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vga: do not dynamically allocate chain4_alias
[qemu/kevin.git] / hw / display / vga.c
blob68cfee222a864540966a82eea461849ab360e797
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 hwaddr base, offset, size;
172
173 if (s->legacy_address_space == NULL) {
174 return;
175 }
176
177 if (s->has_chain4_alias) {
178 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
179 memory_region_destroy(&s->chain4_alias);
180 s->has_chain4_alias = false;
181 s->plane_updated = 0xf;
182 }
183 if ((s->sr[VGA_SEQ_PLANE_WRITE] & VGA_SR02_ALL_PLANES) ==
184 VGA_SR02_ALL_PLANES && s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
185 offset = 0;
186 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
187 case 0:
188 base = 0xa0000;
189 size = 0x20000;
190 break;
191 case 1:
192 base = 0xa0000;
193 size = 0x10000;
194 offset = s->bank_offset;
195 break;
196 case 2:
197 base = 0xb0000;
198 size = 0x8000;
199 break;
200 case 3:
201 default:
202 base = 0xb8000;
203 size = 0x8000;
204 break;
205 }
206 base += isa_mem_base;
207 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
208 "vga.chain4", &s->vram, offset, size);
209 memory_region_add_subregion_overlap(s->legacy_address_space, base,
210 &s->chain4_alias, 2);
211 s->has_chain4_alias = true;
212 }
213 }
214
215 static void vga_dumb_update_retrace_info(VGACommonState *s)
216 {
217 (void) s;
218 }
219
220 static void vga_precise_update_retrace_info(VGACommonState *s)
221 {
222 int htotal_chars;
223 int hretr_start_char;
224 int hretr_skew_chars;
225 int hretr_end_char;
226
227 int vtotal_lines;
228 int vretr_start_line;
229 int vretr_end_line;
230
231 int dots;
232 #if 0
233 int div2, sldiv2;
234 #endif
235 int clocking_mode;
236 int clock_sel;
237 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
238 int64_t chars_per_sec;
239 struct vga_precise_retrace *r = &s->retrace_info.precise;
240
241 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
242 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
243 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
244 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
245
246 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
247 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
248 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
249 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
250 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
251 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
252 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
253
254 clocking_mode = (s->sr[VGA_SEQ_CLOCK_MODE] >> 3) & 1;
255 clock_sel = (s->msr >> 2) & 3;
256 dots = (s->msr & 1) ? 8 : 9;
257
258 chars_per_sec = clk_hz[clock_sel] / dots;
259
260 htotal_chars <<= clocking_mode;
261
262 r->total_chars = vtotal_lines * htotal_chars;
263 if (r->freq) {
264 r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq);
265 } else {
266 r->ticks_per_char = get_ticks_per_sec() / chars_per_sec;
267 }
268
269 r->vstart = vretr_start_line;
270 r->vend = r->vstart + vretr_end_line + 1;
271
272 r->hstart = hretr_start_char + hretr_skew_chars;
273 r->hend = r->hstart + hretr_end_char + 1;
274 r->htotal = htotal_chars;
275
276 #if 0
277 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
278 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
279 printf (
280 "hz=%f\n"
281 "htotal = %d\n"
282 "hretr_start = %d\n"
283 "hretr_skew = %d\n"
284 "hretr_end = %d\n"
285 "vtotal = %d\n"
286 "vretr_start = %d\n"
287 "vretr_end = %d\n"
288 "div2 = %d sldiv2 = %d\n"
289 "clocking_mode = %d\n"
290 "clock_sel = %d %d\n"
291 "dots = %d\n"
292 "ticks/char = %" PRId64 "\n"
293 "\n",
294 (double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars),
295 htotal_chars,
296 hretr_start_char,
297 hretr_skew_chars,
298 hretr_end_char,
299 vtotal_lines,
300 vretr_start_line,
301 vretr_end_line,
302 div2, sldiv2,
303 clocking_mode,
304 clock_sel,
305 clk_hz[clock_sel],
306 dots,
307 r->ticks_per_char
308 );
309 #endif
310 }
311
312 static uint8_t vga_precise_retrace(VGACommonState *s)
313 {
314 struct vga_precise_retrace *r = &s->retrace_info.precise;
315 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
316
317 if (r->total_chars) {
318 int cur_line, cur_line_char, cur_char;
319 int64_t cur_tick;
320
321 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
322
323 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
324 cur_line = cur_char / r->htotal;
325
326 if (cur_line >= r->vstart && cur_line <= r->vend) {
327 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
328 } else {
329 cur_line_char = cur_char % r->htotal;
330 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
331 val |= ST01_DISP_ENABLE;
332 }
333 }
334
335 return val;
336 } else {
337 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
338 }
339 }
340
341 static uint8_t vga_dumb_retrace(VGACommonState *s)
342 {
343 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
344 }
345
346 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
347 {
348 if (s->msr & VGA_MIS_COLOR) {
349 /* Color */
350 return (addr >= 0x3b0 && addr <= 0x3bf);
351 } else {
352 /* Monochrome */
353 return (addr >= 0x3d0 && addr <= 0x3df);
354 }
355 }
356
357 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
358 {
359 VGACommonState *s = opaque;
360 int val, index;
361
362 if (vga_ioport_invalid(s, addr)) {
363 val = 0xff;
364 } else {
365 switch(addr) {
366 case VGA_ATT_W:
367 if (s->ar_flip_flop == 0) {
368 val = s->ar_index;
369 } else {
370 val = 0;
371 }
372 break;
373 case VGA_ATT_R:
374 index = s->ar_index & 0x1f;
375 if (index < VGA_ATT_C) {
376 val = s->ar[index];
377 } else {
378 val = 0;
379 }
380 break;
381 case VGA_MIS_W:
382 val = s->st00;
383 break;
384 case VGA_SEQ_I:
385 val = s->sr_index;
386 break;
387 case VGA_SEQ_D:
388 val = s->sr[s->sr_index];
389 #ifdef DEBUG_VGA_REG
390 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
391 #endif
392 break;
393 case VGA_PEL_IR:
394 val = s->dac_state;
395 break;
396 case VGA_PEL_IW:
397 val = s->dac_write_index;
398 break;
399 case VGA_PEL_D:
400 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
401 if (++s->dac_sub_index == 3) {
402 s->dac_sub_index = 0;
403 s->dac_read_index++;
404 }
405 break;
406 case VGA_FTC_R:
407 val = s->fcr;
408 break;
409 case VGA_MIS_R:
410 val = s->msr;
411 break;
412 case VGA_GFX_I:
413 val = s->gr_index;
414 break;
415 case VGA_GFX_D:
416 val = s->gr[s->gr_index];
417 #ifdef DEBUG_VGA_REG
418 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
419 #endif
420 break;
421 case VGA_CRT_IM:
422 case VGA_CRT_IC:
423 val = s->cr_index;
424 break;
425 case VGA_CRT_DM:
426 case VGA_CRT_DC:
427 val = s->cr[s->cr_index];
428 #ifdef DEBUG_VGA_REG
429 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
430 #endif
431 break;
432 case VGA_IS1_RM:
433 case VGA_IS1_RC:
434 /* just toggle to fool polling */
435 val = s->st01 = s->retrace(s);
436 s->ar_flip_flop = 0;
437 break;
438 default:
439 val = 0x00;
440 break;
441 }
442 }
443 #if defined(DEBUG_VGA)
444 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
445 #endif
446 return val;
447 }
448
449 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
450 {
451 VGACommonState *s = opaque;
452 int index;
453
454 /* check port range access depending on color/monochrome mode */
455 if (vga_ioport_invalid(s, addr)) {
456 return;
457 }
458 #ifdef DEBUG_VGA
459 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
460 #endif
461
462 switch(addr) {
463 case VGA_ATT_W:
464 if (s->ar_flip_flop == 0) {
465 val &= 0x3f;
466 s->ar_index = val;
467 } else {
468 index = s->ar_index & 0x1f;
469 switch(index) {
470 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
