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virtio-pci: drop unused wmb macro
[qemu/qmp-unstable.git] / hw / display / vga.c
blob21a108d8c07f618d8f695eea00a1c92e25bd13b3
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 "vga.h"
26 #include "ui/console.h"
27 #include "hw/i386/pc.h"
28 #include "hw/pci/pci.h"
29 #include "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_update_memory_access(VGACommonState *s)
170 {
171 MemoryRegion *region, *old_region = s->chain4_alias;
172 hwaddr base, offset, size;
173
174 s->chain4_alias = NULL;
175
176 if ((s->sr[VGA_SEQ_PLANE_WRITE] & VGA_SR02_ALL_PLANES) ==
177 VGA_SR02_ALL_PLANES && s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
178 offset = 0;
179 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
180 case 0:
181 base = 0xa0000;
182 size = 0x20000;
183 break;
184 case 1:
185 base = 0xa0000;
186 size = 0x10000;
187 offset = s->bank_offset;
188 break;
189 case 2:
190 base = 0xb0000;
191 size = 0x8000;
192 break;
193 case 3:
194 default:
195 base = 0xb8000;
196 size = 0x8000;
197 break;
198 }
199 base += isa_mem_base;
200 region = g_malloc(sizeof(*region));
201 memory_region_init_alias(region, "vga.chain4", &s->vram, offset, size);
202 memory_region_add_subregion_overlap(s->legacy_address_space, base,
203 region, 2);
204 s->chain4_alias = region;
205 }
206 if (old_region) {
207 memory_region_del_subregion(s->legacy_address_space, old_region);
208 memory_region_destroy(old_region);
209 g_free(old_region);
210 s->plane_updated = 0xf;
211 }
212 }
213
214 static void vga_dumb_update_retrace_info(VGACommonState *s)
215 {
216 (void) s;
217 }
218
219 static void vga_precise_update_retrace_info(VGACommonState *s)
220 {
221 int htotal_chars;
222 int hretr_start_char;
223 int hretr_skew_chars;
224 int hretr_end_char;
225
226 int vtotal_lines;
227 int vretr_start_line;
228 int vretr_end_line;
229
230 int dots;
231 #if 0
232 int div2, sldiv2;
233 #endif
234 int clocking_mode;
235 int clock_sel;
236 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
237 int64_t chars_per_sec;
238 struct vga_precise_retrace *r = &s->retrace_info.precise;
239
240 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
241 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
242 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
243 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
244
245 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
246 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
247 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
248 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
249 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
250 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
251 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
252
253 clocking_mode = (s->sr[VGA_SEQ_CLOCK_MODE] >> 3) & 1;
254 clock_sel = (s->msr >> 2) & 3;
255 dots = (s->msr & 1) ? 8 : 9;
256
257 chars_per_sec = clk_hz[clock_sel] / dots;
258
259 htotal_chars <<= clocking_mode;
260
261 r->total_chars = vtotal_lines * htotal_chars;
262 if (r->freq) {
263 r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq);
264 } else {
265 r->ticks_per_char = get_ticks_per_sec() / chars_per_sec;
266 }
267
268 r->vstart = vretr_start_line;
269 r->vend = r->vstart + vretr_end_line + 1;
270
271 r->hstart = hretr_start_char + hretr_skew_chars;
272 r->hend = r->hstart + hretr_end_char + 1;
273 r->htotal = htotal_chars;
274
275 #if 0
276 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
277 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
278 printf (
279 "hz=%f\n"
280 "htotal = %d\n"
281 "hretr_start = %d\n"
282 "hretr_skew = %d\n"
283 "hretr_end = %d\n"
284 "vtotal = %d\n"
285 "vretr_start = %d\n"
286 "vretr_end = %d\n"
287 "div2 = %d sldiv2 = %d\n"
288 "clocking_mode = %d\n"
289 "clock_sel = %d %d\n"
290 "dots = %d\n"
291 "ticks/char = %" PRId64 "\n"
292 "\n",
293 (double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars),
294 htotal_chars,
295 hretr_start_char,
296 hretr_skew_chars,
297 hretr_end_char,
298 vtotal_lines,
299 vretr_start_line,
300 vretr_end_line,
301 div2, sldiv2,
302 clocking_mode,
303 clock_sel,
304 clk_hz[clock_sel],
305 dots,
306 r->ticks_per_char
307 );
308 #endif
309 }
310
311 static uint8_t vga_precise_retrace(VGACommonState *s)
312 {
313 struct vga_precise_retrace *r = &s->retrace_info.precise;
314 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
315
316 if (r->total_chars) {
317 int cur_line, cur_line_char, cur_char;
318 int64_t cur_tick;
319
320 cur_tick = qemu_get_clock_ns(vm_clock);
321
322 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
323 cur_line = cur_char / r->htotal;
324
325 if (cur_line >= r->vstart && cur_line <= r->vend) {
326 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
327 } else {
328 cur_line_char = cur_char % r->htotal;
329 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
330 val |= ST01_DISP_ENABLE;
331 }
332 }
333
334 return val;
335 } else {
336 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
337 }
338 }
339
340 static uint8_t vga_dumb_retrace(VGACommonState *s)
341 {
342 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
343 }
344
345 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
346 {
347 if (s->msr & VGA_MIS_COLOR) {
348 /* Color */
349 return (addr >= 0x3b0 && addr <= 0x3bf);
350 } else {
351 /* Monochrome */
352 return (addr >= 0x3d0 && addr <= 0x3df);
353 }
354 }
355
356 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
357 {
358 VGACommonState *s = opaque;
359 int val, index;
360
361 qemu_flush_coalesced_mmio_buffer();
362
363 if (vga_ioport_invalid(s, addr)) {
364 val = 0xff;
365 } else {
366 switch(addr) {
367 case VGA_ATT_W:
368 if (s->ar_flip_flop == 0) {
369 val = s->ar_index;
370 } else {
371 val = 0;
372 }
373 break;
374 case VGA_ATT_R:
375 index = s->ar_index & 0x1f;
376 if (index < VGA_ATT_C) {
377 val = s->ar[index];
378 } else {
379 val = 0;
380 }
381 break;
382 case VGA_MIS_W:
383 val = s->st00;
384 break;
385 case VGA_SEQ_I:
386 val = s->sr_index;
387 break;
388 case VGA_SEQ_D:
389 val = s->sr[s->sr_index];
390 #ifdef DEBUG_VGA_REG
391 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
392 #endif
393 break;
394 case VGA_PEL_IR:
395 val = s->dac_state;
396 break;
397 case VGA_PEL_IW:
398 val = s->dac_write_index;
399 break;
400 case VGA_PEL_D:
401 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
402 if (++s->dac_sub_index == 3) {
403 s->dac_sub_index = 0;
404 s->dac_read_index++;
405 }
406 break;
407 case VGA_FTC_R:
408 val = s->fcr;
409 break;
410 case VGA_MIS_R:
411 val = s->msr;
412 break;
413 case VGA_GFX_I:
414 val = s->gr_index;
415 break;
416 case VGA_GFX_D:
417 val = s->gr[s->gr_index];
418 #ifdef DEBUG_VGA_REG
419 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
420 #endif
421 break;
422 case VGA_CRT_IM:
423 case VGA_CRT_IC:
424 val = s->cr_index;
425 break;
426 case VGA_CRT_DM:
427 case VGA_CRT_DC:
428 val = s->cr[s->cr_index];
429 #ifdef DEBUG_VGA_REG
430 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
431 #endif
432 break;
433 case VGA_IS1_RM:
434 case VGA_IS1_RC:
435 /* just toggle to fool polling */
436 val = s->st01 = s->retrace(s);
437 s->ar_flip_flop = 0;
438 break;
439 default:
440 val = 0x00;
441 break;
442 }
443 }
444 #if defined(DEBUG_VGA)
445 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
446 #endif
447 return val;
448 }
449
