]> git.proxmox.com Git - mirror_qemu.git/blob - hw/display/vga.c
projects / mirror_qemu.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging
[mirror_qemu.git] / hw / display / vga.c
1 /*
2 * QEMU VGA Emulator.
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "hw/hw.h"
27 #include "hw/display/vga.h"
28 #include "hw/pci/pci.h"
29 #include "vga_int.h"
30 #include "vga_regs.h"
31 #include "ui/pixel_ops.h"
32 #include "qemu/timer.h"
33 #include "hw/xen/xen.h"
34 #include "trace.h"
35
36 //#define DEBUG_VGA_MEM
37 //#define DEBUG_VGA_REG
38
39 /* 16 state changes per vertical frame @60 Hz */
40 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
41
42 /*
43 * Video Graphics Array (VGA)
44 *
45 * Chipset docs for original IBM VGA:
46 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
47 *
48 * FreeVGA site:
49 * http://www.osdever.net/FreeVGA/home.htm
50 *
51 * Standard VGA features and Bochs VBE extensions are implemented.
52 */
53
54 /* force some bits to zero */
55 const uint8_t sr_mask[8] = {
56 0x03,
57 0x3d,
58 0x0f,
59 0x3f,
60 0x0e,
61 0x00,
62 0x00,
63 0xff,
64 };
65
66 const uint8_t gr_mask[16] = {
67 0x0f, /* 0x00 */
68 0x0f, /* 0x01 */
69 0x0f, /* 0x02 */
70 0x1f, /* 0x03 */
71 0x03, /* 0x04 */
72 0x7b, /* 0x05 */
73 0x0f, /* 0x06 */
74 0x0f, /* 0x07 */
75 0xff, /* 0x08 */
76 0x00, /* 0x09 */
77 0x00, /* 0x0a */
78 0x00, /* 0x0b */
79 0x00, /* 0x0c */
80 0x00, /* 0x0d */
81 0x00, /* 0x0e */
82 0x00, /* 0x0f */
83 };
84
85 #define cbswap_32(__x) \
86 ((uint32_t)( \
87 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
88 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
89 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
90 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
91
92 #ifdef HOST_WORDS_BIGENDIAN
93 #define PAT(x) cbswap_32(x)
94 #else
95 #define PAT(x) (x)
96 #endif
97
98 #ifdef HOST_WORDS_BIGENDIAN
99 #define BIG 1
100 #else
101 #define BIG 0
102 #endif
103
104 #ifdef HOST_WORDS_BIGENDIAN
105 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
106 #else
107 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
108 #endif
109
110 static const uint32_t mask16[16] = {
111 PAT(0x00000000),
112 PAT(0x000000ff),
113 PAT(0x0000ff00),
114 PAT(0x0000ffff),
115 PAT(0x00ff0000),
116 PAT(0x00ff00ff),
117 PAT(0x00ffff00),
118 PAT(0x00ffffff),
119 PAT(0xff000000),
120 PAT(0xff0000ff),
121 PAT(0xff00ff00),
122 PAT(0xff00ffff),
123 PAT(0xffff0000),
124 PAT(0xffff00ff),
125 PAT(0xffffff00),
126 PAT(0xffffffff),
127 };
128
129 #undef PAT
130
131 #ifdef HOST_WORDS_BIGENDIAN
132 #define PAT(x) (x)
133 #else
134 #define PAT(x) cbswap_32(x)
135 #endif
136
137 static uint32_t expand4[256];
138 static uint16_t expand2[256];
139 static uint8_t expand4to8[16];
140
141 static void vbe_update_vgaregs(VGACommonState *s);
142
143 static inline bool vbe_enabled(VGACommonState *s)
144 {
145 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
146 }
147
148 static inline uint8_t sr(VGACommonState *s, int idx)
149 {
150 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
151 }
152
153 static void vga_update_memory_access(VGACommonState *s)
154 {
155 hwaddr base, offset, size;
156
157 if (s->legacy_address_space == NULL) {
158 return;
159 }
160
161 if (s->has_chain4_alias) {
162 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
163 object_unparent(OBJECT(&s->chain4_alias));
164 s->has_chain4_alias = false;
165 s->plane_updated = 0xf;
166 }
167 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
168 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
169 offset = 0;
170 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
171 case 0:
172 base = 0xa0000;
173 size = 0x20000;
174 break;
175 case 1:
176 base = 0xa0000;
177 size = 0x10000;
178 offset = s->bank_offset;
179 break;
180 case 2:
181 base = 0xb0000;
182 size = 0x8000;
183 break;
184 case 3:
185 default:
186 base = 0xb8000;
187 size = 0x8000;
188 break;
189 }
190 assert(offset + size <= s->vram_size);
191 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
192 "vga.chain4", &s->vram, offset, size);
193 memory_region_add_subregion_overlap(s->legacy_address_space, base,
194 &s->chain4_alias, 2);
195 s->has_chain4_alias = true;
196 }
197 }
198
199 static void vga_dumb_update_retrace_info(VGACommonState *s)
200 {
201 (void) s;
202 }
203
204 static void vga_precise_update_retrace_info(VGACommonState *s)
205 {
206 int htotal_chars;
207 int hretr_start_char;
208 int hretr_skew_chars;
209 int hretr_end_char;
210
211 int vtotal_lines;
212 int vretr_start_line;
213 int vretr_end_line;
214
215 int dots;
216 #if 0
217 int div2, sldiv2;
218 #endif
219 int clocking_mode;
220 int clock_sel;
221 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
222 int64_t chars_per_sec;
223 struct vga_precise_retrace *r = &s->retrace_info.precise;
224
225 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
226 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
227 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
228 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
229
230 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
231 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
232 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
233 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
234 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
235 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
236 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
237
238 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
239 clock_sel = (s->msr >> 2) & 3;
240 dots = (s->msr & 1) ? 8 : 9;
241
242 chars_per_sec = clk_hz[clock_sel] / dots;
243
244 htotal_chars <<= clocking_mode;
245
246 r->total_chars = vtotal_lines * htotal_chars;
247 if (r->freq) {
248 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
249 } else {
250 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
251 }
252
253 r->vstart = vretr_start_line;
254 r->vend = r->vstart + vretr_end_line + 1;
255
256 r->hstart = hretr_start_char + hretr_skew_chars;
257 r->hend = r->hstart + hretr_end_char + 1;
258 r->htotal = htotal_chars;
259
260 #if 0
261 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
262 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
263 printf (
264 "hz=%f\n"
265 "htotal = %d\n"
266 "hretr_start = %d\n"
267 "hretr_skew = %d\n"
268 "hretr_end = %d\n"
269 "vtotal = %d\n"
270 "vretr_start = %d\n"
271 "vretr_end = %d\n"
272 "div2 = %d sldiv2 = %d\n"
273 "clocking_mode = %d\n"
274 "clock_sel = %d %d\n"
275 "dots = %d\n"
276 "ticks/char = %" PRId64 "\n"
277 "\n",
278 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
279 htotal_chars,
280 hretr_start_char,
281 hretr_skew_chars,
