hw/tcx.c

   1 /*
   2  * QEMU TCX Frame buffer
   3  *
   4  * Copyright (c) 2003-2005 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "sun4m.h"
  26 #include "console.h"
  27 #include "pixel_ops.h"
  28
  29 #define MAXX 1024
  30 #define MAXY 768
  31 #define TCX_DAC_NREGS 16
  32 #define TCX_THC_NREGS_8  0x081c
  33 #define TCX_THC_NREGS_24 0x1000
  34 #define TCX_TEC_NREGS    0x1000
  35
  36 typedef struct TCXState {
  37     target_phys_addr_t addr;
  38     DisplayState *ds;
  39     QEMUConsole *console;
  40     uint8_t *vram;
  41     uint32_t *vram24, *cplane;
  42     ram_addr_t vram_offset, vram24_offset, cplane_offset;
  43     uint16_t width, height, depth;
  44     uint8_t r[256], g[256], b[256];
  45     uint32_t palette[256];
  46     uint8_t dac_index, dac_state;
  47 } TCXState;
  48
  49 static void tcx_screen_dump(void *opaque, const char *filename);
  50 static void tcx24_screen_dump(void *opaque, const char *filename);
  51 static void tcx_invalidate_display(void *opaque);
  52 static void tcx24_invalidate_display(void *opaque);
  53
  54 static void update_palette_entries(TCXState *s, int start, int end)
  55 {
  56     int i;
  57     for(i = start; i < end; i++) {
  58         switch(s->ds->depth) {
  59         default:
  60         case 8:
  61             s->palette[i] = rgb_to_pixel8(s->r[i], s->g[i], s->b[i]);
  62             break;
  63         case 15:
  64             if (s->ds->bgr)
  65                 s->palette[i] = rgb_to_pixel15bgr(s->r[i], s->g[i], s->b[i]);
  66             else
  67                 s->palette[i] = rgb_to_pixel15(s->r[i], s->g[i], s->b[i]);
  68             break;
  69         case 16:
  70             if (s->ds->bgr)
  71                 s->palette[i] = rgb_to_pixel16bgr(s->r[i], s->g[i], s->b[i]);
  72             else
  73                 s->palette[i] = rgb_to_pixel16(s->r[i], s->g[i], s->b[i]);
  74             break;
  75         case 32:
  76             if (s->ds->bgr)
  77                 s->palette[i] = rgb_to_pixel32bgr(s->r[i], s->g[i], s->b[i]);
  78             else
  79                 s->palette[i] = rgb_to_pixel32(s->r[i], s->g[i], s->b[i]);
  80             break;
  81         }
  82     }
  83     if (s->depth == 24)
  84         tcx24_invalidate_display(s);
  85     else
  86         tcx_invalidate_display(s);
  87 }
  88
  89 static void tcx_draw_line32(TCXState *s1, uint8_t *d,
  90                             const uint8_t *s, int width)
  91 {
  92     int x;
  93     uint8_t val;
  94     uint32_t *p = (uint32_t *)d;
  95
  96     for(x = 0; x < width; x++) {
  97         val = *s++;
  98         *p++ = s1->palette[val];
  99     }
 100 }
 101
 102 static void tcx_draw_line16(TCXState *s1, uint8_t *d,
 103                             const uint8_t *s, int width)
 104 {
 105     int x;
 106     uint8_t val;
 107     uint16_t *p = (uint16_t *)d;
 108
 109     for(x = 0; x < width; x++) {
 110         val = *s++;
 111         *p++ = s1->palette[val];
 112     }
 113 }
 114
 115 static void tcx_draw_line8(TCXState *s1, uint8_t *d,
 116                            const uint8_t *s, int width)
 117 {
 118     int x;
 119     uint8_t val;
 120
 121     for(x = 0; x < width; x++) {
 122         val = *s++;
 123         *d++ = s1->palette[val];
 124     }
 125 }
 126
 127 /*
 128   XXX Could be much more optimal:
 129   * detect if line/page/whole screen is in 24 bit mode
 130   * if destination is also BGR, use memcpy
 131   */
 132 static inline void tcx24_draw_line32(TCXState *s1, uint8_t *d,
 133                                      const uint8_t *s, int width,
 134                                      const uint32_t *cplane,
 135                                      const uint32_t *s24)
 136 {
 137     int x, bgr, r, g, b;
 138     uint8_t val, *p8;
 139     uint32_t *p = (uint32_t *)d;
 140     uint32_t dval;
 141
 142     bgr = s1->ds->bgr;
 143     for(x = 0; x < width; x++, s++, s24++) {
 144         if ((be32_to_cpu(*cplane++) & 0xff000000) == 0x03000000) {
