1 /* 2 * QEMU Motorola 680x0 Macintosh Video Card Emulation 3 * Copyright (c) 2012-2018 Laurent Vivier 4 * 5 * some parts from QEMU G364 framebuffer Emulator. 6 * Copyright (c) 2007-2011 Herve Poussineau 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or later. 9 * See the COPYING file in the top-level directory. 10 * 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qemu/units.h" 15 #include "hw/sysbus.h" 16 #include "ui/console.h" 17 #include "ui/pixel_ops.h" 18 #include "hw/nubus/nubus.h" 19 #include "hw/display/macfb.h" 20 #include "qapi/error.h" 21 #include "hw/qdev-properties.h" 22 #include "migration/vmstate.h" 23 24 #define VIDEO_BASE 0x00001000 25 #define DAFB_BASE 0x00800000 26 27 #define MACFB_PAGE_SIZE 4096 28 #define MACFB_VRAM_SIZE (4 * MiB) 29 30 #define DAFB_RESET 0x200 31 #define DAFB_LUT 0x213 32 33 34 typedef void macfb_draw_line_func(MacfbState *s, uint8_t *d, uint32_t addr, 35 int width); 36 37 static inline uint8_t macfb_read_byte(MacfbState *s, uint32_t addr) 38 { 39 return s->vram[addr & s->vram_bit_mask]; 40 } 41 42 /* 1-bit color */ 43 static void macfb_draw_line1(MacfbState *s, uint8_t *d, uint32_t addr, 44 int width) 45 { 46 uint8_t r, g, b; 47 int x; 48 49 for (x = 0; x < width; x++) { 50 int bit = x & 7; 51 int idx = (macfb_read_byte(s, addr) >> (7 - bit)) & 1; 52 r = g = b = ((1 - idx) << 7); 53 addr += (bit == 7); 54 55 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 56 d += 4; 57 } 58 } 59 60 /* 2-bit color */ 61 static void macfb_draw_line2(MacfbState *s, uint8_t *d, uint32_t addr, 62 int width) 63 { 64 uint8_t r, g, b; 65 int x; 66 67 for (x = 0; x < width; x++) { 68 int bit = (x & 3); 69 int idx = (macfb_read_byte(s, addr) >> ((3 - bit) << 1)) & 3; 70 r = s->color_palette[idx * 3]; 71 g = s->color_palette[idx * 3 + 1]; 72 b = s->color_palette[idx * 3 + 2]; 73 addr += (bit == 3); 74 75 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 76 d += 4; 77 } 78 } 79 80 /* 4-bit color */ 81 static void macfb_draw_line4(MacfbState *s, uint8_t *d, uint32_t addr, 82 int width) 83 { 84 uint8_t r, g, b; 85 int x; 86 87 for (x = 0; x < width; x++) { 88 int bit = x & 1; 89 int idx = (macfb_read_byte(s, addr) >> ((1 - bit) << 2)) & 15; 90 r = s->color_palette[idx * 3]; 91 g = s->color_palette[idx * 3 + 1]; 92 b = s->color_palette[idx * 3 + 2]; 93 addr += (bit == 1); 94 95 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 96 d += 4; 97 } 98 } 99 100 /* 8-bit color */ 101 static void macfb_draw_line8(MacfbState *s, uint8_t *d, uint32_t addr, 102 int width) 103 { 104 uint8_t r, g, b; 105 int x; 106 107 for (x = 0; x < width; x++) { 108 r = s->color_palette[macfb_read_byte(s, addr) * 3]; 109 g = s->color_palette[macfb_read_byte(s, addr) * 3 + 1]; 110 b = s->color_palette[macfb_read_byte(s, addr) * 3 + 2]; 111 addr++; 112 113 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 114 d += 4; 115 } 116 } 117 118 /* 16-bit color */ 119 static void macfb_draw_line16(MacfbState *s, uint8_t *d, uint32_t addr, 120 int width) 121 { 122 uint8_t r, g, b; 123 int x; 124 125 for (x = 0; x < width; x++) { 126 uint16_t pixel; 