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
  25 #include "sun4m.h"
  26 #include "console.h"
  27 #include "pixel_ops.h"
  28 #include "sysbus.h"
  29 #include "qdev-addr.h"
  30
  31 #define MAXX 1024
  32 #define MAXY 768
  33 #define TCX_DAC_NREGS 16
  34 #define TCX_THC_NREGS_8  0x081c
  35 #define TCX_THC_NREGS_24 0x1000
  36 #define TCX_TEC_NREGS    0x1000
  37
  38 typedef struct TCXState {
  39     SysBusDevice busdev;
  40     target_phys_addr_t addr;
  41     DisplayState *ds;
  42     uint8_t *vram;
  43     uint32_t *vram24, *cplane;
  44     ram_addr_t vram_offset, vram24_offset, cplane_offset;
  45     uint32_t vram_size;
  46     uint16_t width, height, depth;
  47     uint8_t r[256], g[256], b[256];
  48     uint32_t palette[256];
  49     uint8_t dac_index, dac_state;
  50 } TCXState;
  51
  52 static void tcx_screen_dump(void *opaque, const char *filename);
  53 static void tcx24_screen_dump(void *opaque, const char *filename);
  54
  55 static void tcx_set_dirty(TCXState *s)
  56 {
  57     unsigned int i;
  58
  59     for (i = 0; i < MAXX * MAXY; i += TARGET_PAGE_SIZE) {
  60         cpu_physical_memory_set_dirty(s->vram_offset + i);
  61     }
  62 }
  63
  64 static void tcx24_set_dirty(TCXState *s)
  65 {
  66     unsigned int i;
  67
  68     for (i = 0; i < MAXX * MAXY * 4; i += TARGET_PAGE_SIZE) {
  69         cpu_physical_memory_set_dirty(s->vram24_offset + i);
  70         cpu_physical_memory_set_dirty(s->cplane_offset + i);
  71     }
  72 }
  73
  74 static void update_palette_entries(TCXState *s, int start, int end)
  75 {
  76     int i;
  77     for(i = start; i < end; i++) {
  78         switch(ds_get_bits_per_pixel(s->ds)) {
  79         default:
  80         case 8:
  81             s->palette[i] = rgb_to_pixel8(s->r[i], s->g[i], s->b[i]);
  82             break;
  83         case 15:
  84             s->palette[i] = rgb_to_pixel15(s->r[i], s->g[i], s->b[i]);
  85             break;
  86         case 16:
  87             s->palette[i] = rgb_to_pixel16(s->r[i], s->g[i], s->b[i]);
  88             break;
  89         case 32:
  90             if (is_surface_bgr(s->ds->surface))
  91                 s->palette[i] = rgb_to_pixel32bgr(s->r[i], s->g[i], s->b[i]);
  92             else
  93                 s->palette[i] = rgb_to_pixel32(s->r[i], s->g[i], s->b[i]);
  94             break;
  95         }
  96     }
  97     if (s->depth == 24) {
  98         tcx24_set_dirty(s);
  99     } else {
 100         tcx_set_dirty(s);
 101     }
 102 }
 103
 104 static void tcx_draw_line32(TCXState *s1, uint8_t *d,
 105                             const uint8_t *s, int width)
 106 {
 107     int x;
 108     uint8_t val;
 109     uint32_t *p = (uint32_t *)d;
 110
 111     for(x = 0; x < width; x++) {
 112         val = *s++;
 113         *p++ = s1->palette[val];
 114     }
 115 }
 116
 117 static void tcx_draw_line16(TCXState *s1, uint8_t *d,
 118                             const uint8_t *s, int width)
 119 {
 120     int x;
 121     uint8_t val;
 122     uint16_t *p = (uint16_t *)d;
 123
 124     for(x = 0; x < width; x++) {
 125         val = *s++;
 126         *p++ = s1->palette[val];
 127     }
 128 }
 129
 130 static void tcx_draw_line8(TCXState *s1, uint8_t *d,
 131                            const uint8_t *s, int width)
 132 {
 133     int x;
 134     uint8_t val;
 135
 136     for(x = 0; x < width; x++) {
 137         val = *s++;
 138         *d++ = s1->palette[val];
 139     }
 140 }
 141
 142 /*
 143   XXX Could be much more optimal:
 144   * detect if line/page/whole screen is in 24 bit mode
 145   * if destination is also BGR, use memcpy
 146   */
 147 static inline void tcx24_draw_line32(TCXState *s1, uint8_t *d,
 148                                      const uint8_t *s, int width,
 149                                      const uint32_t *cplane,
 150                                      const uint32_t *s24)
 151 {
 152     int x, bgr, r, g, b;
 153     uint8_t val, *p8;
 154     uint32_t *p = (uint32_t *)d;
