g364fb.c (16639B)
1 /* 2 * QEMU G364 framebuffer Emulator. 3 * 4 * Copyright (c) 2007-2011 Herve Poussineau 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu/units.h" 22 #include "hw/hw.h" 23 #include "hw/irq.h" 24 #include "hw/qdev-properties.h" 25 #include "qapi/error.h" 26 #include "qemu/error-report.h" 27 #include "qemu/module.h" 28 #include "ui/console.h" 29 #include "ui/pixel_ops.h" 30 #include "trace.h" 31 #include "hw/sysbus.h" 32 #include "migration/vmstate.h" 33 #include "qom/object.h" 34 35 typedef struct G364State { 36 /* hardware */ 37 uint32_t vram_size; 38 qemu_irq irq; 39 MemoryRegion mem_vram; 40 MemoryRegion mem_ctrl; 41 /* registers */ 42 uint8_t color_palette[256][3]; 43 uint8_t cursor_palette[3][3]; 44 uint16_t cursor[512]; 45 uint32_t cursor_position; 46 uint32_t ctla; 47 uint32_t top_of_screen; 48 uint32_t width, height; /* in pixels */ 49 /* display refresh support */ 50 QemuConsole *con; 51 int depth; 52 int blanked; 53 } G364State; 54 55 #define REG_BOOT 0x000000 56 #define REG_DISPLAY 0x000118 57 #define REG_VDISPLAY 0x000150 58 #define REG_CTLA 0x000300 59 #define REG_TOP 0x000400 60 #define REG_CURS_PAL 0x000508 61 #define REG_CURS_POS 0x000638 62 #define REG_CLR_PAL 0x000800 63 #define REG_CURS_PAT 0x001000 64 #define REG_RESET 0x100000 65 66 #define CTLA_FORCE_BLANK 0x00000400 67 #define CTLA_NO_CURSOR 0x00800000 68 69 #define G364_PAGE_SIZE 4096 70 71 static inline int check_dirty(G364State *s, DirtyBitmapSnapshot *snap, ram_addr_t page) 72 { 73 return memory_region_snapshot_get_dirty(&s->mem_vram, snap, page, G364_PAGE_SIZE); 74 } 75 76 static void g364fb_draw_graphic8(G364State *s) 77 { 78 DisplaySurface *surface = qemu_console_surface(s->con); 79 DirtyBitmapSnapshot *snap; 80 int i, w; 81 uint8_t *vram; 82 uint8_t *data_display, *dd; 83 ram_addr_t page; 84 int x, y; 85 int xmin, xmax; 86 int ymin, ymax; 87 int xcursor, ycursor; 88 unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b); 89 90 switch (surface_bits_per_pixel(surface)) { 91 case 8: 92 rgb_to_pixel = rgb_to_pixel8; 93 w = 1; 94 break; 95 case 15: 96 rgb_to_pixel = rgb_to_pixel15; 97 w = 2; 98 break; 99 case 16: 100 rgb_to_pixel = rgb_to_pixel16; 101 w = 2; 102 break; 103 case 32: 104 rgb_to_pixel = rgb_to_pixel32; 105 w = 4; 106 break; 107 default: 108 hw_error("g364: unknown host depth %d", 109 surface_bits_per_pixel(surface)); 110 return; 111 } 112 113 page = 0; 114 115 x = y = 0; 116 xmin = s->width; 117 xmax = 0; 118 ymin = s->height; 119 ymax = 0; 120 121 if (!(s->ctla & CTLA_NO_CURSOR)) { 122 xcursor = s->cursor_position >> 12; 123 ycursor = s->cursor_position & 0xfff; 124 } else { 125 xcursor = ycursor = -65; 126 } 127 128 vram = memory_region_get_ram_ptr(&s->mem_vram) + s->top_of_screen; 129 /* XXX: out of range in vram? */ 130 data_display = dd = surface_data(surface); 131 snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0, s->vram_size, 132 DIRTY_MEMORY_VGA); 133 while (y < s->height) { 134 if (check_dirty(s, snap, page)) { 135 if (y < ymin) 136 ymin = ymax = y; 137 if (x < xmin) 138 xmin = x; 139 for (i = 0; i < G364_PAGE_SIZE; i++) { 140 uint8_t index; 141 unsigned int color; 142 if (unlikely((y >= ycursor && y < ycursor + 64) && 143 (x >= xcursor && x < xcursor + 64))) { 144 /* pointer area */ 145 int xdiff = x - xcursor; 146 uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8]; 147 int op = (curs >> ((xdiff & 7) * 2)) & 3; 148 if (likely(op == 0)) { 149 /* transparent */ 150 index = *vram; 151 color = (*rgb_to_pixel)( 152 s->color_palette[index][0], 153 s->color_palette[index][1], 154 