vga: handle cirrus vbe mode wraparounds.
[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 "vga.h"
28 #include "ui/console.h"
29 #include "hw/i386/pc.h"
30 #include "hw/pci/pci.h"
31 #include "vga_int.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 * 1024);
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 ch_attr = *(uint16_t *)src;
1284 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1285 if (cx < cx_min)
1286 cx_min = cx;
1287 if (cx > cx_max)
1288 cx_max = cx;
1289 *ch_attr_ptr = ch_attr;
1290 #ifdef HOST_WORDS_BIGENDIAN
1291 ch = ch_attr >> 8;
1292 cattr = ch_attr & 0xff;
1293 #else
1294 ch = ch_attr & 0xff;
1295 cattr = ch_attr >> 8;
1296 #endif
1297 font_ptr = font_base[(cattr >> 3) & 1];
1298 font_ptr += 32 * 4 * ch;
1299 bgcol = palette[cattr >> 4];
1300 fgcol = palette[cattr & 0x0f];
1301 if (cw == 16) {
1302 vga_draw_glyph16(d1, linesize,
1303 font_ptr, cheight, fgcol, bgcol);
1304 } else if (cw != 9) {
1305 vga_draw_glyph8(d1, linesize,
1306 font_ptr, cheight, fgcol, bgcol);
1307 } else {
1308 dup9 = 0;
1309 if (ch >= 0xb0 && ch <= 0xdf &&
1310 (s->ar[VGA_ATC_MODE] & 0x04)) {
1311 dup9 = 1;
1312 }
1313 vga_draw_glyph9(d1, linesize,
1314 font_ptr, cheight, fgcol, bgcol, dup9);
1315 }
1316 if (src == cursor_ptr &&
1317 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1318 s->cursor_visible_phase) {
1319 int line_start, line_last, h;
1320 /* draw the cursor */
1321 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1322 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1323 /* XXX: check that */
1324 if (line_last > cheight - 1)
1325 line_last = cheight - 1;
1326 if (line_last >= line_start && line_start < cheight) {
1327 h = line_last - line_start + 1;
1328 d = d1 + linesize * line_start;
1329 if (cw == 16) {
1330 vga_draw_glyph16(d, linesize,
1331 cursor_glyph, h, fgcol, bgcol);
1332 } else if (cw != 9) {
1333 vga_draw_glyph8(d, linesize,
1334 cursor_glyph, h, fgcol, bgcol);
1335 } else {
1336 vga_draw_glyph9(d, linesize,
1337 cursor_glyph, h, fgcol, bgcol, 1);
1338 }
1339 }
1340 }
1341 }
1342 d1 += x_incr;
1343 src += 4;
1344 ch_attr_ptr++;
1345 }
1346 if (cx_max != -1) {
1347 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1348 (cx_max - cx_min + 1) * cw, cheight);
1349 }
1350 dest += linesize * cheight;
1351 line1 = line + cheight;
1352 offset += line_offset;
1353 if (line < s->line_compare && line1 >= s->line_compare) {
1354 offset = 0;
1355 }
1356 line = line1;
1357 }
1358 }
1359
1360 enum {
1361 VGA_DRAW_LINE2,
1362 VGA_DRAW_LINE2D2,
1363 VGA_DRAW_LINE4,
1364 VGA_DRAW_LINE4D2,
1365 VGA_DRAW_LINE8D2,
1366 VGA_DRAW_LINE8,
1367 VGA_DRAW_LINE15_LE,
1368 VGA_DRAW_LINE16_LE,
1369 VGA_DRAW_LINE24_LE,
1370 VGA_DRAW_LINE32_LE,
1371 VGA_DRAW_LINE15_BE,
1372 VGA_DRAW_LINE16_BE,
1373 VGA_DRAW_LINE24_BE,
1374 VGA_DRAW_LINE32_BE,
1375 VGA_DRAW_LINE_NB,
1376 };
1377
1378 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1379 vga_draw_line2,
1380 vga_draw_line2d2,
1381 vga_draw_line4,
1382 vga_draw_line4d2,
1383 vga_draw_line8d2,
1384 vga_draw_line8,
1385 vga_draw_line15_le,
1386 vga_draw_line16_le,
1387 vga_draw_line24_le,
1388 vga_draw_line32_le,
1389 vga_draw_line15_be,
1390 vga_draw_line16_be,
1391 vga_draw_line24_be,
1392 vga_draw_line32_be,
1393 };
1394
1395 static int vga_get_bpp(VGACommonState *s)
1396 {
1397 int ret;
1398
1399 if (vbe_enabled(s)) {
1400 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1401 } else {
1402 ret = 0;
1403 }
1404 return ret;
1405 }
1406
1407 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1408 {
1409 int width, height;