 155     uint32_t dval;
 156
 157     bgr = is_surface_bgr(s1->ds->surface);
 158     for(x = 0; x < width; x++, s++, s24++) {
 159         if ((be32_to_cpu(*cplane++) & 0xff000000) == 0x03000000) {
 160             // 24-bit direct, BGR order
 161             p8 = (uint8_t *)s24;
 162             p8++;
 163             b = *p8++;
 164             g = *p8++;
 165             r = *p8++;
 166             if (bgr)
 167                 dval = rgb_to_pixel32bgr(r, g, b);
 168             else
 169                 dval = rgb_to_pixel32(r, g, b);
 170         } else {
 171             val = *s;
 172             dval = s1->palette[val];
 173         }
 174         *p++ = dval;
 175     }
 176 }
 177
 178 static inline int check_dirty(ram_addr_t page, ram_addr_t page24,
 179                               ram_addr_t cpage)
 180 {
 181     int ret;
 182     unsigned int off;
 183
 184     ret = cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
 185     for (off = 0; off < TARGET_PAGE_SIZE * 4; off += TARGET_PAGE_SIZE) {
 186         ret |= cpu_physical_memory_get_dirty(page24 + off, VGA_DIRTY_FLAG);
 187         ret |= cpu_physical_memory_get_dirty(cpage + off, VGA_DIRTY_FLAG);
 188     }
 189     return ret;
 190 }
 191
 192 static inline void reset_dirty(TCXState *ts, ram_addr_t page_min,
 193                                ram_addr_t page_max, ram_addr_t page24,
 194                               ram_addr_t cpage)
 195 {
 196     cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 197                                     VGA_DIRTY_FLAG);
 198     page_min -= ts->vram_offset;
 199     page_max -= ts->vram_offset;
 200     cpu_physical_memory_reset_dirty(page24 + page_min * 4,
 201                                     page24 + page_max * 4 + TARGET_PAGE_SIZE,
 202                                     VGA_DIRTY_FLAG);
 203     cpu_physical_memory_reset_dirty(cpage + page_min * 4,
 204                                     cpage + page_max * 4 + TARGET_PAGE_SIZE,
 205                                     VGA_DIRTY_FLAG);
 206 }
 207
 208 /* Fixed line length 1024 allows us to do nice tricks not possible on
 209    VGA... */
 210 static void tcx_update_display(void *opaque)
 211 {
 212     TCXState *ts = opaque;
 213     ram_addr_t page, page_min, page_max;
 214     int y, y_start, dd, ds;
 215     uint8_t *d, *s;
 216     void (*f)(TCXState *s1, uint8_t *dst, const uint8_t *src, int width);
 217
 218     if (ds_get_bits_per_pixel(ts->ds) == 0)
 219         return;
 220     page = ts->vram_offset;
 221     y_start = -1;
 222     page_min = -1;
 223     page_max = 0;
 224     d = ds_get_data(ts->ds);
 225     s = ts->vram;
 226     dd = ds_get_linesize(ts->ds);
 227     ds = 1024;
 228
 229     switch (ds_get_bits_per_pixel(ts->ds)) {
 230     case 32:
 231         f = tcx_draw_line32;
 232         break;
 233     case 15:
 234     case 16:
 235         f = tcx_draw_line16;
 236         break;
 237     default:
 238     case 8:
 239         f = tcx_draw_line8;
 240         break;
 241     case 0:
 242         return;
 243     }
 244
 245     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE) {
 246         if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) {
 247             if (y_start < 0)
 248                 y_start = y;
 249             if (page < page_min)
 250                 page_min = page;
 251             if (page > page_max)
 252                 page_max = page;
 253             f(ts, d, s, ts->width);
 254             d += dd;
 255             s += ds;
 256             f(ts, d, s, ts->width);
 257             d += dd;
 258             s += ds;
 259             f(ts, d, s, ts->width);
 260             d += dd;
 261             s += ds;
 262             f(ts, d, s, ts->width);
 263             d += dd;
 264             s += ds;
 265         } else {
 266             if (y_start >= 0) {
 267                 /* flush to display */
 268                 dpy_update(ts->ds, 0, y_start,
 269                            ts->width, y - y_start);
