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1.1 root 1: /*
2: * QEMU G364 framebuffer Emulator.
3: *
4: * Copyright (c) 2007-2009 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
1.1.1.2 root 17: * with this program; if not, see <http://www.gnu.org/licenses/>.
1.1 root 18: */
19:
20: #include "hw.h"
21: #include "mips.h"
22: #include "console.h"
23: #include "pixel_ops.h"
24:
25: //#define DEBUG_G364
26:
27: #ifdef DEBUG_G364
1.1.1.2 root 28: #define DPRINTF(fmt, ...) \
29: do { printf("g364: " fmt , ## __VA_ARGS__); } while (0)
1.1 root 30: #else
1.1.1.2 root 31: #define DPRINTF(fmt, ...) do {} while (0)
1.1 root 32: #endif
1.1.1.2 root 33: #define BADF(fmt, ...) \
34: do { fprintf(stderr, "g364 ERROR: " fmt , ## __VA_ARGS__);} while (0)
1.1 root 35:
36: typedef struct G364State {
37: /* hardware */
38: uint8_t *vram;
39: ram_addr_t vram_offset;
40: int vram_size;
41: qemu_irq irq;
42: /* registers */
43: uint8_t color_palette[256][3];
44: uint8_t cursor_palette[3][3];
45: uint16_t cursor[512];
46: uint32_t cursor_position;
47: uint32_t ctla;
48: uint32_t top_of_screen;
49: uint32_t width, height; /* in pixels */
50: /* display refresh support */
51: DisplayState *ds;
52: int depth;
53: int blanked;
54: } G364State;
55:
56: #define REG_ID 0x000000
57: #define REG_BOOT 0x080000
58: #define REG_DISPLAY 0x080118
59: #define REG_VDISPLAY 0x080150
60: #define REG_CTLA 0x080300
61: #define REG_TOP 0x080400
62: #define REG_CURS_PAL 0x080508
63: #define REG_CURS_POS 0x080638
64: #define REG_CLR_PAL 0x080800
65: #define REG_CURS_PAT 0x081000
66: #define REG_RESET 0x180000
67:
68: #define CTLA_FORCE_BLANK 0x00000400
69: #define CTLA_NO_CURSOR 0x00800000
70:
71: static inline int check_dirty(ram_addr_t page)
72: {
73: return cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
74: }
75:
76: static inline void reset_dirty(G364State *s,
77: ram_addr_t page_min, ram_addr_t page_max)
78: {
79: cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE - 1,
80: VGA_DIRTY_FLAG);
81: }
82:
83: static void g364fb_draw_graphic8(G364State *s)
84: {
85: int i, w;
86: uint8_t *vram;
87: uint8_t *data_display, *dd;
88: ram_addr_t page, page_min, page_max;
89: int x, y;
90: int xmin, xmax;
91: int ymin, ymax;
92: int xcursor, ycursor;
93: unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
94:
95: switch (ds_get_bits_per_pixel(s->ds)) {
96: case 8:
97: rgb_to_pixel = rgb_to_pixel8;
98: w = 1;
99: break;
100: case 15:
101: rgb_to_pixel = rgb_to_pixel15;
102: w = 2;
103: break;
104: case 16:
105: rgb_to_pixel = rgb_to_pixel16;
106: w = 2;
107: break;
108: case 32:
109: rgb_to_pixel = rgb_to_pixel32;
110: w = 4;
111: break;
112: default:
113: BADF("unknown host depth %d\n", ds_get_bits_per_pixel(s->ds));
114: return;
115: }
116:
117: page = s->vram_offset;
118: page_min = (ram_addr_t)-1;
119: page_max = 0;
120:
121: x = y = 0;
122: xmin = s->width;
123: xmax = 0;
124: ymin = s->height;
125: ymax = 0;
126:
127: if (!(s->ctla & CTLA_NO_CURSOR)) {
128: xcursor = s->cursor_position >> 12;
129: ycursor = s->cursor_position & 0xfff;
130: } else {
131: xcursor = ycursor = -65;
132: }
133:
134: vram = s->vram + s->top_of_screen;
135: /* XXX: out of range in vram? */
136: data_display = dd = ds_get_data(s->ds);
137: while (y < s->height) {
138: if (check_dirty(page)) {
139: if (y < ymin)
140: ymin = ymax = y;
141: if (page_min == (ram_addr_t)-1)