1410
1411 if (vbe_enabled(s)) {
1412 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1413 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1414 } else {
1415 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1416 height = s->cr[VGA_CRTC_V_DISP_END] |
1417 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1418 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1419 height = (height + 1);
1420 }
1421 *pwidth = width;
1422 *pheight = height;
1423 }
1424
1425 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1426 {
1427 int y;
1428 if (y1 >= VGA_MAX_HEIGHT)
1429 return;
1430 if (y2 >= VGA_MAX_HEIGHT)
1431 y2 = VGA_MAX_HEIGHT;
1432 for(y = y1; y < y2; y++) {
1433 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1434 }
1435 }
1436
1437 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1438 {
1439 if (y >= VGA_MAX_HEIGHT) {
1440 return false;
1441 }
1442 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1443 }
1444
1445 void vga_sync_dirty_bitmap(VGACommonState *s)
1446 {
1447 memory_region_sync_dirty_bitmap(&s->vram);
1448 }
1449
1450 void vga_dirty_log_start(VGACommonState *s)
1451 {
1452 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1453 }
1454
1455 void vga_dirty_log_stop(VGACommonState *s)
1456 {
1457 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1458 }
1459
1460 /*
1461 * graphic modes
1462 */
1463 static void vga_draw_graphic(VGACommonState *s, int full_update)
1464 {
1465 DisplaySurface *surface = qemu_console_surface(s->con);
1466 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1467 int width, height, shift_control, bwidth, bits;
1468 ram_addr_t page0, page1, region_start, region_end;
1469 DirtyBitmapSnapshot *snap = NULL;
1470 int disp_width, multi_scan, multi_run;
1471 uint8_t *d;
1472 uint32_t v, addr1, addr;
1473 vga_draw_line_func *vga_draw_line = NULL;
1474 bool share_surface, force_shadow = false;
1475 pixman_format_code_t format;
1476 #ifdef HOST_WORDS_BIGENDIAN
1477 bool byteswap = !s->big_endian_fb;
1478 #else
1479 bool byteswap = s->big_endian_fb;
1480 #endif
1481
1482 full_update |= update_basic_params(s);
1483
1484 s->get_resolution(s, &width, &height);
1485 disp_width = width;
1486
1487 region_start = (s->start_addr * 4);
1488 region_end = region_start + s->line_offset * height;
1489 if (region_end > s->vbe_size) {
1490 /* wraps around (can happen with cirrus vbe modes) */
1491 region_start = 0;
1492 region_end = s->vbe_size;
1493 force_shadow = true;
1494 }
1495
1496 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1497 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1498 if (shift_control != 1) {
1499 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1500 - 1;
1501 } else {
1502 /* in CGA modes, multi_scan is ignored */
1503 /* XXX: is it correct ? */
1504 multi_scan = double_scan;
1505 }
1506 multi_run = multi_scan;
1507 if (shift_control != s->shift_control ||
1508 double_scan != s->double_scan) {
1509 full_update = 1;
1510 s->shift_control = shift_control;
1511 s->double_scan = double_scan;
1512 }
1513
1514 if (shift_control == 0) {
1515 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1516 disp_width <<= 1;
1517 }
1518 } else if (shift_control == 1) {
1519 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1520 disp_width <<= 1;
1521 }
1522 }
1523
1524 depth = s->get_bpp(s);
1525
1526 /*
1527 * Check whether we can share the surface with the backend
1528 * or whether we need a shadow surface. We share native
1529 * endian surfaces for 15bpp and above and byteswapped
1530 * surfaces for 24bpp and above.