282 hretr_end_char,
283 vtotal_lines,
284 vretr_start_line,
285 vretr_end_line,
286 div2, sldiv2,
287 clocking_mode,
288 clock_sel,
289 clk_hz[clock_sel],
290 dots,
291 r->ticks_per_char
292 );
293 #endif
294 }
295
296 static uint8_t vga_precise_retrace(VGACommonState *s)
297 {
298 struct vga_precise_retrace *r = &s->retrace_info.precise;
299 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
300
301 if (r->total_chars) {
302 int cur_line, cur_line_char, cur_char;
303 int64_t cur_tick;
304
305 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
306
307 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
308 cur_line = cur_char / r->htotal;
309
310 if (cur_line >= r->vstart && cur_line <= r->vend) {
311 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
312 } else {
313 cur_line_char = cur_char % r->htotal;
314 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
315 val |= ST01_DISP_ENABLE;
316 }
317 }
318
319 return val;
320 } else {
321 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
322 }
323 }
324
325 static uint8_t vga_dumb_retrace(VGACommonState *s)
326 {
327 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
328 }
329
330 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
331 {
332 if (s->msr & VGA_MIS_COLOR) {
333 /* Color */
334 return (addr >= 0x3b0 && addr <= 0x3bf);
335 } else {
336 /* Monochrome */
337 return (addr >= 0x3d0 && addr <= 0x3df);
338 }
339 }
340
341 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
342 {
343 VGACommonState *s = opaque;
344 int val, index;
345
346 if (vga_ioport_invalid(s, addr)) {
347 val = 0xff;
348 } else {
349 switch(addr) {
350 case VGA_ATT_W:
351 if (s->ar_flip_flop == 0) {
352 val = s->ar_index;
353 } else {
354 val = 0;
355 }
356 break;
357 case VGA_ATT_R:
358 index = s->ar_index & 0x1f;
359 if (index < VGA_ATT_C) {
360 val = s->ar[index];
361 } else {
362 val = 0;
363 }
364 break;
365 case VGA_MIS_W:
366 val = s->st00;
367 break;
368 case VGA_SEQ_I:
369 val = s->sr_index;
370 break;
371 case VGA_SEQ_D:
372 val = s->sr[s->sr_index];
373 #ifdef DEBUG_VGA_REG
374 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
375 #endif
376 break;
377 case VGA_PEL_IR:
378 val = s->dac_state;
379 break;
380 case VGA_PEL_IW:
381 val = s->dac_write_index;
382 break;
383 case VGA_PEL_D:
384 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
385 if (++s->dac_sub_index == 3) {
386 s->dac_sub_index = 0;
387 s->dac_read_index++;
388 }
389 break;
390 case VGA_FTC_R:
391 val = s->fcr;
392 break;
393 case VGA_MIS_R:
394 val = s->msr;
395 break;
396 case VGA_GFX_I:
397 val = s->gr_index;
398 break;
399 case VGA_GFX_D:
400 val = s->gr[s->gr_index];
401 #ifdef DEBUG_VGA_REG
402 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
403 #endif
404 break;
405 case VGA_CRT_IM:
406 case VGA_CRT_IC:
407 val = s->cr_index;
408 break;
409 case VGA_CRT_DM:
410 case VGA_CRT_DC:
411 val = s->cr[s->cr_index];
412 #ifdef DEBUG_VGA_REG
413 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
414 #endif
415 break;
416 case VGA_IS1_RM:
417 case VGA_IS1_RC:
418 /* just toggle to fool polling */
419 val = s->st01 = s->retrace(s);
420 s->ar_flip_flop = 0;
421 break;
422 default:
423 val = 0x00;
424 break;
425 }
426 }
427 trace_vga_std_read_io(addr, val);
428 return val;
429 }
430
431 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
432 {
433 VGACommonState *s = opaque;
434 int index;
435
436 /* check port range access depending on color/monochrome mode */
437 if (vga_ioport_invalid(s, addr)) {
438 return;
439 }
440 trace_vga_std_write_io(addr, val);
441
442 switch(addr) {
443 case VGA_ATT_W:
444 if (s->ar_flip_flop == 0) {
445 val &= 0x3f;
446 s->ar_index = val;
447 } else {
448 index = s->ar_index & 0x1f;
449 switch(index) {
450 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
451 s->ar[index] = val & 0x3f;
452 break;
453 case VGA_ATC_MODE:
454 s->ar[index] = val & ~0x10;
455 break;
456 case VGA_ATC_OVERSCAN:
457 s->ar[index] = val;
458 break;
459 case VGA_ATC_PLANE_ENABLE:
460 s->ar[index] = val & ~0xc0;
461 break;
462 case VGA_ATC_PEL:
463 s->ar[index] = val & ~0xf0;
464 break;
465 case VGA_ATC_COLOR_PAGE:
466 s->ar[index] = val & ~0xf0;
467 break;
468 default:
469 break;
470 }
471 }
472 s->ar_flip_flop ^= 1;
473 break;
474 case VGA_MIS_W:
475 s->msr = val & ~0x10;
476 s->update_retrace_info(s);
477 break;
478 case VGA_SEQ_I:
479 s->sr_index = val & 7;
480 break;
481 case VGA_SEQ_D:
482 #ifdef DEBUG_VGA_REG
483 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
484 #endif
485 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
486 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
487 s->update_retrace_info(s);
488 }
489 vga_update_memory_access(s);
490 break;
491 case VGA_PEL_IR:
492 s->dac_read_index = val;
493 s->dac_sub_index = 0;
494 s->dac_state = 3;
495 break;
496 case VGA_PEL_IW:
497 s->dac_write_index = val;
498 s->dac_sub_index = 0;
499 s->dac_state = 0;
500 break;
501 case VGA_PEL_D:
502 s->dac_cache[s->dac_sub_index] = val;
503 if (++s->dac_sub_index == 3) {
504 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
505 s->dac_sub_index = 0;
506 s->dac_write_index++;
507 }
508 break;
509 case VGA_GFX_I:
510 s->gr_index = val & 0x0f;
511 break;
512 case VGA_GFX_D:
513 #ifdef DEBUG_VGA_REG
514 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
515 #endif
516 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
517 vbe_update_vgaregs(s);
518 vga_update_memory_access(s);
519 break;
520 case VGA_CRT_IM:
521 case VGA_CRT_IC:
522 s->cr_index = val;
523 break;
524 case VGA_CRT_DM:
525 case VGA_CRT_DC:
526 #ifdef DEBUG_VGA_REG
527 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
528 #endif
529 /* handle CR0-7 protection */
530 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
531 s->cr_index <= VGA_CRTC_OVERFLOW) {
532 /* can always write bit 4 of CR7 */
533 if (s->cr_index == VGA_CRTC_OVERFLOW) {
534 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
535 (val & 0x10);
536 vbe_update_vgaregs(s);
537 }
538 return;
539 }
540 s->cr[s->cr_index] = val;
541 vbe_update_vgaregs(s);
542
543 switch(s->cr_index) {
544 case VGA_CRTC_H_TOTAL:
545 case VGA_CRTC_H_SYNC_START:
546 case VGA_CRTC_H_SYNC_END:
547 case VGA_CRTC_V_TOTAL:
548 case VGA_CRTC_OVERFLOW:
549 case VGA_CRTC_V_SYNC_END:
550 case VGA_CRTC_MODE:
551 s->update_retrace_info(s);
552 break;
553 }
554 break;
555 case VGA_IS1_RM:
556 case VGA_IS1_RC:
557 s->fcr = val & 0x10;
558 break;
559 }
560 }
561
562 /*
563 * Sanity check vbe register writes.
564 *
565 * As we don't have a way to signal errors to the guest in the bochs
566 * dispi interface we'll go adjust the registers to the closest valid
567 * value.
