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vga: add sr_vbe register set
[qemu.git] / hw / display / vga.c
blob9ebc54f22b52f6b7c14a1a6306676fa7e858d89a
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
38 //#define DEBUG_VGA_MEM
39 //#define DEBUG_VGA_REG
40
41 //#define DEBUG_BOCHS_VBE
42
43 /* 16 state changes per vertical frame @60 Hz */
44 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
45
46 /*
47 * Video Graphics Array (VGA)
48 *
49 * Chipset docs for original IBM VGA:
50 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
51 *
52 * FreeVGA site:
53 * http://www.osdever.net/FreeVGA/home.htm
54 *
55 * Standard VGA features and Bochs VBE extensions are implemented.
56 */
57
58 /* force some bits to zero */
59 const uint8_t sr_mask[8] = {
60 0x03,
61 0x3d,
62 0x0f,
63 0x3f,
64 0x0e,
65 0x00,
66 0x00,
67 0xff,
68 };
69
70 const uint8_t gr_mask[16] = {
71 0x0f, /* 0x00 */
72 0x0f, /* 0x01 */
73 0x0f, /* 0x02 */
74 0x1f, /* 0x03 */
75 0x03, /* 0x04 */
76 0x7b, /* 0x05 */
77 0x0f, /* 0x06 */
78 0x0f, /* 0x07 */
79 0xff, /* 0x08 */
80 0x00, /* 0x09 */
81 0x00, /* 0x0a */
82 0x00, /* 0x0b */
83 0x00, /* 0x0c */
84 0x00, /* 0x0d */
85 0x00, /* 0x0e */
86 0x00, /* 0x0f */
87 };
88
89 #define cbswap_32(__x) \
90 ((uint32_t)( \
91 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
92 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
93 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
94 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
95
96 #ifdef HOST_WORDS_BIGENDIAN
97 #define PAT(x) cbswap_32(x)
98 #else
99 #define PAT(x) (x)
100 #endif
101
102 #ifdef HOST_WORDS_BIGENDIAN
103 #define BIG 1
104 #else
105 #define BIG 0
106 #endif
107
108 #ifdef HOST_WORDS_BIGENDIAN
109 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
110 #else
111 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
112 #endif
113
114 static const uint32_t mask16[16] = {
115 PAT(0x00000000),
116 PAT(0x000000ff),
117 PAT(0x0000ff00),
118 PAT(0x0000ffff),
119 PAT(0x00ff0000),
120 PAT(0x00ff00ff),
121 PAT(0x00ffff00),
122 PAT(0x00ffffff),
123 PAT(0xff000000),
124 PAT(0xff0000ff),
125 PAT(0xff00ff00),
126 PAT(0xff00ffff),
127 PAT(0xffff0000),
128 PAT(0xffff00ff),
129 PAT(0xffffff00),
130 PAT(0xffffffff),
131 };
132
133 #undef PAT
134
135 #ifdef HOST_WORDS_BIGENDIAN
136 #define PAT(x) (x)
137 #else
138 #define PAT(x) cbswap_32(x)
139 #endif
140
141 static uint32_t expand4[256];
142 static uint16_t expand2[256];
143 static uint8_t expand4to8[16];
144
145 static void vbe_update_vgaregs(VGACommonState *s);
146
147 static inline bool vbe_enabled(VGACommonState *s)
148 {
149 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
150 }
151
152 static inline uint8_t sr(VGACommonState *s, int idx)
153 {
154 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
155 }
156
157 static void vga_update_memory_access(VGACommonState *s)
158 {
159 hwaddr base, offset, size;
160
161 if (s->legacy_address_space == NULL) {
162 return;
163 }
164
165 if (s->has_chain4_alias) {
166 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
167 object_unparent(OBJECT(&s->chain4_alias));
168 s->has_chain4_alias = false;
169 s->plane_updated = 0xf;
170 }
171 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
172 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
173 offset = 0;
174 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
175 case 0:
176 base = 0xa0000;
177 size = 0x20000;
178 break;
179 case 1:
180 base = 0xa0000;
181 size = 0x10000;
182 offset = s->bank_offset;
183 break;
184 case 2:
185 base = 0xb0000;
186 size = 0x8000;
187 break;
188 case 3:
189 default:
190 base = 0xb8000;
191 size = 0x8000;
192 break;
193 }
194 assert(offset + size <= s->vram_size);
195 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
196 "vga.chain4", &s->vram, offset, size);
197 memory_region_add_subregion_overlap(s->legacy_address_space, base,
198 &s->chain4_alias, 2);
199 s->has_chain4_alias = true;
200 }
201 }
202
203 static void vga_dumb_update_retrace_info(VGACommonState *s)
204 {
205 (void) s;
206 }
207
208 static void vga_precise_update_retrace_info(VGACommonState *s)
209 {
210 int htotal_chars;
211 int hretr_start_char;
212 int hretr_skew_chars;
213 int hretr_end_char;
214
215 int vtotal_lines;
216 int vretr_start_line;
217 int vretr_end_line;
218
219 int dots;
220 #if 0
221 int div2, sldiv2;
222 #endif
223 int clocking_mode;
224 int clock_sel;
