The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/vesa.c

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    1 /*-
    2  * Copyright (c) 1998 Kazutaka YOKOTA and Michael Smith
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #include "opt_vga.h"
   30 
   31 #ifndef VGA_NO_MODE_CHANGE
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/malloc.h>
   38 #include <sys/fbio.h>
   39 
   40 #include <vm/vm.h>
   41 #include <vm/vm_extern.h>
   42 #include <vm/vm_kern.h>
   43 #include <vm/pmap.h>
   44 
   45 #include <machine/md_var.h>
   46 #include <machine/vm86.h>
   47 #include <machine/pc/bios.h>
   48 #include <machine/pc/vesa.h>
   49 
   50 #include <dev/fb/fbreg.h>
   51 #include <dev/fb/vgareg.h>
   52 
   53 #ifndef __i386__
   54 #include <isa/isareg.h>
   55 #else
   56 #include <i386/isa/isa.h>
   57 #endif
   58 
   59 #ifndef VESA_DEBUG
   60 #define VESA_DEBUG      0
   61 #endif
   62 
   63 /* VESA video adapter state buffer stub */
   64 struct adp_state {
   65         int             sig;
   66 #define V_STATE_SIG     0x61736576
   67         u_char          regs[1];
   68 };
   69 typedef struct adp_state adp_state_t;
   70 
   71 /* VESA video adapter */
   72 static video_adapter_t *vesa_adp = NULL;
   73 static int vesa_state_buf_size = 0;
   74 
   75 /* VESA functions */
   76 #if 0
   77 static int                      vesa_nop(void);
   78 #endif
   79 static int                      vesa_error(void);
   80 static vi_probe_t               vesa_probe;
   81 static vi_init_t                vesa_init;
   82 static vi_get_info_t            vesa_get_info;
   83 static vi_query_mode_t          vesa_query_mode;
   84 static vi_set_mode_t            vesa_set_mode;
   85 static vi_save_font_t           vesa_save_font;
   86 static vi_load_font_t           vesa_load_font;
   87 static vi_show_font_t           vesa_show_font;
   88 static vi_save_palette_t        vesa_save_palette;
   89 static vi_load_palette_t        vesa_load_palette;
   90 static vi_set_border_t          vesa_set_border;
   91 static vi_save_state_t          vesa_save_state;
   92 static vi_load_state_t          vesa_load_state;
   93 static vi_set_win_org_t         vesa_set_origin;
   94 static vi_read_hw_cursor_t      vesa_read_hw_cursor;
   95 static vi_set_hw_cursor_t       vesa_set_hw_cursor;
   96 static vi_set_hw_cursor_shape_t vesa_set_hw_cursor_shape;
   97 static vi_blank_display_t       vesa_blank_display;
   98 static vi_mmap_t                vesa_mmap;
   99 static vi_ioctl_t               vesa_ioctl;
  100 static vi_clear_t               vesa_clear;
  101 static vi_fill_rect_t           vesa_fill_rect;
  102 static vi_bitblt_t              vesa_bitblt;
  103 static vi_diag_t                vesa_diag;
  104 static int                      vesa_bios_info(int level);
  105 static struct vm86context       vesa_vmcontext;
  106 
  107 static video_switch_t vesavidsw = {
  108         vesa_probe,
  109         vesa_init,
  110         vesa_get_info,
  111         vesa_query_mode,
  112         vesa_set_mode,
  113         vesa_save_font,
  114         vesa_load_font,
  115         vesa_show_font,
  116         vesa_save_palette,
  117         vesa_load_palette,
  118         vesa_set_border,
  119         vesa_save_state,
  120         vesa_load_state,
  121         vesa_set_origin,
  122         vesa_read_hw_cursor,
  123         vesa_set_hw_cursor,
  124         vesa_set_hw_cursor_shape,
  125         vesa_blank_display,
  126         vesa_mmap,
  127         vesa_ioctl,
  128         vesa_clear,
  129         vesa_fill_rect,
  130         vesa_bitblt,
  131         vesa_error,
  132         vesa_error,
  133         vesa_diag,
  134 };
  135 
  136 static video_switch_t *prevvidsw;
  137 
  138 /* VESA BIOS video modes */
  139 #define VESA_MAXMODES   64
  140 #define EOT             (-1)
  141 #define NA              (-2)
  142 
  143 #define MODE_TABLE_DELTA 8
  144 
  145 static int vesa_vmode_max = 0;
  146 static video_info_t vesa_vmode_empty = { EOT };
  147 static video_info_t *vesa_vmode = &vesa_vmode_empty;
  148 
  149 static int vesa_init_done = FALSE;
  150 static int has_vesa_bios = FALSE;
  151 static struct vesa_info *vesa_adp_info = NULL;
  152 static u_int16_t *vesa_vmodetab = NULL;
  153 static char *vesa_oemstr = NULL;
  154 static char *vesa_venderstr = NULL;
  155 static char *vesa_prodstr = NULL;
  156 static char *vesa_revstr = NULL;
  157 
  158 /* local macros and functions */
  159 #define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
  160 
  161 static int int10_set_mode(int mode);
  162 static int vesa_bios_get_mode(int mode, struct vesa_mode *vmode);
  163 static int vesa_bios_set_mode(int mode);
  164 static int vesa_bios_get_dac(void);
  165 static int vesa_bios_set_dac(int bits);
  166 static int vesa_bios_save_palette(int start, int colors, u_char *palette,
  167                                   int bits);
  168 static int vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g,
  169                                    u_char *b, int bits);
  170 static int vesa_bios_load_palette(int start, int colors, u_char *palette,
  171                                   int bits);
  172 #ifdef notyet
  173 static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
  174                                    u_char *b, int bits);
  175 #endif
  176 #define STATE_SIZE      0
  177 #define STATE_SAVE      1
  178 #define STATE_LOAD      2
  179 #define STATE_HW        (1<<0)
  180 #define STATE_DATA      (1<<1)
  181 #define STATE_DAC       (1<<2)
  182 #define STATE_REG       (1<<3)
  183 #define STATE_MOST      (STATE_HW | STATE_DATA | STATE_REG)
  184 #define STATE_ALL       (STATE_HW | STATE_DATA | STATE_DAC | STATE_REG)
  185 static int vesa_bios_state_buf_size(void);
  186 static int vesa_bios_save_restore(int code, void *p, size_t size);
  187 static int vesa_bios_get_line_length(void);
  188 static int vesa_bios_set_line_length(int pixel, int *bytes, int *lines);
  189 #if 0
  190 static int vesa_bios_get_start(int *x, int *y);
  191 #endif
  192 static int vesa_bios_set_start(int x, int y);
  193 static int vesa_map_gen_mode_num(int type, int color, int mode);
  194 static int vesa_translate_flags(u_int16_t vflags);
  195 static int vesa_translate_mmodel(u_int8_t vmodel);
  196 static void *vesa_fix_ptr(u_int32_t p, u_int16_t seg, u_int16_t off, 
  197                           u_char *buf);
  198 static int vesa_bios_init(void);
  199 static void vesa_clear_modes(video_info_t *info, int color);
  200 static vm_offset_t vesa_map_buffer(u_int paddr, size_t size);
  201 static void vesa_unmap_buffer(vm_offset_t vaddr, size_t size);
  202 
  203 #if 0
  204 static int vesa_get_origin(video_adapter_t *adp, off_t *offset);
  205 #endif
  206 
  207 static void
  208 dump_buffer(u_char *buf, size_t len)
  209 {
  210     int i;
  211 
  212     for(i = 0; i < len;) {
  213         printf("%02x ", buf[i]);
  214         if ((++i % 16) == 0)
  215             printf("\n");
  216     }
  217 }
  218 
  219 /* INT 10 BIOS calls */
  220 static int
  221 int10_set_mode(int mode)
  222 {
  223         struct vm86frame vmf;
  224 
  225         bzero(&vmf, sizeof(vmf));
  226         vmf.vmf_eax = 0x0000 | mode;
  227         vm86_intcall(0x10, &vmf);
  228         return 0;
  229 }
  230 
  231 /* VESA BIOS calls */
  232 static int
  233 vesa_bios_get_mode(int mode, struct vesa_mode *vmode)
  234 {
  235         struct vm86frame vmf;
  236         u_char *buf;
  237         int err;
  238 
  239         bzero(&vmf, sizeof(vmf));
  240         vmf.vmf_eax = 0x4f01; 
  241         vmf.vmf_ecx = mode;