127 pixel = (macfb_read_byte(s, addr) << 8) | macfb_read_byte(s, addr + 1); 128 r = ((pixel >> 10) & 0x1f) << 3; 129 g = ((pixel >> 5) & 0x1f) << 3; 130 b = (pixel & 0x1f) << 3; 131 addr += 2; 132 133 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 134 d += 4; 135 } 136 } 137 138 /* 24-bit color */ 139 static void macfb_draw_line24(MacfbState *s, uint8_t *d, uint32_t addr, 140 int width) 141 { 142 uint8_t r, g, b; 143 int x; 144 145 for (x = 0; x < width; x++) { 146 r = macfb_read_byte(s, addr); 147 g = macfb_read_byte(s, addr + 1); 148 b = macfb_read_byte(s, addr + 2); 149 addr += 3; 150 151 *(uint32_t *)d = rgb_to_pixel32(r, g, b); 152 d += 4; 153 } 154 } 155 156 157 enum { 158 MACFB_DRAW_LINE1, 159 MACFB_DRAW_LINE2, 160 MACFB_DRAW_LINE4, 161 MACFB_DRAW_LINE8, 162 MACFB_DRAW_LINE16, 163 MACFB_DRAW_LINE24, 164 MACFB_DRAW_LINE_NB, 165 }; 166 167 static macfb_draw_line_func * const 168 macfb_draw_line_table[MACFB_DRAW_LINE_NB] = { 169 macfb_draw_line1, 170 macfb_draw_line2, 171 macfb_draw_line4, 172 macfb_draw_line8, 173 macfb_draw_line16, 174 macfb_draw_line24, 175 }; 176 177 static int macfb_check_dirty(MacfbState *s, DirtyBitmapSnapshot *snap, 178 ram_addr_t addr, int len) 179 { 180 return memory_region_snapshot_get_dirty(&s->mem_vram, snap, addr, len); 181 } 182 183 static void macfb_draw_graphic(MacfbState *s) 184 { 185 DisplaySurface *surface = qemu_console_surface(s->con); 186 DirtyBitmapSnapshot *snap = NULL; 187 ram_addr_t page; 188 uint32_t v = 0; 189 int y, ymin; 190 int macfb_stride = (s->depth * s->width + 7) / 8; 191 macfb_draw_line_func *macfb_draw_line; 192 193 switch (s->depth) { 194 case 1: 195 v = MACFB_DRAW_LINE1; 196 break; 197 case 2: 198 v = MACFB_DRAW_LINE2; 199 break; 200 case 4: 201 v = MACFB_DRAW_LINE4; 202 break; 203 case 8: 204 v = MACFB_DRAW_LINE8; 205 break; 206 case 16: 207 v = MACFB_DRAW_LINE16; 208 break; 209 case 24: 210 v = MACFB_DRAW_LINE24; 211 break; 212 } 213 214 macfb_draw_line = macfb_draw_line_table[v]; 215 assert(macfb_draw_line != NULL); 216 217 snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0x0, 218 memory_region_size(&s->mem_vram), 219 DIRTY_MEMORY_VGA); 220 221 ymin = -1; 222 page = 0; 223 for (y = 0; y < s->height; y++, page += macfb_stride) { 224 if (macfb_check_dirty(s, snap, page, macfb_stride)) { 225 uint8_t *data_display; 226 227 data_display = surface_data(surface) + y * surface_stride(surface); 228 macfb_draw_line(s, data_display, page, s->width); 229 230 if (ymin < 0) { 231 ymin = y; 232 } 233 } else { 234 if (ymin >= 0) { 235 dpy_gfx_update(s->con, 0, ymin, s->width, y - ymin); 236 ymin = -1; 237 } 238 } 239 } 240 241 if (ymin >= 0) { 242 dpy_gfx_update(s->con, 0, ymin, s->width, y - ymin); 243 } 244 245 g_free(snap); 246 } 247 248 static void macfb_invalidate_display(void *opaque) 249 { 250 MacfbState *s = opaque; 251 252 memory_region_set_dirty(&s->mem_vram, 0, MACFB_VRAM_SIZE); 253 } 254 255 static void macfb_update_display(void *opaque) 256 { 257 MacfbState *s = opaque; 258 DisplaySurface *surface = qemu_console_surface(s->con); 259 260 qemu_flush_coalesced_mmio_buffer(); 261 