450 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
451 {
452 VGACommonState *s = opaque;
453 int index;
454
455 qemu_flush_coalesced_mmio_buffer();
456
457 /* check port range access depending on color/monochrome mode */
458 if (vga_ioport_invalid(s, addr)) {
459 return;
460 }
461 #ifdef DEBUG_VGA
462 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
463 #endif
464
465 switch(addr) {
466 case VGA_ATT_W:
467 if (s->ar_flip_flop == 0) {
468 val &= 0x3f;
469 s->ar_index = val;
470 } else {
471 index = s->ar_index & 0x1f;
472 switch(index) {
473 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
474 s->ar[index] = val & 0x3f;
475 break;
476 case VGA_ATC_MODE:
477 s->ar[index] = val & ~0x10;
478 break;
479 case VGA_ATC_OVERSCAN:
480 s->ar[index] = val;
481 break;
482 case VGA_ATC_PLANE_ENABLE:
483 s->ar[index] = val & ~0xc0;
484 break;
485 case VGA_ATC_PEL:
486 s->ar[index] = val & ~0xf0;
487 break;
488 case VGA_ATC_COLOR_PAGE:
489 s->ar[index] = val & ~0xf0;
490 break;
491 default:
492 break;
493 }
494 }
495 s->ar_flip_flop ^= 1;
496 break;
497 case VGA_MIS_W:
498 s->msr = val & ~0x10;
499 s->update_retrace_info(s);
500 break;
501 case VGA_SEQ_I:
502 s->sr_index = val & 7;
503 break;
504 case VGA_SEQ_D:
505 #ifdef DEBUG_VGA_REG
506 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
507 #endif
508 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
509 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
510 s->update_retrace_info(s);
511 }
512 vga_update_memory_access(s);
513 break;
514 case VGA_PEL_IR:
515 s->dac_read_index = val;
516 s->dac_sub_index = 0;
517 s->dac_state = 3;
518 break;
519 case VGA_PEL_IW:
520 s->dac_write_index = val;
521 s->dac_sub_index = 0;
522 s->dac_state = 0;
523 break;
524 case VGA_PEL_D:
525 s->dac_cache[s->dac_sub_index] = val;
526 if (++s->dac_sub_index == 3) {
527 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
528 s->dac_sub_index = 0;
529 s->dac_write_index++;
530 }
531 break;
532 case VGA_GFX_I:
533 s->gr_index = val & 0x0f;
534 break;
535 case VGA_GFX_D:
536 #ifdef DEBUG_VGA_REG
537 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
538 #endif
539 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
540 vga_update_memory_access(s);
541 break;
542 case VGA_CRT_IM:
543 case VGA_CRT_IC:
544 s->cr_index = val;
545 break;
546 case VGA_CRT_DM:
547 case VGA_CRT_DC:
548 #ifdef DEBUG_VGA_REG
549 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
550 #endif
551 /* handle CR0-7 protection */
552 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
553 s->cr_index <= VGA_CRTC_OVERFLOW) {
554 /* can always write bit 4 of CR7 */
555 if (s->cr_index == VGA_CRTC_OVERFLOW) {
556 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
557 (val & 0x10);
558 }
559 return;
560 }
561 s->cr[s->cr_index] = val;
562
563 switch(s->cr_index) {
564 case VGA_CRTC_H_TOTAL:
565 case VGA_CRTC_H_SYNC_START:
566 case VGA_CRTC_H_SYNC_END:
567 case VGA_CRTC_V_TOTAL:
568 case VGA_CRTC_OVERFLOW:
569 case VGA_CRTC_V_SYNC_END:
570 case VGA_CRTC_MODE:
571 s->update_retrace_info(s);
572 break;
573 }
574 break;
575 case VGA_IS1_RM:
576 case VGA_IS1_RC:
577 s->fcr = val & 0x10;
578 break;
579 }
580 }
581
582 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
583 {
584 VGACommonState *s = opaque;
585 uint32_t val;
586 val = s->vbe_index;
587 return val;
588 }
589
590 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
591 {
592 VGACommonState *s = opaque;
593 uint32_t val;
594
595 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
596 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
597 switch(s->vbe_index) {
598 /* XXX: do not hardcode ? */
599 case VBE_DISPI_INDEX_XRES:
600 val = VBE_DISPI_MAX_XRES;
601 break;
602 case VBE_DISPI_INDEX_YRES:
603 val = VBE_DISPI_MAX_YRES;
604 break;
605 case VBE_DISPI_INDEX_BPP:
606 val = VBE_DISPI_MAX_BPP;
607 break;
608 default:
609 val = s->vbe_regs[s->vbe_index];
610 break;
611 }
612 } else {
613 val = s->vbe_regs[s->vbe_index];
614 }
615 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
616 val = s->vram_size / (64 * 1024);
617 } else {
618 val = 0;
619 }
620 #ifdef DEBUG_BOCHS_VBE
621 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
622 #endif
623 return val;
624 }
625
626 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
627 {
628 VGACommonState *s = opaque;
629 s->vbe_index = val;
630 }
631
632 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
633 {
634 VGACommonState *s = opaque;
635
636 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
637 #ifdef DEBUG_BOCHS_VBE
638 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
639 #endif
640 switch(s->vbe_index) {
641 case VBE_DISPI_INDEX_ID:
642 if (val == VBE_DISPI_ID0 ||
643 val == VBE_DISPI_ID1 ||
644 val == VBE_DISPI_ID2 ||
645 val == VBE_DISPI_ID3 ||
646 val == VBE_DISPI_ID4) {
647 s->vbe_regs[s->vbe_index] = val;
648 }
649 break;
650 case VBE_DISPI_INDEX_XRES:
651 if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
652 s->vbe_regs[s->vbe_index] = val;
653 }
654 break;
655 case VBE_DISPI_INDEX_YRES:
656 if (val <= VBE_DISPI_MAX_YRES) {
657 s->vbe_regs[s->vbe_index] = val;
658 }
659 break;
660 case VBE_DISPI_INDEX_BPP:
661 if (val == 0)
662 val = 8;
663 if (val == 4 || val == 8 || val == 15 ||
664 val == 16 || val == 24 || val == 32) {
665 s->vbe_regs[s->vbe_index] = val;
666 }
667 break;
668 case VBE_DISPI_INDEX_BANK:
669 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
670 val &= (s->vbe_bank_mask >> 2);
671 } else {
672 val &= s->vbe_bank_mask;
673 }
674 s->vbe_regs[s->vbe_index] = val;
675 s->bank_offset = (val << 16);
676 vga_update_memory_access(s);
677 break;
678 case VBE_DISPI_INDEX_ENABLE:
679 if ((val & VBE_DISPI_ENABLED) &&
680 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
681 int h, shift_control;
682
683 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
684 s->vbe_regs[VBE_DISPI_INDEX_XRES];
685 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
686 s->vbe_regs[VBE_DISPI_INDEX_YRES];
687 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
688 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
689
690 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
691 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
692 else
693 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
694 ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
695 s->vbe_start_addr = 0;
696
697 /* clear the screen (should be done in BIOS) */
698 if (!(val & VBE_DISPI_NOCLEARMEM)) {
699 memset(s->vram_ptr, 0,
700 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
701 }
702
703 /* we initialize the VGA graphic mode (should be done
704 in BIOS) */
705 /* graphic mode + memory map 1 */
706 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
707 VGA_GR06_GRAPHICS_MODE;
708 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
709 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
710 /* width */
711 s->cr[VGA_CRTC_H_DISP] =
712 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
713 /* height (only meaningful if < 1024) */
714 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
715 s->cr[VGA_CRTC_V_DISP_END] = h;
716 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
717 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
718 /* line compare to 1023 */
719 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
720 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