568 */
569 static void vbe_fixup_regs(VGACommonState *s)
570 {
571 uint16_t *r = s->vbe_regs;
572 uint32_t bits, linelength, maxy, offset;
573
574 if (!vbe_enabled(s)) {
575 /* vbe is turned off -- nothing to do */
576 return;
577 }
578
579 /* check depth */
580 switch (r[VBE_DISPI_INDEX_BPP]) {
581 case 4:
582 case 8:
583 case 16:
584 case 24:
585 case 32:
586 bits = r[VBE_DISPI_INDEX_BPP];
587 break;
588 case 15:
589 bits = 16;
590 break;
591 default:
592 bits = r[VBE_DISPI_INDEX_BPP] = 8;
593 break;
594 }
595
596 /* check width */
597 r[VBE_DISPI_INDEX_XRES] &= ~7u;
598 if (r[VBE_DISPI_INDEX_XRES] == 0) {
599 r[VBE_DISPI_INDEX_XRES] = 8;
600 }
601 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
602 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
603 }
604 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
605 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
606 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
607 }
608 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
609 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
610 }
611
612 /* check height */
613 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
614 maxy = s->vbe_size / linelength;
615 if (r[VBE_DISPI_INDEX_YRES] == 0) {
616 r[VBE_DISPI_INDEX_YRES] = 1;
617 }
618 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
619 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
620 }
621 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
622 r[VBE_DISPI_INDEX_YRES] = maxy;
623 }
624
625 /* check offset */
626 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
627 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
628 }
629 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
630 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
631 }
632 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
633 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
634 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
635 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
636 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
637 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
638 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
639 offset = 0;
640 }
641 }
642
643 /* update vga state */
644 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
645 s->vbe_line_offset = linelength;
646 s->vbe_start_addr = offset / 4;
647 }
648
649 /* we initialize the VGA graphic mode */
650 static void vbe_update_vgaregs(VGACommonState *s)
651 {
652 int h, shift_control;
653
654 if (!vbe_enabled(s)) {
655 /* vbe is turned off -- nothing to do */
656 return;
657 }
658
659 /* graphic mode + memory map 1 */
660 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
661 VGA_GR06_GRAPHICS_MODE;
662 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
663 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
664 /* width */
665 s->cr[VGA_CRTC_H_DISP] =
666 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
667 /* height (only meaningful if < 1024) */
668 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
669 s->cr[VGA_CRTC_V_DISP_END] = h;
670 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
671 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
672 /* line compare to 1023 */
673 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
674 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
675 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
676
677 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
678 shift_control = 0;
679 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
680 } else {
681 shift_control = 2;
682 /* set chain 4 mode */
683 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
684 /* activate all planes */
685 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
686 }
687 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
688 (shift_control << 5);
689 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
690 }
691
692 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
693 {
694 VGACommonState *s = opaque;
695 return s->vbe_index;
696 }
697
698 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
699 {
700 VGACommonState *s = opaque;
701 uint32_t val;
702
703 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
704 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
705 switch(s->vbe_index) {
706 /* XXX: do not hardcode ? */
707 case VBE_DISPI_INDEX_XRES:
708 val = VBE_DISPI_MAX_XRES;
709 break;
710 case VBE_DISPI_INDEX_YRES:
711 val = VBE_DISPI_MAX_YRES;
712 break;
713 case VBE_DISPI_INDEX_BPP:
714 val = VBE_DISPI_MAX_BPP;
715 break;
716 default:
717 val = s->vbe_regs[s->vbe_index];
718 break;
719 }
720 } else {
721 val = s->vbe_regs[s->vbe_index];
722 }
723 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
724 val = s->vbe_size / (64 * 1024);
725 } else {
726 val = 0;
727 }
728 trace_vga_vbe_read(s->vbe_index, val);
729 return val;
730 }
731
732 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
733 {
734 VGACommonState *s = opaque;
735 s->vbe_index = val;
736 }
737
738 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
739 {
740 VGACommonState *s = opaque;
741
742 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
743 trace_vga_vbe_write(s->vbe_index, val);
744 switch(s->vbe_index) {
745 case VBE_DISPI_INDEX_ID:
746 if (val == VBE_DISPI_ID0 ||
747 val == VBE_DISPI_ID1 ||
748 val == VBE_DISPI_ID2 ||
749 val == VBE_DISPI_ID3 ||
750 val == VBE_DISPI_ID4) {
751 s->vbe_regs[s->vbe_index] = val;
752 }
753 break;
754 case VBE_DISPI_INDEX_XRES:
755 case VBE_DISPI_INDEX_YRES:
756 case VBE_DISPI_INDEX_BPP:
757 case VBE_DISPI_INDEX_VIRT_WIDTH:
758 case VBE_DISPI_INDEX_X_OFFSET:
759 case VBE_DISPI_INDEX_Y_OFFSET:
760 s->vbe_regs[s->vbe_index] = val;
761 vbe_fixup_regs(s);
762 vbe_update_vgaregs(s);
763 break;
764 case VBE_DISPI_INDEX_BANK:
765 val &= s->vbe_bank_mask;
766 s->vbe_regs[s->vbe_index] = val;
767 s->bank_offset = (val << 16);
768 vga_update_memory_access(s);
769 break;
770 case VBE_DISPI_INDEX_ENABLE:
771 if ((val & VBE_DISPI_ENABLED) &&
772 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
773
774 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
775 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
776 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
777 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
778 vbe_fixup_regs(s);
779 vbe_update_vgaregs(s);
780
781 /* clear the screen */
782 if (!(val & VBE_DISPI_NOCLEARMEM)) {
783 memset(s->vram_ptr, 0,
784 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
785 }
786 } else {
787 s->bank_offset = 0;
788 }
789 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
790 s->vbe_regs[s->vbe_index] = val;
791 vga_update_memory_access(s);
792 break;
793 default:
794 break;
795 }
796 }
797 }
798
799 /* called for accesses between 0xa0000 and 0xc0000 */
800 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
801 {
802 int memory_map_mode, plane;
803 uint32_t ret;
804
805 /* convert to VGA memory offset */
806 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
807 addr &= 0x1ffff;
808 switch(memory_map_mode) {
809 case 0:
810 break;
811 case 1:
812 if (addr >= 0x10000)
813 return 0xff;
814 addr += s->bank_offset;
815 break;
816 case 2:
817 addr -= 0x10000;
818 if (addr >= 0x8000)
819 return 0xff;
820 break;
821 default:
822 case 3:
823 addr -= 0x18000;
824 if (addr >= 0x8000)
825 return 0xff;
826 break;
827 }
828
829 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
830 /* chain 4 mode : simplest access */
831 assert(addr < s->vram_size);
832 ret = s->vram_ptr[addr];
833 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
834 /* odd/even mode (aka text mode mapping) */
835 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
836 addr = ((addr & ~1) << 1) | plane;
837 if (addr >= s->vram_size) {
838 return 0xff;
839 }
840 ret = s->vram_ptr[addr];
841 } else {
842 /* standard VGA latched access */
843 if (addr * sizeof(uint32_t) >= s->vram_size) {
844 return 0xff;
845 }
846 s->latch = ((uint32_t *)s->vram_ptr)[addr];
847
848 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
849 /* read mode 0 */
850 plane = s->gr[VGA_GFX_PLANE_READ];
851 ret = GET_PLANE(s->latch, plane);
852 } else {
853 /* read mode 1 */
854 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
855 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
856 ret |= ret >> 16;
857 ret |= ret >> 8;
858 ret = (~ret) & 0xff;
859 }
860 }
861 return ret;
862 }
863
864 /* called for accesses between 0xa0000 and 0xc0000 */
865 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
866 {
867 int memory_map_mode, plane, write_mode, b, func_select, mask;
868 uint32_t write_mask, bit_mask, set_mask;
869
870 #ifdef DEBUG_VGA_MEM
871 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
872 #endif
873 /* convert to VGA memory offset */
874 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
875 addr &= 0x1ffff;
876 switch(memory_map_mode) {
877 case 0:
878 break;
879 case 1:
880 if (addr >= 0x10000)
881 return;
882 addr += s->bank_offset;
883 break;
884 case 2:
885 addr -= 0x10000;
886 if (addr >= 0x8000)
887 return;
888 break;
889 default:
890 case 3:
891 addr -= 0x18000;
892 if (addr >= 0x8000)
893 return;
894 break;
895 }
896
897 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
898 /* chain 4 mode : simplest access */
899 plane = addr & 3;
900 mask = (1 << plane);
901 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
902 assert(addr < s->vram_size);
903 s->vram_ptr[addr] = val;
904 #ifdef DEBUG_VGA_MEM
905 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
906 #endif
907 s->plane_updated |= mask; /* only used to detect font change */
908 memory_region_set_dirty(&s->vram, addr, 1);
909 }
910 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
911 /* odd/even mode (aka text mode mapping) */
912 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
913 mask = (1 << plane);
914 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
915 addr = ((addr & ~1) << 1) | plane;
916 if (addr >= s->vram_size) {
917 return;
918 }
919 s->vram_ptr[addr] = val;
920 #ifdef DEBUG_VGA_MEM
921 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
922 #endif
923 s->plane_updated |= mask; /* only used to detect font change */
924 memory_region_set_dirty(&s->vram, addr, 1);
925 }
926 } else {
927 /* standard VGA latched access */
928 write_mode = s->gr[VGA_GFX_MODE] & 3;
929 switch(write_mode) {
930 default:
931 case 0:
932 /* rotate */
933 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
934 val = ((val >> b) | (val << (8 - b))) & 0xff;
935 val |= val << 8;
936 val |= val << 16;
937
938 /* apply set/reset mask */
939 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
940 val = (val & ~set_mask) |
941 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
942 bit_mask = s->gr[VGA_GFX_BIT_MASK];
943 break;
944 case 1:
945 val = s->latch;
946 goto do_write;
947 case 2:
948 val = mask16[val & 0x0f];
949 bit_mask = s->gr[VGA_GFX_BIT_MASK];
950 break;
951 case 3:
952 /* rotate */
953 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
954 val = (val >> b) | (val << (8 - b));
955
956 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
957 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
958 break;
959 }
960
961 /* apply logical operation */
962 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
963 switch(func_select) {
964 case 0:
965 default:
966 /* nothing to do */
967 break;
968 case 1:
969 /* and */
970 val &= s->latch;
971 break;
972 case 2:
973 /* or */
974 val |= s->latch;
975 break;
976 case 3:
977 /* xor */
978 val ^= s->latch;
979 break;
980 }
981
982 /* apply bit mask */
983 bit_mask |= bit_mask << 8;
984 bit_mask |= bit_mask << 16;
985 val = (val & bit_mask) | (s->latch & ~bit_mask);
986
987 do_write:
988 /* mask data according to sr[2] */
989 mask = sr(s, VGA_SEQ_PLANE_WRITE);
990 s->plane_updated |= mask; /* only used to detect font change */
991 write_mask = mask16[mask];
992 if (addr * sizeof(uint32_t) >= s->vram_size) {
993 return;
994 }
995 ((uint32_t *)s->vram_ptr)[addr] =
996 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
997 (val & write_mask);
998 #ifdef DEBUG_VGA_MEM
999 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1000 addr * 4, write_mask, val);
1001 #endif
1002 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1003 }
1004 }
1005
1006 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1007 uint32_t srcaddr, int width);
1008
1009 #include "vga-helpers.h"
1010
1011 /* return true if the palette was modified */
1012 static int update_palette16(VGACommonState *s)
1013 {
1014 int full_update, i;
1015 uint32_t v, col, *palette;
1016
1017 full_update = 0;
1018 palette = s->last_palette;
1019 for(i = 0; i < 16; i++) {
1020 v = s->ar[i];
1021 if (s->ar[VGA_ATC_MODE] & 0x80) {
1022 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1023 } else {
1024 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1025 }
1026 v = v * 3;
1027 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1028 c6_to_8(s->palette[v + 1]),
1029 c6_to_8(s->palette[v + 2]));
1030 if (col != palette[i]) {
1031 full_update = 1;
1032 palette[i] = col;
1033 }
1034 }
1035 return full_update;
1036 }
1037
1038 /* return true if the palette was modified */
1039 static int update_palette256(VGACommonState *s)
1040 {
1041 int full_update, i;
1042 uint32_t v, col, *palette;
1043
1044 full_update = 0;
1045 palette = s->last_palette;
1046 v = 0;
1047 for(i = 0; i < 256; i++) {
1048 if (s->dac_8bit) {
1049 col = rgb_to_pixel32(s->palette[v],
1050 s->palette[v + 1],
1051 s->palette[v + 2]);
1052 } else {
1053 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1054 c6_to_8(s->palette[v + 1]),
1055 c6_to_8(s->palette[v + 2]));
1056 }
1057 if (col != palette[i]) {
1058 full_update = 1;
1059 palette[i] = col;
1060 }
1061 v += 3;
1062 }
1063 return full_update;
1064 }
1065
1066 static void vga_get_offsets(VGACommonState *s,
1067 uint32_t *pline_offset,
1068 uint32_t *pstart_addr,
1069 uint32_t *pline_compare)
1070 {
1071 uint32_t start_addr, line_offset, line_compare;
1072
1073 if (vbe_enabled(s)) {
1074 line_offset = s->vbe_line_offset;
1075 start_addr = s->vbe_start_addr;
1076 line_compare = 65535;
1077 } else {
1078 /* compute line_offset in bytes */
1079 line_offset = s->cr[VGA_CRTC_OFFSET];
1080 line_offset <<= 3;
1081
1082 /* starting address */
1083 start_addr = s->cr[VGA_CRTC_START_LO] |
1084 (s->cr[VGA_CRTC_START_HI] << 8);
1085
1086 /* line compare */
1087 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1088 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1089 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1090 }
1091 *pline_offset = line_offset;
1092 *pstart_addr = start_addr;
1093 *pline_compare = line_compare;
1094 }
1095
1096 /* update start_addr and line_offset. Return TRUE if modified */
1097 static int update_basic_params(VGACommonState *s)
1098 {
1099 int full_update;
1100 uint32_t start_addr, line_offset, line_compare;
1101
1102 full_update = 0;
1103
1104 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1105
1106 if (line_offset != s->line_offset ||
1107 start_addr != s->start_addr ||
1108 line_compare != s->line_compare) {
1109 s->line_offset = line_offset;
1110 s->start_addr = start_addr;
1111 s->line_compare = line_compare;
1112 full_update = 1;
1113 }
1114 return full_update;
1115 }
1116
1117
1118 static const uint8_t cursor_glyph[32 * 4] = {
1119 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1126 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1128 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1129 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1130 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1135 };
1136
1137 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1138 int *pcwidth, int *pcheight)
1139 {
1140 int width, cwidth, height, cheight;
1141
1142 /* total width & height */
1143 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1144 cwidth = 8;
1145 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1146 cwidth = 9;
1147 }
1148 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1149 cwidth = 16; /* NOTE: no 18 pixel wide */
1150 }
1151 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1152 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1153 /* ugly hack for CGA 160x100x16 - explain me the logic */
1154 height = 100;
1155 } else {
1156 height = s->cr[VGA_CRTC_V_DISP_END] |
1157 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1158 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1159 height = (height + 1) / cheight;
1160 }
1161
1162 *pwidth = width;
1163 *pheight = height;
1164 *pcwidth = cwidth;
1165 *pcheight = cheight;
1166 }
1167
1168 /*
1169 * Text mode update
1170 * Missing:
1171 * - double scan
1172 * - double width
1173 * - underline
1174 * - flashing
1175 */
1176 static void vga_draw_text(VGACommonState *s, int full_update)
1177 {
1178 DisplaySurface *surface = qemu_console_surface(s->con);
1179 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1180 int cx_min, cx_max, linesize, x_incr, line, line1;
1181 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1182 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1183 const uint8_t *font_ptr, *font_base[2];
1184 int dup9, line_offset;
1185 uint32_t *palette;
1186 uint32_t *ch_attr_ptr;
1187 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1188
1189 /* compute font data address (in plane 2) */
1190 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1191 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1192 if (offset != s->font_offsets[0]) {
1193 s->font_offsets[0] = offset;
1194 full_update = 1;
1195 }
1196 font_base[0] = s->vram_ptr + offset;
1197
1198 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1199 font_base[1] = s->vram_ptr + offset;
1200 if (offset != s->font_offsets[1]) {
1201 s->font_offsets[1] = offset;
1202 full_update = 1;
1203 }
1204 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1205 /* if the plane 2 was modified since the last display, it
1206 indicates the font may have been modified */
1207 s->plane_updated = 0;
1208 full_update = 1;
1209 }
1210 full_update |= update_basic_params(s);
1211
1212 line_offset = s->line_offset;
1213
1214 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1215 if ((height * width) <= 1) {
