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"
21 #include "qemu/units.h"
23 #include "qemu/error-report.h"
24 #include "ui/console.h"
25 #include "ui/pixel_ops.h"
27 #include "hw/sysbus.h"
29 typedef struct G364State {
34 MemoryRegion mem_vram;
35 MemoryRegion mem_ctrl;
37 uint8_t color_palette[256][3];
38 uint8_t cursor_palette[3][3];
40 uint32_t cursor_position;
42 uint32_t top_of_screen;
43 uint32_t width, height; /* in pixels */
44 /* display refresh support */
50 #define REG_BOOT 0x000000
51 #define REG_DISPLAY 0x000118
52 #define REG_VDISPLAY 0x000150
53 #define REG_CTLA 0x000300
54 #define REG_TOP 0x000400
55 #define REG_CURS_PAL 0x000508
56 #define REG_CURS_POS 0x000638
57 #define REG_CLR_PAL 0x000800
58 #define REG_CURS_PAT 0x001000
59 #define REG_RESET 0x100000
61 #define CTLA_FORCE_BLANK 0x00000400
62 #define CTLA_NO_CURSOR 0x00800000
64 #define G364_PAGE_SIZE 4096
66 static inline int check_dirty(G364State *s, DirtyBitmapSnapshot *snap, ram_addr_t page)
68 return memory_region_snapshot_get_dirty(&s->mem_vram, snap, page, G364_PAGE_SIZE);
71 static void g364fb_draw_graphic8(G364State *s)
73 DisplaySurface *surface = qemu_console_surface(s->con);
74 DirtyBitmapSnapshot *snap;
77 uint8_t *data_display, *dd;
83 unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
85 switch (surface_bits_per_pixel(surface)) {
87 rgb_to_pixel = rgb_to_pixel8;
91 rgb_to_pixel = rgb_to_pixel15;
95 rgb_to_pixel = rgb_to_pixel16;
99 rgb_to_pixel = rgb_to_pixel32;
103 hw_error("g364: unknown host depth %d",
104 surface_bits_per_pixel(surface));
116 if (!(s->ctla & CTLA_NO_CURSOR)) {
117 xcursor = s->cursor_position >> 12;
118 ycursor = s->cursor_position & 0xfff;
120 xcursor = ycursor = -65;
123 vram = s->vram + s->top_of_screen;
124 /* XXX: out of range in vram? */
125 data_display = dd = surface_data(surface);
126 snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0, s->vram_size,
128 while (y < s->height) {
129 if (check_dirty(s, snap, page)) {
134 for (i = 0; i < G364_PAGE_SIZE; i++) {
137 if (unlikely((y >= ycursor && y < ycursor + 64) &&
138 (x >= xcursor && x < xcursor + 64))) {
140 int xdiff = x - xcursor;
141 uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
142 int op = (curs >> ((xdiff & 7) * 2)) & 3;
143 if (likely(op == 0)) {
146 color = (*rgb_to_pixel)(
147 s->color_palette[index][0],
148 s->color_palette[index][1],
149 s->color_palette[index][2]);
151 /* get cursor color */
153 color = (*rgb_to_pixel)(
154 s->cursor_palette[index][0],
155 s->cursor_palette[index][1],
156 s->cursor_palette[index][2]);
161 color = (*rgb_to_pixel)(
162 s->color_palette[index][0],
163 s->color_palette[index][1],
164 s->color_palette[index][2]);
166 memcpy(dd, &color, w);
173 if (y == s->height) {
174 ymax = s->height - 1;
177 data_display = dd = data_display + surface_stride(surface);
189 dpy_gfx_update(s->con, xmin, ymin,
190 xmax - xmin + 1, ymax - ymin + 1);
200 vram += G364_PAGE_SIZE;
201 data_display += dy * surface_stride(surface);
202 dd = data_display + x * w;
204 page += G364_PAGE_SIZE;
209 dpy_gfx_update(s->con, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
214 static void g364fb_draw_blank(G364State *s)
216 DisplaySurface *surface = qemu_console_surface(s->con);
221 /* Screen is already blank. No need to redraw it */
225 w = s->width * surface_bytes_per_pixel(surface);
226 d = surface_data(surface);
227 for (i = 0; i < s->height; i++) {
229 d += surface_stride(surface);
232 dpy_gfx_update_full(s->con);