721 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
722
723 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
724 shift_control = 0;
725 s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
726 } else {
727 shift_control = 2;
728 /* set chain 4 mode */
729 s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
730 /* activate all planes */
731 s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
732 }
733 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
734 (shift_control << 5);
735 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
736 } else {
737 /* XXX: the bios should do that */
738 s->bank_offset = 0;
739 }
740 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
741 s->vbe_regs[s->vbe_index] = val;
742 vga_update_memory_access(s);
743 break;
744 case VBE_DISPI_INDEX_VIRT_WIDTH:
745 {
746 int w, h, line_offset;
747
748 if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
749 return;
750 w = val;
751 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
752 line_offset = w >> 1;
753 else
754 line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
755 h = s->vram_size / line_offset;
756 /* XXX: support weird bochs semantics ? */
757 if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
758 return;
759 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
760 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
761 s->vbe_line_offset = line_offset;
762 }
763 break;
764 case VBE_DISPI_INDEX_X_OFFSET:
765 case VBE_DISPI_INDEX_Y_OFFSET:
766 {
767 int x;
768 s->vbe_regs[s->vbe_index] = val;
769 s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
770 x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
771 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
772 s->vbe_start_addr += x >> 1;
773 else
774 s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
775 s->vbe_start_addr >>= 2;
776 }
777 break;
778 default:
779 break;
780 }
781 }
782 }
783
784 /* called for accesses between 0xa0000 and 0xc0000 */
785 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
786 {
787 int memory_map_mode, plane;
788 uint32_t ret;
789
790 /* convert to VGA memory offset */
791 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
792 addr &= 0x1ffff;
793 switch(memory_map_mode) {
794 case 0:
795 break;
796 case 1:
797 if (addr >= 0x10000)
798 return 0xff;
799 addr += s->bank_offset;
800 break;
801 case 2:
802 addr -= 0x10000;
803 if (addr >= 0x8000)
804 return 0xff;
805 break;
806 default:
807 case 3:
808 addr -= 0x18000;
809 if (addr >= 0x8000)
810 return 0xff;
811 break;
812 }
813
814 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
815 /* chain 4 mode : simplest access */
816 ret = s->vram_ptr[addr];
817 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
818 /* odd/even mode (aka text mode mapping) */
819 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
820 ret = s->vram_ptr[((addr & ~1) << 1) | plane];
821 } else {
822 /* standard VGA latched access */
823 s->latch = ((uint32_t *)s->vram_ptr)[addr];
824
825 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
826 /* read mode 0 */
827 plane = s->gr[VGA_GFX_PLANE_READ];
828 ret = GET_PLANE(s->latch, plane);
829 } else {
830 /* read mode 1 */
831 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
832 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
833 ret |= ret >> 16;
834 ret |= ret >> 8;
835 ret = (~ret) & 0xff;
836 }
837 }
838 return ret;
839 }
840
841 /* called for accesses between 0xa0000 and 0xc0000 */
842 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
843 {
844 int memory_map_mode, plane, write_mode, b, func_select, mask;
845 uint32_t write_mask, bit_mask, set_mask;
846
847 #ifdef DEBUG_VGA_MEM
848 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
849 #endif
850 /* convert to VGA memory offset */
851 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
852 addr &= 0x1ffff;
853 switch(memory_map_mode) {
854 case 0:
855 break;
856 case 1:
857 if (addr >= 0x10000)
858 return;
859 addr += s->bank_offset;
860 break;
861 case 2:
862 addr -= 0x10000;
863 if (addr >= 0x8000)
864 return;
865 break;
866 default:
867 case 3:
868 addr -= 0x18000;
869 if (addr >= 0x8000)
870 return;
871 break;
872 }
873
874 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
875 /* chain 4 mode : simplest access */
876 plane = addr & 3;
877 mask = (1 << plane);
878 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
879 s->vram_ptr[addr] = val;
880 #ifdef DEBUG_VGA_MEM
881 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
882 #endif
883 s->plane_updated |= mask; /* only used to detect font change */
884 memory_region_set_dirty(&s->vram, addr, 1);
885 }
886 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
887 /* odd/even mode (aka text mode mapping) */
888 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
889 mask = (1 << plane);
890 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
891 addr = ((addr & ~1) << 1) | plane;
892 s->vram_ptr[addr] = val;
893 #ifdef DEBUG_VGA_MEM
894 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
895 #endif
896 s->plane_updated |= mask; /* only used to detect font change */
897 memory_region_set_dirty(&s->vram, addr, 1);
898 }
899 } else {
900 /* standard VGA latched access */
901 write_mode = s->gr[VGA_GFX_MODE] & 3;
902 switch(write_mode) {
903 default:
904 case 0:
905 /* rotate */
906 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
907 val = ((val >> b) | (val << (8 - b))) & 0xff;
908 val |= val << 8;
909 val |= val << 16;
910
911 /* apply set/reset mask */
912 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
913 val = (val & ~set_mask) |
914 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
915 bit_mask = s->gr[VGA_GFX_BIT_MASK];
916 break;
917 case 1:
918 val = s->latch;
919 goto do_write;
920 case 2:
921 val = mask16[val & 0x0f];
922 bit_mask = s->gr[VGA_GFX_BIT_MASK];
923 break;
924 case 3:
925 /* rotate */
926 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
927 val = (val >> b) | (val << (8 - b));
928
929 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
930 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
931 break;
932 }
933
934 /* apply logical operation */
935 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
936 switch(func_select) {
937 case 0:
938 default:
939 /* nothing to do */
940 break;
941 case 1:
942 /* and */
943 val &= s->latch;
944 break;
945 case 2:
946 /* or */
947 val |= s->latch;
948 break;
949 case 3:
950 /* xor */
951 val ^= s->latch;
952 break;
953 }
954
955 /* apply bit mask */
956 bit_mask |= bit_mask << 8;
957 bit_mask |= bit_mask << 16;
958 val = (val & bit_mask) | (s->latch & ~bit_mask);
959
960 do_write:
961 /* mask data according to sr[2] */
962 mask = s->sr[VGA_SEQ_PLANE_WRITE];
963 s->plane_updated |= mask; /* only used to detect font change */
964 write_mask = mask16[mask];
965 ((uint32_t *)s->vram_ptr)[addr] =
966 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
967 (val & write_mask);
968 #ifdef DEBUG_VGA_MEM
969 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
970 addr * 4, write_mask, val);
971 #endif
972 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
973 }
974 }
975
976 typedef void vga_draw_glyph8_func(uint8_t *d, int linesize,
977 const uint8_t *font_ptr, int h,
978 uint32_t fgcol, uint32_t bgcol);
979 typedef void vga_draw_glyph9_func(uint8_t *d, int linesize,
980 const uint8_t *font_ptr, int h,