471 s->ar[index] = val & 0x3f;
472 break;
473 case VGA_ATC_MODE:
474 s->ar[index] = val & ~0x10;
475 break;
476 case VGA_ATC_OVERSCAN:
477 s->ar[index] = val;
478 break;
479 case VGA_ATC_PLANE_ENABLE:
480 s->ar[index] = val & ~0xc0;
481 break;
482 case VGA_ATC_PEL:
483 s->ar[index] = val & ~0xf0;
484 break;
485 case VGA_ATC_COLOR_PAGE:
486 s->ar[index] = val & ~0xf0;
487 break;
488 default:
489 break;
490 }
491 }
492 s->ar_flip_flop ^= 1;
493 break;
494 case VGA_MIS_W:
495 s->msr = val & ~0x10;
496 s->update_retrace_info(s);
497 break;
498 case VGA_SEQ_I:
499 s->sr_index = val & 7;
500 break;
501 case VGA_SEQ_D:
502 #ifdef DEBUG_VGA_REG
503 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
504 #endif
505 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
506 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
507 s->update_retrace_info(s);
508 }
509 vga_update_memory_access(s);
510 break;
511 case VGA_PEL_IR:
512 s->dac_read_index = val;
513 s->dac_sub_index = 0;
514 s->dac_state = 3;
515 break;
516 case VGA_PEL_IW:
517 s->dac_write_index = val;
518 s->dac_sub_index = 0;
519 s->dac_state = 0;
520 break;
521 case VGA_PEL_D:
522 s->dac_cache[s->dac_sub_index] = val;
523 if (++s->dac_sub_index == 3) {
524 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
525 s->dac_sub_index = 0;
526 s->dac_write_index++;
527 }
528 break;
529 case VGA_GFX_I:
530 s->gr_index = val & 0x0f;
531 break;
532 case VGA_GFX_D:
533 #ifdef DEBUG_VGA_REG
534 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
535 #endif
536 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
537 vga_update_memory_access(s);
538 break;
539 case VGA_CRT_IM:
540 case VGA_CRT_IC:
541 s->cr_index = val;
542 break;
543 case VGA_CRT_DM:
544 case VGA_CRT_DC:
545 #ifdef DEBUG_VGA_REG
546 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
547 #endif
548 /* handle CR0-7 protection */
549 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
550 s->cr_index <= VGA_CRTC_OVERFLOW) {
551 /* can always write bit 4 of CR7 */
552 if (s->cr_index == VGA_CRTC_OVERFLOW) {
553 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
554 (val & 0x10);
555 }
556 return;
557 }
558 s->cr[s->cr_index] = val;
559
560 switch(s->cr_index) {
561 case VGA_CRTC_H_TOTAL:
562 case VGA_CRTC_H_SYNC_START:
563 case VGA_CRTC_H_SYNC_END:
564 case VGA_CRTC_V_TOTAL:
565 case VGA_CRTC_OVERFLOW:
566 case VGA_CRTC_V_SYNC_END:
567 case VGA_CRTC_MODE:
568 s->update_retrace_info(s);
569 break;
570 }
571 break;
572 case VGA_IS1_RM:
573 case VGA_IS1_RC:
574 s->fcr = val & 0x10;
575 break;
576 }
577 }
578
579 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
580 {
581 VGACommonState *s = opaque;
582 uint32_t val;
583 val = s->vbe_index;
584 return val;
585 }
586
587 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
588 {
589 VGACommonState *s = opaque;
590 uint32_t val;
591
592 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
593 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
594 switch(s->vbe_index) {
595 /* XXX: do not hardcode ? */
596 case VBE_DISPI_INDEX_XRES:
597 val = VBE_DISPI_MAX_XRES;
598 break;
599 case VBE_DISPI_INDEX_YRES:
600 val = VBE_DISPI_MAX_YRES;
601 break;
602 case VBE_DISPI_INDEX_BPP:
603 val = VBE_DISPI_MAX_BPP;
604 break;
605 default:
606 val = s->vbe_regs[s->vbe_index];
607 break;
608 }
609 } else {
610 val = s->vbe_regs[s->vbe_index];
611 }
612 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
613 val = s->vram_size / (64 * 1024);
614 } else {
615 val = 0;
616 }
617 #ifdef DEBUG_BOCHS_VBE
618 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
619 #endif
620 return val;
621 }
622
623 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
624 {
625 VGACommonState *s = opaque;
626 s->vbe_index = val;
627 }
628
629 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
630 {
631 VGACommonState *s = opaque;
632
633 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
634 #ifdef DEBUG_BOCHS_VBE
635 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
636 #endif
637 switch(s->vbe_index) {
638 case VBE_DISPI_INDEX_ID:
639 if (val == VBE_DISPI_ID0 ||
640 val == VBE_DISPI_ID1 ||
641 val == VBE_DISPI_ID2 ||
642 val == VBE_DISPI_ID3 ||
643 val == VBE_DISPI_ID4) {
644 s->vbe_regs[s->vbe_index] = val;
645 }
646 break;
647 case VBE_DISPI_INDEX_XRES:
648 if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
649 s->vbe_regs[s->vbe_index] = val;
650 }
651 break;
652 case VBE_DISPI_INDEX_YRES:
653 if (val <= VBE_DISPI_MAX_YRES) {
654 s->vbe_regs[s->vbe_index] = val;
655 }
656 break;
657 case VBE_DISPI_INDEX_BPP:
658 if (val == 0)
659 val = 8;
660 if (val == 4 || val == 8 || val == 15 ||
661 val == 16 || val == 24 || val == 32) {
662 s->vbe_regs[s->vbe_index] = val;
663 }
664 break;
665 case VBE_DISPI_INDEX_BANK:
666 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
667 val &= (s->vbe_bank_mask >> 2);
668 } else {
669 val &= s->vbe_bank_mask;
670 }
671 s->vbe_regs[s->vbe_index] = val;
672 s->bank_offset = (val << 16);
673 vga_update_memory_access(s);
674 break;
675 case VBE_DISPI_INDEX_ENABLE:
676 if ((val & VBE_DISPI_ENABLED) &&
677 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
678 int h, shift_control;
679
680 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
681 s->vbe_regs[VBE_DISPI_INDEX_XRES];
682 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
683 s->vbe_regs[VBE_DISPI_INDEX_YRES];
684 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
685 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
686
687 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
688 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
689 else
690 s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
691 ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
692 s->vbe_start_addr = 0;
693
694 /* clear the screen (should be done in BIOS) */
695 if (!(val & VBE_DISPI_NOCLEARMEM)) {
696 memset(s->vram_ptr, 0,
697 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
698 }
699
700 /* we initialize the VGA graphic mode (should be done
701 in BIOS) */
702 /* graphic mode + memory map 1 */
703 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
704 VGA_GR06_GRAPHICS_MODE;
705 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
706 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
707 /* width */
708 s->cr[VGA_CRTC_H_DISP] =
709 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
710 /* height (only meaningful if < 1024) */
711 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
712 s->cr[VGA_CRTC_V_DISP_END] = h;
713 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
714 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
715 /* line compare to 1023 */
716 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
717 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
718 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
719
720 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
721 shift_control = 0;
722 s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
723 } else {
724 shift_control = 2;
725 /* set chain 4 mode */
726 s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
727 /* activate all planes */
728 s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
729 }
730 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
731 (shift_control << 5);
732 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
733 } else {
734 /* XXX: the bios should do that */
735 s->bank_offset = 0;
736 }
737 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
738 s->vbe_regs[s->vbe_index] = val;
739 vga_update_memory_access(s);
740 break;
741 case VBE_DISPI_INDEX_VIRT_WIDTH:
742 {
743 int w, h, line_offset;
744
745 if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
746 return;
747 w = val;
