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 "qemu/osdep.h" 25 #include "qapi/error.h" 26 #include "hw/hw.h" 27 #include "hw/display/vga.h" 28 #include "hw/pci/pci.h" 29 #include "vga_int.h" 30 #include "vga_regs.h" 31 #include "ui/pixel_ops.h" 32 #include "qemu/timer.h" 33 #include "hw/xen/xen.h" 34 #include "trace.h" 35 36 //#define DEBUG_VGA_MEM 37 //#define DEBUG_VGA_REG 38 39 /* 16 state changes per vertical frame @60 Hz */ 40 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) 41 42 /* 43 * Video Graphics Array (VGA) 44 * 45 * Chipset docs for original IBM VGA: 46 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf 47 * 48 * FreeVGA site: 49 * http://www.osdever.net/FreeVGA/home.htm 50 * 51 * Standard VGA features and Bochs VBE extensions are implemented. 52 */ 53 54 /* force some bits to zero */ 55 const uint8_t sr_mask[8] = { 56 0x03, 57 0x3d, 58 0x0f, 59 0x3f, 60 0x0e, 61 0x00, 62 0x00, 63 0xff, 64 }; 65 66 const uint8_t gr_mask[16] = { 67 0x0f, /* 0x00 */ 68 0x0f, /* 0x01 */ 69 0x0f, /* 0x02 */ 70 0x1f, /* 0x03 */ 71 0x03, /* 0x04 */ 72 0x7b, /* 0x05 */ 73 0x0f, /* 0x06 */ 74 0x0f, /* 0x07 */ 75 0xff, /* 0x08 */ 76 0x00, /* 0x09 */ 77 0x00, /* 0x0a */ 78 0x00, /* 0x0b */ 79 0x00, /* 0x0c */ 80 0x00, /* 0x0d */ 81 0x00, /* 0x0e */ 82 0x00, /* 0x0f */ 83 }; 84 85 #define cbswap_32(__x) \ 86 ((uint32_t)( \ 87 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ 88 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ 89 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ 90 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )) 91 92 #ifdef HOST_WORDS_BIGENDIAN 93 #define PAT(x) cbswap_32(x) 94 #else 95 #define PAT(x) (x) 96 #endif 97 98 #ifdef HOST_WORDS_BIGENDIAN 99 #define BIG 1 100 #else 101 #define BIG 0 102 #endif 103 104 #ifdef HOST_WORDS_BIGENDIAN 105 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff) 106 #else 107 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff) 108 #endif 109 110 static const uint32_t mask16[16] = { 111 PAT(0x00000000), 112 PAT(0x000000ff), 113 PAT(0x0000ff00), 114 PAT(0x0000ffff), 115 PAT(0x00ff0000), 116 PAT(0x00ff00ff), 117 PAT(0x00ffff00), 118 PAT(0x00ffffff), 119 PAT(0xff000000), 120 PAT(0xff0000ff), 121 PAT(0xff00ff00), 122 PAT(0xff00ffff), 123 PAT(0xffff0000), 124 PAT(0xffff00ff), 125 PAT(0xffffff00), 126 PAT(0xffffffff), 127 }; 128 129 #undef PAT 130 131 #ifdef HOST_WORDS_BIGENDIAN 132 #define PAT(x) (x) 133 #else 134 #define PAT(x) cbswap_32(x) 135 #endif 136 137 static uint32_t expand4[256]; 138 static uint16_t expand2[256]; 139 static uint8_t expand4to8[16]; 140 141 static void vbe_update_vgaregs(VGACommonState *s); 142 143 static inline bool vbe_enabled(VGACommonState *s) 144 { 145 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED; 146 } 147 148 static inline uint8_t sr(VGACommonState *s, int idx) 149 { 150 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx]; 151 } 152 153 static void vga_update_memory_access(VGACommonState *s) 154 { 155 hwaddr base, offset, size; 156 157 if (s->legacy_address_space == NULL) { 158 return; 159 } 160 161 if (s->has_chain4_alias) { 162 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias); 163 object_unparent(OBJECT(&s->chain4_alias)); 164 s->has_chain4_alias = false; 165 s->plane_updated = 0xf; 166 } 167 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) == 168 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 169 offset = 0; 170 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) { 171 case 0: 172 base = 0xa0000; 173 size = 0x20000; 174 break; 175 case 1: 176 base = 0xa0000; 177 size = 0x10000; 178 offset = s->bank_offset; 179 break; 180 case 2: 181 base = 0xb0000; 182 size = 0x8000; 183 break; 184 case 3: 185 default: 186 base = 0xb8000; 187 size = 0x8000; 188 break; 189 } 190 assert(offset + size <= s->vram_size); 191 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram), 192 "vga.chain4", &s->vram, offset, size); 193 memory_region_add_subregion_overlap(s->legacy_address_space, base, 194 &s->chain4_alias, 2); 195 s->has_chain4_alias = true; 196 } 197 } 198 199 static void vga_dumb_update_retrace_info(VGACommonState *s) 200 { 201 (void) s; 202 } 203 204 static void vga_precise_update_retrace_info(VGACommonState *s) 205 { 206 int htotal_chars; 207 int hretr_start_char; 208 int hretr_skew_chars; 209 int hretr_end_char; 210 211 int vtotal_lines; 212 int vretr_start_line; 213 int vretr_end_line; 214 215 int dots; 216 #if 0 217 int div2, sldiv2; 218 #endif 219 int clocking_mode; 220 int clock_sel; 221 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000}; 222 int64_t chars_per_sec; 223 struct vga_precise_retrace *r = &s->retrace_info.precise; 224 225 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5; 226 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START]; 227 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3; 228 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f; 229 230 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] | 231 (((s->cr[VGA_CRTC_OVERFLOW] & 1) | 232 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2; 233 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] | 234 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) | 235 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8); 236 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf; 237 238 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1; 239 clock_sel = (s->msr >> 2) & 3; 240 dots = (s->msr & 1) ? 8 : 9; 241 242 chars_per_sec = clk_hz[clock_sel] / dots; 243 244 htotal_chars <<= clocking_mode; 245 246 r->total_chars = vtotal_lines * htotal_chars; 247 if (r->freq) { 248 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq); 249 } else { 250 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec; 251 } 252 253 r->vstart = vretr_start_line; 254 r->vend = r->vstart + vretr_end_line + 1; 255 256 r->hstart = hretr_start_char + hretr_skew_chars; 257 r->hend = r->hstart + hretr_end_char + 1; 258 r->htotal = htotal_chars; 259 260 #if 0 261 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1; 262 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1; 263 printf ( 264 "hz=%f\n" 265 "htotal = %d\n" 266 "hretr_start = %d\n" 267 "hretr_skew = %d\n" 268 "hretr_end = %d\n" 269 "vtotal = %d\n" 270 "vretr_start = %d\n" 271 "vretr_end = %d\n" 272 "div2 = %d sldiv2 = %d\n" 273 "clocking_mode = %d\n" 274 "clock_sel = %d %d\n" 275 "dots = %d\n" 276 "ticks/char = %" PRId64 "\n" 277 "\n", 278 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars), 279 htotal_chars, 280 hretr_start_char, 281 hretr_skew_chars, 282 hretr_end_char, 283 vtotal_lines, 284 vretr_start_line, 285 vretr_end_line, 286 div2, sldiv2, 287 clocking_mode, 288 clock_sel, 289 clk_hz[clock_sel], 290 dots, 291 r->ticks_per_char 292 ); 293 #endif 294 } 295 296 static uint8_t vga_precise_retrace(VGACommonState *s) 297 { 298 struct vga_precise_retrace *r = &s->retrace_info.precise; 299 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE); 300 301 if (r->total_chars) { 302 int cur_line, cur_line_char, cur_char; 303 int64_t cur_tick; 304 305 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 306 307 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars; 308 cur_line = cur_char / r->htotal; 309 310 if (cur_line >= r->vstart && cur_line <= r->vend) { 311 val |= ST01_V_RETRACE | ST01_DISP_ENABLE; 312 } else { 313 cur_line_char = cur_char % r->htotal; 314 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) { 315 val |= ST01_DISP_ENABLE; 316 } 317 } 318 319 return val; 320 } else { 321 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 322 } 323 } 324 325 static uint8_t vga_dumb_retrace(VGACommonState *s) 326 { 327 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 328 } 329 330 int vga_ioport_invalid(VGACommonState *s, uint32_t addr) 331 { 332 if (s->msr & VGA_MIS_COLOR) { 333 /* Color */ 334 return (addr >= 0x3b0 && addr <= 0x3bf); 335 } else { 336 /* Monochrome */ 337 return (addr >= 