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[thirdparty/qemu.git] / hw / vga.c
1 /*
2 * QEMU VGA Emulator.
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "hw/hw.h"
25 #include "hw/vga.h"
26 #include "ui/console.h"
27 #include "hw/i386/pc.h"
28 #include "hw/pci/pci.h"
29 #include "hw/vga_int.h"
30 #include "ui/pixel_ops.h"
31 #include "qemu/timer.h"
32 #include "hw/xen/xen.h"
33 #include "trace.h"
34
35 //#define DEBUG_VGA
36 //#define DEBUG_VGA_MEM
37 //#define DEBUG_VGA_REG
38
39 //#define DEBUG_BOCHS_VBE
40
41 /* 16 state changes per vertical frame @60 Hz */
42 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
43
44 /*
45 * Video Graphics Array (VGA)
46 *
47 * Chipset docs for original IBM VGA:
48 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
49 *
50 * FreeVGA site:
51 * http://www.osdever.net/FreeVGA/home.htm
52 *
53 * Standard VGA features and Bochs VBE extensions are implemented.
54 */
55
56 /* force some bits to zero */
57 const uint8_t sr_mask[8] = {
58 0x03,
59 0x3d,
60 0x0f,
61 0x3f,
62 0x0e,
63 0x00,
64 0x00,
65 0xff,
66 };
67
68 const uint8_t gr_mask[16] = {
69 0x0f, /* 0x00 */
70 0x0f, /* 0x01 */
71 0x0f, /* 0x02 */
72 0x1f, /* 0x03 */
73 0x03, /* 0x04 */
74 0x7b, /* 0x05 */
75 0x0f, /* 0x06 */
76 0x0f, /* 0x07 */
77 0xff, /* 0x08 */
78 0x00, /* 0x09 */
79 0x00, /* 0x0a */
80 0x00, /* 0x0b */
81 0x00, /* 0x0c */
82 0x00, /* 0x0d */
83 0x00, /* 0x0e */
84 0x00, /* 0x0f */
85 };
86
87 #define cbswap_32(__x) \
88 ((uint32_t)( \
89 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
90 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
91 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
92 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
93
94 #ifdef HOST_WORDS_BIGENDIAN
95 #define PAT(x) cbswap_32(x)
96 #else
97 #define PAT(x) (x)
98 #endif
99
100 #ifdef HOST_WORDS_BIGENDIAN
101 #define BIG 1
102 #else
103 #define BIG 0
104 #endif
105
106 #ifdef HOST_WORDS_BIGENDIAN
107 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
108 #else
109 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
110 #endif
111
112 static const uint32_t mask16[16] = {
113 PAT(0x00000000),
114 PAT(0x000000ff),
115 PAT(0x0000ff00),
116 PAT(0x0000ffff),
117 PAT(0x00ff0000),
118 PAT(0x00ff00ff),
119 PAT(0x00ffff00),
120 PAT(0x00ffffff),
121 PAT(0xff000000),
122 PAT(0xff0000ff),
123 PAT(0xff00ff00),
124 PAT(0xff00ffff),
125 PAT(0xffff0000),
126 PAT(0xffff00ff),
127 PAT(0xffffff00),
128 PAT(0xffffffff),
129 };
130
131 #undef PAT
132
133 #ifdef HOST_WORDS_BIGENDIAN
134 #define PAT(x) (x)
135 #else
136 #define PAT(x) cbswap_32(x)
137 #endif
138
139 static const uint32_t dmask16[16] = {
140 PAT(0x00000000),
141 PAT(0x000000ff),
142 PAT(0x0000ff00),
143 PAT(0x0000ffff),
144 PAT(0x00ff0000),
145 PAT(0x00ff00ff),
146 PAT(0x00ffff00),
147 PAT(0x00ffffff),
148 PAT(0xff000000),
149 PAT(0xff0000ff),
150 PAT(0xff00ff00),
151 PAT(0xff00ffff),
152 PAT(0xffff0000),
153 PAT(0xffff00ff),
154 PAT(0xffffff00),
155 PAT(0xffffffff),
156 };
157
158 static const uint32_t dmask4[4] = {
159 PAT(0x00000000),
160 PAT(0x0000ffff),
161 PAT(0xffff0000),
162 PAT(0xffffffff),
163 };
164
165 static uint32_t expand4[256];
166 static uint16_t expand2[256];
167 static uint8_t expand4to8[16];
168
169 static void vga_screen_dump(void *opaque, const char *filename, bool cswitch,
170 Error **errp);
171
172 static void vga_update_memory_access(VGACommonState *s)
173 {
174 MemoryRegion *region, *old_region = s->chain4_alias;
175 hwaddr base, offset, size;
176
177 s->chain4_alias = NULL;
178
179 if ((s->sr[VGA_SEQ_PLANE_WRITE] & VGA_SR02_ALL_PLANES) ==
180 VGA_SR02_ALL_PLANES && s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
181 offset = 0;
182 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
183 case 0:
184 base = 0xa0000;
185 size = 0x20000;
186 break;
187 case 1:
188 base = 0xa0000;
189 size = 0x10000;
190 offset = s->bank_offset;
191 break;
192 case 2:
193 base = 0xb0000;
194 size = 0x8000;
195 break;
196 case 3:
197 default:
198 base = 0xb8000;
199 size = 0x8000;
200 break;
201 }
202 base += isa_mem_base;
203 region = g_malloc(sizeof(*region));
204 memory_region_init_alias(region, "vga.chain4", &s->vram, offset, size);
205 memory_region_add_subregion_overlap(s->legacy_address_space, base,
206 region, 2);
207 s->chain4_alias = region;
208 }
209 if (old_region) {
210 memory_region_del_subregion(s->legacy_address_space, old_region);
211 memory_region_destroy(old_region);
212 g_free(old_region);
213 s->plane_updated = 0xf;
214 }
215 }
216
217 static void vga_dumb_update_retrace_info(VGACommonState *s)
218 {
219 (void) s;
220 }
221
222 static void vga_precise_update_retrace_info(VGACommonState *s)
223 {
224 int htotal_chars;
225 int hretr_start_char;
226 int hretr_skew_chars;
227 int hretr_end_char;
228
229 int vtotal_lines;
230 int vretr_start_line;
231 int vretr_end_line;
232
233 int dots;
234 #if 0
235 int div2, sldiv2;
236 #endif
237 int clocking_mode;
238 int clock_sel;
239 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
240 int64_t chars_per_sec;
241 struct vga_precise_retrace *r = &s->retrace_info.precise;
242
243 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
244 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
245 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
246 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
247
248 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
249 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
250 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
251 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
252 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
253 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
254 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
255
256 clocking_mode = (s->sr[VGA_SEQ_CLOCK_MODE] >> 3) & 1;
257 clock_sel = (s->msr >> 2) & 3;
258 dots = (s->msr & 1) ? 8 : 9;
259
260 chars_per_sec = clk_hz[clock_sel] / dots;
261
262 htotal_chars <<= clocking_mode;
263
264 r->total_chars = vtotal_lines * htotal_chars;
265 if (r->freq) {
266 r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq);
267 } else {
268 r->ticks_per_char = get_ticks_per_sec() / chars_per_sec;
269 }
270
271 r->vstart = vretr_start_line;
272 r->vend = r->vstart + vretr_end_line + 1;
273
274 r->hstart = hretr_start_char + hretr_skew_chars;
275 r->hend = r->hstart + hretr_end_char + 1;
276 r->htotal = htotal_chars;
277
278 #if 0
279 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
280 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
281 printf (
282 "hz=%f\n"
283 "htotal = %d\n"
284 "hretr_start = %d\n"
285 "hretr_skew = %d\n"
286 "hretr_end = %d\n"
287 "vtotal = %d\n"
288 "vretr_start = %d\n"
289 "vretr_end = %d\n"
290 "div2 = %d sldiv2 = %d\n"
291 "clocking_mode = %d\n"
292 "clock_sel = %d %d\n"
293 "dots = %d\n"
294 "ticks/char = %" PRId64 "\n"
295 "\n",
296 (double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars),
297 htotal_chars,
298 hretr_start_char,
299 hretr_skew_chars,
300 hretr_end_char,
301 vtotal_lines,
302 vretr_start_line,
303 vretr_end_line,
304 div2, sldiv2,
305 clocking_mode,
306 clock_sel,
307 clk_hz[clock_sel],
308 dots,
309 r->ticks_per_char
310 );
311 #endif
312 }
313
314 static uint8_t vga_precise_retrace(VGACommonState *s)
315 {
316 struct vga_precise_retrace *r = &s->retrace_info.precise;
317 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
318
319 if (r->total_chars) {
320 int cur_line, cur_line_char, cur_char;
321 int64_t cur_tick;
322
323 cur_tick = qemu_get_clock_ns(vm_clock);
324
325 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
326 cur_line = cur_char / r->htotal;
327
328 if (cur_line >= r->vstart && cur_line <= r->vend) {
329 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
330 } else {
331 cur_line_char = cur_char % r->htotal;
332 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
333 val |= ST01_DISP_ENABLE;
334 }
335 }
336
337 return val;
338 } else {
339 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
340 }
341 }
342
343 static uint8_t vga_dumb_retrace(VGACommonState *s)
344 {
345 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
346 }
347
348 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
349 {
350 if (s->msr & VGA_MIS_COLOR) {
351 /* Color */
352 return (addr >= 0x3b0 && addr <= 0x3bf);
353 } else {
354 /* Monochrome */
355 return (addr >= 0x3d0 && addr <= 0x3df);
356 }
357 }
358
359 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