 145             // 24-bit direct, BGR order
 146             p8 = (uint8_t *)s24;
 147             p8++;
 148             b = *p8++;
 149             g = *p8++;
 150             r = *p8++;
 151             if (bgr)
 152                 dval = rgb_to_pixel32bgr(r, g, b);
 153             else
 154                 dval = rgb_to_pixel32(r, g, b);
 155         } else {
 156             val = *s;
 157             dval = s1->palette[val];
 158         }
 159         *p++ = dval;
 160     }
 161 }
 162
 163 static inline int check_dirty(ram_addr_t page, ram_addr_t page24,
 164                               ram_addr_t cpage)
 165 {
 166     int ret;
 167     unsigned int off;
 168
 169     ret = cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
 170     for (off = 0; off < TARGET_PAGE_SIZE * 4; off += TARGET_PAGE_SIZE) {
 171         ret |= cpu_physical_memory_get_dirty(page24 + off, VGA_DIRTY_FLAG);
 172         ret |= cpu_physical_memory_get_dirty(cpage + off, VGA_DIRTY_FLAG);
 173     }
 174     return ret;
 175 }
 176
 177 static inline void reset_dirty(TCXState *ts, ram_addr_t page_min,
 178                                ram_addr_t page_max, ram_addr_t page24,
 179                               ram_addr_t cpage)
 180 {
 181     cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 182                                     VGA_DIRTY_FLAG);
 183     page_min -= ts->vram_offset;
 184     page_max -= ts->vram_offset;
 185     cpu_physical_memory_reset_dirty(page24 + page_min * 4,
 186                                     page24 + page_max * 4 + TARGET_PAGE_SIZE,
 187                                     VGA_DIRTY_FLAG);
 188     cpu_physical_memory_reset_dirty(cpage + page_min * 4,
 189                                     cpage + page_max * 4 + TARGET_PAGE_SIZE,
 190                                     VGA_DIRTY_FLAG);
 191 }
 192
 193 /* Fixed line length 1024 allows us to do nice tricks not possible on
 194    VGA... */
 195 static void tcx_update_display(void *opaque)
 196 {
 197     TCXState *ts = opaque;
 198     ram_addr_t page, page_min, page_max;
 199     int y, y_start, dd, ds;
 200     uint8_t *d, *s;
 201     void (*f)(TCXState *s1, uint8_t *dst, const uint8_t *src, int width);
 202
 203     if (ts->ds->depth == 0)
 204         return;
 205     page = ts->vram_offset;
 206     y_start = -1;
 207     page_min = 0xffffffff;
 208     page_max = 0;
 209     d = ts->ds->data;
 210     s = ts->vram;
 211     dd = ts->ds->linesize;
 212     ds = 1024;
 213
 214     switch (ts->ds->depth) {
 215     case 32:
 216         f = tcx_draw_line32;
 217         break;
 218     case 15:
 219     case 16:
 220         f = tcx_draw_line16;
 221         break;
 222     default:
 223     case 8:
 224         f = tcx_draw_line8;
 225         break;
 226     case 0:
 227         return;
 228     }
 229
 230     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE) {
 231         if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) {
 232             if (y_start < 0)
 233                 y_start = y;
 234             if (page < page_min)
 235                 page_min = page;
 236             if (page > page_max)
 237                 page_max = page;
 238             f(ts, d, s, ts->width);
 239             d += dd;
 240             s += ds;
 241             f(ts, d, s, ts->width);
 242             d += dd;
 243             s += ds;
 244             f(ts, d, s, ts->width);
 245             d += dd;
 246             s += ds;
 247             f(ts, d, s, ts->width);
 248             d += dd;
 249             s += ds;
 250         } else {
 251             if (y_start >= 0) {
 252                 /* flush to display */
 253                 dpy_update(ts->ds, 0, y_start,
 254                            ts->width, y - y_start);
 255                 y_start = -1;
 256             }
 257             d += dd * 4;
 258             s += ds * 4;
 259         }
 260     }
 261     if (y_start >= 0) {
 262         /* flush to display */