225 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
226 int64_t chars_per_sec;
227 struct vga_precise_retrace *r = &s->retrace_info.precise;
228
229 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
230 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
231 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
232 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
233
234 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
235 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
236 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
237 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
238 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
239 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
240 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
241
242 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
243 clock_sel = (s->msr >> 2) & 3;
244 dots = (s->msr & 1) ? 8 : 9;
245
246 chars_per_sec = clk_hz[clock_sel] / dots;
247
248 htotal_chars <<= clocking_mode;
249
250 r->total_chars = vtotal_lines * htotal_chars;
251 if (r->freq) {
252 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
253 } else {
254 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
255 }
256
257 r->vstart = vretr_start_line;
258 r->vend = r->vstart + vretr_end_line + 1;
259
260 r->hstart = hretr_start_char + hretr_skew_chars;
261 r->hend = r->hstart + hretr_end_char + 1;
262 r->htotal = htotal_chars;
263
264 #if 0
265 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
266 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
267 printf (
268 "hz=%f\n"
269 "htotal = %d\n"
270 "hretr_start = %d\n"
271 "hretr_skew = %d\n"
272 "hretr_end = %d\n"
273 "vtotal = %d\n"
274 "vretr_start = %d\n"
275 "vretr_end = %d\n"
276 "div2 = %d sldiv2 = %d\n"
277 "clocking_mode = %d\n"
278 "clock_sel = %d %d\n"
279 "dots = %d\n"
280 "ticks/char = %" PRId64 "\n"
281 "\n",
282 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
283 htotal_chars,
284 hretr_start_char,
285 hretr_skew_chars,
286 hretr_end_char,
287 vtotal_lines,
288 vretr_start_line,
289 vretr_end_line,
290 div2, sldiv2,
291 clocking_mode,
292 clock_sel,
293 clk_hz[clock_sel],
294 dots,
295 r->ticks_per_char
296 );
297 #endif
298 }
299
300 static uint8_t vga_precise_retrace(VGACommonState *s)
301 {
302 struct vga_precise_retrace *r = &s->retrace_info.precise;
303 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
304
305 if (r->total_chars) {
306 int cur_line, cur_line_char, cur_char;
307 int64_t cur_tick;
308
309 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
310
311 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
312 cur_line = cur_char / r->htotal;
313
314 if (cur_line >= r->vstart && cur_line <= r->vend) {
315 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
316 } else {
317 cur_line_char = cur_char % r->htotal;
318 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
319 val |= ST01_DISP_ENABLE;
320 }
321 }
322
323 return val;
324 } else {
325 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
326 }
327 }
328
329 static uint8_t vga_dumb_retrace(VGACommonState *s)
330 {
331 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
332 }
333
334 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
335 {
336 if (s->msr & VGA_MIS_COLOR) {
337 /* Color */
338 return (addr >= 0x3b0 && addr <= 0x3bf);
339 } else {
340 /* Monochrome */
341 return (addr >= 0x3d0 && addr <= 0x3df);
342 }
343 }
344
345 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
346 {
347 VGACommonState *s = opaque;
348 int val, index;
349
350 if (vga_ioport_invalid(s, addr)) {
351 val = 0xff;
352 } else {
353 switch(addr) {
354 case VGA_ATT_W:
355 if (s->ar_flip_flop == 0) {
356 val = s->ar_index;
357 } else {
358 val = 0;
359 }
360 break;
361 case VGA_ATT_R:
362 index = s->ar_index & 0x1f;
363 if (index < VGA_ATT_C) {
364 val = s->ar[index];
365 } else {
366 val = 0;
367 }
368 break;
369 case VGA_MIS_W:
370 val = s->st00;
371 break;
372 case VGA_SEQ_I:
373 val = s->sr_index;
374 break;
375 case VGA_SEQ_D:
376 val = s->sr[s->sr_index];
377 #ifdef DEBUG_VGA_REG
378 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
379 #endif
380 break;
381 case VGA_PEL_IR:
382 val = s->dac_state;
383 break;
384 case VGA_PEL_IW:
385 val = s->dac_write_index;
386 break;
387 case VGA_PEL_D:
388 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
389 if (++s->dac_sub_index == 3) {
