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