hw/vga.c

   1 /*
   2  * QEMU VGA Emulator.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "console.h"
  26 #include "pc.h"
  27 #include "pci.h"
  28 #include "vga_int.h"
  29 #include "pixel_ops.h"
  30 #include "qemu-timer.h"
  31 #include "kvm.h"
  32
  33 //#define DEBUG_VGA
  34 //#define DEBUG_VGA_MEM
  35 //#define DEBUG_VGA_REG
  36
  37 //#define DEBUG_BOCHS_VBE
  38
  39 /* force some bits to zero */
  40 const uint8_t sr_mask[8] = {
  41     0x03,
  42     0x3d,
  43     0x0f,
  44     0x3f,
  45     0x0e,
  46     0x00,
  47     0x00,
  48     0xff,
  49 };
  50
  51 const uint8_t gr_mask[16] = {
  52     0x0f, /* 0x00 */
  53     0x0f, /* 0x01 */
  54     0x0f, /* 0x02 */
  55     0x1f, /* 0x03 */
  56     0x03, /* 0x04 */
  57     0x7b, /* 0x05 */
  58     0x0f, /* 0x06 */
  59     0x0f, /* 0x07 */
  60     0xff, /* 0x08 */
  61     0x00, /* 0x09 */
  62     0x00, /* 0x0a */
  63     0x00, /* 0x0b */
  64     0x00, /* 0x0c */
  65     0x00, /* 0x0d */
  66     0x00, /* 0x0e */
  67     0x00, /* 0x0f */
  68 };
  69
  70 #define cbswap_32(__x) \
  71 ((uint32_t)( \
  72                 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
  73                 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) <<  8) | \
  74                 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >>  8) | \
  75                 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
  76
  77 #ifdef HOST_WORDS_BIGENDIAN
  78 #define PAT(x) cbswap_32(x)
  79 #else
  80 #define PAT(x) (x)
  81 #endif
  82
  83 #ifdef HOST_WORDS_BIGENDIAN
  84 #define BIG 1
  85 #else
  86 #define BIG 0
  87 #endif
  88
  89 #ifdef HOST_WORDS_BIGENDIAN
  90 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
  91 #else
  92 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
  93 #endif
  94
  95 static const uint32_t mask16[16] = {
  96     PAT(0x00000000),
  97     PAT(0x000000ff),
  98     PAT(0x0000ff00),
  99     PAT(0x0000ffff),
 100     PAT(0x00ff0000),
 101     PAT(0x00ff00ff),
 102     PAT(0x00ffff00),
 103     PAT(0x00ffffff),
 104     PAT(0xff000000),
 105     PAT(0xff0000ff),
 106     PAT(0xff00ff00),
 107     PAT(0xff00ffff),
 108     PAT(0xffff0000),
 109     PAT(0xffff00ff),
 110     PAT(0xffffff00),
 111     PAT(0xffffffff),
 112 };
 113
 114 #undef PAT
 115
 116 #ifdef HOST_WORDS_BIGENDIAN
 117 #define PAT(x) (x)
 118 #else
 119 #define PAT(x) cbswap_32(x)
 120 #endif
 121
 122 static const uint32_t dmask16[16] = {
 123     PAT(0x00000000),
 124     PAT(0x000000ff),
 125     PAT(0x0000ff00),
 126     PAT(0x0000ffff),
 127     PAT(0x00ff0000),
 128     PAT(0x00ff00ff),
 129     PAT(0x00ffff00),
 130     PAT(0x00ffffff),
 131     PAT(0xff000000),
 132     PAT(0xff0000ff),
 133     PAT(0xff00ff00),
 134     PAT(0xff00ffff),
 135     PAT(0xffff0000),
 136     PAT(0xffff00ff),
 137     PAT(0xffffff00),
 138     PAT(0xffffffff),
 139 };
 140
 141 static const uint32_t dmask4[4] = {
 142     PAT(0x00000000),
 143     PAT(0x0000ffff),
 144     PAT(0xffff0000),
 145     PAT(0xffffffff),
 146 };
 147
 148 static uint32_t expand4[256];
 149 static uint16_t expand2[256];
 150 static uint8_t expand4to8[16];
 151
 152 static void vga_screen_dump(void *opaque, const char *filename);
 153 static char *screen_dump_filename;
 154 static DisplayChangeListener *screen_dump_dcl;
 155
 156 static void vga_dumb_update_retrace_info(VGACommonState *s)
 157 {
 158     (void) s;
 159 }
 160
 161 static void vga_precise_update_retrace_info(VGACommonState *s)
 162 {
 163     int htotal_chars;
 164     int hretr_start_char;
 165     int hretr_skew_chars;
 166     int hretr_end_char;
 167
 168     int vtotal_lines;
 169     int vretr_start_line;
 170     int vretr_end_line;
 171
 172     int div2, sldiv2, dots;
 173     int clocking_mode;
 174     int clock_sel;
 175     const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
 176     int64_t chars_per_sec;
 177     struct vga_precise_retrace *r = &s->retrace_info.precise;
 178
 179     htotal_chars = s->cr[0x00] + 5;
 180     hretr_start_char = s->cr[0x04];
 181     hretr_skew_chars = (s->cr[0x05] >> 5) & 3;
 182     hretr_end_char = s->cr[0x05] & 0x1f;
 183
 184     vtotal_lines = (s->cr[0x06]
 185                     | (((s->cr[0x07] & 1) | ((s->cr[0x07] >> 4) & 2)) << 8)) + 2
 186         ;
 187     vretr_start_line = s->cr[0x10]
 188         | ((((s->cr[0x07] >> 2) & 1) | ((s->cr[0x07] >> 6) & 2)) << 8)
 189         ;
 190     vretr_end_line = s->cr[0x11] & 0xf;
 191
 192
 193     div2 = (s->cr[0x17] >> 2) & 1;
 194     sldiv2 = (s->cr[0x17] >> 3) & 1;
 195
 196     clocking_mode = (s->sr[0x01] >> 3) & 1;
 197     clock_sel = (s->msr >> 2) & 3;
 198     dots = (s->msr & 1) ? 8 : 9;
 199
 200     chars_per_sec = clk_hz[clock_sel] / dots;
 201
 202     htotal_chars <<= clocking_mode;
 203
 204     r->total_chars = vtotal_lines * htotal_chars;
 205     if (r->freq) {
 206         r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq);
 207     } else {
 208         r->ticks_per_char = get_ticks_per_sec() / chars_per_sec;
 209     }
 210
 211     r->vstart = vretr_start_line;
 212     r->vend = r->vstart + vretr_end_line + 1;
 213
 214     r->hstart = hretr_start_char + hretr_skew_chars;
 215     r->hend = r->hstart + hretr_end_char + 1;
 216     r->htotal = htotal_chars;
 217
 218 #if 0
 219     printf (
 220         "hz=%f\n"
 221         "htotal = %d\n"
 222         "hretr_start = %d\n"
 223         "hretr_skew = %d\n"
 224         "hretr_end = %d\n"
 225         "vtotal = %d\n"
 226         "vretr_start = %d\n"
 227         "vretr_end = %d\n"
 228         "div2 = %d sldiv2 = %d\n"
 229         "clocking_mode = %d\n"
 230         "clock_sel = %d %d\n"
 231         "dots = %d\n"
 232         "ticks/char = %lld\n"
 233         "\n",
 234         (double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars),
 235         htotal_chars,
 236         hretr_start_char,
 237         hretr_skew_chars,
 238         hretr_end_char,
 239         vtotal_lines,
 240         vretr_start_line,
 241         vretr_end_line,
 242         div2, sldiv2,
 243         clocking_mode,
 244         clock_sel,
 245         clk_hz[clock_sel],
 246         dots,
 247         r->ticks_per_char
 248         );
 249 #endif
 250 }
 251
 252 static uint8_t vga_precise_retrace(VGACommonState *s)
 253 {
 254     struct vga_precise_retrace *r = &s->retrace_info.precise;
 255     uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
 256
 257     if (r->total_chars) {
 258         int cur_line, cur_line_char, cur_char;
 259         int64_t cur_tick;
 260
 261         cur_tick = qemu_get_clock(vm_clock);
 262
 263         cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
 264         cur_line = cur_char / r->htotal;
 265
 266         if (cur_line >= r->vstart && cur_line <= r->vend) {
 267             val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
 268         } else {
 269             cur_line_char = cur_char % r->htotal;
 270             if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
 271                 val |= ST01_DISP_ENABLE;
 272             }
 273         }
 274
 275         return val;
 276     } else {
 277         return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
 278     }
 279 }
 280
 281 static uint8_t vga_dumb_retrace(VGACommonState *s)
 282 {
 283     return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
 284 }
 285
 286 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
 287 {
 288     if (s->msr & MSR_COLOR_EMULATION) {
 289         /* Color */
 290         return (addr >= 0x3b0 && addr <= 0x3bf);
 291     } else {
 292         /* Monochrome */
 293         return (addr >= 0x3d0 && addr <= 0x3df);
 294     }
 295 }
 296
 297 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
 298 {
 299     VGACommonState *s = opaque;
 300     int val, index;
 301
 302     if (vga_ioport_invalid(s, addr)) {
 303         val = 0xff;
 304     } else {
 305         switch(addr) {
 306         case 0x3c0:
 307             if (s->ar_flip_flop == 0) {
 308                 val = s->ar_index;
 309             } else {
 310                 val = 0;
 311             }
 312             break;
 313         case 0x3c1:
 314             index = s->ar_index & 0x1f;
 315             if (index < 21)
 316                 val = s->ar[index];
 317             else
 318                 val = 0;
 319             break;
 320         case 0x3c2:
 321             val = s->st00;
 322             break;
 323         case 0x3c4:
 324             val = s->sr_index;
 325             break;
 326         case 0x3c5:
 327             val = s->sr[s->sr_index];
 328 #ifdef DEBUG_VGA_REG
 329             printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
 330 #endif
 331             break;
 332         case 0x3c7:
 333             val = s->dac_state;
 334             break;
 335         case 0x3c8:
 336             val = s->dac_write_index;
 337             break;
 338         case 0x3c9:
 339             val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
 340             if (++s->dac_sub_index == 3) {
 341                 s->dac_sub_index = 0;
 342                 s->dac_read_index++;
 343             }
 344             break;
 345         case 0x3ca:
 346             val = s->fcr;
 347             break;
 348         case 0x3cc:
 349             val = s->msr;
 350             break;
 351         case 0x3ce:
 352             val = s->gr_index;
 353             break;
 354         case 0x3cf:
 355             val = s->gr[s->gr_index];
 356 #ifdef DEBUG_VGA_REG
 357             printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
 358 #endif
 359             break;
 360         case 0x3b4:
 361         case 0x3d4:
 362             val = s->cr_index;
 363             break;
 364         case 0x3b5:
 365         case 0x3d5:
 366             val = s->cr[s->cr_index];
 367 #ifdef DEBUG_VGA_REG