981 uint32_t fgcol, uint32_t bgcol, int dup9);
982 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
983 const uint8_t *s, int width);
984
985 #define DEPTH 8
986 #include "vga_template.h"
987
988 #define DEPTH 15
989 #include "vga_template.h"
990
991 #define BGR_FORMAT
992 #define DEPTH 15
993 #include "vga_template.h"
994
995 #define DEPTH 16
996 #include "vga_template.h"
997
998 #define BGR_FORMAT
999 #define DEPTH 16
1000 #include "vga_template.h"
1001
1002 #define DEPTH 32
1003 #include "vga_template.h"
1004
1005 #define BGR_FORMAT
1006 #define DEPTH 32
1007 #include "vga_template.h"
1008
1009 static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b)
1010 {
1011 unsigned int col;
1012 col = rgb_to_pixel8(r, g, b);
1013 col |= col << 8;
1014 col |= col << 16;
1015 return col;
1016 }
1017
1018 static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b)
1019 {
1020 unsigned int col;
1021 col = rgb_to_pixel15(r, g, b);
1022 col |= col << 16;
1023 return col;
1024 }
1025
1026 static unsigned int rgb_to_pixel15bgr_dup(unsigned int r, unsigned int g,
1027 unsigned int b)
1028 {
1029 unsigned int col;
1030 col = rgb_to_pixel15bgr(r, g, b);
1031 col |= col << 16;
1032 return col;
1033 }
1034
1035 static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b)
1036 {
1037 unsigned int col;
1038 col = rgb_to_pixel16(r, g, b);
1039 col |= col << 16;
1040 return col;
1041 }
1042
1043 static unsigned int rgb_to_pixel16bgr_dup(unsigned int r, unsigned int g,
1044 unsigned int b)
1045 {
1046 unsigned int col;
1047 col = rgb_to_pixel16bgr(r, g, b);
1048 col |= col << 16;
1049 return col;
1050 }
1051
1052 static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b)
1053 {
1054 unsigned int col;
1055 col = rgb_to_pixel32(r, g, b);
1056 return col;
1057 }
1058
1059 static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
1060 {
1061 unsigned int col;
1062 col = rgb_to_pixel32bgr(r, g, b);
1063 return col;
1064 }
1065
1066 /* return true if the palette was modified */
1067 static int update_palette16(VGACommonState *s)
1068 {
1069 int full_update, i;
1070 uint32_t v, col, *palette;
1071
1072 full_update = 0;
1073 palette = s->last_palette;
1074 for(i = 0; i < 16; i++) {
1075 v = s->ar[i];
1076 if (s->ar[VGA_ATC_MODE] & 0x80) {
1077 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1078 } else {
1079 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1080 }
1081 v = v * 3;
1082 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1083 c6_to_8(s->palette[v + 1]),
1084 c6_to_8(s->palette[v + 2]));
1085 if (col != palette[i]) {
1086 full_update = 1;
1087 palette[i] = col;
1088 }
1089 }
1090 return full_update;
1091 }
1092
1093 /* return true if the palette was modified */
1094 static int update_palette256(VGACommonState *s)
1095 {
1096 int full_update, i;
1097 uint32_t v, col, *palette;
1098
1099 full_update = 0;
1100 palette = s->last_palette;
1101 v = 0;
1102 for(i = 0; i < 256; i++) {
1103 if (s->dac_8bit) {
1104 col = s->rgb_to_pixel(s->palette[v],
1105 s->palette[v + 1],
1106 s->palette[v + 2]);
1107 } else {
1108 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1109 c6_to_8(s->palette[v + 1]),
1110 c6_to_8(s->palette[v + 2]));
1111 }
1112 if (col != palette[i]) {
1113 full_update = 1;
1114 palette[i] = col;
1115 }
1116 v += 3;
1117 }
1118 return full_update;
1119 }
1120
1121 static void vga_get_offsets(VGACommonState *s,
1122 uint32_t *pline_offset,
1123 uint32_t *pstart_addr,
1124 uint32_t *pline_compare)
1125 {
1126 uint32_t start_addr, line_offset, line_compare;
1127
1128 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1129 line_offset = s->vbe_line_offset;
1130 start_addr = s->vbe_start_addr;
1131 line_compare = 65535;
1132 } else {
1133 /* compute line_offset in bytes */
1134 line_offset = s->cr[VGA_CRTC_OFFSET];
1135 line_offset <<= 3;
1136
1137 /* starting address */
1138 start_addr = s->cr[VGA_CRTC_START_LO] |
1139 (s->cr[VGA_CRTC_START_HI] << 8);
1140
1141 /* line compare */
1142 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1143 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1144 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1145 }
1146 *pline_offset = line_offset;
1147 *pstart_addr = start_addr;
1148 *pline_compare = line_compare;
1149 }
1150
1151 /* update start_addr and line_offset. Return TRUE if modified */
1152 static int update_basic_params(VGACommonState *s)
1153 {
1154 int full_update;
1155 uint32_t start_addr, line_offset, line_compare;
1156
1157 full_update = 0;
1158
1159 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1160
1161 if (line_offset != s->line_offset ||
1162 start_addr != s->start_addr ||
1163 line_compare != s->line_compare) {
1164 s->line_offset = line_offset;
1165 s->start_addr = start_addr;
1166 s->line_compare = line_compare;
1167 full_update = 1;
1168 }
1169 return full_update;
1170 }
1171
1172 #define NB_DEPTHS 7
1173
1174 static inline int get_depth_index(DisplaySurface *s)
1175 {
1176 switch (surface_bits_per_pixel(s)) {
1177 default:
1178 case 8:
1179 return 0;
1180 case 15:
1181 return 1;
1182 case 16:
1183 return 2;
1184 case 32:
1185 if (is_surface_bgr(s)) {
1186 return 4;
1187 } else {
1188 return 3;
1189 }
1190 }
1191 }
1192
1193 static vga_draw_glyph8_func * const vga_draw_glyph8_table[NB_DEPTHS] = {
1194 vga_draw_glyph8_8,
1195 vga_draw_glyph8_16,
1196 vga_draw_glyph8_16,
1197 vga_draw_glyph8_32,
1198 vga_draw_glyph8_32,
1199 vga_draw_glyph8_16,
1200 vga_draw_glyph8_16,
1201 };
1202
1203 static vga_draw_glyph8_func * const vga_draw_glyph16_table[NB_DEPTHS] = {
1204 vga_draw_glyph16_8,
1205 vga_draw_glyph16_16,
1206 vga_draw_glyph16_16,
1207 vga_draw_glyph16_32,
1208 vga_draw_glyph16_32,
1209 vga_draw_glyph16_16,
1210 vga_draw_glyph16_16,
1211 };
1212
1213 static vga_draw_glyph9_func * const vga_draw_glyph9_table[NB_DEPTHS] = {
1214 vga_draw_glyph9_8,
1215 vga_draw_glyph9_16,
1216 vga_draw_glyph9_16,
1217 vga_draw_glyph9_32,
1218 vga_draw_glyph9_32,
1219 vga_draw_glyph9_16,
1220 vga_draw_glyph9_16,
1221 };
1222
1223 static const uint8_t cursor_glyph[32 * 4] = {
1224 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1225 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1226 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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 };
1241
1242 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1243 int *pcwidth, int *pcheight)
1244 {
1245 int width, cwidth, height, cheight;
1246
1247 /* total width & height */
1248 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1249 cwidth = 8;
1250 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
1251 cwidth = 9;
1252 }
1253 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
1254 cwidth = 16; /* NOTE: no 18 pixel wide */
1255 }
1256 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1257 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1258 /* ugly hack for CGA 160x100x16 - explain me the logic */
1259 height = 100;
1260 } else {
1261 height = s->cr[VGA_CRTC_V_DISP_END] |
1262 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1263 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1264 height = (height + 1) / cheight;
1265 }
1266
1267 *pwidth = width;
1268 *pheight = height;
1269 *pcwidth = cwidth;
1270 *pcheight = cheight;
1271 }
1272
1273 typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
1274
1275 static rgb_to_pixel_dup_func * const rgb_to_pixel_dup_table[NB_DEPTHS] = {