142: page_min = page;
143: page_max = page;
144: if (x < xmin)
145: xmin = x;
146: for (i = 0; i < TARGET_PAGE_SIZE; i++) {
147: uint8_t index;
148: unsigned int color;
149: if (unlikely((y >= ycursor && y < ycursor + 64) &&
150: (x >= xcursor && x < xcursor + 64))) {
151: /* pointer area */
152: int xdiff = x - xcursor;
153: uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
154: int op = (curs >> ((xdiff & 7) * 2)) & 3;
155: if (likely(op == 0)) {
156: /* transparent */
157: index = *vram;
158: color = (*rgb_to_pixel)(
159: s->color_palette[index][0],
160: s->color_palette[index][1],
161: s->color_palette[index][2]);
162: } else {
163: /* get cursor color */
164: index = op - 1;
165: color = (*rgb_to_pixel)(
166: s->cursor_palette[index][0],
167: s->cursor_palette[index][1],
168: s->cursor_palette[index][2]);
169: }
170: } else {
171: /* normal area */
172: index = *vram;
173: color = (*rgb_to_pixel)(
174: s->color_palette[index][0],
175: s->color_palette[index][1],
176: s->color_palette[index][2]);
177: }
178: memcpy(dd, &color, w);
179: dd += w;
180: x++;
181: vram++;
182: if (x == s->width) {
183: xmax = s->width - 1;
184: y++;
185: if (y == s->height) {
186: ymax = s->height - 1;
187: goto done;
188: }
189: data_display = dd = data_display + ds_get_linesize(s->ds);
190: xmin = 0;
191: x = 0;
192: }
193: }
194: if (x > xmax)
195: xmax = x;
196: if (y > ymax)
197: ymax = y;
198: } else {
199: int dy;
200: if (page_min != (ram_addr_t)-1) {
201: reset_dirty(s, page_min, page_max);
202: page_min = (ram_addr_t)-1;
203: page_max = 0;
204: dpy_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
205: xmin = s->width;
206: xmax = 0;
207: ymin = s->height;
208: ymax = 0;
209: }
210: x += TARGET_PAGE_SIZE;
211: dy = x / s->width;
212: x = x % s->width;
213: y += dy;
214: vram += TARGET_PAGE_SIZE;
215: data_display += dy * ds_get_linesize(s->ds);
216: dd = data_display + x * w;
217: }
218: page += TARGET_PAGE_SIZE;
219: }
220:
221: done:
222: if (page_min != (ram_addr_t)-1) {
223: dpy_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
224: reset_dirty(s, page_min, page_max);
225: }
226: }
227:
228: static void g364fb_draw_blank(G364State *s)
229: {
230: int i, w;
231: uint8_t *d;
232:
233: if (s->blanked) {
234: /* Screen is already blank. No need to redraw it */
235: return;
236: }
237:
238: w = s->width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
239: d = ds_get_data(s->ds);
240: for (i = 0; i < s->height; i++) {
241: memset(d, 0, w);
242: d += ds_get_linesize(s->ds);
243: }
244:
245: dpy_update(s->ds, 0, 0, s->width, s->height);
246: s->blanked = 1;
247: }
248:
249: static void g364fb_update_display(void *opaque)
250: {
251: G364State *s = opaque;
252:
253: if (s->width == 0 || s->height == 0)
254: return;
255:
256: if (s->width != ds_get_width(s->ds) || s->height != ds_get_height(s->ds)) {
257: qemu_console_resize(s->ds, s->width, s->height);
258: }
259:
260: if (s->ctla & CTLA_FORCE_BLANK) {
261: g364fb_draw_blank(s);
262: } else if (s->depth == 8) {
263: g364fb_draw_graphic8(s);
264: } else {
265: BADF("unknown guest depth %d\n", s->depth);
266: }
267:
268: qemu_irq_raise(s->irq);
269: }
270:
1.1.1.3 root 271: static inline void g364fb_invalidate_display(void *opaque)
1.1 root 272: {
273: G364State *s = opaque;
274: int i;
275:
276: s->blanked = 0;
277: for (i = 0; i < s->vram_size; i += TARGET_PAGE_SIZE) {