 270                 y_start = -1;
 271             }
 272             d += dd * 4;
 273             s += ds * 4;
 274         }
 275     }
 276     if (y_start >= 0) {
 277         /* flush to display */
 278         dpy_update(ts->ds, 0, y_start,
 279                    ts->width, y - y_start);
 280     }
 281     /* reset modified pages */
 282     if (page_max >= page_min) {
 283         cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
 284                                         VGA_DIRTY_FLAG);
 285     }
 286 }
 287
 288 static void tcx24_update_display(void *opaque)
 289 {
 290     TCXState *ts = opaque;
 291     ram_addr_t page, page_min, page_max, cpage, page24;
 292     int y, y_start, dd, ds;
 293     uint8_t *d, *s;
 294     uint32_t *cptr, *s24;
 295
 296     if (ds_get_bits_per_pixel(ts->ds) != 32)
 297             return;
 298     page = ts->vram_offset;
 299     page24 = ts->vram24_offset;
 300     cpage = ts->cplane_offset;
 301     y_start = -1;
 302     page_min = -1;
 303     page_max = 0;
 304     d = ds_get_data(ts->ds);
 305     s = ts->vram;
 306     s24 = ts->vram24;
 307     cptr = ts->cplane;
 308     dd = ds_get_linesize(ts->ds);
 309     ds = 1024;
 310
 311     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE,
 312             page24 += TARGET_PAGE_SIZE, cpage += TARGET_PAGE_SIZE) {
 313         if (check_dirty(page, page24, cpage)) {
 314             if (y_start < 0)
 315                 y_start = y;
 316             if (page < page_min)
 317                 page_min = page;
 318             if (page > page_max)
 319                 page_max = page;
 320             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 321             d += dd;
 322             s += ds;
 323             cptr += ds;
 324             s24 += ds;
 325             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 326             d += dd;
 327             s += ds;
 328             cptr += ds;
 329             s24 += ds;
 330             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 331             d += dd;
 332             s += ds;
 333             cptr += ds;
 334             s24 += ds;
 335             tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
 336             d += dd;
 337             s += ds;
 338             cptr += ds;
 339             s24 += ds;
 340         } else {
 341             if (y_start >= 0) {
 342                 /* flush to display */
 343                 dpy_update(ts->ds, 0, y_start,
 344                            ts->width, y - y_start);
 345                 y_start = -1;
 346             }
 347             d += dd * 4;
 348             s += ds * 4;
 349             cptr += ds * 4;
 350             s24 += ds * 4;
 351         }
 352     }
 353     if (y_start >= 0) {
 354         /* flush to display */
 355         dpy_update(ts->ds, 0, y_start,
 356                    ts->width, y - y_start);
 357     }
 358     /* reset modified pages */
 359     if (page_max >= page_min) {
 360         reset_dirty(ts, page_min, page_max, page24, cpage);
 361     }
 362 }
 363
 364 static void tcx_invalidate_display(void *opaque)
 365 {
 366     TCXState *s = opaque;
 367
 368     tcx_set_dirty(s);
 369     qemu_console_resize(s->ds, s->width, s->height);
 370 }
 371
 372 static void tcx24_invalidate_display(void *opaque)
 373 {
 374     TCXState *s = opaque;
 375
 376     tcx_set_dirty(s);
 377     tcx24_set_dirty(s);
 378     qemu_console_resize(s->ds, s->width, s->height);
 379 }
 380
 381 static int vmstate_tcx_after_load(void *opaque)
 382 {
 383     TCXState *s = opaque;
 384
 385     update_palette_entries(s, 0, 256);
 386     if (s->depth == 24) {
 387         tcx24_set_dirty(s);
 388     } else {
 389         tcx_set_dirty(s);
 390     }
 391
 392     return 0;
 393 }
 394
 395 static const VMStateDescription vmstate_tcx = {
 396     .name ="tcx",
 397     .version_id = 4,
 398     .minimum_version_id = 4,
 399     .minimum_version_id_old = 4,