  242         buf = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  243         vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_di);
  244 
  245         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  246         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  247                 return 1;
  248         bcopy(buf, vmode, sizeof(*vmode));
  249         return 0;
  250 }
  251 
  252 static int
  253 vesa_bios_set_mode(int mode)
  254 {
  255         struct vm86frame vmf;
  256         int err;
  257 
  258         bzero(&vmf, sizeof(vmf));
  259         vmf.vmf_eax = 0x4f02;
  260         vmf.vmf_ebx = mode;
  261         err = vm86_intcall(0x10, &vmf);
  262         return ((err != 0) || (vmf.vmf_ax != 0x4f));
  263 }
  264 
  265 static int
  266 vesa_bios_get_dac(void)
  267 {
  268         struct vm86frame vmf;
  269         int err;
  270 
  271         bzero(&vmf, sizeof(vmf));
  272         vmf.vmf_eax = 0x4f08;
  273         vmf.vmf_ebx = 1;        /* get DAC width */
  274         err = vm86_intcall(0x10, &vmf);
  275         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  276                 return 6;       /* XXX */
  277         return ((vmf.vmf_ebx >> 8) & 0x00ff);
  278 }
  279 
  280 static int
  281 vesa_bios_set_dac(int bits)
  282 {
  283         struct vm86frame vmf;
  284         int err;
  285 
  286         bzero(&vmf, sizeof(vmf));
  287         vmf.vmf_eax = 0x4f08;
  288         vmf.vmf_ebx = (bits << 8);
  289         err = vm86_intcall(0x10, &vmf);
  290         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  291                 return 6;       /* XXX */
  292         return ((vmf.vmf_ebx >> 8) & 0x00ff);
  293 }
  294 
  295 static int
  296 vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
  297 {
  298         struct vm86frame vmf;
  299         u_char *p;
  300         int err;
  301         int i;
  302 
  303         bzero(&vmf, sizeof(vmf));
  304         vmf.vmf_eax = 0x4f09;
  305         vmf.vmf_ebx = 1;        /* get primary palette data */
  306         vmf.vmf_ecx = colors;
  307         vmf.vmf_edx = start;
  308         p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  309         vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
  310 
  311         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  312         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  313                 return 1;
  314 
  315         bits = 8 - bits;
  316         for (i = 0; i < colors; ++i) {
  317                 palette[i*3]     = p[i*4 + 2] << bits;
  318                 palette[i*3 + 1] = p[i*4 + 1] << bits;
  319                 palette[i*3 + 2] = p[i*4] << bits;
  320         }
  321         return 0;
  322 }
  323 
  324 static int
  325 vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  326                         int bits)
  327 {
  328         struct vm86frame vmf;
  329         u_char *p;
  330         int err;
  331         int i;
  332 
  333         bzero(&vmf, sizeof(vmf));
  334         vmf.vmf_eax = 0x4f09;
  335         vmf.vmf_ebx = 1;        /* get primary palette data */
  336         vmf.vmf_ecx = colors;
  337         vmf.vmf_edx = start;
  338         p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  339         vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
  340 
  341         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  342         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  343                 return 1;
  344 
  345         bits = 8 - bits;
  346         for (i = 0; i < colors; ++i) {
  347                 r[i] = p[i*4 + 2] << bits;
  348                 g[i] = p[i*4 + 1] << bits;
  349                 b[i] = p[i*4] << bits;
  350         }
  351         return 0;
  352 }
  353 
  354 static int
  355 vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
  356 {
  357         struct vm86frame vmf;
  358         u_char *p;
  359         int err;
  360         int i;
  361 
  362         p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  363         bits = 8 - bits;
  364         for (i = 0; i < colors; ++i) {
  365                 p[i*4]     = palette[i*3 + 2] >> bits;
  366                 p[i*4 + 1] = palette[i*3 + 1] >> bits;
  367                 p[i*4 + 2] = palette[i*3] >> bits;
  368                 p[i*4 + 3] = 0;
  369         }
  370 
  371         bzero(&vmf, sizeof(vmf));
  372         vmf.vmf_eax = 0x4f09;
  373         vmf.vmf_ebx = 0;        /* set primary palette data */
  374         vmf.vmf_ecx = colors;
  375         vmf.vmf_edx = start;
  376         vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
  377 
  378         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  379         return ((err != 0) || (vmf.vmf_ax != 0x4f));
  380 }
  381 
  382 #ifdef notyet
  383 static int
  384 vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
  385                         int bits)
  386 {
  387         struct vm86frame vmf;
  388         u_char *p;
  389         int err;
  390         int i;
  391 
  392         p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  393         bits = 8 - bits;
  394         for (i = 0; i < colors; ++i) {
  395                 p[i*4]     = b[i] >> bits;
  396                 p[i*4 + 1] = g[i] >> bits;
  397                 p[i*4 + 2] = r[i] >> bits;
  398                 p[i*4 + 3] = 0;
  399         }
  400 
  401         bzero(&vmf, sizeof(vmf));
  402         vmf.vmf_eax = 0x4f09;
  403         vmf.vmf_ebx = 0;        /* set primary palette data */
  404         vmf.vmf_ecx = colors;
  405         vmf.vmf_edx = start;
  406         vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
  407 
  408         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  409         return ((err != 0) || (vmf.vmf_ax != 0x4f));
  410 }
  411 #endif
  412 
  413 static int
  414 vesa_bios_state_buf_size(void)
  415 {
  416         struct vm86frame vmf;
  417         int err;
  418 
  419         bzero(&vmf, sizeof(vmf));
  420         vmf.vmf_eax = 0x4f04; 
  421         vmf.vmf_ecx = STATE_MOST;
  422         vmf.vmf_edx = STATE_SIZE;
  423         err = vm86_intcall(0x10, &vmf);
  424         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  425                 return 0;
  426         return vmf.vmf_bx*64;
  427 }
  428 
  429 static int
  430 vesa_bios_save_restore(int code, void *p, size_t size)
  431 {
  432         struct vm86frame vmf;
  433         u_char *buf;
  434         int err;
  435 
  436         bzero(&vmf, sizeof(vmf));
  437         vmf.vmf_eax = 0x4f04; 
  438         vmf.vmf_ecx = STATE_MOST;
  439         vmf.vmf_edx = code;     /* STATE_SAVE/STATE_LOAD */
  440         buf = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
  441         vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_di);
  442         bcopy(p, buf, size);
  443 
  444         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  445         return ((err != 0) || (vmf.vmf_ax != 0x4f));
  446 }
  447 
  448 static int
  449 vesa_bios_get_line_length(void)
  450 {
  451         struct vm86frame vmf;
  452         int err;
  453 
  454         bzero(&vmf, sizeof(vmf));
  455         vmf.vmf_eax = 0x4f06; 
  456         vmf.vmf_ebx = 1;        /* get scan line length */
  457         err = vm86_intcall(0x10, &vmf);
  458         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  459                 return -1;
  460         return vmf.vmf_bx;      /* line length in bytes */
  461 }
  462 
  463 static int
  464 vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
  465 {
  466         struct vm86frame vmf;
  467         int err;
  468 