1531 */
1532 format = qemu_default_pixman_format(depth, !byteswap);
1533 if (format) {
1534 share_surface = dpy_gfx_check_format(s->con, format)
1535 && !s->force_shadow && !force_shadow;
1536 } else {
1537 share_surface = false;
1538 }
1539 if (s->line_offset != s->last_line_offset ||
1540 disp_width != s->last_width ||
1541 height != s->last_height ||
1542 s->last_depth != depth ||
1543 s->last_byteswap != byteswap ||
1544 share_surface != is_buffer_shared(surface)) {
1545 if (share_surface) {
1546 surface = qemu_create_displaysurface_from(disp_width,
1547 height, format, s->line_offset,
1548 s->vram_ptr + (s->start_addr * 4));
1549 dpy_gfx_replace_surface(s->con, surface);
1550 } else {
1551 qemu_console_resize(s->con, disp_width, height);
1552 surface = qemu_console_surface(s->con);
1553 }
1554 s->last_scr_width = disp_width;
1555 s->last_scr_height = height;
1556 s->last_width = disp_width;
1557 s->last_height = height;
1558 s->last_line_offset = s->line_offset;
1559 s->last_depth = depth;
1560 s->last_byteswap = byteswap;
1561 full_update = 1;
1562 } else if (is_buffer_shared(surface) &&
1563 (full_update || surface_data(surface) != s->vram_ptr
1564 + (s->start_addr * 4))) {
1565 pixman_format_code_t format =
1566 qemu_default_pixman_format(depth, !byteswap);
1567 surface = qemu_create_displaysurface_from(disp_width,
1568 height, format, s->line_offset,
1569 s->vram_ptr + (s->start_addr * 4));
1570 dpy_gfx_replace_surface(s->con, surface);
1571 }
1572
1573 if (shift_control == 0) {
1574 full_update |= update_palette16(s);
1575 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1576 v = VGA_DRAW_LINE4D2;
1577 } else {
1578 v = VGA_DRAW_LINE4;
1579 }
1580 bits = 4;
1581 } else if (shift_control == 1) {
1582 full_update |= update_palette16(s);
1583 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1584 v = VGA_DRAW_LINE2D2;
1585 } else {
1586 v = VGA_DRAW_LINE2;
1587 }
1588 bits = 4;
1589 } else {
1590 switch(s->get_bpp(s)) {
1591 default:
1592 case 0:
1593 full_update |= update_palette256(s);
1594 v = VGA_DRAW_LINE8D2;
1595 bits = 4;
1596 break;
1597 case 8:
1598 full_update |= update_palette256(s);
1599 v = VGA_DRAW_LINE8;
1600 bits = 8;
1601 break;
1602 case 15:
1603 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1604 bits = 16;
1605 break;
1606 case 16:
1607 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1608 bits = 16;
1609 break;
1610 case 24:
1611 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1612 bits = 24;
1613 break;
1614 case 32:
1615 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1616 bits = 32;
1617 break;
1618 }
1619 }
1620 vga_draw_line = vga_draw_line_table[v];
1621
1622 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1623 s->cursor_invalidate(s);
1624 }
1625
1626 #if 0
1627 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",
1628 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1629 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1630 #endif
1631 addr1 = (s->start_addr * 4);
1632 bwidth = DIV_ROUND_UP(width * bits, 8);
1633 y_start = -1;
1634 d = surface_data(surface);
1635 linesize = surface_stride(surface);
1636 y1 = 0;
1637
1638 if (!full_update) {
1639 vga_sync_dirty_bitmap(s);
1640 if (s->line_compare < height) {
1641 /* split screen mode */
1642 region_start = 0;
1643 }
1644 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1645 region_end - region_start,
1646 DIRTY_MEMORY_VGA);
1647 }
1648
1649 for(y = 0; y < height; y++) {
1650 addr = addr1;
1651 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1652 int shift;
1653 /* CGA compatibility handling */
1654 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1655 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1656 }
