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Merge remote-tracking branch 'remotes/armbru/tags/pull-build-2019-07-02-v2' into...
[qemu/ar7.git] / hw / display / vga.c
blob910a23c12ef720a0cd9b14ce2b81e3c300015508
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 "qemu/units.h"
26 #include "qapi/error.h"
27 #include "hw/hw.h"
28 #include "hw/display/vga.h"
29 #include "hw/pci/pci.h"
30 #include "vga_int.h"
31 #include "vga_regs.h"
32 #include "ui/pixel_ops.h"
33 #include "qemu/timer.h"
34 #include "hw/xen/xen.h"
35 #include "trace.h"
36
37 //#define DEBUG_VGA_MEM
38 //#define DEBUG_VGA_REG
39
40 /* 16 state changes per vertical frame @60 Hz */
41 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
42
43 /*
44 * Video Graphics Array (VGA)
45 *
46 * Chipset docs for original IBM VGA:
47 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
48 *
49 * FreeVGA site:
50 * http://www.osdever.net/FreeVGA/home.htm
51 *
52 * Standard VGA features and Bochs VBE extensions are implemented.
53 */
54
55 /* force some bits to zero */
56 const uint8_t sr_mask[8] = {
57 0x03,
58 0x3d,
59 0x0f,
60 0x3f,
61 0x0e,
62 0x00,
63 0x00,
64 0xff,
65 };
66
67 const uint8_t gr_mask[16] = {
68 0x0f, /* 0x00 */
69 0x0f, /* 0x01 */
70 0x0f, /* 0x02 */
71 0x1f, /* 0x03 */
72 0x03, /* 0x04 */
73 0x7b, /* 0x05 */
74 0x0f, /* 0x06 */
75 0x0f, /* 0x07 */
76 0xff, /* 0x08 */
77 0x00, /* 0x09 */
78 0x00, /* 0x0a */
79 0x00, /* 0x0b */
80 0x00, /* 0x0c */
81 0x00, /* 0x0d */
82 0x00, /* 0x0e */
83 0x00, /* 0x0f */
84 };
85
86 #define cbswap_32(__x) \
87 ((uint32_t)( \
88 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
89 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
90 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
91 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
92
93 #ifdef HOST_WORDS_BIGENDIAN
94 #define PAT(x) cbswap_32(x)
95 #else
96 #define PAT(x) (x)
97 #endif
98
99 #ifdef HOST_WORDS_BIGENDIAN
100 #define BIG 1
101 #else
102 #define BIG 0
103 #endif
104
105 #ifdef HOST_WORDS_BIGENDIAN
106 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
107 #else
108 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
109 #endif
110
111 static const uint32_t mask16[16] = {
112 PAT(0x00000000),
113 PAT(0x000000ff),
114 PAT(0x0000ff00),
115 PAT(0x0000ffff),
116 PAT(0x00ff0000),
117 PAT(0x00ff00ff),
118 PAT(0x00ffff00),
119 PAT(0x00ffffff),
120 PAT(0xff000000),
121 PAT(0xff0000ff),
122 PAT(0xff00ff00),
123 PAT(0xff00ffff),
124 PAT(0xffff0000),
125 PAT(0xffff00ff),
126 PAT(0xffffff00),
127 PAT(0xffffffff),
128 };
129
130 #undef PAT
131
132 #ifdef HOST_WORDS_BIGENDIAN
133 #define PAT(x) (x)
134 #else
135 #define PAT(x) cbswap_32(x)
136 #endif
137
138 static uint32_t expand4[256];
139 static uint16_t expand2[256];
140 static uint8_t expand4to8[16];
141
142 static void vbe_update_vgaregs(VGACommonState *s);
143
144 static inline bool vbe_enabled(VGACommonState *s)
145 {
146 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
147 }
148
149 static inline uint8_t sr(VGACommonState *s, int idx)
150 {
151 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
152 }
153
154 static void vga_update_memory_access(VGACommonState *s)
155 {
156 hwaddr base, offset, size;
157
158 if (s->legacy_address_space == NULL) {
159 return;
160 }
161
162 if (s->has_chain4_alias) {
163 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
164 object_unparent(OBJECT(&s->chain4_alias));
165 s->has_chain4_alias = false;
166 s->plane_updated = 0xf;
167 }
168 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
169 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
170 offset = 0;
171 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
172 case 0:
173 base = 0xa0000;
174 size = 0x20000;
175 break;
176 case 1:
177 base = 0xa0000;
178 size = 0x10000;
179 offset = s->bank_offset;
180 break;
181 case 2:
182 base = 0xb0000;
183 size = 0x8000;
184 break;
185 case 3:
186 default:
187 base = 0xb8000;
188 size = 0x8000;
189 break;
190 }
191 assert(offset + size <= s->vram_size);
192 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
193 "vga.chain4", &s->vram, offset, size);
194 memory_region_add_subregion_overlap(s->legacy_address_space, base,
195 &s->chain4_alias, 2);
196 s->has_chain4_alias = true;
197 }
198 }
199
200 static void vga_dumb_update_retrace_info(VGACommonState *s)
201 {
202 (void) s;
203 }
204
205 static void vga_precise_update_retrace_info(VGACommonState *s)
206 {
207 int htotal_chars;
208 int hretr_start_char;
209 int hretr_skew_chars;
210 int hretr_end_char;
211
212 int vtotal_lines;
213 int vretr_start_line;
214 int vretr_end_line;
215
216 int dots;
217 #if 0
218 int div2, sldiv2;
219 #endif
220 int clocking_mode;
221 int clock_sel;
222 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
223 int64_t chars_per_sec;
224 struct vga_precise_retrace *r = &s->retrace_info.precise;
225
226 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
227 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
228 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
229 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
230
231 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
232 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
233 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
234 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
235 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
236 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
237 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
238
239 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
240 clock_sel = (s->msr >> 2) & 3;
241 dots = (s->msr & 1) ? 8 : 9;
242
243 chars_per_sec = clk_hz[clock_sel] / dots;
244
245 htotal_chars <<= clocking_mode;
246
247 r->total_chars = vtotal_lines * htotal_chars;
248 if (r->freq) {
249 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
250 } else {
251 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
252 }
253
254 r->vstart = vretr_start_line;
255 r->vend = r->vstart + vretr_end_line + 1;
256
257 r->hstart = hretr_start_char + hretr_skew_chars;
258 r->hend = r->hstart + hretr_end_char + 1;
259 r->htotal = htotal_chars;
260
261 #if 0
262 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
263 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
264 printf (
265 "hz=%f\n"
266 "htotal = %d\n"
267 "hretr_start = %d\n"
268 "hretr_skew = %d\n"
269 "hretr_end = %d\n"
270 "vtotal = %d\n"
271 "vretr_start = %d\n"
272 "vretr_end = %d\n"
273 "div2 = %d sldiv2 = %d\n"
274 "clocking_mode = %d\n"
275 "clock_sel = %d %d\n"
276 "dots = %d\n"
277 "ticks/char = %" PRId64 "\n"
278 "\n",
279 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
280 htotal_chars,