  469         bzero(&vmf, sizeof(vmf));
  470         vmf.vmf_eax = 0x4f06; 
  471         vmf.vmf_ebx = 0;        /* set scan line length in pixel */
  472         vmf.vmf_ecx = pixel;
  473         err = vm86_intcall(0x10, &vmf);
  474 #if VESA_DEBUG > 1
  475         printf("bx:%d, cx:%d, dx:%d\n", vmf.vmf_bx, vmf.vmf_cx, vmf.vmf_dx); 
  476 #endif
  477         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  478                 return 1;
  479         if (bytes)
  480                 *bytes = vmf.vmf_bx;
  481         if (lines)
  482                 *lines = vmf.vmf_dx;
  483         return 0;
  484 }
  485 
  486 #if 0
  487 static int
  488 vesa_bios_get_start(int *x, int *y)
  489 {
  490         struct vm86frame vmf;
  491         int err;
  492 
  493         bzero(&vmf, sizeof(vmf));
  494         vmf.vmf_eax = 0x4f07; 
  495         vmf.vmf_ebx = 1;        /* get display start */
  496         err = vm86_intcall(0x10, &vmf);
  497         if ((err != 0) || (vmf.vmf_ax != 0x4f))
  498                 return 1;
  499         *x = vmf.vmf_cx;
  500         *y = vmf.vmf_dx;
  501         return 0;
  502 }
  503 #endif
  504 
  505 static int
  506 vesa_bios_set_start(int x, int y)
  507 {
  508         struct vm86frame vmf;
  509         int err;
  510 
  511         bzero(&vmf, sizeof(vmf));
  512         vmf.vmf_eax = 0x4f07; 
  513         vmf.vmf_ebx = 0x80;     /* set display start */
  514         vmf.vmf_edx = y;
  515         vmf.vmf_ecx = x;
  516         err = vm86_intcall(0x10, &vmf);
  517         return ((err != 0) || (vmf.vmf_ax != 0x4f));
  518 }
  519 
  520 /* map a generic video mode to a known mode */
  521 static int
  522 vesa_map_gen_mode_num(int type, int color, int mode)
  523 {
  524     static struct {
  525         int from;
  526         int to;
  527     } mode_map[] = {
  528         { M_TEXT_132x25, M_VESA_C132x25 },
  529         { M_TEXT_132x43, M_VESA_C132x43 },
  530         { M_TEXT_132x50, M_VESA_C132x50 },
  531         { M_TEXT_132x60, M_VESA_C132x60 },
  532     };
  533     int i;
  534 
  535     for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
  536         if (mode_map[i].from == mode)
  537             return mode_map[i].to;
  538     }
  539     return mode;
  540 }
  541 
  542 static int
  543 vesa_translate_flags(u_int16_t vflags)
  544 {
  545         static struct {
  546                 u_int16_t mask;
  547                 int set;
  548                 int reset;
  549         } ftable[] = {
  550                 { V_MODECOLOR, V_INFO_COLOR, 0 },
  551                 { V_MODEGRAPHICS, V_INFO_GRAPHICS, 0 },
  552                 { V_MODELFB, V_INFO_LINEAR, 0 },
  553         };
  554         int flags;
  555         int i;
  556 
  557         for (flags = 0, i = 0; i < sizeof(ftable)/sizeof(ftable[0]); ++i) {
  558                 flags |= (vflags & ftable[i].mask) ? 
  559                          ftable[i].set : ftable[i].reset;
  560         }
  561         return flags;
  562 }
  563 
  564 static int
  565 vesa_translate_mmodel(u_int8_t vmodel)
  566 {
  567         static struct {
  568                 u_int8_t vmodel;
  569                 int mmodel;
  570         } mtable[] = {
  571                 { V_MMTEXT,     V_INFO_MM_TEXT },
  572                 { V_MMCGA,      V_INFO_MM_CGA },
  573                 { V_MMHGC,      V_INFO_MM_HGC },
  574                 { V_MMEGA,      V_INFO_MM_PLANAR },
  575                 { V_MMPACKED,   V_INFO_MM_PACKED },
  576                 { V_MMDIRCOLOR, V_INFO_MM_DIRECT },
  577         };
  578         int i;
  579 
  580         for (i = 0; mtable[i].mmodel >= 0; ++i) {
  581                 if (mtable[i].vmodel == vmodel)
  582                         return mtable[i].mmodel;
  583         }
  584         return V_INFO_MM_OTHER;
  585 }
  586 
  587 static void
  588 *vesa_fix_ptr(u_int32_t p, u_int16_t seg, u_int16_t off, u_char *buf)
  589 {
  590         if (p == 0)
  591                 return NULL;
  592         if (((p >> 16) == seg) && ((p & 0xffff) >= off))
  593                 return (void *)(buf + ((p & 0xffff) - off));
  594         else {
  595                 p = BIOS_SADDRTOLADDR(p);
  596                 return (void *)BIOS_PADDRTOVADDR(p);
  597         }
  598 }
  599 
  600 static int
  601 vesa_bios_init(void)
  602 {
  603         static u_char buf[512];
  604         struct vm86frame vmf;
  605         struct vesa_mode vmode;
  606         video_info_t *p;
  607         u_char *vmbuf;
  608         int modes;
  609         int err;
  610         int i;
  611 
  612         if (vesa_init_done)
  613                 return 0;
  614 
  615         has_vesa_bios = FALSE;
  616         vesa_adp_info = NULL;
  617         vesa_vmode_max = 0;
  618         vesa_vmode[0].vi_mode = EOT;
  619 
  620         vmbuf = (u_char *)vm86_addpage(&vesa_vmcontext, 1, 0);
  621         bzero(&vmf, sizeof(vmf));       /* paranoia */
  622         bcopy("VBE2", vmbuf, 4);        /* try for VBE2 data */
  623         vmf.vmf_eax = 0x4f00;
  624         vm86_getptr(&vesa_vmcontext, (vm_offset_t)vmbuf, &vmf.vmf_es, &vmf.vmf_di);
  625 
  626         err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
  627         if ((err != 0) || (vmf.vmf_ax != 0x4f) || bcmp("VESA", vmbuf, 4))
  628                 return 1;
  629         bcopy(vmbuf, buf, sizeof(buf));
  630         vesa_adp_info = (struct vesa_info *)buf;
  631         if (bootverbose) {
  632                 printf("VESA: information block\n");
  633                 dump_buffer(buf, 64);
  634         }
  635         if (vesa_adp_info->v_flags & V_NONVGA)
  636                 return 1;
  637         if (vesa_adp_info->v_version < 0x0102) {
  638                 printf("VESA: VBE version %d.%d is not supported; "
  639                        "version 1.2 or later is required.\n",
  640                        ((vesa_adp_info->v_version & 0xf000) >> 12) * 10 
  641                            + ((vesa_adp_info->v_version & 0x0f00) >> 8),
  642                        ((vesa_adp_info->v_version & 0x00f0) >> 4) * 10 
  643                            + (vesa_adp_info->v_version & 0x000f));
  644                 return 1;
  645         }
  646 
  647         /* fix string ptrs */
  648         vesa_oemstr = (char *)vesa_fix_ptr(vesa_adp_info->v_oemstr,
  649                                            vmf.vmf_es, vmf.vmf_di, buf);
  650         if (vesa_adp_info->v_version >= 0x0200) {
  651                 vesa_venderstr = 
  652                     (char *)vesa_fix_ptr(vesa_adp_info->v_venderstr,
  653                                          vmf.vmf_es, vmf.vmf_di, buf);
  654                 vesa_prodstr = 
  655                     (char *)vesa_fix_ptr(vesa_adp_info->v_prodstr,
  656                                          vmf.vmf_es, vmf.vmf_di, buf);
  657                 vesa_revstr = 
  658                     (char *)vesa_fix_ptr(vesa_adp_info->v_revstr,
  659                                          vmf.vmf_es, vmf.vmf_di, buf);
  660         }
  661 
  662         /* obtain video mode information */
  663         vesa_vmodetab = (u_int16_t *)vesa_fix_ptr(vesa_adp_info->v_modetable,
  664                                                   vmf.vmf_es, vmf.vmf_di, buf);
  665         if (vesa_vmodetab == NULL)
  666                 return 1;
  667         for (i = 0, modes = 0; 
  668                 (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
  669                 && (vesa_vmodetab[i] != 0xffff); ++i) {
  670                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode))
  671                         continue;
  672 
  673                 /* reject unsupported modes */