748 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
749 line_offset = w >> 1;
750 else
751 line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
752 h = s->vram_size / line_offset;
753 /* XXX: support weird bochs semantics ? */
754 if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
755 return;
756 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
757 s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
758 s->vbe_line_offset = line_offset;
759 }
760 break;
761 case VBE_DISPI_INDEX_X_OFFSET:
762 case VBE_DISPI_INDEX_Y_OFFSET:
763 {
764 int x;
765 s->vbe_regs[s->vbe_index] = val;
766 s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
767 x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
768 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
769 s->vbe_start_addr += x >> 1;
770 else
771 s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
772 s->vbe_start_addr >>= 2;
773 }
774 break;
775 default:
776 break;
777 }
778 }
779 }
780
781 /* called for accesses between 0xa0000 and 0xc0000 */
782 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
783 {
784 int memory_map_mode, plane;
785 uint32_t ret;
786
787 /* convert to VGA memory offset */
788 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
789 addr &= 0x1ffff;
790 switch(memory_map_mode) {
791 case 0:
792 break;
793 case 1:
794 if (addr >= 0x10000)
795 return 0xff;
796 addr += s->bank_offset;
797 break;
798 case 2:
799 addr -= 0x10000;
800 if (addr >= 0x8000)
801 return 0xff;
802 break;
803 default:
804 case 3:
805 addr -= 0x18000;
806 if (addr >= 0x8000)
807 return 0xff;
808 break;
809 }
810
811 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
812 /* chain 4 mode : simplest access */
813 ret = s->vram_ptr[addr];
814 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
815 /* odd/even mode (aka text mode mapping) */
816 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
817 ret = s->vram_ptr[((addr & ~1) << 1) | plane];
818 } else {
819 /* standard VGA latched access */
820 s->latch = ((uint32_t *)s->vram_ptr)[addr];
821
822 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
823 /* read mode 0 */
824 plane = s->gr[VGA_GFX_PLANE_READ];
825 ret = GET_PLANE(s->latch, plane);
826 } else {
827 /* read mode 1 */
828 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
829 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
830 ret |= ret >> 16;
831 ret |= ret >> 8;
832 ret = (~ret) & 0xff;
833 }
834 }
835 return ret;
836 }
837
838 /* called for accesses between 0xa0000 and 0xc0000 */
839 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
840 {
841 int memory_map_mode, plane, write_mode, b, func_select, mask;
842 uint32_t write_mask, bit_mask, set_mask;
843
844 #ifdef DEBUG_VGA_MEM
845 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
846 #endif
847 /* convert to VGA memory offset */
848 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
849 addr &= 0x1ffff;
850 switch(memory_map_mode) {
851 case 0:
852 break;
853 case 1:
854 if (addr >= 0x10000)
855 return;
856 addr += s->bank_offset;
857 break;
858 case 2:
859 addr -= 0x10000;
860 if (addr >= 0x8000)
861 return;
862 break;
863 default:
864 case 3:
865 addr -= 0x18000;
866 if (addr >= 0x8000)
867 return;
868 break;
869 }
870
871 if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
872 /* chain 4 mode : simplest access */
873 plane = addr & 3;
874 mask = (1 << plane);
875 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
876 s->vram_ptr[addr] = val;
877 #ifdef DEBUG_VGA_MEM
878 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
879 #endif
880 s->plane_updated |= mask; /* only used to detect font change */
881 memory_region_set_dirty(&s->vram, addr, 1);
882 }
883 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
884 /* odd/even mode (aka text mode mapping) */
885 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
886 mask = (1 << plane);
887 if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
888 addr = ((addr & ~1) << 1) | plane;
889 s->vram_ptr[addr] = val;
890 #ifdef DEBUG_VGA_MEM
891 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
892 #endif
893 s->plane_updated |= mask; /* only used to detect font change */
894 memory_region_set_dirty(&s->vram, addr, 1);
895 }
896 } else {
897 /* standard VGA latched access */
898 write_mode = s->gr[VGA_GFX_MODE] & 3;
899 switch(write_mode) {
900 default:
901 case 0:
902 /* rotate */
903 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
904 val = ((val >> b) | (val << (8 - b))) & 0xff;
905 val |= val << 8;
906 val |= val << 16;
907
908 /* apply set/reset mask */
909 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
910 val = (val & ~set_mask) |
911 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
912 bit_mask = s->gr[VGA_GFX_BIT_MASK];
913 break;
914 case 1:
915 val = s->latch;
916 goto do_write;
917 case 2:
918 val = mask16[val & 0x0f];
919 bit_mask = s->gr[VGA_GFX_BIT_MASK];
920 break;
921 case 3:
922 /* rotate */
923 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
924 val = (val >> b) | (val << (8 - b));
925
926 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
927 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
928 break;
929 }
930
931 /* apply logical operation */
932 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
933 switch(func_select) {
934 case 0:
935 default:
936 /* nothing to do */
937 break;
938 case 1:
939 /* and */
940 val &= s->latch;
941 break;
942 case 2:
943 /* or */
944 val |= s->latch;
945 break;
946 case 3:
947 /* xor */
948 val ^= s->latch;
949 break;
950 }
951
952 /* apply bit mask */
953 bit_mask |= bit_mask << 8;
954 bit_mask |= bit_mask << 16;
955 val = (val & bit_mask) | (s->latch & ~bit_mask);
956
957 do_write:
958 /* mask data according to sr[2] */
959 mask = s->sr[VGA_SEQ_PLANE_WRITE];
960 s->plane_updated |= mask; /* only used to detect font change */
961 write_mask = mask16[mask];
962 ((uint32_t *)s->vram_ptr)[addr] =
963 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
964 (val & write_mask);
965 #ifdef DEBUG_VGA_MEM
966 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
967 addr * 4, write_mask, val);
968 #endif
969 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
970 }
971 }
972
973 typedef void vga_draw_glyph8_func(uint8_t *d, int linesize,
974 const uint8_t *font_ptr, int h,
975 uint32_t fgcol, uint32_t bgcol);
976 typedef void vga_draw_glyph9_func(uint8_t *d, int linesize,
977 const uint8_t *font_ptr, int h,
978 uint32_t fgcol, uint32_t bgcol, int dup9);
979 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
980 const uint8_t *s, int width);
981
982 #define DEPTH 8
983 #include "vga_template.h"
984
985 #define DEPTH 15
986 #include "vga_template.h"
987
988 #define BGR_FORMAT
989 #define DEPTH 15
990 #include "vga_template.h"
991
992 #define DEPTH 16
993 #include "vga_template.h"
994
995 #define BGR_FORMAT
996 #define DEPTH 16
997 #include "vga_template.h"
998
999 #define DEPTH 32
1000 #include "vga_template.h"
1001
1002 #define BGR_FORMAT
1003 #define DEPTH 32
1004 #include "vga_template.h"
1005
1006 static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b)
1007 {
1008 unsigned int col;
1009 col = rgb_to_pixel8(r, g, b);
1010 col |= col << 8;
1011 col |= col << 16;
1012 return col;
1013 }
1014
1015 static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b)
1016 {
1017 unsigned int col;
1018 col = rgb_to_pixel15(r, g, b);
1019 col |= col << 16;
1020 return col;
1021 }
1022
1023 static unsigned int rgb_to_pixel15bgr_dup(unsigned int r, unsigned int g,
1024 unsigned int b)
1025 {
1026 unsigned int col;
1027 col = rgb_to_pixel15bgr(r, g, b);
1028 col |= col << 16;
1029 return col;
1030 }
1031
1032 static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b)
1033 {
1034 unsigned int col;
