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/hw.h" 25 #include "vga.h" 26 #include "ui/console.h" 27 #include "hw/i386/pc.h" 28 #include "hw/pci/pci.h" 29 #include "vga_int.h" 30 #include "ui/pixel_ops.h" 31 #include "qemu/timer.h" 32 #include "hw/xen/xen.h" 33 #include "trace.h" 34 35 //#define DEBUG_VGA 36 //#define DEBUG_VGA_MEM 37 //#define DEBUG_VGA_REG 38 39 //#define DEBUG_BOCHS_VBE 40 41 /* 16 state changes per vertical frame @60 Hz */ 42 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) 43 44 /* 45 * Video Graphics Array (VGA) 46 * 47 * Chipset docs for original IBM VGA: 48 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf 49 * 50 * FreeVGA site: 51 * http://www.osdever.net/FreeVGA/home.htm 52 * 53 * Standard VGA features and Bochs VBE extensions are implemented. 54 */ 55 56 /* force some bits to zero */ 57 const uint8_t sr_mask[8] = { 58 0x03, 59 0x3d, 60 0x0f, 61 0x3f, 62 0x0e, 63 0x00, 64 0x00, 65 0xff, 66 }; 67 68 const uint8_t gr_mask[16] = { 69 0x0f, /* 0x00 */ 70 0x0f, /* 0x01 */ 71 0x0f, /* 0x02 */ 72 0x1f, /* 0x03 */ 73 0x03, /* 0x04 */ 74 0x7b, /* 0x05 */ 75 0x0f, /* 0x06 */ 76 0x0f, /* 0x07 */ 77 0xff, /* 0x08 */ 78 0x00, /* 0x09 */ 79 0x00, /* 0x0a */ 80 0x00, /* 0x0b */ 81 0x00, /* 0x0c */ 82 0x00, /* 0x0d */ 83 0x00, /* 0x0e */ 84 0x00, /* 0x0f */ 85 }; 86 87 #define cbswap_32(__x) \ 88 ((uint32_t)( \ 89 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ 90 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ 91 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ 92 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )) 93 94 #ifdef HOST_WORDS_BIGENDIAN 95 #define PAT(x) cbswap_32(x) 96 #else 97 #define PAT(x) (x) 98 #endif 99 100 #ifdef HOST_WORDS_BIGENDIAN 101 #define BIG 1 102 #else 103 #define BIG 0 104 #endif 105 106 #ifdef HOST_WORDS_BIGENDIAN 107 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff) 108 #else 109 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff) 110 #endif 111 112 static const uint32_t mask16[16] = { 113 PAT(0x00000000), 114 PAT(0x000000ff), 115 PAT(0x0000ff00), 116 PAT(0x0000ffff), 117 PAT(0x00ff0000), 118 PAT(0x00ff00ff), 119 PAT(0x00ffff00), 120 PAT(0x00ffffff), 121 PAT(0xff000000), 122 PAT(0xff0000ff), 123 PAT(0xff00ff00), 124 PAT(0xff00ffff), 125 PAT(0xffff0000), 126 PAT(0xffff00ff), 127 PAT(0xffffff00), 128 PAT(0xffffffff), 129 }; 130 131 #undef PAT 132 133 #ifdef HOST_WORDS_BIGENDIAN 134 #define PAT(x) (x) 135 #else 136 #define PAT(x) cbswap_32(x) 137 #endif 138 139 static uint32_t expand4[256]; 140 static uint16_t expand2[256]; 141 static uint8_t expand4to8[16]; 142 143 static void vga_update_memory_access(VGACommonState *s) 144 { 145 hwaddr base, offset, size; 146 147 if (s->legacy_address_space == NULL) { 148 return; 149 } 150 151 if (s->has_chain4_alias) { 152 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias); 153 object_unparent(OBJECT(&s->chain4_alias)); 154 s->has_chain4_alias = false; 155 s->plane_updated = 0xf; 156 } 157 if ((s->sr[VGA_SEQ_PLANE_WRITE] & VGA_SR02_ALL_PLANES) == 158 VGA_SR02_ALL_PLANES && s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) { 159 offset = 0; 160 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) { 161 case 0: 162 base = 0xa0000; 163 size = 0x20000; 164 break; 165 case 1: 166 base = 0xa0000; 167 size = 0x10000; 168 offset = s->bank_offset; 169 break; 170 case 2: 171 base = 0xb0000; 172 size = 0x8000; 173 break; 174 case 3: 175 default: 176 base = 0xb8000; 177 size = 0x8000; 178 break; 179 } 180 base += isa_mem_base; 181 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram), 182 "vga.chain4", &s->vram, offset, size); 183 memory_region_add_subregion_overlap(s->legacy_address_space, base, 184 &s->chain4_alias, 2); 185 s->has_chain4_alias = true; 186 } 187 } 188 189 static void vga_dumb_update_retrace_info(VGACommonState *s) 190 { 191 (void) s; 192 } 193 194 static void vga_precise_update_retrace_info(VGACommonState *s) 195 { 196 int htotal_chars; 197 int hretr_start_char; 198 int hretr_skew_chars; 199 int hretr_end_char; 200 201 int vtotal_lines; 202 int vretr_start_line; 203 int vretr_end_line; 204 205 int dots; 206 #if 0 207 int div2, sldiv2; 208 #endif 209 int clocking_mode; 210 int clock_sel; 211 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000}; 212 int64_t chars_per_sec; 213 struct vga_precise_retrace *r = &s->retrace_info.precise; 214 215 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5; 216 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START]; 217 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3; 218 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f; 219 220 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] | 221 (((s->cr[VGA_CRTC_OVERFLOW] & 1) | 222 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2; 223 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] | 224 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) | 225 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8); 226 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf; 227 228 clocking_mode = (s->sr[VGA_SEQ_CLOCK_MODE] >> 3) & 1; 229 clock_sel = (s->msr >> 2) & 3; 230 dots = (s->msr & 1) ? 8 : 9; 231 232 chars_per_sec = clk_hz[clock_sel] / dots; 233 234 htotal_chars <<= clocking_mode; 235 236 r->total_chars = vtotal_lines * htotal_chars; 237 if (r->freq) { 238 r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq); 239 } else { 240 r->ticks_per_char = get_ticks_per_sec() / chars_per_sec; 241 } 242 243 r->vstart = vretr_start_line; 244 r->vend = r->vstart + vretr_end_line + 1; 245 246 r->hstart = hretr_start_char + hretr_skew_chars; 247 r->hend = r->hstart + hretr_end_char + 1; 248 r->htotal = htotal_chars; 249 250 #if 0 251 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1; 252 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1; 253 printf ( 254 "hz=%f\n" 255 "htotal = %d\n" 256 "hretr_start = %d\n" 257 "hretr_skew = %d\n" 258 "hretr_end = %d\n" 259 "vtotal = %d\n" 260 "vretr_start = %d\n" 261 "vretr_end = %d\n" 262 "div2 = %d sldiv2 = %d\n" 263 "clocking_mode = %d\n" 264 "clock_sel = %d %d\n" 265 "dots = %d\n" 266 "ticks/char = %" PRId64 "\n" 267 "\n", 268 (double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars), 269 htotal_chars, 270 hretr_start_char, 271 hretr_skew_chars, 272 hretr_end_char, 273 vtotal_lines, 274 vretr_start_line, 275 vretr_end_line, 276 div2, sldiv2, 277 clocking_mode, 278 clock_sel, 279 clk_hz[clock_sel], 280 dots, 281 r->ticks_per_char 282 ); 283 #endif 284 } 285 286 static uint8_t vga_precise_retrace(VGACommonState *s) 287 { 288 struct vga_precise_retrace *r = &s->retrace_info.precise; 289 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE); 290 291 if (r->total_chars) { 292 int cur_line, cur_line_char, cur_char; 293 int64_t cur_tick; 294 295 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 296 297 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars; 298 cur_line = cur_char / r->htotal; 299 300 if (cur_line >= r->vstart && cur_line <= r->vend) { 301 val |= ST01_V_RETRACE | ST01_DISP_ENABLE; 302 } else { 303 cur_line_char = cur_char % r->htotal; 304 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) { 305 val |= ST01_DISP_ENABLE; 306 } 307 } 308 309 return val; 310 } else { 311 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 312 } 313 } 314 315 static uint8_t vga_dumb_retrace(VGACommonState *s) 316 { 317 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 318 } 319 320 int vga_ioport_invalid(VGACommonState *s, uint32_t addr) 321 { 322 if (s->msr & VGA_MIS_COLOR) { 323 /* Color */ 324 return (addr >= 0x3b0 && addr <= 0x3bf); 325 } else { 326 /* Monochrome */ 327 return (addr >= 0x3d0 && addr <= 0x3df); 328 } 329 } 330 331 uint32_t vga_ioport_read(void *opaque, uint32_t addr) 332 { 333 VGACommonState *s = opaque; 334 