s->color_palette[index][2]); 155 } else { 156 /* get cursor color */ 157 index = op - 1; 158 color = (*rgb_to_pixel)( 159 s->cursor_palette[index][0], 160 s->cursor_palette[index][1], 161 s->cursor_palette[index][2]); 162 } 163 } else { 164 /* normal area */ 165 index = *vram; 166 color = (*rgb_to_pixel)( 167 s->color_palette[index][0], 168 s->color_palette[index][1], 169 s->color_palette[index][2]); 170 } 171 memcpy(dd, &color, w); 172 dd += w; 173 x++; 174 vram++; 175 if (x == s->width) { 176 xmax = s->width - 1; 177 y++; 178 if (y == s->height) { 179 ymax = s->height - 1; 180 goto done; 181 } 182 data_display = dd = data_display + surface_stride(surface); 183 xmin = 0; 184 x = 0; 185 } 186 } 187 if (x > xmax) 188 xmax = x; 189 if (y > ymax) 190 ymax = y; 191 } else { 192 int dy; 193 if (xmax || ymax) { 194 dpy_gfx_update(s->con, xmin, ymin, 195 xmax - xmin + 1, ymax - ymin + 1); 196 xmin = s->width; 197 xmax = 0; 198 ymin = s->height; 199 ymax = 0; 200 } 201 x += G364_PAGE_SIZE; 202 dy = x / s->width; 203 x = x % s->width; 204 y += dy; 205 vram += G364_PAGE_SIZE; 206 data_display += dy * surface_stride(surface); 207 dd = data_display + x * w; 208 } 209 page += G364_PAGE_SIZE; 210 } 211 212 done: 213 if (xmax || ymax) { 214 dpy_gfx_update(s->con, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1); 215 } 216 g_free(snap); 217 } 218 219 static void g364fb_draw_blank(G364State *s) 220 { 221 DisplaySurface *surface = qemu_console_surface(s->con); 222 int i, w; 223 uint8_t *d; 224 225 if (s->blanked) { 226 /* Screen is already blank. No need to redraw it */ 227 return; 228 } 229 230 w = s->width * surface_bytes_per_pixel(surface); 231 d = surface_data(surface); 232 for (i = 0; i < s->height; i++) { 233 memset(d, 0, w); 234 d += surface_stride(surface); 235 } 236 237 dpy_gfx_update_full(s->con); 238 s->blanked = 1; 239 } 240 241 static void g364fb_update_display(void *opaque) 242 { 243 G364State *s = opaque; 244 DisplaySurface *surface = qemu_console_surface(s->con); 245 246 qemu_flush_coalesced_mmio_buffer(); 247 248 if (s->width == 0 || s->height == 0) 249 return; 250 251 if (s->width != surface_width(surface) || 252 s->height != surface_height(surface)) { 253 qemu_console_resize(s->con, s->width, s->height); 254 } 255 256 if (s->ctla & CTLA_FORCE_BLANK) { 257 g364fb_draw_blank(s); 258 } else if (s->depth == 8) { 259 g364fb_draw_graphic8(s); 260 } else { 261 error_report("g364: unknown guest depth %d", s->depth); 262 } 263 264 qemu_irq_raise(s->irq); 265 } 266 267 static inline void g364fb_invalidate_display(void *opaque) 268 { 269 G364State *s = opaque; 270 271 s->blanked = 0; 272 memory_region_set_dirty(&s->mem_vram, 0, s->vram_size); 273 } 274 275 static void g364fb_reset(G364State *s) 276 { 277 uint8_t *vram = memory_region_get_ram_ptr(&s->mem_vram); 278 279 qemu_irq_lower(s->irq); 280 281 memset(s->color_palette, 0, sizeof(s->color_palette)); 282 memset(s->cursor_palette, 0, sizeof(s->cursor_palette)); 283 memset(s->cursor, 0, sizeof(s->cursor)); 284 s->cursor_position = 0; 285 s->ctla = 0; 286 s->top_of_screen = 0; 287 s->width = s->height = 0; 288 memset(vram, 0, s->vram_size); 289 g364fb_invalidate_display(s); 290 } 291 292 /* called for accesses to io ports */ 293 static uint64_t g364fb_ctrl_read(void *opaque, 294 hwaddr addr, 295 unsigned int size) 296 { 297 G364State *s = opaque; 298 uint32_t val; 299 300 if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) { 301 /* cursor pattern */ 302 int idx = (addr - REG_CURS_PAT) >> 3; 303 val = s->cursor[idx]; 304 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) { 