 263         dpy_update(ts->ds, 0, y_start,
 264                    ts->width, y - y_start);
 265     }
 266     /* reset modified pages */
 267     if (page_min <= page_max) {
 268         cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 269                                         VGA_DIRTY_FLAG);
 270     }
 271 }
 272
 273 static void tcx24_update_display(void *opaque)
 274 {
 275     TCXState *ts = opaque;
 276     ram_addr_t page, page_min, page_max, cpage, page24;
 277     int y, y_start, dd, ds;
 278     uint8_t *d, *s;
 279     uint32_t *cptr, *s24;
 280
 281     if (ts->ds->depth != 32)
 282             return;
 283     page = ts->vram_offset;
 284     page24 = ts->vram24_offset;
 285     cpage = ts->cplane_offset;
 286     y_start = -1;
 287     page_min = 0xffffffff;
 288     page_max = 0;
 289     d = ts->ds->data;
 290     s = ts->vram;
 291     s24 = ts->vram24;
 292     cptr = ts->cplane;
 293     dd = ts->ds->linesize;
 294     ds = 1024;
 295
 296     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE,
 297             page24 += TARGET_PAGE_SIZE, cpage += TARGET_PAGE_SIZE) {
 298         if (check_dirty(page, page24, cpage)) {
 299             if (y_start < 0)
 300                 y_start = y;
 301             if (page < page_min)
 302                 page_min = page;
 303             if (page > page_max)
 304                 page_max = page;
 305             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 306             d += dd;
 307             s += ds;
 308             cptr += ds;
 309             s24 += ds;
 310             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 311             d += dd;
 312             s += ds;
 313             cptr += ds;
 314             s24 += ds;
 315             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 316             d += dd;
 317             s += ds;
 318             cptr += ds;
 319             s24 += ds;
 320             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 321             d += dd;
 322             s += ds;
 323             cptr += ds;
 324             s24 += ds;
 325         } else {
 326             if (y_start >= 0) {
 327                 /* flush to display */
 328                 dpy_update(ts->ds, 0, y_start,
 329                            ts->width, y - y_start);
 330                 y_start = -1;
 331             }
 332             d += dd * 4;
 333             s += ds * 4;
 334             cptr += ds * 4;
 335             s24 += ds * 4;
 336         }
 337     }
 338     if (y_start >= 0) {
 339         /* flush to display */
 340         dpy_update(ts->ds, 0, y_start,
 341                    ts->width, y - y_start);
 342     }
 343     /* reset modified pages */
 344     if (page_min <= page_max) {
 345         reset_dirty(ts, page_min, page_max, page24, cpage);
 346     }
 347 }
 348
 349 static void tcx_invalidate_display(void *opaque)
 350 {
 351     TCXState *s = opaque;
 352     int i;
 353
 354     for (i = 0; i < MAXX*MAXY; i += TARGET_PAGE_SIZE) {
 355         cpu_physical_memory_set_dirty(s->vram_offset + i);
 356     }
 357 }
 358
 359 static void tcx24_invalidate_display(void *opaque)
 360 {
 361     TCXState *s = opaque;
 362     int i;
 363
 364     tcx_invalidate_display(s);
 365     for (i = 0; i < MAXX*MAXY * 4; i += TARGET_PAGE_SIZE) {
 366         cpu_physical_memory_set_dirty(s->vram24_offset + i);
 367         cpu_physical_memory_set_dirty(s->cplane_offset + i);
 368     }
 369 }
 370
 371 static void tcx_save(QEMUFile *f, void *opaque)
 372 {
 373     TCXState *s = opaque;
 374
 375     qemu_put_be16s(f, &s->height);
 376     qemu_put_be16s(f, &s->width);
 377     qemu_put_be16s(f, &s->depth);
 378     qemu_put_buffer(f, s->r, 256);
 379     qemu_put_buffer(f, s->g, 256);
 380     qemu_put_buffer(f, s->b, 256);
 381     qemu_put_8s(f, &s->dac_index);
 382     qemu_put_8s(f, &s->dac_state);
 383 }
 384
 385 static int tcx_load(QEMUFile *f, void *opaque, int version_id)
 386 {
 387     TCXState *s = opaque;
 388     uint32_t dummy;