360 {
361 VGACommonState *s = opaque;
362 int val, index;
363
364 qemu_flush_coalesced_mmio_buffer();
365
366 if (vga_ioport_invalid(s, addr)) {
367 val = 0xff;
368 } else {
369 switch(addr) {
370 case VGA_ATT_W:
371 if (s->ar_flip_flop == 0) {
372 val = s->ar_index;
373 } else {
374 val = 0;
375 }
376 break;
377 case VGA_ATT_R:
378 index = s->ar_index & 0x1f;
379 if (index < VGA_ATT_C) {
380 val = s->ar[index];
381 } else {
382 val = 0;
383 }
384 break;
385 case VGA_MIS_W:
386 val = s->st00;
387 break;
388 case VGA_SEQ_I:
389 val = s->sr_index;
390 break;
391 case VGA_SEQ_D:
392 val = s->sr[s->sr_index];
393 #ifdef DEBUG_VGA_REG
394 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
395 #endif
396 break;
397 case VGA_PEL_IR:
398 val = s->dac_state;
399 break;
400 case VGA_PEL_IW:
401 val = s->dac_write_index;
402 break;
403 case VGA_PEL_D:
404 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
405 if (++s->dac_sub_index == 3) {
406 s->dac_sub_index = 0;
407 s->dac_read_index++;
408 }
409 break;
410 case VGA_FTC_R:
411 val = s->fcr;
412 break;
413 case VGA_MIS_R:
414 val = s->msr;
415 break;
416 case VGA_GFX_I:
417 val = s->gr_index;
418 break;
419 case VGA_GFX_D:
420 val = s->gr[s->gr_index];
421 #ifdef DEBUG_VGA_REG
422 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
423 #endif
424 break;
425 case VGA_CRT_IM:
426 case VGA_CRT_IC:
427 val = s->cr_index;
428 break;
429 case VGA_CRT_DM:
430 case VGA_CRT_DC:
431 val = s->cr[s->cr_index];
432 #ifdef DEBUG_VGA_REG
433 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
434 #endif
435 break;
436 case VGA_IS1_RM:
437 case VGA_IS1_RC:
438 /* just toggle to fool polling */
439 val = s->st01 = s->retrace(s);
440 s->ar_flip_flop = 0;
441 break;
442 default:
443 val = 0x00;
444 break;
445 }
446 }
447 #if defined(DEBUG_VGA)
448 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
449 #endif
450 return val;
451 }
452
453 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
454 {
455 VGACommonState *s = opaque;
456 int index;
457
458 qemu_flush_coalesced_mmio_buffer();
459
460 /* check port range access depending on color/monochrome mode */
461 if (vga_ioport_invalid(s, addr)) {
462 return;
463 }
464 #ifdef DEBUG_VGA
465 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
466 #endif
467
468 switch(addr) {
469 case VGA_ATT_W:
470 if (s->ar_flip_flop == 0) {
471 val &= 0x3f;
472 s->ar_index = val;
473 } else {
474 index = s->ar_index & 0x1f;
475 switch(index) {
476 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
477 s->ar[index] = val & 0x3f;
478 break;
479 case VGA_ATC_MODE:
480 s->ar[index] = val & ~0x10;
481 break;
482 case VGA_ATC_OVERSCAN:
483 s->ar[index] = val;
484 break;
485 case VGA_ATC_PLANE_ENABLE:
486 s->ar[index] = val & ~0xc0;
487 break;
488 case VGA_ATC_PEL:
489 s->ar[index] = val & ~0xf0;
490 break;
491 case VGA_ATC_COLOR_PAGE:
492 s->ar[index] = val & ~0xf0;
493 break;
494 default:
495 break;
496 }
497 }
498 s->ar_flip_flop ^= 1;
499 break;
500 case VGA_MIS_W:
501 s->msr = val & ~0x10;
502 s->update_retrace_info(s);
503 break;
504 case VGA_SEQ_I:
505 s->sr_index = val & 7;
506 break;
507 case VGA_SEQ_D:
508 #ifdef DEBUG_VGA_REG
509 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
510 #endif
511 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
512 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
513 s->update_retrace_info(s);
514 }
515 vga_update_memory_access(s);
516 break;
517 case VGA_PEL_IR:
518 s->dac_read_index = val;
519 s->dac_sub_index = 0;
520 s->dac_state = 3;
521 break;
522 case VGA_PEL_IW:
523 s->dac_write_index = val;
524 s->dac_sub_index = 0;
525 s->dac_state = 0;
526 break;
527 case VGA_PEL_D:
528 s->dac_cache[s->dac_sub_index] = val;
529 if (++s->dac_sub_index == 3) {
530 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
531 s->dac_sub_index = 0;
532 s->dac_write_index++;
533 }
534 break;
535 case VGA_GFX_I:
536 s->gr_index = val & 0x0f;
537 break;
538 case VGA_GFX_D:
539 #ifdef DEBUG_VGA_REG
540 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
541 #endif
542 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
543 vga_update_memory_access(s);
544 break;
545 case VGA_CRT_IM:
546 case VGA_CRT_IC:
547 s->cr_index = val;
548 break;
549 case VGA_CRT_DM:
550 case VGA_CRT_DC:
551 #ifdef DEBUG_VGA_REG
552 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
553 #endif
554 /* handle CR0-7 protection */
555 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
556 s->cr_index <= VGA_CRTC_OVERFLOW) {
557 /* can always write bit 4 of CR7 */
558 if (s->cr_index == VGA_CRTC_OVERFLOW) {
559 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
560 (val & 0x10);
561 }
562 return;
563 }
564 s->cr[s->cr_index] = val;
565
566 switch(s->cr_index) {
567 case VGA_CRTC_H_TOTAL:
568 case VGA_CRTC_H_SYNC_START:
569 case VGA_CRTC_H_SYNC_END:
570 case VGA_CRTC_V_TOTAL:
571 case VGA_CRTC_OVERFLOW:
572 case VGA_CRTC_V_SYNC_END:
573 case VGA_CRTC_MODE:
574 s->update_retrace_info(s);
575 break;
576 }
577 break;
578 case VGA_IS1_RM:
579 case VGA_IS1_RC:
580 s->fcr = val & 0x10;
581 break;
582 }
583 }
584
585 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
586 {
587 VGACommonState *s = opaque;
588 uint32_t val;
589 val = s->vbe_index;
590 return val;
591 }
592
593 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
594 {
595 VGACommonState *s = opaque;
596 uint32_t val;
597
598 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
599 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
600 switch(s->vbe_index) {
601 /* XXX: do not hardcode ? */
602 case VBE_DISPI_INDEX_XRES:
603 val = VBE_DISPI_MAX_XRES;
604 break;
605 case VBE_DISPI_INDEX_YRES:
606 val = VBE_DISPI_MAX_YRES;
607 break;
608 case VBE_DISPI_INDEX_BPP:
609 val = VBE_DISPI_MAX_BPP;
610 break;
611 default:
612 val = s->vbe_regs[s->vbe_index];
613 break;
614 }
615 } else {
616 val = s->vbe_regs[s->vbe_index];
617 }
618 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
619 val = s->vram_size / (64 * 1024);
620 } else {
621 val = 0;
622 }
623 #ifdef DEBUG_BOCHS_VBE
624 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
625 #endif
626 return val;
627 }
628
629 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
630 {
631 VGACommonState *s = opaque;
632 s->vbe_index = val;
633 }
634
635 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
636 {
637 VGACommonState *s = opaque;
638
639 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
640 #ifdef DEBUG_BOCHS_VBE
641 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
642 #endif
643 switch(s->vbe_index) {
644 case VBE_DISPI_INDEX_ID:
645 if (val == VBE_DISPI_ID0 ||
646 val == VBE_DISPI_ID1 ||
647 val == VBE_DISPI_ID2 ||
648 val == VBE_DISPI_ID3 ||
649 val == VBE_DISPI_ID4) {
650 s->vbe_regs[s->vbe_index] = val;
651 }
652 break;
653 case VBE_DISPI_INDEX_XRES:
654 if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
655 s->vbe_regs[s->vbe_index] = val;
656 }
657 break;
658 case VBE_DISPI_INDEX_YRES:
659 if (val <= VBE_DISPI_MAX_YRES) {
660 s->vbe_regs[s->vbe_index] = val;
661 }
662 break;
663 case VBE_DISPI_INDEX_BPP:
664 if (val == 0)
665 val = 8;
666 if (val == 4 || val == 8 || val == 15 ||
667 val == 16 || val == 24 || val == 32) {
668 s->vbe_regs[s->vbe_index] = val;
669 }
670 break;
671 case VBE_DISPI_INDEX_BANK:
672 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
673 val &= (s->vbe_bank_mask >> 2);
674 } else {
675 val &= s->vbe_bank_mask;
676 }
677 s->vbe_regs[s->vbe_index] = val;
678 s->bank_offset = (val << 16);
679 vga_update_memory_access(s);
680 break;
681 case VBE_DISPI_INDEX_ENABLE:
682 if ((val & VBE_DISPI_ENABLED) &&
683 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
684 int h, shift_control;
685
686 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
687 s->vbe_regs[VBE_DISPI_INDEX_XRES];
688 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
689 s->vbe_regs[VBE_DISPI_INDEX_YRES];
690 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
691 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
692
693 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
694 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
695 else
696 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
697 ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
698 s->vbe_start_addr = 0;
699
700 /* clear the screen (should be done in BIOS) */
701 if (!(val & VBE_DISPI_NOCLEARMEM)) {
702 memset(s->vram_ptr, 0,
703 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