0x3d0 && addr <= 0x3df); 338 } 339 } 340 341 uint32_t vga_ioport_read(void *opaque, uint32_t addr) 342 { 343 VGACommonState *s = opaque; 344 int val, index; 345 346 if (vga_ioport_invalid(s, addr)) { 347 val = 0xff; 348 } else { 349 switch(addr) { 350 case VGA_ATT_W: 351 if (s->ar_flip_flop == 0) { 352 val = s->ar_index; 353 } else { 354 val = 0; 355 } 356 break; 357 case VGA_ATT_R: 358 index = s->ar_index & 0x1f; 359 if (index < VGA_ATT_C) { 360 val = s->ar[index]; 361 } else { 362 val = 0; 363 } 364 break; 365 case VGA_MIS_W: 366 val = s->st00; 367 break; 368 case VGA_SEQ_I: 369 val = s->sr_index; 370 break; 371 case VGA_SEQ_D: 372 val = s->sr[s->sr_index]; 373 #ifdef DEBUG_VGA_REG 374 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); 375 #endif 376 break; 377 case VGA_PEL_IR: 378 val = s->dac_state; 379 break; 380 case VGA_PEL_IW: 381 val = s->dac_write_index; 382 break; 383 case VGA_PEL_D: 384 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index]; 385 if (++s->dac_sub_index == 3) { 386 s->dac_sub_index = 0; 387 s->dac_read_index++; 388 } 389 break; 390 case VGA_FTC_R: 391 val = s->fcr; 392 break; 393 case VGA_MIS_R: 394 val = s->msr; 395 break; 396 case VGA_GFX_I: 397 val = s->gr_index; 398 break; 399 case VGA_GFX_D: 400 val = s->gr[s->gr_index]; 401 #ifdef DEBUG_VGA_REG 402 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); 403 #endif 404 break; 405 case VGA_CRT_IM: 406 case VGA_CRT_IC: 407 val = s->cr_index; 408 break; 409 case VGA_CRT_DM: 410 case VGA_CRT_DC: 411 val = s->cr[s->cr_index]; 412 #ifdef DEBUG_VGA_REG 413 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); 414 #endif 415 break; 416 case VGA_IS1_RM: 417 case VGA_IS1_RC: 418 /* just toggle to fool polling */ 419 val = s->st01 = s->retrace(s); 420 s->ar_flip_flop = 0; 421 break; 422 default: 423 val = 0x00; 424 break; 425 } 426 } 427 trace_vga_std_read_io(addr, val); 428 return val; 429 } 430 431 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val) 432 { 433 VGACommonState *s = opaque; 434 int index; 435 436 /* check port range access depending on color/monochrome mode */ 437 if (vga_ioport_invalid(s, addr)) { 438 return; 439 } 440 trace_vga_std_write_io(addr, val); 441 442 switch(addr) { 443 case VGA_ATT_W: 444 if (s->ar_flip_flop == 0) { 445 val &= 0x3f; 446 s->ar_index = val; 447 } else { 448 index = s->ar_index & 0x1f; 449 switch(index) { 450 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF: 451 s->ar[index] = val & 0x3f; 452 break; 453 case VGA_ATC_MODE: 454 s->ar[index] = val & ~0x10; 455 break; 456 case VGA_ATC_OVERSCAN: 457 s->ar[index] = val; 458 break; 459 case VGA_ATC_PLANE_ENABLE: 460 s->ar[index] = val & ~0xc0; 461 break; 462 case VGA_ATC_PEL: 463 s->ar[index] = val & ~0xf0; 464 break; 465 case VGA_ATC_COLOR_PAGE: 466 s->ar[index] = val & ~0xf0; 467 break; 468 default: 469 break; 470 } 471 } 472 s->ar_flip_flop ^= 1; 473 break; 474 case VGA_MIS_W: 475 s->msr = val & ~0x10; 476 s->update_retrace_info(s); 477 break; 478 case VGA_SEQ_I: 479 s->sr_index = val & 7; 480 break; 481 case VGA_SEQ_D: 482 #ifdef DEBUG_VGA_REG 483 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); 484 #endif 485 s->sr[s->sr_index] = val & sr_mask[s->sr_index]; 486 if (s->sr_index == VGA_SEQ_CLOCK_MODE) { 487 s->update_retrace_info(s); 488 } 489 vga_update_memory_access(s); 490 break; 491 case VGA_PEL_IR: 492 s->dac_read_index = val; 493 s->dac_sub_index = 0; 494 s->dac_state = 3; 495 break; 496 case VGA_PEL_IW: 497 s->dac_write_index = val; 498 s->dac_sub_index = 0; 499 s->dac_state = 0; 500 break; 501 case VGA_PEL_D: 502 s->dac_cache[s->dac_sub_index] = val; 503 if (++s->dac_sub_index == 3) { 504 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); 505 s->dac_sub_index = 0; 506 s->dac_write_index++; 507 } 508 break; 509 case VGA_GFX_I: 510 s->gr_index = val & 0x0f; 511 break; 512 case VGA_GFX_D: 513 #ifdef DEBUG_VGA_REG 514 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); 515 #endif 516 s->gr[s->gr_index] = val & gr_mask[s->gr_index]; 517 vbe_update_vgaregs(s); 518 vga_update_memory_access(s); 519 break; 520 case VGA_CRT_IM: 521 case VGA_CRT_IC: 522 s->cr_index = val; 523 break; 524 case VGA_CRT_DM: 525 case VGA_CRT_DC: 526 #ifdef DEBUG_VGA_REG 527 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); 528 #endif 529 /* handle CR0-7 protection */ 530 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) && 531 s->cr_index <= VGA_CRTC_OVERFLOW) { 532 /* can always write bit 4 of CR7 */ 533 if (s->cr_index == VGA_CRTC_OVERFLOW) { 534 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | 535 (val & 0x10); 536 vbe_update_vgaregs(s); 537 } 538 return; 539 } 540 s->cr[s->cr_index] = val; 541 vbe_update_vgaregs(s); 542 543 switch(s->cr_index) { 544 case VGA_CRTC_H_TOTAL: 545 case VGA_CRTC_H_SYNC_START: 546 case VGA_CRTC_H_SYNC_END: 547 case VGA_CRTC_V_TOTAL: 548 case VGA_CRTC_OVERFLOW: 549 case VGA_CRTC_V_SYNC_END: 550 case VGA_CRTC_MODE: 551 s->update_retrace_info(s); 552 break; 553 } 554 break; 555 case VGA_IS1_RM: 556 case VGA_IS1_RC: 557 s->fcr = val & 0x10; 558 break; 559 } 560 } 561 562 /* 563 * Sanity check vbe register writes. 564 * 565 * As we don't have a way to signal errors to the guest in the bochs 566 * dispi interface we'll go adjust the registers to the closest valid 567 * value. 568 */ 569 static void vbe_fixup_regs(VGACommonState *s) 570 { 571 uint16_t *r = s->vbe_regs; 572 uint32_t bits, linelength, maxy, offset; 573 574 if (!vbe_enabled(s)) { 575 /* vbe is turned off -- nothing to do */ 576 return; 577 } 578 579 /* check depth */ 580 switch (r[VBE_DISPI_INDEX_BPP]) { 581 case 4: 582 case 8: 583 case 16: 584 case 24: 585 case 32: 586 bits = r[VBE_DISPI_INDEX_BPP]; 587 break; 588 case 15: 589 bits = 16; 590 break; 591 default: 592 bits = r[VBE_DISPI_INDEX_BPP] = 8; 593 break; 594 } 595 596 /* check width */ 597 r[VBE_DISPI_INDEX_XRES] &= ~7u; 598 if (r[VBE_DISPI_INDEX_XRES] == 0) { 599 r[VBE_DISPI_INDEX_XRES] = 8; 600 } 601 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) { 602 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES; 603 } 604 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u; 605 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) { 606 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES; 607 } 608 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) { 609 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES]; 610 } 611 612 /* check height */ 613 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8; 614 maxy = s->vbe_size / linelength; 615 if (r[VBE_DISPI_INDEX_YRES] == 0) { 616 r[VBE_DISPI_INDEX_YRES] = 1; 617 } 618 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) { 619 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES; 620 } 621 if (r[VBE_DISPI_INDEX_YRES] > maxy) { 622 r[VBE_DISPI_INDEX_YRES] = maxy; 623 } 624 625 /* check offset */ 626 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) { 627 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES; 628 } 629 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) { 630 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES; 631 } 632 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 633 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength; 634 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 635 r[VBE_DISPI_INDEX_Y_OFFSET] = 0; 636 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 637 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 638 r[VBE_DISPI_INDEX_X_OFFSET] = 0; 639 offset = 0; 640 } 641 } 642 643 /* update vga state */ 644 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy; 645 s->vbe_line_offset = linelength; 646 s->vbe_start_addr = offset / 4; 647 } 648 649 /* we initialize the VGA graphic mode */ 650 static void vbe_update_vgaregs(VGACommonState *s) 651 { 652 int h, shift_control; 653 654 if (!vbe_enabled(s)) { 655 /* vbe is turned off -- nothing to do */ 656 return; 657 } 658 659 /* graphic mode + memory map 1 */ 660 