1216 /* better than nothing: exit if transient size is too small */
1217 return;
1218 }
1219 if ((height * width) > CH_ATTR_SIZE) {
1220 /* better than nothing: exit if transient size is too big */
1221 return;
1222 }
1223
1224 if (width != s->last_width || height != s->last_height ||
1225 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1226 s->last_scr_width = width * cw;
1227 s->last_scr_height = height * cheight;
1228 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1229 surface = qemu_console_surface(s->con);
1230 dpy_text_resize(s->con, width, height);
1231 s->last_depth = 0;
1232 s->last_width = width;
1233 s->last_height = height;
1234 s->last_ch = cheight;
1235 s->last_cw = cw;
1236 full_update = 1;
1237 }
1238 full_update |= update_palette16(s);
1239 palette = s->last_palette;
1240 x_incr = cw * surface_bytes_per_pixel(surface);
1241
1242 if (full_update) {
1243 s->full_update_text = 1;
1244 }
1245 if (s->full_update_gfx) {
1246 s->full_update_gfx = 0;
1247 full_update |= 1;
1248 }
1249
1250 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1251 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1252 if (cursor_offset != s->cursor_offset ||
1253 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1254 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1255 /* if the cursor position changed, we update the old and new
1256 chars */
1257 if (s->cursor_offset < CH_ATTR_SIZE)
1258 s->last_ch_attr[s->cursor_offset] = -1;
1259 if (cursor_offset < CH_ATTR_SIZE)
1260 s->last_ch_attr[cursor_offset] = -1;
1261 s->cursor_offset = cursor_offset;
1262 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1263 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1264 }
1265 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1266 if (now >= s->cursor_blink_time) {
1267 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1268 s->cursor_visible_phase = !s->cursor_visible_phase;
1269 }
1270
1271 dest = surface_data(surface);
1272 linesize = surface_stride(surface);
1273 ch_attr_ptr = s->last_ch_attr;
1274 line = 0;
1275 offset = s->start_addr * 4;
1276 for(cy = 0; cy < height; cy++) {
1277 d1 = dest;
1278 src = s->vram_ptr + offset;
1279 cx_min = width;
1280 cx_max = -1;
1281 for(cx = 0; cx < width; cx++) {
1282 ch_attr = *(uint16_t *)src;
1283 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1284 if (cx < cx_min)
1285 cx_min = cx;
1286 if (cx > cx_max)
1287 cx_max = cx;
1288 *ch_attr_ptr = ch_attr;
1289 #ifdef HOST_WORDS_BIGENDIAN
1290 ch = ch_attr >> 8;
1291 cattr = ch_attr & 0xff;
1292 #else
1293 ch = ch_attr & 0xff;
1294 cattr = ch_attr >> 8;
1295 #endif
1296 font_ptr = font_base[(cattr >> 3) & 1];
1297 font_ptr += 32 * 4 * ch;
1298 bgcol = palette[cattr >> 4];
1299 fgcol = palette[cattr & 0x0f];
1300 if (cw == 16) {
1301 vga_draw_glyph16(d1, linesize,
1302 font_ptr, cheight, fgcol, bgcol);
1303 } else if (cw != 9) {
1304 vga_draw_glyph8(d1, linesize,
1305 font_ptr, cheight, fgcol, bgcol);
1306 } else {
1307 dup9 = 0;
1308 if (ch >= 0xb0 && ch <= 0xdf &&
1309 (s->ar[VGA_ATC_MODE] & 0x04)) {
1310 dup9 = 1;
1311 }
1312 vga_draw_glyph9(d1, linesize,
1313 font_ptr, cheight, fgcol, bgcol, dup9);
1314 }
1315 if (src == cursor_ptr &&
1316 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1317 s->cursor_visible_phase) {
1318 int line_start, line_last, h;
1319 /* draw the cursor */
1320 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1321 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1322 /* XXX: check that */
1323 if (line_last > cheight - 1)
1324 line_last = cheight - 1;
1325 if (line_last >= line_start && line_start < cheight) {
1326 h = line_last - line_start + 1;
1327 d = d1 + linesize * line_start;
1328 if (cw == 16) {
1329 vga_draw_glyph16(d, linesize,
1330 cursor_glyph, h, fgcol, bgcol);
1331 } else if (cw != 9) {
1332 vga_draw_glyph8(d, linesize,
1333 cursor_glyph, h, fgcol, bgcol);
1334 } else {
1335 vga_draw_glyph9(d, linesize,
1336 cursor_glyph, h, fgcol, bgcol, 1);
1337 }
1338 }
1339 }
1340 }
1341 d1 += x_incr;
1342 src += 4;
1343 ch_attr_ptr++;
1344 }
1345 if (cx_max != -1) {
1346 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1347 (cx_max - cx_min + 1) * cw, cheight);
1348 }
1349 dest += linesize * cheight;
1350 line1 = line + cheight;
1351 offset += line_offset;
1352 if (line < s->line_compare && line1 >= s->line_compare) {
1353 offset = 0;
1354 }
1355 line = line1;
1356 }
1357 }
1358
1359 enum {
1360 VGA_DRAW_LINE2,
1361 VGA_DRAW_LINE2D2,
1362 VGA_DRAW_LINE4,
1363 VGA_DRAW_LINE4D2,
1364 VGA_DRAW_LINE8D2,
1365 VGA_DRAW_LINE8,
1366 VGA_DRAW_LINE15_LE,
1367 VGA_DRAW_LINE16_LE,
1368 VGA_DRAW_LINE24_LE,
1369 VGA_DRAW_LINE32_LE,
1370 VGA_DRAW_LINE15_BE,
1371 VGA_DRAW_LINE16_BE,
1372 VGA_DRAW_LINE24_BE,
1373 VGA_DRAW_LINE32_BE,
1374 VGA_DRAW_LINE_NB,
1375 };
1376
1377 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1378 vga_draw_line2,
1379 vga_draw_line2d2,
1380 vga_draw_line4,
1381 vga_draw_line4d2,
1382 vga_draw_line8d2,
1383 vga_draw_line8,
1384 vga_draw_line15_le,
1385 vga_draw_line16_le,
1386 vga_draw_line24_le,
1387 vga_draw_line32_le,
1388 vga_draw_line15_be,
1389 vga_draw_line16_be,
1390 vga_draw_line24_be,
1391 vga_draw_line32_be,
1392 };
1393
1394 static int vga_get_bpp(VGACommonState *s)
1395 {
1396 int ret;
1397
1398 if (vbe_enabled(s)) {
1399 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1400 } else {
1401 ret = 0;
1402 }
1403 return ret;
1404 }
1405
1406 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1407 {
1408 int width, height;
1409
1410 if (vbe_enabled(s)) {
1411 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1412 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1413 } else {
1414 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1415 height = s->cr[VGA_CRTC_V_DISP_END] |
1416 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1417 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1418 height = (height + 1);
1419 }
1420 *pwidth = width;
1421 *pheight = height;
1422 }
1423
1424 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1425 {
1426 int y;
1427 if (y1 >= VGA_MAX_HEIGHT)
1428 return;
1429 if (y2 >= VGA_MAX_HEIGHT)
1430 y2 = VGA_MAX_HEIGHT;
1431 for(y = y1; y < y2; y++) {
1432 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1433 }
1434 }
1435
1436 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1437 {
1438 if (y >= VGA_MAX_HEIGHT) {
1439 return false;
1440 }
1441 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1442 }
1443
1444 void vga_sync_dirty_bitmap(VGACommonState *s)
1445 {
1446 memory_region_sync_dirty_bitmap(&s->vram);
1447 }
1448
1449 void vga_dirty_log_start(VGACommonState *s)
1450 {
1451 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1452 }
1453
1454 void vga_dirty_log_stop(VGACommonState *s)
1455 {
1456 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1457 }
1458
1459 /*
1460 * graphic modes
1461 */
1462 static void vga_draw_graphic(VGACommonState *s, int full_update)
1463 {
1464 DisplaySurface *surface = qemu_console_surface(s->con);
1465 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1466 int width, height, shift_control, bwidth, bits;
1467 ram_addr_t page0, page1, region_start, region_end;
1468 DirtyBitmapSnapshot *snap = NULL;
1469 int disp_width, multi_scan, multi_run;
1470 uint8_t *d;
1471 uint32_t v, addr1, addr;
1472 vga_draw_line_func *vga_draw_line = NULL;
1473 bool share_surface, force_shadow = false;
1474 pixman_format_code_t format;
1475 #ifdef HOST_WORDS_BIGENDIAN
1476 bool byteswap = !s->big_endian_fb;
1477 #else
1478 bool byteswap = s->big_endian_fb;
1479 #endif
1480
1481 full_update |= update_basic_params(s);
1482
1483 s->get_resolution(s, &width, &height);
1484 disp_width = width;
1485
1486 region_start = (s->start_addr * 4);
1487 region_end = region_start + (ram_addr_t)s->line_offset * height;
1488 if (region_end > s->vbe_size) {
1489 /* wraps around (can happen with cirrus vbe modes) */
1490 region_start = 0;
1491 region_end = s->vbe_size;
1492 force_shadow = true;
1493 }
1494
1495 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1496 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1497 if (shift_control != 1) {
1498 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1499 - 1;
1500 } else {
1501 /* in CGA modes, multi_scan is ignored */
1502 /* XXX: is it correct ? */
1503 multi_scan = double_scan;
1504 }
1505 multi_run = multi_scan;
1506 if (shift_control != s->shift_control ||
1507 double_scan != s->double_scan) {
1508 full_update = 1;
1509 s->shift_control = shift_control;
1510 s->double_scan = double_scan;
1511 }
1512
1513 if (shift_control == 0) {
1514 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1515 disp_width <<= 1;
1516 }
1517 } else if (shift_control == 1) {
1518 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1519 disp_width <<= 1;
1520 }
1521 }
1522
1523 depth = s->get_bpp(s);
1524
1525 /*
1526 * Check whether we can share the surface with the backend
1527 * or whether we need a shadow surface. We share native
1528 * endian surfaces for 15bpp and above and byteswapped
1529 * surfaces for 24bpp and above.