1035 col = rgb_to_pixel16(r, g, b);
1036 col |= col << 16;
1037 return col;
1038 }
1039
1040 static unsigned int rgb_to_pixel16bgr_dup(unsigned int r, unsigned int g,
1041 unsigned int b)
1042 {
1043 unsigned int col;
1044 col = rgb_to_pixel16bgr(r, g, b);
1045 col |= col << 16;
1046 return col;
1047 }
1048
1049 static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b)
1050 {
1051 unsigned int col;
1052 col = rgb_to_pixel32(r, g, b);
1053 return col;
1054 }
1055
1056 static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
1057 {
1058 unsigned int col;
1059 col = rgb_to_pixel32bgr(r, g, b);
1060 return col;
1061 }
1062
1063 /* return true if the palette was modified */
1064 static int update_palette16(VGACommonState *s)
1065 {
1066 int full_update, i;
1067 uint32_t v, col, *palette;
1068
1069 full_update = 0;
1070 palette = s->last_palette;
1071 for(i = 0; i < 16; i++) {
1072 v = s->ar[i];
1073 if (s->ar[VGA_ATC_MODE] & 0x80) {
1074 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1075 } else {
1076 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1077 }
1078 v = v * 3;
1079 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1080 c6_to_8(s->palette[v + 1]),
1081 c6_to_8(s->palette[v + 2]));
1082 if (col != palette[i]) {
1083 full_update = 1;
1084 palette[i] = col;
1085 }
1086 }
1087 return full_update;
1088 }
1089
1090 /* return true if the palette was modified */
1091 static int update_palette256(VGACommonState *s)
1092 {
1093 int full_update, i;
1094 uint32_t v, col, *palette;
1095
1096 full_update = 0;
1097 palette = s->last_palette;
1098 v = 0;
1099 for(i = 0; i < 256; i++) {
1100 if (s->dac_8bit) {
1101 col = s->rgb_to_pixel(s->palette[v],
1102 s->palette[v + 1],
1103 s->palette[v + 2]);
1104 } else {
1105 col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
1106 c6_to_8(s->palette[v + 1]),
1107 c6_to_8(s->palette[v + 2]));
1108 }
1109 if (col != palette[i]) {
1110 full_update = 1;
1111 palette[i] = col;
1112 }
1113 v += 3;
1114 }
1115 return full_update;
1116 }
1117
1118 static void vga_get_offsets(VGACommonState *s,
1119 uint32_t *pline_offset,
1120 uint32_t *pstart_addr,
1121 uint32_t *pline_compare)
1122 {
1123 uint32_t start_addr, line_offset, line_compare;
1124
1125 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1126 line_offset = s->vbe_line_offset;
1127 start_addr = s->vbe_start_addr;
1128 line_compare = 65535;
1129 } else {
1130 /* compute line_offset in bytes */
1131 line_offset = s->cr[VGA_CRTC_OFFSET];
1132 line_offset <<= 3;
1133
1134 /* starting address */
1135 start_addr = s->cr[VGA_CRTC_START_LO] |
1136 (s->cr[VGA_CRTC_START_HI] << 8);
1137
1138 /* line compare */
1139 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1140 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1141 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1142 }
1143 *pline_offset = line_offset;
1144 *pstart_addr = start_addr;
1145 *pline_compare = line_compare;
1146 }
1147
1148 /* update start_addr and line_offset. Return TRUE if modified */
1149 static int update_basic_params(VGACommonState *s)
1150 {
1151 int full_update;
1152 uint32_t start_addr, line_offset, line_compare;
1153
1154 full_update = 0;
1155
1156 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1157
1158 if (line_offset != s->line_offset ||
1159 start_addr != s->start_addr ||
1160 line_compare != s->line_compare) {
1161 s->line_offset = line_offset;
1162 s->start_addr = start_addr;
1163 s->line_compare = line_compare;
1164 full_update = 1;
1165 }
1166 return full_update;
1167 }
1168
1169 #define NB_DEPTHS 7
1170
1171 static inline int get_depth_index(DisplaySurface *s)
1172 {
1173 switch (surface_bits_per_pixel(s)) {
1174 default:
1175 case 8:
1176 return 0;
1177 case 15:
1178 return 1;
1179 case 16:
1180 return 2;
1181 case 32:
1182 if (is_surface_bgr(s)) {
1183 return 4;
1184 } else {
1185 return 3;
1186 }
1187 }
1188 }
1189
1190 static vga_draw_glyph8_func * const vga_draw_glyph8_table[NB_DEPTHS] = {
1191 vga_draw_glyph8_8,
1192 vga_draw_glyph8_16,
1193 vga_draw_glyph8_16,
1194 vga_draw_glyph8_32,
1195 vga_draw_glyph8_32,
1196 vga_draw_glyph8_16,
1197 vga_draw_glyph8_16,
1198 };
1199
1200 static vga_draw_glyph8_func * const vga_draw_glyph16_table[NB_DEPTHS] = {
1201 vga_draw_glyph16_8,
1202 vga_draw_glyph16_16,
1203 vga_draw_glyph16_16,
1204 vga_draw_glyph16_32,
1205 vga_draw_glyph16_32,
1206 vga_draw_glyph16_16,
1207 vga_draw_glyph16_16,
1208 };
1209
1210 static vga_draw_glyph9_func * const vga_draw_glyph9_table[NB_DEPTHS] = {
1211 vga_draw_glyph9_8,
1212 vga_draw_glyph9_16,
1213 vga_draw_glyph9_16,
1214 vga_draw_glyph9_32,
1215 vga_draw_glyph9_32,
1216 vga_draw_glyph9_16,
1217 vga_draw_glyph9_16,
1218 };
1219
1220 static const uint8_t cursor_glyph[32 * 4] = {
1221 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1222 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1223 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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 };
1238
1239 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1240 int *pcwidth, int *pcheight)
1241 {
1242 int width, cwidth, height, cheight;
1243
1244 /* total width & height */
1245 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1246 cwidth = 8;
1247 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
1248 cwidth = 9;
1249 }
1250 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
1251 cwidth = 16; /* NOTE: no 18 pixel wide */
1252 }
1253 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1254 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1255 /* ugly hack for CGA 160x100x16 - explain me the logic */
1256 height = 100;
1257 } else {
1258 height = s->cr[VGA_CRTC_V_DISP_END] |
1259 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1260 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1261 height = (height + 1) / cheight;
1262 }
1263
1264 *pwidth = width;
1265 *pheight = height;
1266 *pcwidth = cwidth;
1267 *pcheight = cheight;
1268 }
1269
1270 typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
1271
1272 static rgb_to_pixel_dup_func * const rgb_to_pixel_dup_table[NB_DEPTHS] = {
1273 rgb_to_pixel8_dup,
1274 rgb_to_pixel15_dup,
1275 rgb_to_pixel16_dup,
1276 rgb_to_pixel32_dup,
1277 rgb_to_pixel32bgr_dup,
1278 rgb_to_pixel15bgr_dup,
1279 rgb_to_pixel16bgr_dup,
1280 };
1281
1282 /*
1283 * Text mode update
1284 * Missing:
1285 * - double scan
1286 * - double width
1287 * - underline
1288 * - flashing
1289 */
1290 static void vga_draw_text(VGACommonState *s, int full_update)
1291 {
1292 DisplaySurface *surface = qemu_console_surface(s->con);
1293 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1294 int cx_min, cx_max, linesize, x_incr, line, line1;
1295 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1296 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1297 const uint8_t *font_ptr, *font_base[2];
1298 int dup9, line_offset, depth_index;
1299 uint32_t *palette;
1300 uint32_t *ch_attr_ptr;
1301 vga_draw_glyph8_func *vga_draw_glyph8;
1302 vga_draw_glyph9_func *vga_draw_glyph9;
1303 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1304
1305 /* compute font data address (in plane 2) */
1306 v = s->sr[VGA_SEQ_CHARACTER_MAP];
1307 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1308 if (offset != s->font_offsets[0]) {
1309 s->font_offsets[0] = offset;
1310 full_update = 1;
1311 }
1312 font_base[0] = s->vram_ptr + offset;
1313
1314 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1315 font_base[1] = s->vram_ptr + offset;
1316 if (offset != s->font_offsets[1]) {
1317 s->font_offsets[1] = offset;
1318 full_update = 1;
1319 }
1320 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1321 /* if the plane 2 was modified since the last display, it