1276 rgb_to_pixel8_dup,
1277 rgb_to_pixel15_dup,
1278 rgb_to_pixel16_dup,
1279 rgb_to_pixel32_dup,
1280 rgb_to_pixel32bgr_dup,
1281 rgb_to_pixel15bgr_dup,
1282 rgb_to_pixel16bgr_dup,
1283 };
1284
1285 /*
1286 * Text mode update
1287 * Missing:
1288 * - double scan
1289 * - double width
1290 * - underline
1291 * - flashing
1292 */
1293 static void vga_draw_text(VGACommonState *s, int full_update)
1294 {
1295 DisplaySurface *surface = qemu_console_surface(s->con);
1296 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1297 int cx_min, cx_max, linesize, x_incr, line, line1;
1298 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1299 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1300 const uint8_t *font_ptr, *font_base[2];
1301 int dup9, line_offset, depth_index;
1302 uint32_t *palette;
1303 uint32_t *ch_attr_ptr;
1304 vga_draw_glyph8_func *vga_draw_glyph8;
1305 vga_draw_glyph9_func *vga_draw_glyph9;
1306 int64_t now = qemu_get_clock_ms(vm_clock);
1307
1308 /* compute font data address (in plane 2) */
1309 v = s->sr[VGA_SEQ_CHARACTER_MAP];
1310 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1311 if (offset != s->font_offsets[0]) {
1312 s->font_offsets[0] = offset;
1313 full_update = 1;
1314 }
1315 font_base[0] = s->vram_ptr + offset;
1316
1317 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1318 font_base[1] = s->vram_ptr + offset;
1319 if (offset != s->font_offsets[1]) {
1320 s->font_offsets[1] = offset;
1321 full_update = 1;
1322 }
1323 if (s->plane_updated & (1 << 2) || s->chain4_alias) {
1324 /* if the plane 2 was modified since the last display, it
1325 indicates the font may have been modified */
1326 s->plane_updated = 0;
1327 full_update = 1;
1328 }
1329 full_update |= update_basic_params(s);
1330
1331 line_offset = s->line_offset;
1332
1333 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1334 if ((height * width) <= 1) {
1335 /* better than nothing: exit if transient size is too small */
1336 return;
1337 }
1338 if ((height * width) > CH_ATTR_SIZE) {
1339 /* better than nothing: exit if transient size is too big */
1340 return;
1341 }
1342
1343 if (width != s->last_width || height != s->last_height ||
1344 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1345 s->last_scr_width = width * cw;
1346 s->last_scr_height = height * cheight;
1347 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1348 surface = qemu_console_surface(s->con);
1349 dpy_text_resize(s->con, width, height);
1350 s->last_depth = 0;
1351 s->last_width = width;
1352 s->last_height = height;
1353 s->last_ch = cheight;
1354 s->last_cw = cw;
1355 full_update = 1;
1356 }
1357 s->rgb_to_pixel =
1358 rgb_to_pixel_dup_table[get_depth_index(surface)];
1359 full_update |= update_palette16(s);
1360 palette = s->last_palette;
1361 x_incr = cw * surface_bytes_per_pixel(surface);
1362
1363 if (full_update) {
1364 s->full_update_text = 1;
1365 }
1366 if (s->full_update_gfx) {
1367 s->full_update_gfx = 0;
1368 full_update |= 1;
1369 }
1370
1371 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1372 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1373 if (cursor_offset != s->cursor_offset ||
1374 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1375 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1376 /* if the cursor position changed, we update the old and new
1377 chars */
1378 if (s->cursor_offset < CH_ATTR_SIZE)
1379 s->last_ch_attr[s->cursor_offset] = -1;
1380 if (cursor_offset < CH_ATTR_SIZE)
1381 s->last_ch_attr[cursor_offset] = -1;
1382 s->cursor_offset = cursor_offset;
1383 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1384 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1385 }
1386 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1387 if (now >= s->cursor_blink_time) {
1388 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1389 s->cursor_visible_phase = !s->cursor_visible_phase;
1390 }
1391
1392 depth_index = get_depth_index(surface);
1393 if (cw == 16)
1394 vga_draw_glyph8 = vga_draw_glyph16_table[depth_index];
1395 else
1396 vga_draw_glyph8 = vga_draw_glyph8_table[depth_index];
1397 vga_draw_glyph9 = vga_draw_glyph9_table[depth_index];
1398
1399 dest = surface_data(surface);
1400 linesize = surface_stride(surface);
1401 ch_attr_ptr = s->last_ch_attr;
1402 line = 0;
1403 offset = s->start_addr * 4;
1404 for(cy = 0; cy < height; cy++) {
1405 d1 = dest;
1406 src = s->vram_ptr + offset;
1407 cx_min = width;
1408 cx_max = -1;
1409 for(cx = 0; cx < width; cx++) {
1410 ch_attr = *(uint16_t *)src;
1411 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1412 if (cx < cx_min)
1413 cx_min = cx;
1414 if (cx > cx_max)
1415 cx_max = cx;
1416 *ch_attr_ptr = ch_attr;
1417 #ifdef HOST_WORDS_BIGENDIAN
1418 ch = ch_attr >> 8;
1419 cattr = ch_attr & 0xff;
1420 #else
1421 ch = ch_attr & 0xff;
1422 cattr = ch_attr >> 8;
1423 #endif
1424 font_ptr = font_base[(cattr >> 3) & 1];
1425 font_ptr += 32 * 4 * ch;
1426 bgcol = palette[cattr >> 4];
1427 fgcol = palette[cattr & 0x0f];
1428 if (cw != 9) {
1429 vga_draw_glyph8(d1, linesize,
1430 font_ptr, cheight, fgcol, bgcol);
1431 } else {
1432 dup9 = 0;
1433 if (ch >= 0xb0 && ch <= 0xdf &&
1434 (s->ar[VGA_ATC_MODE] & 0x04)) {
1435 dup9 = 1;
1436 }
1437 vga_draw_glyph9(d1, linesize,
1438 font_ptr, cheight, fgcol, bgcol, dup9);
1439 }
1440 if (src == cursor_ptr &&
1441 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1442 s->cursor_visible_phase) {
1443 int line_start, line_last, h;
1444 /* draw the cursor */
1445 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1446 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1447 /* XXX: check that */
1448 if (line_last > cheight - 1)
1449 line_last = cheight - 1;
1450 if (line_last >= line_start && line_start < cheight) {
1451 h = line_last - line_start + 1;
1452 d = d1 + linesize * line_start;
1453 if (cw != 9) {
1454 vga_draw_glyph8(d, linesize,
1455 cursor_glyph, h, fgcol, bgcol);
1456 } else {
1457 vga_draw_glyph9(d, linesize,
1458 cursor_glyph, h, fgcol, bgcol, 1);
1459 }
1460 }
1461 }
1462 }
1463 d1 += x_incr;
1464 src += 4;
1465 ch_attr_ptr++;
1466 }
1467 if (cx_max != -1) {
1468 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1469 (cx_max - cx_min + 1) * cw, cheight);
1470 }
1471 dest += linesize * cheight;
1472 line1 = line + cheight;
1473 offset += line_offset;
1474 if (line < s->line_compare && line1 >= s->line_compare) {
1475 offset = 0;
1476 }
1477 line = line1;
1478 }
1479 }
1480
1481 enum {
1482 VGA_DRAW_LINE2,
1483 VGA_DRAW_LINE2D2,
1484 VGA_DRAW_LINE4,
1485 VGA_DRAW_LINE4D2,
1486 VGA_DRAW_LINE8D2,
1487 VGA_DRAW_LINE8,
1488 VGA_DRAW_LINE15,
1489 VGA_DRAW_LINE16,
1490 VGA_DRAW_LINE24,
1491 VGA_DRAW_LINE32,
1492 VGA_DRAW_LINE_NB,
1493 };
1494
1495 static vga_draw_line_func * const vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
1496 vga_draw_line2_8,
1497 vga_draw_line2_16,
1498 vga_draw_line2_16,
1499 vga_draw_line2_32,
1500 vga_draw_line2_32,
1501 vga_draw_line2_16,
1502 vga_draw_line2_16,
1503
1504 vga_draw_line2d2_8,
1505 vga_draw_line2d2_16,
1506 vga_draw_line2d2_16,
1507 vga_draw_line2d2_32,
1508 vga_draw_line2d2_32,
1509 vga_draw_line2d2_16,
1510 vga_draw_line2d2_16,
1511
1512 vga_draw_line4_8,
1513 vga_draw_line4_16,
1514 vga_draw_line4_16,
1515 vga_draw_line4_32,
1516 vga_draw_line4_32,
1517 vga_draw_line4_16,
1518 vga_draw_line4_16,
1519
1520 vga_draw_line4d2_8,
1521 vga_draw_line4d2_16,