  674 #if 0
  675                 if ((vmode.v_modeattr & (V_MODESUPP | V_MODEOPTINFO 
  676                                         | V_MODENONVGA))
  677                     != (V_MODESUPP | V_MODEOPTINFO))
  678                         continue;
  679 #else
  680                 if ((vmode.v_modeattr & (V_MODEOPTINFO | V_MODENONVGA))
  681                     != (V_MODEOPTINFO))
  682                         continue;
  683 #endif
  684 
  685                 /* expand the array if necessary */
  686                 if (modes >= vesa_vmode_max) {
  687                         vesa_vmode_max += MODE_TABLE_DELTA;
  688                         p = malloc(sizeof(*vesa_vmode)*(vesa_vmode_max + 1),
  689                                    M_DEVBUF, M_WAITOK);
  690 #if VESA_DEBUG > 1
  691                         printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
  692                                modes, vesa_vmode_max);
  693 #endif
  694                         if (modes > 0) {
  695                                 bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
  696                                 free(vesa_vmode, M_DEVBUF);
  697                         }
  698                         vesa_vmode = p;
  699                 }
  700 
  701                 /* copy some fields */
  702                 bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
  703                 vesa_vmode[modes].vi_mode = vesa_vmodetab[i];
  704                 vesa_vmode[modes].vi_width = vmode.v_width;
  705                 vesa_vmode[modes].vi_height = vmode.v_height;
  706                 vesa_vmode[modes].vi_depth = vmode.v_bpp;
  707                 vesa_vmode[modes].vi_planes = vmode.v_planes;
  708                 vesa_vmode[modes].vi_cwidth = vmode.v_cwidth;
  709                 vesa_vmode[modes].vi_cheight = vmode.v_cheight;
  710                 vesa_vmode[modes].vi_window = (u_int)vmode.v_waseg << 4;
  711                 /* XXX window B */
  712                 vesa_vmode[modes].vi_window_size = vmode.v_wsize*1024;
  713                 vesa_vmode[modes].vi_window_gran = vmode.v_wgran*1024;
  714                 if (vmode.v_modeattr & V_MODELFB)
  715                         vesa_vmode[modes].vi_buffer = vmode.v_lfb;
  716                 else
  717                         vesa_vmode[modes].vi_buffer = 0;
  718                 /* XXX */
  719                 vesa_vmode[modes].vi_buffer_size
  720                         = vesa_adp_info->v_memsize*64*1024;
  721 #if 0
  722                 if (vmode.v_offscreen > vmode.v_lfb)
  723                         vesa_vmode[modes].vi_buffer_size
  724                                 = vmode.v_offscreen + vmode.v_offscreensize*1024
  725                                       - vmode.v_lfb;
  726                 else
  727                         vesa_vmode[modes].vi_buffer_size
  728                                 = vmode.v_offscreen + vmode.v_offscreensize*1024
  729 #endif
  730                 vesa_vmode[modes].vi_mem_model 
  731                         = vesa_translate_mmodel(vmode.v_memmodel);
  732                 vesa_vmode[modes].vi_pixel_fields[0] = 0;
  733                 vesa_vmode[modes].vi_pixel_fields[1] = 0;
  734                 vesa_vmode[modes].vi_pixel_fields[2] = 0;
  735                 vesa_vmode[modes].vi_pixel_fields[3] = 0;
  736                 vesa_vmode[modes].vi_pixel_fsizes[0] = 0;
  737                 vesa_vmode[modes].vi_pixel_fsizes[1] = 0;
  738                 vesa_vmode[modes].vi_pixel_fsizes[2] = 0;
  739                 vesa_vmode[modes].vi_pixel_fsizes[3] = 0;
  740                 if (vesa_vmode[modes].vi_mem_model == V_INFO_MM_PACKED) {
  741                         vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7)/8;
  742                 } else if (vesa_vmode[modes].vi_mem_model == V_INFO_MM_DIRECT) {
  743                         vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7)/8;
  744                         vesa_vmode[modes].vi_pixel_fields[0]
  745                             = vmode.v_redfieldpos;
  746                         vesa_vmode[modes].vi_pixel_fields[1]
  747                             = vmode.v_greenfieldpos;
  748                         vesa_vmode[modes].vi_pixel_fields[2]
  749                             = vmode.v_bluefieldpos;
  750                         vesa_vmode[modes].vi_pixel_fields[3]
  751                             = vmode.v_resfieldpos;
  752                         vesa_vmode[modes].vi_pixel_fsizes[0]
  753                             = vmode.v_redmasksize;
  754                         vesa_vmode[modes].vi_pixel_fsizes[1]
  755                             = vmode.v_greenmasksize;
  756                         vesa_vmode[modes].vi_pixel_fsizes[2]
  757                             = vmode.v_bluemasksize;
  758                         vesa_vmode[modes].vi_pixel_fsizes[3]
  759                             = vmode.v_resmasksize;
  760                 } else {
  761                         vesa_vmode[modes].vi_pixel_size = 0;
  762                 }
  763                 
  764                 vesa_vmode[modes].vi_flags 
  765                         = vesa_translate_flags(vmode.v_modeattr) | V_INFO_VESA;
  766                 ++modes;
  767         }
  768         vesa_vmode[modes].vi_mode = EOT;
  769         if (bootverbose)
  770                 printf("VESA: %d mode(s) found\n", modes);
  771 
  772         has_vesa_bios = (modes > 0);
  773         return (has_vesa_bios ? 0 : 1);
  774 }
  775 
  776 static void
  777 vesa_clear_modes(video_info_t *info, int color)
  778 {
  779         while (info->vi_mode != EOT) {
  780                 if ((info->vi_flags & V_INFO_COLOR) != color)
  781                         info->vi_mode = NA;
  782                 ++info;
  783         }
  784 }
  785 
  786 static vm_offset_t
  787 vesa_map_buffer(u_int paddr, size_t size)
  788 {
  789         vm_offset_t vaddr;
  790         u_int off;
  791 
  792         off = paddr - trunc_page(paddr);
  793         vaddr = (vm_offset_t)pmap_mapdev(paddr - off, size + off);
  794 #if VESA_DEBUG > 1
  795         printf("vesa_map_buffer: paddr:%x vaddr:%x size:%x off:%x\n",
  796                paddr, vaddr, size, off);
  797 #endif
  798         return (vaddr + off);
  799 }
  800 
  801 static void
  802 vesa_unmap_buffer(vm_offset_t vaddr, size_t size)
  803 {
  804 #if VESA_DEBUG > 1
  805         printf("vesa_unmap_buffer: vaddr:%x size:%x\n", vaddr, size);
  806 #endif
  807         kmem_free(kernel_map, vaddr, size);
  808 }
  809 
  810 /* entry points */
  811 
  812 static int
  813 vesa_configure(int flags)
  814 {
  815         video_adapter_t *adp;
  816         int adapters;
  817         int error;
  818         int i;
  819 
  820         if (vesa_init_done)
  821                 return 0;
  822         if (flags & VIO_PROBE_ONLY)
  823                 return 0;               /* XXX */
  824 
  825         /*
  826          * If the VESA module has already been loaded, abort loading 
  827          * the module this time.
  828          */
  829         for (i = 0; (adp = vid_get_adapter(i)) != NULL; ++i) {
  830                 if (adp->va_flags & V_ADP_VESA)
  831                         return ENXIO;
  832                 if (adp->va_type == KD_VGA)
  833                         break;
  834         }
  835         /*
  836          * The VGA adapter is not found.  This is because either 
  837          * 1) the VGA driver has not been initialized, or 2) the VGA card
  838          * is not present.  If 1) is the case, we shall defer
  839          * initialization for now and try again later.