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 | 661 VGA_GR06_GRAPHICS_MODE; 662 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */ 663 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3; 664 /* width */ 665 s->cr[VGA_CRTC_H_DISP] = 666 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1; 667 /* height (only meaningful if < 1024) */ 668 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1; 669 s->cr[VGA_CRTC_V_DISP_END] = h; 670 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) | 671 ((h >> 7) & 0x02) | ((h >> 3) & 0x40); 672 /* line compare to 1023 */ 673 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff; 674 s->cr[VGA_CRTC_OVERFLOW] |= 0x10; 675 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40; 676 677 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) { 678 shift_control = 0; 679 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */ 680 } else { 681 shift_control = 2; 682 /* set chain 4 mode */ 683 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M; 684 /* activate all planes */ 685 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES; 686 } 687 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) | 688 (shift_control << 5); 689 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */ 690 } 691 692 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr) 693 { 694 VGACommonState *s = opaque; 695 return s->vbe_index; 696 } 697 698 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr) 699 { 700 VGACommonState *s = opaque; 701 uint32_t val; 702 703 if (s->vbe_index < VBE_DISPI_INDEX_NB) { 704 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) { 705 switch(s->vbe_index) { 706 /* XXX: do not hardcode ? */ 707 case VBE_DISPI_INDEX_XRES: 708 val = VBE_DISPI_MAX_XRES; 709 break; 710 case VBE_DISPI_INDEX_YRES: 711 val = VBE_DISPI_MAX_YRES; 712 break; 713 case VBE_DISPI_INDEX_BPP: 714 val = VBE_DISPI_MAX_BPP; 715 break; 716 default: 717 val = s->vbe_regs[s->vbe_index]; 718 break; 719 } 720 } else { 721 val = s->vbe_regs[s->vbe_index]; 722 } 723 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) { 724 val = s->vbe_size / (64 * 1024); 725 } else { 726 val = 0; 727 } 728 trace_vga_vbe_read(s->vbe_index, val); 729 return val; 730 } 731 732 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val) 733 { 734 VGACommonState *s = opaque; 735 s->vbe_index = val; 736 } 737 738 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val) 739 { 740 VGACommonState *s = opaque; 741 742 if (s->vbe_index <= VBE_DISPI_INDEX_NB) { 743 trace_vga_vbe_write(s->vbe_index, val); 744 switch(s->vbe_index) { 745 case VBE_DISPI_INDEX_ID: 746 if (val == VBE_DISPI_ID0 || 747 val == VBE_DISPI_ID1 || 748 val == VBE_DISPI_ID2 || 749 val == VBE_DISPI_ID3 || 750 val == VBE_DISPI_ID4) { 751 s->vbe_regs[s->vbe_index] = val; 752 } 753 break; 754 case VBE_DISPI_INDEX_XRES: 755 case VBE_DISPI_INDEX_YRES: 756 case VBE_DISPI_INDEX_BPP: 757 case VBE_DISPI_INDEX_VIRT_WIDTH: 758 case VBE_DISPI_INDEX_X_OFFSET: 759 case VBE_DISPI_INDEX_Y_OFFSET: 760 s->vbe_regs[s->vbe_index] = val; 761 vbe_fixup_regs(s); 762 vbe_update_vgaregs(s); 763 break; 764 case VBE_DISPI_INDEX_BANK: 765 val &= s->vbe_bank_mask; 766 s->vbe_regs[s->vbe_index] = val; 767 s->bank_offset = (val << 16); 768 vga_update_memory_access(s); 769 break; 770 case VBE_DISPI_INDEX_ENABLE: 771 if ((val & VBE_DISPI_ENABLED) && 772 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) { 773 774 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0; 775 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0; 776 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0; 777 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED; 778 vbe_fixup_regs(s); 779 vbe_update_vgaregs(s); 780 781 /* clear the screen */ 782 if (!(val & VBE_DISPI_NOCLEARMEM)) { 783 memset(s->vram_ptr, 0, 784 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset); 785 } 786 } else { 787 s->bank_offset = 0; 788 } 789 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0; 790 s->vbe_regs[s->vbe_index] = val; 791 vga_update_memory_access(s); 792 break; 793 default: 794 break; 795 } 796 } 797 } 798 799 /* called for accesses between 0xa0000 and 0xc0000 */ 800 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr) 801 { 802 int memory_map_mode, plane; 803 uint32_t ret; 804 805 /* convert to VGA memory offset */ 806 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 807 addr &= 0x1ffff; 808 switch(memory_map_mode) { 809 case 0: 810 break; 811 case 1: 812 if (addr >= 0x10000) 813 return 0xff; 814 addr += s->bank_offset; 815 break; 816 case 2: 817 addr -= 0x10000; 818 if (addr >= 0x8000) 819 return 0xff; 820 break; 821 default: 822 case 3: 823 addr -= 0x18000; 824 if (addr >= 0x8000) 825 return 0xff; 826 break; 827 } 828 829 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 830 /* chain 4 mode : simplest access */ 831 assert(addr < s->vram_size); 832 ret = s->vram_ptr[addr]; 833 } else if (s->gr[VGA_GFX_MODE] & 0x10) { 834 /* odd/even mode (aka text mode mapping) */ 835 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); 836 addr = ((addr & ~1) << 1) | plane; 837 if (addr >= s->vram_size) { 838 return 0xff; 839 } 840 ret = s->vram_ptr[addr]; 841 } else { 842 /* standard VGA latched access */ 843 if (addr * sizeof(uint32_t) >= s->vram_size) { 844 return 0xff; 845 } 846 s->latch = ((uint32_t *)s->vram_ptr)[addr]; 847 848 if (!(s->gr[VGA_GFX_MODE] & 0x08)) { 849 /* read mode 0 */ 850 plane = s->gr[VGA_GFX_PLANE_READ]; 851 ret = GET_PLANE(s->latch, plane); 852 } else { 853 /* read mode 1 */ 854 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) & 855 mask16[s->gr[VGA_GFX_COMPARE_MASK]]; 856 ret |= ret >> 16; 857 ret |= ret >> 8; 858 ret = (~ret) & 0xff; 859 } 860 } 861 return ret; 862 } 863 864 /* called for accesses between 0xa0000 and 0xc0000 */ 865 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val) 866 { 867 int memory_map_mode, plane, write_mode, b, func_select, mask; 868 uint32_t write_mask, bit_mask, set_mask; 869 870 #ifdef DEBUG_VGA_MEM 871 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val); 872 #endif 873 /* convert to VGA memory offset */ 874 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 875 addr &= 0x1ffff; 876 switch(memory_map_mode) { 877 case 0: 878 break; 879 case 1: 880 if (addr >= 0x10000) 881 return; 882 addr += s->bank_offset; 883 break; 884 case 2: 885 addr -= 0x10000; 886 if (addr >= 0x8000) 887 return; 888 break; 889 default: 890 case 3: 891 addr -= 0x18000; 892 if (addr >= 0x8000) 893 return; 894 break; 895 } 896 897 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 898 /* chain 4 mode : simplest access */ 899 plane = addr & 3; 900 mask = (1 << plane); 901 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) { 902 assert(addr < s->vram_size); 903 s->vram_ptr[addr] = val; 904 #ifdef DEBUG_VGA_MEM 905 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr); 906 #endif 907 s->plane_updated |= mask; /* only used to detect font change */ 908 memory_region_set_dirty(&s->vram, addr, 1); 909 } 910 } else if (s->gr[VGA_GFX_MODE] & 0x10) { 911 /* odd/even mode (aka text mode mapping) */ 912 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); 913 mask = (1 << plane); 914 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) { 915 addr = ((addr & ~1) << 1) | plane; 916 if (addr >= s->vram_size) { 917 return; 918 } 919 s->vram_ptr[addr] = val; 920 #ifdef DEBUG_VGA_MEM 921 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr); 922 #endif 923 s->plane_updated |= mask; /* only used to detect font change */ 924 memory_region_set_dirty(&s->vram, addr, 1); 925 } 926 } else { 927 /* standard VGA latched access */ 928 write_mode = s->gr[VGA_GFX_MODE] & 3; 929 switch(write_mode) { 930 default: 931 case 0: 932 /* rotate */ 933 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 934 val = ((val >> b) | (val << (8 - b))) & 0xff; 935 val |= val << 8; 936 val |= val << 16; 937 938 /* apply set/reset mask */ 939 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]]; 