704 }
705
706 /* we initialize the VGA graphic mode (should be done
707 in BIOS) */
708 /* graphic mode + memory map 1 */
709 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
710 VGA_GR06_GRAPHICS_MODE;
711 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
712 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
713 /* width */
714 s->cr[VGA_CRTC_H_DISP] =
715 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
716 /* height (only meaningful if < 1024) */
717 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
718 s->cr[VGA_CRTC_V_DISP_END] = h;
719 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
720 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
721 /* line compare to 1023 */
722 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
723 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
724 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
725
726 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
727 shift_control = 0;
728 s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
729 } else {
730 shift_control = 2;
731 /* set chain 4 mode */
732 s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
733 /* activate all planes */
734 s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
735 }
736 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
737 (shift_control << 5);
738 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
739 } else {
740 /* XXX: the bios should do that */
741 s->bank_offset = 0;
742 }
743 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
744 s->vbe_regs[s->vbe_index] = val;
745 vga_update_memory_access(s);
746 break;
747 case VBE_DISPI_INDEX_VIRT_WIDTH:
748 {
749 int w, h, line_offset;
750
751 if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
752 return;
753 w = val;
754 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
755 line_offset = w >> 1;
756 else
757 line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
758 h = s->vram_size / line_offset;
759 /* XXX: support weird bochs semantics ? */
760 if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
761 return;
762 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
763 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
764 s->vbe_line_offset = line_offset;
765 }
766 break;
767 case VBE_DISPI_INDEX_X_OFFSET:
768 case VBE_DISPI_INDEX_Y_OFFSET:
769 {
770 int x;
771 s->vbe_regs[s->vbe_index] = val;
772 s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
773 x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
774 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
775 s->vbe_start_addr += x >> 1;
776 else
777 s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
778 s->vbe_start_addr >>= 2;
779 }
780 break;
781 default:
782 break;
783 }
784 }
785 }
786
787 /* called for accesses between 0xa0000 and 0xc0000 */
788 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
789 {
790 int memory_map_mode, plane;
791 uint32_t ret;
792
793 /* convert to VGA memory offset */
794 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
795 addr &= 0x1ffff;
796 switch(memory_map_mode) {
797 case 0:
798 break;
799 case 1:
800 if (addr >= 0x10000)
801 return 0xff;
802 addr += s->bank_offset;
803 break;
804 case 2:
805 addr -= 0x10000;
806 if (addr >= 0x8000)
807 return 0xff;
808 break;
809 default:
810 case 3:
811 addr -= 0x18000;
812 if (addr >= 0x8000)
813 return 0xff;
814 break;
815 }
816
817 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
818 /* chain 4 mode : simplest access */
819 ret = s->vram_ptr[addr];
820 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
821 /* odd/even mode (aka text mode mapping) */
822 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
823 ret = s->vram_ptr[((addr & ~1) << 1) | plane];
824 } else {
825 /* standard VGA latched access */
826 s->latch = ((uint32_t *)s->vram_ptr)[addr];
827
828 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
829 /* read mode 0 */
830 plane = s->gr[VGA_GFX_PLANE_READ];
831 ret = GET_PLANE(s->latch, plane);
832 } else {
833 /* read mode 1 */
834 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
835 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
836 ret |= ret >> 16;
837 ret |= ret >> 8;
838 ret = (~ret) & 0xff;
839 }
840 }
841 return ret;
842 }
843
844 /* called for accesses between 0xa0000 and 0xc0000 */
845 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
846 {
847 int memory_map_mode, plane, write_mode, b, func_select, mask;
848 uint32_t write_mask, bit_mask, set_mask;
849
850 #ifdef DEBUG_VGA_MEM
851 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
852 #endif
853 /* convert to VGA memory offset */
854 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
855 addr &= 0x1ffff;
856 switch(memory_map_mode) {
857 case 0:
858 break;
859 case 1:
860 if (addr >= 0x10000)
861 return;
862 addr += s->bank_offset;
863 break;
864 case 2:
865 addr -= 0x10000;
866 if (addr >= 0x8000)
867 return;
868 break;
869 default:
870 case 3:
871 addr -= 0x18000;
872 if (addr >= 0x8000)
873 return;
874 break;
875 }
876
877 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
878 /* chain 4 mode : simplest access */
879 plane = addr & 3;
880 mask = (1 << plane);
881 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
882 s->vram_ptr[addr] = val;
883 #ifdef DEBUG_VGA_MEM
884 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
885 #endif
886 s->plane_updated |= mask; /* only used to detect font change */
887 memory_region_set_dirty(&s->vram, addr, 1);
888 }
889 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
890 /* odd/even mode (aka text mode mapping) */
891 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
892 mask = (1 << plane);
893 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
894 addr = ((addr & ~1) << 1) | plane;
895 s->vram_ptr[addr] = val;
896 #ifdef DEBUG_VGA_MEM
897 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
898 #endif
899 s->plane_updated |= mask; /* only used to detect font change */
900 memory_region_set_dirty(&s->vram, addr, 1);
901 }
902 } else {
903 /* standard VGA latched access */
904 write_mode = s->gr[VGA_GFX_MODE] & 3;
905 switch(write_mode) {
906 default:
907 case 0:
908 /* rotate */
909 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
910 val = ((val >> b) | (val << (8 - b))) & 0xff;
911 val |= val << 8;
912 val |= val << 16;
913
914 /* apply set/reset mask */
915 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
916 val = (val & ~set_mask) |
917 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
918 bit_mask = s->gr[VGA_GFX_BIT_MASK];
919 break;
920 case 1:
921 val = s->latch;
922 goto do_write;
923 case 2:
924 val = mask16[val & 0x0f];
925 bit_mask = s->gr[VGA_GFX_BIT_MASK];
926 break;
927 case 3:
928 /* rotate */
929 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
930 val = (val >> b) | (val << (8 - b));
931
932 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
933 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
934 break;
935 }
936
937 /* apply logical operation */
938 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
939 switch(func_select) {
940 case 0:
941 default:
942 /* nothing to do */
943 break;
944 case 1:
945 /* and */
946 val &= s->latch;
947 break;
948 case 2:
949 /* or */
950 val |= s->latch;
951 break;
952 case 3:
953 /* xor */
954 val ^= s->latch;
955 break;
956 }
957
958 /* apply bit mask */
959 bit_mask |= bit_mask << 8;
960 bit_mask |= bit_mask << 16;
961 val = (val & bit_mask) | (s->latch & ~bit_mask);
962
963 do_write:
964 /* mask data according to sr[2] */
965 mask = s->sr[VGA_SEQ_PLANE_WRITE];
966 s->plane_updated |= mask; /* only used to detect font change */
967 write_mask = mask16[mask];
968 ((uint32_t *)s->vram_ptr)[addr] =
969 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
970 (val & write_mask);
971 #ifdef DEBUG_VGA_MEM
972 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
973 addr * 4, write_mask, val);
974 #endif
975 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
976 }
977 }
978
979 typedef void vga_draw_glyph8_func(uint8_t *d, int linesize,
980 const uint8_t *font_ptr, int h,
981 uint32_t fgcol, uint32_t bgcol);
982 typedef void vga_draw_glyph9_func(uint8_t *d, int linesize,
983 const uint8_t *font_ptr, int h,
984 uint32_t fgcol, uint32_t bgcol, int dup9);
985 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
986 const uint8_t *s, int width);
987
988 #define DEPTH 8
989 #include "hw/vga_template.h"
990
991 #define DEPTH 15