1322 indicates the font may have been modified */
1323 s->plane_updated = 0;
1324 full_update = 1;
1325 }
1326 full_update |= update_basic_params(s);
1327
1328 line_offset = s->line_offset;
1329
1330 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1331 if ((height * width) <= 1) {
1332 /* better than nothing: exit if transient size is too small */
1333 return;
1334 }
1335 if ((height * width) > CH_ATTR_SIZE) {
1336 /* better than nothing: exit if transient size is too big */
1337 return;
1338 }
1339
1340 if (width != s->last_width || height != s->last_height ||
1341 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1342 s->last_scr_width = width * cw;
1343 s->last_scr_height = height * cheight;
1344 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1345 surface = qemu_console_surface(s->con);
1346 dpy_text_resize(s->con, width, height);
1347 s->last_depth = 0;
1348 s->last_width = width;
1349 s->last_height = height;
1350 s->last_ch = cheight;
1351 s->last_cw = cw;
1352 full_update = 1;
1353 }
1354 s->rgb_to_pixel =
1355 rgb_to_pixel_dup_table[get_depth_index(surface)];
1356 full_update |= update_palette16(s);
1357 palette = s->last_palette;
1358 x_incr = cw * surface_bytes_per_pixel(surface);
1359
1360 if (full_update) {
1361 s->full_update_text = 1;
1362 }
1363 if (s->full_update_gfx) {
1364 s->full_update_gfx = 0;
1365 full_update |= 1;
1366 }
1367
1368 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1369 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1370 if (cursor_offset != s->cursor_offset ||
1371 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1372 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1373 /* if the cursor position changed, we update the old and new
1374 chars */
1375 if (s->cursor_offset < CH_ATTR_SIZE)
1376 s->last_ch_attr[s->cursor_offset] = -1;
1377 if (cursor_offset < CH_ATTR_SIZE)
1378 s->last_ch_attr[cursor_offset] = -1;
1379 s->cursor_offset = cursor_offset;
1380 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1381 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1382 }
1383 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1384 if (now >= s->cursor_blink_time) {
1385 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1386 s->cursor_visible_phase = !s->cursor_visible_phase;
1387 }
1388
1389 depth_index = get_depth_index(surface);
1390 if (cw == 16)
1391 vga_draw_glyph8 = vga_draw_glyph16_table[depth_index];
1392 else
1393 vga_draw_glyph8 = vga_draw_glyph8_table[depth_index];
1394 vga_draw_glyph9 = vga_draw_glyph9_table[depth_index];
1395
1396 dest = surface_data(surface);
1397 linesize = surface_stride(surface);
1398 ch_attr_ptr = s->last_ch_attr;
1399 line = 0;
1400 offset = s->start_addr * 4;
1401 for(cy = 0; cy < height; cy++) {
1402 d1 = dest;
1403 src = s->vram_ptr + offset;
1404 cx_min = width;
1405 cx_max = -1;
1406 for(cx = 0; cx < width; cx++) {
1407 ch_attr = *(uint16_t *)src;
1408 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1409 if (cx < cx_min)
1410 cx_min = cx;
1411 if (cx > cx_max)
1412 cx_max = cx;
1413 *ch_attr_ptr = ch_attr;
1414 #ifdef HOST_WORDS_BIGENDIAN
1415 ch = ch_attr >> 8;
1416 cattr = ch_attr & 0xff;
1417 #else
1418 ch = ch_attr & 0xff;
1419 cattr = ch_attr >> 8;
1420 #endif
1421 font_ptr = font_base[(cattr >> 3) & 1];
1422 font_ptr += 32 * 4 * ch;
1423 bgcol = palette[cattr >> 4];
1424 fgcol = palette[cattr & 0x0f];
1425 if (cw != 9) {
1426 vga_draw_glyph8(d1, linesize,
1427 font_ptr, cheight, fgcol, bgcol);
1428 } else {
1429 dup9 = 0;
1430 if (ch >= 0xb0 && ch <= 0xdf &&
1431 (s->ar[VGA_ATC_MODE] & 0x04)) {
1432 dup9 = 1;
1433 }
1434 vga_draw_glyph9(d1, linesize,
1435 font_ptr, cheight, fgcol, bgcol, dup9);
1436 }
1437 if (src == cursor_ptr &&
1438 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1439 s->cursor_visible_phase) {
1440 int line_start, line_last, h;
1441 /* draw the cursor */
1442 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1443 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1444 /* XXX: check that */
1445 if (line_last > cheight - 1)
1446 line_last = cheight - 1;
1447 if (line_last >= line_start && line_start < cheight) {
1448 h = line_last - line_start + 1;
1449 d = d1 + linesize * line_start;
1450 if (cw != 9) {
1451 vga_draw_glyph8(d, linesize,
1452 cursor_glyph, h, fgcol, bgcol);
1453 } else {
1454 vga_draw_glyph9(d, linesize,
1455 cursor_glyph, h, fgcol, bgcol, 1);
1456 }
1457 }
1458 }
1459 }
1460 d1 += x_incr;
1461 src += 4;
1462 ch_attr_ptr++;
1463 }
1464 if (cx_max != -1) {
1465 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1466 (cx_max - cx_min + 1) * cw, cheight);
1467 }
1468 dest += linesize * cheight;
1469 line1 = line + cheight;
1470 offset += line_offset;
1471 if (line < s->line_compare && line1 >= s->line_compare) {
1472 offset = 0;
1473 }
1474 line = line1;
1475 }
1476 }
1477
1478 enum {
1479 VGA_DRAW_LINE2,
1480 VGA_DRAW_LINE2D2,
1481 VGA_DRAW_LINE4,
1482 VGA_DRAW_LINE4D2,
1483 VGA_DRAW_LINE8D2,
1484 VGA_DRAW_LINE8,
1485 VGA_DRAW_LINE15,
1486 VGA_DRAW_LINE16,
1487 VGA_DRAW_LINE24,
1488 VGA_DRAW_LINE32,
1489 VGA_DRAW_LINE_NB,
1490 };
1491
1492 static vga_draw_line_func * const vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
1493 vga_draw_line2_8,
1494 vga_draw_line2_16,
1495 vga_draw_line2_16,
1496 vga_draw_line2_32,
1497 vga_draw_line2_32,
1498 vga_draw_line2_16,
1499 vga_draw_line2_16,
1500
1501 vga_draw_line2d2_8,
1502 vga_draw_line2d2_16,
1503 vga_draw_line2d2_16,
1504 vga_draw_line2d2_32,
1505 vga_draw_line2d2_32,
1506 vga_draw_line2d2_16,
1507 vga_draw_line2d2_16,
1508
1509 vga_draw_line4_8,
1510 vga_draw_line4_16,
1511 vga_draw_line4_16,
1512 vga_draw_line4_32,
1513 vga_draw_line4_32,
1514 vga_draw_line4_16,
1515 vga_draw_line4_16,
1516
1517 vga_draw_line4d2_8,
1518 vga_draw_line4d2_16,
1519 vga_draw_line4d2_16,
1520 vga_draw_line4d2_32,
1521 vga_draw_line4d2_32,
1522 vga_draw_line4d2_16,
1523 vga_draw_line4d2_16,
1524
1525 vga_draw_line8d2_8,
1526 vga_draw_line8d2_16,
1527 vga_draw_line8d2_16,
1528 vga_draw_line8d2_32,
1529 vga_draw_line8d2_32,
1530 vga_draw_line8d2_16,
1531 vga_draw_line8d2_16,
1532
1533 vga_draw_line8_8,
1534 vga_draw_line8_16,
1535 vga_draw_line8_16,
1536 vga_draw_line8_32,
1537 vga_draw_line8_32,
1538 vga_draw_line8_16,
1539 vga_draw_line8_16,
1540
1541 vga_draw_line15_8,
1542 vga_draw_line15_15,
1543 vga_draw_line15_16,
1544 vga_draw_line15_32,
1545 vga_draw_line15_32bgr,
1546 vga_draw_line15_15bgr,
1547 vga_draw_line15_16bgr,
1548
1549 vga_draw_line16_8,
1550 vga_draw_line16_15,
1551 vga_draw_line16_16,
1552 vga_draw_line16_32,
1553 vga_draw_line16_32bgr,
1554 vga_draw_line16_15bgr,
1555 vga_draw_line16_16bgr,
1556
1557 vga_draw_line24_8,
1558 vga_draw_line24_15,
1559 vga_draw_line24_16,
1560 vga_draw_line24_32,
1561 vga_draw_line24_32bgr,
1562 vga_draw_line24_15bgr,
1563 vga_draw_line24_16bgr,
1564
1565 vga_draw_line32_8,
1566 vga_draw_line32_15,
1567 vga_draw_line32_16,
1568 vga_draw_line32_32,
1569 vga_draw_line32_32bgr,
1570 vga_draw_line32_15bgr,
1571 vga_draw_line32_16bgr,
1572 };
1573
1574 static int vga_get_bpp(VGACommonState *s)
1575 {
1576 int ret;
1577
1578 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1579 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1580 } else {
1581 ret = 0;
1582 }
1583 return ret;
1584 }
1585
1586 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1587 {
1588 int width, height;
1589
1590 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
1591 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1592 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1593 } else {
1594 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1595 height = s->cr[VGA_CRTC_V_DISP_END] |
