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 25 #include "qemu/osdep.h" 26 #include "qemu/units.h" 27 #include "sysemu/reset.h" 28 #include "qapi/error.h" 29 #include "exec/tswap.h" 30 #include "hw/display/vga.h" 31 #include "hw/i386/x86.h" 32 #include "hw/pci/pci.h" 33 #include "vga_int.h" 34 #include "vga_regs.h" 35 #include "ui/pixel_ops.h" 36 #include "ui/console.h" 37 #include "qemu/timer.h" 38 #include "hw/xen/xen.h" 39 #include "migration/vmstate.h" 40 #include "trace.h" 41 42 //#define DEBUG_VGA_MEM 43 //#define DEBUG_VGA_REG 44 45 bool have_vga = true; 46 47 /* 16 state changes per vertical frame @60 Hz */ 48 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) 49 50 /* Address mask for non-VESA modes. */ 51 #define VGA_VRAM_SIZE (256 * KiB) 52 53 /* This value corresponds to a shift of zero pixels 54 * in 9-dot text mode. In other modes, bit 3 is undefined; 55 * we just ignore it, so that 8 corresponds to zero pixels 56 * in all modes. 57 */ 58 #define VGA_HPEL_NEUTRAL 8 59 60 /* 61 * Video Graphics Array (VGA) 62 * 63 * Chipset docs for original IBM VGA: 64 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf 65 * 66 * FreeVGA site: 67 * http://www.osdever.net/FreeVGA/home.htm 68 * 69 * Standard VGA features and Bochs VBE extensions are implemented. 70 */ 71 72 /* force some bits to zero */ 73 const uint8_t sr_mask[8] = { 74 0x03, 75 0x3d, 76 0x0f, 77 0x3f, 78 0x0e, 79 0x00, 80 0x00, 81 0xff, 82 }; 83 84 const uint8_t gr_mask[16] = { 85 0x0f, /* 0x00 */ 86 0x0f, /* 0x01 */ 87 0x0f, /* 0x02 */ 88 0x1f, /* 0x03 */ 89 0x03, /* 0x04 */ 90 0x7b, /* 0x05 */ 91 0x0f, /* 0x06 */ 92 0x0f, /* 0x07 */ 93 0xff, /* 0x08 */ 94 0x00, /* 0x09 */ 95 0x00, /* 0x0a */ 96 0x00, /* 0x0b */ 97 0x00, /* 0x0c */ 98 0x00, /* 0x0d */ 99 0x00, /* 0x0e */ 100 0x00, /* 0x0f */ 101 }; 102 103 #define GET_PLANE(data, p) ((cpu_to_le32(data) >> ((p) * 8)) & 0xff) 104 105 static const uint32_t mask16[16] = { 106 const_le32(0x00000000), 107 const_le32(0x000000ff), 108 const_le32(0x0000ff00), 109 const_le32(0x0000ffff), 110 const_le32(0x00ff0000), 111 const_le32(0x00ff00ff), 112 const_le32(0x00ffff00), 113 const_le32(0x00ffffff), 114 const_le32(0xff000000), 115 const_le32(0xff0000ff), 116 const_le32(0xff00ff00), 117 const_le32(0xff00ffff), 118 const_le32(0xffff0000), 119 const_le32(0xffff00ff), 120 const_le32(0xffffff00), 121 const_le32(0xffffffff), 122 }; 123 124 static uint32_t expand4[256]; 125 static uint16_t expand2[256]; 126 static uint8_t expand4to8[16]; 127 128 static void vbe_update_vgaregs(VGACommonState *s); 129 130 static inline bool vbe_enabled(VGACommonState *s) 131 { 132 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED; 133 } 134 135 static inline uint8_t sr(VGACommonState *s, int idx) 136 { 137 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx]; 138 } 139 140 static void vga_update_memory_access(VGACommonState *s) 141 { 142 hwaddr base, offset, size; 143 144 if (s->legacy_address_space == NULL) { 145 return; 146 } 147 148 if (s->has_chain4_alias) { 149 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias); 150 object_unparent(OBJECT(&s->chain4_alias)); 151 s->has_chain4_alias = false; 152 s->plane_updated = 0xf; 153 } 154 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) == 155 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 156 offset = 0; 157 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) { 158 case 0: 159 base = 0xa0000; 160 size = 0x20000; 161 break; 162 case 1: 163 base = 0xa0000; 164 size = 0x10000; 165 offset = s->bank_offset; 166 break; 167 case 2: 168 base = 0xb0000; 169 size = 0x8000; 170 break; 171 case 3: 172 default: 173 base = 0xb8000; 174 size = 0x8000; 175 break; 176 } 177 assert(offset + size <= s->vram_size); 178 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram), 179 "vga.chain4", &s->vram, offset, size); 180 memory_region_add_subregion_overlap(s->legacy_address_space, base, 181 &s->chain4_alias, 2); 182 s->has_chain4_alias = true; 183 } 184 } 185 186 static void vga_dumb_update_retrace_info(VGACommonState *s) 187 { 188 (void) s; 189 } 190 191 static void vga_precise_update_retrace_info(VGACommonState *s) 192 { 193 int htotal_chars; 194 int hretr_start_char; 195 int hretr_skew_chars; 196 int hretr_end_char; 197 198 int vtotal_lines; 199 int vretr_start_line; 200 int vretr_end_line; 201 202 int dots; 203 #if 0 204 int div2, sldiv2; 205 #endif 206 int clocking_mode; 207 int clock_sel; 208 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000}; 209 int64_t chars_per_sec; 210 struct vga_precise_retrace *r = &s->retrace_info.precise; 211 212 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5; 213 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START]; 214 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3; 215 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f; 216 217 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] | 218 (((s->cr[VGA_CRTC_OVERFLOW] & 1) | 219 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2; 220 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] | 221 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) | 222 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8); 223 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf; 224 225 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1; 226 clock_sel = (s->msr >> 2) & 3; 227 dots = (s->msr & 1) ? 8 : 9; 228 229 chars_per_sec = clk_hz[clock_sel] / dots; 230 231 htotal_chars <<= clocking_mode; 232 233 r->total_chars = vtotal_lines * htotal_chars; 234 if (r->freq) { 235 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq); 236 } else { 237 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec; 238 } 239 240 r->vstart = vretr_start_line; 241 r->vend = r->vstart + vretr_end_line + 1; 242 243 r->hstart = hretr_start_char + hretr_skew_chars; 244 r->hend = r->hstart + hretr_end_char + 1; 245 r->htotal = htotal_chars; 246 247 #if 0 248 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1; 249 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1; 250 printf ( 251 "hz=%f\n" 252 "htotal = %d\n" 253 "hretr_start = %d\n" 254 "hretr_skew = %d\n" 255 "hretr_end = %d\n" 256 "vtotal = %d\n" 257 "vretr_start = %d\n" 258 "vretr_end = %d\n" 259 "div2 = %d sldiv2 = %d\n" 260 "clocking_mode = %d\n" 261 "clock_sel = %d %d\n" 262 "dots = %d\n" 263 "ticks/char = %" PRId64 "\n" 264 "\n", 265 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars), 266 htotal_chars, 267 hretr_start_char, 268 hretr_skew_chars, 269 hretr_end_char, 270 vtotal_lines, 271 vretr_start_line, 272 vretr_end_line, 273 div2, sldiv2, 274 clocking_mode, 275 clock_sel, 276 clk_hz[clock_sel], 277 dots, 278 r->ticks_per_char 279 ); 280 #endif 281 } 282 283 static uint8_t vga_precise_retrace(VGACommonState *s) 284 { 285 struct vga_precise_retrace *r = &s->retrace_info.precise; 286 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE); 287 288 if (r->total_chars) { 289 int cur_line, cur_line_char, cur_char; 290 int64_t cur_tick; 291 292 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 293 294 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars; 295 cur_line = cur_char / r->htotal; 296 297 if (cur_line >= r->vstart && cur_line <= r->vend) { 298 val |= ST01_V_RETRACE | ST01_DISP_ENABLE; 299 } else { 300 cur_line_char = cur_char % r->htotal; 301 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) { 302 val |= ST01_DISP_ENABLE; 303 } 304 } 305 306 return val; 307 } else { 308 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 309 } 310 } 311 312 static uint8_t vga_dumb_retrace(VGACommonState *s) 313 { 314 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); 315 } 316 317 int vga_ioport_invalid(VGACommonState *s, uint32_t addr) 318 { 319 if (s->msr & VGA_MIS_COLOR) { 320 /* Color */ 321 return (addr >= 0x3b0 && addr <= 0x3bf); 322 } else { 323 /* Monochrome */ 324 return (addr >= 0x3d0 && addr <= 0x3df); 325 } 326 } 327 328 uint32_t vga_ioport_read(void *opaque, uint32_t addr) 329 { 330 VGACommonState *s = opaque; 331 int val, index; 332 333 if (vga_ioport_invalid(s, addr)) { 334 val = 0xff; 335 } else { 336 switch(addr) { 337 case VGA_ATT_W: 338 if (s->ar_flip_flop == 0) { 339 val = s->ar_index; 340 } else { 341 val = 0; 342 } 343 break; 344 case VGA_ATT_R: 345 index = s->ar_index & 0x1f; 346 if (index < VGA_ATT_C) { 347 val = s->ar[index]; 348 } else { 349 val = 0; 350 } 351 break; 352 case VGA_MIS_W: 353 val = s->st00; 354 break; 355 case VGA_SEQ_I: 356 val = s->sr_index; 357 break; 358 case VGA_SEQ_D: 359 val = s->sr[s->sr_index]; 360 #ifdef DEBUG_VGA_REG 361 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); 362 #endif 363 break; 364 case VGA_PEL_IR: 365 val = s->dac_state; 366 break; 367 case VGA_PEL_IW: 368 val = s->dac_write_index; 369 break; 370 case VGA_PEL_D: 371 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index]; 372 if (++s->dac_sub_index == 3) { 373 s->dac_sub_index = 0; 374 s->dac_read_index++; 375 } 376 break; 377 case VGA_FTC_R: 378 val = s->fcr; 379 break; 380 case VGA_MIS_R: 381 val = s->msr; 382 break; 383 case VGA_GFX_I: 384 val = s->gr_index; 385 break; 386 case VGA_GFX_D: 387 val = s->gr[s->gr_index]; 388 #ifdef DEBUG_VGA_REG 389 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); 390 #endif 391 break; 392 case VGA_CRT_IM: 393 case VGA_CRT_IC: 394 val = s->cr_index; 395 break; 396 case VGA_CRT_DM: 397 case VGA_CRT_DC: 398 val = s->cr[s->cr_index]; 399 #ifdef DEBUG_VGA_REG 400 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); 401 #endif 402 break; 403 case VGA_IS1_RM: 404 case VGA_IS1_RC: 405 /* just toggle to fool polling */ 406 val = s->st01 = s->retrace(s); 407 s->ar_flip_flop = 0; 408 break; 409 default: 410 val = 0x00; 411 break; 412 } 413 } 414 trace_vga_std_read_io(addr, val); 415 return val; 416 } 417 418 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val) 419 { 420 VGACommonState *s = opaque; 421 int index; 422 423 /* check port range access depending on color/monochrome mode */ 424 if (vga_ioport_invalid(s, addr)) { 425 return; 426 } 427 trace_vga_std_write_io(addr, val); 428 429 switch(addr) { 430 case VGA_ATT_W: 431 if (s->ar_flip_flop == 0) { 432 val &= 0x3f; 433 s->ar_index = val; 434 } else { 435 index = s->ar_index & 0x1f; 436 switch(index) { 437 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF: 438 s->ar[index] = val & 0x3f; 439 break; 440 case VGA_ATC_MODE: 441 s->ar[index] = val & ~0x10; 442 break; 443 case VGA_ATC_OVERSCAN: 444 s->ar[index] = val; 445 break; 446 case VGA_ATC_PLANE_ENABLE: 447 s->ar[index] = val & ~0xc0; 448 break; 449 case VGA_ATC_PEL: 450 s->ar[index] = val & ~0xf0; 451 break; 452 case VGA_ATC_COLOR_PAGE: 453 s->ar[index] = val & ~0xf0; 454 break; 455 default: 456 break; 457 } 458 } 459 s->ar_flip_flop ^= 1; 460 break; 461 case VGA_MIS_W: 462 s->msr = val & ~0x10; 463 s->update_retrace_info(s); 464 break; 465 case VGA_SEQ_I: 466 s->sr_index = val & 7; 467 break; 468 case VGA_SEQ_D: 469 #ifdef DEBUG_VGA_REG 470 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); 471 #endif 472 s->sr[s->sr_index] = val & sr_mask[s->sr_index]; 473 if (s->sr_index == VGA_SEQ_CLOCK_MODE) { 474 s->update_retrace_info(s); 475 } 476 vga_update_memory_access(s); 477 break; 478 case VGA_PEL_IR: 479 s->dac_read_index = val; 480 s->dac_sub_index = 0; 481 s->dac_state = 3; 482 break; 483 case VGA_PEL_IW: 484 s->dac_write_index = val; 485 s->dac_sub_index = 0; 486 s->dac_state = 0; 487 break; 488 case VGA_PEL_D: 489 s->dac_cache[s->dac_sub_index] = val; 490 if (++s->dac_sub_index == 3) { 491 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); 492 s->dac_sub_index = 0; 493 s->dac_write_index++; 494 } 495 break; 496 case VGA_GFX_I: 497 s->gr_index = val & 0x0f; 498 break; 499 case VGA_GFX_D: 500 #ifdef DEBUG_VGA_REG 501 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); 502 #endif 503 s->gr[s->gr_index] = val & gr_mask[s->gr_index]; 504 vbe_update_vgaregs(s); 505 vga_update_memory_access(s); 506 break; 507 case VGA_CRT_IM: 508 case VGA_CRT_IC: 509 s->cr_index = val; 510 break; 511 case VGA_CRT_DM: 512 case VGA_CRT_DC: 513 #ifdef DEBUG_VGA_REG 514 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); 515 #endif 516 /* handle CR0-7 protection */ 517 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) && 518 s->cr_index <= VGA_CRTC_OVERFLOW) { 519 /* can always write bit 4 of CR7 */ 520 if (s->cr_index == VGA_CRTC_OVERFLOW) { 521 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | 522 (val & 0x10); 523 vbe_update_vgaregs(s); 524 } 525 return; 526 } 527 s->cr[s->cr_index] = val; 528 vbe_update_vgaregs(s); 529 530 switch(s->cr_index) { 531 case VGA_CRTC_H_TOTAL: 532 case VGA_CRTC_H_SYNC_START: 533 case VGA_CRTC_H_SYNC_END: 534 case VGA_CRTC_V_TOTAL: 535 case VGA_CRTC_OVERFLOW: 536 case VGA_CRTC_V_SYNC_END: 537 case VGA_CRTC_MODE: 538 s->update_retrace_info(s); 539 break; 540 } 541 break; 542 case VGA_IS1_RM: 543 case VGA_IS1_RC: 544 s->fcr = val & 0x10; 545 break; 546 } 547 } 548 549 /* 550 * Sanity check vbe register writes. 551 * 552 * As we don't have a way to signal errors to the guest in the bochs 553 * dispi interface we'll go adjust the registers to the closest valid 554 * value. 555 */ 556 static void vbe_fixup_regs(VGACommonState *s) 557 { 558 uint16_t *r = s->vbe_regs; 559 uint32_t bits, linelength, maxy, offset; 560 561 if (!vbe_enabled(s)) { 562 /* vbe is turned off -- nothing to do */ 563 return; 564 } 565 566 /* check depth */ 567 switch (r[VBE_DISPI_INDEX_BPP]) { 568 case 4: 569 case 8: 570 case 16: 571 case 24: 572 case 32: 573 bits = r[VBE_DISPI_INDEX_BPP]; 574 break; 575 case 15: 576 bits = 16; 577 break; 578 default: 579 bits = r[VBE_DISPI_INDEX_BPP] = 8; 580 break; 581 } 582 583 /* check width */ 584 r[VBE_DISPI_INDEX_XRES] &= ~7u; 585 if (r[VBE_DISPI_INDEX_XRES] == 0) { 586 r[VBE_DISPI_INDEX_XRES] = 8; 587 } 588 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) { 589 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES; 590 } 591 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u; 592 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) { 593 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES; 594 } 595 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) { 596 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES]; 597 } 598 599 /* check height */ 600 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8; 601 maxy = s->vbe_size / linelength; 602 if (r[VBE_DISPI_INDEX_YRES] == 0) { 603 r[VBE_DISPI_INDEX_YRES] = 1; 604 } 605 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) { 606 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES; 607 } 608 if (r[VBE_DISPI_INDEX_YRES] > maxy) { 609 r[VBE_DISPI_INDEX_YRES] = maxy; 610 } 611 612 /* check offset */ 613 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) { 614 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES; 615 } 616 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) { 617 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES; 618 } 619 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 620 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength; 621 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 622 r[VBE_DISPI_INDEX_Y_OFFSET] = 0; 623 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; 624 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { 625 r[VBE_DISPI_INDEX_X_OFFSET] = 0; 626 offset = 0; 627 } 628 } 629 630 /* update vga state */ 631 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy; 632 s->vbe_line_offset = linelength; 633 s->vbe_start_addr = offset / 4; 634 } 635 636 /* we initialize the VGA graphic mode */ 637 static void vbe_update_vgaregs(VGACommonState *s) 638 { 639 int h, shift_control; 640 641 if (!vbe_enabled(s)) { 642 /* vbe is turned off -- nothing to do */ 643 return; 644 } 645 646 /* graphic mode + memory map 1 */ 647 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 | 648 VGA_GR06_GRAPHICS_MODE; 649 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */ 650 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3; 651 /* width */ 652 s->cr[VGA_CRTC_H_DISP] = 653 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1; 654 /* height (only meaningful if < 1024) */ 655 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1; 656 s->cr[VGA_CRTC_V_DISP_END] = h; 657 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) | 658 ((h >> 7) & 0x02) | ((h >> 3) & 0x40); 659 /* line compare to 1023 */ 