2 * QEMU G364 framebuffer Emulator.
4 * Copyright (c) 2007-2011 Herve Poussineau
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.
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.
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/>.
20 #include "qemu/osdep.h"
22 #include "qemu/error-report.h"
23 #include "ui/console.h"
24 #include "ui/pixel_ops.h"
26 #include "hw/sysbus.h"
28 typedef struct G364State {
33 MemoryRegion mem_vram;
34 MemoryRegion mem_ctrl;
36 uint8_t color_palette[256][3];
37 uint8_t cursor_palette[3][3];
39 uint32_t cursor_position;
41 uint32_t top_of_screen;
42 uint32_t width, height; /* in pixels */
43 /* display refresh support */
49 #define REG_BOOT 0x000000
50 #define REG_DISPLAY 0x000118
51 #define REG_VDISPLAY 0x000150
52 #define REG_CTLA 0x000300
53 #define REG_TOP 0x000400
54 #define REG_CURS_PAL 0x000508
55 #define REG_CURS_POS 0x000638
56 #define REG_CLR_PAL 0x000800
57 #define REG_CURS_PAT 0x001000
58 #define REG_RESET 0x100000
60 #define CTLA_FORCE_BLANK 0x00000400
61 #define CTLA_NO_CURSOR 0x00800000
63 #define G364_PAGE_SIZE 4096
65 static inline int check_dirty(G364State *s, DirtyBitmapSnapshot *snap, ram_addr_t page)
67 return memory_region_snapshot_get_dirty(&s->mem_vram, snap, page, G364_PAGE_SIZE);
70 static void g364fb_draw_graphic8(G364State *s)
72 DisplaySurface *surface = qemu_console_surface(s->con);
73 DirtyBitmapSnapshot *snap;
76 uint8_t *data_display, *dd;
82 unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
84 switch (surface_bits_per_pixel(surface)) {
86 rgb_to_pixel = rgb_to_pixel8;
90 rgb_to_pixel = rgb_to_pixel15;
94 rgb_to_pixel = rgb_to_pixel16;
98 rgb_to_pixel = rgb_to_pixel32;
102 hw_error("g364: unknown host depth %d",
103 surface_bits_per_pixel(surface));
115 if (!(s->ctla & CTLA_NO_CURSOR)) {
116 xcursor = s->cursor_position >> 12;
117 ycursor = s->cursor_position & 0xfff;
119 xcursor = ycursor = -65;
122 vram = s->vram + s->top_of_screen;
123 /* XXX: out of range in vram? */
124 data_display = dd = surface_data(surface);
125 snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0, s->vram_size,
127 while (y < s->height) {
128 if (check_dirty(s, snap, page)) {
133 for (i = 0; i < G364_PAGE_SIZE; i++) {
136 if (unlikely((y >= ycursor && y < ycursor + 64) &&
137 (x >= xcursor && x < xcursor + 64))) {
139 int xdiff = x - xcursor;
140 uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
141 int op = (curs >> ((xdiff & 7) * 2)) & 3;
142 if (likely(op == 0)) {
145 color = (*rgb_to_pixel)(
146 s->color_palette[index][0],
147 s->color_palette[index][1],
148 s->color_palette[index][2]);
150 /* get cursor color */
152 color = (*rgb_to_pixel)(
153 s->cursor_palette[index][0],
154 s->cursor_palette[index][1],
155 s->cursor_palette[index][2]);
160 color = (*rgb_to_pixel)(
161 s->color_palette[index][0],
162 s->color_palette[index][1],
163 s->color_palette[index][2]);
165 memcpy(dd, &color, w);
172 if (y == s->height) {
173 ymax = s->height - 1;
176 data_display = dd = data_display + surface_stride(surface);
188 dpy_gfx_update(s->con, xmin, ymin,
189 xmax - xmin + 1, ymax - ymin + 1);
199 vram += G364_PAGE_SIZE;
200 data_display += dy * surface_stride(surface);
201 dd = data_display + x * w;
203 page += G364_PAGE_SIZE;
208 dpy_gfx_update(s->con, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
212 static void g364fb_draw_blank(G364State *s)
214 DisplaySurface *surface = qemu_console_surface(s->con);
219 /* Screen is already blank. No need to redraw it */
223 w = s->width * surface_bytes_per_pixel(surface);
224 d = surface_data(surface);
225 for (i = 0; i < s->height; i++) {