int val, index; 335 336 if (vga_ioport_invalid(s, addr)) { 337 val = 0xff; 338 } else { 339 switch(addr) { 340 case VGA_ATT_W: 341 if (s->ar_flip_flop == 0) { 342 val = s->ar_index; 343 } else { 344 val = 0; 345 } 346 break; 347 case VGA_ATT_R: 348 index = s->ar_index & 0x1f; 349 if (index < VGA_ATT_C) { 350 val = s->ar[index]; 351 } else { 352 val = 0; 353 } 354 break; 355 case VGA_MIS_W: 356 val = s->st00; 357 break; 358 case VGA_SEQ_I: 359 val = s->sr_index; 360 break; 361 case VGA_SEQ_D: 362 val = s->sr[s->sr_index]; 363 #ifdef DEBUG_VGA_REG 364 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); 365 #endif 366 break; 367 case VGA_PEL_IR: 368 val = s->dac_state; 369 break; 370 case VGA_PEL_IW: 371 val = s->dac_write_index; 372 break; 373 case VGA_PEL_D: 374 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index]; 375 if (++s->dac_sub_index == 3) { 376 s->dac_sub_index = 0; 377 s->dac_read_index++; 378 } 379 break; 380 case VGA_FTC_R: 381 val = s->fcr; 382 break; 383 case VGA_MIS_R: 384 val = s->msr; 385 break; 386 case VGA_GFX_I: 387 val = s->gr_index; 388 break; 389 case VGA_GFX_D: 390 val = s->gr[s->gr_index]; 391 #ifdef DEBUG_VGA_REG 392 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); 393 #endif 394 break; 395 case VGA_CRT_IM: 396 case VGA_CRT_IC: 397 val = s->cr_index; 398 break; 399 case VGA_CRT_DM: 400 case VGA_CRT_DC: 401 val = s->cr[s->cr_index]; 402 #ifdef DEBUG_VGA_REG 403 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); 404 #endif 405 break; 406 case VGA_IS1_RM: 407 case VGA_IS1_RC: 408 /* just toggle to fool polling */ 409 val = s->st01 = s->retrace(s); 410 s->ar_flip_flop = 0; 411 break; 412 default: 413 val = 0x00; 414 break; 415 } 416 } 417 #if defined(DEBUG_VGA) 418 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val); 419 #endif 420 return val; 421 } 422 423 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val) 424 { 425 VGACommonState *s = opaque; 426 int index; 427 428 /* check port range access depending on color/monochrome mode */ 429 if (vga_ioport_invalid(s, addr)) { 430 return; 431 } 432 #ifdef DEBUG_VGA 433 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val); 434 #endif 435 436 switch(addr) { 437 case VGA_ATT_W: 438 if (s->ar_flip_flop == 0) { 439 val &= 0x3f; 440 s->ar_index = val; 441 } else { 442 index = s->ar_index & 0x1f; 443 switch(index) { 444 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF: 445 s->ar[index] = val & 0x3f; 446 break; 447 case VGA_ATC_MODE: 448 s->ar[index] = val & ~0x10; 449 break; 450 case VGA_ATC_OVERSCAN: 451 s->ar[index] = val; 452 break; 453 case VGA_ATC_PLANE_ENABLE: 454 s->ar[index] = val & ~0xc0; 455 break; 456 case VGA_ATC_PEL: 457 s->ar[index] = val & ~0xf0; 458 break; 459 case VGA_ATC_COLOR_PAGE: 460 s->ar[index] = val & ~0xf0; 461 break; 462 default: 463 break; 464 } 465 } 466 s->ar_flip_flop ^= 1; 467 break; 468 case VGA_MIS_W: 469 s->msr = val & ~0x10; 470 s->update_retrace_info(s); 471 break; 472 case VGA_SEQ_I: 473 s->sr_index = val & 7; 474 break; 475 case VGA_SEQ_D: 476 #ifdef DEBUG_VGA_REG 477 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); 478 #endif 479 s->sr[s->sr_index] = val & sr_mask[s->sr_index]; 480 if (s->sr_index == VGA_SEQ_CLOCK_MODE) { 481 s->update_retrace_info(s); 482 } 483 vga_update_memory_access(s); 484 break; 485 case VGA_PEL_IR: 486 s->dac_read_index = val; 487 s->dac_sub_index = 0; 488 s->dac_state = 3; 489 break; 490 case VGA_PEL_IW: 491 s->dac_write_index = val; 492 s->dac_sub_index = 0; 493 s->dac_state = 0; 494 break; 495 case VGA_PEL_D: 496 s->dac_cache[s->dac_sub_index] = val; 497 if (++s->dac_sub_index == 3) { 498 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); 499 s->dac_sub_index = 0; 500 s->dac_write_index++; 501 } 502 break; 503 case VGA_GFX_I: 504 s->gr_index = val & 0x0f; 505 break; 506 case VGA_GFX_D: 507 #ifdef DEBUG_VGA_REG 508 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); 509 #endif 510 s->gr[s->gr_index] = val & gr_mask[s->gr_index]; 511 vga_update_memory_access(s); 512 break; 513 case VGA_CRT_IM: 514 case VGA_CRT_IC: 515 s->cr_index = val; 516 break; 517 case VGA_CRT_DM: 518 case VGA_CRT_DC: 519 #ifdef DEBUG_VGA_REG 520 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); 521 #endif 522 /* handle CR0-7 protection */ 523 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) && 524 s->cr_index <= VGA_CRTC_OVERFLOW) { 525 /* can always write bit 4 of CR7 */ 526 if (s->cr_index == VGA_CRTC_OVERFLOW) { 527 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | 528 (val & 0x10); 529 } 530 return; 531 } 532 s->cr[s->cr_index] = val; 533 534 switch(s->cr_index) { 535 case VGA_CRTC_H_TOTAL: 536 case VGA_CRTC_H_SYNC_START: 537 case VGA_CRTC_H_SYNC_END: 538 case VGA_CRTC_V_TOTAL: 539 case VGA_CRTC_OVERFLOW: 540 case VGA_CRTC_V_SYNC_END: 541 case VGA_CRTC_MODE: 542 s->update_retrace_info(s); 543 break; 544 } 545 break; 546 case VGA_IS1_RM: 547 case VGA_IS1_RC: 548 s->fcr = val & 0x10; 549 break; 550 } 551 } 552 553 /* 554 * Sanity check vbe register writes. 555 * 556 * As we don't have a way to signal errors to the guest in the bochs 557 * dispi interface we'll go adjust the registers to the closest valid 558 * value. 559 */ 560 static void vbe_fixup_regs(VGACommonState *s) 561 { 562 uint16_t *r = s->vbe_regs; 563 uint32_t bits, linelength, maxy, offset; 564 565 if (!(r[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) { 566 /* vbe is turned off -- nothing to do */ 567 return; 568 } 569 570 /* check depth */ 571 switch (r[VBE_DISPI_INDEX_BPP]) { 572 case 4: 573 case 8: 574 case 16: 575 case 24: 576 case 32: 577 bits = r[VBE_DISPI_INDEX_BPP]; 578 break; 579 case 15: 580 bits = 16; 581 break; 582 default: 583 bits = r[VBE_DISPI_INDEX_BPP] = 8; 584 break; 585 } 586 587 /* check width */ 588 r[VBE_DISPI_INDEX_XRES] &= ~7u; 589 if (r[VBE_DISPI_INDEX_XRES] == 0) { 590 r[VBE_DISPI_INDEX_XRES] = 8; 591 } 592 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) { 593 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES; 594 } 595 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u; 596 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) { 597 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES; 598 } 599 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) { 600 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES]; 601 } 602 603 /* check height */ 604 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8; 605 maxy = s->vbe_size / linelength; 606 if (r[VBE_DISPI_INDEX_YRES] == 0) { 607 r[VBE_DISPI_INDEX_YRES] = 1; 608 } 609 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) { 610 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES; 611 } 612 if (r[VBE_DISPI_INDEX_YRES] > maxy) { 613 r[VBE_DISPI_INDEX_YRES] = maxy; 614 } 615 616 /* check offset */ 617 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) { 618 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES; 619 } 620 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) { 621 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES; 622 } 623 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 624 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength; 625 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 626 r[VBE_DISPI_INDEX_Y_OFFSET] = 0; 627 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 628 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 629 r[VBE_DISPI_INDEX_X_OFFSET] = 0; 630 offset = 0; 631 } 632 } 633 634 /* update vga state */ 635 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy; 636 s->vbe_line_offset = linelength; 637 s->vbe_start_addr = offset / 4; 638 } 639 640 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr) 641 { 642 VGACommonState *s = opaque; 643 uint32_t val; 644 val = s->vbe_index; 645 return val; 646 } 647 648 