1657 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1658 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1659 }
1660 update = full_update;
1661 page0 = addr & s->vbe_size_mask;
1662 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1663 if (full_update) {
1664 update = 1;
1665 } else if (page1 < page0) {
1666 /* scanline wraps from end of video memory to the start */
1667 assert(force_shadow);
1668 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1669 page0, 0);
1670 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1671 page1, 0);
1672 } else {
1673 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1674 page0, page1 - page0);
1675 }
1676 /* explicit invalidation for the hardware cursor (cirrus only) */
1677 update |= vga_scanline_invalidated(s, y);
1678 if (update) {
1679 if (y_start < 0)
1680 y_start = y;
1681 if (!(is_buffer_shared(surface))) {
1682 vga_draw_line(s, d, addr, width);
1683 if (s->cursor_draw_line)
1684 s->cursor_draw_line(s, d, y);
1685 }
1686 } else {
1687 if (y_start >= 0) {
1688 /* flush to display */
1689 dpy_gfx_update(s->con, 0, y_start,
1690 disp_width, y - y_start);
1691 y_start = -1;
1692 }
1693 }
1694 if (!multi_run) {
1695 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1696 if ((y1 & mask) == mask)
1697 addr1 += s->line_offset;
1698 y1++;
1699 multi_run = multi_scan;
1700 } else {
1701 multi_run--;
1702 }
1703 /* line compare acts on the displayed lines */
1704 if (y == s->line_compare)
1705 addr1 = 0;
1706 d += linesize;
1707 }
1708 if (y_start >= 0) {
1709 /* flush to display */
1710 dpy_gfx_update(s->con, 0, y_start,
1711 disp_width, y - y_start);
1712 }
1713 g_free(snap);
1714 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1715 }
1716
1717 static void vga_draw_blank(VGACommonState *s, int full_update)
1718 {
1719 DisplaySurface *surface = qemu_console_surface(s->con);
1720 int i, w;
1721 uint8_t *d;
1722
1723 if (!full_update)
1724 return;
1725 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1726 return;
1727
1728 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1729 d = surface_data(surface);
1730 for(i = 0; i < s->last_scr_height; i++) {
1731 memset(d, 0, w);
1732 d += surface_stride(surface);
1733 }
1734 dpy_gfx_update(s->con, 0, 0,
1735 s->last_scr_width, s->last_scr_height);
1736 }
1737
1738 #define GMODE_TEXT 0
1739 #define GMODE_GRAPH 1
1740 #define GMODE_BLANK 2
1741
1742 static void vga_update_display(void *opaque)
1743 {
1744 VGACommonState *s = opaque;
1745 DisplaySurface *surface = qemu_console_surface(s->con);
1746 int full_update, graphic_mode;
1747
1748 qemu_flush_coalesced_mmio_buffer();
1749
1750 if (surface_bits_per_pixel(surface) == 0) {
1751 /* nothing to do */
1752 } else {
1753 full_update = 0;
1754 if (!(s->ar_index & 0x20)) {
1755 graphic_mode = GMODE_BLANK;
1756 } else {
1757 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1758 }
1759 if (graphic_mode != s->graphic_mode) {
1760 s->graphic_mode = graphic_mode;
1761 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1762 full_update = 1;
1763 }
1764 switch(graphic_mode) {
1765 case GMODE_TEXT:
1766 vga_draw_text(s, full_update);
1767 break;
1768 case GMODE_GRAPH:
1769 vga_draw_graphic(s, full_update);
1770 break;
1771 case GMODE_BLANK:
1772 default:
1773 vga_draw_blank(s, full_update);
1774 break;
1775 }
1776 }
1777 }
1778
1779 /* force a full display refresh */
1780 static void vga_invalidate_display(void *opaque)
1781 {
1782 VGACommonState *s = opaque;
1783
1784 s->last_width = -1;
1785 s->last_height = -1;
1786 }
1787
1788 void vga_common_reset(VGACommonState *s)
1789 {
1790 s->sr_index = 0;
1791 memset(s->sr, '\0', sizeof(s->sr));
1792 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1793 s->gr_index = 0;
1794 memset(s->gr, '\0', sizeof(s->gr));
1795 s->ar_index = 0;
1796 memset(s->ar, '\0', sizeof(s->ar));