992 #include "hw/vga_template.h"
993
994 #define BGR_FORMAT
995 #define DEPTH 15
996 #include "hw/vga_template.h"
997
998 #define DEPTH 16
999 #include "hw/vga_template.h"
1000
1001 #define BGR_FORMAT
1002 #define DEPTH 16
1003 #include "hw/vga_template.h"
1004
1005 #define DEPTH 32
1006 #include "hw/vga_template.h"
1007
1008 #define BGR_FORMAT
1009 #define DEPTH 32
1010 #include "hw/vga_template.h"
1011
1012 static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b)
1013 {
1014 unsigned int col;
1015 col = rgb_to_pixel8(r, g, b);
1016 col |= col << 8;
1017 col |= col << 16;
1018 return col;
1019 }
1020
1021 static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b)
1022 {
1023 unsigned int col;
1024 col = rgb_to_pixel15(r, g, b);
1025 col |= col << 16;
1026 return col;
1027 }
1028
1029 static unsigned int rgb_to_pixel15bgr_dup(unsigned int r, unsigned int g,
1030 unsigned int b)
1031 {
1032 unsigned int col;
1033 col = rgb_to_pixel15bgr(r, g, b);
1034 col |= col << 16;
1035 return col;
1036 }
1037
1038 static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b)
1039 {
1040 unsigned int col;
1041 col = rgb_to_pixel16(r, g, b);
1042 col |= col << 16;
1043 return col;
1044 }
1045
1046 static unsigned int rgb_to_pixel16bgr_dup(unsigned int r, unsigned int g,
1047 unsigned int b)
1048 {
1049 unsigned int col;
1050 col = rgb_to_pixel16bgr(r, g, b);
1051 col |= col << 16;
1052 return col;
1053 }
1054
1055 static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b)
1056 {
1057 unsigned int col;
1058 col = rgb_to_pixel32(r, g, b);
1059 return col;
1060 }
1061
1062 static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
1063 {
1064 unsigned int col;
1065 col = rgb_to_pixel32bgr(r, g, b);
1066 return col;
1067 }
1068
1069 /* return true if the palette was modified */
1070 static int update_palette16(VGACommonState *s)
1071 {
1072 int full_update, i;
1073 uint32_t v, col, *palette;
1074
1075 full_update = 0;
1076 palette = s->last_palette;
1077 for(i = 0; i < 16; i++) {
1078 v = s->ar[i];
1079 if (s->ar[VGA_ATC_MODE] & 0x80) {
1080 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1081 } else {
1082 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1083 }
1084 v = v * 3;
1085 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1086 c6_to_8(s->palette[v + 1]),
1087 c6_to_8(s->palette[v + 2]));
1088 if (col != palette[i]) {
1089 full_update = 1;
1090 palette[i] = col;
1091 }
1092 }
1093 return full_update;
1094 }
1095
1096 /* return true if the palette was modified */
1097 static int update_palette256(VGACommonState *s)
1098 {
1099 int full_update, i;
1100 uint32_t v, col, *palette;
1101
1102 full_update = 0;
1103 palette = s->last_palette;
1104 v = 0;
1105 for(i = 0; i < 256; i++) {
1106 if (s->dac_8bit) {
1107 col = s->rgb_to_pixel(s->palette[v],
1108 s->palette[v + 1],
1109 s->palette[v + 2]);
1110 } else {
1111 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1112 c6_to_8(s->palette[v + 1]),
1113 c6_to_8(s->palette[v + 2]));
1114 }
1115 if (col != palette[i]) {
1116 full_update = 1;
1117 palette[i] = col;
1118 }
1119 v += 3;
1120 }
1121 return full_update;
1122 }
1123
1124 static void vga_get_offsets(VGACommonState *s,
1125 uint32_t *pline_offset,
1126 uint32_t *pstart_addr,
1127 uint32_t *pline_compare)
1128 {
1129 uint32_t start_addr, line_offset, line_compare;
1130
1131 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1132 line_offset = s->vbe_line_offset;
1133 start_addr = s->vbe_start_addr;
1134 line_compare = 65535;
1135 } else {
1136 /* compute line_offset in bytes */
1137 line_offset = s->cr[VGA_CRTC_OFFSET];
1138 line_offset <<= 3;
1139
1140 /* starting address */
1141 start_addr = s->cr[VGA_CRTC_START_LO] |
1142 (s->cr[VGA_CRTC_START_HI] << 8);
1143
1144 /* line compare */
1145 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1146 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1147 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1148 }
1149 *pline_offset = line_offset;
1150 *pstart_addr = start_addr;
1151 *pline_compare = line_compare;
1152 }
1153
1154 /* update start_addr and line_offset. Return TRUE if modified */
1155 static int update_basic_params(VGACommonState *s)
1156 {
1157 int full_update;
1158 uint32_t start_addr, line_offset, line_compare;
1159
1160 full_update = 0;
1161
1162 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1163
1164 if (line_offset != s->line_offset ||
1165 start_addr != s->start_addr ||
1166 line_compare != s->line_compare) {
1167 s->line_offset = line_offset;
1168 s->start_addr = start_addr;
1169 s->line_compare = line_compare;
1170 full_update = 1;
1171 }
1172 return full_update;
1173 }
1174
1175 #define NB_DEPTHS 7
1176
1177 static inline int get_depth_index(DisplaySurface *s)
1178 {
1179 switch (surface_bits_per_pixel(s)) {
1180 default:
1181 case 8:
1182 return 0;
1183 case 15:
1184 return 1;
1185 case 16:
1186 return 2;
1187 case 32:
1188 if (is_surface_bgr(s)) {
1189 return 4;
1190 } else {
1191 return 3;
1192 }
1193 }
1194 }
1195
1196 static vga_draw_glyph8_func * const vga_draw_glyph8_table[NB_DEPTHS] = {
1197 vga_draw_glyph8_8,
1198 vga_draw_glyph8_16,
1199 vga_draw_glyph8_16,
1200 vga_draw_glyph8_32,
1201 vga_draw_glyph8_32,
1202 vga_draw_glyph8_16,
1203 vga_draw_glyph8_16,
1204 };
1205
1206 static vga_draw_glyph8_func * const vga_draw_glyph16_table[NB_DEPTHS] = {
1207 vga_draw_glyph16_8,
1208 vga_draw_glyph16_16,
1209 vga_draw_glyph16_16,
1210 vga_draw_glyph16_32,
1211 vga_draw_glyph16_32,
1212 vga_draw_glyph16_16,
1213 vga_draw_glyph16_16,
1214 };
1215
1216 static vga_draw_glyph9_func * const vga_draw_glyph9_table[NB_DEPTHS] = {
1217 vga_draw_glyph9_8,
1218 vga_draw_glyph9_16,
1219 vga_draw_glyph9_16,
1220 vga_draw_glyph9_32,
1221 vga_draw_glyph9_32,
1222 vga_draw_glyph9_16,
1223 vga_draw_glyph9_16,
1224 };
1225
1226 static const uint8_t cursor_glyph[32 * 4] = {
1227 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1228 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1229 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1230 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1231 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1232 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1233 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1234 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1235 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1236 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1237 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1238 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1239 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1240 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1241 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1242 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1243 };
1244
1245 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1246 int *pcwidth, int *pcheight)
1247 {
1248 int width, cwidth, height, cheight;
1249
1250 /* total width & height */
1251 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1252 cwidth = 8;
1253 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
1254 cwidth = 9;
1255 }
1256 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
1257 cwidth = 16; /* NOTE: no 18 pixel wide */
1258 }
1259 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1260 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1261 /* ugly hack for CGA 160x100x16 - explain me the logic */
1262 height = 100;
1263 } else {
1264 height = s->cr[VGA_CRTC_V_DISP_END] |
1265 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1266 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1267 height = (height + 1) / cheight;
1268 }
1269
1270 *pwidth = width;
1271 *pheight = height;
1272 *pcwidth = cwidth;
1273 *pcheight = cheight;
1274 }
1275
1276 typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
1277
1278 static rgb_to_pixel_dup_func * const rgb_to_pixel_dup_table[NB_DEPTHS] = {
1279 rgb_to_pixel8_dup,
1280 rgb_to_pixel15_dup,
1281 rgb_to_pixel16_dup,
1282 rgb_to_pixel32_dup,
1283 rgb_to_pixel32bgr_dup,
1284 rgb_to_pixel15bgr_dup,
1285 rgb_to_pixel16bgr_dup,
1286 };
1287
1288 /*
1289 * Text mode update
1290 * Missing:
1291 * - double scan
1292 * - double width
1293 * - underline
1294 * - flashing
1295 */
1296 static void vga_draw_text(VGACommonState *s, int full_update)
1297 {
1298 DisplaySurface *surface = qemu_console_surface(s->con);
1299 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1300 int cx_min, cx_max, linesize, x_incr, line, line1;