 400     .run_after_load = vmstate_tcx_after_load,
 401     .fields      = (VMStateField []) {
 402         VMSTATE_UINT16(height, TCXState),
 403         VMSTATE_UINT16(width, TCXState),
 404         VMSTATE_UINT16(depth, TCXState),
 405         VMSTATE_BUFFER(r, TCXState),
 406         VMSTATE_BUFFER(g, TCXState),
 407         VMSTATE_BUFFER(b, TCXState),
 408         VMSTATE_UINT8(dac_index, TCXState),
 409         VMSTATE_UINT8(dac_state, TCXState),
 410         VMSTATE_END_OF_LIST()
 411     }
 412 };
 413
 414 static void tcx_reset(void *opaque)
 415 {
 416     TCXState *s = opaque;
 417
 418     /* Initialize palette */
 419     memset(s->r, 0, 256);
 420     memset(s->g, 0, 256);
 421     memset(s->b, 0, 256);
 422     s->r[255] = s->g[255] = s->b[255] = 255;
 423     update_palette_entries(s, 0, 256);
 424     memset(s->vram, 0, MAXX*MAXY);
 425     cpu_physical_memory_reset_dirty(s->vram_offset, s->vram_offset +
 426                                     MAXX * MAXY * (1 + 4 + 4), VGA_DIRTY_FLAG);
 427     s->dac_index = 0;
 428     s->dac_state = 0;
 429 }
 430
 431 static uint32_t tcx_dac_readl(void *opaque, target_phys_addr_t addr)
 432 {
 433     return 0;
 434 }
 435
 436 static void tcx_dac_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 437 {
 438     TCXState *s = opaque;
 439
 440     switch (addr) {
 441     case 0:
 442         s->dac_index = val >> 24;
 443         s->dac_state = 0;
 444         break;
 445     case 4:
 446         switch (s->dac_state) {
 447         case 0:
 448             s->r[s->dac_index] = val >> 24;
 449             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 450             s->dac_state++;
 451             break;
 452         case 1:
 453             s->g[s->dac_index] = val >> 24;
 454             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 455             s->dac_state++;
 456             break;
 457         case 2:
 458             s->b[s->dac_index] = val >> 24;
 459             update_palette_entries(s, s->dac_index, s->dac_index + 1);
 460             s->dac_index = (s->dac_index + 1) & 255; // Index autoincrement
 461         default:
 462             s->dac_state = 0;
 463             break;
 464         }
 465         break;
 466     default:
 467         break;
 468     }
 469     return;
 470 }
 471
 472 static CPUReadMemoryFunc * const tcx_dac_read[3] = {
 473     NULL,
 474     NULL,
 475     tcx_dac_readl,
 476 };
 477
 478 static CPUWriteMemoryFunc * const tcx_dac_write[3] = {
 479     NULL,
 480     NULL,
 481     tcx_dac_writel,
 482 };
 483
 484 static uint32_t tcx_dummy_readl(void *opaque, target_phys_addr_t addr)
 485 {
 486     return 0;
 487 }
 488
 489 static void tcx_dummy_writel(void *opaque, target_phys_addr_t addr,
 490                              uint32_t val)
 491 {
 492 }
 493
 494 static CPUReadMemoryFunc * const tcx_dummy_read[3] = {
 495     NULL,
 496     NULL,
 497     tcx_dummy_readl,
 498 };
 499
 500 static CPUWriteMemoryFunc * const tcx_dummy_write[3] = {
 501     NULL,
 502     NULL,
 503     tcx_dummy_writel,
 504 };
 505
 506 static int tcx_init1(SysBusDevice *dev)
 507 {
 508     TCXState *s = FROM_SYSBUS(TCXState, dev);
 509     int io_memory, dummy_memory;
 510     ram_addr_t vram_offset;
 511     int size;
 512     uint8_t *vram_base;
 513
 514     vram_offset = qemu_ram_alloc(s->vram_size * (1 + 4 + 4));
 515     vram_base = qemu_get_ram_ptr(vram_offset);
 516     s->vram_offset = vram_offset;
 517
 518     /* 8-bit plane */
 519     s->vram = vram_base;
 520     size = s->vram_size;
 521     sysbus_init_mmio(dev, size, s->vram_offset);
 522     vram_offset += size;
 523     vram_base += size;
 524
 525     /* DAC */
 526     io_memory = cpu_register_io_memory(tcx_dac_read, tcx_dac_write, s);
 527     sysbus_init_mmio(dev, TCX_DAC_NREGS, io_memory);
 528
 529     /* TEC (dummy) */
 530     dummy_memory = cpu_register_io_memory(tcx_dummy_read, tcx_dummy_write,
 531                                           s);
 532     sysbus_init_mmio(dev, TCX_TEC_NREGS, dummy_memory);