390 s->dac_sub_index = 0;
391 s->dac_read_index++;
392 }
393 break;
394 case VGA_FTC_R:
395 val = s->fcr;
396 break;
397 case VGA_MIS_R:
398 val = s->msr;
399 break;
400 case VGA_GFX_I:
401 val = s->gr_index;
402 break;
403 case VGA_GFX_D:
404 val = s->gr[s->gr_index];
405 #ifdef DEBUG_VGA_REG
406 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
407 #endif
408 break;
409 case VGA_CRT_IM:
410 case VGA_CRT_IC:
411 val = s->cr_index;
412 break;
413 case VGA_CRT_DM:
414 case VGA_CRT_DC:
415 val = s->cr[s->cr_index];
416 #ifdef DEBUG_VGA_REG
417 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
418 #endif
419 break;
420 case VGA_IS1_RM:
421 case VGA_IS1_RC:
422 /* just toggle to fool polling */
423 val = s->st01 = s->retrace(s);
424 s->ar_flip_flop = 0;
425 break;
426 default:
427 val = 0x00;
428 break;
429 }
430 }
431 #if defined(DEBUG_VGA)
432 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
433 #endif
434 return val;
435 }
436
437 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
438 {
439 VGACommonState *s = opaque;
440 int index;
441
442 /* check port range access depending on color/monochrome mode */
443 if (vga_ioport_invalid(s, addr)) {
444 return;
445 }
446 #ifdef DEBUG_VGA
447 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
448 #endif
449
450 switch(addr) {
451 case VGA_ATT_W:
452 if (s->ar_flip_flop == 0) {
453 val &= 0x3f;
454 s->ar_index = val;
455 } else {
456 index = s->ar_index & 0x1f;
457 switch(index) {
458 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
459 s->ar[index] = val & 0x3f;
460 break;
461 case VGA_ATC_MODE:
462 s->ar[index] = val & ~0x10;
463 break;
464 case VGA_ATC_OVERSCAN:
465 s->ar[index] = val;
466 break;
467 case VGA_ATC_PLANE_ENABLE:
468 s->ar[index] = val & ~0xc0;
469 break;
470 case VGA_ATC_PEL:
471 s->ar[index] = val & ~0xf0;
472 break;
473 case VGA_ATC_COLOR_PAGE:
474 s->ar[index] = val & ~0xf0;
475 break;
476 default:
477 break;
478 }
479 }
480 s->ar_flip_flop ^= 1;
481 break;
482 case VGA_MIS_W:
483 s->msr = val & ~0x10;
484 s->update_retrace_info(s);
485 break;
486 case VGA_SEQ_I:
487 s->sr_index = val & 7;
488 break;
489 case VGA_SEQ_D:
490 #ifdef DEBUG_VGA_REG
491 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
492 #endif
493 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
494 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
495 s->update_retrace_info(s);
496 }
497 vga_update_memory_access(s);
498 break;
499 case VGA_PEL_IR:
500 s->dac_read_index = val;
501 s->dac_sub_index = 0;
502 s->dac_state = 3;
503 break;
504 case VGA_PEL_IW:
505 s->dac_write_index = val;
506 s->dac_sub_index = 0;
507 s->dac_state = 0;
508 break;
509 case VGA_PEL_D:
510 s->dac_cache[s->dac_sub_index] = val;
511 if (++s->dac_sub_index == 3) {
512 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
513 s->dac_sub_index = 0;
514 s->dac_write_index++;
515 }
516 break;
517 case VGA_GFX_I:
518 s->gr_index = val & 0x0f;
519 break;
520 case VGA_GFX_D:
521 #ifdef DEBUG_VGA_REG
522 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
523 #endif
524 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
525 vbe_update_vgaregs(s);
526 vga_update_memory_access(s);
527 break;
528 case VGA_CRT_IM:
529 case VGA_CRT_IC:
530 s->cr_index = val;
531 break;
532 case VGA_CRT_DM:
533 case VGA_CRT_DC:
534 #ifdef DEBUG_VGA_REG
535 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
536 #endif
537 /* handle CR0-7 protection */
538 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
539 s->cr_index <= VGA_CRTC_OVERFLOW) {
540 /* can always write bit 4 of CR7 */
541 if (s->cr_index == VGA_CRTC_OVERFLOW) {
542 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
543 (val & 0x10);
544 vbe_update_vgaregs(s);
545 }
546 return;
547 }
548 s->cr[s->cr_index] = val;
549 vbe_update_vgaregs(s);
550
551 switch(s->cr_index) {
552 case VGA_CRTC_H_TOTAL:
553 case VGA_CRTC_H_SYNC_START:
554 case VGA_CRTC_H_SYNC_END:
555 case VGA_CRTC_V_TOTAL:
556 case VGA_CRTC_OVERFLOW:
557 case VGA_CRTC_V_SYNC_END:
558 case VGA_CRTC_MODE:
559 s->update_retrace_info(s);
560 break;
561 }
562 break;
563 case VGA_IS1_RM:
564 case VGA_IS1_RC:
565 s->fcr = val & 0x10;
566 break;
567 }
568 }
569
570 /*
571 * Sanity check vbe register writes.
572 *
573 * As we don't have a way to signal errors to the guest in the bochs
574 * dispi interface we'll go adjust the registers to the closest valid
575 * value.
