_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
 1623           int prot, vm_memattr_t *memattr)
 1624 {
 1625 
 1626 #if VESA_DEBUG > 0
 1627         printf("vesa_mmap(): window:0x%tx, buffer:0x%tx, offset:0x%jx\n", 
 1628                adp->va_info.vi_window, adp->va_info.vi_buffer, offset);
 1629 #endif
 1630 
 1631         if ((adp == vesa_adp) &&
 1632             (adp->va_info.vi_flags & V_INFO_LINEAR) != 0) {
 1633                 /* va_window_size == va_buffer_size/vi_planes */
 1634                 /* XXX: is this correct? */
 1635                 if (offset > adp->va_window_size - PAGE_SIZE)
 1636                         return (-1);
 1637                 *paddr = adp->va_info.vi_buffer + offset;
 1638 #ifdef VM_MEMATTR_WRITE_COMBINING
 1639                 *memattr = VM_MEMATTR_WRITE_COMBINING;
 1640 #endif
 1641                 return (0);
 1642         }
 1643         return ((*prevvidsw->mmap)(adp, offset, paddr, prot, memattr));
 1644 }
 1645 
 1646 static int
 1647 vesa_clear(video_adapter_t *adp)
 1648 {
 1649 
 1650         return ((*prevvidsw->clear)(adp));
 1651 }
 1652 
 1653 static int
 1654 vesa_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 1655 {
 1656 
 1657         return ((*prevvidsw->fill_rect)(adp, val, x, y, cx, cy));
 1658 }
 1659 
 1660 static int
 1661 vesa_bitblt(video_adapter_t *adp,...)
 1662 {
 1663 
 1664         /* FIXME */
 1665         return (1);
 1666 }
 1667 
 1668 static int
 1669 get_palette(video_adapter_t *adp, int base, int count,
 1670             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1671 {
 1672         u_char *r;
 1673         u_char *g;
 1674         u_char *b;
 1675         int bits;
 1676         int error;
 1677 
 1678         if (base < 0 || base >= 256 || count < 0 || count > 256)
 1679                 return (1);
 1680         if ((base + count) > 256)
 1681                 return (1);
 1682         if (!VESA_MODE(adp->va_mode))
 1683                 return (1);
 1684 
 1685         bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1686         r = malloc(count * 3, M_DEVBUF, M_WAITOK);
 1687         g = r + count;
 1688         b = g + count;
 1689         error = vesa_bios_save_palette2(base, count, r, g, b, bits);
 1690         if (error == 0) {
 1691                 copyout(r, red, count);
 1692                 copyout(g, green, count);
 1693                 copyout(b, blue, count);
 1694                 if (trans != NULL) {
 1695                         bzero(r, count);
 1696                         copyout(r, trans, count);
 1697                 }
 1698         }
 1699         free(r, M_DEVBUF);
 1700 
 1701         return (error);
 1702 }
 1703 
 1704 static int
 1705 set_palette(video_adapter_t *adp, int base, int count,
 1706             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1707 {
 1708         u_char *r;
 1709         u_char *g;
 1710         u_char *b;
 1711         int bits;
 1712         int error;
 1713 
 1714         if (base < 0 || base >= 256 || count < 0 || count > 256)
 1715                 return (1);
 1716         if ((base + count) > 256)
 1717                 return (1);
 1718         if (!VESA_MODE(adp->va_mode))
 1719                 return (1);
 1720 
 1721         bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
 1722         r = malloc(count * 3, M_DEVBUF, M_WAITOK);
 1723         g = r + count;
 1724         b = g + count;
 1725         copyin(red, r, count);
 1726         copyin(green, g, count);
 1727         copyin(blue, b, count);
 1728 
 1729         error = vesa_bios_load_palette2(base, count, r, g, b, bits);
 1730         free(r, M_DEVBUF);
 1731 
 1732         return (error);
 1733 }
 1734 
 1735 static int
 1736 vesa_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 1737 {
 1738         int bytes;
 1739 
 1740         if (adp != vesa_adp)
 1741                 return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1742 
 1743         switch (cmd) {
 1744         case FBIO_SETWINORG:    /* set frame buffer window origin */
 1745                 if (!VESA_MODE(adp->va_mode))
 1746                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1747                 return (vesa_set_origin(adp, *(off_t *)arg) ? ENODEV : 0);
 1748 
 1749         case FBIO_SETDISPSTART: /* set display start address */
 1750                 if (!VESA_MODE(adp->va_mode))
 1751                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1752                 if (vesa_bios_set_start(((video_display_start_t *)arg)->x,
 1753                                         ((video_display_start_t *)arg)->y))
 1754                         return (ENODEV);
 1755                 adp->va_disp_start.x = ((video_display_start_t *)arg)->x;