281 hretr_start_char,
282 hretr_skew_chars,
283 hretr_end_char,
284 vtotal_lines,
285 vretr_start_line,
286 vretr_end_line,
287 div2, sldiv2,
288 clocking_mode,
289 clock_sel,
290 clk_hz[clock_sel],
291 dots,
292 r->ticks_per_char
293 );
294 #endif
295 }
296
297 static uint8_t vga_precise_retrace(VGACommonState *s)
298 {
299 struct vga_precise_retrace *r = &s->retrace_info.precise;
300 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
301
302 if (r->total_chars) {
303 int cur_line, cur_line_char, cur_char;
304 int64_t cur_tick;
305
306 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
307
308 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
309 cur_line = cur_char / r->htotal;
310
311 if (cur_line >= r->vstart && cur_line <= r->vend) {
312 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
313 } else {
314 cur_line_char = cur_char % r->htotal;
315 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
316 val |= ST01_DISP_ENABLE;
317 }
318 }
319
320 return val;
321 } else {
322 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
323 }
324 }
325
326 static uint8_t vga_dumb_retrace(VGACommonState *s)
327 {
328 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
329 }
330
331 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
332 {
333 if (s->msr & VGA_MIS_COLOR) {
334 /* Color */
335 return (addr >= 0x3b0 && addr <= 0x3bf);
336 } else {
337 /* Monochrome */
338 return (addr >= 0x3d0 && addr <= 0x3df);
339 }
340 }
341
342 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
343 {
344 VGACommonState *s = opaque;
345 int val, index;
346
347 if (vga_ioport_invalid(s, addr)) {
348 val = 0xff;
349 } else {
350 switch(addr) {
351 case VGA_ATT_W:
352 if (s->ar_flip_flop == 0) {
353 val = s->ar_index;
354 } else {
355 val = 0;
356 }
357 break;
358 case VGA_ATT_R:
359 index = s->ar_index & 0x1f;
360 if (index < VGA_ATT_C) {
361 val = s->ar[index];
362 } else {
363 val = 0;
364 }
365 break;
366 case VGA_MIS_W:
367 val = s->st00;
368 break;
369 case VGA_SEQ_I:
370 val = s->sr_index;
371 break;
372 case VGA_SEQ_D:
373 val = s->sr[s->sr_index];
374 #ifdef DEBUG_VGA_REG
375 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
376 #endif
377 break;
378 case VGA_PEL_IR:
379 val = s->dac_state;
380 break;
381 case VGA_PEL_IW:
382 val = s->dac_write_index;
383 break;
384 case VGA_PEL_D:
385 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
386 if (++s->dac_sub_index == 3) {
387 s->dac_sub_index = 0;
388 s->dac_read_index++;
389 }
390 break;
391 case VGA_FTC_R:
392 val = s->fcr;
393 break;
394 case VGA_MIS_R:
395 val = s->msr;
396 break;
397 case VGA_GFX_I:
398 val = s->gr_index;
399 break;
400 case VGA_GFX_D:
401 val = s->gr[s->gr_index];
402 #ifdef DEBUG_VGA_REG
403 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
404 #endif
405 break;
406 case VGA_CRT_IM:
407 case VGA_CRT_IC:
408 val = s->cr_index;
409 break;
410 case VGA_CRT_DM:
411 case VGA_CRT_DC:
412 val = s->cr[s->cr_index];
413 #ifdef DEBUG_VGA_REG
414 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
415 #endif
416 break;
417 case VGA_IS1_RM:
418 case VGA_IS1_RC:
419 /* just toggle to fool polling */
420 val = s->st01 = s->retrace(s);
421 s->ar_flip_flop = 0;
422 break;
423 default:
424 val = 0x00;
425 break;
426 }
427 }
428 trace_vga_std_read_io(addr, val);
429 return val;
430 }
431
432 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
433 {
434 VGACommonState *s = opaque;
435 int index;
436
437 /* check port range access depending on color/monochrome mode */
438 if (vga_ioport_invalid(s, addr)) {
439 return;
440 }
441 trace_vga_std_write_io(addr, val);
442
443 switch(addr) {
444 case VGA_ATT_W:
445 if (s->ar_flip_flop == 0) {
446 val &= 0x3f;
447 s->ar_index = val;
448 } else {
449 index = s->ar_index & 0x1f;
450 switch(index) {
451 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
452 s->ar[index] = val & 0x3f;
453 break;
454 case VGA_ATC_MODE:
455 s->ar[index] = val & ~0x10;
456 break;
457 case VGA_ATC_OVERSCAN:
458 s->ar[index] = val;
459 break;
460 case VGA_ATC_PLANE_ENABLE:
461 s->ar[index] = val & ~0xc0;
462 break;
463 case VGA_ATC_PEL:
464 s->ar[index] = val & ~0xf0;
465 break;
466 case VGA_ATC_COLOR_PAGE:
467 s->ar[index] = val & ~0xf0;
468 break;
469 default:
470 break;
471 }
472 }
473 s->ar_flip_flop ^= 1;
474 break;
475 case VGA_MIS_W:
476 s->msr = val & ~0x10;
477 s->update_retrace_info(s);
478 break;
479 case VGA_SEQ_I:
480 s->sr_index = val & 7;
481 break;
482 case VGA_SEQ_D:
483 #ifdef DEBUG_VGA_REG
484 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
485 #endif
486 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
487 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
488 s->update_retrace_info(s);
489 }
490 vga_update_memory_access(s);
491 break;
492 case VGA_PEL_IR:
493 s->dac_read_index = val;
494 s->dac_sub_index = 0;
495 s->dac_state = 3;
496 break;
497 case VGA_PEL_IW:
498 s->dac_write_index = val;
499 s->dac_sub_index = 0;
500 s->dac_state = 0;
501 break;
502 case VGA_PEL_D:
503 s->dac_cache[s->dac_sub_index] = val;
504 if (++s->dac_sub_index == 3) {
505 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
506 s->dac_sub_index = 0;
507 s->dac_write_index++;
508 }
509 break;
510 case VGA_GFX_I:
511 s->gr_index = val & 0x0f;
512 break;
513 case VGA_GFX_D:
514 #ifdef DEBUG_VGA_REG
515 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
516 #endif
517 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
518 vbe_update_vgaregs(s);
519 vga_update_memory_access(s);
520 break;
521 case VGA_CRT_IM:
522 case VGA_CRT_IC:
523 s->cr_index = val;
524 break;
525 case VGA_CRT_DM:
526 case VGA_CRT_DC:
527 #ifdef DEBUG_VGA_REG
528 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
529 #endif
530 /* handle CR0-7 protection */
531 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
532 s->cr_index <= VGA_CRTC_OVERFLOW) {
533 /* can always write bit 4 of CR7 */
534 if (s->cr_index == VGA_CRTC_OVERFLOW) {
535 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
536 (val & 0x10);
537 vbe_update_vgaregs(s);
538 }
539 return;
540 }
541 s->cr[s->cr_index] = val;
542 vbe_update_vgaregs(s);
543
544 switch(s->cr_index) {
545 case VGA_CRTC_H_TOTAL:
546 case VGA_CRTC_H_SYNC_START:
547 case VGA_CRTC_H_SYNC_END:
548 case VGA_CRTC_V_TOTAL:
549 case VGA_CRTC_OVERFLOW:
550 case VGA_CRTC_V_SYNC_END:
551 case VGA_CRTC_MODE:
552 s->update_retrace_info(s);
553 break;
554 }
555 break;
556 case VGA_IS1_RM:
557 case VGA_IS1_RC:
558 s->fcr = val & 0x10;
559 break;
560 }
561 }
562
563 /*
564 * Sanity check vbe register writes.
565 *
566 * As we don't have a way to signal errors to the guest in the bochs
567 * dispi interface we'll go adjust the registers to the closest valid
568 * value.