 368             printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
 369 #endif
 370             break;
 371         case 0x3ba:
 372         case 0x3da:
 373             /* just toggle to fool polling */
 374             val = s->st01 = s->retrace(s);
 375             s->ar_flip_flop = 0;
 376             break;
 377         default:
 378             val = 0x00;
 379             break;
 380         }
 381     }
 382 #if defined(DEBUG_VGA)
 383     printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
 384 #endif
 385     return val;
 386 }
 387
 388 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 389 {
 390     VGACommonState *s = opaque;
 391     int index;
 392
 393     /* check port range access depending on color/monochrome mode */
 394     if (vga_ioport_invalid(s, addr)) {
 395         return;
 396     }
 397 #ifdef DEBUG_VGA
 398     printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
 399 #endif
 400
 401     switch(addr) {
 402     case 0x3c0:
 403         if (s->ar_flip_flop == 0) {
 404             val &= 0x3f;
 405             s->ar_index = val;
 406         } else {
 407             index = s->ar_index & 0x1f;
 408             switch(index) {
 409             case 0x00 ... 0x0f:
 410                 s->ar[index] = val & 0x3f;
 411                 break;
 412             case 0x10:
 413                 s->ar[index] = val & ~0x10;
 414                 break;
 415             case 0x11:
 416                 s->ar[index] = val;
 417                 break;
 418             case 0x12:
 419                 s->ar[index] = val & ~0xc0;
 420                 break;
 421             case 0x13:
 422                 s->ar[index] = val & ~0xf0;
 423                 break;
 424             case 0x14:
 425                 s->ar[index] = val & ~0xf0;
 426                 break;
 427             default:
 428                 break;
 429             }
 430         }
 431         s->ar_flip_flop ^= 1;
 432         break;
 433     case 0x3c2:
 434         s->msr = val & ~0x10;
 435         s->update_retrace_info(s);
 436         break;
 437     case 0x3c4:
 438         s->sr_index = val & 7;
 439         break;
 440     case 0x3c5:
 441 #ifdef DEBUG_VGA_REG
 442         printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
 443 #endif
 444         s->sr[s->sr_index] = val & sr_mask[s->sr_index];
 445         if (s->sr_index == 1) s->update_retrace_info(s);
 446         break;
 447     case 0x3c7:
 448         s->dac_read_index = val;
 449         s->dac_sub_index = 0;
 450         s->dac_state = 3;
 451         break;
 452     case 0x3c8:
 453         s->dac_write_index = val;
 454         s->dac_sub_index = 0;
 455         s->dac_state = 0;
 456         break;
 457     case 0x3c9:
 458         s->dac_cache[s->dac_sub_index] = val;
 459         if (++s->dac_sub_index == 3) {
 460             memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
 461             s->dac_sub_index = 0;
 462             s->dac_write_index++;
 463         }
 464         break;
 465     case 0x3ce:
 466         s->gr_index = val & 0x0f;
 467         break;
 468     case 0x3cf:
 469 #ifdef DEBUG_VGA_REG
 470         printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
 471 #endif
 472         s->gr[s->gr_index] = val & gr_mask[s->gr_index];
 473         break;
 474     case 0x3b4:
 475     case 0x3d4:
 476         s->cr_index = val;
 477         break;
 478     case 0x3b5:
 479     case 0x3d5:
 480 #ifdef DEBUG_VGA_REG
 481         printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
 482 #endif
 483         /* handle CR0-7 protection */
 484         if ((s->cr[0x11] & 0x80) && s->cr_index <= 7) {
 485             /* can always write bit 4 of CR7 */
 486             if (s->cr_index == 7)
 487                 s->cr[7] = (s->cr[7] & ~0x10) | (val & 0x10);
 488             return;
 489         }
 490         s->cr[s->cr_index] = val;
 491
 492         switch(s->cr_index) {
 493         case 0x00:
 494         case 0x04:
 495         case 0x05:
 496         case 0x06:
 497         case 0x07:
 498         case 0x11:
 499         case 0x17:
 500             s->update_retrace_info(s);
 501             break;
 502         }
 503         break;
 504     case 0x3ba:
 505     case 0x3da:
 506         s->fcr = val & 0x10;
 507         break;
 508     }
 509 }
 510
 511 #ifdef CONFIG_BOCHS_VBE
 512 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
 513 {
 514     VGACommonState *s = opaque;
 515     uint32_t val;
 516     val = s->vbe_index;
 517     return val;
 518 }
 519
 520 static uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
 521 {
 522     VGACommonState *s = opaque;
 523     uint32_t val;
 524
 525     if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
 526         if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
 527             switch(s->vbe_index) {
 528                 /* XXX: do not hardcode ? */
 529             case VBE_DISPI_INDEX_XRES:
 530                 val = VBE_DISPI_MAX_XRES;
 531                 break;
 532             case VBE_DISPI_INDEX_YRES:
 533                 val = VBE_DISPI_MAX_YRES;
 534                 break;
 535             case VBE_DISPI_INDEX_BPP:
 536                 val = VBE_DISPI_MAX_BPP;
 537                 break;
 538             default:
 539                 val = s->vbe_regs[s->vbe_index];
 540                 break;
 541             }
 542         } else {
 543             val = s->vbe_regs[s->vbe_index];
 544         }
 545     } else {
 546         val = 0;
 547     }
 548 #ifdef DEBUG_BOCHS_VBE
 549     printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
 550 #endif
 551     return val;
 552 }
 553
 554 static void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
 555 {
 556     VGACommonState *s = opaque;
 557     s->vbe_index = val;
 558 }
 559
 560 static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
 561 {
 562     VGACommonState *s = opaque;
 563
 564     if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
 565 #ifdef DEBUG_BOCHS_VBE
 566         printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
 567 #endif
 568         switch(s->vbe_index) {
 569         case VBE_DISPI_INDEX_ID:
 570             if (val == VBE_DISPI_ID0 ||
 571                 val == VBE_DISPI_ID1 ||
 572                 val == VBE_DISPI_ID2 ||
 573                 val == VBE_DISPI_ID3 ||
 574                 val == VBE_DISPI_ID4) {
 575                 s->vbe_regs[s->vbe_index] = val;
 576             }
 577             break;
 578         case VBE_DISPI_INDEX_XRES:
 579             if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
 580                 s->vbe_regs[s->vbe_index] = val;
 581             }
 582             break;
 583         case VBE_DISPI_INDEX_YRES:
 584             if (val <= VBE_DISPI_MAX_YRES) {
 585                 s->vbe_regs[s->vbe_index] = val;
 586             }
 587             break;
 588         case VBE_DISPI_INDEX_BPP:
 589             if (val == 0)
 590                 val = 8;
 591             if (val == 4 || val == 8 || val == 15 ||
 592                 val == 16 || val == 24 || val == 32) {
 593                 s->vbe_regs[s->vbe_index] = val;
 594             }
 595             break;
 596         case VBE_DISPI_INDEX_BANK:
 597             if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
 598               val &= (s->vbe_bank_mask >> 2);
 599             } else {
 600               val &= s->vbe_bank_mask;
 601             }
 602             s->vbe_regs[s->vbe_index] = val;
 603             s->bank_offset = (val << 16);
 604             break;
 605         case VBE_DISPI_INDEX_ENABLE:
 606             if ((val & VBE_DISPI_ENABLED) &&
 607                 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
 608                 int h, shift_control;
 609
 610                 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
 611                     s->vbe_regs[VBE_DISPI_INDEX_XRES];
 612                 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
 613                     s->vbe_regs[VBE_DISPI_INDEX_YRES];
 614                 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
 615                 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
 616
 617                 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
 618                     s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
 619                 else
 620                     s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
 621                         ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
 622                 s->vbe_start_addr = 0;
 623
 624                 /* clear the screen (should be done in BIOS) */
 625                 if (!(val & VBE_DISPI_NOCLEARMEM)) {
 626                     memset(s->vram_ptr, 0,
 627                            s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
 628                 }
 629
 630                 /* we initialize the VGA graphic mode (should be done
 631                    in BIOS) */
 632                 s->gr[0x06] = (s->gr[0x06] & ~0x0c) | 0x05; /* graphic mode + memory map 1 */
 633                 s->cr[0x17] |= 3; /* no CGA modes */
 634                 s->cr[0x13] = s->vbe_line_offset >> 3;
 635                 /* width */
 636                 s->cr[0x01] = (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
 637                 /* height (only meaningful if < 1024) */
 638                 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
 639                 s->cr[0x12] = h;
 640                 s->cr[0x07] = (s->cr[0x07] & ~0x42) |
 641                     ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
 642                 /* line compare to 1023 */
 643                 s->cr[0x18] = 0xff;
 644                 s->cr[0x07] |= 0x10;
 645                 s->cr[0x09] |= 0x40;
 646
 647                 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
 648                     shift_control = 0;