1596 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1597 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1598 height = (height + 1);
1599 }
1600 *pwidth = width;
1601 *pheight = height;
1602 }
1603
1604 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1605 {
1606 int y;
1607 if (y1 >= VGA_MAX_HEIGHT)
1608 return;
1609 if (y2 >= VGA_MAX_HEIGHT)
1610 y2 = VGA_MAX_HEIGHT;
1611 for(y = y1; y < y2; y++) {
1612 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1613 }
1614 }
1615
1616 void vga_sync_dirty_bitmap(VGACommonState *s)
1617 {
1618 memory_region_sync_dirty_bitmap(&s->vram);
1619 }
1620
1621 void vga_dirty_log_start(VGACommonState *s)
1622 {
1623 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1624 }
1625
1626 void vga_dirty_log_stop(VGACommonState *s)
1627 {
1628 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1629 }
1630
1631 /*
1632 * graphic modes
1633 */
1634 static void vga_draw_graphic(VGACommonState *s, int full_update)
1635 {
1636 DisplaySurface *surface = qemu_console_surface(s->con);
1637 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1638 int width, height, shift_control, line_offset, bwidth, bits;
1639 ram_addr_t page0, page1, page_min, page_max;
1640 int disp_width, multi_scan, multi_run;
1641 uint8_t *d;
1642 uint32_t v, addr1, addr;
1643 vga_draw_line_func *vga_draw_line;
1644 #if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
1645 static const bool byteswap = false;
1646 #else
1647 static const bool byteswap = true;
1648 #endif
1649
1650 full_update |= update_basic_params(s);
1651
1652 if (!full_update)
1653 vga_sync_dirty_bitmap(s);
1654
1655 s->get_resolution(s, &width, &height);
1656 disp_width = width;
1657
1658 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1659 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1660 if (shift_control != 1) {
1661 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1662 - 1;
1663 } else {
1664 /* in CGA modes, multi_scan is ignored */
1665 /* XXX: is it correct ? */
1666 multi_scan = double_scan;
1667 }
1668 multi_run = multi_scan;
1669 if (shift_control != s->shift_control ||
1670 double_scan != s->double_scan) {
1671 full_update = 1;
1672 s->shift_control = shift_control;
1673 s->double_scan = double_scan;
1674 }
1675
1676 if (shift_control == 0) {
1677 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1678 disp_width <<= 1;
1679 }
1680 } else if (shift_control == 1) {
1681 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1682 disp_width <<= 1;
1683 }
1684 }
1685
1686 depth = s->get_bpp(s);
1687 if (s->line_offset != s->last_line_offset ||
1688 disp_width != s->last_width ||
1689 height != s->last_height ||
1690 s->last_depth != depth) {
1691 if (depth == 32 || (depth == 16 && !byteswap)) {
1692 surface = qemu_create_displaysurface_from(disp_width,
1693 height, depth, s->line_offset,
1694 s->vram_ptr + (s->start_addr * 4), byteswap);
1695 dpy_gfx_replace_surface(s->con, surface);
1696 } else {
1697 qemu_console_resize(s->con, disp_width, height);
1698 surface = qemu_console_surface(s->con);
1699 }
1700 s->last_scr_width = disp_width;
1701 s->last_scr_height = height;
1702 s->last_width = disp_width;
1703 s->last_height = height;
1704 s->last_line_offset = s->line_offset;
1705 s->last_depth = depth;
1706 full_update = 1;
1707 } else if (is_buffer_shared(surface) &&
1708 (full_update || surface_data(surface) != s->vram_ptr
1709 + (s->start_addr * 4))) {
1710 surface = qemu_create_displaysurface_from(disp_width,
1711 height, depth, s->line_offset,
1712 s->vram_ptr + (s->start_addr * 4), byteswap);
1713 dpy_gfx_replace_surface(s->con, surface);
1714 }
1715
1716 s->rgb_to_pixel =
1717 rgb_to_pixel_dup_table[get_depth_index(surface)];
1718
1719 if (shift_control == 0) {
1720 full_update |= update_palette16(s);
1721 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1722 v = VGA_DRAW_LINE4D2;
1723 } else {
1724 v = VGA_DRAW_LINE4;
1725 }
1726 bits = 4;
1727 } else if (shift_control == 1) {
1728 full_update |= update_palette16(s);
1729 if (s->sr[VGA_SEQ_CLOCK_MODE] & 8) {
1730 v = VGA_DRAW_LINE2D2;
1731 } else {
1732 v = VGA_DRAW_LINE2;
1733 }
1734 bits = 4;
1735 } else {
1736 switch(s->get_bpp(s)) {
1737 default:
1738 case 0:
1739 full_update |= update_palette256(s);
1740 v = VGA_DRAW_LINE8D2;
1741 bits = 4;
1742 break;
1743 case 8:
1744 full_update |= update_palette256(s);
1745 v = VGA_DRAW_LINE8;
1746 bits = 8;
1747 break;
1748 case 15:
1749 v = VGA_DRAW_LINE15;
1750 bits = 16;
1751 break;
1752 case 16:
1753 v = VGA_DRAW_LINE16;
1754 bits = 16;
1755 break;
1756 case 24:
1757 v = VGA_DRAW_LINE24;
1758 bits = 24;
1759 break;
1760 case 32:
1761 v = VGA_DRAW_LINE32;
1762 bits = 32;
1763 break;
1764 }
1765 }
1766 vga_draw_line = vga_draw_line_table[v * NB_DEPTHS +
1767 get_depth_index(surface)];
1768
1769 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1770 s->cursor_invalidate(s);
1771 }
1772
1773 line_offset = s->line_offset;
1774 #if 0
1775 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",
1776 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1777 s->line_compare, s->sr[VGA_SEQ_CLOCK_MODE]);
1778 #endif
1779 addr1 = (s->start_addr * 4);
1780 bwidth = (width * bits + 7) / 8;
1781 y_start = -1;
1782 page_min = -1;
1783 page_max = 0;
1784 d = surface_data(surface);
1785 linesize = surface_stride(surface);
1786 y1 = 0;
1787 for(y = 0; y < height; y++) {
1788 addr = addr1;
1789 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1790 int shift;
1791 /* CGA compatibility handling */
1792 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1793 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1794 }
1795 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1796 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1797 }
1798 update = full_update;
1799 page0 = addr;
1800 page1 = addr + bwidth - 1;
1801 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
1802 DIRTY_MEMORY_VGA);
1803 /* explicit invalidation for the hardware cursor */
1804 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1805 if (update) {
1806 if (y_start < 0)
1807 y_start = y;
1808 if (page0 < page_min)
1809 page_min = page0;
1810 if (page1 > page_max)
1811 page_max = page1;
1812 if (!(is_buffer_shared(surface))) {
1813 vga_draw_line(s, d, s->vram_ptr + addr, width);
1814 if (s->cursor_draw_line)
1815 s->cursor_draw_line(s, d, y);
1816 }
1817 } else {
1818 if (y_start >= 0) {
1819 /* flush to display */
1820 dpy_gfx_update(s->con, 0, y_start,
1821 disp_width, y - y_start);
1822 y_start = -1;
1823 }
1824 }
1825 if (!multi_run) {
1826 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1827 if ((y1 & mask) == mask)
1828 addr1 += line_offset;
1829 y1++;
1830 multi_run = multi_scan;
1831 } else {
1832 multi_run--;
1833 }
1834 /* line compare acts on the displayed lines */
1835 if (y == s->line_compare)
1836 addr1 = 0;
1837 d += linesize;
1838 }
1839 if (y_start >= 0) {
1840 /* flush to display */
1841 dpy_gfx_update(s->con, 0, y_start,
1842 disp_width, y - y_start);
1843 }
1844 /* reset modified pages */
1845 if (page_max >= page_min) {
1846 memory_region_reset_dirty(&s->vram,
1847 page_min,
1848 page_max - page_min,
1849 DIRTY_MEMORY_VGA);
1850 }
1851 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1852 }
1853
1854 static void vga_draw_blank(VGACommonState *s, int full_update)
1855 {
1856 DisplaySurface *surface = qemu_console_surface(s->con);
1857 int i, w, val;
1858 uint8_t *d;
1859
1860 if (!full_update)
1861 return;
1862 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1863 return;
1864
1865 s->rgb_to_pixel =
1866 rgb_to_pixel_dup_table[get_depth_index(surface)];
1867 if (surface_bits_per_pixel(surface) == 8) {
1868 val = s->rgb_to_pixel(0, 0, 0);
1869 } else {
1870 val = 0;
1871 }