  840          */
  841         if (adp == NULL) {
  842                 vga_sub_configure = vesa_configure;
  843                 return ENODEV;
  844         }
  845 
  846         /* count number of registered adapters */
  847         for (++i; vid_get_adapter(i) != NULL; ++i)
  848                 ;
  849         adapters = i;
  850 
  851         /* call VESA BIOS */
  852         vesa_adp = adp;
  853         if (vesa_bios_init()) {
  854                 vesa_adp = NULL;
  855                 return ENXIO;
  856         }
  857         vesa_adp->va_flags |= V_ADP_VESA;
  858 
  859         /* remove conflicting modes if we have more than one adapter */
  860         if (adapters > 1) {
  861                 vesa_clear_modes(vesa_vmode,
  862                                  (vesa_adp->va_flags & V_ADP_COLOR) ? 
  863                                      V_INFO_COLOR : 0);
  864         }
  865 
  866         if ((error = vesa_load_ioctl()) == 0) {
  867                 prevvidsw = vidsw[vesa_adp->va_index];
  868                 vidsw[vesa_adp->va_index] = &vesavidsw;
  869                 vesa_init_done = TRUE;
  870         } else {
  871                 vesa_adp = NULL;
  872                 return error;
  873         }
  874 
  875         return 0;
  876 }
  877 
  878 #if 0
  879 static int
  880 vesa_nop(void)
  881 {
  882         return 0;
  883 }
  884 #endif
  885 
  886 static int
  887 vesa_error(void)
  888 {
  889         return 1;
  890 }
  891 
  892 static int
  893 vesa_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
  894 {
  895         return (*prevvidsw->probe)(unit, adpp, arg, flags);
  896 }
  897 
  898 static int
  899 vesa_init(int unit, video_adapter_t *adp, int flags)
  900 {
  901         return (*prevvidsw->init)(unit, adp, flags);
  902 }
  903 
  904 static int
  905 vesa_get_info(video_adapter_t *adp, int mode, video_info_t *info)
  906 {
  907         int i;
  908 
  909         if ((*prevvidsw->get_info)(adp, mode, info) == 0)
  910                 return 0;
  911 
  912         if (adp != vesa_adp)
  913                 return 1;
  914 
  915         mode = vesa_map_gen_mode_num(vesa_adp->va_type, 
  916                                      vesa_adp->va_flags & V_ADP_COLOR, mode);
  917         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
  918                 if (vesa_vmode[i].vi_mode == NA)
  919                         continue;
  920                 if (vesa_vmode[i].vi_mode == mode) {
  921                         *info = vesa_vmode[i];
  922                         return 0;
  923                 }
  924         }
  925         return 1;
  926 }
  927 
  928 static int
  929 vesa_query_mode(video_adapter_t *adp, video_info_t *info)
  930 {
  931         int i;
  932 
  933         if ((*prevvidsw->query_mode)(adp, info) == 0)
  934                 return 0;
  935         if (adp != vesa_adp)
  936                 return ENODEV;
  937 
  938         for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
  939                 if ((info->vi_width != 0)
  940                     && (info->vi_width != vesa_vmode[i].vi_width))
  941                         continue;
  942                 if ((info->vi_height != 0)
  943                     && (info->vi_height != vesa_vmode[i].vi_height))
  944                         continue;
  945                 if ((info->vi_cwidth != 0)
  946                     && (info->vi_cwidth != vesa_vmode[i].vi_cwidth))
  947                         continue;
  948                 if ((info->vi_cheight != 0)
  949                     && (info->vi_cheight != vesa_vmode[i].vi_cheight))
  950                         continue;
  951                 if ((info->vi_depth != 0)
  952                     && (info->vi_depth != vesa_vmode[i].vi_depth))
  953                         continue;
  954                 if ((info->vi_planes != 0)
  955                     && (info->vi_planes != vesa_vmode[i].vi_planes))
  956                         continue;
  957                 /* pixel format, memory model */
  958                 if ((info->vi_flags != 0)
  959                     && (info->vi_flags != vesa_vmode[i].vi_flags))
  960                         continue;
  961                 *info = vesa_vmode[i];
  962                 return 0;
  963         }
  964         return ENODEV;
  965 }
  966 
  967 static int
  968 vesa_set_mode(video_adapter_t *adp, int mode)
  969 {
  970         video_info_t info;
  971         int len;
  972 
  973         if (adp != vesa_adp)
  974                 return (*prevvidsw->set_mode)(adp, mode);
  975 
  976         mode = vesa_map_gen_mode_num(adp->va_type, 
  977                                      adp->va_flags & V_ADP_COLOR, mode);
  978 #if VESA_DEBUG > 0
  979         printf("VESA: set_mode(): %d(%x) -> %d(%x)\n",
  980                 adp->va_mode, adp->va_mode, mode, mode);
  981 #endif
  982         /* 
  983          * If the current mode is a VESA mode and the new mode is not,
  984          * restore the state of the adapter first by setting one of the
  985          * standard VGA mode, so that non-standard, extended SVGA registers 
  986          * are set to the state compatible with the standard VGA modes. 
  987          * Otherwise (*prevvidsw->set_mode)() may not be able to set up 
  988          * the new mode correctly.
  989          */
  990         if (VESA_MODE(adp->va_mode)) {
  991                 if ((*prevvidsw->get_info)(adp, mode, &info) == 0) {
  992                         int10_set_mode(adp->va_initial_bios_mode);
  993                         if (adp->va_info.vi_flags & V_INFO_LINEAR)
  994                                 vesa_unmap_buffer(adp->va_buffer,
  995                                                   vesa_adp_info->v_memsize*64*1024);
  996                         /* 
  997                          * Once (*prevvidsw->get_info)() succeeded, 
  998                          * (*prevvidsw->set_mode)() below won't fail...