1530 */
1531 format = qemu_default_pixman_format(depth, !byteswap);
1532 if (format) {
1533 share_surface = dpy_gfx_check_format(s->con, format)
1534 && !s->force_shadow && !force_shadow;
1535 } else {
1536 share_surface = false;
1537 }
1538 if (s->line_offset != s->last_line_offset ||
1539 disp_width != s->last_width ||
1540 height != s->last_height ||
1541 s->last_depth != depth ||
1542 s->last_byteswap != byteswap ||
1543 share_surface != is_buffer_shared(surface)) {
1544 if (share_surface) {
1545 surface = qemu_create_displaysurface_from(disp_width,
1546 height, format, s->line_offset,
1547 s->vram_ptr + (s->start_addr * 4));
1548 dpy_gfx_replace_surface(s->con, surface);
1549 } else {
1550 qemu_console_resize(s->con, disp_width, height);
1551 surface = qemu_console_surface(s->con);
1552 }
1553 s->last_scr_width = disp_width;
1554 s->last_scr_height = height;
1555 s->last_width = disp_width;
1556 s->last_height = height;
1557 s->last_line_offset = s->line_offset;
1558 s->last_depth = depth;
1559 s->last_byteswap = byteswap;
1560 full_update = 1;
1561 } else if (is_buffer_shared(surface) &&
1562 (full_update || surface_data(surface) != s->vram_ptr
1563 + (s->start_addr * 4))) {
1564 pixman_format_code_t format =
1565 qemu_default_pixman_format(depth, !byteswap);
1566 surface = qemu_create_displaysurface_from(disp_width,
1567 height, format, s->line_offset,
1568 s->vram_ptr + (s->start_addr * 4));
1569 dpy_gfx_replace_surface(s->con, surface);
1570 }
1571
1572 if (shift_control == 0) {
1573 full_update |= update_palette16(s);
1574 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1575 v = VGA_DRAW_LINE4D2;
1576 } else {
1577 v = VGA_DRAW_LINE4;
1578 }
1579 bits = 4;
1580 } else if (shift_control == 1) {
1581 full_update |= update_palette16(s);
1582 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1583 v = VGA_DRAW_LINE2D2;
1584 } else {
1585 v = VGA_DRAW_LINE2;
1586 }
1587 bits = 4;
1588 } else {
1589 switch(s->get_bpp(s)) {
1590 default:
1591 case 0:
1592 full_update |= update_palette256(s);
1593 v = VGA_DRAW_LINE8D2;
1594 bits = 4;
1595 break;
1596 case 8:
1597 full_update |= update_palette256(s);
1598 v = VGA_DRAW_LINE8;
1599 bits = 8;
1600 break;
1601 case 15:
1602 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1603 bits = 16;
1604 break;
1605 case 16:
1606 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1607 bits = 16;
1608 break;
1609 case 24:
1610 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1611 bits = 24;
1612 break;
1613 case 32:
1614 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1615 bits = 32;
1616 break;
1617 }
1618 }
1619 vga_draw_line = vga_draw_line_table[v];
1620
1621 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1622 s->cursor_invalidate(s);
1623 }
1624
1625 #if 0
1626 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",
1627 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1628 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1629 #endif
1630 addr1 = (s->start_addr * 4);
1631 bwidth = DIV_ROUND_UP(width * bits, 8);
1632 y_start = -1;
1633 d = surface_data(surface);
1634 linesize = surface_stride(surface);
1635 y1 = 0;
1636
1637 if (!full_update) {
1638 vga_sync_dirty_bitmap(s);
1639 if (s->line_compare < height) {
1640 /* split screen mode */
1641 region_start = 0;
1642 }
1643 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1644 region_end - region_start,
1645 DIRTY_MEMORY_VGA);
1646 }
1647
1648 for(y = 0; y < height; y++) {
1649 addr = addr1;
1650 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1651 int shift;
1652 /* CGA compatibility handling */
1653 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1654 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1655 }
1656 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1657 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1658 }
1659 update = full_update;
1660 page0 = addr & s->vbe_size_mask;
1661 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1662 if (full_update) {
1663 update = 1;
1664 } else if (page1 < page0) {
1665 /* scanline wraps from end of video memory to the start */
1666 assert(force_shadow);
1667 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1668 page0, s->vbe_size - page0);
1669 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1670 0, page1);
1671 } else {
1672 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1673 page0, page1 - page0);
1674 }
1675 /* explicit invalidation for the hardware cursor (cirrus only) */
1676 update |= vga_scanline_invalidated(s, y);
1677 if (update) {
1678 if (y_start < 0)
1679 y_start = y;
1680 if (!(is_buffer_shared(surface))) {
1681 vga_draw_line(s, d, addr, width);
1682 if (s->cursor_draw_line)
1683 s->cursor_draw_line(s, d, y);
1684 }
1685 } else {
1686 if (y_start >= 0) {
1687 /* flush to display */
1688 dpy_gfx_update(s->con, 0, y_start,
1689 disp_width, y - y_start);
1690 y_start = -1;
1691 }
1692 }
1693 if (!multi_run) {
1694 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1695 if ((y1 & mask) == mask)
1696 addr1 += s->line_offset;
1697 y1++;
1698 multi_run = multi_scan;
1699 } else {
1700 multi_run--;
1701 }
1702 /* line compare acts on the displayed lines */
1703 if (y == s->line_compare)
1704 addr1 = 0;
1705 d += linesize;
1706 }
1707 if (y_start >= 0) {
1708 /* flush to display */
1709 dpy_gfx_update(s->con, 0, y_start,
1710 disp_width, y - y_start);
1711 }
1712 g_free(snap);
1713 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1714 }
1715
1716 static void vga_draw_blank(VGACommonState *s, int full_update)
1717 {
1718 DisplaySurface *surface = qemu_console_surface(s->con);
1719 int i, w;
1720 uint8_t *d;
1721
1722 if (!full_update)
1723 return;
1724 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1725 return;
1726
1727 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1728 d = surface_data(surface);
1729 for(i = 0; i < s->last_scr_height; i++) {
1730 memset(d, 0, w);
1731 d += surface_stride(surface);
1732 }
1733 dpy_gfx_update(s->con, 0, 0,
1734 s->last_scr_width, s->last_scr_height);
1735 }
1736
1737 #define GMODE_TEXT 0
1738 #define GMODE_GRAPH 1
1739 #define GMODE_BLANK 2
1740
1741 static void vga_update_display(void *opaque)
1742 {
1743 VGACommonState *s = opaque;
1744 DisplaySurface *surface = qemu_console_surface(s->con);
1745 int full_update, graphic_mode;
1746
1747 qemu_flush_coalesced_mmio_buffer();
1748
1749 if (surface_bits_per_pixel(surface) == 0) {
1750 /* nothing to do */
1751 } else {
1752 full_update = 0;
1753 if (!(s->ar_index & 0x20)) {
1754 graphic_mode = GMODE_BLANK;
1755 } else {
1756 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1757 }
1758 if (graphic_mode != s->graphic_mode) {
1759 s->graphic_mode = graphic_mode;
1760 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1761 full_update = 1;
1762 }
1763 switch(graphic_mode) {
1764 case GMODE_TEXT:
1765 vga_draw_text(s, full_update);
1766 break;
1767 case GMODE_GRAPH:
1768 vga_draw_graphic(s, full_update);
1769 break;
1770 case GMODE_BLANK:
1771 default:
1772 vga_draw_blank(s, full_update);
1773 break;
1774 }
1775 }
1776 }
1777
1778 /* force a full display refresh */
1779 static void vga_invalidate_display(void *opaque)
1780 {
1781 VGACommonState *s = opaque;
1782
1783 s->last_width = -1;
1784 s->last_height = -1;
1785 }
1786
1787 void vga_common_reset(VGACommonState *s)
1788 {
1789 s->sr_index = 0;
1790 memset(s->sr, '\0', sizeof(s->sr));
1791 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1792 s->gr_index = 0;
1793 memset(s->gr, '\0', sizeof(s->gr));
1794 s->ar_index = 0;
1795 memset(s->ar, '\0', sizeof(s->ar));