 389
 390     if (version_id != 3 && version_id != 4)
 391         return -EINVAL;
 392
 393     if (version_id == 3) {
 394         qemu_get_be32s(f, &dummy);
 395         qemu_get_be32s(f, &dummy);
 396         qemu_get_be32s(f, &dummy);
 397     }
 398     qemu_get_be16s(f, &s->height);
 399     qemu_get_be16s(f, &s->width);
 400     qemu_get_be16s(f, &s->depth);
 401     qemu_get_buffer(f, s->r, 256);
 402     qemu_get_buffer(f, s->g, 256);
 403     qemu_get_buffer(f, s->b, 256);
 404     qemu_get_8s(f, &s->dac_index);
 405     qemu_get_8s(f, &s->dac_state);
 406     update_palette_entries(s, 0, 256);
 407     if (s->depth == 24)
 408         tcx24_invalidate_display(s);
 409     else
 410         tcx_invalidate_display(s);
 411
 412     return 0;
 413 }
 414
 415 static void tcx_reset(void *opaque)
 416 {
 417     TCXState *s = opaque;
 418
 419     /* Initialize palette */
 420     memset(s->r, 0, 256);
 421     memset(s->g, 0, 256);
 422     memset(s->b, 0, 256);
 423     s->r[255] = s->g[255] = s->b[255] = 255;
 424     update_palette_entries(s, 0, 256);
 425     memset(s->vram, 0, MAXX*MAXY);
 426     cpu_physical_memory_reset_dirty(s->vram_offset, s->vram_offset +
 427                                     MAXX * MAXY * (1 + 4 + 4), VGA_DIRTY_FLAG);
 428     s->dac_index = 0;
 429     s->dac_state = 0;
 430 }
 431
 432 static uint32_t tcx_dac_readl(void *opaque, target_phys_addr_t addr)
 433 {
 434     return 0;
 435 }
 436
 437 static void tcx_dac_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 438 {
 439     TCXState *s = opaque;
 440     uint32_t saddr;
 441
 442     saddr = (addr & (TCX_DAC_NREGS - 1)) >> 2;
 443     switch (saddr) {
 444     case 0:
 445         s->dac_index = val >> 24;
 446         s->dac_state = 0;
 447         break;
 448     case 1:
 449         switch (s->dac_state) {
 450         case 0:
 451             s->r[s->dac_index] = val >> 24;
 452             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 453             s->dac_state++;
 454             break;
 455         case 1:
 456             s->g[s->dac_index] = val >> 24;
 457             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 458             s->dac_state++;
 459             break;
 460         case 2:
 461             s->b[s->dac_index] = val >> 24;
 462             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 463             s->dac_index = (s->dac_index + 1) & 255; // Index autoincrement
 464         default:
 465             s->dac_state = 0;
 466             break;
 467         }
 468         break;
 469     default:
 470         break;
 471     }
 472     return;
 473 }
 474
 475 static CPUReadMemoryFunc *tcx_dac_read[3] = {
 476     NULL,
 477     NULL,
 478     tcx_dac_readl,
 479 };
 480
 481 static CPUWriteMemoryFunc *tcx_dac_write[3] = {
 482     NULL,
 483     NULL,
 484     tcx_dac_writel,
 485 };
 486
 487 static uint32_t tcx_dummy_readl(void *opaque, target_phys_addr_t addr)
 488 {
 489     return 0;
 490 }
 491
 492 static void tcx_dummy_writel(void *opaque, target_phys_addr_t addr,
 493                              uint32_t val)
 494 {
 495 }
 496
 497 static CPUReadMemoryFunc *tcx_dummy_read[3] = {
 498     NULL,
 499     NULL,
 500     tcx_dummy_readl,
 501 };
 502
 503 static CPUWriteMemoryFunc *tcx_dummy_write[3] = {
 504     NULL,
 505     NULL,
 506     tcx_dummy_writel,
 507 };
 508
 509 void tcx_init(DisplayState *ds, target_phys_addr_t addr, uint8_t *vram_base,
 510               unsigned long vram_offset, int vram_size, int width, int height,
 511               int depth)
 512 {
 513     TCXState *s;
 514     int io_memory, dummy_memory;
 515     int size;
 516
 517     s = qemu_mallocz(sizeof(TCXState));
 518     if (!s)
 519         return;
 520     s->ds = ds;
 521     s->addr = addr;
 522     s->vram_offset = vram_offset;
 523     s->width = width;
 524     s->height = height;
 525     s->depth = depth;
 526
 527     // 8-bit plane
 528     s->vram = vram_base;
 529     size = vram_size;