1522 vga_draw_line4d2_16,
1523 vga_draw_line4d2_32,
1524 vga_draw_line4d2_32,
1525 vga_draw_line4d2_16,
1526 vga_draw_line4d2_16,
1527
1528 vga_draw_line8d2_8,
1529 vga_draw_line8d2_16,
1530 vga_draw_line8d2_16,
1531 vga_draw_line8d2_32,
1532 vga_draw_line8d2_32,
1533 vga_draw_line8d2_16,
1534 vga_draw_line8d2_16,
1535
1536 vga_draw_line8_8,
1537 vga_draw_line8_16,
1538 vga_draw_line8_16,
1539 vga_draw_line8_32,
1540 vga_draw_line8_32,
1541 vga_draw_line8_16,
1542 vga_draw_line8_16,
1543
1544 vga_draw_line15_8,
1545 vga_draw_line15_15,
1546 vga_draw_line15_16,
1547 vga_draw_line15_32,
1548 vga_draw_line15_32bgr,
1549 vga_draw_line15_15bgr,
1550 vga_draw_line15_16bgr,
1551
1552 vga_draw_line16_8,
1553 vga_draw_line16_15,
1554 vga_draw_line16_16,
1555 vga_draw_line16_32,
1556 vga_draw_line16_32bgr,
1557 vga_draw_line16_15bgr,
1558 vga_draw_line16_16bgr,
1559
1560 vga_draw_line24_8,
1561 vga_draw_line24_15,
1562 vga_draw_line24_16,
1563 vga_draw_line24_32,
1564 vga_draw_line24_32bgr,
1565 vga_draw_line24_15bgr,
1566 vga_draw_line24_16bgr,
1567
1568 vga_draw_line32_8,
1569 vga_draw_line32_15,
1570 vga_draw_line32_16,
1571 vga_draw_line32_32,
1572 vga_draw_line32_32bgr,
1573 vga_draw_line32_15bgr,
1574 vga_draw_line32_16bgr,
1575 };
1576
1577 static int vga_get_bpp(VGACommonState *s)
1578 {
1579 int ret;
1580
1581 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1582 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1583 } else {
1584 ret = 0;
1585 }
1586 return ret;
1587 }
1588
1589 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1590 {
1591 int width, height;
1592
1593 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1594 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1595 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1596 } else {
1597 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1598 height = s->cr[VGA_CRTC_V_DISP_END] |
1599 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1600 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1601 height = (height + 1);
1602 }
1603 *pwidth = width;
1604 *pheight = height;
1605 }
1606
1607 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1608 {
1609 int y;
1610 if (y1 >= VGA_MAX_HEIGHT)
1611 return;
1612 if (y2 >= VGA_MAX_HEIGHT)
1613 y2 = VGA_MAX_HEIGHT;
1614 for(y = y1; y < y2; y++) {
1615 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1616 }
1617 }
1618
1619 void vga_sync_dirty_bitmap(VGACommonState *s)
1620 {
1621 memory_region_sync_dirty_bitmap(&s->vram);
1622 }
1623
1624 void vga_dirty_log_start(VGACommonState *s)
1625 {
1626 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1627 }
1628
1629 void vga_dirty_log_stop(VGACommonState *s)
1630 {
1631 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1632 }
1633
1634 /*
1635 * graphic modes
1636 */
1637 static void vga_draw_graphic(VGACommonState *s, int full_update)
1638 {
1639 DisplaySurface *surface = qemu_console_surface(s->con);
1640 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1641 int width, height, shift_control, line_offset, bwidth, bits;
1642 ram_addr_t page0, page1, page_min, page_max;
1643 int disp_width, multi_scan, multi_run;
1644 uint8_t *d;
1645 uint32_t v, addr1, addr;
1646 vga_draw_line_func *vga_draw_line;
1647 #if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
1648 static const bool byteswap = false;
1649 #else
1650 static const bool byteswap = true;
1651 #endif
1652
1653 full_update |= update_basic_params(s);
1654
1655 if (!full_update)
1656 vga_sync_dirty_bitmap(s);
1657
1658 s->get_resolution(s, &width, &height);
1659 disp_width = width;
1660
1661 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1662 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1663 if (shift_control != 1) {
1664 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1665 - 1;
1666 } else {
1667 /* in CGA modes, multi_scan is ignored */
1668 /* XXX: is it correct ? */
1669 multi_scan = double_scan;
1670 }
1671 multi_run = multi_scan;
1672 if (shift_control != s->shift_control ||
1673 double_scan != s->double_scan) {
1674 full_update = 1;
1675 s->shift_control = shift_control;
1676 s->double_scan = double_scan;
1677 }
1678
1679 if (shift_control == 0) {
1680 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1681 disp_width <<= 1;
1682 }
1683 } else if (shift_control == 1) {
1684 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1685 disp_width <<= 1;
1686 }
1687 }
1688
1689 depth = s->get_bpp(s);
1690 if (s->line_offset != s->last_line_offset ||
1691 disp_width != s->last_width ||
1692 height != s->last_height ||
1693 s->last_depth != depth) {
1694 if (depth == 32 || (depth == 16 && !byteswap)) {
1695 surface = qemu_create_displaysurface_from(disp_width,
1696 height, depth, s->line_offset,
1697 s->vram_ptr + (s->start_addr * 4), byteswap);
1698 dpy_gfx_replace_surface(s->con, surface);
1699 } else {
1700 qemu_console_resize(s->con, disp_width, height);
1701 surface = qemu_console_surface(s->con);
1702 }
1703 s->last_scr_width = disp_width;
1704 s->last_scr_height = height;
1705 s->last_width = disp_width;
1706 s->last_height = height;
1707 s->last_line_offset = s->line_offset;
1708 s->last_depth = depth;
1709 full_update = 1;
1710 } else if (is_buffer_shared(surface) &&
1711 (full_update || surface_data(surface) != s->vram_ptr
1712 + (s->start_addr * 4))) {
1713 DisplaySurface *surface;
1714 surface = qemu_create_displaysurface_from(disp_width,
1715 height, depth, s->line_offset,
1716 s->vram_ptr + (s->start_addr * 4), byteswap);
1717 dpy_gfx_replace_surface(s->con, surface);
1718 }
1719
1720 s->rgb_to_pixel =
1721 rgb_to_pixel_dup_table[get_depth_index(surface)];
1722
1723 if (shift_control == 0) {
1724 full_update |= update_palette16(s);
1725 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1726 v = VGA_DRAW_LINE4D2;
1727 } else {
1728 v = VGA_DRAW_LINE4;
1729 }
1730 bits = 4;
1731 } else if (shift_control == 1) {
1732 full_update |= update_palette16(s);
1733 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1734 v = VGA_DRAW_LINE2D2;
1735 } else {
1736 v = VGA_DRAW_LINE2;
1737 }
1738 bits = 4;
1739 } else {
1740 switch(s->get_bpp(s)) {
1741 default:
1742 case 0:
1743 full_update |= update_palette256(s);
1744 v = VGA_DRAW_LINE8D2;
1745 bits = 4;
1746 break;
1747 case 8:
1748 full_update |= update_palette256(s);
1749 v = VGA_DRAW_LINE8;
1750 bits = 8;
1751 break;
1752 case 15:
1753 v = VGA_DRAW_LINE15;
1754 bits = 16;
1755 break;
1756 case 16:
1757 v = VGA_DRAW_LINE16;
1758 bits = 16;
1759 break;
1760 case 24:
1761 v = VGA_DRAW_LINE24;
1762 bits = 24;
1763 break;
1764 case 32:
1765 v = VGA_DRAW_LINE32;
1766 bits = 32;
1767 break;
1768 }
1769 }
1770 vga_draw_line = vga_draw_line_table[v * NB_DEPTHS +
1771 get_depth_index(surface)];
1772
1773 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1774 s->cursor_invalidate(s);
1775 }
1776
1777 line_offset = s->line_offset;
1778 #if 0
1779 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",
1780 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1781 s->line_compare, s->sr[VGA_SEQ_CLOCK_MODE]);
1782 #endif
1783 addr1 = (s->start_addr * 4);
1784 bwidth = (width * bits + 7) / 8;
1785 y_start = -1;
1786 page_min = -1;
1787 page_max = 0;
1788 d = surface_data(surface);
1789 linesize = surface_stride(surface);
1790 y1 = 0;
1791 for(y = 0; y < height; y++) {
1792 addr = addr1;
1793 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1794 int shift;