569 */
570 static void vbe_fixup_regs(VGACommonState *s)
571 {
572 uint16_t *r = s->vbe_regs;
573 uint32_t bits, linelength, maxy, offset;
574
575 if (!vbe_enabled(s)) {
576 /* vbe is turned off -- nothing to do */
577 return;
578 }
579
580 /* check depth */
581 switch (r[VBE_DISPI_INDEX_BPP]) {
582 case 4:
583 case 8:
584 case 16:
585 case 24:
586 case 32:
587 bits = r[VBE_DISPI_INDEX_BPP];
588 break;
589 case 15:
590 bits = 16;
591 break;
592 default:
593 bits = r[VBE_DISPI_INDEX_BPP] = 8;
594 break;
595 }
596
597 /* check width */
598 r[VBE_DISPI_INDEX_XRES] &= ~7u;
599 if (r[VBE_DISPI_INDEX_XRES] == 0) {
600 r[VBE_DISPI_INDEX_XRES] = 8;
601 }
602 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
603 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
604 }
605 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
606 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
607 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
608 }
609 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
610 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
611 }
612
613 /* check height */
614 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
615 maxy = s->vbe_size / linelength;
616 if (r[VBE_DISPI_INDEX_YRES] == 0) {
617 r[VBE_DISPI_INDEX_YRES] = 1;
618 }
619 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
620 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
621 }
622 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
623 r[VBE_DISPI_INDEX_YRES] = maxy;
624 }
625
626 /* check offset */
627 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
628 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
629 }
630 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
631 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
632 }
633 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
634 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
635 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
636 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
637 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
638 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
639 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
640 offset = 0;
641 }
642 }
643
644 /* update vga state */
645 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
646 s->vbe_line_offset = linelength;
647 s->vbe_start_addr = offset / 4;
648 }
649
650 /* we initialize the VGA graphic mode */
651 static void vbe_update_vgaregs(VGACommonState *s)
652 {
653 int h, shift_control;
654
655 if (!vbe_enabled(s)) {
656 /* vbe is turned off -- nothing to do */
657 return;
658 }
659
660 /* graphic mode + memory map 1 */
661 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
662 VGA_GR06_GRAPHICS_MODE;
663 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
664 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
665 /* width */
666 s->cr[VGA_CRTC_H_DISP] =
667 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
668 /* height (only meaningful if < 1024) */
669 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
670 s->cr[VGA_CRTC_V_DISP_END] = h;
671 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
672 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
673 /* line compare to 1023 */
674 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
675 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
676 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
677
678 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
679 shift_control = 0;
680 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
681 } else {
682 shift_control = 2;
683 /* set chain 4 mode */
684 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
685 /* activate all planes */
686 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
687 }
688 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
689 (shift_control << 5);
690 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
691 }
692
693 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
694 {
695 VGACommonState *s = opaque;
696 return s->vbe_index;
697 }
698
699 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
700 {
701 VGACommonState *s = opaque;
702 uint32_t val;
703
704 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
705 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
706 switch(s->vbe_index) {
707 /* XXX: do not hardcode ? */
708 case VBE_DISPI_INDEX_XRES:
709 val = VBE_DISPI_MAX_XRES;
710 break;
711 case VBE_DISPI_INDEX_YRES:
712 val = VBE_DISPI_MAX_YRES;
713 break;
714 case VBE_DISPI_INDEX_BPP:
715 val = VBE_DISPI_MAX_BPP;
716 break;
717 default:
718 val = s->vbe_regs[s->vbe_index];
719 break;
720 }
721 } else {
722 val = s->vbe_regs[s->vbe_index];
723 }
724 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
725 val = s->vbe_size / (64 * KiB);
726 } else {
727 val = 0;
728 }
729 trace_vga_vbe_read(s->vbe_index, val);
730 return val;
731 }
732
733 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
734 {
735 VGACommonState *s = opaque;
736 s->vbe_index = val;
737 }
738
739 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
740 {
741 VGACommonState *s = opaque;
742
743 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
744 trace_vga_vbe_write(s->vbe_index, val);
745 switch(s->vbe_index) {
746 case VBE_DISPI_INDEX_ID:
747 if (val == VBE_DISPI_ID0 ||
748 val == VBE_DISPI_ID1 ||
749 val == VBE_DISPI_ID2 ||
750 val == VBE_DISPI_ID3 ||
751 val == VBE_DISPI_ID4) {
752 s->vbe_regs[s->vbe_index] = val;
753 }
754 break;
755 case VBE_DISPI_INDEX_XRES:
756 case VBE_DISPI_INDEX_YRES:
757 case VBE_DISPI_INDEX_BPP:
758 case VBE_DISPI_INDEX_VIRT_WIDTH:
759 case VBE_DISPI_INDEX_X_OFFSET:
760 case VBE_DISPI_INDEX_Y_OFFSET:
761 s->vbe_regs[s->vbe_index] = val;
762 vbe_fixup_regs(s);
763 vbe_update_vgaregs(s);
764 break;
765 case VBE_DISPI_INDEX_BANK:
766 val &= s->vbe_bank_mask;
767 s->vbe_regs[s->vbe_index] = val;
768 s->bank_offset = (val << 16);
769 vga_update_memory_access(s);
770 break;
771 case VBE_DISPI_INDEX_ENABLE:
772 if ((val & VBE_DISPI_ENABLED) &&
773 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
774
775 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
776 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
777 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
778 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
779 vbe_fixup_regs(s);
780 vbe_update_vgaregs(s);
781
782 /* clear the screen */
783 if (!(val & VBE_DISPI_NOCLEARMEM)) {
784 memset(s->vram_ptr, 0,
785 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
786 }
787 } else {
788 s->bank_offset = 0;
789 }
790 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
791 s->vbe_regs[s->vbe_index] = val;
792 vga_update_memory_access(s);
793 break;
794 default:
795 break;
796 }
797 }
798 }
799
800 /* called for accesses between 0xa0000 and 0xc0000 */
801 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
802 {
803 int memory_map_mode, plane;
804 uint32_t ret;
805
806 /* convert to VGA memory offset */
807 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
808 addr &= 0x1ffff;
809 switch(memory_map_mode) {
810 case 0:
811 break;
812 case 1:
813 if (addr >= 0x10000)
814 return 0xff;
815 addr += s->bank_offset;
816 break;
817 case 2:
818 addr -= 0x10000;
819 if (addr >= 0x8000)
820 return 0xff;
821 break;
822 default:
823 case 3:
824 addr -= 0x18000;
825 if (addr >= 0x8000)
826 return 0xff;
827 break;
828 }
829
830 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
831 /* chain 4 mode : simplest access */
832 assert(addr < s->vram_size);
833 ret = s->vram_ptr[addr];
834 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
835 /* odd/even mode (aka text mode mapping) */
836 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
837 addr = ((addr & ~1) << 1) | plane;
838 if (addr >= s->vram_size) {
839 return 0xff;
840 }
841 ret = s->vram_ptr[addr];
842 } else {
843 /* standard VGA latched access */
844 if (addr * sizeof(uint32_t) >= s->vram_size) {
845 return 0xff;
846 }
847 s->latch = ((uint32_t *)s->vram_ptr)[addr];
848
849 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
850 /* read mode 0 */
851 plane = s->gr[VGA_GFX_PLANE_READ];
852 ret = GET_PLANE(s->latch, plane);
853 } else {
854 /* read mode 1 */
855 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
856 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
857 ret |= ret >> 16;
858 ret |= ret >> 8;
859 ret = (~ret) & 0xff;
860 }
861 }
862 return ret;
863 }
864
865 /* called for accesses between 0xa0000 and 0xc0000 */
866 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
867 {
868 int memory_map_mode, plane, write_mode, b, func_select, mask;
869 uint32_t write_mask, bit_mask, set_mask;
870
871 #ifdef DEBUG_VGA_MEM
872 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
873 #endif