 1756                 adp->va_disp_start.y = ((video_display_start_t *)arg)->y;
 1757                 return (0);
 1758 
 1759         case FBIO_SETLINEWIDTH: /* set line length in pixel */
 1760                 if (!VESA_MODE(adp->va_mode))
 1761                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1762                 if (vesa_bios_set_line_length(*(u_int *)arg, &bytes, NULL))
 1763                         return (ENODEV);
 1764                 adp->va_line_width = bytes;
 1765 #if VESA_DEBUG > 1
 1766                 printf("new line width:%d\n", adp->va_line_width);
 1767 #endif
 1768                 return (0);
 1769 
 1770         case FBIO_GETPALETTE:   /* get color palette */
 1771                 if (get_palette(adp, ((video_color_palette_t *)arg)->index,
 1772                                 ((video_color_palette_t *)arg)->count,
 1773                                 ((video_color_palette_t *)arg)->red,
 1774                                 ((video_color_palette_t *)arg)->green,
 1775                                 ((video_color_palette_t *)arg)->blue,
 1776                                 ((video_color_palette_t *)arg)->transparent))
 1777                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1778                 return (0);
 1779 
 1780 
 1781         case FBIO_SETPALETTE:   /* set color palette */
 1782                 if (set_palette(adp, ((video_color_palette_t *)arg)->index,
 1783                                 ((video_color_palette_t *)arg)->count,
 1784                                 ((video_color_palette_t *)arg)->red,
 1785                                 ((video_color_palette_t *)arg)->green,
 1786                                 ((video_color_palette_t *)arg)->blue,
 1787                                 ((video_color_palette_t *)arg)->transparent))
 1788                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1789                 return (0);
 1790 
 1791         case FBIOGETCMAP:       /* get color palette */
 1792                 if (get_palette(adp, ((struct fbcmap *)arg)->index,
 1793                                 ((struct fbcmap *)arg)->count,
 1794                                 ((struct fbcmap *)arg)->red,
 1795                                 ((struct fbcmap *)arg)->green,
 1796                                 ((struct fbcmap *)arg)->blue, NULL))
 1797                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1798                 return (0);
 1799 
 1800         case FBIOPUTCMAP:       /* set color palette */
 1801                 if (set_palette(adp, ((struct fbcmap *)arg)->index,
 1802                                 ((struct fbcmap *)arg)->count,
 1803                                 ((struct fbcmap *)arg)->red,
 1804                                 ((struct fbcmap *)arg)->green,
 1805                                 ((struct fbcmap *)arg)->blue, NULL))
 1806                         return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1807                 return (0);
 1808 
 1809         default:
 1810                 return ((*prevvidsw->ioctl)(adp, cmd, arg));
 1811         }
 1812 }
 1813 
 1814 static int
 1815 vesa_diag(video_adapter_t *adp, int level)
 1816 {
 1817         int error;
 1818 
 1819         /* call the previous handler first */
 1820         error = (*prevvidsw->diag)(adp, level);
 1821         if (error)
 1822                 return (error);
 1823 
 1824         if (adp != vesa_adp)
 1825                 return (1);
 1826 
 1827         if (level <= 0)
 1828                 return (0);
 1829 
 1830         return (0);
 1831 }
 1832 
 1833 static int
 1834 vesa_bios_info(int level)
 1835 {
 1836 #if VESA_DEBUG > 1
 1837         struct vesa_mode vmode;
 1838         int i;
 1839 #endif
 1840         uint16_t vers;
 1841 
 1842         vers = vesa_adp_info->v_version;
 1843 
 1844         if (bootverbose) {
 1845                 /* general adapter information */
 1846                 printf(
 1847         "VESA: v%d.%d, %dk memory, flags:0x%x, mode table:%p (%x)\n", 
 1848                     (vers >> 12) * 10 + ((vers & 0x0f00) >> 8),
 1849                     ((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f),
 1850                     vesa_adp_info->v_memsize * 64, vesa_adp_info->v_flags,
 1851                     vesa_vmodetab, vesa_adp_info->v_modetable);
 1852 
 1853                 /* OEM string */
 1854                 if (vesa_oemstr != NULL)
 1855                         printf("VESA: %s\n", vesa_oemstr);
 1856         }
 1857 
 1858         if (level <= 0)
 1859                 return (0);
 1860 
 1861         if (vers >= 0x0200 && bootverbose) {
 1862                 /* vender name, product name, product revision */
 1863                 printf("VESA: %s %s %s\n",