660 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff; 661 s->cr[VGA_CRTC_OVERFLOW] |= 0x10; 662 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40; 663 664 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) { 665 shift_control = 0; 666 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */ 667 } else { 668 shift_control = 2; 669 /* set chain 4 mode */ 670 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M; 671 /* activate all planes */ 672 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES; 673 } 674 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) | 675 (shift_control << 5); 676 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */ 677 } 678 679 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr) 680 { 681 VGACommonState *s = opaque; 682 return s->vbe_index; 683 } 684 685 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr) 686 { 687 VGACommonState *s = opaque; 688 uint32_t val; 689 690 if (s->vbe_index < VBE_DISPI_INDEX_NB) { 691 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) { 692 switch(s->vbe_index) { 693 /* XXX: do not hardcode ? */ 694 case VBE_DISPI_INDEX_XRES: 695 val = VBE_DISPI_MAX_XRES; 696 break; 697 case VBE_DISPI_INDEX_YRES: 698 val = VBE_DISPI_MAX_YRES; 699 break; 700 case VBE_DISPI_INDEX_BPP: 701 val = VBE_DISPI_MAX_BPP; 702 break; 703 default: 704 val = s->vbe_regs[s->vbe_index]; 705 break; 706 } 707 } else { 708 val = s->vbe_regs[s->vbe_index]; 709 } 710 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) { 711 val = s->vbe_size / (64 * KiB); 712 } else { 713 val = 0; 714 } 715 trace_vga_vbe_read(s->vbe_index, val); 716 return val; 717 } 718 719 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val) 720 { 721 VGACommonState *s = opaque; 722 s->vbe_index = val; 723 } 724 725 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val) 726 { 727 VGACommonState *s = opaque; 728 729 if (s->vbe_index <= VBE_DISPI_INDEX_NB) { 730 trace_vga_vbe_write(s->vbe_index, val); 731 switch(s->vbe_index) { 732 case VBE_DISPI_INDEX_ID: 733 if (val == VBE_DISPI_ID0 || 734 val == VBE_DISPI_ID1 || 735 val == VBE_DISPI_ID2 || 736 val == VBE_DISPI_ID3 || 737 val == VBE_DISPI_ID4 || 738 val == VBE_DISPI_ID5) { 739 s->vbe_regs[s->vbe_index] = val; 740 } 741 break; 742 case VBE_DISPI_INDEX_XRES: 743 case VBE_DISPI_INDEX_YRES: 744 case VBE_DISPI_INDEX_BPP: 745 case VBE_DISPI_INDEX_VIRT_WIDTH: 746 case VBE_DISPI_INDEX_X_OFFSET: 747 case VBE_DISPI_INDEX_Y_OFFSET: 748 s->vbe_regs[s->vbe_index] = val; 749 vbe_fixup_regs(s); 750 vbe_update_vgaregs(s); 751 break; 752 case VBE_DISPI_INDEX_BANK: 753 val &= s->vbe_bank_mask; 754 s->vbe_regs[s->vbe_index] = val; 755 s->bank_offset = (val << 16); 756 vga_update_memory_access(s); 757 break; 758 case VBE_DISPI_INDEX_ENABLE: 759 if ((val & VBE_DISPI_ENABLED) && 760 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) { 761 762 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0; 763 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0; 764 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0; 765 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED; 766 vbe_fixup_regs(s); 767 vbe_update_vgaregs(s); 768 769 /* clear the screen */ 770 if (!(val & VBE_DISPI_NOCLEARMEM)) { 771 memset(s->vram_ptr, 0, 772 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset); 773 } 774 } else { 775 s->bank_offset = 0; 776 } 777 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0; 778 s->vbe_regs[s->vbe_index] = val; 779 vga_update_memory_access(s); 780 break; 781 default: 782 break; 783 } 784 } 785 } 786 787 /* called for accesses between 0xa0000 and 0xc0000 */ 788 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr) 789 { 790 int memory_map_mode, plane; 791 uint32_t ret; 792 793 /* convert to VGA memory offset */ 794 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 795 addr &= 0x1ffff; 796 switch(memory_map_mode) { 797 case 0: 798 break; 799 case 1: 800 if (addr >= 0x10000) 801 return 0xff; 802 addr += s->bank_offset; 803 break; 804 case 2: 805 addr -= 0x10000; 806 if (addr >= 0x8000) 807 return 0xff; 808 break; 809 default: 810 case 3: 811 addr -= 0x18000; 812 if (addr >= 0x8000) 813 return 0xff; 814 break; 815 } 816 817 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 818 /* chain4 mode */ 819 plane = addr & 3; 820 addr &= ~3; 821 } else if (s->gr[VGA_GFX_MODE] & VGA_GR05_HOST_ODD_EVEN) { 822 /* odd/even mode (aka text mode mapping) */ 823 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); 824 } else { 825 /* standard VGA latched access */ 826 plane = s->gr[VGA_GFX_PLANE_READ]; 827 } 828 829 if (s->gr[VGA_GFX_MISC] & VGA_GR06_CHAIN_ODD_EVEN) { 830 addr &= ~1; 831 } 832 833 /* Doubleword/word mode. See comment in vga_mem_writeb */ 834 if (s->cr[VGA_CRTC_UNDERLINE] & VGA_CR14_DW) { 835 addr >>= 2; 836 } else if ((s->gr[VGA_GFX_MODE] & VGA_GR05_HOST_ODD_EVEN) && 837 (s->cr[VGA_CRTC_MODE] & VGA_CR17_WORD_BYTE) == 0) { 838 addr >>= 1; 839 } 840 841 if (addr * sizeof(uint32_t) >= s->vram_size) { 842 return 0xff; 843 } 844 845 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) { 846 /* chain 4 mode: simplified access (but it should use the same 847 * algorithms as below, see e.g. vga_mem_writeb's plane mask check). 848 */ 849 return s->vram_ptr[(addr << 2) | plane]; 850 } 851 852 s->latch = ((uint32_t *)s->vram_ptr)[addr]; 853 if (!(s->gr[VGA_GFX_MODE] & 0x08)) { 854 /* read mode 0 */ 855 ret = GET_PLANE(s->latch, plane); 856 } else { 857 /* read mode 1 */ 858 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) & 859 mask16[s->gr[VGA_GFX_COMPARE_MASK]]; 860 ret |= ret >> 16; 861 ret |= ret >> 8; 862 ret = (~ret) & 0xff; 863 } 864 865 return ret; 866 } 867 868 /* called for accesses between 0xa0000 and 0xc0000 */ 869 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val) 870 { 871 int memory_map_mode, write_mode, b, func_select, mask; 872 uint32_t write_mask, bit_mask, set_mask; 873 int plane = 0; 874 875 #ifdef DEBUG_VGA_MEM 876 printf("vga: [0x" HWADDR_FMT_plx "] = 0x%02x\n", addr, val); 877 #endif 878 /* convert to VGA memory offset */ 879 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; 880 addr &= 0x1ffff; 881 switch(memory_map_mode) { 882 case 0: 883 break; 884 case 1: 885 if (addr >= 0x10000) 886 return; 887 addr += s->bank_offset; 888 break; 889 case 2: 890 addr -= 0x10000; 891 if (addr >= 0x8000) 892 return; 893 break; 894 default: 895 case 3: 896 addr -= 0x18000; 897 if (addr >= 0x8000) 898 return; 899 break; 900 } 901 902 mask = sr(s, VGA_SEQ_PLANE_WRITE); 903 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 904 /* chain 4 mode : simplest access */ 905 plane = addr & 3; 906 mask &= (1 << plane); 907 addr &= ~3; 908 } else { 909 if ((sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_SEQ_MODE) == 0) { 910 mask &= (addr & 1) ? 0x0a : 0x05; 911 } 912 if (s->gr[VGA_GFX_MISC] & VGA_GR06_CHAIN_ODD_EVEN) { 913 addr &= ~1; 914 } 915 } 916 917 /* Doubleword/word mode. These should be honored when displaying, 918 * not when reading/writing to memory! For example, chain4 modes 919 * use double-word mode and, on real hardware, would fetch bytes 920 * 0,1,2,3, 16,17,18,19, 32,33,34,35, etc. Text modes use word 921 * mode and, on real hardware, would fetch bytes 0,1, 8,9, etc. 922 * 923 * QEMU instead shifted addresses on memory accesses because it 924 * allows more optimizations (e.g. chain4_alias) and simplifies 925 * the draw_line handlers. Unfortunately, there is one case where 926 * the difference shows. When fetching font data, accesses are 927 * always in consecutive bytes, even if the text/attribute pairs 928 * are done in word mode. Hence, doing a right shift when operating 929 * on font data is wrong. So check the odd/even mode bits together with 930 * word mode bit. The odd/even read bit is 0 when reading font data, 931 * and the odd/even write bit is 1 when writing it. 932 */ 933 if (s->cr[VGA_CRTC_UNDERLINE] & VGA_CR14_DW) { 934 addr >>= 2; 935 } else if ((sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_SEQ_MODE) == 0 && 936 (s->cr[VGA_CRTC_MODE] & VGA_CR17_WORD_BYTE) == 0) { 937 addr >>= 1; 938 } 939 940 if (addr * sizeof(uint32_t) >= s->vram_size) { 941 return; 942 } 943 944 