874 /* convert to VGA memory offset */
875 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
876 addr &= 0x1ffff;
877 switch(memory_map_mode) {
878 case 0:
879 break;
880 case 1:
881 if (addr >= 0x10000)
882 return;
883 addr += s->bank_offset;
884 break;
885 case 2:
886 addr -= 0x10000;
887 if (addr >= 0x8000)
888 return;
889 break;
890 default:
891 case 3:
892 addr -= 0x18000;
893 if (addr >= 0x8000)
894 return;
895 break;
896 }
897
898 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
899 /* chain 4 mode : simplest access */
900 plane = addr & 3;
901 mask = (1 << plane);
902 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
903 assert(addr < s->vram_size);
904 s->vram_ptr[addr] = val;
905 #ifdef DEBUG_VGA_MEM
906 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
907 #endif
908 s->plane_updated |= mask; /* only used to detect font change */
909 memory_region_set_dirty(&s->vram, addr, 1);
910 }
911 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
912 /* odd/even mode (aka text mode mapping) */
913 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
914 mask = (1 << plane);
915 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
916 addr = ((addr & ~1) << 1) | plane;
917 if (addr >= s->vram_size) {
918 return;
919 }
920 s->vram_ptr[addr] = val;
921 #ifdef DEBUG_VGA_MEM
922 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
923 #endif
924 s->plane_updated |= mask; /* only used to detect font change */
925 memory_region_set_dirty(&s->vram, addr, 1);
926 }
927 } else {
928 /* standard VGA latched access */
929 write_mode = s->gr[VGA_GFX_MODE] & 3;
930 switch(write_mode) {
931 default:
932 case 0:
933 /* rotate */
934 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
935 val = ((val >> b) | (val << (8 - b))) & 0xff;
936 val |= val << 8;
937 val |= val << 16;
938
939 /* apply set/reset mask */
940 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
941 val = (val & ~set_mask) |
942 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
943 bit_mask = s->gr[VGA_GFX_BIT_MASK];
944 break;
945 case 1:
946 val = s->latch;
947 goto do_write;
948 case 2:
949 val = mask16[val & 0x0f];
950 bit_mask = s->gr[VGA_GFX_BIT_MASK];
951 break;
952 case 3:
953 /* rotate */
954 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
955 val = (val >> b) | (val << (8 - b));
956
957 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
958 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
959 break;
960 }
961
962 /* apply logical operation */
963 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
964 switch(func_select) {
965 case 0:
966 default:
967 /* nothing to do */
968 break;
969 case 1:
970 /* and */
971 val &= s->latch;
972 break;
973 case 2:
974 /* or */
975 val |= s->latch;
976 break;
977 case 3:
978 /* xor */
979 val ^= s->latch;
980 break;
981 }
982
983 /* apply bit mask */
984 bit_mask |= bit_mask << 8;
985 bit_mask |= bit_mask << 16;
986 val = (val & bit_mask) | (s->latch & ~bit_mask);
987
988 do_write:
989 /* mask data according to sr[2] */
990 mask = sr(s, VGA_SEQ_PLANE_WRITE);
991 s->plane_updated |= mask; /* only used to detect font change */
992 write_mask = mask16[mask];
993 if (addr * sizeof(uint32_t) >= s->vram_size) {
994 return;
995 }
996 ((uint32_t *)s->vram_ptr)[addr] =
997 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
998 (val & write_mask);
999 #ifdef DEBUG_VGA_MEM
1000 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1001 addr * 4, write_mask, val);
1002 #endif
1003 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1004 }
1005 }
1006
1007 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1008 uint32_t srcaddr, int width);
1009
1010 #include "vga-helpers.h"
1011
1012 /* return true if the palette was modified */
1013 static int update_palette16(VGACommonState *s)
1014 {
1015 int full_update, i;
1016 uint32_t v, col, *palette;
1017
1018 full_update = 0;
1019 palette = s->last_palette;
1020 for(i = 0; i < 16; i++) {
1021 v = s->ar[i];
1022 if (s->ar[VGA_ATC_MODE] & 0x80) {
1023 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1024 } else {
1025 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1026 }
1027 v = v * 3;
1028 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1029 c6_to_8(s->palette[v + 1]),
1030 c6_to_8(s->palette[v + 2]));
1031 if (col != palette[i]) {
1032 full_update = 1;
1033 palette[i] = col;
1034 }
1035 }
1036 return full_update;
1037 }
1038
1039 /* return true if the palette was modified */
1040 static int update_palette256(VGACommonState *s)
1041 {
1042 int full_update, i;
1043 uint32_t v, col, *palette;
1044
1045 full_update = 0;
1046 palette = s->last_palette;
1047 v = 0;
1048 for(i = 0; i < 256; i++) {
1049 if (s->dac_8bit) {
1050 col = rgb_to_pixel32(s->palette[v],
1051 s->palette[v + 1],
1052 s->palette[v + 2]);
1053 } else {
1054 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1055 c6_to_8(s->palette[v + 1]),
1056 c6_to_8(s->palette[v + 2]));
1057 }
1058 if (col != palette[i]) {
1059 full_update = 1;
1060 palette[i] = col;
1061 }
1062 v += 3;
1063 }
1064 return full_update;
1065 }
1066
1067 static void vga_get_offsets(VGACommonState *s,
1068 uint32_t *pline_offset,
1069 uint32_t *pstart_addr,
1070 uint32_t *pline_compare)
1071 {
1072 uint32_t start_addr, line_offset, line_compare;
1073
1074 if (vbe_enabled(s)) {
1075 line_offset = s->vbe_line_offset;
1076 start_addr = s->vbe_start_addr;
1077 line_compare = 65535;
1078 } else {
1079 /* compute line_offset in bytes */
1080 line_offset = s->cr[VGA_CRTC_OFFSET];
1081 line_offset <<= 3;
1082
1083 /* starting address */
1084 start_addr = s->cr[VGA_CRTC_START_LO] |
1085 (s->cr[VGA_CRTC_START_HI] << 8);
1086
1087 /* line compare */
1088 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1089 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1090 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1091 }
1092 *pline_offset = line_offset;
1093 *pstart_addr = start_addr;
1094 *pline_compare = line_compare;
1095 }
1096
1097 /* update start_addr and line_offset. Return TRUE if modified */
1098 static int update_basic_params(VGACommonState *s)
1099 {
1100 int full_update;
1101 uint32_t start_addr, line_offset, line_compare;
1102
1103 full_update = 0;
1104
1105 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1106
1107 if (line_offset != s->line_offset ||
1108 start_addr != s->start_addr ||
1109 line_compare != s->line_compare) {
1110 s->line_offset = line_offset;
1111 s->start_addr = start_addr;
1112 s->line_compare = line_compare;
1113 full_update = 1;
1114 }
1115 return full_update;
1116 }
1117
1118
1119 static const uint8_t cursor_glyph[32 * 4] = {
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 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1136 };
1137
1138 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1139 int *pcwidth, int *pcheight)
1140 {
1141 int width, cwidth, height, cheight;
1142
1143 /* total width & height */
1144 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1145 cwidth = 8;
1146 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1147 cwidth = 9;
1148 }
1149 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1150 cwidth = 16; /* NOTE: no 18 pixel wide */
1151 }
1152 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1153 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1154 /* ugly hack for CGA 160x100x16 - explain me the logic */
1155 height = 100;
1156 } else {
1157 height = s->cr[VGA_CRTC_V_DISP_END] |
1158 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1159 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1160 height = (height + 1) / cheight;
1161 }
1162
1163 *pwidth = width;
1164 *pheight = height;
1165 *pcwidth = cwidth;
1166 *pcheight = cheight;
1167 }
1168
1169 /*
1170 * Text mode update
1171 * Missing:
1172 * - double scan
1173 * - double width
1174 * - underline
1175 * - flashing
1176 */
1177 static void vga_draw_text(VGACommonState *s, int full_update)
1178 {
1179 DisplaySurface *surface = qemu_console_surface(s->con);
1180 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1181 int cx_min, cx_max, linesize, x_incr, line, line1;
1182 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1183 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1184 const uint8_t *font_ptr, *font_base[2];
1185 int dup9, line_offset;
1186 uint32_t *palette;
1187 uint32_t *ch_attr_ptr;
1188 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1189
1190 /* compute font data address (in plane 2) */
1191 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1192 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1193 if (offset != s->font_offsets[0]) {
1194 s->font_offsets[0] = offset;
1195 full_update = 1;
1196 }
1197 font_base[0] = s->vram_ptr + offset;
1198
1199 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1200 font_base[1] = s->vram_ptr + offset;