1301 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1302 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1303 const uint8_t *font_ptr, *font_base[2];
1304 int dup9, line_offset, depth_index;
1305 uint32_t *palette;
1306 uint32_t *ch_attr_ptr;
1307 vga_draw_glyph8_func *vga_draw_glyph8;
1308 vga_draw_glyph9_func *vga_draw_glyph9;
1309 int64_t now = qemu_get_clock_ms(vm_clock);
1310
1311 /* compute font data address (in plane 2) */
1312 v = s->sr[VGA_SEQ_CHARACTER_MAP];
1313 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1314 if (offset != s->font_offsets[0]) {
1315 s->font_offsets[0] = offset;
1316 full_update = 1;
1317 }
1318 font_base[0] = s->vram_ptr + offset;
1319
1320 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1321 font_base[1] = s->vram_ptr + offset;
1322 if (offset != s->font_offsets[1]) {
1323 s->font_offsets[1] = offset;
1324 full_update = 1;
1325 }
1326 if (s->plane_updated & (1 << 2) || s->chain4_alias) {
1327 /* if the plane 2 was modified since the last display, it
1328 indicates the font may have been modified */
1329 s->plane_updated = 0;
1330 full_update = 1;
1331 }
1332 full_update |= update_basic_params(s);
1333
1334 line_offset = s->line_offset;
1335
1336 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1337 if ((height * width) <= 1) {
1338 /* better than nothing: exit if transient size is too small */
1339 return;
1340 }
1341 if ((height * width) > CH_ATTR_SIZE) {
1342 /* better than nothing: exit if transient size is too big */
1343 return;
1344 }
1345
1346 if (width != s->last_width || height != s->last_height ||
1347 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1348 s->last_scr_width = width * cw;
1349 s->last_scr_height = height * cheight;
1350 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1351 surface = qemu_console_surface(s->con);
1352 dpy_text_resize(s->con, width, height);
1353 s->last_depth = 0;
1354 s->last_width = width;
1355 s->last_height = height;
1356 s->last_ch = cheight;
1357 s->last_cw = cw;
1358 full_update = 1;
1359 }
1360 s->rgb_to_pixel =
1361 rgb_to_pixel_dup_table[get_depth_index(surface)];
1362 full_update |= update_palette16(s);
1363 palette = s->last_palette;
1364 x_incr = cw * surface_bytes_per_pixel(surface);
1365
1366 if (full_update) {
1367 s->full_update_text = 1;
1368 }
1369 if (s->full_update_gfx) {
1370 s->full_update_gfx = 0;
1371 full_update |= 1;
1372 }
1373
1374 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1375 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1376 if (cursor_offset != s->cursor_offset ||
1377 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1378 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1379 /* if the cursor position changed, we update the old and new
1380 chars */
1381 if (s->cursor_offset < CH_ATTR_SIZE)
1382 s->last_ch_attr[s->cursor_offset] = -1;
1383 if (cursor_offset < CH_ATTR_SIZE)
1384 s->last_ch_attr[cursor_offset] = -1;
1385 s->cursor_offset = cursor_offset;
1386 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1387 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1388 }
1389 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1390 if (now >= s->cursor_blink_time) {
1391 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1392 s->cursor_visible_phase = !s->cursor_visible_phase;
1393 }
1394
1395 depth_index = get_depth_index(surface);
1396 if (cw == 16)
1397 vga_draw_glyph8 = vga_draw_glyph16_table[depth_index];
1398 else
1399 vga_draw_glyph8 = vga_draw_glyph8_table[depth_index];
1400 vga_draw_glyph9 = vga_draw_glyph9_table[depth_index];
1401
1402 dest = surface_data(surface);
1403 linesize = surface_stride(surface);
1404 ch_attr_ptr = s->last_ch_attr;
1405 line = 0;
1406 offset = s->start_addr * 4;
1407 for(cy = 0; cy < height; cy++) {
1408 d1 = dest;
1409 src = s->vram_ptr + offset;
1410 cx_min = width;
1411 cx_max = -1;
1412 for(cx = 0; cx < width; cx++) {
1413 ch_attr = *(uint16_t *)src;
1414 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1415 if (cx < cx_min)
1416 cx_min = cx;
1417 if (cx > cx_max)
1418 cx_max = cx;
1419 *ch_attr_ptr = ch_attr;
1420 #ifdef HOST_WORDS_BIGENDIAN
1421 ch = ch_attr >> 8;
1422 cattr = ch_attr & 0xff;
1423 #else
1424 ch = ch_attr & 0xff;
1425 cattr = ch_attr >> 8;
1426 #endif
1427 font_ptr = font_base[(cattr >> 3) & 1];
1428 font_ptr += 32 * 4 * ch;
1429 bgcol = palette[cattr >> 4];
1430 fgcol = palette[cattr & 0x0f];
1431 if (cw != 9) {
1432 vga_draw_glyph8(d1, linesize,
1433 font_ptr, cheight, fgcol, bgcol);
1434 } else {
1435 dup9 = 0;
1436 if (ch >= 0xb0 && ch <= 0xdf &&
1437 (s->ar[VGA_ATC_MODE] & 0x04)) {
1438 dup9 = 1;
1439 }
1440 vga_draw_glyph9(d1, linesize,
1441 font_ptr, cheight, fgcol, bgcol, dup9);
1442 }
1443 if (src == cursor_ptr &&
1444 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1445 s->cursor_visible_phase) {
1446 int line_start, line_last, h;
1447 /* draw the cursor */
1448 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1449 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1450 /* XXX: check that */
1451 if (line_last > cheight - 1)
1452 line_last = cheight - 1;
1453 if (line_last >= line_start && line_start < cheight) {
1454 h = line_last - line_start + 1;
1455 d = d1 + linesize * line_start;
1456 if (cw != 9) {
1457 vga_draw_glyph8(d, linesize,
1458 cursor_glyph, h, fgcol, bgcol);
1459 } else {
1460 vga_draw_glyph9(d, linesize,
1461 cursor_glyph, h, fgcol, bgcol, 1);
1462 }
1463 }
1464 }
1465 }
1466 d1 += x_incr;
1467 src += 4;
1468 ch_attr_ptr++;
1469 }
1470 if (cx_max != -1) {
1471 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1472 (cx_max - cx_min + 1) * cw, cheight);
1473 }
1474 dest += linesize * cheight;
1475 line1 = line + cheight;
1476 offset += line_offset;
1477 if (line < s->line_compare && line1 >= s->line_compare) {
1478 offset = 0;
1479 }
1480 line = line1;
1481 }
1482 }
1483
1484 enum {
1485 VGA_DRAW_LINE2,
1486 VGA_DRAW_LINE2D2,
1487 VGA_DRAW_LINE4,
1488 VGA_DRAW_LINE4D2,
1489 VGA_DRAW_LINE8D2,
1490 VGA_DRAW_LINE8,
1491 VGA_DRAW_LINE15,
1492 VGA_DRAW_LINE16,
1493 VGA_DRAW_LINE24,
1494 VGA_DRAW_LINE32,
1495 VGA_DRAW_LINE_NB,
1496 };
1497
1498 static vga_draw_line_func * const vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
1499 vga_draw_line2_8,
1500 vga_draw_line2_16,
1501 vga_draw_line2_16,
1502 vga_draw_line2_32,
1503 vga_draw_line2_32,
1504 vga_draw_line2_16,
1505 vga_draw_line2_16,
1506
1507 vga_draw_line2d2_8,
1508 vga_draw_line2d2_16,
1509 vga_draw_line2d2_16,
1510 vga_draw_line2d2_32,
1511 vga_draw_line2d2_32,
1512 vga_draw_line2d2_16,
1513 vga_draw_line2d2_16,
1514
1515 vga_draw_line4_8,
1516 vga_draw_line4_16,
1517 vga_draw_line4_16,
1518 vga_draw_line4_32,
1519 vga_draw_line4_32,
1520 vga_draw_line4_16,
1521 vga_draw_line4_16,
1522
1523 vga_draw_line4d2_8,
1524 vga_draw_line4d2_16,
1525 vga_draw_line4d2_16,
1526 vga_draw_line4d2_32,
1527 vga_draw_line4d2_32,
1528 vga_draw_line4d2_16,
1529 vga_draw_line4d2_16,
1530
1531 vga_draw_line8d2_8,
1532 vga_draw_line8d2_16,
1533 vga_draw_line8d2_16,
1534 vga_draw_line8d2_32,
1535 vga_draw_line8d2_32,
1536 vga_draw_line8d2_16,
1537 vga_draw_line8d2_16,
1538
1539 vga_draw_line8_8,
1540 vga_draw_line8_16,
1541 vga_draw_line8_16,
1542 vga_draw_line8_32,
1543 vga_draw_line8_32,
1544 vga_draw_line8_16,
1545 vga_draw_line8_16,
1546
1547 vga_draw_line15_8,
1548 vga_draw_line15_15,
1549 vga_draw_line15_16,
1550 vga_draw_line15_32,
1551 vga_draw_line15_32bgr,
1552 vga_draw_line15_15bgr,
1553 vga_draw_line15_16bgr,
1554
1555 vga_draw_line16_8,
1556 vga_draw_line16_15,
1557 vga_draw_line16_16,
1558 vga_draw_line16_32,
1559 vga_draw_line16_32bgr,
1560 vga_draw_line16_15bgr,
1561 vga_draw_line16_16bgr,
1562
1563 vga_draw_line24_8,
1564 vga_draw_line24_15,
1565 vga_draw_line24_16,
1566 vga_draw_line24_32,
1567 vga_draw_line24_32bgr,
1568 vga_draw_line24_15bgr,
1569 vga_draw_line24_16bgr,
1570
1571 vga_draw_line32_8,
1572 vga_draw_line32_15,
1573 vga_draw_line32_16,
1574 vga_draw_line32_32,
1575 vga_draw_line32_32bgr,
1576 vga_draw_line32_15bgr,
1577 vga_draw_line32_16bgr,
1578 };
1579
1580 static int vga_get_bpp(VGACommonState *s)
1581 {
1582 int ret;
1583
1584 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1585 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1586 } else {
1587 ret = 0;
1588 }
1589 return ret;
1590 }
1591
1592 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1593 {
1594 int width, height;