1797 s->ar_flip_flop = 0;
1798 s->cr_index = 0;
1799 memset(s->cr, '\0', sizeof(s->cr));
1800 s->msr = 0;
1801 s->fcr = 0;
1802 s->st00 = 0;
1803 s->st01 = 0;
1804 s->dac_state = 0;
1805 s->dac_sub_index = 0;
1806 s->dac_read_index = 0;
1807 s->dac_write_index = 0;
1808 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1809 s->dac_8bit = 0;
1810 memset(s->palette, '\0', sizeof(s->palette));
1811 s->bank_offset = 0;
1812 s->vbe_index = 0;
1813 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1814 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1815 s->vbe_start_addr = 0;
1816 s->vbe_line_offset = 0;
1817 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1818 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1819 s->graphic_mode = -1; /* force full update */
1820 s->shift_control = 0;
1821 s->double_scan = 0;
1822 s->line_offset = 0;
1823 s->line_compare = 0;
1824 s->start_addr = 0;
1825 s->plane_updated = 0;
1826 s->last_cw = 0;
1827 s->last_ch = 0;
1828 s->last_width = 0;
1829 s->last_height = 0;
1830 s->last_scr_width = 0;
1831 s->last_scr_height = 0;
1832 s->cursor_start = 0;
1833 s->cursor_end = 0;
1834 s->cursor_offset = 0;
1835 s->big_endian_fb = s->default_endian_fb;
1836 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1837 memset(s->last_palette, '\0', sizeof(s->last_palette));
1838 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1839 switch (vga_retrace_method) {
1840 case VGA_RETRACE_DUMB:
1841 break;
1842 case VGA_RETRACE_PRECISE:
1843 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1844 break;
1845 }
1846 vga_update_memory_access(s);
1847 }
1848
1849 static void vga_reset(void *opaque)
1850 {
1851 VGACommonState *s = opaque;
1852 vga_common_reset(s);
1853 }
1854
1855 #define TEXTMODE_X(x) ((x) % width)
1856 #define TEXTMODE_Y(x) ((x) / width)
1857 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1858 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1859 /* relay text rendering to the display driver
1860 * instead of doing a full vga_update_display() */
1861 static void vga_update_text(void *opaque, console_ch_t *chardata)
1862 {
1863 VGACommonState *s = opaque;
1864 int graphic_mode, i, cursor_offset, cursor_visible;
1865 int cw, cheight, width, height, size, c_min, c_max;
1866 uint32_t *src;
1867 console_ch_t *dst, val;
1868 char msg_buffer[80];
1869 int full_update = 0;
1870
1871 qemu_flush_coalesced_mmio_buffer();
1872
1873 if (!(s->ar_index & 0x20)) {
1874 graphic_mode = GMODE_BLANK;
1875 } else {
1876 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1877 }
1878 if (graphic_mode != s->graphic_mode) {
1879 s->graphic_mode = graphic_mode;
1880 full_update = 1;
1881 }
1882 if (s->last_width == -1) {
1883 s->last_width = 0;
1884 full_update = 1;
1885 }
1886
1887 switch (graphic_mode) {
1888 case GMODE_TEXT:
1889 /* TODO: update palette */
1890 full_update |= update_basic_params(s);
1891
1892 /* total width & height */
1893 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1894 cw = 8;
1895 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1896 cw = 9;
1897 }
1898 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1899 cw = 16; /* NOTE: no 18 pixel wide */
1900 }
1901 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1902 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1903 /* ugly hack for CGA 160x100x16 - explain me the logic */
1904 height = 100;
1905 } else {
1906 height = s->cr[VGA_CRTC_V_DISP_END] |
1907 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1908 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1909 height = (height + 1) / cheight;
1910 }
1911
1912 size = (height * width);
1913 if (size > CH_ATTR_SIZE) {
1914 if (!full_update)
1915 return;
1916
1917 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1918 width, height);