576 */
577 static void vbe_fixup_regs(VGACommonState *s)
578 {
579 uint16_t *r = s->vbe_regs;
580 uint32_t bits, linelength, maxy, offset;
581
582 if (!vbe_enabled(s)) {
583 /* vbe is turned off -- nothing to do */
584 return;
585 }
586
587 /* check depth */
588 switch (r[VBE_DISPI_INDEX_BPP]) {
589 case 4:
590 case 8:
591 case 16:
592 case 24:
593 case 32:
594 bits = r[VBE_DISPI_INDEX_BPP];
595 break;
596 case 15:
597 bits = 16;
598 break;
599 default:
600 bits = r[VBE_DISPI_INDEX_BPP] = 8;
601 break;
602 }
603
604 /* check width */
605 r[VBE_DISPI_INDEX_XRES] &= ~7u;
606 if (r[VBE_DISPI_INDEX_XRES] == 0) {
607 r[VBE_DISPI_INDEX_XRES] = 8;
608 }
609 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
610 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
611 }
612 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
613 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
614 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
615 }
616 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
617 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
618 }
619
620 /* check height */
621 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
622 maxy = s->vbe_size / linelength;
623 if (r[VBE_DISPI_INDEX_YRES] == 0) {
624 r[VBE_DISPI_INDEX_YRES] = 1;
625 }
626 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
627 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
628 }
629 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
630 r[VBE_DISPI_INDEX_YRES] = maxy;
631 }
632
633 /* check offset */
634 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
635 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
636 }
637 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
638 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
639 }
640 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
641 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
642 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
643 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
644 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
645 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
646 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
647 offset = 0;
648 }
649 }
650
651 /* update vga state */
652 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
653 s->vbe_line_offset = linelength;
654 s->vbe_start_addr = offset / 4;
655 }
656
657 /* we initialize the VGA graphic mode */
658 static void vbe_update_vgaregs(VGACommonState *s)
659 {
660 int h, shift_control;
661
662 if (!vbe_enabled(s)) {
663 /* vbe is turned off -- nothing to do */
664 return;
665 }
666
667 /* graphic mode + memory map 1 */
668 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
669 VGA_GR06_GRAPHICS_MODE;
670 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
671 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
672 /* width */
673 s->cr[VGA_CRTC_H_DISP] =
674 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
675 /* height (only meaningful if < 1024) */
676 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
677 s->cr[VGA_CRTC_V_DISP_END] = h;
678 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
679 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
680 /* line compare to 1023 */
681 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
682 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
683 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
684
685 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
686 shift_control = 0;
687 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
688 } else {
689 shift_control = 2;
690 /* set chain 4 mode */
691 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
692 /* activate all planes */
693 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
694 }
695 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
696 (shift_control << 5);
697 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
698 }
699
700 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
701 {
702 VGACommonState *s = opaque;
703 uint32_t val;
704 val = s->vbe_index;
705 return val;
706 }
707
708 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
709 {
710 VGACommonState *s = opaque;
711 uint32_t val;
712
713 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
714 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
715 switch(s->vbe_index) {
716 /* XXX: do not hardcode ? */
717 case VBE_DISPI_INDEX_XRES:
718 val = VBE_DISPI_MAX_XRES;
719 break;
720 case VBE_DISPI_INDEX_YRES:
721 val = VBE_DISPI_MAX_YRES;
722 break;
723 case VBE_DISPI_INDEX_BPP:
724 val = VBE_DISPI_MAX_BPP;
725 break;
726 default:
727 val = s->vbe_regs[s->vbe_index];
728 break;
729 }
730 } else {
731 val = s->vbe_regs[s->vbe_index];
732 }
733 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
734 val = s->vbe_size / (64 * 1024);
735 } else {
736 val = 0;
737 }
738 #ifdef DEBUG_BOCHS_VBE
739 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
740 #endif
741 return val;
742 }
743
744 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
745 {
746 VGACommonState *s = opaque;
747 s->vbe_index = val;
748 }
749
750 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
751 {
752 VGACommonState *s = opaque;
753
754 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
755 #ifdef DEBUG_BOCHS_VBE
756 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
757 #endif
758 switch(s->vbe_index) {
759 case VBE_DISPI_INDEX_ID:
760 if (val == VBE_DISPI_ID0 ||
761 val == VBE_DISPI_ID1 ||
762 val == VBE_DISPI_ID2 ||
763 val == VBE_DISPI_ID3 ||
764 val == VBE_DISPI_ID4) {
765 s->vbe_regs[s->vbe_index] = val;
766 }
767 break;
768 case VBE_DISPI_INDEX_XRES:
769 case VBE_DISPI_INDEX_YRES:
770 case VBE_DISPI_INDEX_BPP:
771 case VBE_DISPI_INDEX_VIRT_WIDTH:
772 case VBE_DISPI_INDEX_X_OFFSET:
773 case VBE_DISPI_INDEX_Y_OFFSET:
774 s->vbe_regs[s->vbe_index] = val;
775 vbe_fixup_regs(s);
776 vbe_update_vgaregs(s);
777 break;
778 case VBE_DISPI_INDEX_BANK:
779 val &= s->vbe_bank_mask;
780 s->vbe_regs[s->vbe_index] = val;
781 s->bank_offset = (val << 16);
782 vga_update_memory_access(s);
783 break;
784 case VBE_DISPI_INDEX_ENABLE:
785 if ((val & VBE_DISPI_ENABLED) &&
786 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
787
788 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
789 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
790 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
791 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
792 vbe_fixup_regs(s);
793 vbe_update_vgaregs(s);
794
795 /* clear the screen */
796 if (!(val & VBE_DISPI_NOCLEARMEM)) {
797 memset(s->vram_ptr, 0,
798 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
799 }
800 } else {
801 s->bank_offset = 0;
802 }
803 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
804 s->vbe_regs[s->vbe_index] = val;
805 vga_update_memory_access(s);
806 break;
807 default:
808 break;
809 }
810 }
811 }
812
813 /* called for accesses between 0xa0000 and 0xc0000 */
814 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
815 {
816 int memory_map_mode, plane;
817 uint32_t ret;
818
819 /* convert to VGA memory offset */
820 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
821 addr &= 0x1ffff;
822 switch(memory_map_mode) {
823 case 0:
824 break;
825 case 1:
826 if (addr >= 0x10000)
827 return 0xff;
828 addr += s->bank_offset;
829 break;
830 case 2:
831 addr -= 0x10000;
832 if (addr >= 0x8000)
833 return 0xff;
834 break;
835 default:
836 case 3:
837 addr -= 0x18000;
838 if (addr >= 0x8000)
839 return 0xff;
840 break;
841 }
842
843 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
844 /* chain 4 mode : simplest access */
845 assert(addr < s->vram_size);
846 ret = s->vram_ptr[addr];
847 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
848 /* odd/even mode (aka text mode mapping) */
849 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
850 addr = ((addr & ~1) << 1) | plane;
851 if (addr >= s->vram_size) {
852 return 0xff;
853 }
854 ret = s->vram_ptr[addr];
855 } else {
856 /* standard VGA latched access */
857 if (addr * sizeof(uint32_t) >= s->vram_size) {
858 return 0xff;
859 }
860 s->latch = ((uint32_t *)s->vram_ptr)[addr];
861
862 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
863 /* read mode 0 */
864 plane = s->gr[VGA_GFX_PLANE_READ];
865 ret = GET_PLANE(s->latch, plane);
866 } else {
867 /* read mode 1 */
868 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
869 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
870 ret |= ret >> 16;
871 ret |= ret >> 8;
872 ret = (~ret) & 0xff;
873 }
874 }
875 return ret;
876 }
877
878 /* called for accesses between 0xa0000 and 0xc0000 */
879 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
880 {
881 int memory_map_mode, plane, write_mode, b, func_select, mask;
882 uint32_t write_mask, bit_mask, set_mask;
883
884 #ifdef DEBUG_VGA_MEM
885 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
886 #endif
887 /* convert to VGA memory offset */
888 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
889 addr &= 0x1ffff;
890 switch(memory_map_mode) {
891 case 0:
892 break;
893 case 1:
894 if (addr >= 0x10000)
895 return;
896 addr += s->bank_offset;
897 break;
898 case 2:
899 addr -= 0x10000;
900 if (addr >= 0x8000)
901 return;
902 break;
903 default:
904 case 3:
905 addr -= 0x18000;
906 if (addr >= 0x8000)
907 return;
908 break;
909 }
910
911 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
912 /* chain 4 mode : simplest access */
913 plane = addr & 3;
914 mask = (1 << plane);
915 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
916 assert(addr < s->vram_size);
917 s->vram_ptr[addr] = val;
918 #ifdef DEBUG_VGA_MEM
919 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
920 #endif
921 s->plane_updated |= mask; /* only used to detect font change */
922 memory_region_set_dirty(&s->vram, addr, 1);
923 }
924 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
925 /* odd/even mode (aka text mode mapping) */
926 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
927 mask = (1 << plane);
928 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
929 addr = ((addr & ~1) << 1) | plane;
930 if (addr >= s->vram_size) {
931 return;
932 }
933 s->vram_ptr[addr] = val;
934 #ifdef DEBUG_VGA_MEM
935 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
936 #endif
937 s->plane_updated |= mask; /* only used to detect font change */
938 memory_region_set_dirty(&s->vram, addr, 1);
939 }
940 } else {
941 /* standard VGA latched access */
942 write_mode = s->gr[VGA_GFX_MODE] & 3;
943 switch(write_mode) {
944 default:
945 case 0:
946 /* rotate */
947 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
948 val = ((val >> b) | (val << (8 - b))) & 0xff;
949 val |= val << 8;
950 val |= val << 16;
951
952 /* apply set/reset mask */
953 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
954 val = (val & ~set_mask) |
955 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
956 bit_mask = s->gr[VGA_GFX_BIT_MASK];
957 break;
958 case 1:
959 val = s->latch;
960 goto do_write;
961 case 2:
962 val = mask16[val & 0x0f];
963 bit_mask = s->gr[VGA_GFX_BIT_MASK];
964 break;
965 case 3:
966 /* rotate */
967 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
968 val = (val >> b) | (val << (8 - b));
969
970 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
971 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
972 break;
973 }