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr) 649 { 650 VGACommonState *s = opaque; 651 uint32_t val; 652 653 if (s->vbe_index < VBE_DISPI_INDEX_NB) { 654 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) { 655 switch(s->vbe_index) { 656 /* XXX: do not hardcode ? */ 657 case VBE_DISPI_INDEX_XRES: 658 val = VBE_DISPI_MAX_XRES; 659 break; 660 case VBE_DISPI_INDEX_YRES: 661 val = VBE_DISPI_MAX_YRES; 662 break; 663 case VBE_DISPI_INDEX_BPP: 664 val = VBE_DISPI_MAX_BPP; 665 break; 666 default: 667 val = s->vbe_regs[s->vbe_index]; 668 break; 669 } 670 } else { 671 val = s->vbe_regs[s->vbe_index]; 672 } 673 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) { 674 val = s->vbe_size / (64 * 1024); 675 } else { 676 val = 0; 677 } 678 #ifdef DEBUG_BOCHS_VBE 679 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val); 680 #endif 681 return val; 682 } 683 684 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val) 685 { 686 VGACommonState *s = opaque; 687 s->vbe_index = val; 688 } 689 690 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val) 691 { 692 VGACommonState *s = opaque; 693 694 if (s->vbe_index <= VBE_DISPI_INDEX_NB) { 695 #ifdef DEBUG_BOCHS_VBE 696 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val); 697 #endif 698 switch(s->vbe_index) { 699 case VBE_DISPI_INDEX_ID: 700 if (val == VBE_DISPI_ID0 || 701 val == VBE_DISPI_ID1 || 702 val == VBE_DISPI_ID2 || 703 val == VBE_DISPI_ID3 || 704 val == VBE_DISPI_ID4) { 705 s->vbe_regs[s->vbe_index] = val; 706 } 707 break; 708 case VBE_DISPI_INDEX_XRES: 709 case VBE_DISPI_INDEX_YRES: 710 case VBE_DISPI_INDEX_BPP: 711 case VBE_DISPI_INDEX_VIRT_WIDTH: 712 case VBE_DISPI_INDEX_X_OFFSET: 713 case VBE_DISPI_INDEX_Y_OFFSET: 714 s->vbe_regs[s->vbe_index] = val; 715 vbe_fixup_regs(s); 716 break; 717 case VBE_DISPI_INDEX_BANK: 718 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) { 719 val &= (s->vbe_bank_mask >> 2); 720 } else { 721 val &= s->vbe_bank_mask; 722 } 723 s->vbe_regs[s->vbe_index] = val; 724 s->bank_offset = (val << 16); 725 vga_update_memory_access(s); 726 break; 727 case VBE_DISPI_INDEX_ENABLE: 728 if ((val & VBE_DISPI_ENABLED) && 729 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) { 730 int h, shift_control; 731 732 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0; 733 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0; 734 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0; 735 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED; 736 vbe_fixup_regs(s); 737 738 /* clear the screen */ 739 if (!(val & VBE_DISPI_NOCLEARMEM)) { 740 memset(s->vram_ptr, 0, 741 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset); 742 } 743 744 /* we initialize the VGA graphic mode */ 745 /* graphic mode + memory map 1 */ 746 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 | 747 VGA_GR06_GRAPHICS_MODE; 748 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */ 749 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3; 750 /* width */ 751 s->cr[VGA_CRTC_H_DISP] = 752 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1; 753 /* height (only meaningful if < 1024) */ 754 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1; 755 s->cr[VGA_CRTC_V_DISP_END] = h; 756 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) | 757 ((h >> 7) & 0x02) | ((h >> 3) & 0x40); 758 /* line compare to 1023 */ 759 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff; 760 s->cr[VGA_CRTC_OVERFLOW] |= 0x10; 761 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40; 762 763 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) { 764 shift_control = 0; 765 s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */ 766 } else { 767 shift_control = 2; 768 /* set chain 4 mode */ 769 s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M; 770 /* activate all planes */ 771 s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES; 772 } 773 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) | 774 (shift_control << 5); 775 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */ 776 } else { 777 s->bank_offset = 0; 778 } 779 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0; 780 s->vbe_regs[s->vbe_index] = val; 781 vga_update_memory_access(s); 782 break; 783 default: 784 break; 785 } 786 } 787 } 788 789 /* called for accesses between 0xa0000 and 0xc0000 */ 790 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr) 791 { 792 int memory_map_mode, plane; 793 uint32_t ret; 794 795 /* convert to VGA memory offset */ 796 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 797 addr &= 0x1ffff; 798 switch(memory_map_mode) { 799 case 0: 800 break; 801 case 1: 802 if (addr >= 0x10000) 803 return 0xff; 804 addr += s->bank_offset; 805 break; 806 case 2: 807 addr -= 0x10000; 808 if (addr >= 0x8000) 809 return 0xff; 810 break; 811 default: 812 case 3: 813 addr -= 0x18000; 814 if (addr >= 0x8000) 815 return 0xff; 816 break; 817 } 818 819 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) { 820 /* chain 4 mode : simplest access */ 821 ret = s->vram_ptr[addr]; 822 } else if (s->gr[VGA_GFX_MODE] & 0x10) { 823 /* odd/even mode (aka text mode mapping) */ 824 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); 825 ret = s->vram_ptr[((addr & ~1) << 1) | plane]; 826 } else { 827 /* standard VGA latched access */ 828 s->latch = ((uint32_t *)s->vram_ptr)[addr]; 829 830 if (!(s->gr[VGA_GFX_MODE] & 0x08)) { 831 /* read mode 0 */ 832 plane = s->gr[VGA_GFX_PLANE_READ]; 833 ret = GET_PLANE(s->latch, plane); 834 } else { 835 /* read mode 1 */ 836 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) & 837 mask16[s->gr[VGA_GFX_COMPARE_MASK]]; 838 ret |= ret >> 16; 839 ret |= ret >> 8; 840 ret = (~ret) & 0xff; 841 } 842 } 843 return ret; 844 } 845 846 /* called for accesses between 0xa0000 and 0xc0000 */ 847 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val) 848 { 849 int memory_map_mode, plane, write_mode, b, func_select, mask; 850 uint32_t write_mask, bit_mask, set_mask; 851 852 #ifdef DEBUG_VGA_MEM 853 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val); 854 #endif 855 /* convert to VGA memory offset */ 856 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 857 addr &= 0x1ffff; 858 switch(memory_map_mode) { 859 case 0: 860 break; 861 case 1: 862 if (addr >= 0x10000) 863 return; 864 addr += s->bank_offset; 865 break; 866 case 2: 867 addr -= 0x10000; 868 if (addr >= 0x8000) 869 return; 870 break; 871 default: 872 case 3: 873 addr -= 0x18000; 874 if (addr >= 0x8000) 875 return; 876 break; 877 } 878 879 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) { 880 /* chain 4 mode : simplest access */ 881 plane = addr & 3; 882 mask = (1 << plane); 883 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) { 884 s->vram_ptr[addr] = val; 885 #ifdef DEBUG_VGA_MEM 886 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr); 887 #endif 888 s->plane_updated |= mask; /* only used to detect font change */ 889 memory_region_set_dirty(&s->vram, addr, 1); 890 } 891 } else if (s->gr[VGA_GFX_MODE] & 0x10) { 892 /* odd/even mode (aka text mode mapping) */ 893 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); 894 mask = (1 << plane); 895 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) { 896 addr = ((addr & ~1) << 1) | plane; 897 s->vram_ptr[addr] = val; 898 #ifdef DEBUG_VGA_MEM 899 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr); 900 #endif 901 s->plane_updated |= mask; /* only used to detect font change */ 902 memory_region_set_dirty(&s->vram, addr, 1); 903 } 904 } else { 905 /* standard VGA latched access */ 906 write_mode = s->gr[VGA_GFX_MODE] & 3; 907 switch(write_mode) { 908 default: 909 case 0: 910 /* rotate */ 911 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 912 val = ((val >> b) | (val << (8 - b))) & 0xff; 913 val |= val << 8; 914 val |= val << 16; 915 916 /* apply set/reset mask */ 917 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]]; 918 val = (val & ~set_mask) | 919 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask); 920 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 921 break; 922 case 1: 923 val = s->latch; 924 goto do_write; 925 case 2: 926 val = mask16[val & 0x0f]; 927 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 928 break; 929 case 3: 930 /* rotate */ 931 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 932 val = (val >> b) | (val << (8 - b)); 933 934 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val; 935 val = mask16[s->gr[VGA_GFX_SR_VALUE]]; 936 break; 937 } 938 939 /* apply logical operation */ 940 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3; 941 switch(func_select) { 942 case 0: 943 default: 944 /* nothing to do */ 945 break; 946 case 1: 947 /* and */ 948 val &= s->latch; 949 break; 950 case 2: 951 /* or */ 952 val |= s->latch; 953 break; 954 case 3: 955 /* xor */ 956 val ^= s->latch; 957 break; 958 } 959 960 /* apply bit mask */ 961 bit_mask |= bit_mask << 8; 962 bit_mask |= bit_mask << 16; 963 val = (val & bit_mask) | (s->latch & ~bit_mask); 964 965 do_write: 966 /* mask data according to sr[2] */ 967 mask = s->sr[VGA_SEQ_PLANE_WRITE]; 968 s->plane_updated |= mask; /* only used to detect font change */ 969 write_mask = mask16[mask]; 970 ((uint32_t *)s->vram_ptr)[addr] = 971 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | 972 (val & write_mask); 973 #ifdef DEBUG_VGA_MEM 974 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n", 975 addr * 4, write_mask, val); 976 #endif 977 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t)); 978 } 979 } 980 981 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d, 982 const uint8_t *s, int width); 983 984 #include "vga-helpers.h" 985 986 /* return true if the palette was modified */ 987 static int update_palette16(VGACommonState *s) 988 { 989 int full_update, i; 990 uint32_t v, col, *palette; 991 992 full_update = 0; 993 palette = s->last_palette; 994 for(i = 0; i < 16; i++) { 995 v = s->ar[i]; 996 if (s->ar[VGA_ATC_MODE] & 0x80) { 997 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf); 998 } else { 999 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f); 1000 } 1001 v = v * 3; 1002 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1003 c6_to_8(s->palette[v + 1]), 1004 c6_to_8(s->palette[v + 2])); 1005 if (col != palette[i]) { 1006 full_update = 1; 1007 palette[i] = col; 1008 } 1009 } 1010 return full_update; 1011 } 1012 1013 /* return true if the palette was modified */ 1014 static int update_palette256(VGACommonState *s) 1015 { 1016 int full_update, i; 1017 uint32_t v, col, *palette; 1018 1019 full_update = 0; 1020 palette = s->last_palette; 1021 v = 0; 1022 for(i = 0; i < 256; i++) { 1023 if (s->dac_8bit) { 1024 col = rgb_to_pixel32(s->palette[v], 1025 s->palette[v + 1], 1026 s->palette[v + 2]); 1027 } else { 1028 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1029 c6_to_8(s->palette[v + 1]), 1030 c6_to_8(s->palette[v + 2])); 1031 } 1032 if (col != palette[i]) { 1033 full_update = 1; 1034 palette[i] = col; 1035 } 1036 v += 3; 1037 } 1038 return full_update; 1039 } 1040 1041 static void vga_get_offsets(VGACommonState *s, 1042 uint32_t *pline_offset, 1043 uint32_t *pstart_addr, 1044 uint32_t *pline_compare) 1045 { 1046 uint32_t start_addr, line_offset, line_compare; 1047 1048 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) { 1049 line_offset = s->vbe_line_offset; 1050 start_addr = s->vbe_start_addr; 1051 line_compare = 65535; 1052 } else { 1053 /* compute line_offset in bytes */ 1054 line_offset = s->cr[VGA_CRTC_OFFSET]; 1055 line_offset <<= 3; 1056 1057 /* starting address */ 1058 start_addr = s->cr[VGA_CRTC_START_LO] | 1059 (s->cr[VGA_CRTC_START_HI] << 8); 1060 1061 /* line compare */ 1062 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] | 1063 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) | 1064 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3); 1065 } 1066 *pline_offset = line_offset; 1067 *pstart_addr = start_addr; 1068 *pline_compare = line_compare; 1069 } 1070 1071 /* update start_addr and line_offset. Return TRUE if modified */ 1072 static int update_basic_params(VGACommonState *s) 1073 { 1074 int full_update; 1075 uint32_t start_addr, line_offset, line_compare; 1076 1077 full_update = 0; 1078 1079 s->get_offsets(s, &line_offset, &start_addr, &line_compare); 1080 1081 if (line_offset != s->line_offset || 1082 start_addr != s->start_addr || 1083 line_compare != s->line_compare) { 1084 s->line_offset = line_offset; 1085 s->start_addr = start_addr; 1086 s->line_compare = line_compare; 1087 full_update = 1; 1088 } 1089 return full_update; 1090 } 1091 1092 1093 static const uint8_t cursor_glyph[32 * 4] = { 1094 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1095 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1096 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1097 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1098 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1099 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1106 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1110 }; 1111 1112 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight, 1113 int *pcwidth, int *pcheight) 1114 { 1115 int width, cwidth, height, cheight; 1116 1117 /* total width & height */ 1118 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1119 cwidth = 8; 1120 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) { 1121 cwidth = 9; 1122 } 1123 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) { 1124 cwidth = 16; /* NOTE: no 18 pixel wide */ 1125 } 1126 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1127 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1128 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1129 height = 100; 1130 } else { 1131 height = s->cr[VGA_CRTC_V_DISP_END] | 1132 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1133 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1134 height = (height + 1) / cheight; 1135 } 1136 1137 *pwidth = width; 1138 *pheight = height; 1139 *pcwidth = cwidth; 1140 *pcheight = cheight; 1141 } 1142 1143 /* 1144 * Text mode update 1145 * Missing: 1146 * - double scan 1147 * - double width 1148 * - underline 1149 * - flashing 1150 */ 1151 static void vga_draw_text(VGACommonState *s, int full_update) 1152 { 1153 DisplaySurface *surface = qemu_console_surface(s->con); 1154 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr; 1155 int cx_min, cx_max, linesize, x_incr, line, line1; 1156 uint32_t offset, fgcol, bgcol, v, cursor_offset; 1157 uint8_t *d1, *d, *src, *dest, *cursor_ptr; 1158 const uint8_t *font_ptr, *font_base[2]; 1159 int dup9, line_offset; 1160 uint32_t *palette; 1161 uint32_t *ch_attr_ptr; 1162 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1163 1164 /* compute font data address (in plane 2) */ 1165 v = s->sr[VGA_SEQ_CHARACTER_MAP]; 1166 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; 1167 if (offset != s->font_offsets[0]) { 1168 s->font_offsets[0] = offset; 1169 full_update = 1; 1170 } 1171 font_base[0] = s->vram_ptr + offset; 1172 1173 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; 1174 font_base[1] = s->vram_ptr + offset; 1175 if (offset != s->font_offsets[1]) { 1176 s->font_offsets[1] = offset; 1177 full_update = 1; 1178 } 1179 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) { 1180 /* if the plane 2 was modified since the last display, it 1181 indicates the font may have been modified */ 1182 s->plane_updated = 0; 1183 full_update = 1; 1184 } 1185 full_update |= update_basic_params(s); 1186 1187 line_offset = s->line_offset; 1188 1189 vga_get_text_resolution(s, &width, &height, &cw, &cheight); 1190 if ((height * width) <= 1) { 1191 /* better than nothing: exit if transient size is too small */ 1192 return; 1193 } 1194 if ((height * width) > CH_ATTR_SIZE) { 1195 /* better than nothing: exit if transient size is too big */ 1196 return; 1197 } 1198 1199 if (width != s->last_width || height != s->last_height || 1200 cw != s->last_cw || cheight != s->last_ch || s->last_depth) { 1201 s->last_scr_width = width * cw; 1202 s->last_scr_height = height * cheight; 1203 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1204 surface = qemu_console_surface(s->con); 1205 dpy_text_resize(s->con, width, height); 1206 s->last_depth = 0; 1207 s->last_width = width; 1208 s->last_height = height; 1209 s->last_ch = cheight; 1210 s->last_cw = cw; 1211 full_update = 1; 1212 } 1213 full_update |= update_palette16(s); 1214 palette = s->last_palette; 1215 x_incr = cw * surface_bytes_per_pixel(surface); 1216 1217 if (full_update) { 1218 s->full_update_text = 1; 1219 } 1220 if (s->full_update_gfx) { 1221 s->full_update_gfx = 0; 1222 full_update |= 1; 1223 } 1224 1225 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1226 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; 1227 if (cursor_offset != s->cursor_offset || 1228 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1229 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) { 1230 /* if the cursor position changed, we update the old and new 1231 chars */ 1232 if (s->cursor_offset < CH_ATTR_SIZE) 1233 s->last_ch_attr[s->cursor_offset] = -1; 1234 if (cursor_offset < CH_ATTR_SIZE) 1235 s->last_ch_attr[cursor_offset] = -1; 1236 s->cursor_offset = cursor_offset; 1237 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1238 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1239 } 1240 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4; 1241 if (now >= s->cursor_blink_time) { 1242 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2; 1243 s->cursor_visible_phase = !s->cursor_visible_phase; 1244 } 1245 1246 dest = surface_data(surface); 1247 linesize = surface_stride(surface); 1248 ch_attr_ptr = s->last_ch_attr; 1249 line = 0; 1250 offset = s->start_addr * 4; 1251 for(cy = 0; cy < height; cy++) { 1252 d1 = dest; 1253 src = s->vram_ptr + offset; 1254 cx_min = width; 1255 cx_max = -1; 1256 for(cx = 0; cx < width; cx++) { 1257 ch_attr = *(uint16_t *)src; 1258 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) { 1259 if (cx < cx_min) 1260 cx_min = cx; 1261 if (cx > cx_max) 1262 cx_max = cx; 1263 *ch_attr_ptr = ch_attr; 1264 #ifdef HOST_WORDS_BIGENDIAN 1265 ch = ch_attr >> 8; 1266 cattr = ch_attr & 0xff; 1267 #else 1268 ch = ch_attr & 0xff; 1269 cattr = ch_attr >> 8; 1270 #endif 1271 font_ptr = font_base[(cattr >> 3) & 1]; 1272 font_ptr += 32 * 4 * ch; 1273 bgcol = palette[cattr >> 4]; 1274 fgcol = palette[cattr & 0x0f]; 1275 if (cw == 16) { 1276 vga_draw_glyph16(d1, linesize, 1277 font_ptr, cheight, fgcol, bgcol); 1278 } else if (cw != 9) { 1279 vga_draw_glyph8(d1, linesize, 1280 font_ptr, cheight, fgcol, bgcol); 1281 } else { 1282 dup9 = 0; 1283 if (ch >= 0xb0 && ch <= 0xdf && 1284 (s->ar[VGA_ATC_MODE] & 0x04)) { 1285 dup9 = 1; 1286 } 1287 vga_draw_glyph9(d1, linesize, 1288 font_ptr, cheight, fgcol, bgcol, dup9); 1289 } 1290 if (src == cursor_ptr && 1291 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) && 1292 s->cursor_visible_phase) { 1293 int line_start, line_last, h; 1294 /* draw the cursor */ 1295 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f; 1296 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f; 1297 /* XXX: check that */ 1298 if (line_last > cheight - 1) 1299 line_last = cheight - 1; 1300 if (line_last >= line_start && line_start < cheight) { 1301 h = line_last - line_start + 1; 1302 d = d1 + linesize * line_start; 1303 if (cw == 16) { 1304 vga_draw_glyph16(d, linesize, 1305 cursor_glyph, h, fgcol, bgcol); 1306 } else if (cw != 9) { 1307 vga_draw_glyph8(d, linesize, 1308 cursor_glyph, h, fgcol, bgcol); 1309 } else { 1310 vga_draw_glyph9(d, linesize, 1311 cursor_glyph, h, fgcol, bgcol, 1); 1312 } 1313 } 1314 } 1315 } 1316 d1 += x_incr; 1317 src += 4; 1318 ch_attr_ptr++; 1319 } 1320 if (cx_max != -1) { 1321 dpy_gfx_update(s->con, cx_min * cw, cy * cheight, 1322 (cx_max - cx_min + 1) * cw, cheight); 1323 } 1324 dest += linesize * cheight; 1325 line1 = line + cheight; 1326 offset += line_offset; 1327 if (line < s->line_compare && line1 >= s->line_compare) { 1328 offset = 0; 1329 } 1330 line = line1; 1331 } 1332 } 1333 1334 enum { 1335 VGA_DRAW_LINE2, 1336 VGA_DRAW_LINE2D2, 1337 VGA_DRAW_LINE4, 1338 VGA_DRAW_LINE4D2, 1339 VGA_DRAW_LINE8D2, 1340 VGA_DRAW_LINE8, 1341 VGA_DRAW_LINE15_LE, 1342 VGA_DRAW_LINE16_LE, 1343 VGA_DRAW_LINE24_LE, 1344 VGA_DRAW_LINE32_LE, 1345 VGA_DRAW_LINE15_BE, 1346 VGA_DRAW_LINE16_BE, 1347 VGA_DRAW_LINE24_BE, 1348 VGA_DRAW_LINE32_BE, 1349 VGA_DRAW_LINE_NB, 1350 }; 1351 1352 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = { 1353 vga_draw_line2, 1354 vga_draw_line2d2, 1355 vga_draw_line4, 1356 vga_draw_line4d2, 1357 vga_draw_line8d2, 1358 vga_draw_line8, 1359 vga_draw_line15_le, 1360 vga_draw_line16_le, 1361 vga_draw_line24_le, 1362 vga_draw_line32_le, 1363 vga_draw_line15_be, 1364 vga_draw_line16_be, 1365 vga_draw_line24_be, 1366 vga_draw_line32_be, 1367 }; 1368 1369 static int vga_get_bpp(VGACommonState *s) 1370 { 1371 int ret; 1372 1373 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) { 1374 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP]; 1375 } else { 1376 ret = 0; 1377 } 1378 return ret; 1379 } 1380 1381 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight) 1382 { 1383 int width, height; 1384 1385 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) { 1386 width = s->vbe_regs[VBE_DISPI_INDEX_XRES]; 1387 height = s->vbe_regs[VBE_DISPI_INDEX_YRES]; 1388 } else { 1389 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8; 1390 height = s->cr[VGA_CRTC_V_DISP_END] | 1391 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1392 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1393 height = (height + 1); 1394 } 1395 *pwidth = width; 1396 *pheight = height; 1397 } 1398 1399 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2) 1400 { 1401 int y; 1402 if (y1 >= VGA_MAX_HEIGHT) 1403 return; 1404 if (y2 >= VGA_MAX_HEIGHT) 1405 y2 = VGA_MAX_HEIGHT; 1406 for(y = y1; y < y2; y++) { 1407 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f); 1408 } 1409 } 1410 1411 void vga_sync_dirty_bitmap(VGACommonState *s) 1412 { 1413 memory_region_sync_dirty_bitmap(&s->vram); 1414 } 1415 1416 void vga_dirty_log_start(VGACommonState *s) 1417 { 1418 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA); 1419 } 1420 1421 void vga_dirty_log_stop(VGACommonState *s) 1422 { 1423 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA); 1424 } 1425 1426 /* 1427 * graphic modes 1428 */ 1429 static void vga_draw_graphic(VGACommonState *s, int full_update) 1430 { 1431 DisplaySurface *surface = qemu_console_surface(s->con); 1432 int y1, y, update, linesize, y_start, double_scan, mask, depth; 1433 int width, height, shift_control, line_offset, bwidth, bits; 1434 ram_addr_t page0, page1, page_min, page_max; 1435 int disp_width, multi_scan, multi_run; 1436 uint8_t *d; 1437 uint32_t v, addr1, addr; 1438 vga_draw_line_func *vga_draw_line = NULL; 1439 bool share_surface; 1440 pixman_format_code_t format; 1441 #ifdef HOST_WORDS_BIGENDIAN 1442 bool byteswap = !s->big_endian_fb; 1443 #else 1444 bool byteswap = s->big_endian_fb; 1445 #endif 1446 1447 full_update |= update_basic_params(s); 1448 1449 if (!full_update) 1450 vga_sync_dirty_bitmap(s); 1451 1452 s->get_resolution(s, &width, &height); 1453 disp_width = width; 1454 1455 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3; 1456 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7); 1457 if (shift_control != 1) { 1458 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan) 1459 - 1; 1460 } else { 1461 /* in CGA modes, multi_scan is ignored */ 1462 /* XXX: is it correct ? */ 1463 multi_scan = double_scan; 1464 } 1465 multi_run = multi_scan; 1466 if (shift_control != s->shift_control || 1467 double_scan != s->double_scan) { 1468 full_update = 1; 1469 s->shift_control = shift_control; 1470 s->double_scan = double_scan; 1471 } 1472 1473 if (shift_control == 0) { 1474 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) { 1475 disp_width <<= 1; 1476 } 1477 } else if (shift_control == 1) { 1478 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) { 1479 disp_width <<= 1; 1480 } 1481 } 1482 1483 depth = s->get_bpp(s); 1484 1485 /* 1486 * Check whether we can share the surface with the backend 1487 * or whether we need a shadow surface. We share native 1488 * endian surfaces for 15bpp and above and byteswapped 1489 * surfaces for 24bpp and above. 