236 static void g364fb_update_display(void *opaque)
238 G364State *s = opaque;
239 DisplaySurface *surface = qemu_console_surface(s->con);
241 qemu_flush_coalesced_mmio_buffer();
243 if (s->width == 0 || s->height == 0)
246 if (s->width != surface_width(surface) ||
247 s->height != surface_height(surface)) {
248 qemu_console_resize(s->con, s->width, s->height);
251 if (s->ctla & CTLA_FORCE_BLANK) {
252 g364fb_draw_blank(s);
253 } else if (s->depth == 8) {
254 g364fb_draw_graphic8(s);
256 error_report("g364: unknown guest depth %d", s->depth);
259 qemu_irq_raise(s->irq);
262 static inline void g364fb_invalidate_display(void *opaque)
264 G364State *s = opaque;
267 memory_region_set_dirty(&s->mem_vram, 0, s->vram_size);
270 static void g364fb_reset(G364State *s)
272 qemu_irq_lower(s->irq);
274 memset(s->color_palette, 0, sizeof(s->color_palette));
275 memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
276 memset(s->cursor, 0, sizeof(s->cursor));
277 s->cursor_position = 0;
279 s->top_of_screen = 0;
280 s->width = s->height = 0;
281 memset(s->vram, 0, s->vram_size);
282 g364fb_invalidate_display(s);
285 /* called for accesses to io ports */
286 static uint64_t g364fb_ctrl_read(void *opaque,
290 G364State *s = opaque;
293 if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
295 int idx = (addr - REG_CURS_PAT) >> 3;
296 val = s->cursor[idx];
297 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
299 int idx = (addr - REG_CURS_PAL) >> 3;
300 val = ((uint32_t)s->cursor_palette[idx][0] << 16);
301 val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
302 val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
316 error_report("g364: invalid read at [" TARGET_FMT_plx "]",
324 trace_g364fb_read(addr, val);
329 static void g364fb_update_depth(G364State *s)
331 static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
332 s->depth = depths[(s->ctla & 0x00700000) >> 20];
335 static void g364_invalidate_cursor_position(G364State *s)
337 DisplaySurface *surface = qemu_console_surface(s->con);
338 int ymin, ymax, start, end;
340 /* invalidate only near the cursor */
341 ymin = s->cursor_position & 0xfff;
342 ymax = MIN(s->height, ymin + 64);
343 start = ymin * surface_stride(surface);
344 end = (ymax + 1) * surface_stride(surface);
346 memory_region_set_dirty(&s->mem_vram, start, end - start);
349 static void g364fb_ctrl_write(void *opaque,
354 G364State *s = opaque;
356 trace_g364fb_write(addr, val);
358 if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
360 int idx = (addr - REG_CLR_PAL) >> 3;
361 s->color_palette[idx][0] = (val >> 16) & 0xff;
362 s->color_palette[idx][1] = (val >> 8) & 0xff;
363 s->color_palette[idx][2] = val & 0xff;
364 g364fb_invalidate_display(s);
365 } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
367 int idx = (addr - REG_CURS_PAT) >> 3;
368 s->cursor[idx] = val;
369 g364fb_invalidate_display(s);
370 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
372 int idx = (addr - REG_CURS_PAL) >> 3;
373 s->cursor_palette[idx][0] = (val >> 16) & 0xff;
374 s->cursor_palette[idx][1] = (val >> 8) & 0xff;
375 s->cursor_palette[idx][2] = val & 0xff;
376 g364fb_invalidate_display(s);
379 case REG_BOOT: /* Boot timing */
380 case 0x00108: /* Line timing: half sync */
381 case 0x00110: /* Line timing: back porch */
382 case 0x00120: /* Line timing: short display */
383 case 0x00128: /* Frame timing: broad pulse */
384 case 0x00130: /* Frame timing: v sync */