305 /* cursor palette */ 306 int idx = (addr - REG_CURS_PAL) >> 3; 307 val = ((uint32_t)s->cursor_palette[idx][0] << 16); 308 val |= ((uint32_t)s->cursor_palette[idx][1] << 8); 309 val |= ((uint32_t)s->cursor_palette[idx][2] << 0); 310 } else { 311 switch (addr) { 312 case REG_DISPLAY: 313 val = s->width / 4; 314 break; 315 case REG_VDISPLAY: 316 val = s->height * 2; 317 break; 318 case REG_CTLA: 319 val = s->ctla; 320 break; 321 default: 322 { 323 error_report("g364: invalid read at [" TARGET_FMT_plx "]", 324 addr); 325 val = 0; 326 break; 327 } 328 } 329 } 330 331 trace_g364fb_read(addr, val); 332 333 return val; 334 } 335 336 static void g364fb_update_depth(G364State *s) 337 { 338 static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 }; 339 s->depth = depths[(s->ctla & 0x00700000) >> 20]; 340 } 341 342 static void g364_invalidate_cursor_position(G364State *s) 343 { 344 DisplaySurface *surface = qemu_console_surface(s->con); 345 int ymin, ymax, start, end; 346 347 /* invalidate only near the cursor */ 348 ymin = s->cursor_position & 0xfff; 349 ymax = MIN(s->height, ymin + 64); 350 start = ymin * surface_stride(surface); 351 end = (ymax + 1) * surface_stride(surface); 352 353 memory_region_set_dirty(&s->mem_vram, start, end - start); 354 } 355 356 static void g364fb_ctrl_write(void *opaque, 357 hwaddr addr, 358 uint64_t val, 359 unsigned int size) 360 { 361 G364State *s = opaque; 362 363 trace_g364fb_write(addr, val); 364 365 if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) { 366 /* color palette */ 367 int idx = (addr - REG_CLR_PAL) >> 3; 368 s->color_palette[idx][0] = (val >> 16) & 0xff; 369 s->color_palette[idx][1] = (val >> 8) & 0xff; 370 s->color_palette[idx][2] = val & 0xff; 371 g364fb_invalidate_display(s); 372 } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) { 373 /* cursor pattern */ 374 int idx = (addr - REG_CURS_PAT) >> 3; 375 s->cursor[idx] = val; 376 g364fb_invalidate_display(s); 377 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) { 378 /* cursor palette */ 379 int idx = (addr - REG_CURS_PAL) >> 3; 380 s->cursor_palette[idx][0] = (val >> 16) & 0xff; 381 s->cursor_palette[idx][1] = (val >> 8) & 0xff; 382 s->cursor_palette[idx][2] = val & 0xff; 383 g364fb_invalidate_display(s); 384 } else { 385 switch (addr) { 386 case REG_BOOT: /* Boot timing */ 387 case 0x00108: /* Line timing: half sync */ 388 case 0x00110: /* Line timing: back porch */ 389 case 0x00120: /* Line timing: short display */ 390 case 0x00128: /* Frame timing: broad pulse */ 391 case 0x00130: /* Frame timing: v sync */ 392 case 0x00138: /* Frame timing: v preequalise */ 393 case 0x00140: /* Frame timing: v postequalise */ 394 case 0x00148: /* Frame timing: v blank */ 395 case 0x00158: /* Line timing: line time */ 396 case 0x00160: /* Frame store: line start */ 397 case 0x00168: /* vram cycle: mem init */ 398 case 0x00170: /* vram cycle: transfer delay */ 399 case 0x00200: /* vram cycle: mask register */ 400 /* ignore */ 401 break; 402 case REG_TOP: 403 s->top_of_screen = val; 404 g364fb_invalidate_display(s); 405 break; 406 case REG_DISPLAY: 407 s->width = val * 4; 408 break; 409 case REG_VDISPLAY: 410 s->height = val / 2; 411 break; 412 case REG_CTLA: 413 s->ctla = val; 414 g364fb_update_depth(s); 415 g364fb_invalidate_display(s); 416 break; 417 case REG_CURS_POS: 418 g364_invalidate_cursor_position(s); 419 s->cursor_position = val; 420 g364_invalidate_cursor_position(s); 421 break; 422 case REG_RESET: 423 g364fb_reset(s); 424 break; 425 default: 426 error_report("g364: invalid write of 0x%" PRIx64 427 " at [" TARGET_FMT_plx "]", val, addr); 428 break; 429 } 430 } 431 qemu_irq_lower(s->irq); 432 } 433 434 static const MemoryRegionOps g364fb_ctrl_ops = { 435 .read = g364fb_ctrl_read, 436 .write = g364fb_ctrl_write, 437 .endianness = DEVICE_LITTLE_ENDIAN, 438 .impl.min_access_size = 4, 439 .impl.max_access_size = 4, 440 }; 441 442 static int g364fb_post_load(void *opaque, int version_id) 443 { 444 G364State *s = opaque; 445 446 /* force refresh */ 447 g364fb_update_depth(s); 448 g364fb_invalidate_display(s); 449 450 return 0; 451 } 452 453 static const VMStateDescription vmstate_g364fb = { 454 .name = "g364fb", 455 .version_id = 2, 456 .minimum_version_id = 2, 457 .post_load = g364fb_post_load, 458 .fields = (VMStateField[]) { 459 VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3), 460 VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9), 461 VMSTATE_UINT16_ARRAY(cursor, G364State, 512), 462 VMSTATE_UINT32(cursor_position, G364State), 463 VMSTATE_UINT32(ctla, G364State), 464 VMSTATE_UINT32(top_of_screen, G364State), 465 VMSTATE_UINT32(width, G364State), 466 VMSTATE_UINT32(height, G364State), 467 VMSTATE_END_OF_LIST() 468 } 469 }; 470 471 static const GraphicHwOps g364fb_ops = { 472 .invalidate = g364fb_invalidate_display, 473 .gfx_update = g364fb_update_display, 474 }; 475 476 static void g364fb_init(DeviceState *dev, G364State *s) 477 { 478 s->con = graphic_console_init(dev, 0, &g364fb_ops, s); 479 480 memory_region_init_io(&s->mem_ctrl, OBJECT(dev), &g364fb_ctrl_ops, s, 481 "ctrl", 0x180000); 482 memory_region_init_ram(&s->mem_vram, NULL, "g364fb.vram", s->vram_size, 483 &error_fatal); 484 memory_region_set_log(&s->mem_vram, true, DIRTY_MEMORY_VGA); 485 } 486 487 #define TYPE_G364 "sysbus-g364" 488 OBJECT_DECLARE_SIMPLE_TYPE(G364SysBusState, G364) 489 490 struct G364SysBusState { 491 SysBusDevice parent_obj; 492 493 G364State g364; 494 }; 495 496 static void g364fb_sysbus_realize(DeviceState *dev, Error **errp) 497 { 498 G364SysBusState *sbs = G364(dev); 499 G364State *s = &sbs->g364; 500 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 501 502 g364fb_init(dev, s); 503 sysbus_init_irq(sbd, &s->irq); 504 sysbus_init_mmio(sbd, &s->mem_ctrl); 505 sysbus_init_mmio(sbd, &s->mem_vram); 506 } 507 508 static void g364fb_sysbus_reset(DeviceState *d) 509 { 510 G364SysBusState *s = G364(d); 511 512 g364fb_reset(&s->g364); 513 } 514 515 static Property g364fb_sysbus_properties[] = { 516 DEFINE_PROP_UINT32("vram_size", G364SysBusState, g364.vram_size, 8 * MiB), 517 DEFINE_PROP_END_OF_LIST(), 518 }; 519 520 static const VMStateDescription vmstate_g364fb_sysbus = { 521 .name = "g364fb-sysbus", 522 .version_id = 2, 523 .minimum_version_id = 2, 524 .fields = (VMStateField[]) { 525 VMSTATE_STRUCT(g364, G364SysBusState, 2, vmstate_g364fb, G364State), 526 VMSTATE_END_OF_LIST() 527 } 528 }; 529 530 static void g364fb_sysbus_class_init(ObjectClass *klass, void *data) 531 { 532 DeviceClass *dc = DEVICE_CLASS(klass); 533 534 dc->realize = g364fb_sysbus_realize; 535 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 536 dc->desc = "G364 framebuffer"; 537 dc->reset = g364fb_sysbus_reset; 538 dc->vmsd = &vmstate_g364fb_sysbus; 539 device_class_set_props(dc, g364fb_sysbus_properties); 540 } 541 542 static const TypeInfo g364fb_sysbus_info = { 543 .name = TYPE_G364, 544 .parent = TYPE_SYS_BUS_DEVICE, 545 .instance_size = sizeof(G364SysBusState), 546 .class_init = g364fb_sysbus_class_init, 547 }; 548 549 static void g364fb_register_types(void) 550 { 551 type_register_static(&g364fb_sysbus_info); 552 } 553 554 type_init(g364fb_register_types)