278: cpu_physical_memory_set_dirty(s->vram_offset + i);
279: }
280: }
281:
282: static void g364fb_reset(void *opaque)
283: {
284: G364State *s = opaque;
285: qemu_irq_lower(s->irq);
286:
287: memset(s->color_palette, 0, sizeof(s->color_palette));
288: memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
289: memset(s->cursor, 0, sizeof(s->cursor));
290: s->cursor_position = 0;
291: s->ctla = 0;
292: s->top_of_screen = 0;
293: s->width = s->height = 0;
294: memset(s->vram, 0, s->vram_size);
295: g364fb_invalidate_display(opaque);
296: }
297:
298: static void g364fb_screen_dump(void *opaque, const char *filename)
299: {
300: G364State *s = opaque;
301: int y, x;
302: uint8_t index;
303: uint8_t *data_buffer;
304: FILE *f;
305:
306: if (s->depth != 8) {
307: BADF("unknown guest depth %d\n", s->depth);
308: return;
309: }
310:
311: f = fopen(filename, "wb");
312: if (!f)
313: return;
314:
315: if (s->ctla & CTLA_FORCE_BLANK) {
316: /* blank screen */
317: fprintf(f, "P4\n%d %d\n",
318: s->width, s->height);
319: for (y = 0; y < s->height; y++)
320: for (x = 0; x < s->width; x++)
321: fputc(0, f);
322: } else {
323: data_buffer = s->vram + s->top_of_screen;
324: fprintf(f, "P6\n%d %d\n%d\n",
325: s->width, s->height, 255);
326: for (y = 0; y < s->height; y++)
327: for (x = 0; x < s->width; x++, data_buffer++) {
328: index = *data_buffer;
329: fputc(s->color_palette[index][0], f);
330: fputc(s->color_palette[index][1], f);
331: fputc(s->color_palette[index][2], f);
332: }
333: }
334:
335: fclose(f);
336: }
337:
338: /* called for accesses to io ports */
339: static uint32_t g364fb_ctrl_readl(void *opaque, target_phys_addr_t addr)
340: {
341: G364State *s = opaque;
342: uint32_t val;
343:
344: if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
345: /* cursor pattern */
346: int idx = (addr - REG_CURS_PAT) >> 3;
347: val = s->cursor[idx];
348: } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
349: /* cursor palette */
350: int idx = (addr - REG_CURS_PAL) >> 3;
351: val = ((uint32_t)s->cursor_palette[idx][0] << 16);
352: val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
353: val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
354: } else {
355: switch (addr) {
356: case REG_ID:
357: val = 0x10; /* Mips G364 */
358: break;
359: case REG_DISPLAY:
360: val = s->width / 4;
361: break;
362: case REG_VDISPLAY:
363: val = s->height * 2;
364: break;
365: case REG_CTLA:
366: val = s->ctla;
367: break;
368: default:
369: {
370: BADF("invalid read at [" TARGET_FMT_plx "]\n", addr);
371: val = 0;
372: break;
373: }
374: }
375: }
376:
377: DPRINTF("read 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
378:
379: return val;
380: }
381:
382: static uint32_t g364fb_ctrl_readw(void *opaque, target_phys_addr_t addr)
383: {
384: uint32_t v = g364fb_ctrl_readl(opaque, addr & ~0x3);
385: if (addr & 0x2)
386: return v >> 16;
387: else
388: return v & 0xffff;
389: }
390:
391: static uint32_t g364fb_ctrl_readb(void *opaque, target_phys_addr_t addr)
392: {
393: uint32_t v = g364fb_ctrl_readl(opaque, addr & ~0x3);
394: return (v >> (8 * (addr & 0x3))) & 0xff;
395: }
396:
397: static void g364fb_update_depth(G364State *s)
398: {
1.1.1.3 root 399: static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
1.1 root 400: s->depth = depths[(s->ctla & 0x00700000) >> 20];
401: }
402:
403: static void g364_invalidate_cursor_position(G364State *s)
404: {
405: int ymin, ymax, start, end, i;
406:
407: /* invalidate only near the cursor */
408: ymin = s->cursor_position & 0xfff;
409: ymax = MIN(s->height, ymin + 64);
410: start = ymin * ds_get_linesize(s->ds);
411: end = (ymax + 1) * ds_get_linesize(s->ds);
412:
413: for (i = start; i < end; i += TARGET_PAGE_SIZE) {
414: cpu_physical_memory_set_dirty(s->vram_offset + i);
415: }
416: }
417:
418: static void g364fb_ctrl_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
419: {
420: G364State *s = opaque;
421:
422: DPRINTF("write 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
423:
424: if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
425: /* color palette */
426: int idx = (addr - REG_CLR_PAL) >> 3;
427: s->color_palette[idx][0] = (val >> 16) & 0xff;
428: s->color_palette[idx][1] = (val >> 8) & 0xff;
429: s->color_palette[idx][2] = val & 0xff;
430: g364fb_invalidate_display(s);
431: } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
432: /* cursor pattern */
433: int idx = (addr - REG_CURS_PAT) >> 3;
434: s->cursor[idx] = val;
435: g364fb_invalidate_display(s);
436: } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
437: /* cursor palette */
438: int idx = (addr - REG_CURS_PAL) >> 3;
439: s->cursor_palette[idx][0] = (val >> 16) & 0xff;
440: s->cursor_palette[idx][1] = (val >> 8) & 0xff;
441: s->cursor_palette[idx][2] = val & 0xff;
442: g364fb_invalidate_display(s);
443: } else {
444: switch (addr) {
445: case REG_ID: /* Card identifier; read-only */
446: case REG_BOOT: /* Boot timing */
447: case 0x80108: /* Line timing: half sync */
448: case 0x80110: /* Line timing: back porch */
449: case 0x80120: /* Line timing: short display */
450: case 0x80128: /* Frame timing: broad pulse */
451: case 0x80130: /* Frame timing: v sync */
452: case 0x80138: /* Frame timing: v preequalise */
453: case 0x80140: /* Frame timing: v postequalise */
454: case 0x80148: /* Frame timing: v blank */
455: case 0x80158: /* Line timing: line time */
456: case 0x80160: /* Frame store: line start */
457: case 0x80168: /* vram cycle: mem init */
458: case 0x80170: /* vram cycle: transfer delay */
459: case 0x80200: /* vram cycle: mask register */
460: /* ignore */
461: break;
462: case REG_TOP:
463: s->top_of_screen = val;
464: g364fb_invalidate_display(s);
465: break;
466: case REG_DISPLAY:
467: s->width = val * 4;
468: break;
469: case REG_VDISPLAY:
470: s->height = val / 2;
471: break;
472: case REG_CTLA:
473: s->ctla = val;
474: g364fb_update_depth(s);
475: g364fb_invalidate_display(s);
476: break;
477: case REG_CURS_POS:
478: g364_invalidate_cursor_position(s);
479: s->cursor_position = val;
480: g364_invalidate_cursor_position(s);
481: break;
482: case REG_RESET:
483: g364fb_reset(s);
484: break;
485: default:
486: BADF("invalid write of 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
487: break;
488: }
489: }
490: qemu_irq_lower(s->irq);
491: }
492:
493: static void g364fb_ctrl_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
494: {
495: uint32_t old_val = g364fb_ctrl_readl(opaque, addr & ~0x3);
496:
497: if (addr & 0x2)
498: val = (val << 16) | (old_val & 0x0000ffff);
499: else
500: val = val | (old_val & 0xffff0000);
501: g364fb_ctrl_writel(opaque, addr & ~0x3, val);
502: }
503:
504: static void g364fb_ctrl_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
505: {