1201 if (offset != s->font_offsets[1]) {
1202 s->font_offsets[1] = offset;
1203 full_update = 1;
1204 }
1205 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1206 /* if the plane 2 was modified since the last display, it
1207 indicates the font may have been modified */
1208 s->plane_updated = 0;
1209 full_update = 1;
1210 }
1211 full_update |= update_basic_params(s);
1212
1213 line_offset = s->line_offset;
1214
1215 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1216 if ((height * width) <= 1) {
1217 /* better than nothing: exit if transient size is too small */
1218 return;
1219 }
1220 if ((height * width) > CH_ATTR_SIZE) {
1221 /* better than nothing: exit if transient size is too big */
1222 return;
1223 }
1224
1225 if (width != s->last_width || height != s->last_height ||
1226 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1227 s->last_scr_width = width * cw;
1228 s->last_scr_height = height * cheight;
1229 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1230 surface = qemu_console_surface(s->con);
1231 dpy_text_resize(s->con, width, height);
1232 s->last_depth = 0;
1233 s->last_width = width;
1234 s->last_height = height;
1235 s->last_ch = cheight;
1236 s->last_cw = cw;
1237 full_update = 1;
1238 }
1239 full_update |= update_palette16(s);
1240 palette = s->last_palette;
1241 x_incr = cw * surface_bytes_per_pixel(surface);
1242
1243 if (full_update) {
1244 s->full_update_text = 1;
1245 }
1246 if (s->full_update_gfx) {
1247 s->full_update_gfx = 0;
1248 full_update |= 1;
1249 }
1250
1251 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1252 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1253 if (cursor_offset != s->cursor_offset ||
1254 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1255 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1256 /* if the cursor position changed, we update the old and new
1257 chars */
1258 if (s->cursor_offset < CH_ATTR_SIZE)
1259 s->last_ch_attr[s->cursor_offset] = -1;
1260 if (cursor_offset < CH_ATTR_SIZE)
1261 s->last_ch_attr[cursor_offset] = -1;
1262 s->cursor_offset = cursor_offset;
1263 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1264 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1265 }
1266 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1267 if (now >= s->cursor_blink_time) {
1268 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1269 s->cursor_visible_phase = !s->cursor_visible_phase;
1270 }
1271
1272 dest = surface_data(surface);
1273 linesize = surface_stride(surface);
1274 ch_attr_ptr = s->last_ch_attr;
1275 line = 0;
1276 offset = s->start_addr * 4;
1277 for(cy = 0; cy < height; cy++) {
1278 d1 = dest;
1279 src = s->vram_ptr + offset;
1280 cx_min = width;
1281 cx_max = -1;
1282 for(cx = 0; cx < width; cx++) {
1283 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) {
1284 break;
1285 }
1286 ch_attr = *(uint16_t *)src;
1287 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1288 if (cx < cx_min)
1289 cx_min = cx;
1290 if (cx > cx_max)
1291 cx_max = cx;
1292 *ch_attr_ptr = ch_attr;
1293 #ifdef HOST_WORDS_BIGENDIAN
1294 ch = ch_attr >> 8;
1295 cattr = ch_attr & 0xff;
1296 #else
1297 ch = ch_attr & 0xff;
1298 cattr = ch_attr >> 8;
1299 #endif
1300 font_ptr = font_base[(cattr >> 3) & 1];
1301 font_ptr += 32 * 4 * ch;
1302 bgcol = palette[cattr >> 4];
1303 fgcol = palette[cattr & 0x0f];
1304 if (cw == 16) {
1305 vga_draw_glyph16(d1, linesize,
1306 font_ptr, cheight, fgcol, bgcol);
1307 } else if (cw != 9) {
1308 vga_draw_glyph8(d1, linesize,
1309 font_ptr, cheight, fgcol, bgcol);
1310 } else {
1311 dup9 = 0;
1312 if (ch >= 0xb0 && ch <= 0xdf &&
1313 (s->ar[VGA_ATC_MODE] & 0x04)) {
1314 dup9 = 1;
1315 }
1316 vga_draw_glyph9(d1, linesize,
1317 font_ptr, cheight, fgcol, bgcol, dup9);
1318 }
1319 if (src == cursor_ptr &&
1320 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1321 s->cursor_visible_phase) {
1322 int line_start, line_last, h;
1323 /* draw the cursor */
1324 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1325 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1326 /* XXX: check that */
1327 if (line_last > cheight - 1)
1328 line_last = cheight - 1;
1329 if (line_last >= line_start && line_start < cheight) {
1330 h = line_last - line_start + 1;
1331 d = d1 + linesize * line_start;
1332 if (cw == 16) {
1333 vga_draw_glyph16(d, linesize,
1334 cursor_glyph, h, fgcol, bgcol);
1335 } else if (cw != 9) {
1336 vga_draw_glyph8(d, linesize,
1337 cursor_glyph, h, fgcol, bgcol);
1338 } else {
1339 vga_draw_glyph9(d, linesize,
1340 cursor_glyph, h, fgcol, bgcol, 1);
1341 }
1342 }
1343 }
1344 }
1345 d1 += x_incr;
1346 src += 4;
1347 ch_attr_ptr++;
1348 }
1349 if (cx_max != -1) {
1350 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1351 (cx_max - cx_min + 1) * cw, cheight);
1352 }
1353 dest += linesize * cheight;
1354 line1 = line + cheight;
1355 offset += line_offset;
1356 if (line < s->line_compare && line1 >= s->line_compare) {
1357 offset = 0;
1358 }
1359 line = line1;
1360 }
1361 }
1362
1363 enum {
1364 VGA_DRAW_LINE2,
1365 VGA_DRAW_LINE2D2,
1366 VGA_DRAW_LINE4,
1367 VGA_DRAW_LINE4D2,
1368 VGA_DRAW_LINE8D2,
1369 VGA_DRAW_LINE8,
1370 VGA_DRAW_LINE15_LE,
1371 VGA_DRAW_LINE16_LE,
1372 VGA_DRAW_LINE24_LE,
1373 VGA_DRAW_LINE32_LE,
1374 VGA_DRAW_LINE15_BE,
1375 VGA_DRAW_LINE16_BE,
1376 VGA_DRAW_LINE24_BE,
1377 VGA_DRAW_LINE32_BE,
1378 VGA_DRAW_LINE_NB,
1379 };
1380
1381 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1382 vga_draw_line2,
1383 vga_draw_line2d2,
1384 vga_draw_line4,
1385 vga_draw_line4d2,
1386 vga_draw_line8d2,
1387 vga_draw_line8,
1388 vga_draw_line15_le,
1389 vga_draw_line16_le,
1390 vga_draw_line24_le,
1391 vga_draw_line32_le,
1392 vga_draw_line15_be,
1393 vga_draw_line16_be,
1394 vga_draw_line24_be,
1395 vga_draw_line32_be,
1396 };
1397
1398 static int vga_get_bpp(VGACommonState *s)
1399 {
1400 int ret;
1401
1402 if (vbe_enabled(s)) {
1403 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1404 } else {
1405 ret = 0;
1406 }
1407 return ret;
1408 }
1409
1410 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1411 {
1412 int width, height;
1413
1414 if (vbe_enabled(s)) {
1415 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1416 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1417 } else {
1418 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1419 height = s->cr[VGA_CRTC_V_DISP_END] |
1420 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1421 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1422 height = (height + 1);
1423 }
1424 *pwidth = width;
1425 *pheight = height;
1426 }
1427
1428 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1429 {
1430 int y;
1431 if (y1 >= VGA_MAX_HEIGHT)
1432 return;
1433 if (y2 >= VGA_MAX_HEIGHT)
1434 y2 = VGA_MAX_HEIGHT;
1435 for(y = y1; y < y2; y++) {
1436 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1437 }
1438 }
1439
1440 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1441 {
1442 if (y >= VGA_MAX_HEIGHT) {
1443 return false;
1444 }
1445 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1446 }
1447
1448 void vga_dirty_log_start(VGACommonState *s)
1449 {
1450 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1451 }
1452
1453 void vga_dirty_log_stop(VGACommonState *s)
1454 {
1455 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1456 }
1457
1458 /*
1459 * graphic modes
1460 */
1461 static void vga_draw_graphic(VGACommonState *s, int full_update)
1462 {
1463 DisplaySurface *surface = qemu_console_surface(s->con);
1464 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1465 int width, height, shift_control, bwidth, bits;
1466 ram_addr_t page0, page1, region_start, region_end;
1467 DirtyBitmapSnapshot *snap = NULL;
1468 int disp_width, multi_scan, multi_run;
1469 uint8_t *d;
1470 uint32_t v, addr1, addr;
1471 vga_draw_line_func *vga_draw_line = NULL;
1472 bool share_surface, force_shadow = false;
1473 pixman_format_code_t format;
1474 #ifdef HOST_WORDS_BIGENDIAN
1475 bool byteswap = !s->big_endian_fb;
1476 #else
1477 bool byteswap = s->big_endian_fb;
1478 #endif
1479
1480 full_update |= update_basic_params(s);
1481
1482 s->get_resolution(s, &width, &height);
1483 disp_width = width;
1484 depth = s->get_bpp(s);
1485
1486 region_start = (s->start_addr * 4);
1487 region_end = region_start + (ram_addr_t)s->line_offset * height;
1488 region_end += width * depth / 8; /* scanline length */
1489 region_end -= s->line_offset;
1490 if (region_end > s->vbe_size || depth == 0 || depth == 15) {
1491 /*
1492 * We land here on:
1493 * - wraps around (can happen with cirrus vbe modes)
1494 * - depth == 0 (256 color palette video mode)
1495 * - depth == 15
1496 *
1497 * Take the safe and slow route:
1498 * - create a dirty bitmap snapshot for all vga memory.
