2 * QEMU G364 framebuffer Emulator.
4 * Copyright (c) 2007-2009 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, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include "pixel_ops.h"
29 #define DPRINTF(fmt, args...) \
30 do { printf("g364: " fmt , ##args); } while (0)
32 #define DPRINTF(fmt, args...) do {} while (0)
34 #define BADF(fmt, args...) \
35 do { fprintf(stderr, "g364 ERROR: " fmt , ##args);} while (0)
37 typedef struct G364State {
40 ram_addr_t vram_offset;
44 uint8_t color_palette[256][3];
45 uint8_t cursor_palette[3][3];
47 uint32_t cursor_position;
49 uint32_t top_of_screen;
50 uint32_t width, height; /* in pixels */
51 /* display refresh support */
57 #define REG_ID 0x000000
58 #define REG_BOOT 0x080000
59 #define REG_DISPLAY 0x080118
60 #define REG_VDISPLAY 0x080150
61 #define REG_CTLA 0x080300
62 #define REG_TOP 0x080400
63 #define REG_CURS_PAL 0x080508
64 #define REG_CURS_POS 0x080638
65 #define REG_CLR_PAL 0x080800
66 #define REG_CURS_PAT 0x081000
67 #define REG_RESET 0x180000
69 #define CTLA_FORCE_BLANK 0x00000400
70 #define CTLA_NO_CURSOR 0x00800000
72 static inline int check_dirty(ram_addr_t page)
74 return cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
77 static inline void reset_dirty(G364State *s,
78 ram_addr_t page_min, ram_addr_t page_max)
80 cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE - 1,
84 static void g364fb_draw_graphic8(G364State *s)
88 uint8_t *data_display, *dd;
89 ram_addr_t page, page_min, page_max;
94 unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
96 switch (ds_get_bits_per_pixel(s->ds)) {
98 rgb_to_pixel = rgb_to_pixel8;
102 rgb_to_pixel = rgb_to_pixel15;
106 rgb_to_pixel = rgb_to_pixel16;
110 rgb_to_pixel = rgb_to_pixel32;
114 BADF("unknown host depth %d\n", ds_get_bits_per_pixel(s->ds));
118 page = s->vram_offset;
119 page_min = (ram_addr_t)-1;
128 if (!(s->ctla & CTLA_NO_CURSOR)) {
129 xcursor = s->cursor_position >> 12;
130 ycursor = s->cursor_position & 0xfff;
132 xcursor = ycursor = -65;
135 vram = s->vram + s->top_of_screen;
136 /* XXX: out of range in vram? */
137 data_display = dd = ds_get_data(s->ds);
138 while (y < s->height) {
139 if (check_dirty(page)) {
142 if (page_min == (ram_addr_t)-1)
147 for (i = 0; i < TARGET_PAGE_SIZE; i++) {
150 if (unlikely((y >= ycursor && y < ycursor + 64) &&
151 (x >= xcursor && x < xcursor + 64))) {
153 int xdiff = x - xcursor;
154 uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
155 int op = (curs >> ((xdiff & 7) * 2)) & 3;
156 if (likely(op == 0)) {
159 color = (*rgb_to_pixel)(
160 s->color_palette[index][0],
161 s->color_palette[index][1],
162 s->color_palette[index][2]);
164 /* get cursor color */
166 color = (*rgb_to_pixel)(
167 s->cursor_palette[index][0],
168 s->cursor_palette[index][1],
169 s->cursor_palette[index][2]);
174 color = (*rgb_to_pixel)(
175 s->color_palette[index][0],
176 s->color_palette[index][1],
177 s->color_palette[index][2]);
179 memcpy(dd, &color, w);
186 if (y == s->height) {
187 ymax = s->height - 1;
190 data_display = dd = data_display + ds_get_linesize(s->ds);
201 if (page_min != (ram_addr_t)-1) {
202 reset_dirty(s, page_min, page_max);
203 page_min = (ram_addr_t)-1;
205 dpy_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
211 x += TARGET_PAGE_SIZE;
215 vram += TARGET_PAGE_SIZE;
216 data_display += dy * ds_get_linesize(s->ds);
217 dd = data_display + x * w;
219 page += TARGET_PAGE_SIZE;
223 if (page_min != (ram_addr_t)-1) {
224 dpy_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
225 reset_dirty(s, page_min, page_max);
229 static void g364fb_draw_blank(G364State *s)
235 /* Screen is already blank. No need to redraw it */
239 w = s->width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
240 d = ds_get_data(s->ds);
241 for (i = 0; i < s->height; i++) {
243 d += ds_get_linesize(s->ds);
246 dpy_update(s->ds, 0, 0, s->width, s->height);
250 static void g364fb_update_display(void *opaque)
252 G364State *s = opaque;
254 if (s->width == 0 || s->height == 0)