 533     /* THC: NetBSD writes here even with 8-bit display: dummy */
 534     sysbus_init_mmio(dev, TCX_THC_NREGS_24, dummy_memory);
 535
 536     if (s->depth == 24) {
 537         /* 24-bit plane */
 538         size = s->vram_size * 4;
 539         s->vram24 = (uint32_t *)vram_base;
 540         s->vram24_offset = vram_offset;
 541         sysbus_init_mmio(dev, size, vram_offset);
 542         vram_offset += size;
 543         vram_base += size;
 544
 545         /* Control plane */
 546         size = s->vram_size * 4;
 547         s->cplane = (uint32_t *)vram_base;
 548         s->cplane_offset = vram_offset;
 549         sysbus_init_mmio(dev, size, vram_offset);
 550
 551         s->ds = graphic_console_init(tcx24_update_display,
 552                                      tcx24_invalidate_display,
 553                                      tcx24_screen_dump, NULL, s);
 554     } else {
 555         /* THC 8 bit (dummy) */
 556         sysbus_init_mmio(dev, TCX_THC_NREGS_8, dummy_memory);
 557
 558         s->ds = graphic_console_init(tcx_update_display,
 559                                      tcx_invalidate_display,
 560                                      tcx_screen_dump, NULL, s);
 561     }
 562
 563     vmstate_register(-1, &vmstate_tcx, s);
 564     qemu_register_reset(tcx_reset, s);
 565     tcx_reset(s);
 566     qemu_console_resize(s->ds, s->width, s->height);
 567     return 0;
 568 }
 569
 570 static void tcx_screen_dump(void *opaque, const char *filename)
 571 {
 572     TCXState *s = opaque;
 573     FILE *f;
 574     uint8_t *d, *d1, v;
 575     int y, x;
 576
 577     f = fopen(filename, "wb");
 578     if (!f)
 579         return;
 580     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 581     d1 = s->vram;
 582     for(y = 0; y < s->height; y++) {
 583         d = d1;
 584         for(x = 0; x < s->width; x++) {
 585             v = *d;
 586             fputc(s->r[v], f);
 587             fputc(s->g[v], f);
 588             fputc(s->b[v], f);
 589             d++;
 590         }
 591         d1 += MAXX;
 592     }
 593     fclose(f);
 594     return;
 595 }
 596
 597 static void tcx24_screen_dump(void *opaque, const char *filename)
 598 {
 599     TCXState *s = opaque;
 600     FILE *f;
 601     uint8_t *d, *d1, v;
 602     uint32_t *s24, *cptr, dval;
 603     int y, x;
 604
 605     f = fopen(filename, "wb");
 606     if (!f)
 607         return;
 608     fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
 609     d1 = s->vram;
 610     s24 = s->vram24;
 611     cptr = s->cplane;
 612     for(y = 0; y < s->height; y++) {
 613         d = d1;
 614         for(x = 0; x < s->width; x++, d++, s24++) {
 615             if ((*cptr++ & 0xff000000) == 0x03000000) { // 24-bit direct
 616                 dval = *s24 & 0x00ffffff;
 617                 fputc((dval >> 16) & 0xff, f);
 618                 fputc((dval >> 8) & 0xff, f);
 619                 fputc(dval & 0xff, f);
 620             } else {
 621                 v = *d;
 622                 fputc(s->r[v], f);
 623                 fputc(s->g[v], f);
 624                 fputc(s->b[v], f);
 625             }
 626         }
 627         d1 += MAXX;
 628     }
 629     fclose(f);
 630     return;
 631 }
 632
 633 static SysBusDeviceInfo tcx_info = {
 634     .init = tcx_init1,
 635     .qdev.name  = "SUNW,tcx",
 636     .qdev.size  = sizeof(TCXState),
 637     .qdev.props = (Property[]) {
 638         DEFINE_PROP_TADDR("addr",      TCXState, addr,      -1),
 639         DEFINE_PROP_HEX32("vram_size", TCXState, vram_size, -1),
 640         DEFINE_PROP_UINT16("width",    TCXState, width,     -1),
 641         DEFINE_PROP_UINT16("height",   TCXState, height,    -1),
 642         DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1),
 643         DEFINE_PROP_END_OF_LIST(),
 644     }
 645 };
 646
 647 static void tcx_register_devices(void)
 648 {
 649     sysbus_register_withprop(&tcx_info);
 650 }
 651
 652 device_init(tcx_register_devices)