1499 * - force shadowing (so all vga memory access goes
1500 * through vga_read_*() helpers).
1501 *
1502 * Given this affects only vga features which are pretty much
1503 * unused by modern guests there should be no performance
1504 * impact.
1505 */
1506 region_start = 0;
1507 region_end = s->vbe_size;
1508 force_shadow = true;
1509 }
1510
1511 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1512 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1513 if (shift_control != 1) {
1514 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1515 - 1;
1516 } else {
1517 /* in CGA modes, multi_scan is ignored */
1518 /* XXX: is it correct ? */
1519 multi_scan = double_scan;
1520 }
1521 multi_run = multi_scan;
1522 if (shift_control != s->shift_control ||
1523 double_scan != s->double_scan) {
1524 full_update = 1;
1525 s->shift_control = shift_control;
1526 s->double_scan = double_scan;
1527 }
1528
1529 if (shift_control == 0) {
1530 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1531 disp_width <<= 1;
1532 }
1533 } else if (shift_control == 1) {
1534 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1535 disp_width <<= 1;
1536 }
1537 }
1538
1539 /*
1540 * Check whether we can share the surface with the backend
1541 * or whether we need a shadow surface. We share native
1542 * endian surfaces for 15bpp and above and byteswapped
1543 * surfaces for 24bpp and above.
1544 */
1545 format = qemu_default_pixman_format(depth, !byteswap);
1546 if (format) {
1547 share_surface = dpy_gfx_check_format(s->con, format)
1548 && !s->force_shadow && !force_shadow;
1549 } else {
1550 share_surface = false;
1551 }
1552
1553 if (s->line_offset != s->last_line_offset ||
1554 disp_width != s->last_width ||
1555 height != s->last_height ||
1556 s->last_depth != depth ||
1557 s->last_byteswap != byteswap ||
1558 share_surface != is_buffer_shared(surface)) {
1559 /* display parameters changed -> need new display surface */
1560 s->last_scr_width = disp_width;
1561 s->last_scr_height = height;
1562 s->last_width = disp_width;
1563 s->last_height = height;
1564 s->last_line_offset = s->line_offset;
1565 s->last_depth = depth;
1566 s->last_byteswap = byteswap;
1567 full_update = 1;
1568 }
1569 if (surface_data(surface) != s->vram_ptr + (s->start_addr * 4)
1570 && is_buffer_shared(surface)) {
1571 /* base address changed (page flip) -> shared display surfaces
1572 * must be updated with the new base address */
1573 full_update = 1;
1574 }
1575
1576 if (full_update) {
1577 if (share_surface) {
1578 surface = qemu_create_displaysurface_from(disp_width,
1579 height, format, s->line_offset,
1580 s->vram_ptr + (s->start_addr * 4));
1581 dpy_gfx_replace_surface(s->con, surface);
1582 } else {
1583 qemu_console_resize(s->con, disp_width, height);
1584 surface = qemu_console_surface(s->con);
1585 }
1586 }
1587
1588 if (shift_control == 0) {
1589 full_update |= update_palette16(s);
1590 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1591 v = VGA_DRAW_LINE4D2;
1592 } else {
1593 v = VGA_DRAW_LINE4;
1594 }
1595 bits = 4;
1596 } else if (shift_control == 1) {
1597 full_update |= update_palette16(s);
1598 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1599 v = VGA_DRAW_LINE2D2;
1600 } else {
1601 v = VGA_DRAW_LINE2;
1602 }
1603 bits = 4;
1604 } else {
1605 switch(s->get_bpp(s)) {
1606 default:
1607 case 0:
1608 full_update |= update_palette256(s);
1609 v = VGA_DRAW_LINE8D2;
1610 bits = 4;
1611 break;
1612 case 8:
1613 full_update |= update_palette256(s);
1614 v = VGA_DRAW_LINE8;
1615 bits = 8;
1616 break;
1617 case 15:
1618 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1619 bits = 16;
1620 break;
1621 case 16:
1622 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1623 bits = 16;
1624 break;
1625 case 24:
1626 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1627 bits = 24;
1628 break;
1629 case 32:
1630 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1631 bits = 32;
1632 break;
1633 }
1634 }
1635 vga_draw_line = vga_draw_line_table[v];
1636
1637 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1638 s->cursor_invalidate(s);
1639 }
1640
1641 #if 0
1642 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",
1643 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1644 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1645 #endif
1646 addr1 = (s->start_addr * 4);
1647 bwidth = DIV_ROUND_UP(width * bits, 8);
1648 y_start = -1;
1649 d = surface_data(surface);
1650 linesize = surface_stride(surface);
1651 y1 = 0;
1652
1653 if (!full_update) {
1654 if (s->line_compare < height) {
1655 /* split screen mode */
1656 region_start = 0;
1657 }
1658 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1659 region_end - region_start,
1660 DIRTY_MEMORY_VGA);
1661 }
1662
1663 for(y = 0; y < height; y++) {
1664 addr = addr1;
1665 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1666 int shift;
1667 /* CGA compatibility handling */
1668 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1669 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1670 }
1671 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1672 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1673 }
1674 update = full_update;
1675 page0 = addr & s->vbe_size_mask;
1676 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1677 if (full_update) {
1678 update = 1;
1679 } else if (page1 < page0) {
1680 /* scanline wraps from end of video memory to the start */
1681 assert(force_shadow);
1682 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1683 page0, s->vbe_size - page0);
1684 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1685 0, page1);
1686 } else {
1687 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1688 page0, page1 - page0);
1689 }
1690 /* explicit invalidation for the hardware cursor (cirrus only) */
1691 update |= vga_scanline_invalidated(s, y);
1692 if (update) {
1693 if (y_start < 0)
1694 y_start = y;
1695 if (!(is_buffer_shared(surface))) {
1696 vga_draw_line(s, d, addr, width);
1697 if (s->cursor_draw_line)
1698 s->cursor_draw_line(s, d, y);
1699 }
1700 } else {
1701 if (y_start >= 0) {
1702 /* flush to display */
1703 dpy_gfx_update(s->con, 0, y_start,
1704 disp_width, y - y_start);
1705 y_start = -1;
1706 }
1707 }
1708 if (!multi_run) {
1709 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1710 if ((y1 & mask) == mask)
1711 addr1 += s->line_offset;
1712 y1++;
1713 multi_run = multi_scan;
1714 } else {
1715 multi_run--;
1716 }
1717 /* line compare acts on the displayed lines */
1718 if (y == s->line_compare)
1719 addr1 = 0;
1720 d += linesize;
1721 }
1722 if (y_start >= 0) {
1723 /* flush to display */
1724 dpy_gfx_update(s->con, 0, y_start,
1725 disp_width, y - y_start);
1726 }
1727 g_free(snap);
1728 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1729 }
1730
1731 static void vga_draw_blank(VGACommonState *s, int full_update)
1732 {
1733 DisplaySurface *surface = qemu_console_surface(s->con);
1734 int i, w;
1735 uint8_t *d;
1736
1737 if (!full_update)
1738 return;
1739 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1740 return;
1741
1742 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1743 d = surface_data(surface);
1744 for(i = 0; i < s->last_scr_height; i++) {
1745 memset(d, 0, w);
1746 d += surface_stride(surface);
1747 }
1748 dpy_gfx_update_full(s->con);
1749 }
1750
1751 #define GMODE_TEXT 0
1752 #define GMODE_GRAPH 1
1753 #define GMODE_BLANK 2
1754
1755 static void vga_update_display(void *opaque)
1756 {
1757 VGACommonState *s = opaque;
1758 DisplaySurface *surface = qemu_console_surface(s->con);
1759 int full_update, graphic_mode;
1760
1761 qemu_flush_coalesced_mmio_buffer();
1762
1763 if (surface_bits_per_pixel(surface) == 0) {
1764 /* nothing to do */
1765 } else {
1766 full_update = 0;
1767 if (!(s->ar_index & 0x20)) {
1768 graphic_mode = GMODE_BLANK;
1769 } else {
1770 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1771 }
1772 if (graphic_mode != s->graphic_mode) {
1773 s->graphic_mode = graphic_mode;