1490 */ 1491 format = qemu_default_pixman_format(depth, !byteswap); 1492 if (format) { 1493 share_surface = dpy_gfx_check_format(s->con, format) 1494 && !s->force_shadow; 1495 } else { 1496 share_surface = false; 1497 } 1498 if (s->line_offset != s->last_line_offset || 1499 disp_width != s->last_width || 1500 height != s->last_height || 1501 s->last_depth != depth || 1502 s->last_byteswap != byteswap || 1503 share_surface != is_buffer_shared(surface)) { 1504 if (share_surface) { 1505 surface = qemu_create_displaysurface_from(disp_width, 1506 height, format, s->line_offset, 1507 s->vram_ptr + (s->start_addr * 4)); 1508 dpy_gfx_replace_surface(s->con, surface); 1509 #ifdef DEBUG_VGA 1510 printf("VGA: Using shared surface for depth=%d swap=%d\n", 1511 depth, byteswap); 1512 #endif 1513 } else { 1514 qemu_console_resize(s->con, disp_width, height); 1515 surface = qemu_console_surface(s->con); 1516 #ifdef DEBUG_VGA 1517 printf("VGA: Using shadow surface for depth=%d swap=%d\n", 1518 depth, byteswap); 1519 #endif 1520 } 1521 s->last_scr_width = disp_width; 1522 s->last_scr_height = height; 1523 s->last_width = disp_width; 1524 s->last_height = height; 1525 s->last_line_offset = s->line_offset; 1526 s->last_depth = depth; 1527 s->last_byteswap = byteswap; 1528 full_update = 1; 1529 } else if (is_buffer_shared(surface) && 1530 (full_update || surface_data(surface) != s->vram_ptr 1531 + (s->start_addr * 4))) { 1532 pixman_format_code_t format = 1533 qemu_default_pixman_format(depth, !byteswap); 1534 surface = qemu_create_displaysurface_from(disp_width, 1535 height, format, s->line_offset, 1536 s->vram_ptr + (s->start_addr * 4)); 1537 dpy_gfx_replace_surface(s->con, surface); 1538 } 1539 1540 if (shift_control == 0) { 1541 full_update |= update_palette16(s); 1542 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) { 1543 v = VGA_DRAW_LINE4D2; 1544 } else { 1545 v = VGA_DRAW_LINE4; 1546 } 1547 bits = 4; 1548 } else if (shift_control == 1) { 1549 full_update |= update_palette16(s); 1550 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) { 1551 v = VGA_DRAW_LINE2D2; 1552 } else { 1553 v = VGA_DRAW_LINE2; 1554 } 1555 bits = 4; 1556 } else { 1557 switch(s->get_bpp(s)) { 1558 default: 1559 case 0: 1560 full_update |= update_palette256(s); 1561 v = VGA_DRAW_LINE8D2; 1562 bits = 4; 1563 break; 1564 case 8: 1565 full_update |= update_palette256(s); 1566 v = VGA_DRAW_LINE8; 1567 bits = 8; 1568 break; 1569 case 15: 1570 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE; 1571 bits = 16; 1572 break; 1573 case 16: 1574 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE; 1575 bits = 16; 1576 break; 1577 case 24: 1578 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE; 1579 bits = 24; 1580 break; 1581 case 32: 1582 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE; 1583 bits = 32; 1584 break; 1585 } 1586 } 1587 vga_draw_line = vga_draw_line_table[v]; 1588 1589 if (!is_buffer_shared(surface) && s->cursor_invalidate) { 1590 s->cursor_invalidate(s); 1591 } 1592 1593 line_offset = s->line_offset; 1594 #if 0 1595 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", 1596 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE], 1597 s->line_compare, s->sr[VGA_SEQ_CLOCK_MODE]); 1598 #endif 1599 addr1 = (s->start_addr * 4); 1600 bwidth = (width * bits + 7) / 8; 1601 y_start = -1; 1602 page_min = -1; 1603 page_max = 0; 1604 d = surface_data(surface); 1605 linesize = surface_stride(surface); 1606 y1 = 0; 1607 for(y = 0; y < height; y++) { 1608 addr = addr1; 1609 if (!(s->cr[VGA_CRTC_MODE] & 1)) { 1610 int shift; 1611 /* CGA compatibility handling */ 1612 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1); 1613 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); 1614 } 1615 if (!(s->cr[VGA_CRTC_MODE] & 2)) { 1616 addr = (addr & ~0x8000) | ((y1 & 2) << 14); 1617 } 1618 update = full_update; 1619 page0 = addr; 1620 page1 = addr + bwidth - 1; 1621 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0, 1622 DIRTY_MEMORY_VGA); 1623 /* explicit invalidation for the hardware cursor */ 1624 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1; 1625 if (update) { 1626 if (y_start < 0) 1627 y_start = y; 1628 if (page0 < page_min) 1629 page_min = page0; 1630 if (page1 > page_max) 1631 page_max = page1; 1632 if (!(is_buffer_shared(surface))) { 1633 vga_draw_line(s, d, s->vram_ptr + addr, width); 1634 if (s->cursor_draw_line) 1635 s->cursor_draw_line(s, d, y); 1636 } 1637 } else { 1638 if (y_start >= 0) { 1639 /* flush to display */ 1640 dpy_gfx_update(s->con, 0, y_start, 1641 disp_width, y - y_start); 1642 y_start = -1; 1643 } 1644 } 1645 if (!multi_run) { 1646 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3; 1647 if ((y1 & mask) == mask) 1648 addr1 += line_offset; 1649 y1++; 1650 multi_run = multi_scan; 1651 } else { 1652 multi_run--; 1653 } 1654 /* line compare acts on the displayed lines */ 1655 if (y == s->line_compare) 1656 addr1 = 0; 1657 d += linesize; 1658 } 1659 if (y_start >= 0) { 1660 /* flush to display */ 1661 dpy_gfx_update(s->con, 0, y_start, 1662 disp_width, y - y_start); 1663 } 1664 /* reset modified pages */ 1665 if (page_max >= page_min) { 1666 memory_region_reset_dirty(&s->vram, 1667 page_min, 1668 page_max - page_min, 1669 DIRTY_MEMORY_VGA); 1670 } 1671 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4); 1672 } 1673 1674 static void vga_draw_blank(VGACommonState *s, int full_update) 1675 { 1676 DisplaySurface *surface = qemu_console_surface(s->con); 1677 int i, w; 1678 uint8_t *d; 1679 1680 if (!full_update) 1681 return; 1682 if (s->last_scr_width <= 0 || s->last_scr_height <= 0) 1683 return; 1684 1685 w = s->last_scr_width * surface_bytes_per_pixel(surface); 1686 d = surface_data(surface); 1687 for(i = 0; i < s->last_scr_height; i++) { 1688 memset(d, 0, w); 1689 d += surface_stride(surface); 1690 } 1691 dpy_gfx_update(s->con, 0, 0, 1692 s->last_scr_width, s->last_scr_height); 1693 } 1694 1695 #define GMODE_TEXT 0 1696 #define GMODE_GRAPH 1 1697 #define GMODE_BLANK 2 1698 1699 static void vga_update_display(void *opaque) 1700 { 1701 VGACommonState *s = opaque; 1702 DisplaySurface *surface = qemu_console_surface(s->con); 1703 int full_update, graphic_mode; 1704 1705 qemu_flush_coalesced_mmio_buffer(); 1706 1707 if (surface_bits_per_pixel(surface) == 0) { 1708 /* nothing to do */ 1709 } else { 1710 full_update = 0; 1711 if (!