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { 945 if (mask) { 946 s->vram_ptr[(addr << 2) | plane] = val; 947 #ifdef DEBUG_VGA_MEM 948 printf("vga: chain4: [0x" HWADDR_FMT_plx "]\n", addr); 949 #endif 950 s->plane_updated |= mask; /* only used to detect font change */ 951 memory_region_set_dirty(&s->vram, addr, 1); 952 } 953 return; 954 } 955 956 /* standard VGA latched access */ 957 write_mode = s->gr[VGA_GFX_MODE] & 3; 958 switch(write_mode) { 959 default: 960 case 0: 961 /* rotate */ 962 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 963 val = ((val >> b) | (val << (8 - b))) & 0xff; 964 val |= val << 8; 965 val |= val << 16; 966 967 /* apply set/reset mask */ 968 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]]; 969 val = (val & ~set_mask) | 970 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask); 971 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 972 break; 973 case 1: 974 val = s->latch; 975 goto do_write; 976 case 2: 977 val = mask16[val & 0x0f]; 978 bit_mask = s->gr[VGA_GFX_BIT_MASK]; 979 break; 980 case 3: 981 /* rotate */ 982 b = s->gr[VGA_GFX_DATA_ROTATE] & 7; 983 val = (val >> b) | (val << (8 - b)); 984 985 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val; 986 val = mask16[s->gr[VGA_GFX_SR_VALUE]]; 987 break; 988 } 989 990 /* apply logical operation */ 991 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3; 992 switch(func_select) { 993 case 0: 994 default: 995 /* nothing to do */ 996 break; 997 case 1: 998 /* and */ 999 val &= s->latch; 1000 break; 1001 case 2: 1002 /* or */ 1003 val |= s->latch; 1004 break; 1005 case 3: 1006 /* xor */ 1007 val ^= s->latch; 1008 break; 1009 } 1010 1011 /* apply bit mask */ 1012 bit_mask |= bit_mask << 8; 1013 bit_mask |= bit_mask << 16; 1014 val = (val & bit_mask) | (s->latch & ~bit_mask); 1015 1016 do_write: 1017 /* mask data according to sr[2] */ 1018 s->plane_updated |= mask; /* only used to detect font change */ 1019 write_mask = mask16[mask]; 1020 ((uint32_t *)s->vram_ptr)[addr] = 1021 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | 1022 (val & write_mask); 1023 #ifdef DEBUG_VGA_MEM 1024 printf("vga: latch: [0x" HWADDR_FMT_plx "] mask=0x%08x val=0x%08x\n", 1025 addr * 4, write_mask, val); 1026 #endif 1027 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t)); 1028 } 1029 1030 typedef void *vga_draw_line_func(VGACommonState *s1, uint8_t *d, 1031 uint32_t srcaddr, int width, int hpel); 1032 1033 #include "vga-access.h" 1034 #include "vga-helpers.h" 1035 1036 /* return true if the palette was modified */ 1037 static int update_palette16(VGACommonState *s) 1038 { 1039 int full_update, i; 1040 uint32_t v, col, *palette; 1041 1042 full_update = 0; 1043 palette = s->last_palette; 1044 for(i = 0; i < 16; i++) { 1045 v = s->ar[i]; 1046 if (s->ar[VGA_ATC_MODE] & 0x80) { 1047 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf); 1048 } else { 1049 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f); 1050 } 1051 v = v * 3; 1052 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1053 c6_to_8(s->palette[v + 1]), 1054 c6_to_8(s->palette[v + 2])); 1055 if (col != palette[i]) { 1056 full_update = 1; 1057 palette[i] = col; 1058 } 1059 } 1060 return full_update; 1061 } 1062 1063 /* return true if the palette was modified */ 1064 static int update_palette256(VGACommonState *s) 1065 { 1066 int full_update, i; 1067 uint32_t v, col, *palette; 1068 1069 full_update = 0; 1070 palette = s->last_palette; 1071 v = 0; 1072 for(i = 0; i < 256; i++) { 1073 if (s->dac_8bit) { 1074 col = rgb_to_pixel32(s->palette[v], 1075 s->palette[v + 1], 1076 s->palette[v + 2]); 1077 } else { 1078 col = rgb_to_pixel32(c6_to_8(s->palette[v]), 1079 c6_to_8(s->palette[v + 1]), 1080 c6_to_8(s->palette[v + 2])); 1081 } 1082 if (col != palette[i]) { 1083 full_update = 1; 1084 palette[i] = col; 1085 } 1086 v += 3; 1087 } 1088 return full_update; 1089 } 1090 1091 static void vga_get_params(VGACommonState *s, 1092 VGADisplayParams *params) 1093 { 1094 if (vbe_enabled(s)) { 1095 params->line_offset = s->vbe_line_offset; 1096 params->start_addr = s->vbe_start_addr; 1097 params->line_compare = 65535; 1098 params->hpel = VGA_HPEL_NEUTRAL; 1099 params->hpel_split = false; 1100 } else { 1101 /* compute line_offset in bytes */ 1102 params->line_offset = s->cr[VGA_CRTC_OFFSET] << 3; 1103 1104 /* starting address */ 1105 params->start_addr = s->cr[VGA_CRTC_START_LO] | 1106 (s->cr[VGA_CRTC_START_HI] << 8); 1107 1108 /* line compare */ 1109 params->line_compare = s->cr[VGA_CRTC_LINE_COMPARE] | 1110 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) | 1111 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3); 1112 1113 params->hpel = s->ar[VGA_ATC_PEL]; 1114 params->hpel_split = s->ar[VGA_ATC_MODE] & 0x20; 1115 } 1116 } 1117 1118 /* update start_addr and line_offset. Return TRUE if modified */ 1119 static int update_basic_params(VGACommonState *s) 1120 { 1121 int full_update; 1122 VGADisplayParams current; 1123 1124 full_update = 0; 1125 1126 s->get_params(s, ¤t); 1127 1128 if (memcmp(¤t, &s->params, sizeof(current))) { 1129 s->params = current; 1130 full_update = 1; 1131 } 1132 return full_update; 1133 } 1134 1135 1136 static const uint8_t cursor_glyph[32 * 4] = { 1137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1142 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1147 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1148 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1149 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1150 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1151 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1152 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 1153 }; 1154 1155 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight, 1156 int *pcwidth, int *pcheight) 1157 { 1158 int width, cwidth, height, cheight; 1159 1160 /* total width & height */ 1161 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1162 cwidth = 8; 1163 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { 1164 cwidth = 9; 1165 } 1166 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { 1167 cwidth = 16; /* NOTE: no 18 pixel wide */ 1168 } 1169 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1170 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1171 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1172 height = 100; 1173 } else { 1174 height = s->cr[VGA_CRTC_V_DISP_END] | 1175 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1176 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1177 height = (height + 1) / cheight; 1178 } 1179 1180 *pwidth = width; 1181 *pheight = height; 1182 *pcwidth = cwidth; 1183 *pcheight = cheight; 1184 } 1185 1186 /* 1187 * Text mode update 1188 * Missing: 1189 * - double scan 1190 * - double width 1191 * - underline 1192 * - flashing 1193 */ 1194 static void vga_draw_text(VGACommonState *s, int full_update) 1195 { 1196 DisplaySurface *surface = qemu_console_surface(s->con); 1197 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr; 1198 int cx_min, cx_max, linesize, x_incr, line, line1; 1199 uint32_t offset, fgcol, bgcol, v, cursor_offset; 1200 uint8_t *d1, *d, *src, *dest, *cursor_ptr; 1201 const uint8_t *font_ptr, *font_base[2]; 1202 int dup9, line_offset; 1203 uint32_t *palette; 1204 uint32_t *ch_attr_ptr; 1205 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1206 1207 /* compute font data address (in plane 2) */ 1208 v = sr(s, VGA_SEQ_CHARACTER_MAP); 1209 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; 1210 if (offset != s->font_offsets[0]) { 1211 s->font_offsets[0] = offset; 1212 full_update = 1; 1213 } 1214 font_base[0] = s->vram_ptr + offset; 1215 1216 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; 1217 font_base[1] = s->vram_ptr + offset; 1218 if (offset != s->font_offsets[1]) { 1219 s->font_offsets[1] = offset; 1220 full_update = 1; 1221 } 1222 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) { 1223 /* if the plane 2 was modified since the last display, it 1224 indicates the font may have been modified */ 1225 s->plane_updated = 0; 1226 full_update = 1; 1227 } 1228 full_update |= update_basic_params(s); 1229 1230 line_offset = s->params.line_offset; 1231 1232 