1595
1596 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1597 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1598 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1599 } else {
1600 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1601 height = s->cr[VGA_CRTC_V_DISP_END] |
1602 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1603 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1604 height = (height + 1);
1605 }
1606 *pwidth = width;
1607 *pheight = height;
1608 }
1609
1610 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1611 {
1612 int y;
1613 if (y1 >= VGA_MAX_HEIGHT)
1614 return;
1615 if (y2 >= VGA_MAX_HEIGHT)
1616 y2 = VGA_MAX_HEIGHT;
1617 for(y = y1; y < y2; y++) {
1618 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1619 }
1620 }
1621
1622 void vga_sync_dirty_bitmap(VGACommonState *s)
1623 {
1624 memory_region_sync_dirty_bitmap(&s->vram);
1625 }
1626
1627 void vga_dirty_log_start(VGACommonState *s)
1628 {
1629 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1630 }
1631
1632 void vga_dirty_log_stop(VGACommonState *s)
1633 {
1634 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1635 }
1636
1637 /*
1638 * graphic modes
1639 */
1640 static void vga_draw_graphic(VGACommonState *s, int full_update)
1641 {
1642 DisplaySurface *surface = qemu_console_surface(s->con);
1643 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1644 int width, height, shift_control, line_offset, bwidth, bits;
1645 ram_addr_t page0, page1, page_min, page_max;
1646 int disp_width, multi_scan, multi_run;
1647 uint8_t *d;
1648 uint32_t v, addr1, addr;
1649 vga_draw_line_func *vga_draw_line;
1650 #if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
1651 static const bool byteswap = false;
1652 #else
1653 static const bool byteswap = true;
1654 #endif
1655
1656 full_update |= update_basic_params(s);
1657
1658 if (!full_update)
1659 vga_sync_dirty_bitmap(s);
1660
1661 s->get_resolution(s, &width, &height);
1662 disp_width = width;
1663
1664 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1665 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1666 if (shift_control != 1) {
1667 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1668 - 1;
1669 } else {
1670 /* in CGA modes, multi_scan is ignored */
1671 /* XXX: is it correct ? */
1672 multi_scan = double_scan;
1673 }
1674 multi_run = multi_scan;
1675 if (shift_control != s->shift_control ||
1676 double_scan != s->double_scan) {
1677 full_update = 1;
1678 s->shift_control = shift_control;
1679 s->double_scan = double_scan;
1680 }
1681
1682 if (shift_control == 0) {
1683 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1684 disp_width <<= 1;
1685 }
1686 } else if (shift_control == 1) {
1687 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1688 disp_width <<= 1;
1689 }
1690 }
1691
1692 depth = s->get_bpp(s);
1693 if (s->line_offset != s->last_line_offset ||
1694 disp_width != s->last_width ||
1695 height != s->last_height ||
1696 s->last_depth != depth) {
1697 if (depth == 32 || (depth == 16 && !byteswap)) {
1698 surface = qemu_create_displaysurface_from(disp_width,
1699 height, depth, s->line_offset,
1700 s->vram_ptr + (s->start_addr * 4), byteswap);
1701 dpy_gfx_replace_surface(s->con, surface);
1702 } else {
1703 qemu_console_resize(s->con, disp_width, height);
1704 surface = qemu_console_surface(s->con);
1705 }
1706 s->last_scr_width = disp_width;
1707 s->last_scr_height = height;
1708 s->last_width = disp_width;
1709 s->last_height = height;
1710 s->last_line_offset = s->line_offset;
1711 s->last_depth = depth;
1712 full_update = 1;
1713 } else if (is_buffer_shared(surface) &&
1714 (full_update || surface_data(surface) != s->vram_ptr
1715 + (s->start_addr * 4))) {
1716 DisplaySurface *surface;
1717 surface = qemu_create_displaysurface_from(disp_width,
1718 height, depth, s->line_offset,
1719 s->vram_ptr + (s->start_addr * 4), byteswap);
1720 dpy_gfx_replace_surface(s->con, surface);
1721 }
1722
1723 s->rgb_to_pixel =
1724 rgb_to_pixel_dup_table[get_depth_index(surface)];
1725
1726 if (shift_control == 0) {
1727 full_update |= update_palette16(s);
1728 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1729 v = VGA_DRAW_LINE4D2;
1730 } else {
1731 v = VGA_DRAW_LINE4;
1732 }
1733 bits = 4;
1734 } else if (shift_control == 1) {
1735 full_update |= update_palette16(s);
1736 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1737 v = VGA_DRAW_LINE2D2;
1738 } else {
1739 v = VGA_DRAW_LINE2;
1740 }
1741 bits = 4;
1742 } else {
1743 switch(s->get_bpp(s)) {
1744 default:
1745 case 0:
1746 full_update |= update_palette256(s);
1747 v = VGA_DRAW_LINE8D2;
1748 bits = 4;
1749 break;
1750 case 8:
1751 full_update |= update_palette256(s);
1752 v = VGA_DRAW_LINE8;
1753 bits = 8;
1754 break;
1755 case 15:
1756 v = VGA_DRAW_LINE15;
1757 bits = 16;
1758 break;
1759 case 16:
1760 v = VGA_DRAW_LINE16;
1761 bits = 16;
1762 break;
1763 case 24:
1764 v = VGA_DRAW_LINE24;
1765 bits = 24;
1766 break;
1767 case 32:
1768 v = VGA_DRAW_LINE32;
1769 bits = 32;
1770 break;
1771 }
1772 }
1773 vga_draw_line = vga_draw_line_table[v * NB_DEPTHS +
1774 get_depth_index(surface)];
1775
1776 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1777 s->cursor_invalidate(s);
1778 }
1779
1780 line_offset = s->line_offset;
1781 #if 0
1782 printf("w=%d h=%d v=%d line_offset=%d cr[0x09]=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=0x%02x\n",
1783 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1784 s->line_compare, s->sr[VGA_SEQ_CLOCK_MODE]);
1785 #endif
1786 addr1 = (s->start_addr * 4);
1787 bwidth = (width * bits + 7) / 8;
1788 y_start = -1;
1789 page_min = -1;
1790 page_max = 0;
1791 d = surface_data(surface);
1792 linesize = surface_stride(surface);
1793 y1 = 0;
1794 for(y = 0; y < height; y++) {
1795 addr = addr1;
1796 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1797 int shift;
1798 /* CGA compatibility handling */
1799 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1800 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1801 }
1802 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1803 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1804 }
1805 update = full_update;
1806 page0 = addr;
1807 page1 = addr + bwidth - 1;
1808 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
1809 DIRTY_MEMORY_VGA);
1810 /* explicit invalidation for the hardware cursor */
1811 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1812 if (update) {
1813 if (y_start < 0)
1814 y_start = y;
1815 if (page0 < page_min)
1816 page_min = page0;
1817 if (page1 > page_max)
1818 page_max = page1;
1819 if (!(is_buffer_shared(surface))) {
1820 vga_draw_line(s, d, s->vram_ptr + addr, width);
1821 if (s->cursor_draw_line)
1822 s->cursor_draw_line(s, d, y);
1823 }
1824 } else {
1825 if (y_start >= 0) {
1826 /* flush to display */
1827 dpy_gfx_update(s->con, 0, y_start,
1828 disp_width, y - y_start);
1829 y_start = -1;
1830 }
1831 }
1832 if (!multi_run) {
1833 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1834 if ((y1 & mask) == mask)
1835 addr1 += line_offset;
1836 y1++;
1837 multi_run = multi_scan;
1838 } else {
1839 multi_run--;
1840 }
1841 /* line compare acts on the displayed lines */
1842 if (y == s->line_compare)
1843 addr1 = 0;
1844 d += linesize;
1845 }
1846 if (y_start >= 0) {
1847 /* flush to display */
1848 dpy_gfx_update(s->con, 0, y_start,
1849 disp_width, y - y_start);
1850 }
1851 /* reset modified pages */
1852 if (page_max >= page_min) {
1853 memory_region_reset_dirty(&s->vram,
1854 page_min,
1855 page_max - page_min,
1856 DIRTY_MEMORY_VGA);
1857 }
1858 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1859 }
1860
1861 static void vga_draw_blank(VGACommonState *s, int full_update)
1862 {
1863 DisplaySurface *surface = qemu_console_surface(s->con);
1864 int i, w, val;
1865 uint8_t *d;
1866
1867 if (!full_update)
1868 return;
1869 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1870 return;
1871
1872 s->rgb_to_pixel =
1873 rgb_to_pixel_dup_table[get_depth_index(surface)];
1874 if (surface_bits_per_pixel(surface) == 8) {
1875 val = s->rgb_to_pixel(0, 0, 0);
1876 } else {
1877 val = 0;
1878 }
1879 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1880 d = surface_data(surface);
1881 for(i = 0; i < s->last_scr_height; i++) {
1882 memset(d, val, w);
1883 d += surface_stride(surface);
1884 }
1885 dpy_gfx_update(s->con, 0, 0,
1886 s->last_scr_width, s->last_scr_height);
1887 }
1888
1889 #define GMODE_TEXT 0