  999                          */
 1000                 }
 1001         }
 1002 
 1003         /* we may not need to handle this mode after all... */
 1004         if ((*prevvidsw->set_mode)(adp, mode) == 0)
 1005                 return 0;
 1006 
 1007         /* is the new mode supported? */
 1008         if (vesa_get_info(adp, mode, &info))
 1009                 return 1;
 1010         /* assert(VESA_MODE(mode)); */
 1011 
 1012 #if VESA_DEBUG > 0
 1013         printf("VESA: about to set a VESA mode...\n");
 1014 #endif
 1015         /* don't use the linear frame buffer for text modes. XXX */
 1016         if (!(info.vi_flags & V_INFO_GRAPHICS))
 1017                 info.vi_flags &= ~V_INFO_LINEAR;
 1018 
 1019         if (vesa_bios_set_mode(mode | ((info.vi_flags & V_INFO_LINEAR) ? 0x4000 : 0)))
 1020                 return 1;
 1021 
 1022         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1023                 vesa_unmap_buffer(adp->va_buffer,
 1024                                   vesa_adp_info->v_memsize*64*1024);
 1025 
 1026 #if VESA_DEBUG > 0
 1027         printf("VESA: mode set!\n");
 1028 #endif
 1029         vesa_adp->va_mode = mode;
 1030         vesa_adp->va_flags &= ~V_ADP_COLOR;
 1031         vesa_adp->va_flags |= 
 1032                 (info.vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
 1033         vesa_adp->va_crtc_addr =
 1034                 (vesa_adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
 1035         if (info.vi_flags & V_INFO_LINEAR) {
 1036 #if VESA_DEBUG > 1
 1037                 printf("VESA: setting up LFB\n");
 1038 #endif
 1039                 vesa_adp->va_buffer =
 1040                         vesa_map_buffer(info.vi_buffer,
 1041                                         vesa_adp_info->v_memsize*64*1024);
 1042                 vesa_adp->va_buffer_size = info.vi_buffer_size;
 1043                 vesa_adp->va_window = vesa_adp->va_buffer;
 1044                 vesa_adp->va_window_size = info.vi_buffer_size/info.vi_planes;
 1045                 vesa_adp->va_window_gran = info.vi_buffer_size/info.vi_planes;
 1046         } else {
 1047                 vesa_adp->va_buffer = 0;
 1048                 vesa_adp->va_buffer_size = info.vi_buffer_size;
 1049                 vesa_adp->va_window = BIOS_PADDRTOVADDR(info.vi_window);
 1050                 vesa_adp->va_window_size = info.vi_window_size;
 1051                 vesa_adp->va_window_gran = info.vi_window_gran;
 1052         }
 1053         vesa_adp->va_window_orig = 0;
 1054         len = vesa_bios_get_line_length();
 1055         if (len > 0) {
 1056                 vesa_adp->va_line_width = len;
 1057         } else if (info.vi_flags & V_INFO_GRAPHICS) {
 1058                 switch (info.vi_depth/info.vi_planes) {
 1059                 case 1:
 1060                         vesa_adp->va_line_width = info.vi_width/8;
 1061                         break;
 1062                 case 2:
 1063                         vesa_adp->va_line_width = info.vi_width/4;
 1064                         break;
 1065                 case 4:
 1066                         vesa_adp->va_line_width = info.vi_width/2;
 1067                         break;
 1068                 case 8:
 1069                 default: /* shouldn't happen */
 1070                         vesa_adp->va_line_width = info.vi_width;
 1071                         break;
 1072                 }
 1073         } else {
 1074                 vesa_adp->va_line_width = info.vi_width;
 1075         }
 1076         vesa_adp->va_disp_start.x = 0;
 1077         vesa_adp->va_disp_start.y = 0;
 1078 #if VESA_DEBUG > 0
 1079         printf("vesa_set_mode(): vi_width:%d, len:%d, line_width:%d\n",
 1080                info.vi_width, len, vesa_adp->va_line_width);
 1081 #endif
 1082         bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
 1083 
 1084         /* move hardware cursor out of the way */
 1085         (*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
 1086 
 1087         return 0;
 1088 }
 1089 
 1090 static int
 1091 vesa_save_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1092                int ch, int count)
 1093 {
 1094         return (*prevvidsw->save_font)(adp, page, fontsize, data, ch, count);
 1095 }
 1096 
 1097 static int
 1098 vesa_load_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1099                int ch, int count)
 1100 {
 1101         return (*prevvidsw->load_font)(adp, page, fontsize, data, ch, count);
 1102 }
 1103 
 1104 static int
 1105 vesa_show_font(video_adapter_t *adp, int page)
 1106 {
 1107         return (*prevvidsw->show_font)(adp, page);
 1108 }
 1109 
 1110 static int
 1111 vesa_save_palette(video_adapter_t *adp, u_char *palette)
 1112 {
 1113         int bits;
 1114         int error;
 1115 
 1116         if ((adp == vesa_adp) && (vesa_adp_info->v_flags & V_DAC8)
 1117             && VESA_MODE(adp->va_mode)) {
 1118                 bits = vesa_bios_get_dac();
 1119                 error = vesa_bios_save_palette(0, 256, palette, bits);
 1120                 if (error == 0)
 1121                         return 0;
 1122                 if (bits != 6)
 1123                         return error;
 1124         }
 1125 
 1126         return (*prevvidsw->save_palette)(adp, palette);
 1127 }
 1128 
 1129 static int
 1130 vesa_load_palette(video_adapter_t *adp, u_char *palette)
 1131 {
 1132 #if notyet
 1133         int bits;
 1134         int error;
 1135 
 1136         if ((adp == vesa_adp) && (vesa_adp_info->v_flags & V_DAC8) 
 1137             && VESA_MODE(adp->va_mode) && ((bits = vesa_bios_set_dac(8)) > 6)) {
 1138                 error = vesa_bios_load_palette(0, 256, palette, bits);
 1139                 if (error == 0)
 1140                         return 0;
 1141                 if (vesa_bios_set_dac(6) != 6)
 1142                         return 1;
 1143         }
 1144 #endif /* notyet */
 1145 
 1146         return (*prevvidsw->load_palette)(adp, palette);
 1147 }
 1148 
 1149 static int
 1150 vesa_set_border(video_adapter_t *adp, int color)
 1151 {
 1152         return (*prevvidsw->set_border)(adp, color);
 1153 }
 1154 
 1155 static int
 1156 vesa_save_state(video_adapter_t *adp, void *p, size_t size)
 1157 {
 1158         if (adp != vesa_adp)
 1159                 return (*prevvidsw->save_state)(adp, p, size);
 1160 
 1161         if (vesa_state_buf_size == 0)
 1162                 vesa_state_buf_size = vesa_bios_state_buf_size();
 1163         if (size == 0)
 1164                 return (sizeof(int) + vesa_state_buf_size);
 1165         else if (size < (sizeof(int) + vesa_state_buf_size))
 1166                 return 1;
 1167 
 1168         ((adp_state_t *)p)->sig = V_STATE_SIG;
 1169         bzero(((adp_state_t *)p)->regs, vesa_state_buf_size);
 1170         return vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs, 
 1171                                       vesa_state_buf_size);
 1172 }
 1173 
 1174 static int
 1175 vesa_load_state(video_adapter_t *adp, void *p)
 1176 {
 1177         if ((adp != vesa_adp) || (((adp_state_t *)p)->sig != V_STATE_SIG))
 1178                 return (*prevvidsw->load_state)(adp, p);
 1179 
 1180         return vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs, 
 1181                                       vesa_state_buf_size);
 1182 }
 1183 
 1184 #if 0
 1185 static int
 1186 vesa_get_origin(video_adapter_t *adp, off_t *offset)
 1187 {
 1188         struct vm86frame vmf;
 1189         int err;
 1190 
 1191         bzero(&vmf, sizeof(vmf));
 1192         vmf.vmf_eax = 0x4f05; 
 1193         vmf.vmf_ebx = 0x10;             /* WINDOW_A, XXX */
 1194         err = vm86_intcall(0x10, &vmf); 
 1195         if ((err != 0) || (vmf.vmf_ax != 0x4f))
 1196                 return 1;
 1197         *offset = vmf.vmf_dx*adp->va_window_gran;
 1198         return 0;
 1199 }
 1200 #endif
 1201 
 1202 static int
 1203 vesa_set_origin(video_adapter_t *adp, off_t offset)
 1204 {
 1205         struct vm86frame vmf;
 1206         int err;
 1207 
 1208         /*
 1209          * This function should return as quickly as possible to 
 1210          * maintain good performance of the system. For this reason,
 1211          * error checking is kept minimal and let the VESA BIOS to 
 1212          * detect error.