940 val = (val & ~set_mask) | 941 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask); 942 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 943 break; 944 case 1: 945 val = s->latch; 946 goto do_write; 947 case 2: 948 val = mask16[val & 0x0f]; 949 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 950 break; 951 case 3: 952 /* rotate */ 953 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 954 val = (val >> b) | (val << (8 - b)); 955 956 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val; 957 val = mask16[s->gr[VGA_GFX_SR_VALUE]]; 958 break; 959 } 960 961 /* apply logical operation */ 962 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3; 963 switch(func_select) { 964 case 0: 965 default: 966 /* nothing to do */ 967 break; 968 case 1: 969 /* and */ 970 val &= s->latch; 971 break; 972 case 2: 973 /* or */ 974 val |= s->latch; 975 break; 976 case 3: 977 /* xor */ 978 val ^= s->latch; 979 break; 980 } 981 982 /* apply bit mask */ 983 bit_mask |= bit_mask << 8; 984 bit_mask |= bit_mask << 16; 985 val = (val & bit_mask) | (s->latch & ~bit_mask); 986 987 do_write: 988 /* mask data according to sr[2] */ 989 mask = sr(s, VGA_SEQ_PLANE_WRITE); 990 s->plane_updated |= mask; /* only used to detect font change */ 991 write_mask = mask16[mask]; 992 if (addr * sizeof(uint32_t) >= s->vram_size) { 993 return; 994 } 995 ((uint32_t *)s->vram_ptr)[addr] = 996 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | 997 (val & write_mask); 998 #ifdef DEBUG_VGA_MEM 999 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n", 1000 addr * 4, write_mask, val); 1001 #endif 1002 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t)); 1003 } 1004 } 1005 1006 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d, 1007 uint32_t srcaddr, int width); 1008 1009 #include "vga-helpers.h" 1010 1011 /* return true if the palette was modified */ 1012 static int update_palette16(VGACommonState *s) 1013 { 1014 int full_update, i; 1015 uint32_t v, col, *palette; 1016 1017 full_update = 0; 1018 palette = s->last_palette; 1019 for(i = 0; i < 16; i++) { 1020 v = s->ar[i]; 1021 if (s->ar[VGA_ATC_MODE] & 0x80) { 1022 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf); 1023 } else { 1024 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f); 1025 } 1026 v = v * 3; 1027 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1028 c6_to_8(s->palette[v + 1]), 1029 c6_to_8(s->palette[v + 2])); 1030 if (col != palette[i]) { 1031 full_update = 1; 1032 palette[i] = col; 1033 } 1034 } 1035 return full_update; 1036 } 1037 1038 /* return true if the palette was modified */ 1039 static int update_palette256(VGACommonState *s) 1040 { 1041 int full_update, i; 1042 uint32_t v, col, *palette; 1043 1044 full_update = 0; 1045 palette = s->last_palette; 1046 v = 0; 1047 for(i = 0; i < 256; i++) { 1048 if (s->dac_8bit) { 1049 col = rgb_to_pixel32(s->palette[v], 1050 s->palette[v + 1], 1051 s->palette[v + 2]); 1052 } else { 1053 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1054 c6_to_8(s->palette[v + 1]), 1055 c6_to_8(s->palette[v + 2])); 1056 } 1057 if (col != palette[i]) { 1058 full_update = 1; 1059 palette[i] = col; 1060 } 1061 v += 3; 1062 } 1063 return full_update; 1064 } 1065 1066 static void vga_get_offsets(VGACommonState *s, 1067 uint32_t *pline_offset, 1068 uint32_t *pstart_addr, 1069 uint32_t *pline_compare) 1070 { 1071 uint32_t start_addr, line_offset, line_compare; 1072 1073 if (vbe_enabled(s)) { 1074 line_offset = s->vbe_line_offset; 1075 start_addr = s->vbe_start_addr; 1076 line_compare = 65535; 1077 } else { 1078 /* compute line_offset in bytes */ 1079 line_offset = s->cr[VGA_CRTC_OFFSET]; 1080 line_offset <<= 3; 1081 1082 /* starting address */ 1083 start_addr = s->cr[VGA_CRTC_START_LO] | 1084 (s->cr[VGA_CRTC_START_HI] << 8); 1085 1086 /* line compare */ 1087 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] | 1088 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) | 1089 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3); 1090 } 1091 *pline_offset = line_offset; 1092 *pstart_addr = start_addr; 1093 *pline_compare = line_compare; 1094 } 1095 1096 /* update start_addr and line_offset. Return TRUE if modified */ 1097 static int update_basic_params(VGACommonState *s) 1098 { 1099 int full_update; 1100 uint32_t start_addr, line_offset, line_compare; 1101 1102 full_update = 0; 1103 1104 s->get_offsets(s, &line_offset, &start_addr, &line_compare); 1105 1106 if (line_offset != s->line_offset || 1107 start_addr != s->start_addr || 1108 line_compare != s->line_compare) { 1109 s->line_offset = line_offset; 1110 s->start_addr = start_addr; 1111 s->line_compare = line_compare; 1112 full_update = 1; 1113 } 1114 return full_update; 1115 } 1116 1117 1118 static const uint8_t cursor_glyph[32 * 4] = { 1119 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1126 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1128 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1129 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1130 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1135 }; 1136 1137 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight, 1138 int *pcwidth, int *pcheight) 1139 { 1140 int width, cwidth, height, cheight; 1141 1142 /* total width & height */ 1143 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1144 cwidth = 8; 1145 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { 1146 cwidth = 9; 1147 } 1148 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { 1149 cwidth = 16; /* NOTE: no 18 pixel wide */ 1150 } 1151 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1152 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1153 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1154 height = 100; 1155 } else { 1156 height = s->cr[VGA_CRTC_V_DISP_END] | 1157 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1158 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1159 height = (height + 1) / cheight; 1160 } 1161 1162 *pwidth = width; 1163 *pheight = height; 1164 *pcwidth = cwidth; 1165 *pcheight = cheight; 1166 } 1167 1168 /* 1169 * Text mode update 1170 * Missing: 1171 * - double scan 1172 * - double width 1173 * - underline 1174 * - flashing 1175 */ 1176 static void vga_draw_text(VGACommonState *s, int full_update) 1177 { 1178 DisplaySurface *surface = qemu_console_surface(s->con); 1179 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr; 1180 int cx_min, cx_max, linesize, x_incr, line, line1; 1181 uint32_t offset, fgcol, bgcol, v, cursor_offset; 1182 uint8_t *d1, *d, *src, *dest, *cursor_ptr; 1183 const uint8_t *font_ptr, *font_base[2]; 1184 int dup9, line_offset; 1185 uint32_t *palette; 1186 uint32_t *ch_attr_ptr; 1187 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1188 1189 /* compute font data address (in plane 2) */ 1190 v = sr(s, VGA_SEQ_CHARACTER_MAP); 1191 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; 1192 if (offset != s->font_offsets[0]) { 1193 s->font_offsets[0] = offset; 1194 full_update = 1; 1195 } 1196 font_base[0] = s->vram_ptr + offset; 1197 1198 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; 1199 font_base[1] = s->vram_ptr + offset; 1200 if (offset != s->font_offsets[1]) { 1201 s->font_offsets[1] = offset; 1202 full_update = 1; 1203 } 1204 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) { 1205 /* if the plane 2 was modified since the last display, it 1206 indicates the font may have been modified */ 1207 s->plane_updated = 0; 1208 full_update = 1; 1209 } 1210 full_update |= update_basic_params(s); 1211 1212 line_offset = s->line_offset; 1213 1214 vga_get_text_resolution(s, &width, &height, &cw, &cheight); 1215 if ((height * width) <= 1) { 1216 /* better than nothing: exit if transient size is too small */ 1217 return; 1218 } 1219 if ((height * width) > CH_ATTR_SIZE) { 1220 /* better than nothing: exit if transient size is too big */ 1221 return; 1222 } 1223 1224 if (width != s->last_width || height != s->last_height || 1225 cw != s->last_cw || cheight != s->last_ch || s->last_depth) { 1226 s->last_scr_width = width * cw; 1227 s->last_scr_height = height * cheight; 1228 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1229 surface = qemu_console_surface(s->con); 1230 dpy_text_resize(s->con, width, height); 1231 s->last_depth = 0; 1232 s->last_width = width; 1233 s->last_height = height; 1234 s->last_ch = cheight; 1235 s->last_cw = cw; 1236 full_update = 1; 1237 } 1238 full_update |= update_palette16(s); 1239 palette = s->last_palette; 1240 x_incr = cw * surface_bytes_per_pixel(surface); 1241 1242 if (full_update) { 1243 s->full_update_text = 1; 1244 } 1245 if (s->full_update_gfx) { 1246 s->full_update_gfx = 0; 1247 full_update |= 1; 1248 } 1249 1250 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1251 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; 1252 if (cursor_offset != s->cursor_offset || 1253 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1254 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) { 1255 /* if the cursor position changed, we update the old and new 1256 chars */ 1257 if (s->cursor_offset < CH_ATTR_SIZE) 1258 s->last_ch_attr[s->cursor_offset] = -1; 1259 if (cursor_offset < CH_ATTR_SIZE) 1260 s->last_ch_attr[cursor_offset] = -1; 1261 s->cursor_offset = cursor_offset; 1262 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1263 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1264 } 1265 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4; 1266 if (now >= s->cursor_blink_time) { 1267 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2; 1268 s->cursor_visible_phase = !s->cursor_visible_phase; 1269 } 1270 1271 dest = surface_data(surface); 1272 linesize = surface_stride(surface); 1273 ch_attr_ptr = s->last_ch_attr; 1274 line = 0; 1275 offset = s->start_addr * 4; 1276 for(cy = 0; cy < height; cy++) { 1277 d1 = dest; 1278 src = s->vram_ptr + offset; 1279 cx_min = width; 1280 cx_max = -1; 1281 for(cx = 0; cx < width; cx++) { 1282 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) { 1283 break; 1284 } 1285 ch_attr = *(uint16_t *)src; 1286 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) { 1287 if (cx < cx_min) 1288 cx_min = cx; 1289 if (cx > cx_max) 1290 cx_max = cx; 1291 *ch_attr_ptr = ch_attr; 1292 #ifdef HOST_WORDS_BIGENDIAN 1293 ch = ch_attr >> 8; 1294 cattr = ch_attr & 0xff; 1295 #else 1296 ch = ch_attr & 0xff; 1297 cattr = ch_attr >> 8; 1298 #endif 1299 font_ptr = font_base[(cattr >> 3) & 1]; 1300 font_ptr += 32 * 4 * ch; 1301 bgcol = palette[cattr >> 4]; 1302 fgcol = palette[cattr & 0x0f]; 1303 if (cw == 16) { 1304 vga_draw_glyph16(d1, linesize, 1305 font_ptr, cheight, fgcol, bgcol); 1306 } else if (cw != 9) { 1307 vga_draw_glyph8(d1, linesize, 1308 font_ptr, cheight, fgcol, bgcol); 1309 } else { 1310 dup9 = 0; 1311 if (ch >= 0xb0 && ch <= 0xdf && 1312 (s->ar[VGA_ATC_MODE] & 0x04)) { 1313 dup9 = 1; 1314 } 1315 vga_draw_glyph9(d1, linesize, 1316 font_ptr, cheight, fgcol, bgcol, dup9); 1317 } 1318 if (src == cursor_ptr && 1319 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) && 1320 s->cursor_visible_phase) { 1321 int line_start, line_last, h; 1322 /* draw the cursor */ 1323 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f; 1324 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f; 1325 /* XXX: check that */ 1326 if (line_last > cheight - 1) 1327 line_last = cheight - 1; 1328 if (line_last >= line_start && line_start < cheight) { 1329 h = line_last - line_start + 1; 1330 d = d1 + linesize * line_start; 1331 if (cw == 16) { 1332 vga_draw_glyph16(d, linesize, 1333 cursor_glyph, h, fgcol, bgcol); 1334 } else if (cw != 9) { 1335 vga_draw_glyph8(d, linesize, 1336 cursor_glyph, h, fgcol, bgcol); 1337 } else { 1338 vga_draw_glyph9(d, linesize, 1339 cursor_glyph, h, fgcol, bgcol, 1); 1340 } 1341 } 1342 } 1343 } 1344 d1 += x_incr; 1345 src += 4; 1346 ch_attr_ptr++; 1347 } 1348 if (cx_max != -1) { 1349 dpy_gfx_update(s->con, cx_min * cw, cy * cheight, 1350 (cx_max - cx_min + 1) * cw, cheight); 1351 } 1352 dest += linesize * cheight; 1353 line1 = line + cheight; 1354 offset += line_offset; 1355 if (line < s->line_compare && line1 >= s->line_compare) { 1356 offset = 0; 1357 } 1358 line = line1; 1359 } 1360 } 1361 1362 enum { 1363 VGA_DRAW_LINE2, 1364 VGA_DRAW_LINE2D2, 1365 VGA_DRAW_LINE4, 1366 VGA_DRAW_LINE4D2, 1367 VGA_DRAW_LINE8D2, 1368 VGA_DRAW_LINE8, 1369 VGA_DRAW_LINE15_LE, 1370 VGA_DRAW_LINE16_LE, 1371 VGA_DRAW_LINE24_LE, 1372 VGA_DRAW_LINE32_LE, 1373 VGA_DRAW_LINE15_BE, 1374 VGA_DRAW_LINE16_BE, 1375 VGA_DRAW_LINE24_BE, 1376 VGA_DRAW_LINE32_BE, 1377 VGA_DRAW_LINE_NB, 1378 }; 1379 1380 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = { 1381 vga_draw_line2, 1382 vga_draw_line2d2, 1383 vga_draw_line4, 1384 vga_draw_line4d2, 1385 vga_draw_line8d2, 1386 vga_draw_line8, 1387 vga_draw_line15_le, 1388 vga_draw_line16_le, 1389 vga_draw_line24_le, 1390 vga_draw_line32_le, 1391 vga_draw_line15_be, 1392 vga_draw_line16_be, 1393 vga_draw_line24_be, 1394 vga_draw_line32_be, 1395 }; 1396 1397 static int vga_get_bpp(VGACommonState *s) 1398 { 1399 int ret; 1400 1401 if (vbe_enabled(s)) { 1402 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP]; 1403 } else { 1404 ret = 0; 1405 } 1406 return ret; 1407 } 1408 1409 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight) 1410 { 1411 int width, height; 1412 1413 if (vbe_enabled(s)) { 1414 width = s->vbe_regs[VBE_DISPI_INDEX_XRES]; 1415 height = s->vbe_regs[VBE_DISPI_INDEX_YRES]; 1416 } else { 1417 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8; 1418 height = s->cr[VGA_CRTC_V_DISP_END] | 1419 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1420 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1421 height = (height + 1); 1422 } 1423 *pwidth = width; 1424 *pheight = height; 1425 } 1426 1427 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2) 1428 { 1429 int y; 1430 if (y1 >= VGA_MAX_HEIGHT) 1431 return; 1432 if (y2 >= VGA_MAX_HEIGHT) 1433 y2 = VGA_MAX_HEIGHT; 1434 for(y = y1; y < y2; y++) { 1435 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f); 1436 } 1437 } 1438 1439 static bool vga_scanline_invalidated(VGACommonState *s, int y) 1440 { 1441 if (y >= VGA_MAX_HEIGHT) { 1442 return false; 1443 } 1444 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f)); 1445 } 1446 1447 void vga_dirty_log_start(VGACommonState *s) 1448 { 1449 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA); 1450 } 1451 1452 void vga_dirty_log_stop(VGACommonState *s) 1453 { 1454 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA); 1455 } 1456 1457 /* 1458 * graphic modes 1459 */ 1460 static void vga_draw_graphic(VGACommonState *s, int full_update) 1461 { 1462 DisplaySurface *surface = qemu_console_surface(s->con); 1463 int y1, y, update, linesize, y_start, double_scan, mask, depth; 1464 int width, height, shift_control, bwidth, bits; 1465 ram_addr_t page0, page1, region_start, region_end; 1466 DirtyBitmapSnapshot *snap = NULL; 1467 int disp_width, multi_scan, multi_run; 1468 uint8_t *d; 1469 uint32_t v, addr1, addr; 1470 vga_draw_line_func *vga_draw_line = NULL; 1471 bool share_surface, force_shadow = false; 1472 pixman_format_code_t format; 1473 #ifdef HOST_WORDS_BIGENDIAN 1474 bool byteswap = !s->big_endian_fb; 1475 #else 1476 bool byteswap = s->big_endian_fb; 1477 #endif 1478 1479 full_update |= update_basic_params(s); 1480 1481 s->get_resolution(s, &width, &height); 1482 disp_width = width; 1483 1484 region_start = (s->start_addr * 4); 1485 region_end = region_start + (ram_addr_t)s->line_offset * height; 1486 region_end += width * s->get_bpp(s) / 8; /* scanline length */ 1487 region_end -= s->line_offset; 1488 if (region_end > s->vbe_size) { 1489 /* wraps around (can happen with cirrus vbe modes) */ 1490 region_start = 0; 1491 region_end = s->vbe_size; 1492 force_shadow = true; 1493 } 1494 1495 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3; 1496 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7); 1497 if (shift_control != 1) { 1498 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan) 1499 - 1; 1500 } else { 1501 /* in CGA modes, multi_scan is ignored */ 1502 /* XXX: is it correct ? */ 1503 multi_scan = double_scan; 1504 } 1505 multi_run = multi_scan; 1506 if (shift_control != s->shift_control || 1507 double_scan != s->double_scan) { 1508 full_update = 1; 1509 s->shift_control = shift_control; 1510 s->double_scan = double_scan; 1511 } 1512 1513 if (shift_control == 0) { 1514 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1515 disp_width <<= 1; 1516 } 1517 } else if (shift_control == 1) { 1518 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1519 disp_width <<= 1; 1520 } 1521 } 1522 1523 depth = s->get_bpp(s); 1524 1525 /* 1526 * Check whether we can share the surface with the backend 1527 * or whether we need a shadow surface. We share native 1528 * endian surfaces for 15bpp and above and byteswapped 1529 * surfaces for 24bpp and above. 