1890 #define GMODE_GRAPH 1
1891 #define GMODE_BLANK 2
1892
1893 static void vga_update_display(void *opaque)
1894 {
1895 VGACommonState *s = opaque;
1896 DisplaySurface *surface = qemu_console_surface(s->con);
1897 int full_update, graphic_mode;
1898
1899 qemu_flush_coalesced_mmio_buffer();
1900
1901 if (surface_bits_per_pixel(surface) == 0) {
1902 /* nothing to do */
1903 } else {
1904 full_update = 0;
1905 if (!(s->ar_index & 0x20)) {
1906 graphic_mode = GMODE_BLANK;
1907 } else {
1908 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1909 }
1910 if (graphic_mode != s->graphic_mode) {
1911 s->graphic_mode = graphic_mode;
1912 s->cursor_blink_time = qemu_get_clock_ms(vm_clock);
1913 full_update = 1;
1914 }
1915 switch(graphic_mode) {
1916 case GMODE_TEXT:
1917 vga_draw_text(s, full_update);
1918 break;
1919 case GMODE_GRAPH:
1920 vga_draw_graphic(s, full_update);
1921 break;
1922 case GMODE_BLANK:
1923 default:
1924 vga_draw_blank(s, full_update);
1925 break;
1926 }
1927 }
1928 }
1929
1930 /* force a full display refresh */
1931 static void vga_invalidate_display(void *opaque)
1932 {
1933 VGACommonState *s = opaque;
1934
1935 s->last_width = -1;
1936 s->last_height = -1;
1937 }
1938
1939 void vga_common_reset(VGACommonState *s)
1940 {
1941 s->sr_index = 0;
1942 memset(s->sr, '\0', sizeof(s->sr));
1943 s->gr_index = 0;
1944 memset(s->gr, '\0', sizeof(s->gr));
1945 s->ar_index = 0;
1946 memset(s->ar, '\0', sizeof(s->ar));
1947 s->ar_flip_flop = 0;
1948 s->cr_index = 0;
1949 memset(s->cr, '\0', sizeof(s->cr));
1950 s->msr = 0;
1951 s->fcr = 0;
1952 s->st00 = 0;
1953 s->st01 = 0;
1954 s->dac_state = 0;
1955 s->dac_sub_index = 0;
1956 s->dac_read_index = 0;
1957 s->dac_write_index = 0;
1958 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1959 s->dac_8bit = 0;
1960 memset(s->palette, '\0', sizeof(s->palette));
1961 s->bank_offset = 0;
1962 s->vbe_index = 0;
1963 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1964 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1965 s->vbe_start_addr = 0;
1966 s->vbe_line_offset = 0;
1967 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1968 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1969 s->graphic_mode = -1; /* force full update */
1970 s->shift_control = 0;
1971 s->double_scan = 0;
1972 s->line_offset = 0;
1973 s->line_compare = 0;
1974 s->start_addr = 0;
1975 s->plane_updated = 0;
1976 s->last_cw = 0;
1977 s->last_ch = 0;
1978 s->last_width = 0;
1979 s->last_height = 0;
1980 s->last_scr_width = 0;
1981 s->last_scr_height = 0;
1982 s->cursor_start = 0;
1983 s->cursor_end = 0;
1984 s->cursor_offset = 0;
1985 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1986 memset(s->last_palette, '\0', sizeof(s->last_palette));
1987 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1988 switch (vga_retrace_method) {
1989 case VGA_RETRACE_DUMB:
1990 break;
1991 case VGA_RETRACE_PRECISE:
1992 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1993 break;
1994 }
1995 vga_update_memory_access(s);
1996 }
1997
1998 static void vga_reset(void *opaque)
1999 {
2000 VGACommonState *s = opaque;
2001 vga_common_reset(s);
2002 }
2003
2004 #define TEXTMODE_X(x) ((x) % width)
2005 #define TEXTMODE_Y(x) ((x) / width)
2006 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
2007 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
2008 /* relay text rendering to the display driver
2009 * instead of doing a full vga_update_display() */
2010 static void vga_update_text(void *opaque, console_ch_t *chardata)
2011 {
2012 VGACommonState *s = opaque;
2013 int graphic_mode, i, cursor_offset, cursor_visible;
2014 int cw, cheight, width, height, size, c_min, c_max;
2015 uint32_t *src;
2016 console_ch_t *dst, val;
2017 char msg_buffer[80];
2018 int full_update = 0;
2019
2020 qemu_flush_coalesced_mmio_buffer();
2021
2022 if (!(s->ar_index & 0x20)) {
2023 graphic_mode = GMODE_BLANK;
2024 } else {
2025 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
2026 }
2027 if (graphic_mode != s->graphic_mode) {
2028 s->graphic_mode = graphic_mode;
2029 full_update = 1;
2030 }
2031 if (s->last_width == -1) {
2032 s->last_width = 0;
2033 full_update = 1;
2034 }
2035
2036 switch (graphic_mode) {
2037 case GMODE_TEXT:
2038 /* TODO: update palette */
2039 full_update |= update_basic_params(s);
2040
2041 /* total width & height */
2042 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
2043 cw = 8;
2044 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
2045 cw = 9;
2046 }
2047 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
2048 cw = 16; /* NOTE: no 18 pixel wide */
2049 }
2050 width = (s->cr[VGA_CRTC_H_DISP] + 1);
2051 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
2052 /* ugly hack for CGA 160x100x16 - explain me the logic */
2053 height = 100;
2054 } else {
2055 height = s->cr[VGA_CRTC_V_DISP_END] |
2056 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
2057 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
2058 height = (height + 1) / cheight;
2059 }
2060
2061 size = (height * width);
2062 if (size > CH_ATTR_SIZE) {
2063 if (!full_update)
2064 return;
2065
2066 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
2067 width, height);
2068 break;
2069 }
2070
2071 if (width != s->last_width || height != s->last_height ||
2072 cw != s->last_cw || cheight != s->last_ch) {
2073 s->last_scr_width = width * cw;
2074 s->last_scr_height = height * cheight;
2075 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
2076 dpy_text_resize(s->con, width, height);
2077 s->last_depth = 0;
2078 s->last_width = width;
2079 s->last_height = height;
2080 s->last_ch = cheight;
2081 s->last_cw = cw;
2082 full_update = 1;
2083 }
2084
2085 if (full_update) {
2086 s->full_update_gfx = 1;
2087 }
2088 if (s->full_update_text) {
2089 s->full_update_text = 0;
2090 full_update |= 1;
2091 }
2092
2093 /* Update "hardware" cursor */
2094 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
2095 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
2096 if (cursor_offset != s->cursor_offset ||
2097 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
2098 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
2099 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
2100 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
2101 dpy_text_cursor(s->con,
2102 TEXTMODE_X(cursor_offset),
2103 TEXTMODE_Y(cursor_offset));
2104 else
2105 dpy_text_cursor(s->con, -1, -1);
2106 s->cursor_offset = cursor_offset;
2107 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
2108 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
2109 }
2110
2111 src = (uint32_t *) s->vram_ptr + s->start_addr;
2112 dst = chardata;
2113
2114 if (full_update) {
2115 for (i = 0; i < size; src ++, dst ++, i ++)
2116 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
2117
2118 dpy_text_update(s->con, 0, 0, width, height);
2119 } else {
2120 c_max = 0;
2121
2122 for (i = 0; i < size; src ++, dst ++, i ++) {
2123 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2124 if (*dst != val) {
2125 *dst = val;
2126 c_max = i;
2127 break;
2128 }
2129 }
2130 c_min = i;
2131 for (; i < size; src ++, dst ++, i ++) {
2132 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2133 if (*dst != val) {
2134 *dst = val;
2135 c_max = i;
2136 }
2137 }
2138
2139 if (c_min <= c_max) {
2140 i = TEXTMODE_Y(c_min);
2141 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2142 }
2143 }
2144
2145 return;
2146 case GMODE_GRAPH:
2147 if (!full_update)
2148 return;
2149
2150 s->get_resolution(s, &width, &height);
2151 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2152 width, height);
2153 break;
2154 case GMODE_BLANK:
2155 default:
2156 if (!full_update)
2157 return;
2158
2159 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2160 break;
2161 }
2162
2163 /* Display a message */
2164 s->last_width = 60;
2165 s->last_height = height = 3;
2166 dpy_text_cursor(s->con, -1, -1);
2167 dpy_text_resize(s->con, s->last_width, height);
2168
2169 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2170 console_write_ch(dst ++, ' ');
2171
2172 size = strlen(msg_buffer);
2173 width = (s->last_width - size) / 2;
2174 dst = chardata + s->last_width + width;
2175 for (i = 0; i < size; i ++)
2176 console_write_ch(dst ++, 0x00200100 | msg_buffer[i]);
2177
2178 dpy_text_update(s->con, 0, 0, s->last_width, height);
2179 }
2180
2181 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2182 unsigned size)
2183 {
2184 VGACommonState *s = opaque;