 649                     s->sr[0x01] &= ~8; /* no double line */
 650                 } else {
 651                     shift_control = 2;
 652                     s->sr[4] |= 0x08; /* set chain 4 mode */
 653                     s->sr[2] |= 0x0f; /* activate all planes */
 654                 }
 655                 s->gr[0x05] = (s->gr[0x05] & ~0x60) | (shift_control << 5);
 656                 s->cr[0x09] &= ~0x9f; /* no double scan */
 657             } else {
 658                 /* XXX: the bios should do that */
 659                 s->bank_offset = 0;
 660             }
 661             s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
 662             s->vbe_regs[s->vbe_index] = val;
 663             break;
 664         case VBE_DISPI_INDEX_VIRT_WIDTH:
 665             {
 666                 int w, h, line_offset;
 667
 668                 if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
 669                     return;
 670                 w = val;
 671                 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
 672                     line_offset = w >> 1;
 673                 else
 674                     line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
 675                 h = s->vram_size / line_offset;
 676                 /* XXX: support weird bochs semantics ? */
 677                 if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
 678                     return;
 679                 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
 680                 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
 681                 s->vbe_line_offset = line_offset;
 682             }
 683             break;
 684         case VBE_DISPI_INDEX_X_OFFSET:
 685         case VBE_DISPI_INDEX_Y_OFFSET:
 686             {
 687                 int x;
 688                 s->vbe_regs[s->vbe_index] = val;
 689                 s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
 690                 x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
 691                 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
 692                     s->vbe_start_addr += x >> 1;
 693                 else
 694                     s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
 695                 s->vbe_start_addr >>= 2;
 696             }
 697             break;
 698         default:
 699             break;
 700         }
 701     }
 702 }
 703 #endif
 704
 705 /* called for accesses between 0xa0000 and 0xc0000 */
 706 uint32_t vga_mem_readb(void *opaque, target_phys_addr_t addr)
 707 {
 708     VGACommonState *s = opaque;
 709     int memory_map_mode, plane;
 710     uint32_t ret;
 711
 712     /* convert to VGA memory offset */
 713     memory_map_mode = (s->gr[6] >> 2) & 3;
 714     addr &= 0x1ffff;
 715     switch(memory_map_mode) {
 716     case 0:
 717         break;
 718     case 1:
 719         if (addr >= 0x10000)
 720             return 0xff;
 721         addr += s->bank_offset;
 722         break;
 723     case 2:
 724         addr -= 0x10000;
 725         if (addr >= 0x8000)
 726             return 0xff;
 727         break;
 728     default:
 729     case 3:
 730         addr -= 0x18000;
 731         if (addr >= 0x8000)
 732             return 0xff;
 733         break;
 734     }
 735
 736     if (s->sr[4] & 0x08) {
 737         /* chain 4 mode : simplest access */
 738         ret = s->vram_ptr[addr];
 739     } else if (s->gr[5] & 0x10) {
 740         /* odd/even mode (aka text mode mapping) */
 741         plane = (s->gr[4] & 2) | (addr & 1);
 742         ret = s->vram_ptr[((addr & ~1) << 1) | plane];
 743     } else {
 744         /* standard VGA latched access */
 745         s->latch = ((uint32_t *)s->vram_ptr)[addr];
 746
 747         if (!(s->gr[5] & 0x08)) {
 748             /* read mode 0 */
 749             plane = s->gr[4];
 750             ret = GET_PLANE(s->latch, plane);
 751         } else {
 752             /* read mode 1 */
 753             ret = (s->latch ^ mask16[s->gr[2]]) & mask16[s->gr[7]];
 754             ret |= ret >> 16;
 755             ret |= ret >> 8;
 756             ret = (~ret) & 0xff;
 757         }
 758     }
 759     return ret;
 760 }
 761
 762 static uint32_t vga_mem_readw(void *opaque, target_phys_addr_t addr)
 763 {
 764     uint32_t v;
 765 #ifdef TARGET_WORDS_BIGENDIAN
 766     v = vga_mem_readb(opaque, addr) << 8;
 767     v |= vga_mem_readb(opaque, addr + 1);
 768 #else
 769     v = vga_mem_readb(opaque, addr);
 770     v |= vga_mem_readb(opaque, addr + 1) << 8;
 771 #endif
 772     return v;
 773 }
 774
 775 static uint32_t vga_mem_readl(void *opaque, target_phys_addr_t addr)
 776 {
 777     uint32_t v;
 778 #ifdef TARGET_WORDS_BIGENDIAN
 779     v = vga_mem_readb(opaque, addr) << 24;
 780     v |= vga_mem_readb(opaque, addr + 1) << 16;
 781     v |= vga_mem_readb(opaque, addr + 2) << 8;
 782     v |= vga_mem_readb(opaque, addr + 3);
 783 #else
 784     v = vga_mem_readb(opaque, addr);
 785     v |= vga_mem_readb(opaque, addr + 1) << 8;
 786     v |= vga_mem_readb(opaque, addr + 2) << 16;
 787     v |= vga_mem_readb(opaque, addr + 3) << 24;
 788 #endif
 789     return v;
 790 }
 791
 792 /* called for accesses between 0xa0000 and 0xc0000 */
 793 void vga_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 794 {
 795     VGACommonState *s = opaque;
 796     int memory_map_mode, plane, write_mode, b, func_select, mask;
 797     uint32_t write_mask, bit_mask, set_mask;
 798
 799 #ifdef DEBUG_VGA_MEM
 800     printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
 801 #endif
 802     /* convert to VGA memory offset */
 803     memory_map_mode = (s->gr[6] >> 2) & 3;
 804     addr &= 0x1ffff;
 805     switch(memory_map_mode) {
 806     case 0:
 807         break;
 808     case 1:
 809         if (addr >= 0x10000)
 810             return;
 811         addr += s->bank_offset;
 812         break;
 813     case 2:
 814         addr -= 0x10000;
 815         if (addr >= 0x8000)
 816             return;
 817         break;
 818     default:
 819     case 3:
 820         addr -= 0x18000;
 821         if (addr >= 0x8000)
 822             return;
 823         break;
 824     }
 825
 826     if (s->sr[4] & 0x08) {
 827         /* chain 4 mode : simplest access */
 828         plane = addr & 3;
 829         mask = (1 << plane);
 830         if (s->sr[2] & mask) {
 831             s->vram_ptr[addr] = val;
 832 #ifdef DEBUG_VGA_MEM
 833             printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
 834 #endif
 835             s->plane_updated |= mask; /* only used to detect font change */
 836             cpu_physical_memory_set_dirty(s->vram_offset + addr);
 837         }
 838     } else if (s->gr[5] & 0x10) {
 839         /* odd/even mode (aka text mode mapping) */
 840         plane = (s->gr[4] & 2) | (addr & 1);
 841         mask = (1 << plane);
 842         if (s->sr[2] & mask) {
 843             addr = ((addr & ~1) << 1) | plane;
 844             s->vram_ptr[addr] = val;
 845 #ifdef DEBUG_VGA_MEM
 846             printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
 847 #endif
 848             s->plane_updated |= mask; /* only used to detect font change */
 849             cpu_physical_memory_set_dirty(s->vram_offset + addr);
 850         }
 851     } else {
 852         /* standard VGA latched access */
 853         write_mode = s->gr[5] & 3;
 854         switch(write_mode) {
 855         default:
 856         case 0:
 857             /* rotate */
 858             b = s->gr[3] & 7;
 859             val = ((val >> b) | (val << (8 - b))) & 0xff;
 860             val |= val << 8;
 861             val |= val << 16;
 862
 863             /* apply set/reset mask */
 864             set_mask = mask16[s->gr[1]];
 865             val = (val & ~set_mask) | (mask16[s->gr[0]] & set_mask);
 866             bit_mask = s->gr[8];
 867             break;
 868         case 1:
 869             val = s->latch;
 870             goto do_write;
 871         case 2:
 872             val = mask16[val & 0x0f];
 873             bit_mask = s->gr[8];
 874             break;
 875         case 3:
 876             /* rotate */
 877             b = s->gr[3] & 7;
 878             val = (val >> b) | (val << (8 - b));
 879
 880             bit_mask = s->gr[8] & val;
 881             val = mask16[s->gr[0]];
 882             break;
 883         }
 884
 885         /* apply logical operation */
 886         func_select = s->gr[3] >> 3;
 887         switch(func_select) {
 888         case 0:
 889         default:
 890             /* nothing to do */
 891             break;
 892         case 1:
 893             /* and */
 894             val &= s->latch;
 895             break;
 896         case 2:
 897             /* or */
 898             val |= s->latch;
 899             break;
 900         case 3:
 901             /* xor */
 902             val ^= s->latch;
 903             break;
 904         }
 905
 906         /* apply bit mask */
 907         bit_mask |= bit_mask << 8;
 908         bit_mask |= bit_mask << 16;
 909         val = (val & bit_mask) | (s->latch & ~bit_mask);
 910
 911     do_write:
 912         /* mask data according to sr[2] */
 913         mask = s->sr[2];
 914         s->plane_updated |= mask; /* only used to detect font change */
 915         write_mask = mask16[mask];
 916         ((uint32_t *)s->vram_ptr)[addr] =
 917             (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
 918             (val & write_mask);
 919 #ifdef DEBUG_VGA_MEM
 920         printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
 921                addr * 4, write_mask, val);
 922 #endif
 923         cpu_physical_memory_set_dirty(s->vram_offset + (addr << 2));
 924     }
 925 }
 926
 927 static void vga_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 928 {
 929 #ifdef TARGET_WORDS_BIGENDIAN
 930     vga_mem_writeb(opaque, addr, (val >> 8) & 0xff);