1530 */ 1531 format = qemu_default_pixman_format(depth, !byteswap); 1532 if (format) { 1533 share_surface = dpy_gfx_check_format(s->con, format) 1534 && !s->force_shadow && !force_shadow; 1535 } else { 1536 share_surface = false; 1537 } 1538 if (s->line_offset != s->last_line_offset || 1539 disp_width != s->last_width || 1540 height != s->last_height || 1541 s->last_depth != depth || 1542 s->last_byteswap != byteswap || 1543 share_surface != is_buffer_shared(surface)) { 1544 if (share_surface) { 1545 surface = qemu_create_displaysurface_from(disp_width, 1546 height, format, s->line_offset, 1547 s->vram_ptr + (s->start_addr * 4)); 1548 dpy_gfx_replace_surface(s->con, surface); 1549 } else { 1550 qemu_console_resize(s->con, disp_width, height); 1551 surface = qemu_console_surface(s->con); 1552 } 1553 s->last_scr_width = disp_width; 1554 s->last_scr_height = height; 1555 s->last_width = disp_width; 1556 s->last_height = height; 1557 s->last_line_offset = s->line_offset; 1558 s->last_depth = depth; 1559 s->last_byteswap = byteswap; 1560 full_update = 1; 1561 } else if (is_buffer_shared(surface) && 1562 (full_update || surface_data(surface) != s->vram_ptr 1563 + (s->start_addr * 4))) { 1564 pixman_format_code_t format = 1565 qemu_default_pixman_format(depth, !byteswap); 1566 surface = qemu_create_displaysurface_from(disp_width, 1567 height, format, s->line_offset, 1568 s->vram_ptr + (s->start_addr * 4)); 1569 dpy_gfx_replace_surface(s->con, surface); 1570 } 1571 1572 if (shift_control == 0) { 1573 full_update |= update_palette16(s); 1574 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1575 v = VGA_DRAW_LINE4D2; 1576 } else { 1577 v = VGA_DRAW_LINE4; 1578 } 1579 bits = 4; 1580 } else if (shift_control == 1) { 1581 full_update |= update_palette16(s); 1582 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1583 v = VGA_DRAW_LINE2D2; 1584 } else { 1585 v = VGA_DRAW_LINE2; 1586 } 1587 bits = 4; 1588 } else { 1589 switch(s->get_bpp(s)) { 1590 default: 1591 case 0: 1592 full_update |= update_palette256(s); 1593 v = VGA_DRAW_LINE8D2; 1594 bits = 4; 1595 break; 1596 case 8: 1597 full_update |= update_palette256(s); 1598 v = VGA_DRAW_LINE8; 1599 bits = 8; 1600 break; 1601 case 15: 1602 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE; 1603 bits = 16; 1604 break; 1605 case 16: 1606 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE; 1607 bits = 16; 1608 break; 1609 case 24: 1610 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE; 1611 bits = 24; 1612 break; 1613 case 32: 1614 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE; 1615 bits = 32; 1616 break; 1617 } 1618 } 1619 vga_draw_line = vga_draw_line_table[v]; 1620 1621 if (!is_buffer_shared(surface) && s->cursor_invalidate) { 1622 s->cursor_invalidate(s); 1623 } 1624 1625 #if 0 1626 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", 1627 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE], 1628 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE)); 1629 #endif 1630 addr1 = (s->start_addr * 4); 1631 bwidth = DIV_ROUND_UP(width * bits, 8); 1632 y_start = -1; 1633 d = surface_data(surface); 1634 linesize = surface_stride(surface); 1635 y1 = 0; 1636 1637 if (!full_update) { 1638 if (s->line_compare < height) { 1639 /* split screen mode */ 1640 region_start = 0; 1641 } 1642 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start, 1643 region_end - region_start, 1644 DIRTY_MEMORY_VGA); 1645 } 1646 1647 for(y = 0; y < height; y++) { 1648 addr = addr1; 1649 if (!(s->cr[VGA_CRTC_MODE] & 1)) { 1650 int shift; 1651 /* CGA compatibility handling */ 1652 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1); 1653 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); 1654 } 1655 if (!(s->cr[VGA_CRTC_MODE] & 2)) { 1656 addr = (addr & ~0x8000) | ((y1 & 2) << 14); 1657 } 1658 update = full_update; 1659 page0 = addr & s->vbe_size_mask; 1660 page1 = (addr + bwidth - 1) & s->vbe_size_mask; 1661 if (full_update) { 1662 update = 1; 1663 } else if (page1 < page0) { 1664 /* scanline wraps from end of video memory to the start */ 1665 assert(force_shadow); 1666 update = memory_region_snapshot_get_dirty(&s->vram, snap, 1667 page0, s->vbe_size - page0); 1668 update |= memory_region_snapshot_get_dirty(&s->vram, snap, 1669 0, page1); 1670 } else { 1671 update = memory_region_snapshot_get_dirty(&s->vram, snap, 1672 page0, page1 - page0); 1673 } 1674 /* explicit invalidation for the hardware cursor (cirrus only) */ 1675 update |= vga_scanline_invalidated(s, y); 1676 if (update) { 1677 if (y_start < 0) 1678 y_start = y; 1679 if (!(is_buffer_shared(surface))) { 1680 vga_draw_line(s, d, addr, width); 1681 if (s->cursor_draw_line) 1682 s->cursor_draw_line(s, d, y); 1683 } 1684 } else { 1685 if (y_start >= 0) { 1686 /* flush to display */ 1687 dpy_gfx_update(s->con, 0, y_start, 1688 disp_width, y - y_start); 1689 y_start = -1; 1690 } 1691 } 1692 if (!multi_run) { 1693 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3; 1694 if ((y1 & mask) == mask) 1695 addr1 += s->line_offset; 1696 y1++; 1697 multi_run = multi_scan; 1698 } else { 1699 multi_run--; 1700 } 1701 /* line compare acts on the displayed lines */ 1702 if (y == s->line_compare) 1703 addr1 = 0; 1704 d += linesize; 1705 } 1706 if (y_start >= 0) { 1707 /* flush to display */ 1708 dpy_gfx_update(s->con, 0, y_start, 1709 disp_width, y - y_start); 1710 } 1711 g_free(snap); 1712 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table)); 1713 } 1714 1715 static void vga_draw_blank(VGACommonState *s, int full_update) 1716 { 1717 DisplaySurface *surface = qemu_console_surface(s->con); 1718 int i, w; 1719 uint8_t *d; 1720 1721 if (!full_update) 1722 return; 1723 if (s->last_scr_width <= 0 || s->last_scr_height <= 0) 1724 return; 1725 1726 w = s->last_scr_width * surface_bytes_per_pixel(surface); 1727 d = surface_data(surface); 1728 for(i = 0; i < s->last_scr_height; i++) { 1729 memset(d, 0, w); 1730 d += surface_stride(surface); 1731 } 1732 dpy_gfx_update(s->con, 0, 0, 1733 s->last_scr_width, s->last_scr_height); 1734 } 1735 1736 #define GMODE_TEXT 0 1737 #define GMODE_GRAPH 1 1738 #define GMODE_BLANK 2 1739 1740 static void vga_update_display(void *opaque) 1741 { 1742 VGACommonState *s = opaque; 1743 DisplaySurface *surface = qemu_console_surface(s->con); 1744 int full_update, graphic_mode; 1745 1746 qemu_flush_coalesced_mmio_buffer(); 1747 1748 if (surface_bits_per_pixel(surface) == 0) { 1749 /* nothing to do */ 1750 } else { 1751 full_update = 0; 1752 if (!