506: uint32_t old_val = g364fb_ctrl_readl(opaque, addr & ~0x3);
507:
508: switch (addr & 3) {
509: case 0:
510: val = val | (old_val & 0xffffff00);
511: break;
512: case 1:
513: val = (val << 8) | (old_val & 0xffff00ff);
514: break;
515: case 2:
516: val = (val << 16) | (old_val & 0xff00ffff);
517: break;
518: case 3:
519: val = (val << 24) | (old_val & 0x00ffffff);
520: break;
521: }
522: g364fb_ctrl_writel(opaque, addr & ~0x3, val);
523: }
524:
1.1.1.3 root 525: static CPUReadMemoryFunc * const g364fb_ctrl_read[3] = {
1.1 root 526: g364fb_ctrl_readb,
527: g364fb_ctrl_readw,
528: g364fb_ctrl_readl,
529: };
530:
1.1.1.3 root 531: static CPUWriteMemoryFunc * const g364fb_ctrl_write[3] = {
1.1 root 532: g364fb_ctrl_writeb,
533: g364fb_ctrl_writew,
534: g364fb_ctrl_writel,
535: };
536:
537: static int g364fb_load(QEMUFile *f, void *opaque, int version_id)
538: {
539: G364State *s = opaque;
540: unsigned int i, vram_size;
541:
542: if (version_id != 1)
543: return -EINVAL;
544:
545: vram_size = qemu_get_be32(f);
546: if (vram_size < s->vram_size)
547: return -EINVAL;
548: qemu_get_buffer(f, s->vram, s->vram_size);
549: for (i = 0; i < 256; i++)
550: qemu_get_buffer(f, s->color_palette[i], 3);
551: for (i = 0; i < 3; i++)
552: qemu_get_buffer(f, s->cursor_palette[i], 3);
553: qemu_get_buffer(f, (uint8_t *)s->cursor, sizeof(s->cursor));
554: s->cursor_position = qemu_get_be32(f);
555: s->ctla = qemu_get_be32(f);
556: s->top_of_screen = qemu_get_be32(f);
557: s->width = qemu_get_be32(f);
558: s->height = qemu_get_be32(f);
559:
560: /* force refresh */
561: g364fb_update_depth(s);
562: g364fb_invalidate_display(s);
563:
564: return 0;
565: }
566:
567: static void g364fb_save(QEMUFile *f, void *opaque)
568: {
569: G364State *s = opaque;
570: int i;
571:
572: qemu_put_be32(f, s->vram_size);
573: qemu_put_buffer(f, s->vram, s->vram_size);
574: for (i = 0; i < 256; i++)
575: qemu_put_buffer(f, s->color_palette[i], 3);
576: for (i = 0; i < 3; i++)
577: qemu_put_buffer(f, s->cursor_palette[i], 3);
578: qemu_put_buffer(f, (uint8_t *)s->cursor, sizeof(s->cursor));
579: qemu_put_be32(f, s->cursor_position);
580: qemu_put_be32(f, s->ctla);
581: qemu_put_be32(f, s->top_of_screen);
582: qemu_put_be32(f, s->width);
583: qemu_put_be32(f, s->height);
584: }
585:
1.1.1.2 root 586: int g364fb_mm_init(target_phys_addr_t vram_base,
1.1 root 587: target_phys_addr_t ctrl_base, int it_shift,
588: qemu_irq irq)
589: {
590: G364State *s;
591: int io_ctrl;
592:
593: s = qemu_mallocz(sizeof(G364State));
594:
1.1.1.2 root 595: s->vram_size = 8 * 1024 * 1024;
1.1.1.4 ! root 596: s->vram_offset = qemu_ram_alloc(NULL, "g364fb.vram", s->vram_size);
1.1.1.2 root 597: s->vram = qemu_get_ram_ptr(s->vram_offset);
1.1 root 598: s->irq = irq;
599:
600: qemu_register_reset(g364fb_reset, s);
1.1.1.4 ! root 601: register_savevm(NULL, "g364fb", 0, 1, g364fb_save, g364fb_load, s);
1.1 root 602: g364fb_reset(s);
603:
604: s->ds = graphic_console_init(g364fb_update_display,
605: g364fb_invalidate_display,
606: g364fb_screen_dump, NULL, s);
607:
608: cpu_register_physical_memory(vram_base, s->vram_size, s->vram_offset);
609:
1.1.1.2 root 610: io_ctrl = cpu_register_io_memory(g364fb_ctrl_read, g364fb_ctrl_write, s);
1.1 root 611: cpu_register_physical_memory(ctrl_base, 0x200000, io_ctrl);
612:
613: return 0;
614: }
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