1796 s->ar_flip_flop = 0;
1797 s->cr_index = 0;
1798 memset(s->cr, '\0', sizeof(s->cr));
1799 s->msr = 0;
1800 s->fcr = 0;
1801 s->st00 = 0;
1802 s->st01 = 0;
1803 s->dac_state = 0;
1804 s->dac_sub_index = 0;
1805 s->dac_read_index = 0;
1806 s->dac_write_index = 0;
1807 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1808 s->dac_8bit = 0;
1809 memset(s->palette, '\0', sizeof(s->palette));
1810 s->bank_offset = 0;
1811 s->vbe_index = 0;
1812 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1813 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1814 s->vbe_start_addr = 0;
1815 s->vbe_line_offset = 0;
1816 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1817 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1818 s->graphic_mode = -1; /* force full update */
1819 s->shift_control = 0;
1820 s->double_scan = 0;
1821 s->line_offset = 0;
1822 s->line_compare = 0;
1823 s->start_addr = 0;
1824 s->plane_updated = 0;
1825 s->last_cw = 0;
1826 s->last_ch = 0;
1827 s->last_width = 0;
1828 s->last_height = 0;
1829 s->last_scr_width = 0;
1830 s->last_scr_height = 0;
1831 s->cursor_start = 0;
1832 s->cursor_end = 0;
1833 s->cursor_offset = 0;
1834 s->big_endian_fb = s->default_endian_fb;
1835 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1836 memset(s->last_palette, '\0', sizeof(s->last_palette));
1837 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1838 switch (vga_retrace_method) {
1839 case VGA_RETRACE_DUMB:
1840 break;
1841 case VGA_RETRACE_PRECISE:
1842 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1843 break;
1844 }
1845 vga_update_memory_access(s);
1846 }
1847
1848 static void vga_reset(void *opaque)
1849 {
1850 VGACommonState *s = opaque;
1851 vga_common_reset(s);
1852 }
1853
1854 #define TEXTMODE_X(x) ((x) % width)
1855 #define TEXTMODE_Y(x) ((x) / width)
1856 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1857 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1858 /* relay text rendering to the display driver
1859 * instead of doing a full vga_update_display() */
1860 static void vga_update_text(void *opaque, console_ch_t *chardata)
1861 {
1862 VGACommonState *s = opaque;
1863 int graphic_mode, i, cursor_offset, cursor_visible;
1864 int cw, cheight, width, height, size, c_min, c_max;
1865 uint32_t *src;
1866 console_ch_t *dst, val;
1867 char msg_buffer[80];
1868 int full_update = 0;
1869
1870 qemu_flush_coalesced_mmio_buffer();
1871
1872 if (!(s->ar_index & 0x20)) {
1873 graphic_mode = GMODE_BLANK;
1874 } else {
1875 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1876 }
1877 if (graphic_mode != s->graphic_mode) {
1878 s->graphic_mode = graphic_mode;
1879 full_update = 1;
1880 }
1881 if (s->last_width == -1) {
1882 s->last_width = 0;
1883 full_update = 1;
1884 }
1885
1886 switch (graphic_mode) {
1887 case GMODE_TEXT:
1888 /* TODO: update palette */
1889 full_update |= update_basic_params(s);
1890
1891 /* total width & height */
1892 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1893 cw = 8;
1894 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1895 cw = 9;
1896 }
1897 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1898 cw = 16; /* NOTE: no 18 pixel wide */
1899 }
1900 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1901 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1902 /* ugly hack for CGA 160x100x16 - explain me the logic */
1903 height = 100;
1904 } else {
1905 height = s->cr[VGA_CRTC_V_DISP_END] |
1906 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1907 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1908 height = (height + 1) / cheight;
1909 }
1910
1911 size = (height * width);
1912 if (size > CH_ATTR_SIZE) {
1913 if (!full_update)
1914 return;
1915
1916 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1917 width, height);
1918 break;
1919 }
1920
1921 if (width != s->last_width || height != s->last_height ||
1922 cw != s->last_cw || cheight != s->last_ch) {
1923 s->last_scr_width = width * cw;
1924 s->last_scr_height = height * cheight;
1925 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1926 dpy_text_resize(s->con, width, height);
1927 s->last_depth = 0;
1928 s->last_width = width;
1929 s->last_height = height;
1930 s->last_ch = cheight;
1931 s->last_cw = cw;
1932 full_update = 1;
1933 }
1934
1935 if (full_update) {
1936 s->full_update_gfx = 1;
1937 }
1938 if (s->full_update_text) {
1939 s->full_update_text = 0;
1940 full_update |= 1;
1941 }
1942
1943 /* Update "hardware" cursor */
1944 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1945 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1946 if (cursor_offset != s->cursor_offset ||
1947 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1948 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1949 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1950 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1951 dpy_text_cursor(s->con,
1952 TEXTMODE_X(cursor_offset),
1953 TEXTMODE_Y(cursor_offset));
1954 else
1955 dpy_text_cursor(s->con, -1, -1);
1956 s->cursor_offset = cursor_offset;
1957 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1958 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1959 }
1960
1961 src = (uint32_t *) s->vram_ptr + s->start_addr;
1962 dst = chardata;
1963
1964 if (full_update) {
1965 for (i = 0; i < size; src ++, dst ++, i ++)
1966 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1967
1968 dpy_text_update(s->con, 0, 0, width, height);
1969 } else {
1970 c_max = 0;
1971
1972 for (i = 0; i < size; src ++, dst ++, i ++) {
1973 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1974 if (*dst != val) {
1975 *dst = val;
1976 c_max = i;
1977 break;
1978 }
1979 }
1980 c_min = i;
1981 for (; i < size; src ++, dst ++, i ++) {
1982 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1983 if (*dst != val) {
1984 *dst = val;
1985 c_max = i;
1986 }
1987 }
1988
1989 if (c_min <= c_max) {
1990 i = TEXTMODE_Y(c_min);
1991 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
1992 }
1993 }
1994
1995 return;
1996 case GMODE_GRAPH:
1997 if (!full_update)
1998 return;
1999
2000 s->get_resolution(s, &width, &height);
2001 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2002 width, height);
2003 break;
2004 case GMODE_BLANK:
2005 default:
2006 if (!full_update)
2007 return;
2008
2009 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2010 break;
2011 }
2012
2013 /* Display a message */
2014 s->last_width = 60;
2015 s->last_height = height = 3;
2016 dpy_text_cursor(s->con, -1, -1);
2017 dpy_text_resize(s->con, s->last_width, height);
2018
2019 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2020 console_write_ch(dst ++, ' ');
2021
2022 size = strlen(msg_buffer);
2023 width = (s->last_width - size) / 2;
2024 dst = chardata + s->last_width + width;
2025 for (i = 0; i < size; i ++)
2026 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2027 QEMU_COLOR_BLACK, 1));
2028
2029 dpy_text_update(s->con, 0, 0, s->last_width, height);
2030 }
2031
2032 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2033 unsigned size)
2034 {
2035 VGACommonState *s = opaque;
2036
2037 return vga_mem_readb(s, addr);
2038 }
2039
2040 static void vga_mem_write(void *opaque, hwaddr addr,
2041 uint64_t data, unsigned size)
2042 {
2043 VGACommonState *s = opaque;
2044
2045 vga_mem_writeb(s, addr, data);
2046 }
2047
2048 const MemoryRegionOps vga_mem_ops = {
2049 .read = vga_mem_read,
2050 .write = vga_mem_write,
2051 .endianness = DEVICE_LITTLE_ENDIAN,
2052 .impl = {
2053 .min_access_size = 1,
2054 .max_access_size = 1,
2055 },
2056 };