(s->ar_index & 0x20)) { 1753 graphic_mode = GMODE_BLANK; 1754 } else { 1755 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1756 } 1757 if (graphic_mode != s->graphic_mode) { 1758 s->graphic_mode = graphic_mode; 1759 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1760 full_update = 1; 1761 } 1762 switch(graphic_mode) { 1763 case GMODE_TEXT: 1764 vga_draw_text(s, full_update); 1765 break; 1766 case GMODE_GRAPH: 1767 vga_draw_graphic(s, full_update); 1768 break; 1769 case GMODE_BLANK: 1770 default: 1771 vga_draw_blank(s, full_update); 1772 break; 1773 } 1774 } 1775 } 1776 1777 /* force a full display refresh */ 1778 static void vga_invalidate_display(void *opaque) 1779 { 1780 VGACommonState *s = opaque; 1781 1782 s->last_width = -1; 1783 s->last_height = -1; 1784 } 1785 1786 void vga_common_reset(VGACommonState *s) 1787 { 1788 s->sr_index = 0; 1789 memset(s->sr, '\0', sizeof(s->sr)); 1790 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe)); 1791 s->gr_index = 0; 1792 memset(s->gr, '\0', sizeof(s->gr)); 1793 s->ar_index = 0; 1794 memset(s->ar, '\0', sizeof(s->ar)); 1795 s->ar_flip_flop = 0; 1796 s->cr_index = 0; 1797 memset(s->cr, '\0', sizeof(s->cr)); 1798 s->msr = 0; 1799 s->fcr = 0; 1800 s->st00 = 0; 1801 s->st01 = 0; 1802 s->dac_state = 0; 1803 s->dac_sub_index = 0; 1804 s->dac_read_index = 0; 1805 s->dac_write_index = 0; 1806 memset(s->dac_cache, '\0', sizeof(s->dac_cache)); 1807 s->dac_8bit = 0; 1808 memset(s->palette, '\0', sizeof(s->palette)); 1809 s->bank_offset = 0; 1810 s->vbe_index = 0; 1811 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs)); 1812 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5; 1813 s->vbe_start_addr = 0; 1814 s->vbe_line_offset = 0; 1815 s->vbe_bank_mask = (s->vram_size >> 16) - 1; 1816 memset(s->font_offsets, '\0', sizeof(s->font_offsets)); 1817 s->graphic_mode = -1; /* force full update */ 1818 s->shift_control = 0; 1819 s->double_scan = 0; 1820 s->line_offset = 0; 1821 s->line_compare = 0; 1822 s->start_addr = 0; 1823 s->plane_updated = 0; 1824 s->last_cw = 0; 1825 s->last_ch = 0; 1826 s->last_width = 0; 1827 s->last_height = 0; 1828 s->last_scr_width = 0; 1829 s->last_scr_height = 0; 1830 s->cursor_start = 0; 1831 s->cursor_end = 0; 1832 s->cursor_offset = 0; 1833 s->big_endian_fb = s->default_endian_fb; 1834 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table)); 1835 memset(s->last_palette, '\0', sizeof(s->last_palette)); 1836 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr)); 1837 switch (vga_retrace_method) { 1838 case VGA_RETRACE_DUMB: 1839 break; 1840 case VGA_RETRACE_PRECISE: 1841 memset(&s->retrace_info, 0, sizeof (s->retrace_info)); 1842 break; 1843 } 1844 vga_update_memory_access(s); 1845 } 1846 1847 static void vga_reset(void *opaque) 1848 { 1849 VGACommonState *s = opaque; 1850 vga_common_reset(s); 1851 } 1852 1853 #define TEXTMODE_X(x) ((x) % width) 1854 #define TEXTMODE_Y(x) ((x) / width) 1855 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \ 1856 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1)) 1857 /* relay text rendering to the display driver 1858 * instead of doing a full vga_update_display() */ 1859 static void vga_update_text(void *opaque, console_ch_t *chardata) 1860 { 1861 VGACommonState *s = opaque; 1862 int graphic_mode, i, cursor_offset, cursor_visible; 1863 int cw, cheight, width, height, size, c_min, c_max; 1864 uint32_t *src; 1865 console_ch_t *dst, val; 1866 char msg_buffer[80]; 1867 int full_update = 0; 1868 1869 qemu_flush_coalesced_mmio_buffer(); 1870 1871 if (!(s->ar_index & 0x20)) { 1872 graphic_mode = GMODE_BLANK; 1873 } else { 1874 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1875 } 1876 if (graphic_mode != s->graphic_mode) { 1877 s->graphic_mode = graphic_mode; 1878 full_update = 1; 1879 } 1880 if (s->last_width == -1) { 1881 s->last_width = 0; 1882 full_update = 1; 1883 } 1884 1885 switch (graphic_mode) { 1886 case GMODE_TEXT: 1887 /* TODO: update palette */ 1888 full_update |= update_basic_params(s); 1889 1890 /* total width & height */ 1891 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1892 cw = 8; 1893 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { 1894 cw = 9; 1895 } 1896 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { 1897 cw = 16; /* NOTE: no 18 pixel wide */ 1898 } 1899 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1900 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1901 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1902 height = 100; 1903 } else { 1904 height = s->cr[VGA_CRTC_V_DISP_END] | 1905 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1906 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1907 height = (height + 1) / cheight; 1908 } 1909 1910 size = (height * width); 1911 if (size > CH_ATTR_SIZE) { 1912 if (!full_update) 1913 return; 1914 1915 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode", 1916 width, height); 1917 break; 1918 } 1919 1920 if (width != s->last_width || height != s->last_height || 1921 cw != s->last_cw || cheight != s->last_ch) { 1922 s->last_scr_width = width * cw; 1923 s->last_scr_height = height * cheight; 1924 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1925 dpy_text_resize(s->con, width, height); 1926 s->last_depth = 0; 1927 s->last_width = width; 1928 s->last_height = height; 1929 s->last_ch = cheight; 1930 s->last_cw = cw; 1931 full_update = 1; 1932 } 1933 1934 if (full_update) { 1935 s->full_update_gfx = 1; 1936 } 1937 if (s->full_update_text) { 1938 s->full_update_text = 0; 1939 full_update |= 1; 1940 } 1941 1942 /* Update "hardware" cursor */ 1943 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1944 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; 1945 if (cursor_offset != s->cursor_offset || 1946 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1947 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) { 1948 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20); 1949 if (cursor_visible && cursor_offset < size && cursor_offset >= 0) 1950 dpy_text_cursor(s->con, 1951 TEXTMODE_X(cursor_offset), 1952 TEXTMODE_Y(cursor_offset)); 1953 else 1954 dpy_text_cursor(s->con, -1, -1); 1955 s->cursor_offset = cursor_offset; 1956 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1957 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1958 } 1959 1960 src = (uint32_t *) s->vram_ptr + s->start_addr; 1961 dst = chardata; 1962 1963 if (full_update) { 1964 for (i = 0; i < size; src ++, dst ++, i ++) 1965 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src))); 1966 1967 dpy_text_update(s->con, 0, 0, width, height); 1968 } else { 1969 c_max = 0; 1970 1971 for (i = 0; i < size; src ++, dst ++, i ++) { 1972 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 1973 if (*dst != val) { 1974 *dst = val; 1975 c_max = i; 1976 break; 1977 } 1978 } 1979 c_min = i; 1980 for (; i < size; src ++, dst ++, i ++) { 1981 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 1982 if (*dst != val) { 1983 *dst = val; 1984 c_max = i; 1985 } 1986 } 1987 1988 if (c_min <= c_max) { 1989 i = TEXTMODE_Y(c_min); 1990 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1); 1991 } 1992 } 1993 1994 return; 1995 case GMODE_GRAPH: 1996 if (!full_update) 1997 return; 1998 1999 s->get_resolution(s, &width, &height); 2000 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode", 2001 width, height); 2002 break; 2003 case GMODE_BLANK: 2004 default: 2005 if (!full_update) 2006 return; 2007 2008 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode"); 2009 break; 2010 } 2011 2012 /* Display a message */ 2013 s->last_width = 60; 2014 s->last_height = height = 3; 2015 dpy_text_cursor(s->con, -1, -1); 2016 dpy_text_resize(s->con, s->last_width, height); 2017 2018 for (dst = chardata, i = 0; i < s->last_width * height; i ++) 2019 console_write_ch(dst ++, ' '); 2020 2021 size = strlen(msg_buffer); 2022 width = (s->last_width - size) / 2; 2023 dst = chardata + s->last_width + width; 2024 for (i = 0; i < size; i ++) 2025 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE, 2026 QEMU_COLOR_BLACK, 1)); 2027 2028 dpy_text_update(s->con, 0, 0, s->last_width, height); 2029 } 2030 2031 static uint64_t vga_mem_read(void *opaque, hwaddr addr, 2032 unsigned size) 2033 { 2034 VGACommonState *s = opaque; 2035 2036 return vga_mem_readb(s, addr); 2037 } 2038 2039 static void vga_mem_write(void *opaque, hwaddr addr, 2040 uint64_t