 931     vga_mem_writeb(opaque, addr + 1, val & 0xff);
 932 #else
 933     vga_mem_writeb(opaque, addr, val & 0xff);
 934     vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 935 #endif
 936 }
 937
 938 static void vga_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 939 {
 940 #ifdef TARGET_WORDS_BIGENDIAN
 941     vga_mem_writeb(opaque, addr, (val >> 24) & 0xff);
 942     vga_mem_writeb(opaque, addr + 1, (val >> 16) & 0xff);
 943     vga_mem_writeb(opaque, addr + 2, (val >> 8) & 0xff);
 944     vga_mem_writeb(opaque, addr + 3, val & 0xff);
 945 #else
 946     vga_mem_writeb(opaque, addr, val & 0xff);
 947     vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 948     vga_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 949     vga_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 950 #endif
 951 }
 952
 953 typedef void vga_draw_glyph8_func(uint8_t *d, int linesize,
 954                              const uint8_t *font_ptr, int h,
 955                              uint32_t fgcol, uint32_t bgcol);
 956 typedef void vga_draw_glyph9_func(uint8_t *d, int linesize,
 957                                   const uint8_t *font_ptr, int h,
 958                                   uint32_t fgcol, uint32_t bgcol, int dup9);
 959 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
 960                                 const uint8_t *s, int width);
 961
 962 #define DEPTH 8
 963 #include "vga_template.h"
 964
 965 #define DEPTH 15
 966 #include "vga_template.h"
 967
 968 #define BGR_FORMAT
 969 #define DEPTH 15
 970 #include "vga_template.h"
 971
 972 #define DEPTH 16
 973 #include "vga_template.h"
 974
 975 #define BGR_FORMAT
 976 #define DEPTH 16
 977 #include "vga_template.h"
 978
 979 #define DEPTH 32
 980 #include "vga_template.h"
 981
 982 #define BGR_FORMAT
 983 #define DEPTH 32
 984 #include "vga_template.h"
 985
 986 static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b)
 987 {
 988     unsigned int col;
 989     col = rgb_to_pixel8(r, g, b);
 990     col |= col << 8;
 991     col |= col << 16;
 992     return col;
 993 }
 994
 995 static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b)
 996 {
 997     unsigned int col;
 998     col = rgb_to_pixel15(r, g, b);
 999     col |= col << 16;
1000     return col;
1001 }
1002
1003 static unsigned int rgb_to_pixel15bgr_dup(unsigned int r, unsigned int g,
1004                                           unsigned int b)
1005 {
1006     unsigned int col;
1007     col = rgb_to_pixel15bgr(r, g, b);
1008     col |= col << 16;
1009     return col;
1010 }
1011
1012 static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b)
1013 {
1014     unsigned int col;
1015     col = rgb_to_pixel16(r, g, b);
1016     col |= col << 16;
1017     return col;
1018 }
1019
1020 static unsigned int rgb_to_pixel16bgr_dup(unsigned int r, unsigned int g,
1021                                           unsigned int b)
1022 {
1023     unsigned int col;
1024     col = rgb_to_pixel16bgr(r, g, b);
1025     col |= col << 16;
1026     return col;
1027 }
1028
1029 static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b)
1030 {
1031     unsigned int col;
1032     col = rgb_to_pixel32(r, g, b);
1033     return col;
1034 }
1035
1036 static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
1037 {
1038     unsigned int col;
1039     col = rgb_to_pixel32bgr(r, g, b);
1040     return col;
1041 }
1042
1043 /* return true if the palette was modified */
1044 static int update_palette16(VGACommonState *s)
1045 {
1046     int full_update, i;
1047     uint32_t v, col, *palette;
1048
1049     full_update = 0;
1050     palette = s->last_palette;
1051     for(i = 0; i < 16; i++) {
1052         v = s->ar[i];
1053         if (s->ar[0x10] & 0x80)
1054             v = ((s->ar[0x14] & 0xf) << 4) | (v & 0xf);
1055         else
1056             v = ((s->ar[0x14] & 0xc) << 4) | (v & 0x3f);
1057         v = v * 3;
1058         col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1059                               c6_to_8(s->palette[v + 1]),
1060                               c6_to_8(s->palette[v + 2]));
1061         if (col != palette[i]) {
1062             full_update = 1;
1063             palette[i] = col;
1064         }
1065     }
1066     return full_update;
1067 }
1068
1069 /* return true if the palette was modified */
1070 static int update_palette256(VGACommonState *s)
1071 {
1072     int full_update, i;
1073     uint32_t v, col, *palette;
1074
1075     full_update = 0;
1076     palette = s->last_palette;
1077     v = 0;
1078     for(i = 0; i < 256; i++) {
1079         if (s->dac_8bit) {
1080           col = s->rgb_to_pixel(s->palette[v],
1081                                 s->palette[v + 1],
1082                                 s->palette[v + 2]);
1083         } else {
1084           col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1085                                 c6_to_8(s->palette[v + 1]),
1086                                 c6_to_8(s->palette[v + 2]));
1087         }
1088         if (col != palette[i]) {
1089             full_update = 1;
1090             palette[i] = col;
1091         }
1092         v += 3;
1093     }
1094     return full_update;
1095 }
1096
1097 static void vga_get_offsets(VGACommonState *s,
1098                             uint32_t *pline_offset,
1099                             uint32_t *pstart_addr,
1100                             uint32_t *pline_compare)
1101 {
1102     uint32_t start_addr, line_offset, line_compare;
1103 #ifdef CONFIG_BOCHS_VBE
1104     if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1105         line_offset = s->vbe_line_offset;
1106         start_addr = s->vbe_start_addr;
1107         line_compare = 65535;
1108     } else
1109 #endif
1110     {
1111         /* compute line_offset in bytes */
1112         line_offset = s->cr[0x13];
1113         line_offset <<= 3;
1114
1115         /* starting address */
1116         start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8);
1117
1118         /* line compare */
1119         line_compare = s->cr[0x18] |
1120             ((s->cr[0x07] & 0x10) << 4) |
1121             ((s->cr[0x09] & 0x40) << 3);
1122     }
1123     *pline_offset = line_offset;
1124     *pstart_addr = start_addr;
1125     *pline_compare = line_compare;
1126 }
1127
1128 /* update start_addr and line_offset. Return TRUE if modified */
1129 static int update_basic_params(VGACommonState *s)
1130 {
1131     int full_update;
1132     uint32_t start_addr, line_offset, line_compare;
1133
1134     full_update = 0;
1135
1136     s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1137
1138     if (line_offset != s->line_offset ||
1139         start_addr != s->start_addr ||
1140         line_compare != s->line_compare) {
1141         s->line_offset = line_offset;
1142         s->start_addr = start_addr;
1143         s->line_compare = line_compare;
1144         full_update = 1;
1145     }
1146     return full_update;
1147 }
1148
1149 #define NB_DEPTHS 7
1150
1151 static inline int get_depth_index(DisplayState *s)
1152 {
1153     switch(ds_get_bits_per_pixel(s)) {
1154     default:
1155     case 8:
1156         return 0;
1157     case 15:
1158         return 1;
1159     case 16:
1160         return 2;
1161     case 32:
1162         if (is_surface_bgr(s->surface))
1163             return 4;
1164         else
1165             return 3;
1166     }
1167 }
1168
1169 static vga_draw_glyph8_func *vga_draw_glyph8_table[NB_DEPTHS] = {
1170     vga_draw_glyph8_8,
1171     vga_draw_glyph8_16,
1172     vga_draw_glyph8_16,
1173     vga_draw_glyph8_32,
1174     vga_draw_glyph8_32,
1175     vga_draw_glyph8_16,
1176     vga_draw_glyph8_16,
1177 };
1178
1179 static vga_draw_glyph8_func *vga_draw_glyph16_table[NB_DEPTHS] = {
1180     vga_draw_glyph16_8,
1181     vga_draw_glyph16_16,
1182     vga_draw_glyph16_16,
1183     vga_draw_glyph16_32,
1184     vga_draw_glyph16_32,
1185     vga_draw_glyph16_16,
1186     vga_draw_glyph16_16,
1187 };
1188
1189 static vga_draw_glyph9_func *vga_draw_glyph9_table[NB_DEPTHS] = {
1190     vga_draw_glyph9_8,
1191     vga_draw_glyph9_16,
1192     vga_draw_glyph9_16,
1193     vga_draw_glyph9_32,
1194     vga_draw_glyph9_32,
1195     vga_draw_glyph9_16,
1196     vga_draw_glyph9_16,
1197 };
1198
1199 static const uint8_t cursor_glyph[32 * 4] = {
1200     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1201     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1202     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1203     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1204     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1205     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1206     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1207     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1208     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1209     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1210     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1211     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1212     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1213     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1214     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1215     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1216 };
1217
1218 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1219                                     int *pcwidth, int *pcheight)
1220 {
1221     int width, cwidth, height, cheight;
1222
1223     /* total width & height */
1224     cheight = (s->cr[9] & 0x1f) + 1;
1225     cwidth = 8;
1226     if (!(s->sr[1] & 0x01))
1227         cwidth = 9;
1228     if (s->sr[1] & 0x08)
1229         cwidth = 16; /* NOTE: no 18 pixel wide */
1230     width = (s->cr[0x01] + 1);
1231     if (s->cr[0x06] == 100) {
1232         /* ugly hack for CGA 160x100x16 - explain me the logic */
1233         height = 100;
1234     } else {
1235         height = s->cr[0x12] |