974
975 /* apply logical operation */
976 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
977 switch(func_select) {
978 case 0:
979 default:
980 /* nothing to do */
981 break;
982 case 1:
983 /* and */
984 val &= s->latch;
985 break;
986 case 2:
987 /* or */
988 val |= s->latch;
989 break;
990 case 3:
991 /* xor */
992 val ^= s->latch;
993 break;
994 }
995
996 /* apply bit mask */
997 bit_mask |= bit_mask << 8;
998 bit_mask |= bit_mask << 16;
999 val = (val & bit_mask) | (s->latch & ~bit_mask);
1000
1001 do_write:
1002 /* mask data according to sr[2] */
1003 mask = sr(s, VGA_SEQ_PLANE_WRITE);
1004 s->plane_updated |= mask; /* only used to detect font change */
1005 write_mask = mask16[mask];
1006 if (addr * sizeof(uint32_t) >= s->vram_size) {
1007 return;
1008 }
1009 ((uint32_t *)s->vram_ptr)[addr] =
1010 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
1011 (val & write_mask);
1012 #ifdef DEBUG_VGA_MEM
1013 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1014 addr * 4, write_mask, val);
1015 #endif
1016 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1017 }
1018 }
1019
1020 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1021 const uint8_t *s, int width);
1022
1023 #include "vga-helpers.h"
1024
1025 /* return true if the palette was modified */
1026 static int update_palette16(VGACommonState *s)
1027 {
1028 int full_update, i;
1029 uint32_t v, col, *palette;
1030
1031 full_update = 0;
1032 palette = s->last_palette;
1033 for(i = 0; i < 16; i++) {
1034 v = s->ar[i];
1035 if (s->ar[VGA_ATC_MODE] & 0x80) {
1036 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1037 } else {
1038 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1039 }
1040 v = v * 3;
1041 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1042 c6_to_8(s->palette[v + 1]),
1043 c6_to_8(s->palette[v + 2]));
1044 if (col != palette[i]) {
1045 full_update = 1;
1046 palette[i] = col;
1047 }
1048 }
1049 return full_update;
1050 }
1051
1052 /* return true if the palette was modified */
1053 static int update_palette256(VGACommonState *s)
1054 {
1055 int full_update, i;
1056 uint32_t v, col, *palette;
1057
1058 full_update = 0;
1059 palette = s->last_palette;
1060 v = 0;
1061 for(i = 0; i < 256; i++) {
1062 if (s->dac_8bit) {
1063 col = rgb_to_pixel32(s->palette[v],
1064 s->palette[v + 1],
1065 s->palette[v + 2]);
1066 } else {
1067 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1068 c6_to_8(s->palette[v + 1]),
1069 c6_to_8(s->palette[v + 2]));
1070 }
1071 if (col != palette[i]) {
1072 full_update = 1;
1073 palette[i] = col;
1074 }
1075 v += 3;
1076 }
1077 return full_update;
1078 }
1079
1080 static void vga_get_offsets(VGACommonState *s,
1081 uint32_t *pline_offset,
1082 uint32_t *pstart_addr,
1083 uint32_t *pline_compare)
1084 {
1085 uint32_t start_addr, line_offset, line_compare;
1086
1087 if (vbe_enabled(s)) {
1088 line_offset = s->vbe_line_offset;
1089 start_addr = s->vbe_start_addr;
1090 line_compare = 65535;
1091 } else {
1092 /* compute line_offset in bytes */
1093 line_offset = s->cr[VGA_CRTC_OFFSET];
1094 line_offset <<= 3;
1095
1096 /* starting address */
1097 start_addr = s->cr[VGA_CRTC_START_LO] |
1098 (s->cr[VGA_CRTC_START_HI] << 8);
1099
1100 /* line compare */
1101 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1102 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1103 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1104 }
1105 *pline_offset = line_offset;
1106 *pstart_addr = start_addr;
1107 *pline_compare = line_compare;
1108 }
1109
1110 /* update start_addr and line_offset. Return TRUE if modified */
1111 static int update_basic_params(VGACommonState *s)
1112 {
1113 int full_update;
1114 uint32_t start_addr, line_offset, line_compare;
1115
1116 full_update = 0;
1117
1118 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1119
1120 if (line_offset != s->line_offset ||
1121 start_addr != s->start_addr ||
1122 line_compare != s->line_compare) {
1123 s->line_offset = line_offset;
1124 s->start_addr = start_addr;
1125 s->line_compare = line_compare;
1126 full_update = 1;
1127 }
1128 return full_update;
1129 }
1130
1131
1132 static const uint8_t cursor_glyph[32 * 4] = {
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 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1142 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1147 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1148 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1149 };
1150
1151 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1152 int *pcwidth, int *pcheight)
1153 {
1154 int width, cwidth, height, cheight;
1155
1156 /* total width & height */
1157 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1158 cwidth = 8;
1159 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1160 cwidth = 9;
1161 }
1162 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1163 cwidth = 16; /* NOTE: no 18 pixel wide */
1164 }
1165 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1166 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1167 /* ugly hack for CGA 160x100x16 - explain me the logic */
1168 height = 100;
1169 } else {
1170 height = s->cr[VGA_CRTC_V_DISP_END] |
1171 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1172 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1173 height = (height + 1) / cheight;
1174 }
1175
1176 *pwidth = width;
1177 *pheight = height;
1178 *pcwidth = cwidth;
1179 *pcheight = cheight;
1180 }
1181
1182 /*
1183 * Text mode update
1184 * Missing:
1185 * - double scan
1186 * - double width
1187 * - underline
1188 * - flashing
1189 */
1190 static void vga_draw_text(VGACommonState *s, int full_update)
1191 {