(s->ar_index & 0x20)) { 1712 graphic_mode = GMODE_BLANK; 1713 } else { 1714 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1715 } 1716 if (graphic_mode != s->graphic_mode) { 1717 s->graphic_mode = graphic_mode; 1718 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1719 full_update = 1; 1720 } 1721 switch(graphic_mode) { 1722 case GMODE_TEXT: 1723 vga_draw_text(s, full_update); 1724 break; 1725 case GMODE_GRAPH: 1726 vga_draw_graphic(s, full_update); 1727 break; 1728 case GMODE_BLANK: 1729 default: 1730 vga_draw_blank(s, full_update); 1731 break; 1732 } 1733 } 1734 } 1735 1736 /* force a full display refresh */ 1737 static void vga_invalidate_display(void *opaque) 1738 { 1739 VGACommonState *s = opaque; 1740 1741 s->last_width = -1; 1742 s->last_height = -1; 1743 } 1744 1745 void vga_common_reset(VGACommonState *s) 1746 { 1747 s->sr_index = 0; 1748 memset(s->sr, '\0', sizeof(s->sr)); 1749 s->gr_index = 0; 1750 memset(s->gr, '\0', sizeof(s->gr)); 1751 s->ar_index = 0; 1752 memset(s->ar, '\0', sizeof(s->ar)); 1753 s->ar_flip_flop = 0; 1754 s->cr_index = 0; 1755 memset(s->cr, '\0', sizeof(s->cr)); 1756 s->msr = 0; 1757 s->fcr = 0; 1758 s->st00 = 0; 1759 s->st01 = 0; 1760 s->dac_state = 0; 1761 s->dac_sub_index = 0; 1762 s->dac_read_index = 0; 1763 s->dac_write_index = 0; 1764 memset(s->dac_cache, '\0', sizeof(s->dac_cache)); 1765 s->dac_8bit = 0; 1766 memset(s->palette, '\0', sizeof(s->palette)); 1767 s->bank_offset = 0; 1768 s->vbe_index = 0; 1769 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs)); 1770 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5; 1771 s->vbe_start_addr = 0; 1772 s->vbe_line_offset = 0; 1773 s->vbe_bank_mask = (s->vram_size >> 16) - 1; 1774 memset(s->font_offsets, '\0', sizeof(s->font_offsets)); 1775 s->graphic_mode = -1; /* force full update */ 1776 s->shift_control = 0; 1777 s->double_scan = 0; 1778 s->line_offset = 0; 1779 s->line_compare = 0; 1780 s->start_addr = 0; 1781 s->plane_updated = 0; 1782 s->last_cw = 0; 1783 s->last_ch = 0; 1784 s->last_width = 0; 1785 s->last_height = 0; 1786 s->last_scr_width = 0; 1787 s->last_scr_height = 0; 1788 s->cursor_start = 0; 1789 s->cursor_end = 0; 1790 s->cursor_offset = 0; 1791 s->big_endian_fb = s->default_endian_fb; 1792 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table)); 1793 memset(s->last_palette, '\0', sizeof(s->last_palette)); 1794 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr)); 1795 switch (vga_retrace_method) { 1796 case VGA_RETRACE_DUMB: 1797 break; 1798 case VGA_RETRACE_PRECISE: 1799 memset(&s->retrace_info, 0, sizeof (s->retrace_info)); 1800 break; 1801 } 1802 vga_update_memory_access(s); 1803 } 1804 1805 static void vga_reset(void *opaque) 1806 { 1807 VGACommonState *s = opaque; 1808 vga_common_reset(s); 1809 } 1810 1811 #define TEXTMODE_X(x) ((x) % width) 1812 #define TEXTMODE_Y(x) ((x) / width) 1813 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \ 1814 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1)) 1815 /* relay text rendering to the display driver 1816 * instead of doing a full vga_update_display() */ 1817 static void vga_update_text(void *opaque, console_ch_t *chardata) 1818 { 1819 VGACommonState *s = opaque; 1820 int graphic_mode, i, cursor_offset, cursor_visible; 1821 int cw, cheight, width, height, size, c_min, c_max; 1822 uint32_t *src; 1823 console_ch_t *dst, val; 1824 char msg_buffer[80]; 1825 int full_update = 0; 1826 1827 qemu_flush_coalesced_mmio_buffer(); 1828 1829 if (!(s->ar_index & 0x20)) { 1830 graphic_mode = GMODE_BLANK; 1831 } else { 1832 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1833 } 1834 if (graphic_mode != s->graphic_mode) { 1835 s->graphic_mode = graphic_mode; 1836 full_update = 1; 1837 } 1838 if (s->last_width == -1) { 1839 s->last_width = 0; 1840 full_update = 1; 1841 } 1842 1843 switch (graphic_mode) { 1844 case GMODE_TEXT: 1845 /* TODO: update palette */ 1846 full_update |= update_basic_params(s); 1847 1848 /* total width & height */ 1849 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1850 cw = 8; 1851 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) { 1852 cw = 9; 1853 } 1854 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) { 1855 cw = 16; /* NOTE: no 18 pixel wide */ 1856 } 1857 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1858 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1859 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1860 height = 100; 1861 } else { 1862 height = s->cr[VGA_CRTC_V_DISP_END] | 1863 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1864 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1865 height = (height + 1) / cheight; 1866 } 1867 1868 size = (height * width); 1869 if (size > CH_ATTR_SIZE) { 1870 if (!full_update) 1871 return; 1872 1873 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode", 1874 width, height); 1875 break; 1876 } 1877 1878 if (width != s->last_width || height != s->last_height || 1879 cw != s->last_cw || cheight != s->last_ch) { 1880 s->last_scr_width = width * cw; 1881 s->last_scr_height = height * cheight; 1882 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1883 dpy_text_resize(s->con, width, height); 1884 s->last_depth = 0; 1885 s->last_width = width; 1886 s->last_height = height; 1887 s->last_ch = cheight; 1888 s->last_cw = cw; 1889 full_update = 1; 1890 } 1891 1892 if (full_update) { 1893 s->full_update_gfx = 1; 1894 } 1895 if (s->full_update_text) { 1896 s->full_update_text = 0; 1897 full_update |= 1; 1898 } 1899 1900 /* Update "hardware" cursor */ 1901 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1902 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; 1903 if (cursor_offset != s->cursor_offset || 1904 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1905 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) { 1906 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20); 1907 if (cursor_visible && cursor_offset < size && cursor_offset >= 0) 1908 dpy_text_cursor(s->con, 1909 TEXTMODE_X(cursor_offset), 1910 TEXTMODE_Y(cursor_offset)); 1911 else 1912 dpy_text_cursor(s->con, -1, -1); 1913 s->cursor_offset = cursor_offset; 1914 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1915 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1916 } 1917 1918 src = (uint32_t *) s->vram_ptr + s->start_addr; 1919 dst = chardata; 1920 1921 if (full_update) { 1922 for (i = 0; i < size; src ++, dst ++, i ++) 1923 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src))); 1924 1925 dpy_text_update(s->con, 0, 0, width, height); 1926 } else { 1927 c_max = 0; 1928 1929 for (i = 0; i < size; src ++, dst ++, i ++) { 1930 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 1931 if (*dst != val) { 1932 *dst = val; 1933 c_max = i; 1934 break; 1935 } 1936 } 1937 c_min = i; 1938 for (; i < size; src ++, dst ++, i ++) { 1939 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 1940 if (*dst != val) { 1941 *dst = val; 1942 c_max = i; 1943 } 1944 } 1945 1946 if (c_min <= c_max) { 1947 i = TEXTMODE_Y(c_min); 1948 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1); 1949 } 1950 } 1951 1952 return; 1953 case GMODE_GRAPH: 1954 if (!full_update) 1955 return; 1956 1957 s->get_resolution(s, &width, &height); 1958 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode", 1959 width, height); 1960 break; 1961 case GMODE_BLANK: 1962 default: 1963 if (!full_update) 1964 return; 1965 1966 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode"); 1967 break; 1968 } 1969 1970 /* Display a message */ 1971 s->last_width = 60; 1972 s->last_height = height = 3; 1973 dpy_text_cursor(s->con, -1, -1); 1974 dpy_text_resize(s->con, s->last_width, height); 1975 1976 for (dst = chardata, i = 0; i < s->last_width * height; i ++) 1977 console_write_ch(dst ++, ' '); 1978 1979 size = strlen(msg_buffer); 1980 width = (s->last_width - size) / 2; 1981 dst = chardata + s->last_width + width; 1982 for (i = 0; i < size; i ++) 1983 console_write_ch(dst ++, 0x00200100 | msg_buffer[i]); 1984 1985 dpy_text_update(s->con, 0, 0, s->last_width, height); 1986 } 1987 1988 static uint64_t vga_mem_read(void *opaque, hwaddr addr, 1989 unsigned size) 1990 { 1991 VGACommonState *s = opaque; 1992 1993 return vga_mem_readb(s, addr); 1994 } 1995 1996 static void vga_mem_write(void *opaque, hwaddr addr, 