 1213          */
 1214         if (adp != vesa_adp) 
 1215                 return (*prevvidsw->set_win_org)(adp, offset);
 1216 
 1217         /* if this is a linear frame buffer, do nothing */
 1218         if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1219                 return 0;
 1220         /* XXX */
 1221         if (adp->va_window_gran == 0)
 1222                 return 1;
 1223 
 1224         bzero(&vmf, sizeof(vmf));
 1225         vmf.vmf_eax = 0x4f05; 
 1226         vmf.vmf_ebx = 0;                /* WINDOW_A, XXX */
 1227         vmf.vmf_edx = offset/adp->va_window_gran;
 1228         err = vm86_intcall(0x10, &vmf); 
 1229         if ((err != 0) || (vmf.vmf_ax != 0x4f))
 1230                 return 1;
 1231         bzero(&vmf, sizeof(vmf));
 1232         vmf.vmf_eax = 0x4f05; 
 1233         vmf.vmf_ebx = 1;                /* WINDOW_B, XXX */
 1234         vmf.vmf_edx = offset/adp->va_window_gran;
 1235         err = vm86_intcall(0x10, &vmf); 
 1236         adp->va_window_orig = (offset/adp->va_window_gran)*adp->va_window_gran;
 1237         return 0;                       /* XXX */
 1238 }
 1239 
 1240 static int
 1241 vesa_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
 1242 {
 1243         return (*prevvidsw->read_hw_cursor)(adp, col, row);
 1244 }
 1245 
 1246 static int
 1247 vesa_set_hw_cursor(video_adapter_t *adp, int col, int row)
 1248 {
 1249         return (*prevvidsw->set_hw_cursor)(adp, col, row);
 1250 }
 1251 
 1252 static int
 1253 vesa_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
 1254                          int celsize, int blink)
 1255 {
 1256         return (*prevvidsw->set_hw_cursor_shape)(adp, base, height, celsize,
 1257                                                  blink);
 1258 }
 1259 
 1260 static int
 1261 vesa_blank_display(video_adapter_t *adp, int mode) 
 1262 {
 1263         /* XXX: use VESA DPMS */
 1264         return (*prevvidsw->blank_display)(adp, mode);
 1265 }
 1266 
 1267 static int
 1268 vesa_mmap(video_adapter_t *adp, vm_offset_t offset, int prot)
 1269 {
 1270 #if VESA_DEBUG > 0
 1271         printf("vesa_mmap(): window:0x%x, buffer:0x%x, offset:0x%x\n", 
 1272                adp->va_info.vi_window, adp->va_info.vi_buffer, offset);
 1273 #endif
 1274 
 1275         if ((adp == vesa_adp) && (adp->va_info.vi_flags & V_INFO_LINEAR)) {
 1276                 /* va_window_size == va_buffer_size/vi_planes */
 1277                 /* XXX: is this correct? */
 1278                 if (offset > adp->va_window_size - PAGE_SIZE)
 1279                         return -1;
 1280 #ifdef __i386__
 1281                 return i386_btop(adp->va_info.vi_buffer + offset);
 1282 #endif
 1283 #ifdef __alpha__ /* XXX */
 1284                 return alpha_btop(adp->va_info.vi_buffer + offset);
 1285 #endif
 1286         } else {
 1287                 return (*prevvidsw->mmap)(adp, offset, prot);
 1288         }
 1289 }
 1290 
 1291 static int
 1292 vesa_clear(video_adapter_t *adp)
 1293 {
 1294         return (*prevvidsw->clear)(adp);
 1295 }
 1296 
 1297 static int
 1298 vesa_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 1299 {
 1300         return (*prevvidsw->fill_rect)(adp, val, x, y, cx, cy);
 1301 }
 1302 
 1303 static int
 1304 vesa_bitblt(video_adapter_t *adp,...)
 1305 {
 1306         /* FIXME */
 1307         return 1;
 1308 }
 1309 
 1310 static int
 1311 get_palette(video_adapter_t *adp, int base, int count,
 1312             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1313 {
 1314         u_char *r;
 1315         u_char *g;
 1316         u_char *b;
 1317         int bits;
 1318         int error;
 1319 
 1320         if ((base < 0) || (base >= 256) || (count < 0) || (count > 256))
 1321                 return 1;
 1322         if (base + count > 256)
 1323                 return 1;
 1324         if (!(vesa_adp_info->v_flags & V_DAC8) || !VESA_MODE(adp->va_mode))
 1325                 return 1;
 1326 
 1327         bits = vesa_bios_get_dac();
 1328         if (bits <= 6)
 1329                 return 1;
 1330 
 1331         r = malloc(count*3, M_DEVBUF, M_WAITOK);
 1332         g = r + count;
 1333         b = g + count;
 1334         error = vesa_bios_save_palette2(base, count, r, g, b, bits);
 1335         if (error == 0) {
 1336                 copyout(r, red, count);
 1337                 copyout(g, green, count);
 1338                 copyout(b, blue, count);
 1339                 if (trans != NULL) {
 1340                         bzero(r, count);
 1341                         copyout(r, trans, count);
 1342                 }
 1343         }
 1344         free(r, M_DEVBUF);
 1345 
 1346         /* if error && bits != 6 at this point, we are in in trouble... XXX */
 1347         return error;
 1348 }
 1349 
 1350 static int
 1351 set_palette(video_adapter_t *adp, int base, int count,
 1352             u_char *red, u_char *green, u_char *blue, u_char *trans)
 1353 {
 1354         return 1;
 1355 #if notyet
 1356         u_char *r;
 1357         u_char *g;
 1358         u_char *b;
 1359         int bits;
 1360         int error;
 1361 
 1362         if ((base < 0) || (base >= 256) || (base + count > 256))
 1363                 return 1;
 1364         if (!(vesa_adp_info->v_flags & V_DAC8) || !VESA_MODE(adp->va_mode)
 1365                 || ((bits = vesa_bios_set_dac(8)) <= 6))
 1366                 return 1;
 1367 
 1368         r = malloc(count*3, M_DEVBUF, M_WAITOK);
 1369         g = r + count;
 1370         b = g + count;
 1371         copyin(red, r, count);
 1372         copyin(green, g, count);
 1373         copyin(blue, b, count);
 1374 
 1375         error = vesa_bios_load_palette2(base, count, r, g, b, bits);
 1376         free(r, M_DEVBUF);
 1377         if (error == 0)
 1378                 return 0;
 1379 
 1380         /* if the following call fails, we are in trouble... XXX */
 1381         vesa_bios_set_dac(6);
 1382         return 1;
 1383 #endif /* notyet */
 1384 }
 1385 
 1386 static int
 1387 vesa_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 1388 {
 1389         int bytes;
 1390 
 1391         if (adp != vesa_adp)
 1392                 return (*prevvidsw->ioctl)(adp, cmd, arg);
 1393 
 1394         switch (cmd) {
 1395         case FBIO_SETWINORG:    /* set frame buffer window origin */
 1396                 if (!VESA_MODE(adp->va_mode))
 1397                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1398                 return (vesa_set_origin(adp, *(off_t *)arg) ? ENODEV : 0);
 1399 
 1400         case FBIO_SETDISPSTART: /* set display start address */
 1401                 if (!VESA_MODE(adp->va_mode))
 1402                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1403                 if (vesa_bios_set_start(((video_display_start_t *)arg)->x,
 1404                                         ((video_display_start_t *)arg)->y))
 1405                         return ENODEV;
 1406                 adp->va_disp_start.x = ((video_display_start_t *)arg)->x;
 1407                 adp->va_disp_start.y = ((video_display_start_t *)arg)->y;
 1408                 return 0;
 1409 
 1410         case FBIO_SETLINEWIDTH: /* set line length in pixel */
 1411                 if (!VESA_MODE(adp->va_mode))
 1412                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1413                 if (vesa_bios_set_line_length(*(u_int *)arg, &bytes, NULL))
 1414                         return ENODEV;
 1415                 adp->va_line_width = bytes;
 1416 #if VESA_DEBUG > 1
 1417                 printf("new line width:%d\n", adp->va_line_width);
 1418 #endif
 1419                 return 0;
 1420 
 1421         case FBIO_GETPALETTE:   /* get color palette */
 1422                 if (get_palette(adp, ((video_color_palette_t *)arg)->index,
 1423                                 ((video_color_palette_t *)arg)->count,
 1424                                 ((video_color_palette_t *)arg)->red,
 1425                                 ((video_color_palette_t *)arg)->green,
 1426                                 ((video_color_palette_t *)arg)->blue,
 1427                                 ((video_color_palette_t *)arg)->transparent))
 1428                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1429                 return 0;
 1430 
 1431 
 1432         case FBIO_SETPALETTE:   /* set color palette */