data, unsigned size) 2041 { 2042 VGACommonState *s = opaque; 2043 2044 vga_mem_writeb(s, addr, data); 2045 } 2046 2047 const MemoryRegionOps vga_mem_ops = { 2048 .read = vga_mem_read, 2049 .write = vga_mem_write, 2050 .endianness = DEVICE_LITTLE_ENDIAN, 2051 .impl = { 2052 .min_access_size = 1, 2053 .max_access_size = 1, 2054 }, 2055 }; 2056 2057 static int vga_common_post_load(void *opaque, int version_id) 2058 { 2059 VGACommonState *s = opaque; 2060 2061 /* force refresh */ 2062 s->graphic_mode = -1; 2063 vbe_update_vgaregs(s); 2064 vga_update_memory_access(s); 2065 return 0; 2066 } 2067 2068 static bool vga_endian_state_needed(void *opaque) 2069 { 2070 VGACommonState *s = opaque; 2071 2072 /* 2073 * Only send the endian state if it's different from the 2074 * default one, thus ensuring backward compatibility for 2075 * migration of the common case 2076 */ 2077 return s->default_endian_fb != s->big_endian_fb; 2078 } 2079 2080 static const VMStateDescription vmstate_vga_endian = { 2081 .name = "vga.endian", 2082 .version_id = 1, 2083 .minimum_version_id = 1, 2084 .needed = vga_endian_state_needed, 2085 .fields = (VMStateField[]) { 2086 VMSTATE_BOOL(big_endian_fb, VGACommonState), 2087 VMSTATE_END_OF_LIST() 2088 } 2089 }; 2090 2091 const VMStateDescription vmstate_vga_common = { 2092 .name = "vga", 2093 .version_id = 2, 2094 .minimum_version_id = 2, 2095 .post_load = vga_common_post_load, 2096 .fields = (VMStateField[]) { 2097 VMSTATE_UINT32(latch, VGACommonState), 2098 VMSTATE_UINT8(sr_index, VGACommonState), 2099 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8), 2100 VMSTATE_UINT8(gr_index, VGACommonState), 2101 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16), 2102 VMSTATE_UINT8(ar_index, VGACommonState), 2103 VMSTATE_BUFFER(ar, VGACommonState), 2104 VMSTATE_INT32(ar_flip_flop, VGACommonState), 2105 VMSTATE_UINT8(cr_index, VGACommonState), 2106 VMSTATE_BUFFER(cr, VGACommonState), 2107 VMSTATE_UINT8(msr, VGACommonState), 2108 VMSTATE_UINT8(fcr, VGACommonState), 2109 VMSTATE_UINT8(st00, VGACommonState), 2110 VMSTATE_UINT8(st01, VGACommonState), 2111 2112 VMSTATE_UINT8(dac_state, VGACommonState), 2113 VMSTATE_UINT8(dac_sub_index, VGACommonState), 2114 VMSTATE_UINT8(dac_read_index, VGACommonState), 2115 VMSTATE_UINT8(dac_write_index, VGACommonState), 2116 VMSTATE_BUFFER(dac_cache, VGACommonState), 2117 VMSTATE_BUFFER(palette, VGACommonState), 2118 2119 VMSTATE_INT32(bank_offset, VGACommonState), 2120 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL), 2121 VMSTATE_UINT16(vbe_index, VGACommonState), 2122 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB), 2123 VMSTATE_UINT32(vbe_start_addr, VGACommonState), 2124 VMSTATE_UINT32(vbe_line_offset, VGACommonState), 2125 VMSTATE_UINT32(vbe_bank_mask, VGACommonState), 2126 VMSTATE_END_OF_LIST() 2127 }, 2128 .subsections = (const VMStateDescription*[]) { 2129 &vmstate_vga_endian, 2130 NULL 2131 } 2132 }; 2133 2134 static const GraphicHwOps vga_ops = { 2135 .invalidate = vga_invalidate_display, 2136 .gfx_update = vga_update_display, 2137 .text_update = vga_update_text, 2138 }; 2139 2140 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax) 2141 { 2142 if (val < vmin) { 2143 return vmin; 2144 } 2145 if (val > vmax) { 2146 return vmax; 2147 } 2148 return val; 2149 } 2150 2151 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate) 2152 { 2153 int i, j, v, b; 2154 2155 for(i = 0;i < 256; i++) { 2156 v = 0; 2157 for(j = 0; j < 8; j++) { 2158 v |= ((i >> j) & 1) << (j * 4); 2159 } 2160 expand4[i] = v; 2161 2162 v = 0; 2163 for(j = 0; j < 4; j++) { 2164 v |= ((i >> (2 * j)) & 3) << (j * 4); 2165 } 2166 expand2[i] = v; 2167 } 2168 for(i = 0; i < 16; i++) { 2169 v = 0; 2170 for(j = 0; j < 4; j++) { 2171 b = ((i >> j) & 1); 2172 v |= b << (2 * j); 2173 v |= b << (2 * j + 1); 2174 } 2175 expand4to8[i] = v; 2176 } 2177 2178 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512); 2179 s->vram_size_mb = pow2ceil(s->vram_size_mb); 2180 s->vram_size = s->vram_size_mb << 20; 2181 2182 if (!s->vbe_size) { 2183 s->vbe_size = s->vram_size; 2184 } 2185 s->vbe_size_mask = s->vbe_size - 1; 2186 2187 s->is_vbe_vmstate = 1; 2188 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size, 2189 &error_fatal); 2190 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj)); 2191 xen_register_framebuffer(&s->vram); 2192 s->vram_ptr = memory_region_get_ram_ptr(&s->vram); 2193 s->get_bpp = vga_get_bpp; 2194 s->get_offsets = vga_get_offsets; 2195 s->get_resolution = vga_get_resolution; 2196 s->hw_ops = &vga_ops; 2197 switch (vga_retrace_method) { 2198 case VGA_RETRACE_DUMB: 2199 s->retrace = vga_dumb_retrace; 2200 s->update_retrace_info = vga_dumb_update_retrace_info; 2201 break; 2202 2203 case VGA_RETRACE_PRECISE: 2204 s->retrace = vga_precise_retrace; 2205 s->update_retrace_info = vga_precise_update_retrace_info; 2206 break; 2207 } 2208 2209 /* 2210 * Set default fb endian based on target, could probably be turned 2211 * into a device attribute set by the machine/platform to remove 2212 * all target endian dependencies from this file. 2213 */ 2214 #ifdef TARGET_WORDS_BIGENDIAN 2215 s->default_endian_fb = true; 2216 #else 2217 s->default_endian_fb = false; 2218 #endif 2219 vga_dirty_log_start(s); 2220 } 2221 2222 static const MemoryRegionPortio vga_portio_list[] = { 2223 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */ 2224 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */ 2225 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */ 2226 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */ 2227 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */ 2228 PORTIO_END_OF_LIST(), 2229 }; 2230 2231 static const MemoryRegionPortio vbe_portio_list[] = { 2232 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index }, 2233 # ifdef TARGET_I386 2234 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2235 # endif 2236 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2237 PORTIO_END_OF_LIST(), 2238 }; 2239 2240 /* Used by both ISA and PCI */ 2241 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj, 2242 const MemoryRegionPortio **vga_ports, 2243 const MemoryRegionPortio **vbe_ports) 2244 { 2245 MemoryRegion *vga_mem; 2246 2247 *vga_ports = vga_portio_list; 2248 *vbe_ports = vbe_portio_list; 2249 2250 vga_mem = g_malloc(sizeof(*vga_mem)); 2251 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s, 2252 "vga-lowmem", 0x20000); 2253 memory_region_set_flush_coalesced(vga_mem); 2254 2255 return vga_mem; 2256 } 2257 2258 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space, 2259 MemoryRegion *address_space_io, bool init_vga_ports) 2260 { 2261 MemoryRegion *vga_io_memory; 2262 const MemoryRegionPortio *vga_ports, *vbe_ports; 2263 2264 qemu_register_reset(vga_reset, s); 2265 2266 s->bank_offset = 0; 2267 2268 s->legacy_address_space = address_space; 2269 2270 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports); 2271 memory_region_add_subregion_overlap(address_space, 2272 0x000a0000, 2273 vga_io_memory, 2274 1); 2275 memory_region_set_coalescing(vga_io_memory); 2276 if (init_vga_ports) { 2277 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga"); 2278 portio_list_set_flush_coalesced(&s->vga_port_list); 2279 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0); 2280 } 2281 if (vbe_ports) { 2282 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe"); 2283 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce); 2284 } 2285 } 2286 2287 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory) 2288 { 2289 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region, 2290 * so use an alias to avoid double-mapping the same region. 2291 */ 2292 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe", 2293 &s->vram, 0, memory_region_size(&s->vram)); 2294 /* XXX: use optimized standard vga accesses */ 2295 memory_region_add_subregion(system_memory, 2296 VBE_DISPI_LFB_PHYSICAL_ADDRESS, 2297 &s->vram_vbe); 2298 s->vbe_mapped = 1; 2299 } 2300