vga_get_text_resolution(s, &width, &height, &cw, &cheight); 1233 if ((height * width) <= 1) { 1234 /* better than nothing: exit if transient size is too small */ 1235 return; 1236 } 1237 if ((height * width) > CH_ATTR_SIZE) { 1238 /* better than nothing: exit if transient size is too big */ 1239 return; 1240 } 1241 1242 if (width != s->last_width || height != s->last_height || 1243 cw != s->last_cw || cheight != s->last_ch || s->last_depth) { 1244 s->last_scr_width = width * cw; 1245 s->last_scr_height = height * cheight; 1246 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1247 surface = qemu_console_surface(s->con); 1248 dpy_text_resize(s->con, width, height); 1249 s->last_depth = 0; 1250 s->last_width = width; 1251 s->last_height = height; 1252 s->last_ch = cheight; 1253 s->last_cw = cw; 1254 full_update = 1; 1255 } 1256 full_update |= update_palette16(s); 1257 palette = s->last_palette; 1258 x_incr = cw * surface_bytes_per_pixel(surface); 1259 1260 if (full_update) { 1261 s->full_update_text = 1; 1262 } 1263 if (s->full_update_gfx) { 1264 s->full_update_gfx = 0; 1265 full_update |= 1; 1266 } 1267 1268 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1269 s->cr[VGA_CRTC_CURSOR_LO]) - s->params.start_addr; 1270 if (cursor_offset != s->cursor_offset || 1271 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1272 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) { 1273 /* if the cursor position changed, we update the old and new 1274 chars */ 1275 if (s->cursor_offset < CH_ATTR_SIZE) 1276 s->last_ch_attr[s->cursor_offset] = -1; 1277 if (cursor_offset < CH_ATTR_SIZE) 1278 s->last_ch_attr[cursor_offset] = -1; 1279 s->cursor_offset = cursor_offset; 1280 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1281 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1282 } 1283 cursor_ptr = s->vram_ptr + (s->params.start_addr + cursor_offset) * 4; 1284 if (now >= s->cursor_blink_time) { 1285 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2; 1286 s->cursor_visible_phase = !s->cursor_visible_phase; 1287 } 1288 1289 dest = surface_data(surface); 1290 linesize = surface_stride(surface); 1291 ch_attr_ptr = s->last_ch_attr; 1292 line = 0; 1293 offset = s->params.start_addr * 4; 1294 for(cy = 0; cy < height; cy++) { 1295 d1 = dest; 1296 src = s->vram_ptr + offset; 1297 cx_min = width; 1298 cx_max = -1; 1299 for(cx = 0; cx < width; cx++) { 1300 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) { 1301 break; 1302 } 1303 ch_attr = *(uint16_t *)src; 1304 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) { 1305 if (cx < cx_min) 1306 cx_min = cx; 1307 if (cx > cx_max) 1308 cx_max = cx; 1309 *ch_attr_ptr = ch_attr; 1310 #if HOST_BIG_ENDIAN 1311 ch = ch_attr >> 8; 1312 cattr = ch_attr & 0xff; 1313 #else 1314 ch = ch_attr & 0xff; 1315 cattr = ch_attr >> 8; 1316 #endif 1317 font_ptr = font_base[(cattr >> 3) & 1]; 1318 font_ptr += 32 * 4 * ch; 1319 bgcol = palette[cattr >> 4]; 1320 fgcol = palette[cattr & 0x0f]; 1321 if (cw == 16) { 1322 vga_draw_glyph16(d1, linesize, 1323 font_ptr, cheight, fgcol, bgcol); 1324 } else if (cw != 9) { 1325 vga_draw_glyph8(d1, linesize, 1326 font_ptr, cheight, fgcol, bgcol); 1327 } else { 1328 dup9 = 0; 1329 if (ch >= 0xb0 && ch <= 0xdf && 1330 (s->ar[VGA_ATC_MODE] & 0x04)) { 1331 dup9 = 1; 1332 } 1333 vga_draw_glyph9(d1, linesize, 1334 font_ptr, cheight, fgcol, bgcol, dup9); 1335 } 1336 if (src == cursor_ptr && 1337 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) && 1338 s->cursor_visible_phase) { 1339 int line_start, line_last, h; 1340 /* draw the cursor */ 1341 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f; 1342 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f; 1343 /* XXX: check that */ 1344 if (line_last > cheight - 1) 1345 line_last = cheight - 1; 1346 if (line_last >= line_start && line_start < cheight) { 1347 h = line_last - line_start + 1; 1348 d = d1 + linesize * line_start; 1349 if (cw == 16) { 1350 vga_draw_glyph16(d, linesize, 1351 cursor_glyph, h, fgcol, bgcol); 1352 } else if (cw != 9) { 1353 vga_draw_glyph8(d, linesize, 1354 cursor_glyph, h, fgcol, bgcol); 1355 } else { 1356 vga_draw_glyph9(d, linesize, 1357 cursor_glyph, h, fgcol, bgcol, 1); 1358 } 1359 } 1360 } 1361 } 1362 d1 += x_incr; 1363 src += 4; 1364 ch_attr_ptr++; 1365 } 1366 if (cx_max != -1) { 1367 dpy_gfx_update(s->con, cx_min * cw, cy * cheight, 1368 (cx_max - cx_min + 1) * cw, cheight); 1369 } 1370 dest += linesize * cheight; 1371 line1 = line + cheight; 1372 offset += line_offset; 1373 if (line < s->params.line_compare && line1 >= s->params.line_compare) { 1374 offset = 0; 1375 } 1376 line = line1; 1377 } 1378 } 1379 1380 enum { 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 VGA_DRAW_LINE_NB, 1396 }; 1397 1398 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = { 1399 vga_draw_line2, 1400 vga_draw_line2d2, 1401 vga_draw_line4, 1402 vga_draw_line4d2, 1403 vga_draw_line8d2, 1404 vga_draw_line8, 1405 vga_draw_line15_le, 1406 vga_draw_line16_le, 1407 vga_draw_line24_le, 1408 vga_draw_line32_le, 1409 vga_draw_line15_be, 1410 vga_draw_line16_be, 1411 vga_draw_line24_be, 1412 vga_draw_line32_be, 1413 }; 1414 1415 static int vga_get_bpp(VGACommonState *s) 1416 { 1417 int ret; 1418 1419 if (vbe_enabled(s)) { 1420 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP]; 1421 } else { 1422 ret = 0; 1423 } 1424 return ret; 1425 } 1426 1427 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight) 1428 { 1429 int width, height; 1430 1431 if (vbe_enabled(s)) { 1432 width = s->vbe_regs[VBE_DISPI_INDEX_XRES]; 1433 height = s->vbe_regs[VBE_DISPI_INDEX_YRES]; 1434 } else { 1435 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8; 1436 height = s->cr[VGA_CRTC_V_DISP_END] | 1437 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1438 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1439 height = (height + 1); 1440 } 1441 *pwidth = width; 1442 *pheight = height; 1443 } 1444 1445 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2) 1446 { 1447 int y; 1448 if (y1 >= VGA_MAX_HEIGHT) 1449 return; 1450 if (y2 >= VGA_MAX_HEIGHT) 1451 y2 = VGA_MAX_HEIGHT; 1452 for(y = y1; y < y2; y++) { 1453 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f); 1454 } 1455 } 1456 1457 static bool vga_scanline_invalidated(VGACommonState *s, int y) 1458 { 1459 if (y >= VGA_MAX_HEIGHT) { 1460 return false; 1461 } 1462 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f)); 1463 } 1464 1465 void vga_dirty_log_start(VGACommonState *s) 1466 { 1467 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA); 1468 } 1469 1470 void vga_dirty_log_stop(VGACommonState *s) 1471 { 1472 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA); 1473 } 1474 1475 /* 1476 * graphic modes 1477 */ 1478 static void vga_draw_graphic(VGACommonState *s, int full_update) 1479 { 1480 DisplaySurface *surface = qemu_console_surface(s->con); 1481 int y1, y, update, linesize, y_start, double_scan, mask, depth; 1482 int width, height, shift_control, bwidth, bits; 1483 ram_addr_t page0, page1, region_start, region_end; 1484 DirtyBitmapSnapshot *snap = NULL; 1485 int disp_width, multi_scan, multi_run; 1486 int hpel; 1487 uint8_t *d; 1488 uint32_t v, addr1, addr; 1489 vga_draw_line_func *vga_draw_line = NULL; 1490 bool share_surface, force_shadow = false; 1491 pixman_format_code_t format; 1492 #if HOST_BIG_ENDIAN 1493 bool byteswap = !s->big_endian_fb; 1494 #else 1495 bool byteswap = s->big_endian_fb; 1496 #endif 1497 1498 full_update |= update_basic_params(s); 1499 1500 s->get_resolution(s, &width, &height); 1501 disp_width = width; 1502 depth = s->get_bpp(s); 1503 1504 /* bits 5-6: 0 = 16-color mode, 1 = 4-color mode, 2 = 256-color mode. */ 1505 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3; 1506 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7); 1507 if (s->cr[VGA_CRTC_MODE] & 1) { 1508 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan) 1509 - 1; 1510 } else { 1511 /* in CGA modes, multi_scan is ignored */ 1512 /* XXX: is it correct ? */ 1513 multi_scan = double_scan; 1514 } 1515 multi_run = multi_scan; 1516 if (shift_control != s->shift_control || 1517 double_scan != s->double_scan) { 1518 full_update = 1; 1519 s->shift_control = shift_control; 