1919 break;
1920 }
1921
1922 if (width != s->last_width || height != s->last_height ||
1923 cw != s->last_cw || cheight != s->last_ch) {
1924 s->last_scr_width = width * cw;
1925 s->last_scr_height = height * cheight;
1926 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1927 dpy_text_resize(s->con, width, height);
1928 s->last_depth = 0;
1929 s->last_width = width;
1930 s->last_height = height;
1931 s->last_ch = cheight;
1932 s->last_cw = cw;
1933 full_update = 1;
1934 }
1935
1936 if (full_update) {
1937 s->full_update_gfx = 1;
1938 }
1939 if (s->full_update_text) {
1940 s->full_update_text = 0;
1941 full_update |= 1;
1942 }
1943
1944 /* Update "hardware" cursor */
1945 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1946 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1947 if (cursor_offset != s->cursor_offset ||
1948 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1949 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1950 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1951 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1952 dpy_text_cursor(s->con,
1953 TEXTMODE_X(cursor_offset),
1954 TEXTMODE_Y(cursor_offset));
1955 else
1956 dpy_text_cursor(s->con, -1, -1);
1957 s->cursor_offset = cursor_offset;
1958 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1959 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1960 }
1961
1962 src = (uint32_t *) s->vram_ptr + s->start_addr;
1963 dst = chardata;
1964
1965 if (full_update) {
1966 for (i = 0; i < size; src ++, dst ++, i ++)
1967 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1968
1969 dpy_text_update(s->con, 0, 0, width, height);
1970 } else {
1971 c_max = 0;
1972
1973 for (i = 0; i < size; src ++, dst ++, i ++) {
1974 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1975 if (*dst != val) {
1976 *dst = val;
1977 c_max = i;
1978 break;
1979 }
1980 }
1981 c_min = i;
1982 for (; i < size; src ++, dst ++, i ++) {
1983 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1984 if (*dst != val) {
1985 *dst = val;
1986 c_max = i;
1987 }
1988 }
1989
1990 if (c_min <= c_max) {
1991 i = TEXTMODE_Y(c_min);
1992 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
1993 }
1994 }
1995
1996 return;
1997 case GMODE_GRAPH:
1998 if (!full_update)
1999 return;
2000
2001 s->get_resolution(s, &width, &height);
2002 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2003 width, height);
2004 break;
2005 case GMODE_BLANK:
2006 default:
2007 if (!full_update)
2008 return;
2009
2010 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2011 break;
2012 }
2013
2014 /* Display a message */
2015 s->last_width = 60;
2016 s->last_height = height = 3;
2017 dpy_text_cursor(s->con, -1, -1);
2018 dpy_text_resize(s->con, s->last_width, height);
2019
2020 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2021 console_write_ch(dst ++, ' ');
2022
2023 size = strlen(msg_buffer);
2024 width = (s->last_width - size) / 2;
2025 dst = chardata + s->last_width + width;
2026 for (i = 0; i < size; i ++)
2027 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2028 QEMU_COLOR_BLACK, 1));
2029
2030 dpy_text_update(s->con, 0, 0, s->last_width, height);
2031 }
2032
2033 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2034 unsigned size)
2035 {
2036 VGACommonState *s = opaque;
2037
2038 return vga_mem_readb(s, addr);
2039 }
2040
2041 static void vga_mem_write(void *opaque, hwaddr addr,
2042 uint64_t data, unsigned size)
2043 {
2044 VGACommonState *s = opaque;
2045
2046 vga_mem_writeb(s, addr, data);
2047 }
2048
2049 const MemoryRegionOps vga_mem_ops = {
2050 .read = vga_mem_read,
2051 .write = vga_mem_write,
2052 .endianness = DEVICE_LITTLE_ENDIAN,
2053 .impl = {
2054 .min_access_size = 1,
2055 .max_access_size = 1,
2056 },
2057 };