262 if (s->width == 0 || s->height == 0) { 263 return; 264 } 265 266 if (s->width != surface_width(surface) || 267 s->height != surface_height(surface)) { 268 qemu_console_resize(s->con, s->width, s->height); 269 } 270 271 macfb_draw_graphic(s); 272 } 273 274 static void macfb_reset(MacfbState *s) 275 { 276 int i; 277 278 s->palette_current = 0; 279 for (i = 0; i < 256; i++) { 280 s->color_palette[i * 3] = 255 - i; 281 s->color_palette[i * 3 + 1] = 255 - i; 282 s->color_palette[i * 3 + 2] = 255 - i; 283 } 284 memset(s->vram, 0, MACFB_VRAM_SIZE); 285 macfb_invalidate_display(s); 286 } 287 288 static uint64_t macfb_ctrl_read(void *opaque, 289 hwaddr addr, 290 unsigned int size) 291 { 292 return 0; 293 } 294 295 static void macfb_ctrl_write(void *opaque, 296 hwaddr addr, 297 uint64_t val, 298 unsigned int size) 299 { 300 MacfbState *s = opaque; 301 switch (addr) { 302 case DAFB_RESET: 303 s->palette_current = 0; 304 break; 305 case DAFB_LUT: 306 s->color_palette[s->palette_current++] = val; 307 if (s->palette_current % 3) { 308 macfb_invalidate_display(s); 309 } 310 break; 311 } 312 } 313 314 static const MemoryRegionOps macfb_ctrl_ops = { 315 .read = macfb_ctrl_read, 316 .write = macfb_ctrl_write, 317 .endianness = DEVICE_BIG_ENDIAN, 318 .impl.min_access_size = 1, 319 .impl.max_access_size = 4, 320 }; 321 322 static int macfb_post_load(void *opaque, int version_id) 323 { 324 macfb_invalidate_display(opaque); 325 return 0; 326 } 327 328 static const VMStateDescription vmstate_macfb = { 329 .name = "macfb", 330 .version_id = 1, 331 .minimum_version_id = 1, 332 .minimum_version_id_old = 1, 333 .post_load = macfb_post_load, 334 .fields = (VMStateField[]) { 335 VMSTATE_UINT8_ARRAY(color_palette, MacfbState, 256 * 3), 336 VMSTATE_UINT32(palette_current, MacfbState), 337 VMSTATE_END_OF_LIST() 338 } 339 }; 340 341 static const GraphicHwOps macfb_ops = { 342 .invalidate = macfb_invalidate_display, 343 .gfx_update = macfb_update_display, 344 }; 345 346 static void macfb_common_realize(DeviceState *dev, MacfbState *s, Error **errp) 347 { 348 DisplaySurface *surface; 349 350 if (s->depth != 1 && s->depth != 2 && s->depth != 4 && s->depth != 8 && 351 s->depth != 16 && s->depth != 24) { 352 error_setg(errp, "unknown guest depth %d", s->depth); 353 return; 354 } 355 356 s->con = graphic_console_init(dev, 0, &macfb_ops, s); 357 surface = qemu_console_surface(s->con); 358 359 if (surface_bits_per_pixel(surface) != 32) { 360 error_setg(errp, "unknown host depth %d", 361 surface_bits_per_pixel(surface)); 362 return; 363 } 364 365 memory_region_init_io(&s->mem_ctrl, OBJECT(dev), &macfb_ctrl_ops, s, 366 "macfb-ctrl", 0x1000); 367 368 memory_region_init_ram_nomigrate(&s->mem_vram, OBJECT(s), "macfb-vram", 369 MACFB_VRAM_SIZE, errp); 370 s->vram = memory_region_get_ram_ptr(&s->mem_vram); 371 s->vram_bit_mask = MACFB_VRAM_SIZE - 1; 372 vmstate_register_ram(&s->mem_vram, dev); 373 memory_region_set_coalescing(&s->mem_vram); 374 } 375 376 static void macfb_sysbus_realize(DeviceState *dev, Error **errp) 377 { 378 MacfbSysBusState *s = MACFB(dev); 379 MacfbState *ms = &s->macfb; 