1520 s->double_scan = double_scan; 1521 } 1522 1523 if (shift_control == 0) { 1524 full_update |= update_palette16(s); 1525 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1526 disp_width <<= 1; 1527 v = VGA_DRAW_LINE4D2; 1528 } else { 1529 v = VGA_DRAW_LINE4; 1530 } 1531 bits = 4; 1532 1533 } else if (shift_control == 1) { 1534 full_update |= update_palette16(s); 1535 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { 1536 disp_width <<= 1; 1537 v = VGA_DRAW_LINE2D2; 1538 } else { 1539 v = VGA_DRAW_LINE2; 1540 } 1541 bits = 4; 1542 1543 } else { 1544 switch (depth) { 1545 default: 1546 case 0: 1547 full_update |= update_palette256(s); 1548 v = VGA_DRAW_LINE8D2; 1549 bits = 4; 1550 break; 1551 case 8: 1552 full_update |= update_palette256(s); 1553 v = VGA_DRAW_LINE8; 1554 bits = 8; 1555 break; 1556 case 15: 1557 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE; 1558 bits = 16; 1559 break; 1560 case 16: 1561 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE; 1562 bits = 16; 1563 break; 1564 case 24: 1565 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE; 1566 bits = 24; 1567 break; 1568 case 32: 1569 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE; 1570 bits = 32; 1571 break; 1572 } 1573 } 1574 1575 /* Horizontal pel panning bit 3 is only used in text mode. */ 1576 hpel = bits <= 8 ? s->params.hpel & 7 : 0; 1577 bwidth = DIV_ROUND_UP(width * bits, 8); /* scanline length */ 1578 if (hpel) { 1579 bwidth += 4; 1580 } 1581 1582 region_start = (s->params.start_addr * 4); 1583 region_end = region_start + (ram_addr_t)s->params.line_offset * (height - 1) + bwidth; 1584 if (region_end > s->vbe_size) { 1585 /* 1586 * On wrap around take the safe and slow route: 1587 * - create a dirty bitmap snapshot for all vga memory. 1588 * - force shadowing (so all vga memory access goes 1589 * through vga_read_*() helpers). 1590 * 1591 * Given this affects only vga features which are pretty much 1592 * unused by modern guests there should be no performance 1593 * impact. 1594 */ 1595 region_start = 0; 1596 region_end = s->vbe_size; 1597 force_shadow = true; 1598 } 1599 if (s->params.line_compare < height) { 1600 /* split screen mode */ 1601 region_start = 0; 1602 } 1603 1604 /* 1605 * Check whether we can share the surface with the backend 1606 * or whether we need a shadow surface. We share native 1607 * endian surfaces for 15bpp and above and byteswapped 1608 * surfaces for 24bpp and above. 1609 */ 1610 format = qemu_default_pixman_format(depth, !byteswap); 1611 if (format) { 1612 share_surface = dpy_gfx_check_format(s->con, format) 1613 && !s->force_shadow && !force_shadow; 1614 } else { 1615 share_surface = false; 1616 } 1617 1618 if (s->params.line_offset != s->last_line_offset || 1619 disp_width != s->last_width || 1620 height != s->last_height || 1621 s->last_depth != depth || 1622 s->last_byteswap != byteswap || 1623 share_surface != is_buffer_shared(surface)) { 1624 /* display parameters changed -> need new display surface */ 1625 s->last_scr_width = disp_width; 1626 s->last_scr_height = height; 1627 s->last_width = disp_width; 1628 s->last_height = height; 1629 s->last_line_offset = s->params.line_offset; 1630 s->last_depth = depth; 1631 s->last_byteswap = byteswap; 1632 /* 16 extra pixels are needed for double-width planar modes. */ 1633 s->panning_buf = g_realloc(s->panning_buf, 1634 (disp_width + 16) * sizeof(uint32_t)); 1635 full_update = 1; 1636 } 1637 if (surface_data(surface) != s->vram_ptr + (s->params.start_addr * 4) 1638 && is_buffer_shared(surface)) { 1639 /* base address changed (page flip) -> shared display surfaces 1640 * must be updated with the new base address */ 1641 full_update = 1; 1642 } 1643 1644 if (full_update) { 1645 if (share_surface) { 1646 surface = qemu_create_displaysurface_from(disp_width, 1647 height, format, s->params.line_offset, 1648 s->vram_ptr + (s->params.start_addr * 4)); 1649 dpy_gfx_replace_surface(s->con, surface); 1650 } else { 1651 qemu_console_resize(s->con, disp_width, height); 1652 surface = qemu_console_surface(s->con); 1653 } 1654 } 1655 1656 vga_draw_line = vga_draw_line_table[v]; 1657 1658 if (!is_buffer_shared(surface) && s->cursor_invalidate) { 1659 s->cursor_invalidate(s); 1660 } 1661 1662 #if 0 1663 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", 1664 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE], 1665 s->params.line_compare, sr(s, VGA_SEQ_CLOCK_MODE)); 1666 #endif 1667 addr1 = (s->params.start_addr * 4); 1668 y_start = -1; 1669 d = surface_data(surface); 1670 linesize = surface_stride(surface); 1671 y1 = 0; 1672 1673 if (!full_update) { 1674 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start, 1675 region_end - region_start, 1676 DIRTY_MEMORY_VGA); 1677 } 1678 1679 for(y = 0; y < height; y++) { 1680 addr = addr1; 1681 if (!(s->cr[VGA_CRTC_MODE] & 1)) { 1682 int shift; 1683 /* CGA compatibility handling */ 1684 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1); 1685 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); 1686 } 1687 if (!(s->cr[VGA_CRTC_MODE] & 2)) { 1688 addr = (addr & ~0x8000) | ((y1 & 2) << 14); 1689 } 1690 page0 = addr & s->vbe_size_mask; 1691 page1 = (addr + bwidth - 1) & s->vbe_size_mask; 1692 if (full_update) { 1693 update = 1; 1694 } else if (page1 < page0) { 1695 /* scanline wraps from end of video memory to the start */ 1696 assert(force_shadow); 1697 update = memory_region_snapshot_get_dirty(&s->vram, snap, 1698 page0, s->vbe_size - page0); 1699 update |= memory_region_snapshot_get_dirty(&s->vram, snap, 1700 0, page1); 1701 } else { 1702 update = memory_region_snapshot_get_dirty(&s->vram, snap, 1703 page0, page1 - page0); 1704 } 1705 /* explicit invalidation for the hardware cursor (cirrus only) */ 1706 update |= vga_scanline_invalidated(s, y); 1707 if (update) { 1708 if (y_start < 0) 1709 y_start = y; 1710 if (!(is_buffer_shared(surface))) { 1711 uint8_t *p; 1712 p = vga_draw_line(s, d, addr, width, hpel); 1713 if (p) { 1714 memcpy(d, p, disp_width * sizeof(uint32_t)); 1715 } 1716 if (s->cursor_draw_line) 1717 s->cursor_draw_line(s, d, y); 1718 } 1719 } else { 1720 if (y_start >= 0) { 1721 /* flush to display */ 1722 dpy_gfx_update(s->con, 0, y_start, 1723 disp_width, y - y_start); 1724 y_start = -1; 1725 } 1726 } 1727 if (!multi_run) { 1728 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3; 1729 if ((y1 & mask) == mask) 1730 addr1 += s->params.line_offset; 1731 y1++; 1732 multi_run = multi_scan; 1733 } else { 1734 multi_run--; 1735 } 1736 /* line compare acts on the displayed lines */ 1737 if (y == s->params.line_compare) { 1738 if (s->params.hpel_split) { 1739 hpel = VGA_HPEL_NEUTRAL; 1740 } 1741 addr1 = 0; 1742 } 1743 d += linesize; 1744 } 1745 if (y_start >= 0) { 1746 /* flush to display */ 1747 dpy_gfx_update(s->con, 0, y_start, 1748 disp_width, y - y_start); 1749 } 1750 g_free(snap); 1751 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table)); 1752 } 1753 1754 static void vga_draw_blank(VGACommonState *s, int full_update) 1755 { 1756 DisplaySurface *surface = qemu_console_surface(s->con); 1757 int i, w; 1758 uint8_t *d; 1759 1760 if (!full_update) 1761 return; 1762 if (s->last_scr_width <= 0 || s->last_scr_height <= 0) 1763 return; 1764 1765 w = s->last_scr_width * surface_bytes_per_pixel(surface); 1766 d = surface_data(surface); 1767 for(i = 0; i < s->last_scr_height; i++) { 1768 memset(d, 0, w); 1769 d += surface_stride(surface); 1770 } 1771 dpy_gfx_update_full(s->con); 1772 } 1773 1774 #define GMODE_TEXT 0 1775 #define GMODE_GRAPH 1 1776 #define GMODE_BLANK 2 1777 1778 static void vga_update_display(void *opaque) 1779 { 1780 VGACommonState *s = opaque; 1781 DisplaySurface *surface = qemu_console_surface(s->con); 1782 int full_update, graphic_mode; 1783 1784 qemu_flush_coalesced_mmio_buffer(); 1785 1786 if (surface_bits_per_pixel(surface) == 0) { 1787 /* nothing to do */ 1788 } else { 1789 full_update = 0; 1790 if (!