1795 /* CGA compatibility handling */
1796 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1797 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1798 }
1799 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1800 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1801 }
1802 update = full_update;
1803 page0 = addr;
1804 page1 = addr + bwidth - 1;
1805 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
1806 DIRTY_MEMORY_VGA);
1807 /* explicit invalidation for the hardware cursor */
1808 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1809 if (update) {
1810 if (y_start < 0)
1811 y_start = y;
1812 if (page0 < page_min)
1813 page_min = page0;
1814 if (page1 > page_max)
1815 page_max = page1;
1816 if (!(is_buffer_shared(surface))) {
1817 vga_draw_line(s, d, s->vram_ptr + addr, width);
1818 if (s->cursor_draw_line)
1819 s->cursor_draw_line(s, d, y);
1820 }
1821 } else {
1822 if (y_start >= 0) {
1823 /* flush to display */
1824 dpy_gfx_update(s->con, 0, y_start,
1825 disp_width, y - y_start);
1826 y_start = -1;
1827 }
1828 }
1829 if (!multi_run) {
1830 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1831 if ((y1 & mask) == mask)
1832 addr1 += line_offset;
1833 y1++;
1834 multi_run = multi_scan;
1835 } else {
1836 multi_run--;
1837 }
1838 /* line compare acts on the displayed lines */
1839 if (y == s->line_compare)
1840 addr1 = 0;
1841 d += linesize;
1842 }
1843 if (y_start >= 0) {
1844 /* flush to display */
1845 dpy_gfx_update(s->con, 0, y_start,
1846 disp_width, y - y_start);
1847 }
1848 /* reset modified pages */
1849 if (page_max >= page_min) {
1850 memory_region_reset_dirty(&s->vram,
1851 page_min,
1852 page_max - page_min,
1853 DIRTY_MEMORY_VGA);
1854 }
1855 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1856 }
1857
1858 static void vga_draw_blank(VGACommonState *s, int full_update)
1859 {
1860 DisplaySurface *surface = qemu_console_surface(s->con);
1861 int i, w, val;
1862 uint8_t *d;
1863
1864 if (!full_update)
1865 return;
1866 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1867 return;
1868
1869 s->rgb_to_pixel =
1870 rgb_to_pixel_dup_table[get_depth_index(surface)];
1871 if (surface_bits_per_pixel(surface) == 8) {
1872 val = s->rgb_to_pixel(0, 0, 0);
1873 } else {
1874 val = 0;
1875 }
1876 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1877 d = surface_data(surface);
1878 for(i = 0; i < s->last_scr_height; i++) {
1879 memset(d, val, w);
1880 d += surface_stride(surface);
1881 }
1882 dpy_gfx_update(s->con, 0, 0,
1883 s->last_scr_width, s->last_scr_height);
1884 }
1885
1886 #define GMODE_TEXT 0
1887 #define GMODE_GRAPH 1
1888 #define GMODE_BLANK 2
1889
1890 static void vga_update_display(void *opaque)
1891 {
1892 VGACommonState *s = opaque;
1893 DisplaySurface *surface = qemu_console_surface(s->con);
1894 int full_update, graphic_mode;
1895
1896 qemu_flush_coalesced_mmio_buffer();
1897
1898 if (surface_bits_per_pixel(surface) == 0) {
1899 /* nothing to do */
1900 } else {
1901 full_update = 0;
1902 if (!(s->ar_index & 0x20)) {
1903 graphic_mode = GMODE_BLANK;
1904 } else {
1905 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1906 }
1907 if (graphic_mode != s->graphic_mode) {
1908 s->graphic_mode = graphic_mode;
1909 s->cursor_blink_time = qemu_get_clock_ms(vm_clock);
1910 full_update = 1;
1911 }
1912 switch(graphic_mode) {
1913 case GMODE_TEXT:
1914 vga_draw_text(s, full_update);
1915 break;
1916 case GMODE_GRAPH:
1917 vga_draw_graphic(s, full_update);
1918 break;
1919 case GMODE_BLANK:
1920 default:
1921 vga_draw_blank(s, full_update);
1922 break;
1923 }
1924 }
1925 }
1926
1927 /* force a full display refresh */
1928 static void vga_invalidate_display(void *opaque)
1929 {
1930 VGACommonState *s = opaque;
1931
1932 s->last_width = -1;
1933 s->last_height = -1;
1934 }
1935
1936 void vga_common_reset(VGACommonState *s)
1937 {
1938 s->sr_index = 0;
1939 memset(s->sr, '\0', sizeof(s->sr));
1940 s->gr_index = 0;
1941 memset(s->gr, '\0', sizeof(s->gr));
1942 s->ar_index = 0;
1943 memset(s->ar, '\0', sizeof(s->ar));
1944 s->ar_flip_flop = 0;
1945 s->cr_index = 0;
1946 memset(s->cr, '\0', sizeof(s->cr));
1947 s->msr = 0;
1948 s->fcr = 0;
1949 s->st00 = 0;
1950 s->st01 = 0;
1951 s->dac_state = 0;
1952 s->dac_sub_index = 0;
1953 s->dac_read_index = 0;
1954 s->dac_write_index = 0;
1955 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1956 s->dac_8bit = 0;
1957 memset(s->palette, '\0', sizeof(s->palette));
1958 s->bank_offset = 0;
1959 s->vbe_index = 0;
1960 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1961 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1962 s->vbe_start_addr = 0;
1963 s->vbe_line_offset = 0;
1964 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1965 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1966 s->graphic_mode = -1; /* force full update */
1967 s->shift_control = 0;
1968 s->double_scan = 0;
1969 s->line_offset = 0;
1970 s->line_compare = 0;
1971 s->start_addr = 0;
1972 s->plane_updated = 0;
1973 s->last_cw = 0;
1974 s->last_ch = 0;
1975 s->last_width = 0;
1976 s->last_height = 0;
1977 s->last_scr_width = 0;
1978 s->last_scr_height = 0;
1979 s->cursor_start = 0;
1980 s->cursor_end = 0;
1981 s->cursor_offset = 0;
1982 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1983 memset(s->last_palette, '\0', sizeof(s->last_palette));
1984 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1985 switch (vga_retrace_method) {
1986 case VGA_RETRACE_DUMB:
1987 break;
1988 case VGA_RETRACE_PRECISE:
1989 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1990 break;
1991 }
1992 vga_update_memory_access(s);
1993 }
1994
1995 static void vga_reset(void *opaque)
1996 {
1997 VGACommonState *s = opaque;
1998 vga_common_reset(s);
1999 }
2000
2001 #define TEXTMODE_X(x) ((x) % width)
2002 #define TEXTMODE_Y(x) ((x) / width)
2003 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
2004 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
2005 /* relay text rendering to the display driver
2006 * instead of doing a full vga_update_display() */
2007 static void vga_update_text(void *opaque, console_ch_t *chardata)
2008 {
2009 VGACommonState *s = opaque;
2010 int graphic_mode, i, cursor_offset, cursor_visible;
2011 int cw, cheight, width, height, size, c_min, c_max;
2012 uint32_t *src;
2013 console_ch_t *dst, val;
2014 char msg_buffer[80];
2015 int full_update = 0;
2016
2017 qemu_flush_coalesced_mmio_buffer();
2018
2019 if (!(s->ar_index & 0x20)) {
2020 graphic_mode = GMODE_BLANK;
2021 } else {
2022 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
2023 }
2024 if (graphic_mode != s->graphic_mode) {
2025 s->graphic_mode = graphic_mode;
2026 full_update = 1;
2027 }
2028 if (s->last_width == -1) {
2029 s->last_width = 0;
2030 full_update = 1;
2031 }
2032
2033 switch (graphic_mode) {
2034 case GMODE_TEXT:
2035 /* TODO: update palette */
2036 full_update |= update_basic_params(s);
2037
2038 /* total width & height */
2039 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
2040 cw = 8;
2041 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
2042 cw = 9;
2043 }
2044 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
2045 cw = 16; /* NOTE: no 18 pixel wide */
2046 }
2047 width = (s->cr[VGA_CRTC_H_DISP] + 1);
2048 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
2049 /* ugly hack for CGA 160x100x16 - explain me the logic */
2050 height = 100;