1236             ((s->cr[0x07] & 0x02) << 7) |
1237             ((s->cr[0x07] & 0x40) << 3);
1238         height = (height + 1) / cheight;
1239     }
1240
1241     *pwidth = width;
1242     *pheight = height;
1243     *pcwidth = cwidth;
1244     *pcheight = cheight;
1245 }
1246
1247 typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
1248
1249 static rgb_to_pixel_dup_func *rgb_to_pixel_dup_table[NB_DEPTHS] = {
1250     rgb_to_pixel8_dup,
1251     rgb_to_pixel15_dup,
1252     rgb_to_pixel16_dup,
1253     rgb_to_pixel32_dup,
1254     rgb_to_pixel32bgr_dup,
1255     rgb_to_pixel15bgr_dup,
1256     rgb_to_pixel16bgr_dup,
1257 };
1258
1259 /*
1260  * Text mode update
1261  * Missing:
1262  * - double scan
1263  * - double width
1264  * - underline
1265  * - flashing
1266  */
1267 static void vga_draw_text(VGACommonState *s, int full_update)
1268 {
1269     int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1270     int cx_min, cx_max, linesize, x_incr, line, line1;
1271     uint32_t offset, fgcol, bgcol, v, cursor_offset;
1272     uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1273     const uint8_t *font_ptr, *font_base[2];
1274     int dup9, line_offset, depth_index;
1275     uint32_t *palette;
1276     uint32_t *ch_attr_ptr;
1277     vga_draw_glyph8_func *vga_draw_glyph8;
1278     vga_draw_glyph9_func *vga_draw_glyph9;
1279
1280     /* compute font data address (in plane 2) */
1281     v = s->sr[3];
1282     offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1283     if (offset != s->font_offsets[0]) {
1284         s->font_offsets[0] = offset;
1285         full_update = 1;
1286     }
1287     font_base[0] = s->vram_ptr + offset;
1288
1289     offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1290     font_base[1] = s->vram_ptr + offset;
1291     if (offset != s->font_offsets[1]) {
1292         s->font_offsets[1] = offset;
1293         full_update = 1;
1294     }
1295     if (s->plane_updated & (1 << 2)) {
1296         /* if the plane 2 was modified since the last display, it
1297            indicates the font may have been modified */
1298         s->plane_updated = 0;
1299         full_update = 1;
1300     }
1301     full_update |= update_basic_params(s);
1302
1303     line_offset = s->line_offset;
1304
1305     vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1306     x_incr = cw * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
1307     if ((height * width) > CH_ATTR_SIZE) {
1308         /* better than nothing: exit if transient size is too big */
1309         return;
1310     }
1311
1312     if (width != s->last_width || height != s->last_height ||
1313         cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1314         s->last_scr_width = width * cw;
1315         s->last_scr_height = height * cheight;
1316         qemu_console_resize(s->ds, s->last_scr_width, s->last_scr_height);
1317         s->last_depth = 0;
1318         s->last_width = width;
1319         s->last_height = height;
1320         s->last_ch = cheight;
1321         s->last_cw = cw;
1322         full_update = 1;
1323     }
1324     s->rgb_to_pixel =
1325         rgb_to_pixel_dup_table[get_depth_index(s->ds)];
1326     full_update |= update_palette16(s);
1327     palette = s->last_palette;
1328     x_incr = cw * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
1329
1330     cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr;
1331     if (cursor_offset != s->cursor_offset ||
1332         s->cr[0xa] != s->cursor_start ||
1333         s->cr[0xb] != s->cursor_end) {
1334       /* if the cursor position changed, we update the old and new
1335          chars */
1336         if (s->cursor_offset < CH_ATTR_SIZE)
1337             s->last_ch_attr[s->cursor_offset] = -1;
1338         if (cursor_offset < CH_ATTR_SIZE)
1339             s->last_ch_attr[cursor_offset] = -1;
1340         s->cursor_offset = cursor_offset;
1341         s->cursor_start = s->cr[0xa];
1342         s->cursor_end = s->cr[0xb];
1343     }
1344     cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1345
1346     depth_index = get_depth_index(s->ds);
1347     if (cw == 16)
1348         vga_draw_glyph8 = vga_draw_glyph16_table[depth_index];
1349     else
1350         vga_draw_glyph8 = vga_draw_glyph8_table[depth_index];
1351     vga_draw_glyph9 = vga_draw_glyph9_table[depth_index];
1352
1353     dest = ds_get_data(s->ds);
1354     linesize = ds_get_linesize(s->ds);
1355     ch_attr_ptr = s->last_ch_attr;
1356     line = 0;
1357     offset = s->start_addr * 4;
1358     for(cy = 0; cy < height; cy++) {
1359         d1 = dest;
1360         src = s->vram_ptr + offset;
1361         cx_min = width;
1362         cx_max = -1;
1363         for(cx = 0; cx < width; cx++) {
1364             ch_attr = *(uint16_t *)src;
1365             if (full_update || ch_attr != *ch_attr_ptr) {
1366                 if (cx < cx_min)
1367                     cx_min = cx;
1368                 if (cx > cx_max)
1369                     cx_max = cx;
1370                 *ch_attr_ptr = ch_attr;
1371 #ifdef HOST_WORDS_BIGENDIAN
1372                 ch = ch_attr >> 8;
1373                 cattr = ch_attr & 0xff;
1374 #else
1375                 ch = ch_attr & 0xff;
1376                 cattr = ch_attr >> 8;
1377 #endif
1378                 font_ptr = font_base[(cattr >> 3) & 1];
1379                 font_ptr += 32 * 4 * ch;
1380                 bgcol = palette[cattr >> 4];
1381                 fgcol = palette[cattr & 0x0f];
1382                 if (cw != 9) {
1383                     vga_draw_glyph8(d1, linesize,
1384                                     font_ptr, cheight, fgcol, bgcol);
1385                 } else {
1386                     dup9 = 0;
1387                     if (ch >= 0xb0 && ch <= 0xdf && (s->ar[0x10] & 0x04))
1388                         dup9 = 1;
1389                     vga_draw_glyph9(d1, linesize,
1390                                     font_ptr, cheight, fgcol, bgcol, dup9);
1391                 }
1392                 if (src == cursor_ptr &&
1393                     !(s->cr[0x0a] & 0x20)) {
1394                     int line_start, line_last, h;
1395                     /* draw the cursor */
1396                     line_start = s->cr[0x0a] & 0x1f;
1397                     line_last = s->cr[0x0b] & 0x1f;
1398                     /* XXX: check that */
1399                     if (line_last > cheight - 1)
1400                         line_last = cheight - 1;
1401                     if (line_last >= line_start && line_start < cheight) {
1402                         h = line_last - line_start + 1;
1403                         d = d1 + linesize * line_start;
1404                         if (cw != 9) {
1405                             vga_draw_glyph8(d, linesize,
1406                                             cursor_glyph, h, fgcol, bgcol);
1407                         } else {
1408                             vga_draw_glyph9(d, linesize,
1409                                             cursor_glyph, h, fgcol, bgcol, 1);
1410                         }
1411                     }
1412                 }
1413             }
1414             d1 += x_incr;
1415             src += 4;
1416             ch_attr_ptr++;
1417         }
1418         if (cx_max != -1) {
1419             dpy_update(s->ds, cx_min * cw, cy * cheight,
1420                        (cx_max - cx_min + 1) * cw, cheight);
1421         }
1422         dest += linesize * cheight;
1423         line1 = line + cheight;
1424         offset += line_offset;
1425         if (line < s->line_compare && line1 >= s->line_compare) {
1426             offset = 0;
1427         }
1428         line = line1;
1429     }
1430 }
1431
1432 enum {
1433     VGA_DRAW_LINE2,
1434     VGA_DRAW_LINE2D2,
1435     VGA_DRAW_LINE4,
1436     VGA_DRAW_LINE4D2,
1437     VGA_DRAW_LINE8D2,
1438     VGA_DRAW_LINE8,
1439     VGA_DRAW_LINE15,
1440     VGA_DRAW_LINE16,
1441     VGA_DRAW_LINE24,
1442     VGA_DRAW_LINE32,
1443     VGA_DRAW_LINE_NB,
1444 };
1445
1446 static vga_draw_line_func *vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
1447     vga_draw_line2_8,
1448     vga_draw_line2_16,
1449     vga_draw_line2_16,
1450     vga_draw_line2_32,
1451     vga_draw_line2_32,
1452     vga_draw_line2_16,
1453     vga_draw_line2_16,
1454
1455     vga_draw_line2d2_8,
1456     vga_draw_line2d2_16,
1457     vga_draw_line2d2_16,
1458     vga_draw_line2d2_32,
1459     vga_draw_line2d2_32,
1460     vga_draw_line2d2_16,
1461     vga_draw_line2d2_16,
1462
1463     vga_draw_line4_8,
1464     vga_draw_line4_16,
1465     vga_draw_line4_16,
1466     vga_draw_line4_32,
1467     vga_draw_line4_32,
1468     vga_draw_line4_16,
1469     vga_draw_line4_16,
1470
1471     vga_draw_line4d2_8,
1472     vga_draw_line4d2_16,
1473     vga_draw_line4d2_16,
1474     vga_draw_line4d2_32,
1475     vga_draw_line4d2_32,
1476     vga_draw_line4d2_16,
1477     vga_draw_line4d2_16,
1478
1479     vga_draw_line8d2_8,
1480     vga_draw_line8d2_16,
1481     vga_draw_line8d2_16,
1482     vga_draw_line8d2_32,
1483     vga_draw_line8d2_32,
1484     vga_draw_line8d2_16,
1485     vga_draw_line8d2_16,
1486
1487     vga_draw_line8_8,
1488     vga_draw_line8_16,
1489     vga_draw_line8_16,
1490     vga_draw_line8_32,
1491     vga_draw_line8_32,
1492     vga_draw_line8_16,
1493     vga_draw_line8_16,
1494
1495     vga_draw_line15_8,
1496     vga_draw_line15_15,
1497     vga_draw_line15_16,
1498     vga_draw_line15_32,
1499     vga_draw_line15_32bgr,
1500     vga_draw_line15_15bgr,
1501     vga_draw_line15_16bgr,
1502
1503     vga_draw_line16_8,
1504     vga_draw_line16_15,
1505     vga_draw_line16_16,
1506     vga_draw_line16_32,
1507     vga_draw_line16_32bgr,
1508     vga_draw_line16_15bgr,
1509     vga_draw_line16_16bgr,
1510
1511     vga_draw_line24_8,
1512     vga_draw_line24_15,
1513     vga_draw_line24_16,
1514     vga_draw_line24_32,
1515     vga_draw_line24_32bgr,
1516     vga_draw_line24_15bgr,
1517     vga_draw_line24_16bgr,