(s->ar_index & 0x20)) { 1791 graphic_mode = GMODE_BLANK; 1792 } else { 1793 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1794 } 1795 if (graphic_mode != s->graphic_mode) { 1796 s->graphic_mode = graphic_mode; 1797 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); 1798 full_update = 1; 1799 } 1800 switch(graphic_mode) { 1801 case GMODE_TEXT: 1802 vga_draw_text(s, full_update); 1803 break; 1804 case GMODE_GRAPH: 1805 vga_draw_graphic(s, full_update); 1806 break; 1807 case GMODE_BLANK: 1808 default: 1809 vga_draw_blank(s, full_update); 1810 break; 1811 } 1812 } 1813 } 1814 1815 /* force a full display refresh */ 1816 static void vga_invalidate_display(void *opaque) 1817 { 1818 VGACommonState *s = opaque; 1819 1820 s->last_width = -1; 1821 s->last_height = -1; 1822 } 1823 1824 void vga_common_reset(VGACommonState *s) 1825 { 1826 s->sr_index = 0; 1827 memset(s->sr, '\0', sizeof(s->sr)); 1828 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe)); 1829 s->gr_index = 0; 1830 memset(s->gr, '\0', sizeof(s->gr)); 1831 s->ar_index = 0; 1832 memset(s->ar, '\0', sizeof(s->ar)); 1833 s->ar_flip_flop = 0; 1834 s->cr_index = 0; 1835 memset(s->cr, '\0', sizeof(s->cr)); 1836 s->msr = 0; 1837 s->fcr = 0; 1838 s->st00 = 0; 1839 s->st01 = 0; 1840 s->dac_state = 0; 1841 s->dac_sub_index = 0; 1842 s->dac_read_index = 0; 1843 s->dac_write_index = 0; 1844 memset(s->dac_cache, '\0', sizeof(s->dac_cache)); 1845 s->dac_8bit = 0; 1846 memset(s->palette, '\0', sizeof(s->palette)); 1847 s->bank_offset = 0; 1848 s->vbe_index = 0; 1849 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs)); 1850 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5; 1851 s->vbe_start_addr = 0; 1852 s->vbe_line_offset = 0; 1853 s->vbe_bank_mask = (s->vram_size >> 16) - 1; 1854 memset(s->font_offsets, '\0', sizeof(s->font_offsets)); 1855 s->graphic_mode = -1; /* force full update */ 1856 s->shift_control = 0; 1857 s->double_scan = 0; 1858 memset(&s->params, '\0', sizeof(s->params)); 1859 s->plane_updated = 0; 1860 s->last_cw = 0; 1861 s->last_ch = 0; 1862 s->last_width = 0; 1863 s->last_height = 0; 1864 s->last_scr_width = 0; 1865 s->last_scr_height = 0; 1866 s->cursor_start = 0; 1867 s->cursor_end = 0; 1868 s->cursor_offset = 0; 1869 s->big_endian_fb = s->default_endian_fb; 1870 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table)); 1871 memset(s->last_palette, '\0', sizeof(s->last_palette)); 1872 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr)); 1873 switch (vga_retrace_method) { 1874 case VGA_RETRACE_DUMB: 1875 break; 1876 case VGA_RETRACE_PRECISE: 1877 memset(&s->retrace_info, 0, sizeof (s->retrace_info)); 1878 break; 1879 } 1880 vga_update_memory_access(s); 1881 } 1882 1883 static void vga_reset(void *opaque) 1884 { 1885 VGACommonState *s = opaque; 1886 vga_common_reset(s); 1887 } 1888 1889 #define TEXTMODE_X(x) ((x) % width) 1890 #define TEXTMODE_Y(x) ((x) / width) 1891 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \ 1892 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1)) 1893 /* relay text rendering to the display driver 1894 * instead of doing a full vga_update_display() */ 1895 static void vga_update_text(void *opaque, console_ch_t *chardata) 1896 { 1897 VGACommonState *s = opaque; 1898 int graphic_mode, i, cursor_offset, cursor_visible; 1899 int cw, cheight, width, height, size, c_min, c_max; 1900 uint32_t *src; 1901 console_ch_t *dst, val; 1902 char msg_buffer[80]; 1903 int full_update = 0; 1904 1905 qemu_flush_coalesced_mmio_buffer(); 1906 1907 if (!(s->ar_index & 0x20)) { 1908 graphic_mode = GMODE_BLANK; 1909 } else { 1910 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; 1911 } 1912 if (graphic_mode != s->graphic_mode) { 1913 s->graphic_mode = graphic_mode; 1914 full_update = 1; 1915 } 1916 if (s->last_width == -1) { 1917 s->last_width = 0; 1918 full_update = 1; 1919 } 1920 1921 switch (graphic_mode) { 1922 case GMODE_TEXT: 1923 /* TODO: update palette */ 1924 full_update |= update_basic_params(s); 1925 1926 /* total width & height */ 1927 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; 1928 cw = 8; 1929 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { 1930 cw = 9; 1931 } 1932 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { 1933 cw = 16; /* NOTE: no 18 pixel wide */ 1934 } 1935 width = (s->cr[VGA_CRTC_H_DISP] + 1); 1936 if (s->cr[VGA_CRTC_V_TOTAL] == 100) { 1937 /* ugly hack for CGA 160x100x16 - explain me the logic */ 1938 height = 100; 1939 } else { 1940 height = s->cr[VGA_CRTC_V_DISP_END] | 1941 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | 1942 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); 1943 height = (height + 1) / cheight; 1944 } 1945 1946 size = (height * width); 1947 if (size > CH_ATTR_SIZE) { 1948 if (!full_update) 1949 return; 1950 1951 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode", 1952 width, height); 1953 break; 1954 } 1955 1956 if (width != s->last_width || height != s->last_height || 1957 cw != s->last_cw || cheight != s->last_ch) { 1958 s->last_scr_width = width * cw; 1959 s->last_scr_height = height * cheight; 1960 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); 1961 dpy_text_resize(s->con, width, height); 1962 s->last_depth = 0; 1963 s->last_width = width; 1964 s->last_height = height; 1965 s->last_ch = cheight; 1966 s->last_cw = cw; 1967 full_update = 1; 1968 } 1969 1970 if (full_update) { 1971 s->full_update_gfx = 1; 1972 } 1973 if (s->full_update_text) { 1974 s->full_update_text = 0; 1975 full_update |= 1; 1976 } 1977 1978 /* Update "hardware" cursor */ 1979 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | 1980 s->cr[VGA_CRTC_CURSOR_LO]) - s->params.start_addr; 1981 if (cursor_offset != s->cursor_offset || 1982 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || 1983 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) { 1984 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20); 1985 if (cursor_visible && cursor_offset < size && cursor_offset >= 0) 1986 dpy_text_cursor(s->con, 1987 TEXTMODE_X(cursor_offset), 1988 TEXTMODE_Y(cursor_offset)); 1989 else 1990 dpy_text_cursor(s->con, -1, -1); 1991 s->cursor_offset = cursor_offset; 1992 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; 1993 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; 1994 } 1995 1996 src = (uint32_t *) s->vram_ptr + s->params.start_addr; 1997 dst = chardata; 1998 1999 if (full_update) { 2000 for (i = 0; i < size; src ++, dst ++, i ++) 2001 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src))); 2002 2003 dpy_text_update(s->con, 0, 0, width, height); 2004 } else { 2005 c_max = 0; 2006 2007 for (i = 0; i < size; src ++, dst ++, i ++) { 2008 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 2009 if (*dst != val) { 2010 *dst = val; 2011 c_max = i; 2012 break; 2013 } 2014 } 2015 c_min = i; 2016 for (; i < size; src ++, dst ++, i ++) { 2017 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); 2018 if (*dst != val) { 2019 *dst = val; 2020 c_max = i; 2021 } 2022 } 2023 2024 if (c_min <= c_max) { 2025 i = TEXTMODE_Y(c_min); 2026 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1); 2027 } 2028 } 2029 2030 return; 2031 case GMODE_GRAPH: 2032 if (!full_update) 2033 return; 2034 2035 s->get_resolution(s, &width, &height); 2036 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode", 2037 width, height); 2038 break; 2039 case GMODE_BLANK: 2040 default: 2041 if (!full_update) 2042 return; 2043 2044 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode"); 2045 break; 2046 } 2047 2048 /* Display a message */ 2049 s->last_width = 60; 2050 s->last_height = height = 3; 2051 dpy_text_cursor(s->con, -1, -1); 2052 dpy_text_resize(s->con, s->last_width, height); 2053 2054 for (dst = chardata, i = 0; i < s->last_width * height; i ++) 2055 console_write_ch(dst ++, ' '); 2056 2057 size = strlen(msg_buffer); 2058 width = (s->last_width - size) / 2; 2059 dst = chardata + s->last_width + width; 2060 for (i = 0; i < size; i ++) 2061 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE, 2062 QEMU_COLOR_BLACK, 1)); 2063 2064 dpy_text_update(s->con, 0, 0, s->last_width, height); 2065 } 2066 2067 static uint64_t vga_mem_read(void *opaque, hwaddr addr, 2068 unsigned size) 2069 { 2070 VGACommonState *s = opaque; 2071 2072 return vga_mem_readb(s, addr); 2073 } 2074 2075 static void vga_mem_write(void *opaque, hwaddr addr, 2076 uint64_t data, unsigned size) 2077 { 2078 VGACommonState *s = opaque; 2079 2080 