1997 uint64_t data, unsigned size) 1998 { 1999 VGACommonState *s = opaque; 2000 2001 return vga_mem_writeb(s, addr, data); 2002 } 2003 2004 const MemoryRegionOps vga_mem_ops = { 2005 .read = vga_mem_read, 2006 .write = vga_mem_write, 2007 .endianness = DEVICE_LITTLE_ENDIAN, 2008 .impl = { 2009 .min_access_size = 1, 2010 .max_access_size = 1, 2011 }, 2012 }; 2013 2014 static int vga_common_post_load(void *opaque, int version_id) 2015 { 2016 VGACommonState *s = opaque; 2017 2018 /* force refresh */ 2019 s->graphic_mode = -1; 2020 return 0; 2021 } 2022 2023 static bool vga_endian_state_needed(void *opaque) 2024 { 2025 VGACommonState *s = opaque; 2026 2027 /* 2028 * Only send the endian state if it's different from the 2029 * default one, thus ensuring backward compatibility for 2030 * migration of the common case 2031 */ 2032 return s->default_endian_fb != s->big_endian_fb; 2033 } 2034 2035 const VMStateDescription vmstate_vga_endian = { 2036 .name = "vga.endian", 2037 .version_id = 1, 2038 .minimum_version_id = 1, 2039 .fields = (VMStateField[]) { 2040 VMSTATE_BOOL(big_endian_fb, VGACommonState), 2041 VMSTATE_END_OF_LIST() 2042 } 2043 }; 2044 2045 const VMStateDescription vmstate_vga_common = { 2046 .name = "vga", 2047 .version_id = 2, 2048 .minimum_version_id = 2, 2049 .post_load = vga_common_post_load, 2050 .fields = (VMStateField[]) { 2051 VMSTATE_UINT32(latch, VGACommonState), 2052 VMSTATE_UINT8(sr_index, VGACommonState), 2053 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8), 2054 VMSTATE_UINT8(gr_index, VGACommonState), 2055 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16), 2056 VMSTATE_UINT8(ar_index, VGACommonState), 2057 VMSTATE_BUFFER(ar, VGACommonState), 2058 VMSTATE_INT32(ar_flip_flop, VGACommonState), 2059 VMSTATE_UINT8(cr_index, VGACommonState), 2060 VMSTATE_BUFFER(cr, VGACommonState), 2061 VMSTATE_UINT8(msr, VGACommonState), 2062 VMSTATE_UINT8(fcr, VGACommonState), 2063 VMSTATE_UINT8(st00, VGACommonState), 2064 VMSTATE_UINT8(st01, VGACommonState), 2065 2066 VMSTATE_UINT8(dac_state, VGACommonState), 2067 VMSTATE_UINT8(dac_sub_index, VGACommonState), 2068 VMSTATE_UINT8(dac_read_index, VGACommonState), 2069 VMSTATE_UINT8(dac_write_index, VGACommonState), 2070 VMSTATE_BUFFER(dac_cache, VGACommonState), 2071 VMSTATE_BUFFER(palette, VGACommonState), 2072 2073 VMSTATE_INT32(bank_offset, VGACommonState), 2074 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState), 2075 VMSTATE_UINT16(vbe_index, VGACommonState), 2076 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB), 2077 VMSTATE_UINT32(vbe_start_addr, VGACommonState), 2078 VMSTATE_UINT32(vbe_line_offset, VGACommonState), 2079 VMSTATE_UINT32(vbe_bank_mask, VGACommonState), 2080 VMSTATE_END_OF_LIST() 2081 }, 2082 .subsections = (VMStateSubsection []) { 2083 { 2084 .vmsd = &vmstate_vga_endian, 2085 .needed = vga_endian_state_needed, 2086 }, { 2087 /* empty */ 2088 } 2089 } 2090 }; 2091 2092 static const GraphicHwOps vga_ops = { 2093 .invalidate = vga_invalidate_display, 2094 .gfx_update = vga_update_display, 2095 .text_update = vga_update_text, 2096 }; 2097 2098 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate) 2099 { 2100 int i, j, v, b; 2101 2102 for(i = 0;i < 256; i++) { 2103 v = 0; 2104 for(j = 0; j < 8; j++) { 2105 v |= ((i >> j) & 1) << (j * 4); 2106 } 2107 expand4[i] = v; 2108 2109 v = 0; 2110 for(j = 0; j < 4; j++) { 2111 v |= ((i >> (2 * j)) & 3) << (j * 4); 2112 } 2113 expand2[i] = v; 2114 } 2115 for(i = 0; i < 16; i++) { 2116 v = 0; 2117 for(j = 0; j < 4; j++) { 2118 b = ((i >> j) & 1); 2119 v |= b << (2 * j); 2120 v |= b << (2 * j + 1); 2121 } 2122 expand4to8[i] = v; 2123 } 2124 2125 /* valid range: 1 MB -> 256 MB */ 2126 s->vram_size = 1024 * 1024; 2127 while (s->vram_size < (s->vram_size_mb << 20) && 2128 s->vram_size < (256 << 20)) { 2129 s->vram_size <<= 1; 2130 } 2131 s->vram_size_mb = s->vram_size >> 20; 2132 if (!s->vbe_size) { 2133 s->vbe_size = s->vram_size; 2134 } 2135 2136 s->is_vbe_vmstate = 1; 2137 memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size, 2138 &error_abort); 2139 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj)); 2140 xen_register_framebuffer(&s->vram); 2141 s->vram_ptr = memory_region_get_ram_ptr(&s->vram); 2142 s->get_bpp = vga_get_bpp; 2143 s->get_offsets = vga_get_offsets; 2144 s->get_resolution = vga_get_resolution; 2145 s->hw_ops = &vga_ops; 2146 switch (vga_retrace_method) { 2147 case VGA_RETRACE_DUMB: 2148 s->retrace = vga_dumb_retrace; 2149 s->update_retrace_info = vga_dumb_update_retrace_info; 2150 break; 2151 2152 case VGA_RETRACE_PRECISE: 2153 s->retrace = vga_precise_retrace; 2154 s->update_retrace_info = vga_precise_update_retrace_info; 2155 break; 2156 } 2157 2158 /* 2159 * Set default fb endian based on target, could probably be turned 2160 * into a device attribute set by the machine/platform to remove 2161 * all target endian dependencies from this file. 2162 */ 2163 #ifdef TARGET_WORDS_BIGENDIAN 2164 s->default_endian_fb = true; 2165 #else 2166 s->default_endian_fb = false; 2167 #endif 2168 vga_dirty_log_start(s); 2169 } 2170 2171 static const MemoryRegionPortio vga_portio_list[] = { 2172 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */ 2173 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */ 2174 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */ 2175 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */ 2176 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */ 2177 PORTIO_END_OF_LIST(), 2178 }; 2179 2180 static const MemoryRegionPortio vbe_portio_list[] = { 2181 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index }, 2182 # ifdef TARGET_I386 2183 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2184 # endif 2185 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2186 PORTIO_END_OF_LIST(), 2187 }; 2188 2189 /* Used by both ISA and PCI */ 2190 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj, 2191 const MemoryRegionPortio **vga_ports, 2192 const MemoryRegionPortio **vbe_ports) 2193 { 2194 MemoryRegion *vga_mem; 2195 2196 *vga_ports = vga_portio_list; 2197 *vbe_ports = vbe_portio_list; 2198 2199 vga_mem = g_malloc(sizeof(*vga_mem)); 2200 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s, 2201 "vga-lowmem", 0x20000); 2202 memory_region_set_flush_coalesced(vga_mem); 2203 2204 return vga_mem; 2205 } 2206 2207 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space, 2208 MemoryRegion *address_space_io, bool init_vga_ports) 2209 { 2210 MemoryRegion *vga_io_memory; 2211 const MemoryRegionPortio *vga_ports, *vbe_ports; 2212 2213 qemu_register_reset(vga_reset, s); 2214 2215 s->bank_offset = 0; 2216 2217 s->legacy_address_space = address_space; 2218 2219 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports); 2220 memory_region_add_subregion_overlap(address_space, 2221 isa_mem_base + 0x000a0000, 2222 vga_io_memory, 2223 1); 2224 memory_region_set_coalescing(vga_io_memory); 2225 if (init_vga_ports) { 2226 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga"); 2227 portio_list_set_flush_coalesced(&s->vga_port_list); 2228 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0); 2229 } 2230 if (vbe_ports) { 2231 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe"); 2232 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce); 2233 } 2234 } 2235 2236 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory) 2237 { 2238 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region, 2239 * so use an alias to avoid double-mapping the same region. 2240 */ 2241 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe", 2242 &s->vram, 0, memory_region_size(&s->vram)); 2243 /* XXX: use optimized standard vga accesses */ 2244 memory_region_add_subregion(system_memory, 2245 VBE_DISPI_LFB_PHYSICAL_ADDRESS, 2246 &s->vram_vbe); 2247 s->vbe_mapped = 1; 2248 } 2249