257 if (s->width != ds_get_width(s->ds) || s->height != ds_get_height(s->ds)) {
258 qemu_console_resize(s->ds, s->width, s->height);
261 if (s->ctla & CTLA_FORCE_BLANK) {
262 g364fb_draw_blank(s);
263 } else if (s->depth == 8) {
264 g364fb_draw_graphic8(s);
266 BADF("unknown guest depth %d\n", s->depth);
269 qemu_irq_raise(s->irq);
272 static void inline g364fb_invalidate_display(void *opaque)
274 G364State *s = opaque;
278 for (i = 0; i < s->vram_size; i += TARGET_PAGE_SIZE) {
279 cpu_physical_memory_set_dirty(s->vram_offset + i);
283 static void g364fb_reset(void *opaque)
285 G364State *s = opaque;
286 qemu_irq_lower(s->irq);
288 memset(s->color_palette, 0, sizeof(s->color_palette));
289 memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
290 memset(s->cursor, 0, sizeof(s->cursor));
291 s->cursor_position = 0;
293 s->top_of_screen = 0;
294 s->width = s->height = 0;
295 memset(s->vram, 0, s->vram_size);
296 g364fb_invalidate_display(opaque);
299 static void g364fb_screen_dump(void *opaque, const char *filename)
301 G364State *s = opaque;
304 uint8_t *data_buffer;
308 BADF("unknown guest depth %d\n", s->depth);
312 f = fopen(filename, "wb");
316 if (s->ctla & CTLA_FORCE_BLANK) {
318 fprintf(f, "P4\n%d %d\n",
319 s->width, s->height);
320 for (y = 0; y < s->height; y++)
321 for (x = 0; x < s->width; x++)
324 data_buffer = s->vram + s->top_of_screen;
325 fprintf(f, "P6\n%d %d\n%d\n",
326 s->width, s->height, 255);
327 for (y = 0; y < s->height; y++)
328 for (x = 0; x < s->width; x++, data_buffer++) {
329 index = *data_buffer;
330 fputc(s->color_palette[index][0], f);
331 fputc(s->color_palette[index][1], f);
332 fputc(s->color_palette[index][2], f);
339 /* called for accesses to io ports */
340 static uint32_t g364fb_ctrl_readl(void *opaque, target_phys_addr_t addr)
342 G364State *s = opaque;
345 if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
347 int idx = (addr - REG_CURS_PAT) >> 3;
348 val = s->cursor[idx];
349 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
351 int idx = (addr - REG_CURS_PAL) >> 3;
352 val = ((uint32_t)s->cursor_palette[idx][0] << 16);
353 val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
354 val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
358 val = 0x10; /* Mips G364 */
371 BADF("invalid read at [" TARGET_FMT_plx "]\n", addr);
378 DPRINTF("read 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
383 static uint32_t g364fb_ctrl_readw(void *opaque, target_phys_addr_t addr)
385 uint32_t v = g364fb_ctrl_readl(opaque, addr & ~0x3);
392 static uint32_t g364fb_ctrl_readb(void *opaque, target_phys_addr_t addr)
394 uint32_t v = g364fb_ctrl_readl(opaque, addr & ~0x3);
395 return (v >> (8 * (addr & 0x3))) & 0xff;
398 static void g364fb_update_depth(G364State *s)
400 const static int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
401 s->depth = depths[(s->ctla & 0x00700000) >> 20];
404 static void g364_invalidate_cursor_position(G364State *s)
406 int ymin, ymax, start, end, i;
408 /* invalidate only near the cursor */
409 ymin = s->cursor_position & 0xfff;
410 ymax = MIN(s->height, ymin + 64);
411 start = ymin * ds_get_linesize(s->ds);
412 end = (ymax + 1) * ds_get_linesize(s->ds);
414 for (i = start; i < end; i += TARGET_PAGE_SIZE) {
415 cpu_physical_memory_set_dirty(s->vram_offset + i);
419 static void g364fb_ctrl_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
421 G364State *s = opaque;
423 DPRINTF("write 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
425 if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
427 int idx = (addr - REG_CLR_PAL) >> 3;
428 s->color_palette[idx][0] = (val >> 16) & 0xff;
429 s->color_palette[idx][1] = (val >> 8) & 0xff;
430 s->color_palette[idx][2] = val & 0xff;
431 g364fb_invalidate_display(s);
432 } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
434 int idx = (addr - REG_CURS_PAT) >> 3;
435 s->cursor[idx] = val;
436 g364fb_invalidate_display(s);
437 } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
439 int idx = (addr - REG_CURS_PAL) >> 3;