vga_mem_writeb(s, addr, data); 2081 } 2082 2083 const MemoryRegionOps vga_mem_ops = { 2084 .read = vga_mem_read, 2085 .write = vga_mem_write, 2086 .endianness = DEVICE_LITTLE_ENDIAN, 2087 .impl = { 2088 .min_access_size = 1, 2089 .max_access_size = 1, 2090 }, 2091 }; 2092 2093 static int vga_common_post_load(void *opaque, int version_id) 2094 { 2095 VGACommonState *s = opaque; 2096 2097 /* force refresh */ 2098 s->graphic_mode = -1; 2099 vbe_update_vgaregs(s); 2100 vga_update_memory_access(s); 2101 return 0; 2102 } 2103 2104 static bool vga_endian_state_needed(void *opaque) 2105 { 2106 VGACommonState *s = opaque; 2107 2108 /* 2109 * Only send the endian state if it's different from the 2110 * default one, thus ensuring backward compatibility for 2111 * migration of the common case 2112 */ 2113 return s->default_endian_fb != s->big_endian_fb; 2114 } 2115 2116 static const VMStateDescription vmstate_vga_endian = { 2117 .name = "vga.endian", 2118 .version_id = 1, 2119 .minimum_version_id = 1, 2120 .needed = vga_endian_state_needed, 2121 .fields = (const VMStateField[]) { 2122 VMSTATE_BOOL(big_endian_fb, VGACommonState), 2123 VMSTATE_END_OF_LIST() 2124 } 2125 }; 2126 2127 const VMStateDescription vmstate_vga_common = { 2128 .name = "vga", 2129 .version_id = 2, 2130 .minimum_version_id = 2, 2131 .post_load = vga_common_post_load, 2132 .fields = (const VMStateField[]) { 2133 VMSTATE_UINT32(latch, VGACommonState), 2134 VMSTATE_UINT8(sr_index, VGACommonState), 2135 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8), 2136 VMSTATE_UINT8(gr_index, VGACommonState), 2137 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16), 2138 VMSTATE_UINT8(ar_index, VGACommonState), 2139 VMSTATE_BUFFER(ar, VGACommonState), 2140 VMSTATE_INT32(ar_flip_flop, VGACommonState), 2141 VMSTATE_UINT8(cr_index, VGACommonState), 2142 VMSTATE_BUFFER(cr, VGACommonState), 2143 VMSTATE_UINT8(msr, VGACommonState), 2144 VMSTATE_UINT8(fcr, VGACommonState), 2145 VMSTATE_UINT8(st00, VGACommonState), 2146 VMSTATE_UINT8(st01, VGACommonState), 2147 2148 VMSTATE_UINT8(dac_state, VGACommonState), 2149 VMSTATE_UINT8(dac_sub_index, VGACommonState), 2150 VMSTATE_UINT8(dac_read_index, VGACommonState), 2151 VMSTATE_UINT8(dac_write_index, VGACommonState), 2152 VMSTATE_BUFFER(dac_cache, VGACommonState), 2153 VMSTATE_BUFFER(palette, VGACommonState), 2154 2155 VMSTATE_INT32(bank_offset, VGACommonState), 2156 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL), 2157 VMSTATE_UINT16(vbe_index, VGACommonState), 2158 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB), 2159 VMSTATE_UINT32(vbe_start_addr, VGACommonState), 2160 VMSTATE_UINT32(vbe_line_offset, VGACommonState), 2161 VMSTATE_UINT32(vbe_bank_mask, VGACommonState), 2162 VMSTATE_END_OF_LIST() 2163 }, 2164 .subsections = (const VMStateDescription * const []) { 2165 &vmstate_vga_endian, 2166 NULL 2167 } 2168 }; 2169 2170 static const GraphicHwOps vga_ops = { 2171 .invalidate = vga_invalidate_display, 2172 .gfx_update = vga_update_display, 2173 .text_update = vga_update_text, 2174 }; 2175 2176 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax) 2177 { 2178 if (val < vmin) { 2179 return vmin; 2180 } 2181 if (val > vmax) { 2182 return vmax; 2183 } 2184 return val; 2185 } 2186 2187 bool vga_common_init(VGACommonState *s, Object *obj, Error **errp) 2188 { 2189 int i, j, v, b; 2190 Error *local_err = NULL; 2191 2192 for(i = 0;i < 256; i++) { 2193 v = 0; 2194 for(j = 0; j < 8; j++) { 2195 v |= ((i >> j) & 1) << (j * 4); 2196 } 2197 expand4[i] = v; 2198 2199 v = 0; 2200 for(j = 0; j < 4; j++) { 2201 v |= ((i >> (2 * j)) & 3) << (j * 4); 2202 } 2203 expand2[i] = v; 2204 } 2205 for(i = 0; i < 16; i++) { 2206 v = 0; 2207 for(j = 0; j < 4; j++) { 2208 b = ((i >> j) & 1); 2209 v |= b << (2 * j); 2210 v |= b << (2 * j + 1); 2211 } 2212 expand4to8[i] = v; 2213 } 2214 2215 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512); 2216 s->vram_size_mb = pow2ceil(s->vram_size_mb); 2217 s->vram_size = s->vram_size_mb * MiB; 2218 2219 if (!s->vbe_size) { 2220 s->vbe_size = s->vram_size; 2221 } 2222 s->vbe_size_mask = s->vbe_size - 1; 2223 2224 s->is_vbe_vmstate = 1; 2225 2226 if (s->global_vmstate && qemu_ram_block_by_name("vga.vram")) { 2227 error_setg(errp, "Only one global VGA device can be used at a time"); 2228 return false; 2229 } 2230 2231 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size, 2232 &local_err); 2233 if (local_err) { 2234 error_propagate(errp, local_err); 2235 return false; 2236 } 2237 vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj)); 2238 xen_register_framebuffer(&s->vram); 2239 s->vram_ptr = memory_region_get_ram_ptr(&s->vram); 2240 s->get_bpp = vga_get_bpp; 2241 s->get_params = vga_get_params; 2242 s->get_resolution = vga_get_resolution; 2243 s->hw_ops = &vga_ops; 2244 switch (vga_retrace_method) { 2245 case VGA_RETRACE_DUMB: 2246 s->retrace = vga_dumb_retrace; 2247 s->update_retrace_info = vga_dumb_update_retrace_info; 2248 break; 2249 2250 case VGA_RETRACE_PRECISE: 2251 s->retrace = vga_precise_retrace; 2252 s->update_retrace_info = vga_precise_update_retrace_info; 2253 break; 2254 } 2255 2256 /* 2257 * Set default fb endian based on target, could probably be turned 2258 * into a device attribute set by the machine/platform to remove 2259 * all target endian dependencies from this file. 2260 */ 2261 s->default_endian_fb = target_words_bigendian(); 2262 2263 vga_dirty_log_start(s); 2264 2265 return true; 2266 } 2267 2268 static const MemoryRegionPortio vga_portio_list[] = { 2269 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */ 2270 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */ 2271 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */ 2272 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */ 2273 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */ 2274 PORTIO_END_OF_LIST(), 2275 }; 2276 2277 static const MemoryRegionPortio vbe_portio_list_x86[] = { 2278 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index }, 2279 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2280 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2281 PORTIO_END_OF_LIST(), 2282 }; 2283 2284 static const MemoryRegionPortio vbe_portio_list_no_x86[] = { 2285 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index }, 2286 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, 2287 PORTIO_END_OF_LIST(), 2288 }; 2289 2290 /* Used by both ISA and PCI */ 2291 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj, 2292 const MemoryRegionPortio **vga_ports, 2293 const MemoryRegionPortio **vbe_ports) 2294 { 2295 MemoryRegion *vga_mem; 2296 MachineState *ms = MACHINE(qdev_get_machine()); 2297 2298 /* 2299 * We unfortunately need two VBE lists since non-x86 machines might 2300 * not be able to do 16-bit accesses at unaligned addresses (0x1cf) 2301 */ 2302 if (object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE)) { 2303 *vbe_ports = vbe_portio_list_x86; 2304 } else { 2305 *vbe_ports = vbe_portio_list_no_x86; 2306 } 2307 2308 *vga_ports = vga_portio_list; 2309 2310 vga_mem = g_malloc(sizeof(*vga_mem)); 2311 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s, 2312 "vga-lowmem", 0x20000); 2313 memory_region_set_flush_coalesced(vga_mem); 2314 2315 return vga_mem; 2316 } 2317 2318 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space, 2319 MemoryRegion *address_space_io, bool init_vga_ports) 2320 { 2321 MemoryRegion *vga_io_memory; 2322 const MemoryRegionPortio *vga_ports, *vbe_ports; 2323 2324 qemu_register_reset(vga_reset, s); 2325 2326 s->bank_offset = 0; 2327 2328 s->legacy_address_space = address_space; 2329 2330 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports); 2331 memory_region_add_subregion_overlap(address_space, 2332 0x000a0000, 2333 vga_io_memory, 2334 1); 2335 memory_region_set_coalescing(vga_io_memory); 2336 if (init_vga_ports) { 2337 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga"); 2338 portio_list_set_flush_coalesced(&s->vga_port_list); 2339 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0); 2340 } 2341 if (vbe_ports) { 2342 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe"); 2343 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce); 2344 } 2345 } 2346