1872 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1873 d = surface_data(surface);
1874 for(i = 0; i < s->last_scr_height; i++) {
1875 memset(d, val, w);
1876 d += surface_stride(surface);
1877 }
1878 dpy_gfx_update(s->con, 0, 0,
1879 s->last_scr_width, s->last_scr_height);
1880 }
1881
1882 #define GMODE_TEXT 0
1883 #define GMODE_GRAPH 1
1884 #define GMODE_BLANK 2
1885
1886 static void vga_update_display(void *opaque)
1887 {
1888 VGACommonState *s = opaque;
1889 DisplaySurface *surface = qemu_console_surface(s->con);
1890 int full_update, graphic_mode;
1891
1892 qemu_flush_coalesced_mmio_buffer();
1893
1894 if (surface_bits_per_pixel(surface) == 0) {
1895 /* nothing to do */
1896 } else {
1897 full_update = 0;
1898 if (!(s->ar_index & 0x20)) {
1899 graphic_mode = GMODE_BLANK;
1900 } else {
1901 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1902 }
1903 if (graphic_mode != s->graphic_mode) {
1904 s->graphic_mode = graphic_mode;
1905 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1906 full_update = 1;
1907 }
1908 switch(graphic_mode) {
1909 case GMODE_TEXT:
1910 vga_draw_text(s, full_update);
1911 break;
1912 case GMODE_GRAPH:
1913 vga_draw_graphic(s, full_update);
1914 break;
1915 case GMODE_BLANK:
1916 default:
1917 vga_draw_blank(s, full_update);
1918 break;
1919 }
1920 }
1921 }
1922
1923 /* force a full display refresh */
1924 static void vga_invalidate_display(void *opaque)
1925 {
1926 VGACommonState *s = opaque;
1927
1928 s->last_width = -1;
1929 s->last_height = -1;
1930 }
1931
1932 void vga_common_reset(VGACommonState *s)
1933 {
1934 s->sr_index = 0;
1935 memset(s->sr, '\0', sizeof(s->sr));
1936 s->gr_index = 0;
1937 memset(s->gr, '\0', sizeof(s->gr));
1938 s->ar_index = 0;
1939 memset(s->ar, '\0', sizeof(s->ar));
1940 s->ar_flip_flop = 0;
1941 s->cr_index = 0;
1942 memset(s->cr, '\0', sizeof(s->cr));
1943 s->msr = 0;
1944 s->fcr = 0;
1945 s->st00 = 0;
1946 s->st01 = 0;
1947 s->dac_state = 0;
1948 s->dac_sub_index = 0;
1949 s->dac_read_index = 0;
1950 s->dac_write_index = 0;
1951 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1952 s->dac_8bit = 0;
1953 memset(s->palette, '\0', sizeof(s->palette));
1954 s->bank_offset = 0;
1955 s->vbe_index = 0;
1956 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1957 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1958 s->vbe_start_addr = 0;
1959 s->vbe_line_offset = 0;
1960 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1961 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1962 s->graphic_mode = -1; /* force full update */
1963 s->shift_control = 0;
1964 s->double_scan = 0;
1965 s->line_offset = 0;
1966 s->line_compare = 0;
1967 s->start_addr = 0;
1968 s->plane_updated = 0;
1969 s->last_cw = 0;
1970 s->last_ch = 0;
1971 s->last_width = 0;
1972 s->last_height = 0;
1973 s->last_scr_width = 0;
1974 s->last_scr_height = 0;
1975 s->cursor_start = 0;
1976 s->cursor_end = 0;
1977 s->cursor_offset = 0;
1978 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1979 memset(s->last_palette, '\0', sizeof(s->last_palette));
1980 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1981 switch (vga_retrace_method) {
1982 case VGA_RETRACE_DUMB:
1983 break;
1984 case VGA_RETRACE_PRECISE:
1985 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1986 break;
1987 }
1988 vga_update_memory_access(s);
1989 }
1990
1991 static void vga_reset(void *opaque)
1992 {
1993 VGACommonState *s = opaque;
1994 vga_common_reset(s);
1995 }
1996
1997 #define TEXTMODE_X(x) ((x) % width)
1998 #define TEXTMODE_Y(x) ((x) / width)
1999 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
2000 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
2001 /* relay text rendering to the display driver
2002 * instead of doing a full vga_update_display() */
2003 static void vga_update_text(void *opaque, console_ch_t *chardata)
2004 {
2005 VGACommonState *s = opaque;
2006 int graphic_mode, i, cursor_offset, cursor_visible;
2007 int cw, cheight, width, height, size, c_min, c_max;
2008 uint32_t *src;
2009 console_ch_t *dst, val;
2010 char msg_buffer[80];
2011 int full_update = 0;
2012
2013 qemu_flush_coalesced_mmio_buffer();
2014
2015 if (!(s->ar_index & 0x20)) {
2016 graphic_mode = GMODE_BLANK;
2017 } else {
2018 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
2019 }
2020 if (graphic_mode != s->graphic_mode) {
2021 s->graphic_mode = graphic_mode;
2022 full_update = 1;
2023 }
2024 if (s->last_width == -1) {
2025 s->last_width = 0;
2026 full_update = 1;
2027 }
2028
2029 switch (graphic_mode) {
2030 case GMODE_TEXT:
2031 /* TODO: update palette */
2032 full_update |= update_basic_params(s);
2033
2034 /* total width & height */
2035 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
2036 cw = 8;
2037 if (!(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) {
2038 cw = 9;
2039 }
2040 if (s->sr[VGA_SEQ_CLOCK_MODE] & 0x08) {
2041 cw = 16; /* NOTE: no 18 pixel wide */
2042 }
2043 width = (s->cr[VGA_CRTC_H_DISP] + 1);
2044 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
2045 /* ugly hack for CGA 160x100x16 - explain me the logic */
2046 height = 100;
2047 } else {
2048 height = s->cr[VGA_CRTC_V_DISP_END] |
2049 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
2050 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
2051 height = (height + 1) / cheight;
2052 }
2053
2054 size = (height * width);
2055 if (size > CH_ATTR_SIZE) {
2056 if (!full_update)
2057 return;
2058
2059 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
2060 width, height);
2061 break;
2062 }
2063
2064 if (width != s->last_width || height != s->last_height ||
2065 cw != s->last_cw || cheight != s->last_ch) {
2066 s->last_scr_width = width * cw;
2067 s->last_scr_height = height * cheight;
2068 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
2069 dpy_text_resize(s->con, width, height);
2070 s->last_depth = 0;
2071 s->last_width = width;
2072 s->last_height = height;
2073 s->last_ch = cheight;
2074 s->last_cw = cw;
2075 full_update = 1;
2076 }
2077
2078 if (full_update) {
2079 s->full_update_gfx = 1;
2080 }
2081 if (s->full_update_text) {
2082 s->full_update_text = 0;
2083 full_update |= 1;
2084 }
2085
2086 /* Update "hardware" cursor */
2087 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
2088 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
2089 if (cursor_offset != s->cursor_offset ||
2090 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
2091 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
2092 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
2093 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
2094 dpy_text_cursor(s->con,
2095 TEXTMODE_X(cursor_offset),
2096 TEXTMODE_Y(cursor_offset));
2097 else
2098 dpy_text_cursor(s->con, -1, -1);
2099 s->cursor_offset = cursor_offset;
2100 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
2101 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
2102 }
2103
2104 src = (uint32_t *) s->vram_ptr + s->start_addr;
2105 dst = chardata;
2106
2107 if (full_update) {
2108 for (i = 0; i < size; src ++, dst ++, i ++)
2109 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
2110
2111 dpy_text_update(s->con, 0, 0, width, height);
2112 } else {
2113 c_max = 0;
2114
2115 for (i = 0; i < size; src ++, dst ++, i ++) {
2116 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2117 if (*dst != val) {
2118 *dst = val;
2119 c_max = i;
2120 break;
2121 }
2122 }
2123 c_min = i;
2124 for (; i < size; src ++, dst ++, i ++) {
2125 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2126 if (*dst != val) {
2127 *dst = val;
2128 c_max = i;
2129 }
2130 }
2131
2132 if (c_min <= c_max) {
2133 i = TEXTMODE_Y(c_min);
2134 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2135 }
2136 }
2137
2138 return;
2139 case GMODE_GRAPH:
2140 if (!full_update)
2141 return;
2142
2143 s->get_resolution(s, &width, &height);
2144 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2145 width, height);
2146 break;
2147 case GMODE_BLANK:
2148 default:
2149 if (!full_update)
2150 return;
2151
2152 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2153 break;
2154 }
2155
2156 /* Display a message */
2157 s->last_width = 60;
2158 s->last_height = height = 3;
2159 dpy_text_cursor(s->con, -1, -1);
2160 dpy_text_resize(s->con, s->last_width, height);
2161
2162 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2163 console_write_ch(dst ++, ' ');
2164
2165 size = strlen(msg_buffer);
2166 width = (s->last_width - size) / 2;
2167 dst = chardata + s->last_width + width;
2168 for (i = 0; i < size; i ++)
2169 console_write_ch(dst ++, 0x00200100 | msg_buffer[i]);
2170
2171 dpy_text_update(s->con, 0, 0, s->last_width, height);
2172 }
2173
2174 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2175 unsigned size)
2176 {
2177 VGACommonState *s = opaque;
2178
2179 return vga_mem_readb(s, addr);
2180 }
2181
2182 static void vga_mem_write(void *opaque, hwaddr addr,
2183 uint64_t data, unsigned size)
2184 {
2185 VGACommonState *s = opaque;
2186
2187 return vga_mem_writeb(s, addr, data);
2188 }
2189
2190 const MemoryRegionOps vga_mem_ops = {
2191 .read = vga_mem_read,
2192 .write = vga_mem_write,
2193 .endianness = DEVICE_LITTLE_ENDIAN,
2194 .impl = {
2195 .min_access_size = 1,
2196 .max_access_size = 1,
2197 },
2198 };
2199
2200 static int vga_common_post_load(void *opaque, int version_id)
2201 {
2202 VGACommonState *s = opaque;
2203
2204 /* force refresh */
2205 s->graphic_mode = -1;
2206 return 0;
2207 }
2208
2209 const VMStateDescription vmstate_vga_common = {
2210 .name = "vga",
2211 .version_id = 2,
2212 .minimum_version_id = 2,
2213 .post_load = vga_common_post_load,
2214 .fields = (VMStateField[]) {
2215 VMSTATE_UINT32(latch, VGACommonState),
2216 VMSTATE_UINT8(sr_index, VGACommonState),
2217 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2218 VMSTATE_UINT8(gr_index, VGACommonState),
2219 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2220 VMSTATE_UINT8(ar_index, VGACommonState),
2221 VMSTATE_BUFFER(ar, VGACommonState),
2222 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2223 VMSTATE_UINT8(cr_index, VGACommonState),
2224 VMSTATE_BUFFER(cr, VGACommonState),
2225 VMSTATE_UINT8(msr, VGACommonState),
2226 VMSTATE_UINT8(fcr, VGACommonState),
2227 VMSTATE_UINT8(st00, VGACommonState),
2228 VMSTATE_UINT8(st01, VGACommonState),
2229
2230 VMSTATE_UINT8(dac_state, VGACommonState),
2231 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2232 VMSTATE_UINT8(dac_read_index, VGACommonState),
2233 VMSTATE_UINT8(dac_write_index, VGACommonState),
2234 VMSTATE_BUFFER(dac_cache, VGACommonState),
2235 VMSTATE_BUFFER(palette, VGACommonState),
2236
2237 VMSTATE_INT32(bank_offset, VGACommonState),
2238 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2239 VMSTATE_UINT16(vbe_index, VGACommonState),
2240 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2241 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2242 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2243 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2244 VMSTATE_END_OF_LIST()
2245 }
2246 };
2247
2248 static const GraphicHwOps vga_ops = {
2249 .invalidate = vga_invalidate_display,
2250 .gfx_update = vga_update_display,
2251 .text_update = vga_update_text,
2252 };
2253
2254 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2255 {
2256 int i, j, v, b;
2257
2258 for(i = 0;i < 256; i++) {
2259 v = 0;
2260 for(j = 0; j < 8; j++) {
2261 v |= ((i >> j) & 1) << (j * 4);
2262 }
2263 expand4[i] = v;
2264
2265 v = 0;
2266 for(j = 0; j < 4; j++) {
2267 v |= ((i >> (2 * j)) & 3) << (j * 4);
2268 }
2269 expand2[i] = v;
2270 }
2271 for(i = 0; i < 16; i++) {
2272 v = 0;
2273 for(j = 0; j < 4; j++) {
2274 b = ((i >> j) & 1);
2275 v |= b << (2 * j);
2276 v |= b << (2 * j + 1);
2277 }
2278 expand4to8[i] = v;
2279 }
2280
2281 /* valid range: 1 MB -> 256 MB */
2282 s->vram_size = 1024 * 1024;
2283 while (s->vram_size < (s->vram_size_mb << 20) &&
2284 s->vram_size < (256 << 20)) {
2285 s->vram_size <<= 1;
2286 }
2287 s->vram_size_mb = s->vram_size >> 20;
2288
2289 s->is_vbe_vmstate = 1;
2290 memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size);
2291 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2292 xen_register_framebuffer(&s->vram);
2293 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2294 s->get_bpp = vga_get_bpp;
2295 s->get_offsets = vga_get_offsets;
2296 s->get_resolution = vga_get_resolution;
2297 s->hw_ops = &vga_ops;
2298 switch (vga_retrace_method) {
2299 case VGA_RETRACE_DUMB:
2300 s->retrace = vga_dumb_retrace;
2301 s->update_retrace_info = vga_dumb_update_retrace_info;
2302 break;
2303
2304 case VGA_RETRACE_PRECISE:
2305 s->retrace = vga_precise_retrace;
2306 s->update_retrace_info = vga_precise_update_retrace_info;
2307 break;
2308 }
2309 vga_dirty_log_start(s);
2310 }
2311
2312 static const MemoryRegionPortio vga_portio_list[] = {
2313 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2314 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2315 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2316 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2317 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2318 PORTIO_END_OF_LIST(),
2319 };
2320
2321 static const MemoryRegionPortio vbe_portio_list[] = {
2322 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2323 # ifdef TARGET_I386
2324 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2325 # endif
2326 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2327 PORTIO_END_OF_LIST(),
2328 };
2329
2330 /* Used by both ISA and PCI */
2331 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2332 const MemoryRegionPortio **vga_ports,
2333 const MemoryRegionPortio **vbe_ports)
2334 {
2335 MemoryRegion *vga_mem;
2336
2337 *vga_ports = vga_portio_list;
2338 *vbe_ports = vbe_portio_list;
2339
2340 vga_mem = g_malloc(sizeof(*vga_mem));
2341 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2342 "vga-lowmem", 0x20000);
2343 memory_region_set_flush_coalesced(vga_mem);
2344
2345 return vga_mem;
2346 }
2347
2348 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2349 MemoryRegion *address_space_io, bool init_vga_ports)
2350 {
2351 MemoryRegion *vga_io_memory;
2352 const MemoryRegionPortio *vga_ports, *vbe_ports;
2353
2354 qemu_register_reset(vga_reset, s);
2355
2356 s->bank_offset = 0;
2357
2358 s->legacy_address_space = address_space;
2359
2360 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2361 memory_region_add_subregion_overlap(address_space,
2362 isa_mem_base + 0x000a0000,
2363 vga_io_memory,
2364 1);
2365 memory_region_set_coalescing(vga_io_memory);
2366 if (init_vga_ports) {
2367 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2368 portio_list_set_flush_coalesced(&s->vga_port_list);
2369 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2370 }
2371 if (vbe_ports) {
2372 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2373 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2374 }
2375 }
2376
2377 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2378 {
2379 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2380 * so use an alias to avoid double-mapping the same region.
2381 */
2382 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2383 &s->vram, 0, memory_region_size(&s->vram));
2384 /* XXX: use optimized standard vga accesses */
2385 memory_region_add_subregion(system_memory,
2386 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2387 &s->vram_vbe);
2388 s->vbe_mapped = 1;
2389 }
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