380 381 macfb_common_realize(dev, ms, errp); 382 sysbus_init_mmio(SYS_BUS_DEVICE(s), &ms->mem_ctrl); 383 sysbus_init_mmio(SYS_BUS_DEVICE(s), &ms->mem_vram); 384 } 385 386 const uint8_t macfb_rom[] = { 387 255, 0, 0, 0, 388 }; 389 390 static void macfb_nubus_realize(DeviceState *dev, Error **errp) 391 { 392 NubusDevice *nd = NUBUS_DEVICE(dev); 393 MacfbNubusState *s = NUBUS_MACFB(dev); 394 MacfbNubusDeviceClass *ndc = MACFB_NUBUS_GET_CLASS(dev); 395 MacfbState *ms = &s->macfb; 396 397 ndc->parent_realize(dev, errp); 398 399 macfb_common_realize(dev, ms, errp); 400 memory_region_add_subregion(&nd->slot_mem, DAFB_BASE, &ms->mem_ctrl); 401 memory_region_add_subregion(&nd->slot_mem, VIDEO_BASE, &ms->mem_vram); 402 403 nubus_register_rom(nd, macfb_rom, sizeof(macfb_rom), 1, 9, 0xf); 404 } 405 406 static void macfb_sysbus_reset(DeviceState *d) 407 { 408 MacfbSysBusState *s = MACFB(d); 409 macfb_reset(&s->macfb); 410 } 411 412 static void macfb_nubus_reset(DeviceState *d) 413 { 414 MacfbNubusState *s = NUBUS_MACFB(d); 415 macfb_reset(&s->macfb); 416 } 417 418 static Property macfb_sysbus_properties[] = { 419 DEFINE_PROP_UINT32("width", MacfbSysBusState, macfb.width, 640), 420 DEFINE_PROP_UINT32("height", MacfbSysBusState, macfb.height, 480), 421 DEFINE_PROP_UINT8("depth", MacfbSysBusState, macfb.depth, 8), 422 DEFINE_PROP_END_OF_LIST(), 423 }; 424 425 static Property macfb_nubus_properties[] = { 426 DEFINE_PROP_UINT32("width", MacfbNubusState, macfb.width, 640), 427 DEFINE_PROP_UINT32("height", MacfbNubusState, macfb.height, 480), 428 DEFINE_PROP_UINT8("depth", MacfbNubusState, macfb.depth, 8), 429 DEFINE_PROP_END_OF_LIST(), 430 }; 431 432 static void macfb_sysbus_class_init(ObjectClass *klass, void *data) 433 { 434 DeviceClass *dc = DEVICE_CLASS(klass); 435 436 dc->realize = macfb_sysbus_realize; 437 dc->desc = "SysBus Macintosh framebuffer"; 438 dc->reset = macfb_sysbus_reset; 439 dc->vmsd = &vmstate_macfb; 440 device_class_set_props(dc, macfb_sysbus_properties); 441 } 442 443 static void macfb_nubus_class_init(ObjectClass *klass, void *data) 444 { 445 DeviceClass *dc = DEVICE_CLASS(klass); 446 MacfbNubusDeviceClass *ndc = MACFB_NUBUS_DEVICE_CLASS(klass); 447 448 device_class_set_parent_realize(dc, macfb_nubus_realize, 449 &ndc->parent_realize); 450 dc->desc = "Nubus Macintosh framebuffer"; 451 dc->reset = macfb_nubus_reset; 452 dc->vmsd = &vmstate_macfb; 453 device_class_set_props(dc, macfb_nubus_properties); 454 } 455 456 static TypeInfo macfb_sysbus_info = { 457 .name = TYPE_MACFB, 458 .parent = TYPE_SYS_BUS_DEVICE, 459 .instance_size = sizeof(MacfbSysBusState), 460 .class_init = macfb_sysbus_class_init, 461 }; 462 463 static TypeInfo macfb_nubus_info = { 464 .name = TYPE_NUBUS_MACFB, 465 .parent = TYPE_NUBUS_DEVICE, 466 .instance_size = sizeof(MacfbNubusState), 467 .class_init = macfb_nubus_class_init, 468 .class_size = sizeof(MacfbNubusDeviceClass), 469 }; 470 471 static void macfb_register_types(void) 472 { 473 type_register_static(&macfb_sysbus_info); 474 type_register_static(&macfb_nubus_info); 475 } 476 477 type_init(macfb_register_types) 478