 1433                 if (set_palette(adp, ((video_color_palette_t *)arg)->index,
 1434                                 ((video_color_palette_t *)arg)->count,
 1435                                 ((video_color_palette_t *)arg)->red,
 1436                                 ((video_color_palette_t *)arg)->green,
 1437                                 ((video_color_palette_t *)arg)->blue,
 1438                                 ((video_color_palette_t *)arg)->transparent))
 1439                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1440                 return 0;
 1441 
 1442         case FBIOGETCMAP:       /* get color palette */
 1443                 if (get_palette(adp, ((struct fbcmap *)arg)->index,
 1444                                 ((struct fbcmap *)arg)->count,
 1445                                 ((struct fbcmap *)arg)->red,
 1446                                 ((struct fbcmap *)arg)->green,
 1447                                 ((struct fbcmap *)arg)->blue, NULL))
 1448                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1449                 return 0;
 1450 
 1451         case FBIOPUTCMAP:       /* set color palette */
 1452                 if (set_palette(adp, ((struct fbcmap *)arg)->index,
 1453                                 ((struct fbcmap *)arg)->count,
 1454                                 ((struct fbcmap *)arg)->red,
 1455                                 ((struct fbcmap *)arg)->green,
 1456                                 ((struct fbcmap *)arg)->blue, NULL))
 1457                         return (*prevvidsw->ioctl)(adp, cmd, arg);
 1458                 return 0;
 1459 
 1460         default:
 1461                 return (*prevvidsw->ioctl)(adp, cmd, arg);
 1462         }
 1463 }
 1464 
 1465 static int
 1466 vesa_diag(video_adapter_t *adp, int level)
 1467 {
 1468         int error;
 1469 
 1470         /* call the previous handler first */
 1471         error = (*prevvidsw->diag)(adp, level);
 1472         if (error)
 1473                 return error;
 1474 
 1475         if (adp != vesa_adp)
 1476                 return 1;
 1477 
 1478         if (level <= 0)
 1479                 return 0;
 1480 
 1481         return 0;
 1482 }
 1483 
 1484 static int
 1485 vesa_bios_info(int level)
 1486 {
 1487 #if VESA_DEBUG > 1
 1488         struct vesa_mode vmode;
 1489         int i;
 1490 #endif
 1491 
 1492         /* general adapter information */
 1493         printf("VESA: v%d.%d, %dk memory, flags:0x%x, mode table:%p (%x)\n", 
 1494                ((vesa_adp_info->v_version & 0xf000) >> 12) * 10 
 1495                    + ((vesa_adp_info->v_version & 0x0f00) >> 8),
 1496                ((vesa_adp_info->v_version & 0x00f0) >> 4) * 10 
 1497                    + (vesa_adp_info->v_version & 0x000f),
 1498                vesa_adp_info->v_memsize * 64, vesa_adp_info->v_flags,
 1499                vesa_vmodetab, vesa_adp_info->v_modetable);
 1500         /* OEM string */
 1501         if (vesa_oemstr != NULL)
 1502                 printf("VESA: %s\n", vesa_oemstr);
 1503 
 1504         if (level <= 0)
 1505                 return 0;
 1506 
 1507         if (vesa_adp_info->v_version >= 0x0200) {
 1508                 /* vender name, product name, product revision */
 1509                 printf("VESA: %s %s %s\n",
 1510                         (vesa_venderstr != NULL) ? vesa_venderstr : "unknown",
 1511                         (vesa_prodstr != NULL) ? vesa_prodstr : "unknown",
 1512                         (vesa_revstr != NULL) ? vesa_revstr : "?");
 1513         }
 1514 
 1515 #if VESA_DEBUG > 1
 1516         /* mode information */
 1517         for (i = 0;
 1518                 (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
 1519                 && (vesa_vmodetab[i] != 0xffff); ++i) {
 1520                 if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode))
 1521                         continue;
 1522 
 1523                 /* print something for diagnostic purpose */
 1524                 printf("VESA: mode:0x%03x, flags:0x%04x", 
 1525                        vesa_vmodetab[i], vmode.v_modeattr);
 1526                 if (vmode.v_modeattr & V_MODEOPTINFO) {
 1527                         if (vmode.v_modeattr & V_MODEGRAPHICS) {
 1528                                 printf(", G %dx%dx%d %d, ", 
 1529                                        vmode.v_width, vmode.v_height,
 1530                                        vmode.v_bpp, vmode.v_planes);
 1531                         } else {
 1532                                 printf(", T %dx%d, ", 
 1533                                        vmode.v_width, vmode.v_height);
 1534                         }
 1535                         printf("font:%dx%d, ", 
 1536                                vmode.v_cwidth, vmode.v_cheight);
 1537                         printf("pages:%d, mem:%d",
 1538                                vmode.v_ipages + 1, vmode.v_memmodel);
 1539                 }
 1540                 if (vmode.v_modeattr & V_MODELFB) {
 1541                         printf("\nVESA: LFB:0x%x, off:0x%x, off_size:0x%x", 
 1542                                vmode.v_lfb, vmode.v_offscreen,
 1543                                vmode.v_offscreensize*1024);
 1544                 }
 1545                 printf("\n");
 1546                 printf("VESA: window A:0x%x (%x), window B:0x%x (%x), ",
 1547                        vmode.v_waseg, vmode.v_waattr,
 1548                        vmode.v_wbseg, vmode.v_wbattr);
 1549                 printf("size:%dk, gran:%dk\n",
 1550                        vmode.v_wsize, vmode.v_wgran);
 1551         }
 1552 #endif /* VESA_DEBUG > 1 */
 1553 
 1554         return 0;
 1555 }
 1556 
 1557 /* module loading */
 1558 
 1559 static int
 1560 vesa_load(void)
 1561 {
 1562         int error;
 1563         int s;
 1564 
 1565         if (vesa_init_done)
 1566                 return 0;
 1567 
 1568         /* locate a VGA adapter */
 1569         s = spltty();
 1570         vesa_adp = NULL;
 1571         error = vesa_configure(0);
 1572         splx(s);
 1573 
 1574         if (error == 0)
 1575                 vesa_bios_info(bootverbose);
 1576 
 1577         return error;
 1578 }
 1579 
 1580 static int
 1581 vesa_unload(void)
 1582 {
 1583         u_char palette[256*3];
 1584         int error;
 1585         int bits;
 1586         int s;
 1587 
 1588         /* if the adapter is currently in a VESA mode, don't unload */
 1589         if ((vesa_adp != NULL) && VESA_MODE(vesa_adp->va_mode))
 1590                 return EBUSY;
 1591         /* 
 1592          * FIXME: if there is at least one vty which is in a VESA mode,
 1593          * we shouldn't be unloading! XXX
 1594          */
 1595 
 1596         s = spltty();
 1597         if ((error = vesa_unload_ioctl()) == 0) {
 1598                 if (vesa_adp != NULL) {
 1599                         if (vesa_adp_info->v_flags & V_DAC8)  {
 1600                                 bits = vesa_bios_get_dac();
 1601                                 if (bits > 6) {
 1602                                         vesa_bios_save_palette(0, 256,
 1603                                                                palette, bits);
 1604                                         vesa_bios_set_dac(6);
 1605                                         vesa_bios_load_palette(0, 256,
 1606                                                                palette, 6);
 1607                                 }
 1608                         }
 1609                         vesa_adp->va_flags &= ~V_ADP_VESA;
 1610                         vidsw[vesa_adp->va_index] = prevvidsw;
 1611                 }
 1612         }
 1613         splx(s);
 1614 
 1615         return error;
 1616 }
 1617 
 1618 static int
 1619 vesa_mod_event(module_t mod, int type, void *data)
 1620 {
 1621         switch (type) {
 1622         case MOD_LOAD:
 1623                 return vesa_load();
 1624         case MOD_UNLOAD:
 1625                 return vesa_unload();
 1626         default:
 1627                 break;
 1628         }
 1629         return 0;
 1630 }
 1631 
 1632 static moduledata_t vesa_mod = {
 1633         "vesa",
 1634         vesa_mod_event,
 1635         NULL,
 1636 };
 1637 
 1638 DECLARE_MODULE(vesa, vesa_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
 1639 
 1640 #endif  /* VGA_NO_MODE_CHANGE */

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