 530     cpu_register_physical_memory(addr + 0x00800000ULL, size, vram_offset);
 531     vram_offset += size;
 532     vram_base += size;
 533
 534     io_memory = cpu_register_io_memory(0, tcx_dac_read, tcx_dac_write, s);
 535     cpu_register_physical_memory(addr + 0x00200000ULL, TCX_DAC_NREGS,
 536                                  io_memory);
 537
 538     dummy_memory = cpu_register_io_memory(0, tcx_dummy_read, tcx_dummy_write,
 539                                           s);
 540     cpu_register_physical_memory(addr + 0x00700000ULL, TCX_TEC_NREGS,
 541                                  dummy_memory);
 542     if (depth == 24) {
 543         // 24-bit plane
 544         size = vram_size * 4;
 545         s->vram24 = (uint32_t *)vram_base;
 546         s->vram24_offset = vram_offset;
 547         cpu_register_physical_memory(addr + 0x02000000ULL, size, vram_offset);
 548         vram_offset += size;
 549         vram_base += size;
 550
 551         // Control plane
 552         size = vram_size * 4;
 553         s->cplane = (uint32_t *)vram_base;
 554         s->cplane_offset = vram_offset;
 555         cpu_register_physical_memory(addr + 0x0a000000ULL, size, vram_offset);
 556         s->console = graphic_console_init(s->ds, tcx24_update_display,
 557                                           tcx24_invalidate_display,
 558                                           tcx24_screen_dump, NULL, s);
 559     } else {
 560         cpu_register_physical_memory(addr + 0x00300000ULL, TCX_THC_NREGS_8,
 561                                      dummy_memory);
 562         s->console = graphic_console_init(s->ds, tcx_update_display,
 563                                           tcx_invalidate_display,
 564                                           tcx_screen_dump, NULL, s);
 565     }
 566     // NetBSD writes here even with 8-bit display
 567     cpu_register_physical_memory(addr + 0x00301000ULL, TCX_THC_NREGS_24,
 568                                  dummy_memory);
 569
 570     register_savevm("tcx", addr, 4, tcx_save, tcx_load, s);
 571     qemu_register_reset(tcx_reset, s);
 572     tcx_reset(s);
 573     qemu_console_resize(s->console, width, height);
 574 }
 575
 576 static void tcx_screen_dump(void *opaque, const char *filename)
 577 {
 578     TCXState *s = opaque;
 579     FILE *f;
 580     uint8_t *d, *d1, v;
 581     int y, x;
 582
 583     f = fopen(filename, "wb");
 584     if (!f)
 585         return;
 586     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 587     d1 = s->vram;
 588     for(y = 0; y < s->height; y++) {
 589         d = d1;
 590         for(x = 0; x < s->width; x++) {
 591             v = *d;
 592             fputc(s->r[v], f);
 593             fputc(s->g[v], f);
 594             fputc(s->b[v], f);
 595             d++;
 596         }
 597         d1 += MAXX;
 598     }
 599     fclose(f);
 600     return;
 601 }
 602
 603 static void tcx24_screen_dump(void *opaque, const char *filename)
 604 {
 605     TCXState *s = opaque;
 606     FILE *f;
 607     uint8_t *d, *d1, v;
 608     uint32_t *s24, *cptr, dval;
 609     int y, x;
 610
 611     f = fopen(filename, "wb");
 612     if (!f)
 613         return;
 614     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 615     d1 = s->vram;
 616     s24 = s->vram24;
 617     cptr = s->cplane;
 618     for(y = 0; y < s->height; y++) {
 619         d = d1;
 620         for(x = 0; x < s->width; x++, d++, s24++) {
 621             if ((*cptr++ & 0xff000000) == 0x03000000) { // 24-bit direct
 622                 dval = *s24 & 0x00ffffff;
 623                 fputc((dval >> 16) & 0xff, f);
 624                 fputc((dval >> 8) & 0xff, f);
 625                 fputc(dval & 0xff, f);
 626             } else {
 627                 v = *d;
 628                 fputc(s->r[v], f);
 629                 fputc(s->g[v], f);
 630                 fputc(s->b[v], f);
 631             }
 632         }
 633         d1 += MAXX;
 634     }
 635     fclose(f);
 636     return;
 637 }