1192 DisplaySurface *surface = qemu_console_surface(s->con);
1193 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1194 int cx_min, cx_max, linesize, x_incr, line, line1;
1195 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1196 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1197 const uint8_t *font_ptr, *font_base[2];
1198 int dup9, line_offset;
1199 uint32_t *palette;
1200 uint32_t *ch_attr_ptr;
1201 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1202
1203 /* compute font data address (in plane 2) */
1204 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1205 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1206 if (offset != s->font_offsets[0]) {
1207 s->font_offsets[0] = offset;
1208 full_update = 1;
1209 }
1210 font_base[0] = s->vram_ptr + offset;
1211
1212 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1213 font_base[1] = s->vram_ptr + offset;
1214 if (offset != s->font_offsets[1]) {
1215 s->font_offsets[1] = offset;
1216 full_update = 1;
1217 }
1218 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1219 /* if the plane 2 was modified since the last display, it
1220 indicates the font may have been modified */
1221 s->plane_updated = 0;
1222 full_update = 1;
1223 }
1224 full_update |= update_basic_params(s);
1225
1226 line_offset = s->line_offset;
1227
1228 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1229 if ((height * width) <= 1) {
1230 /* better than nothing: exit if transient size is too small */
1231 return;
1232 }
1233 if ((height * width) > CH_ATTR_SIZE) {
1234 /* better than nothing: exit if transient size is too big */
1235 return;
1236 }
1237
1238 if (width != s->last_width || height != s->last_height ||
1239 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1240 s->last_scr_width = width * cw;
1241 s->last_scr_height = height * cheight;
1242 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1243 surface = qemu_console_surface(s->con);
1244 dpy_text_resize(s->con, width, height);
1245 s->last_depth = 0;
1246 s->last_width = width;
1247 s->last_height = height;
1248 s->last_ch = cheight;
1249 s->last_cw = cw;
1250 full_update = 1;
1251 }
1252 full_update |= update_palette16(s);
1253 palette = s->last_palette;
1254 x_incr = cw * surface_bytes_per_pixel(surface);
1255
1256 if (full_update) {
1257 s->full_update_text = 1;
1258 }
1259 if (s->full_update_gfx) {
1260 s->full_update_gfx = 0;
1261 full_update |= 1;
1262 }
1263
1264 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1265 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1266 if (cursor_offset != s->cursor_offset ||
1267 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1268 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1269 /* if the cursor position changed, we update the old and new
1270 chars */
1271 if (s->cursor_offset < CH_ATTR_SIZE)
1272 s->last_ch_attr[s->cursor_offset] = -1;
1273 if (cursor_offset < CH_ATTR_SIZE)
1274 s->last_ch_attr[cursor_offset] = -1;
1275 s->cursor_offset = cursor_offset;
1276 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1277 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1278 }
1279 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1280 if (now >= s->cursor_blink_time) {
1281 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1282 s->cursor_visible_phase = !s->cursor_visible_phase;
1283 }
1284
1285 dest = surface_data(surface);
1286 linesize = surface_stride(surface);
1287 ch_attr_ptr = s->last_ch_attr;
1288 line = 0;
1289 offset = s->start_addr * 4;
1290 for(cy = 0; cy < height; cy++) {
1291 d1 = dest;
1292 src = s->vram_ptr + offset;
1293 cx_min = width;
1294 cx_max = -1;
1295 for(cx = 0; cx < width; cx++) {
1296 ch_attr = *(uint16_t *)src;
1297 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1298 if (cx < cx_min)
1299 cx_min = cx;
1300 if (cx > cx_max)
1301 cx_max = cx;
1302 *ch_attr_ptr = ch_attr;
1303 #ifdef HOST_WORDS_BIGENDIAN
1304 ch = ch_attr >> 8;
1305 cattr = ch_attr & 0xff;
1306 #else
1307 ch = ch_attr & 0xff;
1308 cattr = ch_attr >> 8;
1309 #endif
1310 font_ptr = font_base[(cattr >> 3) & 1];
1311 font_ptr += 32 * 4 * ch;
1312 bgcol = palette[cattr >> 4];
1313 fgcol = palette[cattr & 0x0f];
1314 if (cw == 16) {
1315 vga_draw_glyph16(d1, linesize,
1316 font_ptr, cheight, fgcol, bgcol);
1317 } else if (cw != 9) {
1318 vga_draw_glyph8(d1, linesize,
1319 font_ptr, cheight, fgcol, bgcol);
1320 } else {
1321 dup9 = 0;
1322 if (ch >= 0xb0 && ch <= 0xdf &&
1323 (s->ar[VGA_ATC_MODE] & 0x04)) {
1324 dup9 = 1;
1325 }
1326 vga_draw_glyph9(d1, linesize,
1327 font_ptr, cheight, fgcol, bgcol, dup9);
1328 }
1329 if (src == cursor_ptr &&
1330 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1331 s->cursor_visible_phase) {
1332 int line_start, line_last, h;
1333 /* draw the cursor */
1334 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1335 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1336 /* XXX: check that */
1337 if (line_last > cheight - 1)
1338 line_last = cheight - 1;
1339 if (line_last >= line_start && line_start < cheight) {
1340 h = line_last - line_start + 1;
1341 d = d1 + linesize * line_start;
1342 if (cw == 16) {
1343 vga_draw_glyph16(d, linesize,
1344 cursor_glyph, h, fgcol, bgcol);
1345 } else if (cw != 9) {
1346 vga_draw_glyph8(d, linesize,
1347 cursor_glyph, h, fgcol, bgcol);
1348 } else {
1349 vga_draw_glyph9(d, linesize,
1350 cursor_glyph, h, fgcol, bgcol, 1);
1351 }
1352 }
1353 }
1354 }
1355 d1 += x_incr;
1356 src += 4;
1357 ch_attr_ptr++;
1358 }
1359 if (cx_max != -1) {
1360 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1361 (cx_max - cx_min + 1) * cw, cheight);
1362 }
1363 dest += linesize * cheight;
1364 line1 = line + cheight;
1365 offset += line_offset;