227 d += surface_stride(surface);
230 dpy_gfx_update(s->con, 0, 0, s->width, s->height);
234 static void g364fb_update_display(void *opaque)
236 G364State *s = opaque;
237 DisplaySurface *surface = qemu_console_surface(s->con);
239 qemu_flush_coalesced_mmio_buffer();
241 if (s->width == 0 || s->height == 0)
244 if (s->width != surface_width(surface) ||
245 s->height != surface_height(surface)) {
246 qemu_console_resize(s->con, s->width, s->height);
249 if (s->ctla & CTLA_FORCE_BLANK) {
250 g364fb_draw_blank(s);
251 } else if (s->depth == 8) {
252 g364fb_draw_graphic8(s);
254 error_report("g364: unknown guest depth %d", s->depth);
257 qemu_irq_raise(s->irq);
260 static inline void g364fb_invalidate_display(void *opaque)
262 G364State *s = opaque;
265 memory_region_set_dirty(&s->mem_vram, 0, s->vram_size);
268 static void g364fb_reset(G364State *s)
270 qemu_irq_lower(s->irq);
272 memset(s->color_palette, 0, sizeof(s->color_palette));
273 memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
274 memset(s->cursor, 0, sizeof(s->cursor));
275 s->cursor_position = 0;
277 s->top_of_screen = 0;
278 s->width = s->height = 0;
279 memset(s->vram, 0, s->vram_size);
280 g364fb_invalidate_display(s);
283 /* called for accesses to io ports */
284 static uint64_t g364fb_ctrl_read(void *opaque,
288 G364State *s = opaque;
291 if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
293 int idx = (addr - REG_CURS_PAT) >> 3;
294 val = s->cursor[idx];
295 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
297 int idx = (addr - REG_CURS_PAL) >> 3;
298 val = ((uint32_t)s->cursor_palette[idx][0] << 16);
299 val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
300 val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
314 error_report("g364: invalid read at [" TARGET_FMT_plx "]",
322 trace_g364fb_read(addr, val);
327 static void g364fb_update_depth(G364State *s)
329 static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
330 s->depth = depths[(s->ctla & 0x00700000) >> 20];
333 static void g364_invalidate_cursor_position(G364State *s)
335 DisplaySurface *surface = qemu_console_surface(s->con);
336 int ymin, ymax, start, end;
338 /* invalidate only near the cursor */
339 ymin = s->cursor_position & 0xfff;
340 ymax = MIN(s->height, ymin + 64);
341 start = ymin * surface_stride(surface);
342 end = (ymax + 1) * surface_stride(surface);
344 memory_region_set_dirty(&s->mem_vram, start, end - start);
347 static void g364fb_ctrl_write(void *opaque,
352 G364State *s = opaque;
354 trace_g364fb_write(addr, val);
356 if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
358 int idx = (addr - REG_CLR_PAL) >> 3;
359 s->color_palette[idx][0] = (val >> 16) & 0xff;
360 s->color_palette[idx][1] = (val >> 8) & 0xff;
361 s->color_palette[idx][2] = val & 0xff;
362 g364fb_invalidate_display(s);
363 } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
365 int idx = (addr - REG_CURS_PAT) >> 3;
366 s->cursor[idx] = val;
367 g364fb_invalidate_display(s);
368 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
370 int idx = (addr - REG_CURS_PAL) >> 3;
371 s->cursor_palette[idx][0] = (val >> 16) & 0xff;
372 s->cursor_palette[idx][1] = (val >> 8) & 0xff;
373 s->cursor_palette[idx][2] = val & 0xff;
374 g364fb_invalidate_display(s);
377 case REG_BOOT: /* Boot timing */
378 case 0x00108: /* Line timing: half sync */
379 case 0x00110: /* Line timing: back porch */
380 case 0x00120: /* Line timing: short display */
381 case 0x00128: /* Frame timing: broad pulse */
382 case 0x00130: /* Frame timing: v sync */
383 case 0x00138: /* Frame timing: v preequalise */
384 case 0x00140: /* Frame timing: v postequalise */