1518
1519     vga_draw_line32_8,
1520     vga_draw_line32_15,
1521     vga_draw_line32_16,
1522     vga_draw_line32_32,
1523     vga_draw_line32_32bgr,
1524     vga_draw_line32_15bgr,
1525     vga_draw_line32_16bgr,
1526 };
1527
1528 static int vga_get_bpp(VGACommonState *s)
1529 {
1530     int ret;
1531 #ifdef CONFIG_BOCHS_VBE
1532     if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1533         ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1534     } else
1535 #endif
1536     {
1537         ret = 0;
1538     }
1539     return ret;
1540 }
1541
1542 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1543 {
1544     int width, height;
1545
1546 #ifdef CONFIG_BOCHS_VBE
1547     if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1548         width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1549         height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1550     } else
1551 #endif
1552     {
1553         width = (s->cr[0x01] + 1) * 8;
1554         height = s->cr[0x12] |
1555             ((s->cr[0x07] & 0x02) << 7) |
1556             ((s->cr[0x07] & 0x40) << 3);
1557         height = (height + 1);
1558     }
1559     *pwidth = width;
1560     *pheight = height;
1561 }
1562
1563 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1564 {
1565     int y;
1566     if (y1 >= VGA_MAX_HEIGHT)
1567         return;
1568     if (y2 >= VGA_MAX_HEIGHT)
1569         y2 = VGA_MAX_HEIGHT;
1570     for(y = y1; y < y2; y++) {
1571         s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1572     }
1573 }
1574
1575 static void vga_sync_dirty_bitmap(VGACommonState *s)
1576 {
1577     if (s->map_addr)
1578         cpu_physical_sync_dirty_bitmap(s->map_addr, s->map_end);
1579
1580     if (s->lfb_vram_mapped) {
1581         cpu_physical_sync_dirty_bitmap(isa_mem_base + 0xa0000, 0xa8000);
1582         cpu_physical_sync_dirty_bitmap(isa_mem_base + 0xa8000, 0xb0000);
1583     }
1584 }
1585
1586 void vga_dirty_log_start(VGACommonState *s)
1587 {
1588     if (kvm_enabled() && s->map_addr)
1589         kvm_log_start(s->map_addr, s->map_end - s->map_addr);
1590
1591     if (kvm_enabled() && s->lfb_vram_mapped) {
1592         kvm_log_start(isa_mem_base + 0xa0000, 0x8000);
1593         kvm_log_start(isa_mem_base + 0xa8000, 0x8000);
1594     }
1595 }
1596
1597 /*
1598  * graphic modes
1599  */
1600 static void vga_draw_graphic(VGACommonState *s, int full_update)
1601 {
1602     int y1, y, update, linesize, y_start, double_scan, mask, depth;
1603     int width, height, shift_control, line_offset, bwidth, bits;
1604     ram_addr_t page0, page1, page_min, page_max;
1605     int disp_width, multi_scan, multi_run;
1606     uint8_t *d;
1607     uint32_t v, addr1, addr;
1608     vga_draw_line_func *vga_draw_line;
1609
1610     full_update |= update_basic_params(s);
1611
1612     if (!full_update)
1613         vga_sync_dirty_bitmap(s);
1614
1615     s->get_resolution(s, &width, &height);
1616     disp_width = width;
1617
1618     shift_control = (s->gr[0x05] >> 5) & 3;
1619     double_scan = (s->cr[0x09] >> 7);
1620     if (shift_control != 1) {
1621         multi_scan = (((s->cr[0x09] & 0x1f) + 1) << double_scan) - 1;
1622     } else {
1623         /* in CGA modes, multi_scan is ignored */
1624         /* XXX: is it correct ? */
1625         multi_scan = double_scan;
1626     }
1627     multi_run = multi_scan;
1628     if (shift_control != s->shift_control ||
1629         double_scan != s->double_scan) {
1630         full_update = 1;
1631         s->shift_control = shift_control;
1632         s->double_scan = double_scan;
1633     }
1634
1635     if (shift_control == 0) {
1636         if (s->sr[0x01] & 8) {
1637             disp_width <<= 1;
1638         }
1639     } else if (shift_control == 1) {
1640         if (s->sr[0x01] & 8) {
1641             disp_width <<= 1;
1642         }
1643     }
1644
1645     depth = s->get_bpp(s);
1646     if (s->line_offset != s->last_line_offset ||
1647         disp_width != s->last_width ||
1648         height != s->last_height ||
1649         s->last_depth != depth) {
1650 #if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
1651         if (depth == 16 || depth == 32) {
1652 #else
1653         if (depth == 32) {
1654 #endif
1655             qemu_free_displaysurface(s->ds);
1656             s->ds->surface = qemu_create_displaysurface_from(disp_width, height, depth,
1657                     s->line_offset,
1658                     s->vram_ptr + (s->start_addr * 4));
1659 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
1660             s->ds->surface->pf = qemu_different_endianness_pixelformat(depth);
1661 #endif
1662             dpy_resize(s->ds);
1663         } else {
1664             qemu_console_resize(s->ds, disp_width, height);
1665         }
1666         s->last_scr_width = disp_width;
1667         s->last_scr_height = height;
1668         s->last_width = disp_width;
1669         s->last_height = height;
1670         s->last_line_offset = s->line_offset;
1671         s->last_depth = depth;
1672         full_update = 1;
1673     } else if (is_buffer_shared(s->ds->surface) &&
1674                (full_update || s->ds->surface->data != s->vram_ptr + (s->start_addr * 4))) {
1675         s->ds->surface->data = s->vram_ptr + (s->start_addr * 4);
1676         dpy_setdata(s->ds);
1677     }
1678
1679     s->rgb_to_pixel =
1680         rgb_to_pixel_dup_table[get_depth_index(s->ds)];
1681
1682     if (shift_control == 0) {
1683         full_update |= update_palette16(s);
1684         if (s->sr[0x01] & 8) {
1685             v = VGA_DRAW_LINE4D2;
1686         } else {
1687             v = VGA_DRAW_LINE4;
1688         }
1689         bits = 4;
1690     } else if (shift_control == 1) {
1691         full_update |= update_palette16(s);
1692         if (s->sr[0x01] & 8) {
1693             v = VGA_DRAW_LINE2D2;
1694         } else {
1695             v = VGA_DRAW_LINE2;
1696         }
1697         bits = 4;
1698     } else {
1699         switch(s->get_bpp(s)) {
1700         default:
1701         case 0:
1702             full_update |= update_palette256(s);
1703             v = VGA_DRAW_LINE8D2;
1704             bits = 4;
1705             break;
1706         case 8:
1707             full_update |= update_palette256(s);
1708             v = VGA_DRAW_LINE8;
1709             bits = 8;
1710             break;
1711         case 15:
1712             v = VGA_DRAW_LINE15;
1713             bits = 16;
1714             break;
1715         case 16:
1716             v = VGA_DRAW_LINE16;
1717             bits = 16;
1718             break;
1719         case 24:
1720             v = VGA_DRAW_LINE24;
1721             bits = 24;
1722             break;
1723         case 32:
1724             v = VGA_DRAW_LINE32;
1725             bits = 32;
1726             break;
1727         }
1728     }
1729     vga_draw_line = vga_draw_line_table[v * NB_DEPTHS + get_depth_index(s->ds)];
1730
1731     if (!is_buffer_shared(s->ds->surface) && s->cursor_invalidate)
1732         s->cursor_invalidate(s);
1733
1734     line_offset = s->line_offset;
1735 #if 0
1736     printf("w=%d h=%d v=%d line_offset=%d cr[0x09]=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=0x%02x\n",
1737            width, height, v, line_offset, s->cr[9], s->cr[0x17], s->line_compare, s->sr[0x01]);
1738 #endif
1739     addr1 = (s->start_addr * 4);
1740     bwidth = (width * bits + 7) / 8;
1741     y_start = -1;
1742     page_min = -1;
1743     page_max = 0;
1744     d = ds_get_data(s->ds);
1745     linesize = ds_get_linesize(s->ds);
1746     y1 = 0;
1747     for(y = 0; y < height; y++) {
1748         addr = addr1;
1749         if (!(s->cr[0x17] & 1)) {
1750             int shift;
1751             /* CGA compatibility handling */
1752             shift = 14 + ((s->cr[0x17] >> 6) & 1);
1753             addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1754         }
1755         if (!(s->cr[0x17] & 2)) {
1756             addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1757         }
1758         page0 = s->vram_offset + (addr & TARGET_PAGE_MASK);
1759         page1 = s->vram_offset + ((addr + bwidth - 1) & TARGET_PAGE_MASK);
1760         update = full_update |
1761             cpu_physical_memory_get_dirty(page0, VGA_DIRTY_FLAG) |
1762             cpu_physical_memory_get_dirty(page1, VGA_DIRTY_FLAG);
1763         if ((page1 - page0) > TARGET_PAGE_SIZE) {
1764             /* if wide line, can use another page */
1765             update |= cpu_physical_memory_get_dirty(page0 + TARGET_PAGE_SIZE,
1766                                                     VGA_DIRTY_FLAG);
1767         }
1768         /* explicit invalidation for the hardware cursor */
1769         update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1770         if (update) {
1771             if (y_start < 0)
1772                 y_start = y;
1773             if (page0 < page_min)
1774                 page_min = page0;
1775             if (page1 > page_max)
1776                 page_max = page1;
1777             if (!(is_buffer_shared(s->ds->surface))) {
1778                 vga_draw_line(s, d, s->vram_ptr + addr, width);
1779                 if (s->cursor_draw_line)
1780                     s->cursor_draw_line(s, d, y);
1781             }
1782         } else {
1783             if (y_start >= 0) {
1784                 /* flush to display */
1785                 dpy_update(s->ds, 0, y_start,
1786                            disp_width, y - y_start);
1787                 y_start = -1;
1788             }
1789         }
1790         if (!multi_run) {
1791             mask = (s->cr[0x17] & 3) ^ 3;
1792             if ((y1 & mask) == mask)
1793                 addr1 += line_offset;
1794             y1++;
1795             multi_run = multi_scan;
1796         } else {
1797             multi_run--;
1798         }
1799         /* line compare acts on the displayed lines */
1800         if (y == s->line_compare)