2185
2186 return vga_mem_readb(s, addr);
2187 }
2188
2189 static void vga_mem_write(void *opaque, hwaddr addr,
2190 uint64_t data, unsigned size)
2191 {
2192 VGACommonState *s = opaque;
2193
2194 return vga_mem_writeb(s, addr, data);
2195 }
2196
2197 const MemoryRegionOps vga_mem_ops = {
2198 .read = vga_mem_read,
2199 .write = vga_mem_write,
2200 .endianness = DEVICE_LITTLE_ENDIAN,
2201 .impl = {
2202 .min_access_size = 1,
2203 .max_access_size = 1,
2204 },
2205 };
2206
2207 static int vga_common_post_load(void *opaque, int version_id)
2208 {
2209 VGACommonState *s = opaque;
2210
2211 /* force refresh */
2212 s->graphic_mode = -1;
2213 return 0;
2214 }
2215
2216 const VMStateDescription vmstate_vga_common = {
2217 .name = "vga",
2218 .version_id = 2,
2219 .minimum_version_id = 2,
2220 .minimum_version_id_old = 2,
2221 .post_load = vga_common_post_load,
2222 .fields = (VMStateField []) {
2223 VMSTATE_UINT32(latch, VGACommonState),
2224 VMSTATE_UINT8(sr_index, VGACommonState),
2225 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2226 VMSTATE_UINT8(gr_index, VGACommonState),
2227 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2228 VMSTATE_UINT8(ar_index, VGACommonState),
2229 VMSTATE_BUFFER(ar, VGACommonState),
2230 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2231 VMSTATE_UINT8(cr_index, VGACommonState),
2232 VMSTATE_BUFFER(cr, VGACommonState),
2233 VMSTATE_UINT8(msr, VGACommonState),
2234 VMSTATE_UINT8(fcr, VGACommonState),
2235 VMSTATE_UINT8(st00, VGACommonState),
2236 VMSTATE_UINT8(st01, VGACommonState),
2237
2238 VMSTATE_UINT8(dac_state, VGACommonState),
2239 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2240 VMSTATE_UINT8(dac_read_index, VGACommonState),
2241 VMSTATE_UINT8(dac_write_index, VGACommonState),
2242 VMSTATE_BUFFER(dac_cache, VGACommonState),
2243 VMSTATE_BUFFER(palette, VGACommonState),
2244
2245 VMSTATE_INT32(bank_offset, VGACommonState),
2246 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2247 VMSTATE_UINT16(vbe_index, VGACommonState),
2248 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2249 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2250 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2251 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2252 VMSTATE_END_OF_LIST()
2253 }
2254 };
2255
2256 void vga_common_init(VGACommonState *s)
2257 {
2258 int i, j, v, b;
2259
2260 for(i = 0;i < 256; i++) {
2261 v = 0;
2262 for(j = 0; j < 8; j++) {
2263 v |= ((i >> j) & 1) << (j * 4);
2264 }
2265 expand4[i] = v;
2266
2267 v = 0;
2268 for(j = 0; j < 4; j++) {
2269 v |= ((i >> (2 * j)) & 3) << (j * 4);
2270 }
2271 expand2[i] = v;
2272 }
2273 for(i = 0; i < 16; i++) {
2274 v = 0;
2275 for(j = 0; j < 4; j++) {
2276 b = ((i >> j) & 1);
2277 v |= b << (2 * j);
2278 v |= b << (2 * j + 1);
2279 }
2280 expand4to8[i] = v;
2281 }
2282
2283 /* valid range: 1 MB -> 256 MB */
2284 s->vram_size = 1024 * 1024;
2285 while (s->vram_size < (s->vram_size_mb << 20) &&
2286 s->vram_size < (256 << 20)) {
2287 s->vram_size <<= 1;
2288 }
2289 s->vram_size_mb = s->vram_size >> 20;
2290
2291 s->is_vbe_vmstate = 1;
2292 memory_region_init_ram(&s->vram, "vga.vram", s->vram_size);
2293 vmstate_register_ram_global(&s->vram);
2294 xen_register_framebuffer(&s->vram);
2295 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2296 s->get_bpp = vga_get_bpp;
2297 s->get_offsets = vga_get_offsets;
2298 s->get_resolution = vga_get_resolution;
2299 s->update = vga_update_display;
2300 s->invalidate = vga_invalidate_display;
2301 s->screen_dump = vga_screen_dump;
2302 s->text_update = vga_update_text;
2303 switch (vga_retrace_method) {
2304 case VGA_RETRACE_DUMB:
2305 s->retrace = vga_dumb_retrace;
2306 s->update_retrace_info = vga_dumb_update_retrace_info;
2307 break;
2308
2309 case VGA_RETRACE_PRECISE:
2310 s->retrace = vga_precise_retrace;
2311 s->update_retrace_info = vga_precise_update_retrace_info;
2312 break;
2313 }
2314 vga_dirty_log_start(s);
2315 }
2316
2317 static const MemoryRegionPortio vga_portio_list[] = {
2318 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2319 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2320 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2321 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2322 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2323 PORTIO_END_OF_LIST(),
2324 };
2325
2326 static const MemoryRegionPortio vbe_portio_list[] = {
2327 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2328 # ifdef TARGET_I386
2329 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2330 # endif
2331 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2332 PORTIO_END_OF_LIST(),
2333 };
2334
2335 /* Used by both ISA and PCI */
2336 MemoryRegion *vga_init_io(VGACommonState *s,
2337 const MemoryRegionPortio **vga_ports,
2338 const MemoryRegionPortio **vbe_ports)
2339 {
2340 MemoryRegion *vga_mem;
2341
2342 *vga_ports = vga_portio_list;
2343 *vbe_ports = vbe_portio_list;
2344
2345 vga_mem = g_malloc(sizeof(*vga_mem));
2346 memory_region_init_io(vga_mem, &vga_mem_ops, s,
2347 "vga-lowmem", 0x20000);
2348 memory_region_set_flush_coalesced(vga_mem);
2349
2350 return vga_mem;
2351 }
2352
2353 void vga_init(VGACommonState *s, MemoryRegion *address_space,
2354 MemoryRegion *address_space_io, bool init_vga_ports)
2355 {
2356 MemoryRegion *vga_io_memory;
2357 const MemoryRegionPortio *vga_ports, *vbe_ports;
2358 PortioList *vga_port_list = g_new(PortioList, 1);
2359 PortioList *vbe_port_list = g_new(PortioList, 1);
2360
2361 qemu_register_reset(vga_reset, s);
2362
2363 s->bank_offset = 0;
2364
2365 s->legacy_address_space = address_space;
2366
2367 vga_io_memory = vga_init_io(s, &vga_ports, &vbe_ports);
2368 memory_region_add_subregion_overlap(address_space,
2369 isa_mem_base + 0x000a0000,
2370 vga_io_memory,
2371 1);
2372 memory_region_set_coalescing(vga_io_memory);
2373 if (init_vga_ports) {
2374 portio_list_init(vga_port_list, vga_ports, s, "vga");
2375 portio_list_add(vga_port_list, address_space_io, 0x3b0);
2376 }
2377 if (vbe_ports) {
2378 portio_list_init(vbe_port_list, vbe_ports, s, "vbe");
2379 portio_list_add(vbe_port_list, address_space_io, 0x1ce);
2380 }
2381 }
2382
2383 void vga_init_vbe(VGACommonState *s, MemoryRegion *system_memory)
2384 {
2385 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2386 * so use an alias to avoid double-mapping the same region.
2387 */
2388 memory_region_init_alias(&s->vram_vbe, "vram.vbe",
2389 &s->vram, 0, memory_region_size(&s->vram));
2390 /* XXX: use optimized standard vga accesses */
2391 memory_region_add_subregion(system_memory,
2392 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2393 &s->vram_vbe);
2394 s->vbe_mapped = 1;
2395 }
2396 /********************************************************/
2397 /* vga screen dump */
2398
2399 void ppm_save(const char *filename, struct DisplaySurface *ds, Error **errp)
2400 {
2401 int width = pixman_image_get_width(ds->image);
2402 int height = pixman_image_get_height(ds->image);
2403 FILE *f;
2404 int y;
2405 int ret;
2406 pixman_image_t *linebuf;
2407
2408 trace_ppm_save(filename, ds);
2409 f = fopen(filename, "wb");
2410 if (!f) {
2411 error_setg(errp, "failed to open file '%s': %s", filename,
2412 strerror(errno));
2413 return;
2414 }
2415 ret = fprintf(f, "P6\n%d %d\n%d\n", width, height, 255);
2416 if (ret < 0) {
2417 linebuf = NULL;
2418 goto write_err;
2419 }
2420 linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, width);
2421 for (y = 0; y < height; y++) {
2422 qemu_pixman_linebuf_fill(linebuf, ds->image, width, 0, y);
2423 clearerr(f);
2424 ret = fwrite(pixman_image_get_data(linebuf), 1,
2425 pixman_image_get_stride(linebuf), f);
2426 (void)ret;
2427 if (ferror(f)) {
2428 goto write_err;
2429 }
2430 }
2431
2432 out:
2433 qemu_pixman_image_unref(linebuf);
2434 fclose(f);
2435 return;
2436
2437 write_err:
2438 error_setg(errp, "failed to write to file '%s': %s", filename,
2439 strerror(errno));
2440 unlink(filename);
2441 goto out;
2442 }
2443
2444 /* save the vga display in a PPM image even if no display is
2445 available */
2446 static void vga_screen_dump(void *opaque, const char *filename, bool cswitch,
2447 Error **errp)
2448 {
2449 VGACommonState *s = opaque;
2450 DisplaySurface *surface = qemu_console_surface(s->con);
2451
2452 if (cswitch) {
2453 vga_invalidate_display(s);
2454 }
2455 vga_hw_update();
2456 ppm_save(filename, surface, errp);
2457 }
Mirror of https://git.qemu.org/git/qemu.git