1774 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1775 full_update = 1;
1776 }
1777 switch(graphic_mode) {
1778 case GMODE_TEXT:
1779 vga_draw_text(s, full_update);
1780 break;
1781 case GMODE_GRAPH:
1782 vga_draw_graphic(s, full_update);
1783 break;
1784 case GMODE_BLANK:
1785 default:
1786 vga_draw_blank(s, full_update);
1787 break;
1788 }
1789 }
1790 }
1791
1792 /* force a full display refresh */
1793 static void vga_invalidate_display(void *opaque)
1794 {
1795 VGACommonState *s = opaque;
1796
1797 s->last_width = -1;
1798 s->last_height = -1;
1799 }
1800
1801 void vga_common_reset(VGACommonState *s)
1802 {
1803 s->sr_index = 0;
1804 memset(s->sr, '\0', sizeof(s->sr));
1805 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1806 s->gr_index = 0;
1807 memset(s->gr, '\0', sizeof(s->gr));
1808 s->ar_index = 0;
1809 memset(s->ar, '\0', sizeof(s->ar));
1810 s->ar_flip_flop = 0;
1811 s->cr_index = 0;
1812 memset(s->cr, '\0', sizeof(s->cr));
1813 s->msr = 0;
1814 s->fcr = 0;
1815 s->st00 = 0;
1816 s->st01 = 0;
1817 s->dac_state = 0;
1818 s->dac_sub_index = 0;
1819 s->dac_read_index = 0;
1820 s->dac_write_index = 0;
1821 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1822 s->dac_8bit = 0;
1823 memset(s->palette, '\0', sizeof(s->palette));
1824 s->bank_offset = 0;
1825 s->vbe_index = 0;
1826 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1827 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1828 s->vbe_start_addr = 0;
1829 s->vbe_line_offset = 0;
1830 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1831 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1832 s->graphic_mode = -1; /* force full update */
1833 s->shift_control = 0;
1834 s->double_scan = 0;
1835 s->line_offset = 0;
1836 s->line_compare = 0;
1837 s->start_addr = 0;
1838 s->plane_updated = 0;
1839 s->last_cw = 0;
1840 s->last_ch = 0;
1841 s->last_width = 0;
1842 s->last_height = 0;
1843 s->last_scr_width = 0;
1844 s->last_scr_height = 0;
1845 s->cursor_start = 0;
1846 s->cursor_end = 0;
1847 s->cursor_offset = 0;
1848 s->big_endian_fb = s->default_endian_fb;
1849 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1850 memset(s->last_palette, '\0', sizeof(s->last_palette));
1851 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1852 switch (vga_retrace_method) {
1853 case VGA_RETRACE_DUMB:
1854 break;
1855 case VGA_RETRACE_PRECISE:
1856 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1857 break;
1858 }
1859 vga_update_memory_access(s);
1860 }
1861
1862 static void vga_reset(void *opaque)
1863 {
1864 VGACommonState *s = opaque;
1865 vga_common_reset(s);
1866 }
1867
1868 #define TEXTMODE_X(x) ((x) % width)
1869 #define TEXTMODE_Y(x) ((x) / width)
1870 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1871 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1872 /* relay text rendering to the display driver
1873 * instead of doing a full vga_update_display() */
1874 static void vga_update_text(void *opaque, console_ch_t *chardata)
1875 {
1876 VGACommonState *s = opaque;
1877 int graphic_mode, i, cursor_offset, cursor_visible;
1878 int cw, cheight, width, height, size, c_min, c_max;
1879 uint32_t *src;
1880 console_ch_t *dst, val;
1881 char msg_buffer[80];
1882 int full_update = 0;
1883
1884 qemu_flush_coalesced_mmio_buffer();
1885
1886 if (!(s->ar_index & 0x20)) {
1887 graphic_mode = GMODE_BLANK;
1888 } else {
1889 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1890 }
1891 if (graphic_mode != s->graphic_mode) {
1892 s->graphic_mode = graphic_mode;
1893 full_update = 1;
1894 }
1895 if (s->last_width == -1) {
1896 s->last_width = 0;
1897 full_update = 1;
1898 }
1899
1900 switch (graphic_mode) {
1901 case GMODE_TEXT:
1902 /* TODO: update palette */
1903 full_update |= update_basic_params(s);
1904
1905 /* total width & height */
1906 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1907 cw = 8;
1908 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1909 cw = 9;
1910 }
1911 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1912 cw = 16; /* NOTE: no 18 pixel wide */
1913 }
1914 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1915 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1916 /* ugly hack for CGA 160x100x16 - explain me the logic */
1917 height = 100;
1918 } else {
1919 height = s->cr[VGA_CRTC_V_DISP_END] |
1920 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1921 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1922 height = (height + 1) / cheight;
1923 }
1924
1925 size = (height * width);
1926 if (size > CH_ATTR_SIZE) {
1927 if (!full_update)
1928 return;
1929
1930 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1931 width, height);
1932 break;
1933 }
1934
1935 if (width != s->last_width || height != s->last_height ||
1936 cw != s->last_cw || cheight != s->last_ch) {
1937 s->last_scr_width = width * cw;
1938 s->last_scr_height = height * cheight;
1939 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1940 dpy_text_resize(s->con, width, height);
1941 s->last_depth = 0;
1942 s->last_width = width;
1943 s->last_height = height;
1944 s->last_ch = cheight;
1945 s->last_cw = cw;
1946 full_update = 1;
1947 }
1948
1949 if (full_update) {
1950 s->full_update_gfx = 1;
1951 }
1952 if (s->full_update_text) {
1953 s->full_update_text = 0;
1954 full_update |= 1;
1955 }
1956
1957 /* Update "hardware" cursor */
1958 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1959 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1960 if (cursor_offset != s->cursor_offset ||
1961 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1962 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1963 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1964 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1965 dpy_text_cursor(s->con,
1966 TEXTMODE_X(cursor_offset),
1967 TEXTMODE_Y(cursor_offset));
1968 else
1969 dpy_text_cursor(s->con, -1, -1);
1970 s->cursor_offset = cursor_offset;
1971 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1972 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1973 }
1974
1975 src = (uint32_t *) s->vram_ptr + s->start_addr;
1976 dst = chardata;
1977
1978 if (full_update) {
1979 for (i = 0; i < size; src ++, dst ++, i ++)
1980 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1981
1982 dpy_text_update(s->con, 0, 0, width, height);
1983 } else {
1984 c_max = 0;
1985
1986 for (i = 0; i < size; src ++, dst ++, i ++) {
1987 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1988 if (*dst != val) {
1989 *dst = val;
1990 c_max = i;
1991 break;
1992 }
1993 }
1994 c_min = i;
1995 for (; i < size; src ++, dst ++, i ++) {
1996 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1997 if (*dst != val) {
1998 *dst = val;
1999 c_max = i;
2000 }
2001 }
2002
2003 if (c_min <= c_max) {
2004 i = TEXTMODE_Y(c_min);
2005 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2006 }
2007 }
2008
2009 return;
2010 case GMODE_GRAPH:
2011 if (!full_update)
2012 return;
2013
2014 s->get_resolution(s, &width, &height);
2015 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2016 width, height);
2017 break;
2018 case GMODE_BLANK:
2019 default:
2020 if (!full_update)
2021 return;
2022
2023 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2024 break;
2025 }
2026
2027 /* Display a message */
2028 s->last_width = 60;
2029 s->last_height = height = 3;
2030 dpy_text_cursor(s->con, -1, -1);
2031 dpy_text_resize(s->con, s->last_width, height);
2032
2033 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2034 console_write_ch(dst ++, ' ');
2035
2036 size = strlen(msg_buffer);
2037 width = (s->last_width - size) / 2;
2038 dst = chardata + s->last_width + width;
2039 for (i = 0; i < size; i ++)
2040 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2041 QEMU_COLOR_BLACK, 1));
2042
2043 dpy_text_update(s->con, 0, 0, s->last_width, height);
2044 }
2045
2046 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2047 unsigned size)
2048 {
2049 VGACommonState *s = opaque;
2050
2051 return vga_mem_readb(s, addr);
2052 }
2053