1801             addr1 = 0;
1802         d += linesize;
1803     }
1804     if (y_start >= 0) {
1805         /* flush to display */
1806         dpy_update(s->ds, 0, y_start,
1807                    disp_width, y - y_start);
1808     }
1809     /* reset modified pages */
1810     if (page_max >= page_min) {
1811         cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
1812                                         VGA_DIRTY_FLAG);
1813     }
1814     memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1815 }
1816
1817 static void vga_draw_blank(VGACommonState *s, int full_update)
1818 {
1819     int i, w, val;
1820     uint8_t *d;
1821
1822     if (!full_update)
1823         return;
1824     if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1825         return;
1826
1827     s->rgb_to_pixel =
1828         rgb_to_pixel_dup_table[get_depth_index(s->ds)];
1829     if (ds_get_bits_per_pixel(s->ds) == 8)
1830         val = s->rgb_to_pixel(0, 0, 0);
1831     else
1832         val = 0;
1833     w = s->last_scr_width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
1834     d = ds_get_data(s->ds);
1835     for(i = 0; i < s->last_scr_height; i++) {
1836         memset(d, val, w);
1837         d += ds_get_linesize(s->ds);
1838     }
1839     dpy_update(s->ds, 0, 0,
1840                s->last_scr_width, s->last_scr_height);
1841 }
1842
1843 #define GMODE_TEXT     0
1844 #define GMODE_GRAPH    1
1845 #define GMODE_BLANK 2
1846
1847 static void vga_update_display(void *opaque)
1848 {
1849     VGACommonState *s = opaque;
1850     int full_update, graphic_mode;
1851
1852     if (ds_get_bits_per_pixel(s->ds) == 0) {
1853         /* nothing to do */
1854     } else {
1855         full_update = s->full_update;
1856         s->full_update = 0;
1857         if (!(s->ar_index & 0x20)) {
1858             graphic_mode = GMODE_BLANK;
1859         } else {
1860             graphic_mode = s->gr[6] & 1;
1861         }
1862         if (graphic_mode != s->graphic_mode) {
1863             s->graphic_mode = graphic_mode;
1864             full_update = 1;
1865         }
1866         switch(graphic_mode) {
1867         case GMODE_TEXT:
1868             vga_draw_text(s, full_update);
1869             break;
1870         case GMODE_GRAPH:
1871             vga_draw_graphic(s, full_update);
1872             break;
1873         case GMODE_BLANK:
1874         default:
1875             vga_draw_blank(s, full_update);
1876             break;
1877         }
1878     }
1879 }
1880
1881 /* force a full display refresh */
1882 static void vga_invalidate_display(void *opaque)
1883 {
1884     VGACommonState *s = opaque;
1885
1886     s->full_update = 1;
1887 }
1888
1889 void vga_common_reset(VGACommonState *s)
1890 {
1891     s->lfb_addr = 0;
1892     s->lfb_end = 0;
1893     s->map_addr = 0;
1894     s->map_end = 0;
1895     s->lfb_vram_mapped = 0;
1896     s->bios_offset = 0;
1897     s->bios_size = 0;
1898     s->sr_index = 0;
1899     memset(s->sr, '\0', sizeof(s->sr));
1900     s->gr_index = 0;
1901     memset(s->gr, '\0', sizeof(s->gr));
1902     s->ar_index = 0;
1903     memset(s->ar, '\0', sizeof(s->ar));
1904     s->ar_flip_flop = 0;
1905     s->cr_index = 0;
1906     memset(s->cr, '\0', sizeof(s->cr));
1907     s->msr = 0;
1908     s->fcr = 0;
1909     s->st00 = 0;
1910     s->st01 = 0;
1911     s->dac_state = 0;
1912     s->dac_sub_index = 0;
1913     s->dac_read_index = 0;
1914     s->dac_write_index = 0;
1915     memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1916     s->dac_8bit = 0;
1917     memset(s->palette, '\0', sizeof(s->palette));
1918     s->bank_offset = 0;
1919 #ifdef CONFIG_BOCHS_VBE
1920     s->vbe_index = 0;
1921     memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1922     s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID0;
1923     s->vbe_start_addr = 0;
1924     s->vbe_line_offset = 0;
1925     s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1926 #endif
1927     memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1928     s->graphic_mode = -1; /* force full update */
1929     s->shift_control = 0;
1930     s->double_scan = 0;
1931     s->line_offset = 0;
1932     s->line_compare = 0;
1933     s->start_addr = 0;
1934     s->plane_updated = 0;
1935     s->last_cw = 0;
1936     s->last_ch = 0;
1937     s->last_width = 0;
1938     s->last_height = 0;
1939     s->last_scr_width = 0;
1940     s->last_scr_height = 0;
1941     s->cursor_start = 0;
1942     s->cursor_end = 0;
1943     s->cursor_offset = 0;
1944     memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1945     memset(s->last_palette, '\0', sizeof(s->last_palette));
1946     memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1947     switch (vga_retrace_method) {
1948     case VGA_RETRACE_DUMB:
1949         break;
1950     case VGA_RETRACE_PRECISE:
1951         memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1952         break;
1953     }
1954 }
1955
1956 static void vga_reset(void *opaque)
1957 {
1958     VGACommonState *s =  opaque;
1959     vga_common_reset(s);
1960 }
1961
1962 #define TEXTMODE_X(x)   ((x) % width)
1963 #define TEXTMODE_Y(x)   ((x) / width)
1964 #define VMEM2CHTYPE(v)  ((v & 0xff0007ff) | \
1965         ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1966 /* relay text rendering to the display driver
1967  * instead of doing a full vga_update_display() */
1968 static void vga_update_text(void *opaque, console_ch_t *chardata)
1969 {
1970     VGACommonState *s =  opaque;
1971     int graphic_mode, i, cursor_offset, cursor_visible;
1972     int cw, cheight, width, height, size, c_min, c_max;
1973     uint32_t *src;
1974     console_ch_t *dst, val;
1975     char msg_buffer[80];
1976     int full_update = 0;
1977
1978     if (!(s->ar_index & 0x20)) {
1979         graphic_mode = GMODE_BLANK;
1980     } else {
1981         graphic_mode = s->gr[6] & 1;
1982     }
1983     if (graphic_mode != s->graphic_mode) {
1984         s->graphic_mode = graphic_mode;
1985         full_update = 1;
1986     }
1987     if (s->last_width == -1) {
1988         s->last_width = 0;
1989         full_update = 1;
1990     }
1991
1992     switch (graphic_mode) {
1993     case GMODE_TEXT:
1994         /* TODO: update palette */
1995         full_update |= update_basic_params(s);
1996
1997         /* total width & height */
1998         cheight = (s->cr[9] & 0x1f) + 1;
1999         cw = 8;
2000         if (!(s->sr[1] & 0x01))
2001             cw = 9;
2002         if (s->sr[1] & 0x08)
2003             cw = 16; /* NOTE: no 18 pixel wide */
2004         width = (s->cr[0x01] + 1);
2005         if (s->cr[0x06] == 100) {
2006             /* ugly hack for CGA 160x100x16 - explain me the logic */
2007             height = 100;
2008         } else {
2009             height = s->cr[0x12] |
2010                 ((s->cr[0x07] & 0x02) << 7) |
2011                 ((s->cr[0x07] & 0x40) << 3);
2012             height = (height + 1) / cheight;
2013         }
2014
2015         size = (height * width);
2016         if (size > CH_ATTR_SIZE) {
2017             if (!full_update)
2018                 return;
2019
2020             snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
2021                      width, height);
2022             break;
2023         }
2024
2025         if (width != s->last_width || height != s->last_height ||
2026             cw != s->last_cw || cheight != s->last_ch) {
2027             s->last_scr_width = width * cw;
2028             s->last_scr_height = height * cheight;
2029             s->ds->surface->width = width;
2030             s->ds->surface->height = height;
2031             dpy_resize(s->ds);
2032             s->last_width = width;
2033             s->last_height = height;
2034             s->last_ch = cheight;
2035             s->last_cw = cw;
2036             full_update = 1;
2037         }
2038
2039         /* Update "hardware" cursor */
2040         cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr;
2041         if (cursor_offset != s->cursor_offset ||
2042             s->cr[0xa] != s->cursor_start ||
2043             s->cr[0xb] != s->cursor_end || full_update) {
2044             cursor_visible = !(s->cr[0xa] & 0x20);
2045             if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
2046                 dpy_cursor(s->ds,
2047                            TEXTMODE_X(cursor_offset),
2048                            TEXTMODE_Y(cursor_offset));
2049             else
2050                 dpy_cursor(s->ds, -1, -1);
2051             s->cursor_offset = cursor_offset;
2052             s->cursor_start = s->cr[0xa];
2053             s->cursor_end = s->cr[0xb];
2054         }
2055
2056         src = (uint32_t *) s->vram_ptr + s->start_addr;
2057         dst = chardata;
2058
2059         if (full_update) {
2060             for (i = 0; i < size; src ++, dst ++, i ++)
2061                 console_write_ch(dst, VMEM2CHTYPE(*src));
2062
2063             dpy_update(s->ds, 0, 0, width, height);
2064         } else {
2065             c_max = 0;
2066
2067             for (i = 0; i < size; src ++, dst ++, i ++) {
2068                 console_write_ch(&val, VMEM2CHTYPE(*src));
2069                 if (*dst != val) {
2070                     *dst = val;
2071                     c_max = i;
2072                     break;
2073                 }
2074             }
2075             c_min = i;
2076             for (; i < size; src ++, dst ++, i ++) {
2077                 console_write_ch(&val, VMEM2CHTYPE(*src));
2078                 if (*dst != val) {
2079                     *dst = val;
2080                     c_max = i;
2081                 }
2082             }
2083
2084             if (c_min <= c_max) {
2085                 i = TEXTMODE_Y(c_min);
2086                 dpy_update(s->ds, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2087             }
2088         }
2089
2090         return;
2091     case GMODE_GRAPH:
2092         if (!full_update)