440 s->cursor_palette[idx][0] = (val >> 16) & 0xff;
441 s->cursor_palette[idx][1] = (val >> 8) & 0xff;
442 s->cursor_palette[idx][2] = val & 0xff;
443 g364fb_invalidate_display(s);
446 case REG_ID: /* Card identifier; read-only */
447 case REG_BOOT: /* Boot timing */
448 case 0x80108: /* Line timing: half sync */
449 case 0x80110: /* Line timing: back porch */
450 case 0x80120: /* Line timing: short display */
451 case 0x80128: /* Frame timing: broad pulse */
452 case 0x80130: /* Frame timing: v sync */
453 case 0x80138: /* Frame timing: v preequalise */
454 case 0x80140: /* Frame timing: v postequalise */
455 case 0x80148: /* Frame timing: v blank */
456 case 0x80158: /* Line timing: line time */
457 case 0x80160: /* Frame store: line start */
458 case 0x80168: /* vram cycle: mem init */
459 case 0x80170: /* vram cycle: transfer delay */
460 case 0x80200: /* vram cycle: mask register */
464 s->top_of_screen = val;
465 g364fb_invalidate_display(s);
475 g364fb_update_depth(s);
476 g364fb_invalidate_display(s);
479 g364_invalidate_cursor_position(s);
480 s->cursor_position = val;
481 g364_invalidate_cursor_position(s);
487 BADF("invalid write of 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
491 qemu_irq_lower(s->irq);
494 static void g364fb_ctrl_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
496 uint32_t old_val = g364fb_ctrl_readl(opaque, addr & ~0x3);
499 val = (val << 16) | (old_val & 0x0000ffff);
501 val = val | (old_val & 0xffff0000);
502 g364fb_ctrl_writel(opaque, addr & ~0x3, val);
505 static void g364fb_ctrl_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
507 uint32_t old_val = g364fb_ctrl_readl(opaque, addr & ~0x3);
511 val = val | (old_val & 0xffffff00);
514 val = (val << 8) | (old_val & 0xffff00ff);
517 val = (val << 16) | (old_val & 0xff00ffff);
520 val = (val << 24) | (old_val & 0x00ffffff);
523 g364fb_ctrl_writel(opaque, addr & ~0x3, val);
526 static CPUReadMemoryFunc *g364fb_ctrl_read[3] = {
532 static CPUWriteMemoryFunc *g364fb_ctrl_write[3] = {
538 static int g364fb_load(QEMUFile *f, void *opaque, int version_id)
540 G364State *s = opaque;
541 unsigned int i, vram_size;
546 vram_size = qemu_get_be32(f);
547 if (vram_size < s->vram_size)
549 qemu_get_buffer(f, s->vram, s->vram_size);
550 for (i = 0; i < 256; i++)
551 qemu_get_buffer(f, s->color_palette[i], 3);
552 for (i = 0; i < 3; i++)
553 qemu_get_buffer(f, s->cursor_palette[i], 3);
554 qemu_get_buffer(f, (uint8_t *)s->cursor, sizeof(s->cursor));
555 s->cursor_position = qemu_get_be32(f);
556 s->ctla = qemu_get_be32(f);
557 s->top_of_screen = qemu_get_be32(f);
558 s->width = qemu_get_be32(f);
559 s->height = qemu_get_be32(f);
562 g364fb_update_depth(s);
563 g364fb_invalidate_display(s);
568 static void g364fb_save(QEMUFile *f, void *opaque)
570 G364State *s = opaque;
573 qemu_put_be32(f, s->vram_size);
574 qemu_put_buffer(f, s->vram, s->vram_size);
575 for (i = 0; i < 256; i++)
576 qemu_put_buffer(f, s->color_palette[i], 3);
577 for (i = 0; i < 3; i++)
578 qemu_put_buffer(f, s->cursor_palette[i], 3);
579 qemu_put_buffer(f, (uint8_t *)s->cursor, sizeof(s->cursor));
580 qemu_put_be32(f, s->cursor_position);
581 qemu_put_be32(f, s->ctla);
582 qemu_put_be32(f, s->top_of_screen);
583 qemu_put_be32(f, s->width);
584 qemu_put_be32(f, s->height);
587 int g364fb_mm_init(target_phys_addr_t vram_base,
588 target_phys_addr_t ctrl_base, int it_shift,
594 s = qemu_mallocz(sizeof(G364State));
596 s->vram_size = 8 * 1024 * 1024;
597 s->vram_offset = qemu_ram_alloc(s->vram_size);
598 s->vram = qemu_get_ram_ptr(s->vram_offset);
601 qemu_register_reset(g364fb_reset, s);
602 register_savevm("g364fb", 0, 1, g364fb_save, g364fb_load, s);
605 s->ds = graphic_console_init(g364fb_update_display,
606 g364fb_invalidate_display,
607 g364fb_screen_dump, NULL, s);
609 cpu_register_physical_memory(vram_base, s->vram_size, s->vram_offset);
611 io_ctrl = cpu_register_io_memory(0, g364fb_ctrl_read, g364fb_ctrl_write, s);
612 cpu_register_physical_memory(ctrl_base, 0x200000, io_ctrl);