2054 static void vga_mem_write(void *opaque, hwaddr addr,
2055 uint64_t data, unsigned size)
2056 {
2057 VGACommonState *s = opaque;
2058
2059 vga_mem_writeb(s, addr, data);
2060 }
2061
2062 const MemoryRegionOps vga_mem_ops = {
2063 .read = vga_mem_read,
2064 .write = vga_mem_write,
2065 .endianness = DEVICE_LITTLE_ENDIAN,
2066 .impl = {
2067 .min_access_size = 1,
2068 .max_access_size = 1,
2069 },
2070 };
2071
2072 static int vga_common_post_load(void *opaque, int version_id)
2073 {
2074 VGACommonState *s = opaque;
2075
2076 /* force refresh */
2077 s->graphic_mode = -1;
2078 vbe_update_vgaregs(s);
2079 vga_update_memory_access(s);
2080 return 0;
2081 }
2082
2083 static bool vga_endian_state_needed(void *opaque)
2084 {
2085 VGACommonState *s = opaque;
2086
2087 /*
2088 * Only send the endian state if it's different from the
2089 * default one, thus ensuring backward compatibility for
2090 * migration of the common case
2091 */
2092 return s->default_endian_fb != s->big_endian_fb;
2093 }
2094
2095 static const VMStateDescription vmstate_vga_endian = {
2096 .name = "vga.endian",
2097 .version_id = 1,
2098 .minimum_version_id = 1,
2099 .needed = vga_endian_state_needed,
2100 .fields = (VMStateField[]) {
2101 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2102 VMSTATE_END_OF_LIST()
2103 }
2104 };
2105
2106 const VMStateDescription vmstate_vga_common = {
2107 .name = "vga",
2108 .version_id = 2,
2109 .minimum_version_id = 2,
2110 .post_load = vga_common_post_load,
2111 .fields = (VMStateField[]) {
2112 VMSTATE_UINT32(latch, VGACommonState),
2113 VMSTATE_UINT8(sr_index, VGACommonState),
2114 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2115 VMSTATE_UINT8(gr_index, VGACommonState),
2116 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2117 VMSTATE_UINT8(ar_index, VGACommonState),
2118 VMSTATE_BUFFER(ar, VGACommonState),
2119 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2120 VMSTATE_UINT8(cr_index, VGACommonState),
2121 VMSTATE_BUFFER(cr, VGACommonState),
2122 VMSTATE_UINT8(msr, VGACommonState),
2123 VMSTATE_UINT8(fcr, VGACommonState),
2124 VMSTATE_UINT8(st00, VGACommonState),
2125 VMSTATE_UINT8(st01, VGACommonState),
2126
2127 VMSTATE_UINT8(dac_state, VGACommonState),
2128 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2129 VMSTATE_UINT8(dac_read_index, VGACommonState),
2130 VMSTATE_UINT8(dac_write_index, VGACommonState),
2131 VMSTATE_BUFFER(dac_cache, VGACommonState),
2132 VMSTATE_BUFFER(palette, VGACommonState),
2133
2134 VMSTATE_INT32(bank_offset, VGACommonState),
2135 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2136 VMSTATE_UINT16(vbe_index, VGACommonState),
2137 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2138 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2139 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2140 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2141 VMSTATE_END_OF_LIST()
2142 },
2143 .subsections = (const VMStateDescription*[]) {
2144 &vmstate_vga_endian,
2145 NULL
2146 }
2147 };
2148
2149 static const GraphicHwOps vga_ops = {
2150 .invalidate = vga_invalidate_display,
2151 .gfx_update = vga_update_display,
2152 .text_update = vga_update_text,
2153 };
2154
2155 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2156 {
2157 if (val < vmin) {
2158 return vmin;
2159 }
2160 if (val > vmax) {
2161 return vmax;
2162 }
2163 return val;
2164 }
2165
2166 void vga_common_init(VGACommonState *s, Object *obj)
2167 {
2168 int i, j, v, b;
2169
2170 for(i = 0;i < 256; i++) {
2171 v = 0;
2172 for(j = 0; j < 8; j++) {
2173 v |= ((i >> j) & 1) << (j * 4);
2174 }
2175 expand4[i] = v;
2176
2177 v = 0;
2178 for(j = 0; j < 4; j++) {
2179 v |= ((i >> (2 * j)) & 3) << (j * 4);
2180 }
2181 expand2[i] = v;
2182 }
2183 for(i = 0; i < 16; i++) {
2184 v = 0;
2185 for(j = 0; j < 4; j++) {
2186 b = ((i >> j) & 1);
2187 v |= b << (2 * j);
2188 v |= b << (2 * j + 1);
2189 }
2190 expand4to8[i] = v;
2191 }
2192
2193 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2194 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2195 s->vram_size = s->vram_size_mb * MiB;
2196
2197 if (!s->vbe_size) {
2198 s->vbe_size = s->vram_size;
2199 }
2200 s->vbe_size_mask = s->vbe_size - 1;
2201
2202 s->is_vbe_vmstate = 1;
2203 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2204 &error_fatal);
2205 vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj));
2206 xen_register_framebuffer(&s->vram);
2207 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2208 s->get_bpp = vga_get_bpp;
2209 s->get_offsets = vga_get_offsets;
2210 s->get_resolution = vga_get_resolution;
2211 s->hw_ops = &vga_ops;
2212 switch (vga_retrace_method) {
2213 case VGA_RETRACE_DUMB:
2214 s->retrace = vga_dumb_retrace;
2215 s->update_retrace_info = vga_dumb_update_retrace_info;
2216 break;
2217
2218 case VGA_RETRACE_PRECISE:
2219 s->retrace = vga_precise_retrace;
2220 s->update_retrace_info = vga_precise_update_retrace_info;
2221 break;
2222 }
2223
2224 /*
2225 * Set default fb endian based on target, could probably be turned
2226 * into a device attribute set by the machine/platform to remove
2227 * all target endian dependencies from this file.
2228 */
2229 #ifdef TARGET_WORDS_BIGENDIAN
2230 s->default_endian_fb = true;
2231 #else
2232 s->default_endian_fb = false;
2233 #endif
2234 vga_dirty_log_start(s);
2235 }
2236
2237 static const MemoryRegionPortio vga_portio_list[] = {
2238 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2239 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2240 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2241 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2242 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2243 PORTIO_END_OF_LIST(),
2244 };
2245
2246 static const MemoryRegionPortio vbe_portio_list[] = {
2247 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2248 # ifdef TARGET_I386
2249 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2250 # endif
2251 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2252 PORTIO_END_OF_LIST(),
2253 };
2254
2255 /* Used by both ISA and PCI */
2256 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2257 const MemoryRegionPortio **vga_ports,
2258 const MemoryRegionPortio **vbe_ports)
2259 {
2260 MemoryRegion *vga_mem;
2261
2262 *vga_ports = vga_portio_list;
2263 *vbe_ports = vbe_portio_list;
2264
2265 vga_mem = g_malloc(sizeof(*vga_mem));
2266 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2267 "vga-lowmem", 0x20000);
2268 memory_region_set_flush_coalesced(vga_mem);
2269
2270 return vga_mem;
2271 }
2272
2273 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2274 MemoryRegion *address_space_io, bool init_vga_ports)
2275 {
2276 MemoryRegion *vga_io_memory;
2277 const MemoryRegionPortio *vga_ports, *vbe_ports;
2278
2279 qemu_register_reset(vga_reset, s);
2280
2281 s->bank_offset = 0;
2282
2283 s->legacy_address_space = address_space;
2284
2285 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2286 memory_region_add_subregion_overlap(address_space,
2287 0x000a0000,
2288 vga_io_memory,
2289 1);
2290 memory_region_set_coalescing(vga_io_memory);
2291 if (init_vga_ports) {
2292 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2293 portio_list_set_flush_coalesced(&s->vga_port_list);
2294 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2295 }
2296 if (vbe_ports) {
2297 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2298 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2299 }
2300 }
2301
2302 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2303 {
2304 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2305 * so use an alias to avoid double-mapping the same region.
2306 */
2307 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2308 &s->vram, 0, memory_region_size(&s->vram));
2309 /* XXX: use optimized standard vga accesses */
2310 memory_region_add_subregion(system_memory,
2311 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2312 &s->vram_vbe);
2313 s->vbe_mapped = 1;
2314 }
AR7 emulation for QEMU