 1864                         (vesa_venderstr != NULL) ? vesa_venderstr : "unknown",
 1865                         (vesa_prodstr != NULL) ? vesa_prodstr : "unknown",
 1866                         (vesa_revstr != NULL) ? vesa_revstr : "?");
 1867         }
 1868 
 1869 #if VESA_DEBUG > 1
 1870         /* mode information */
 1871         for (i = 0;
 1872                 (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
 1873                 && (vesa_vmodetab[i] != 0xffff); ++i) {
 1874                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_NOWAIT))
 1875                         continue;
 1876 
 1877                 /* print something for diagnostic purpose */
 1878                 printf("VESA: mode:0x%03x, flags:0x%04x", 
 1879                        vesa_vmodetab[i], vmode.v_modeattr);
 1880                 if (vmode.v_modeattr & V_MODEOPTINFO) {
 1881                         if (vmode.v_modeattr & V_MODEGRAPHICS) {
 1882                                 printf(", G %dx%dx%d %d, ", 
 1883                                        vmode.v_width, vmode.v_height,
 1884                                        vmode.v_bpp, vmode.v_planes);
 1885                         } else {
 1886                                 printf(", T %dx%d, ", 
 1887                                        vmode.v_width, vmode.v_height);
 1888                         }
 1889                         printf("font:%dx%d, ", 
 1890                                vmode.v_cwidth, vmode.v_cheight);
 1891                         printf("pages:%d, mem:%d",
 1892                                vmode.v_ipages + 1, vmode.v_memmodel);
 1893                 }
 1894                 if (vmode.v_modeattr & V_MODELFB) {
 1895                         printf("\nVESA: LFB:0x%x, off:0x%x, off_size:0x%x", 
 1896                                vmode.v_lfb, vmode.v_offscreen,
 1897                                vmode.v_offscreensize*1024);
 1898                 }
 1899                 printf("\n");
 1900                 printf("VESA: window A:0x%x (%x), window B:0x%x (%x), ",
 1901                        vmode.v_waseg, vmode.v_waattr,
 1902                        vmode.v_wbseg, vmode.v_wbattr);
 1903                 printf("size:%dk, gran:%dk\n",
 1904                        vmode.v_wsize, vmode.v_wgran);
 1905         }
 1906 #endif /* VESA_DEBUG > 1 */
 1907 
 1908         return (0);
 1909 }
 1910 
 1911 /* module loading */
 1912 
 1913 static int
 1914 vesa_load(void)
 1915 {
 1916         int error;
 1917 
 1918         if (vesa_init_done)
 1919                 return (0);
 1920 
 1921         /* locate a VGA adapter */
 1922         vesa_adp = NULL;
 1923         error = vesa_configure(0);
 1924 
 1925         if (error == 0)
 1926                 vesa_bios_info(bootverbose);
 1927 
 1928         return (error);
 1929 }
 1930 
 1931 static int
 1932 vesa_unload(void)
 1933 {
 1934         u_char palette[256*3];
 1935         int error;
 1936 
 1937         /* if the adapter is currently in a VESA mode, don't unload */
 1938         if ((vesa_adp != NULL) && VESA_MODE(vesa_adp->va_mode))
 1939                 return (EBUSY);
 1940         /* 
 1941          * FIXME: if there is at least one vty which is in a VESA mode,
 1942          * we shouldn't be unloading! XXX
 1943          */
 1944 
 1945         if ((error = vesa_unload_ioctl()) == 0) {
 1946                 if (vesa_adp != NULL) {
 1947                         if ((vesa_adp->va_flags & V_ADP_DAC8) != 0) {
 1948                                 vesa_bios_save_palette(0, 256, palette, 8);
 1949                                 vesa_bios_set_dac(6);
 1950                                 vesa_adp->va_flags &= ~V_ADP_DAC8;
 1951                                 vesa_bios_load_palette(0, 256, palette, 6);
 1952                         }
 1953                         vesa_adp->va_flags &= ~V_ADP_VESA;
 1954                         vidsw[vesa_adp->va_index] = prevvidsw;
 1955                 }
 1956         }
 1957 
 1958         vesa_bios_uninit();
 1959 
 1960         return (error);
 1961 }
 1962 
 1963 static int
 1964 vesa_mod_event(module_t mod, int type, void *data)
 1965 {
 1966 
 1967         switch (type) {
 1968         case MOD_LOAD:
 1969                 return (vesa_load());
 1970         case MOD_UNLOAD:
 1971                 return (vesa_unload());
 1972         }
 1973         return (EOPNOTSUPP);
 1974 }
 1975 
 1976 static moduledata_t vesa_mod = {
 1977         "vesa",
 1978         vesa_mod_event,
 1979         NULL,
 1980 };
 1981 
 1982 DECLARE_MODULE(vesa, vesa_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
 1983 MODULE_DEPEND(vesa, x86bios, 1, 1, 1);
 1984 
 1985 #endif  /* VGA_NO_MODE_CHANGE */

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