2051 } else {
2052 height = s->cr[VGA_CRTC_V_DISP_END] |
2053 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
2054 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
2055 height = (height + 1) / cheight;
2056 }
2057
2058 size = (height * width);
2059 if (size > CH_ATTR_SIZE) {
2060 if (!full_update)
2061 return;
2062
2063 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
2064 width, height);
2065 break;
2066 }
2067
2068 if (width != s->last_width || height != s->last_height ||
2069 cw != s->last_cw || cheight != s->last_ch) {
2070 s->last_scr_width = width * cw;
2071 s->last_scr_height = height * cheight;
2072 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
2073 dpy_text_resize(s->con, width, height);
2074 s->last_depth = 0;
2075 s->last_width = width;
2076 s->last_height = height;
2077 s->last_ch = cheight;
2078 s->last_cw = cw;
2079 full_update = 1;
2080 }
2081
2082 if (full_update) {
2083 s->full_update_gfx = 1;
2084 }
2085 if (s->full_update_text) {
2086 s->full_update_text = 0;
2087 full_update |= 1;
2088 }
2089
2090 /* Update "hardware" cursor */
2091 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
2092 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
2093 if (cursor_offset != s->cursor_offset ||
2094 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
2095 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
2096 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
2097 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
2098 dpy_text_cursor(s->con,
2099 TEXTMODE_X(cursor_offset),
2100 TEXTMODE_Y(cursor_offset));
2101 else
2102 dpy_text_cursor(s->con, -1, -1);
2103 s->cursor_offset = cursor_offset;
2104 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
2105 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
2106 }
2107
2108 src = (uint32_t *) s->vram_ptr + s->start_addr;
2109 dst = chardata;
2110
2111 if (full_update) {
2112 for (i = 0; i < size; src ++, dst ++, i ++)
2113 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
2114
2115 dpy_text_update(s->con, 0, 0, width, height);
2116 } else {
2117 c_max = 0;
2118
2119 for (i = 0; i < size; src ++, dst ++, i ++) {
2120 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2121 if (*dst != val) {
2122 *dst = val;
2123 c_max = i;
2124 break;
2125 }
2126 }
2127 c_min = i;
2128 for (; i < size; src ++, dst ++, i ++) {
2129 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2130 if (*dst != val) {
2131 *dst = val;
2132 c_max = i;
2133 }
2134 }
2135
2136 if (c_min <= c_max) {
2137 i = TEXTMODE_Y(c_min);
2138 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2139 }
2140 }
2141
2142 return;
2143 case GMODE_GRAPH:
2144 if (!full_update)
2145 return;
2146
2147 s->get_resolution(s, &width, &height);
2148 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2149 width, height);
2150 break;
2151 case GMODE_BLANK:
2152 default:
2153 if (!full_update)
2154 return;
2155
2156 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2157 break;
2158 }
2159
2160 /* Display a message */
2161 s->last_width = 60;
2162 s->last_height = height = 3;
2163 dpy_text_cursor(s->con, -1, -1);
2164 dpy_text_resize(s->con, s->last_width, height);
2165
2166 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2167 console_write_ch(dst ++, ' ');
2168
2169 size = strlen(msg_buffer);
2170 width = (s->last_width - size) / 2;
2171 dst = chardata + s->last_width + width;
2172 for (i = 0; i < size; i ++)
2173 console_write_ch(dst ++, 0x00200100 | msg_buffer[i]);
2174
2175 dpy_text_update(s->con, 0, 0, s->last_width, height);
2176 }
2177
2178 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2179 unsigned size)
2180 {
2181 VGACommonState *s = opaque;
2182
2183 return vga_mem_readb(s, addr);
2184 }
2185
2186 static void vga_mem_write(void *opaque, hwaddr addr,
2187 uint64_t data, unsigned size)
2188 {
2189 VGACommonState *s = opaque;
2190
2191 return vga_mem_writeb(s, addr, data);
2192 }
2193
2194 const MemoryRegionOps vga_mem_ops = {
2195 .read = vga_mem_read,
2196 .write = vga_mem_write,
2197 .endianness = DEVICE_LITTLE_ENDIAN,
2198 .impl = {
2199 .min_access_size = 1,
2200 .max_access_size = 1,
2201 },
2202 };
2203
2204 static int vga_common_post_load(void *opaque, int version_id)
2205 {
2206 VGACommonState *s = opaque;
2207
2208 /* force refresh */
2209 s->graphic_mode = -1;
2210 return 0;
2211 }
2212
2213 const VMStateDescription vmstate_vga_common = {
2214 .name = "vga",
2215 .version_id = 2,
2216 .minimum_version_id = 2,
2217 .minimum_version_id_old = 2,
2218 .post_load = vga_common_post_load,
2219 .fields = (VMStateField []) {
2220 VMSTATE_UINT32(latch, VGACommonState),
2221 VMSTATE_UINT8(sr_index, VGACommonState),
2222 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2223 VMSTATE_UINT8(gr_index, VGACommonState),
2224 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2225 VMSTATE_UINT8(ar_index, VGACommonState),
2226 VMSTATE_BUFFER(ar, VGACommonState),
2227 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2228 VMSTATE_UINT8(cr_index, VGACommonState),
2229 VMSTATE_BUFFER(cr, VGACommonState),
2230 VMSTATE_UINT8(msr, VGACommonState),
2231 VMSTATE_UINT8(fcr, VGACommonState),
2232 VMSTATE_UINT8(st00, VGACommonState),
2233 VMSTATE_UINT8(st01, VGACommonState),
2234
2235 VMSTATE_UINT8(dac_state, VGACommonState),
2236 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2237 VMSTATE_UINT8(dac_read_index, VGACommonState),
2238 VMSTATE_UINT8(dac_write_index, VGACommonState),
2239 VMSTATE_BUFFER(dac_cache, VGACommonState),
2240 VMSTATE_BUFFER(palette, VGACommonState),
2241
2242 VMSTATE_INT32(bank_offset, VGACommonState),
2243 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2244 VMSTATE_UINT16(vbe_index, VGACommonState),
2245 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2246 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2247 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2248 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2249 VMSTATE_END_OF_LIST()
2250 }
2251 };
2252
2253 static const GraphicHwOps vga_ops = {
2254 .invalidate = vga_invalidate_display,
2255 .gfx_update = vga_update_display,
2256 .text_update = vga_update_text,
2257 };
2258
2259 void vga_common_init(VGACommonState *s)
2260 {
2261 int i, j, v, b;
2262
2263 for(i = 0;i < 256; i++) {
2264 v = 0;
2265 for(j = 0; j < 8; j++) {
2266 v |= ((i >> j) & 1) << (j * 4);
2267 }
2268 expand4[i] = v;
2269
2270 v = 0;
2271 for(j = 0; j < 4; j++) {
2272 v |= ((i >> (2 * j)) & 3) << (j * 4);
2273 }
2274 expand2[i] = v;
2275 }
2276 for(i = 0; i < 16; i++) {
2277 v = 0;
2278 for(j = 0; j < 4; j++) {
2279 b = ((i >> j) & 1);
2280 v |= b << (2 * j);
2281 v |= b << (2 * j + 1);
2282 }
2283 expand4to8[i] = v;
2284 }
2285
2286 /* valid range: 1 MB -> 256 MB */
2287 s->vram_size = 1024 * 1024;
2288 while (s->vram_size < (s->vram_size_mb << 20) &&
2289 s->vram_size < (256 << 20)) {
2290 s->vram_size <<= 1;
2291 }
2292 s->vram_size_mb = s->vram_size >> 20;
2293
2294 s->is_vbe_vmstate = 1;
2295 memory_region_init_ram(&s->vram, "vga.vram", s->vram_size);
2296 vmstate_register_ram_global(&s->vram);
2297 xen_register_framebuffer(&s->vram);
2298 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2299 s->get_bpp = vga_get_bpp;
2300 s->get_offsets = vga_get_offsets;
2301 s->get_resolution = vga_get_resolution;
2302 s->hw_ops = &vga_ops;
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 }
QEMU Monitor Protocol