385 case 0x00138: /* Frame timing: v preequalise */
386 case 0x00140: /* Frame timing: v postequalise */
387 case 0x00148: /* Frame timing: v blank */
388 case 0x00158: /* Line timing: line time */
389 case 0x00160: /* Frame store: line start */
390 case 0x00168: /* vram cycle: mem init */
391 case 0x00170: /* vram cycle: transfer delay */
392 case 0x00200: /* vram cycle: mask register */
396 s->top_of_screen = val;
397 g364fb_invalidate_display(s);
407 g364fb_update_depth(s);
408 g364fb_invalidate_display(s);
411 g364_invalidate_cursor_position(s);
412 s->cursor_position = val;
413 g364_invalidate_cursor_position(s);
419 error_report("g364: invalid write of 0x%" PRIx64
420 " at [" TARGET_FMT_plx "]", val, addr);
424 qemu_irq_lower(s->irq);
427 static const MemoryRegionOps g364fb_ctrl_ops = {
428 .read = g364fb_ctrl_read,
429 .write = g364fb_ctrl_write,
430 .endianness = DEVICE_LITTLE_ENDIAN,
431 .impl.min_access_size = 4,
432 .impl.max_access_size = 4,
435 static int g364fb_post_load(void *opaque, int version_id)
437 G364State *s = opaque;
440 g364fb_update_depth(s);
441 g364fb_invalidate_display(s);
446 static const VMStateDescription vmstate_g364fb = {
449 .minimum_version_id = 1,
450 .post_load = g364fb_post_load,
451 .fields = (VMStateField[]) {
452 VMSTATE_VBUFFER_UINT32(vram, G364State, 1, NULL, vram_size),
453 VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3),
454 VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9),
455 VMSTATE_UINT16_ARRAY(cursor, G364State, 512),
456 VMSTATE_UINT32(cursor_position, G364State),
457 VMSTATE_UINT32(ctla, G364State),
458 VMSTATE_UINT32(top_of_screen, G364State),
459 VMSTATE_UINT32(width, G364State),
460 VMSTATE_UINT32(height, G364State),
461 VMSTATE_END_OF_LIST()
465 static const GraphicHwOps g364fb_ops = {
466 .invalidate = g364fb_invalidate_display,
467 .gfx_update = g364fb_update_display,
470 static void g364fb_init(DeviceState *dev, G364State *s)
472 s->vram = g_malloc0(s->vram_size);
474 s->con = graphic_console_init(dev, 0, &g364fb_ops, s);
476 memory_region_init_io(&s->mem_ctrl, NULL, &g364fb_ctrl_ops, s, "ctrl", 0x180000);
477 memory_region_init_ram_ptr(&s->mem_vram, NULL, "vram",
478 s->vram_size, s->vram);
479 vmstate_register_ram(&s->mem_vram, dev);
480 memory_region_set_log(&s->mem_vram, true, DIRTY_MEMORY_VGA);
483 #define TYPE_G364 "sysbus-g364"
484 #define G364(obj) OBJECT_CHECK(G364SysBusState, (obj), TYPE_G364)
487 SysBusDevice parent_obj;
492 static void g364fb_sysbus_realize(DeviceState *dev, Error **errp)
494 G364SysBusState *sbs = G364(dev);
495 G364State *s = &sbs->g364;
496 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
499 sysbus_init_irq(sbd, &s->irq);
500 sysbus_init_mmio(sbd, &s->mem_ctrl);
501 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, 8 * MiB),
513 DEFINE_PROP_END_OF_LIST(),
516 static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
518 DeviceClass *dc = DEVICE_CLASS(klass);
520 dc->realize = g364fb_sysbus_realize;
521 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
522 dc->desc = "G364 framebuffer";
523 dc->reset = g364fb_sysbus_reset;
524 dc->vmsd = &vmstate_g364fb;
525 dc->props = g364fb_sysbus_properties;
528 static const TypeInfo g364fb_sysbus_info = {
530 .parent = TYPE_SYS_BUS_DEVICE,
531 .instance_size = sizeof(G364SysBusState),
532 .class_init = g364fb_sysbus_class_init,
535 static void g364fb_register_types(void)
537 type_register_static(&g364fb_sysbus_info);
540 type_init(g364fb_register_types)