385 case 0x00148: /* Frame timing: v blank */
386 case 0x00158: /* Line timing: line time */
387 case 0x00160: /* Frame store: line start */
388 case 0x00168: /* vram cycle: mem init */
389 case 0x00170: /* vram cycle: transfer delay */
390 case 0x00200: /* vram cycle: mask register */
394 s->top_of_screen = val;
395 g364fb_invalidate_display(s);
405 g364fb_update_depth(s);
406 g364fb_invalidate_display(s);
409 g364_invalidate_cursor_position(s);
410 s->cursor_position = val;
411 g364_invalidate_cursor_position(s);
417 error_report("g364: invalid write of 0x%" PRIx64
418 " at [" TARGET_FMT_plx "]", val, addr);
422 qemu_irq_lower(s->irq);
425 static const MemoryRegionOps g364fb_ctrl_ops = {
426 .read = g364fb_ctrl_read,
427 .write = g364fb_ctrl_write,
428 .endianness = DEVICE_LITTLE_ENDIAN,
429 .impl.min_access_size = 4,
430 .impl.max_access_size = 4,
433 static int g364fb_post_load(void *opaque, int version_id)
435 G364State *s = opaque;
438 g364fb_update_depth(s);
439 g364fb_invalidate_display(s);
444 static const VMStateDescription vmstate_g364fb = {
447 .minimum_version_id = 1,
448 .post_load = g364fb_post_load,
449 .fields = (VMStateField[]) {
450 VMSTATE_VBUFFER_UINT32(vram, G364State, 1, NULL, vram_size),
451 VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3),
452 VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9),
453 VMSTATE_UINT16_ARRAY(cursor, G364State, 512),
454 VMSTATE_UINT32(cursor_position, G364State),
455 VMSTATE_UINT32(ctla, G364State),
456 VMSTATE_UINT32(top_of_screen, G364State),
457 VMSTATE_UINT32(width, G364State),
458 VMSTATE_UINT32(height, G364State),
459 VMSTATE_END_OF_LIST()
463 static const GraphicHwOps g364fb_ops = {
464 .invalidate = g364fb_invalidate_display,
465 .gfx_update = g364fb_update_display,
468 static void g364fb_init(DeviceState *dev, G364State *s)
470 s->vram = g_malloc0(s->vram_size);
472 s->con = graphic_console_init(dev, 0, &g364fb_ops, s);
474 memory_region_init_io(&s->mem_ctrl, NULL, &g364fb_ctrl_ops, s, "ctrl", 0x180000);
475 memory_region_init_ram_ptr(&s->mem_vram, NULL, "vram",
476 s->vram_size, s->vram);
477 vmstate_register_ram(&s->mem_vram, dev);
478 memory_region_set_log(&s->mem_vram, true, DIRTY_MEMORY_VGA);
481 #define TYPE_G364 "sysbus-g364"
482 #define G364(obj) OBJECT_CHECK(G364SysBusState, (obj), TYPE_G364)
485 SysBusDevice parent_obj;
490 static int g364fb_sysbus_init(SysBusDevice *sbd)
492 DeviceState *dev = DEVICE(sbd);
493 G364SysBusState *sbs = G364(dev);
494 G364State *s = &sbs->g364;
497 sysbus_init_irq(sbd, &s->irq);
498 sysbus_init_mmio(sbd, &s->mem_ctrl);
499 sysbus_init_mmio(sbd, &s->mem_vram);
504 static void g364fb_sysbus_reset(DeviceState *d)
506 G364SysBusState *s = G364(d);
508 g364fb_reset(&s->g364);
511 static Property g364fb_sysbus_properties[] = {
512 DEFINE_PROP_UINT32("vram_size", G364SysBusState, g364.vram_size,
514 DEFINE_PROP_END_OF_LIST(),
517 static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
519 DeviceClass *dc = DEVICE_CLASS(klass);
520 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
522 k->init = g364fb_sysbus_init;
523 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
524 dc->desc = "G364 framebuffer";
525 dc->reset = g364fb_sysbus_reset;
526 dc->vmsd = &vmstate_g364fb;
527 dc->props = g364fb_sysbus_properties;
530 static const TypeInfo g364fb_sysbus_info = {
532 .parent = TYPE_SYS_BUS_DEVICE,
533 .instance_size = sizeof(G364SysBusState),
534 .class_init = g364fb_sysbus_class_init,
537 static void g364fb_register_types(void)
539 type_register_static(&g364fb_sysbus_info);
542 type_init(g364fb_register_types)