2057
2058 static int vga_common_post_load(void *opaque, int version_id)
2059 {
2060 VGACommonState *s = opaque;
2061
2062 /* force refresh */
2063 s->graphic_mode = -1;
2064 vbe_update_vgaregs(s);
2065 vga_update_memory_access(s);
2066 return 0;
2067 }
2068
2069 static bool vga_endian_state_needed(void *opaque)
2070 {
2071 VGACommonState *s = opaque;
2072
2073 /*
2074 * Only send the endian state if it's different from the
2075 * default one, thus ensuring backward compatibility for
2076 * migration of the common case
2077 */
2078 return s->default_endian_fb != s->big_endian_fb;
2079 }
2080
2081 static const VMStateDescription vmstate_vga_endian = {
2082 .name = "vga.endian",
2083 .version_id = 1,
2084 .minimum_version_id = 1,
2085 .needed = vga_endian_state_needed,
2086 .fields = (VMStateField[]) {
2087 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2088 VMSTATE_END_OF_LIST()
2089 }
2090 };
2091
2092 const VMStateDescription vmstate_vga_common = {
2093 .name = "vga",
2094 .version_id = 2,
2095 .minimum_version_id = 2,
2096 .post_load = vga_common_post_load,
2097 .fields = (VMStateField[]) {
2098 VMSTATE_UINT32(latch, VGACommonState),
2099 VMSTATE_UINT8(sr_index, VGACommonState),
2100 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2101 VMSTATE_UINT8(gr_index, VGACommonState),
2102 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2103 VMSTATE_UINT8(ar_index, VGACommonState),
2104 VMSTATE_BUFFER(ar, VGACommonState),
2105 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2106 VMSTATE_UINT8(cr_index, VGACommonState),
2107 VMSTATE_BUFFER(cr, VGACommonState),
2108 VMSTATE_UINT8(msr, VGACommonState),
2109 VMSTATE_UINT8(fcr, VGACommonState),
2110 VMSTATE_UINT8(st00, VGACommonState),
2111 VMSTATE_UINT8(st01, VGACommonState),
2112
2113 VMSTATE_UINT8(dac_state, VGACommonState),
2114 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2115 VMSTATE_UINT8(dac_read_index, VGACommonState),
2116 VMSTATE_UINT8(dac_write_index, VGACommonState),
2117 VMSTATE_BUFFER(dac_cache, VGACommonState),
2118 VMSTATE_BUFFER(palette, VGACommonState),
2119
2120 VMSTATE_INT32(bank_offset, VGACommonState),
2121 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2122 VMSTATE_UINT16(vbe_index, VGACommonState),
2123 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2124 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2125 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2126 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2127 VMSTATE_END_OF_LIST()
2128 },
2129 .subsections = (const VMStateDescription*[]) {
2130 &vmstate_vga_endian,
2131 NULL
2132 }
2133 };
2134
2135 static const GraphicHwOps vga_ops = {
2136 .invalidate = vga_invalidate_display,
2137 .gfx_update = vga_update_display,
2138 .text_update = vga_update_text,
2139 };
2140
2141 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2142 {
2143 if (val < vmin) {
2144 return vmin;
2145 }
2146 if (val > vmax) {
2147 return vmax;
2148 }
2149 return val;
2150 }
2151
2152 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2153 {
2154 int i, j, v, b;
2155
2156 for(i = 0;i < 256; i++) {
2157 v = 0;
2158 for(j = 0; j < 8; j++) {
2159 v |= ((i >> j) & 1) << (j * 4);
2160 }
2161 expand4[i] = v;
2162
2163 v = 0;
2164 for(j = 0; j < 4; j++) {
2165 v |= ((i >> (2 * j)) & 3) << (j * 4);
2166 }
2167 expand2[i] = v;
2168 }
2169 for(i = 0; i < 16; i++) {
2170 v = 0;
2171 for(j = 0; j < 4; j++) {
2172 b = ((i >> j) & 1);
2173 v |= b << (2 * j);
2174 v |= b << (2 * j + 1);
2175 }
2176 expand4to8[i] = v;
2177 }
2178
2179 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2180 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2181 s->vram_size = s->vram_size_mb << 20;
2182
2183 if (!s->vbe_size) {
2184 s->vbe_size = s->vram_size;
2185 }
2186 s->vbe_size_mask = s->vbe_size - 1;
2187
2188 s->is_vbe_vmstate = 1;
2189 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2190 &error_fatal);
2191 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2192 xen_register_framebuffer(&s->vram);
2193 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2194 s->get_bpp = vga_get_bpp;
2195 s->get_offsets = vga_get_offsets;
2196 s->get_resolution = vga_get_resolution;
2197 s->hw_ops = &vga_ops;
2198 switch (vga_retrace_method) {
2199 case VGA_RETRACE_DUMB:
2200 s->retrace = vga_dumb_retrace;
2201 s->update_retrace_info = vga_dumb_update_retrace_info;
2202 break;
2203
2204 case VGA_RETRACE_PRECISE:
2205 s->retrace = vga_precise_retrace;
2206 s->update_retrace_info = vga_precise_update_retrace_info;
2207 break;
2208 }
2209
2210 /*
2211 * Set default fb endian based on target, could probably be turned
2212 * into a device attribute set by the machine/platform to remove
2213 * all target endian dependencies from this file.
2214 */
2215 #ifdef TARGET_WORDS_BIGENDIAN
2216 s->default_endian_fb = true;
2217 #else
2218 s->default_endian_fb = false;
2219 #endif
2220 vga_dirty_log_start(s);
2221 }
2222
2223 static const MemoryRegionPortio vga_portio_list[] = {
2224 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2225 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2226 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2227 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2228 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2229 PORTIO_END_OF_LIST(),
2230 };
2231
2232 static const MemoryRegionPortio vbe_portio_list[] = {
2233 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2234 # ifdef TARGET_I386
2235 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2236 # endif
2237 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2238 PORTIO_END_OF_LIST(),
2239 };
2240
2241 /* Used by both ISA and PCI */
2242 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2243 const MemoryRegionPortio **vga_ports,
2244 const MemoryRegionPortio **vbe_ports)
2245 {
2246 MemoryRegion *vga_mem;
2247
2248 *vga_ports = vga_portio_list;
2249 *vbe_ports = vbe_portio_list;
2250
2251 vga_mem = g_malloc(sizeof(*vga_mem));
2252 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2253 "vga-lowmem", 0x20000);
2254 memory_region_set_flush_coalesced(vga_mem);
2255
2256 return vga_mem;
2257 }
2258
2259 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2260 MemoryRegion *address_space_io, bool init_vga_ports)
2261 {
2262 MemoryRegion *vga_io_memory;
2263 const MemoryRegionPortio *vga_ports, *vbe_ports;
2264
2265 qemu_register_reset(vga_reset, s);
2266
2267 s->bank_offset = 0;
2268
2269 s->legacy_address_space = address_space;
2270
2271 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2272 memory_region_add_subregion_overlap(address_space,
2273 0x000a0000,
2274 vga_io_memory,
2275 1);
2276 memory_region_set_coalescing(vga_io_memory);
2277 if (init_vga_ports) {
2278 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2279 portio_list_set_flush_coalesced(&s->vga_port_list);
2280 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2281 }
2282 if (vbe_ports) {
2283 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2284 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2285 }
2286 }
2287
2288 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2289 {
2290 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2291 * so use an alias to avoid double-mapping the same region.
2292 */
2293 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2294 &s->vram, 0, memory_region_size(&s->vram));
2295 /* XXX: use optimized standard vga accesses */
2296 memory_region_add_subregion(system_memory,
2297 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2298 &s->vram_vbe);
2299 s->vbe_mapped = 1;
2300 }
QEMU mirror