2093             return;
2094
2095         s->get_resolution(s, &width, &height);
2096         snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2097                  width, height);
2098         break;
2099     case GMODE_BLANK:
2100     default:
2101         if (!full_update)
2102             return;
2103
2104         snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2105         break;
2106     }
2107
2108     /* Display a message */
2109     s->last_width = 60;
2110     s->last_height = height = 3;
2111     dpy_cursor(s->ds, -1, -1);
2112     s->ds->surface->width = s->last_width;
2113     s->ds->surface->height = height;
2114     dpy_resize(s->ds);
2115
2116     for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2117         console_write_ch(dst ++, ' ');
2118
2119     size = strlen(msg_buffer);
2120     width = (s->last_width - size) / 2;
2121     dst = chardata + s->last_width + width;
2122     for (i = 0; i < size; i ++)
2123         console_write_ch(dst ++, 0x00200100 | msg_buffer[i]);
2124
2125     dpy_update(s->ds, 0, 0, s->last_width, height);
2126 }
2127
2128 CPUReadMemoryFunc * const vga_mem_read[3] = {
2129     vga_mem_readb,
2130     vga_mem_readw,
2131     vga_mem_readl,
2132 };
2133
2134 CPUWriteMemoryFunc * const vga_mem_write[3] = {
2135     vga_mem_writeb,
2136     vga_mem_writew,
2137     vga_mem_writel,
2138 };
2139
2140 static int vga_common_post_load(void *opaque, int version_id)
2141 {
2142     VGACommonState *s = opaque;
2143
2144     /* force refresh */
2145     s->graphic_mode = -1;
2146     return 0;
2147 }
2148
2149 const VMStateDescription vmstate_vga_common = {
2150     .name = "vga",
2151     .version_id = 2,
2152     .minimum_version_id = 2,
2153     .minimum_version_id_old = 2,
2154     .post_load = vga_common_post_load,
2155     .fields      = (VMStateField []) {
2156         VMSTATE_UINT32(latch, VGACommonState),
2157         VMSTATE_UINT8(sr_index, VGACommonState),
2158         VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2159         VMSTATE_UINT8(gr_index, VGACommonState),
2160         VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2161         VMSTATE_UINT8(ar_index, VGACommonState),
2162         VMSTATE_BUFFER(ar, VGACommonState),
2163         VMSTATE_INT32(ar_flip_flop, VGACommonState),
2164         VMSTATE_UINT8(cr_index, VGACommonState),
2165         VMSTATE_BUFFER(cr, VGACommonState),
2166         VMSTATE_UINT8(msr, VGACommonState),
2167         VMSTATE_UINT8(fcr, VGACommonState),
2168         VMSTATE_UINT8(st00, VGACommonState),
2169         VMSTATE_UINT8(st01, VGACommonState),
2170
2171         VMSTATE_UINT8(dac_state, VGACommonState),
2172         VMSTATE_UINT8(dac_sub_index, VGACommonState),
2173         VMSTATE_UINT8(dac_read_index, VGACommonState),
2174         VMSTATE_UINT8(dac_write_index, VGACommonState),
2175         VMSTATE_BUFFER(dac_cache, VGACommonState),
2176         VMSTATE_BUFFER(palette, VGACommonState),
2177
2178         VMSTATE_INT32(bank_offset, VGACommonState),
2179         VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2180 #ifdef CONFIG_BOCHS_VBE
2181         VMSTATE_UINT16(vbe_index, VGACommonState),
2182         VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2183         VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2184         VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2185         VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2186 #endif
2187         VMSTATE_END_OF_LIST()
2188     }
2189 };
2190
2191 void vga_common_init(VGACommonState *s, int vga_ram_size)
2192 {
2193     int i, j, v, b;
2194
2195     for(i = 0;i < 256; i++) {
2196         v = 0;
2197         for(j = 0; j < 8; j++) {
2198             v |= ((i >> j) & 1) << (j * 4);
2199         }
2200         expand4[i] = v;
2201
2202         v = 0;
2203         for(j = 0; j < 4; j++) {
2204             v |= ((i >> (2 * j)) & 3) << (j * 4);
2205         }
2206         expand2[i] = v;
2207     }
2208     for(i = 0; i < 16; i++) {
2209         v = 0;
2210         for(j = 0; j < 4; j++) {
2211             b = ((i >> j) & 1);
2212             v |= b << (2 * j);
2213             v |= b << (2 * j + 1);
2214         }
2215         expand4to8[i] = v;
2216     }
2217
2218 #ifdef CONFIG_BOCHS_VBE
2219     s->is_vbe_vmstate = 1;
2220 #else
2221     s->is_vbe_vmstate = 0;
2222 #endif
2223     s->vram_offset = qemu_ram_alloc(vga_ram_size);
2224     s->vram_ptr = qemu_get_ram_ptr(s->vram_offset);
2225     s->vram_size = vga_ram_size;
2226     s->get_bpp = vga_get_bpp;
2227     s->get_offsets = vga_get_offsets;
2228     s->get_resolution = vga_get_resolution;
2229     s->update = vga_update_display;
2230     s->invalidate = vga_invalidate_display;
2231     s->screen_dump = vga_screen_dump;
2232     s->text_update = vga_update_text;
2233     switch (vga_retrace_method) {
2234     case VGA_RETRACE_DUMB:
2235         s->retrace = vga_dumb_retrace;
2236         s->update_retrace_info = vga_dumb_update_retrace_info;
2237         break;
2238
2239     case VGA_RETRACE_PRECISE:
2240         s->retrace = vga_precise_retrace;
2241         s->update_retrace_info = vga_precise_update_retrace_info;
2242         break;
2243     }
2244 }
2245
2246 /* used by both ISA and PCI */
2247 void vga_init(VGACommonState *s)
2248 {
2249     int vga_io_memory;
2250
2251     qemu_register_reset(vga_reset, s);
2252
2253     register_ioport_write(0x3c0, 16, 1, vga_ioport_write, s);
2254
2255     register_ioport_write(0x3b4, 2, 1, vga_ioport_write, s);
2256     register_ioport_write(0x3d4, 2, 1, vga_ioport_write, s);
2257     register_ioport_write(0x3ba, 1, 1, vga_ioport_write, s);
2258     register_ioport_write(0x3da, 1, 1, vga_ioport_write, s);
2259
2260     register_ioport_read(0x3c0, 16, 1, vga_ioport_read, s);
2261
2262     register_ioport_read(0x3b4, 2, 1, vga_ioport_read, s);
2263     register_ioport_read(0x3d4, 2, 1, vga_ioport_read, s);
2264     register_ioport_read(0x3ba, 1, 1, vga_ioport_read, s);
2265     register_ioport_read(0x3da, 1, 1, vga_ioport_read, s);
2266     s->bank_offset = 0;
2267
2268 #ifdef CONFIG_BOCHS_VBE
2269 #if defined (TARGET_I386)
2270     register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
2271     register_ioport_read(0x1cf, 1, 2, vbe_ioport_read_data, s);
2272
2273     register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
2274     register_ioport_write(0x1cf, 1, 2, vbe_ioport_write_data, s);
2275
2276     /* old Bochs IO ports */
2277     register_ioport_read(0xff80, 1, 2, vbe_ioport_read_index, s);
2278     register_ioport_read(0xff81, 1, 2, vbe_ioport_read_data, s);
2279
2280     register_ioport_write(0xff80, 1, 2, vbe_ioport_write_index, s);
2281     register_ioport_write(0xff81, 1, 2, vbe_ioport_write_data, s);
2282 #else
2283     register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
2284     register_ioport_read(0x1d0, 1, 2, vbe_ioport_read_data, s);
2285
2286     register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
2287     register_ioport_write(0x1d0, 1, 2, vbe_ioport_write_data, s);
2288 #endif
2289 #endif /* CONFIG_BOCHS_VBE */
2290
2291     vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s);
2292     cpu_register_physical_memory(isa_mem_base + 0x000a0000, 0x20000,
2293                                  vga_io_memory);
2294     qemu_register_coalesced_mmio(isa_mem_base + 0x000a0000, 0x20000);
2295 }
2296
2297 /********************************************************/
2298 /* vga screen dump */
2299
2300 static void vga_save_dpy_update(DisplayState *ds,
2301                                 int x, int y, int w, int h)
2302 {
2303     if (screen_dump_filename) {
2304         ppm_save(screen_dump_filename, ds->surface);
2305         screen_dump_filename = NULL;
2306     }
2307 }
2308
2309 static void vga_save_dpy_resize(DisplayState *s)
2310 {
2311 }
2312
2313 static void vga_save_dpy_refresh(DisplayState *s)
2314 {
2315 }
2316
2317 int ppm_save(const char *filename, struct DisplaySurface *ds)
2318 {
2319     FILE *f;
2320     uint8_t *d, *d1;
2321     uint32_t v;
2322     int y, x;
2323     uint8_t r, g, b;
2324
2325     f = fopen(filename, "wb");
2326     if (!f)
2327         return -1;
2328     fprintf(f, "P6\n%d %d\n%d\n",
2329             ds->width, ds->height, 255);
2330     d1 = ds->data;
2331     for(y = 0; y < ds->height; y++) {
2332         d = d1;
2333         for(x = 0; x < ds->width; x++) {
2334             if (ds->pf.bits_per_pixel == 32)
2335                 v = *(uint32_t *)d;
2336             else
2337                 v = (uint32_t) (*(uint16_t *)d);
2338             r = ((v >> ds->pf.rshift) & ds->pf.rmax) * 256 /
2339                 (ds->pf.rmax + 1);
2340             g = ((v >> ds->pf.gshift) & ds->pf.gmax) * 256 /
2341                 (ds->pf.gmax + 1);
2342             b = ((v >> ds->pf.bshift) & ds->pf.bmax) * 256 /
2343                 (ds->pf.bmax + 1);
2344             fputc(r, f);
2345             fputc(g, f);
2346             fputc(b, f);
2347             d += ds->pf.bytes_per_pixel;
2348         }
2349         d1 += ds->linesize;
2350     }
2351     fclose(f);
2352     return 0;
2353 }
2354
2355 static DisplayChangeListener* vga_screen_dump_init(DisplayState *ds)
2356 {
2357     DisplayChangeListener *dcl;
2358
2359     dcl = qemu_mallocz(sizeof(DisplayChangeListener));
2360     dcl->dpy_update = vga_save_dpy_update;
2361     dcl->dpy_resize = vga_save_dpy_resize;
2362     dcl->dpy_refresh = vga_save_dpy_refresh;
2363     register_displaychangelistener(ds, dcl);
2364     return dcl;
2365 }
2366
2367 /* save the vga display in a PPM image even if no display is
2368    available */
2369 static void vga_screen_dump(void *opaque, const char *filename)
2370 {
2371     VGACommonState *s = opaque;
2372
2373     if (!screen_dump_dcl)
2374         screen_dump_dcl = vga_screen_dump_init(s->ds);
2375
2376     screen_dump_filename = (char *)filename;
2377     vga_invalidate_display(s);
2378     vga_hw_update();
2379 }
2380