2058
2059 static int vga_common_post_load(void *opaque, int version_id)
2060 {
2061 VGACommonState *s = opaque;
2062
2063 /* force refresh */
2064 s->graphic_mode = -1;
2065 vbe_update_vgaregs(s);
2066 vga_update_memory_access(s);
2067 return 0;
2068 }
2069
2070 static bool vga_endian_state_needed(void *opaque)
2071 {
2072 VGACommonState *s = opaque;
2073
2074 /*
2075 * Only send the endian state if it's different from the
2076 * default one, thus ensuring backward compatibility for
2077 * migration of the common case
2078 */
2079 return s->default_endian_fb != s->big_endian_fb;
2080 }
2081
2082 static const VMStateDescription vmstate_vga_endian = {
2083 .name = "vga.endian",
2084 .version_id = 1,
2085 .minimum_version_id = 1,
2086 .needed = vga_endian_state_needed,
2087 .fields = (VMStateField[]) {
2088 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2089 VMSTATE_END_OF_LIST()
2090 }
2091 };
2092
2093 const VMStateDescription vmstate_vga_common = {
2094 .name = "vga",
2095 .version_id = 2,
2096 .minimum_version_id = 2,
2097 .post_load = vga_common_post_load,
2098 .fields = (VMStateField[]) {
2099 VMSTATE_UINT32(latch, VGACommonState),
2100 VMSTATE_UINT8(sr_index, VGACommonState),
2101 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2102 VMSTATE_UINT8(gr_index, VGACommonState),
2103 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2104 VMSTATE_UINT8(ar_index, VGACommonState),
2105 VMSTATE_BUFFER(ar, VGACommonState),
2106 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2107 VMSTATE_UINT8(cr_index, VGACommonState),
2108 VMSTATE_BUFFER(cr, VGACommonState),
2109 VMSTATE_UINT8(msr, VGACommonState),
2110 VMSTATE_UINT8(fcr, VGACommonState),
2111 VMSTATE_UINT8(st00, VGACommonState),
2112 VMSTATE_UINT8(st01, VGACommonState),
2113
2114 VMSTATE_UINT8(dac_state, VGACommonState),
2115 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2116 VMSTATE_UINT8(dac_read_index, VGACommonState),
2117 VMSTATE_UINT8(dac_write_index, VGACommonState),
2118 VMSTATE_BUFFER(dac_cache, VGACommonState),
2119 VMSTATE_BUFFER(palette, VGACommonState),
2120
2121 VMSTATE_INT32(bank_offset, VGACommonState),
2122 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2123 VMSTATE_UINT16(vbe_index, VGACommonState),
2124 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2125 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2126 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2127 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2128 VMSTATE_END_OF_LIST()
2129 },
2130 .subsections = (const VMStateDescription*[]) {
2131 &vmstate_vga_endian,
2132 NULL
2133 }
2134 };
2135
2136 static const GraphicHwOps vga_ops = {
2137 .invalidate = vga_invalidate_display,
2138 .gfx_update = vga_update_display,
2139 .text_update = vga_update_text,
2140 };
2141
2142 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2143 {
2144 if (val < vmin) {
2145 return vmin;
2146 }
2147 if (val > vmax) {
2148 return vmax;
2149 }
2150 return val;
2151 }
2152
2153 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2154 {
2155 int i, j, v, b;
2156
2157 for(i = 0;i < 256; i++) {
2158 v = 0;
2159 for(j = 0; j < 8; j++) {
2160 v |= ((i >> j) & 1) << (j * 4);
2161 }
2162 expand4[i] = v;
2163
2164 v = 0;
2165 for(j = 0; j < 4; j++) {
2166 v |= ((i >> (2 * j)) & 3) << (j * 4);
2167 }
2168 expand2[i] = v;
2169 }
2170 for(i = 0; i < 16; i++) {
2171 v = 0;
2172 for(j = 0; j < 4; j++) {
2173 b = ((i >> j) & 1);
2174 v |= b << (2 * j);
2175 v |= b << (2 * j + 1);
2176 }
2177 expand4to8[i] = v;
2178 }
2179
2180 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2181 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2182 s->vram_size = s->vram_size_mb << 20;
2183
2184 if (!s->vbe_size) {
2185 s->vbe_size = s->vram_size;
2186 }
2187 s->vbe_size_mask = s->vbe_size - 1;
2188
2189 s->is_vbe_vmstate = 1;
2190 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2191 &error_fatal);
2192 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2193 xen_register_framebuffer(&s->vram);
2194 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2195 s->get_bpp = vga_get_bpp;
2196 s->get_offsets = vga_get_offsets;
2197 s->get_resolution = vga_get_resolution;
2198 s->hw_ops = &vga_ops;
2199 switch (vga_retrace_method) {
2200 case VGA_RETRACE_DUMB:
2201 s->retrace = vga_dumb_retrace;
2202 s->update_retrace_info = vga_dumb_update_retrace_info;
2203 break;
2204
2205 case VGA_RETRACE_PRECISE:
2206 s->retrace = vga_precise_retrace;
2207 s->update_retrace_info = vga_precise_update_retrace_info;
2208 break;
2209 }
2210
2211 /*
2212 * Set default fb endian based on target, could probably be turned
2213 * into a device attribute set by the machine/platform to remove
2214 * all target endian dependencies from this file.
2215 */
2216 #ifdef TARGET_WORDS_BIGENDIAN
2217 s->default_endian_fb = true;
2218 #else
2219 s->default_endian_fb = false;
2220 #endif
2221 vga_dirty_log_start(s);
2222 }
2223
2224 static const MemoryRegionPortio vga_portio_list[] = {
2225 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2226 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2227 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2228 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2229 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2230 PORTIO_END_OF_LIST(),
2231 };
2232
2233 static const MemoryRegionPortio vbe_portio_list[] = {
2234 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2235 # ifdef TARGET_I386
2236 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2237 # endif
2238 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2239 PORTIO_END_OF_LIST(),
2240 };
2241
2242 /* Used by both ISA and PCI */
2243 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2244 const MemoryRegionPortio **vga_ports,
2245 const MemoryRegionPortio **vbe_ports)
2246 {
2247 MemoryRegion *vga_mem;
2248
2249 *vga_ports = vga_portio_list;
2250 *vbe_ports = vbe_portio_list;
2251
2252 vga_mem = g_malloc(sizeof(*vga_mem));
2253 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2254 "vga-lowmem", 0x20000);
2255 memory_region_set_flush_coalesced(vga_mem);
2256
2257 return vga_mem;
2258 }
2259
2260 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2261 MemoryRegion *address_space_io, bool init_vga_ports)
2262 {
2263 MemoryRegion *vga_io_memory;
2264 const MemoryRegionPortio *vga_ports, *vbe_ports;
2265
2266 qemu_register_reset(vga_reset, s);
2267
2268 s->bank_offset = 0;
2269
2270 s->legacy_address_space = address_space;
2271
2272 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2273 memory_region_add_subregion_overlap(address_space,
2274 0x000a0000,
2275 vga_io_memory,
2276 1);
2277 memory_region_set_coalescing(vga_io_memory);
2278 if (init_vga_ports) {
2279 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2280 portio_list_set_flush_coalesced(&s->vga_port_list);
2281 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2282 }
2283 if (vbe_ports) {
2284 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2285 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2286 }
2287 }
2288
2289 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2290 {
2291 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2292 * so use an alias to avoid double-mapping the same region.
2293 */
2294 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2295 &s->vram, 0, memory_region_size(&s->vram));
2296 /* XXX: use optimized standard vga accesses */
2297 memory_region_add_subregion(system_memory,
2298 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2299 &s->vram_vbe);
2300 s->vbe_mapped = 1;
2301 }