1366 if (line < s->line_compare && line1 >= s->line_compare) {
1367 offset = 0;
1368 }
1369 line = line1;
1370 }
1371 }
1372
1373 enum {
1374 VGA_DRAW_LINE2,
1375 VGA_DRAW_LINE2D2,
1376 VGA_DRAW_LINE4,
1377 VGA_DRAW_LINE4D2,
1378 VGA_DRAW_LINE8D2,
1379 VGA_DRAW_LINE8,
1380 VGA_DRAW_LINE15_LE,
1381 VGA_DRAW_LINE16_LE,
1382 VGA_DRAW_LINE24_LE,
1383 VGA_DRAW_LINE32_LE,
1384 VGA_DRAW_LINE15_BE,
1385 VGA_DRAW_LINE16_BE,
1386 VGA_DRAW_LINE24_BE,
1387 VGA_DRAW_LINE32_BE,
1388 VGA_DRAW_LINE_NB,
1389 };
1390
1391 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1392 vga_draw_line2,
1393 vga_draw_line2d2,
1394 vga_draw_line4,
1395 vga_draw_line4d2,
1396 vga_draw_line8d2,
1397 vga_draw_line8,
1398 vga_draw_line15_le,
1399 vga_draw_line16_le,
1400 vga_draw_line24_le,
1401 vga_draw_line32_le,
1402 vga_draw_line15_be,
1403 vga_draw_line16_be,
1404 vga_draw_line24_be,
1405 vga_draw_line32_be,
1406 };
1407
1408 static int vga_get_bpp(VGACommonState *s)
1409 {
1410 int ret;
1411
1412 if (vbe_enabled(s)) {
1413 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1414 } else {
1415 ret = 0;
1416 }
1417 return ret;
1418 }
1419
1420 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1421 {
1422 int width, height;
1423
1424 if (vbe_enabled(s)) {
1425 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1426 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1427 } else {
1428 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1429 height = s->cr[VGA_CRTC_V_DISP_END] |
1430 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1431 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1432 height = (height + 1);
1433 }
1434 *pwidth = width;
1435 *pheight = height;
1436 }
1437
1438 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1439 {
1440 int y;
1441 if (y1 >= VGA_MAX_HEIGHT)
1442 return;
1443 if (y2 >= VGA_MAX_HEIGHT)
1444 y2 = VGA_MAX_HEIGHT;
1445 for(y = y1; y < y2; y++) {
1446 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1447 }
1448 }
1449
1450 void vga_sync_dirty_bitmap(VGACommonState *s)
1451 {
1452 memory_region_sync_dirty_bitmap(&s->vram);
1453 }
1454
1455 void vga_dirty_log_start(VGACommonState *s)
1456 {
1457 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1458 }
1459
1460 void vga_dirty_log_stop(VGACommonState *s)
1461 {
1462 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1463 }
1464
1465 /*
1466 * graphic modes
1467 */
1468 static void vga_draw_graphic(VGACommonState *s, int full_update)
1469 {
1470 DisplaySurface *surface = qemu_console_surface(s->con);
1471 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1472 int width, height, shift_control, line_offset, bwidth, bits;
1473 ram_addr_t page0, page1, page_min, page_max;
1474 int disp_width, multi_scan, multi_run;
1475 uint8_t *d;
1476 uint32_t v, addr1, addr;
1477 vga_draw_line_func *vga_draw_line = NULL;
1478 bool share_surface;
1479 pixman_format_code_t format;
1480 #ifdef HOST_WORDS_BIGENDIAN
1481 bool byteswap = !s->big_endian_fb;
1482 #else
1483 bool byteswap = s->big_endian_fb;
1484 #endif
1485
1486 full_update |= update_basic_params(s);
1487
1488 if (!full_update)
1489 vga_sync_dirty_bitmap(s);
1490
1491 s->get_resolution(s, &width, &height);
1492 disp_width = width;
1493
1494 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1495 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1496 if (shift_control != 1) {
1497 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1498 - 1;
1499 } else {
1500 /* in CGA modes, multi_scan is ignored */
1501 /* XXX: is it correct ? */
1502 multi_scan = double_scan;
1503 }
1504 multi_run = multi_scan;
1505 if (shift_control != s->shift_control ||
1506 double_scan != s->double_scan) {
1507 full_update = 1;
1508 s->shift_control = shift_control;
1509 s->double_scan = double_scan;
1510 }
1511
1512 if (shift_control == 0) {
1513 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1514 disp_width <<= 1;
1515 }
1516 } else if (shift_control == 1) {
1517 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1518 disp_width <<= 1;
1519 }
1520 }
1521
1522 depth = s->get_bpp(s);
1523
1524 /*
1525 * Check whether we can share the surface with the backend
1526 * or whether we need a shadow surface. We share native
1527 * endian surfaces for 15bpp and above and byteswapped
1528 * surfaces for 24bpp and above.
1529 */
1530 format = qemu_default_pixman_format(depth, !byteswap);
1531 if (format) {
1532 share_surface = dpy_gfx_check_format(s->con, format)
1533 && !s->force_shadow;
1534 } else {
1535 share_surface = false;
1536 }
1537 if (s->line_offset != s->last_line_offset ||
1538 disp_width != s->last_width ||
1539 height != s->last_height ||
1540 s->last_depth != depth ||
1541 s->last_byteswap != byteswap ||
1542 share_surface != is_buffer_shared(surface)) {
1543 if (share_surface) {
1544 surface = qemu_create_displaysurface_from(disp_width,
1545 height, format, s->line_offset,
1546 s->vram_ptr + (s->start_addr * 4));
1547 dpy_gfx_replace_surface(s->con, surface);
1548 #ifdef DEBUG_VGA
1549 printf("VGA: Using shared surface for depth=%d swap=%d\n",
1550 depth, byteswap);
1551 #endif
1552 } else {
1553 qemu_console_resize(s->con, disp_width, height);
1554 surface = qemu_console_surface(s->con);
1555 #ifdef DEBUG_VGA
1556 printf("VGA: Using shadow surface for depth=%d swap=%d\n",
1557 depth, byteswap);
1558 #endif
1559 }
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 } else if (is_buffer_shared(surface) &&
1569 (full_update || surface_data(surface) != s->vram_ptr
1570 + (s->start_addr * 4))) {
1571 pixman_format_code_t format =
1572 qemu_default_pixman_format(depth, !byteswap);
1573 surface = qemu_create_displaysurface_from(disp_width,
1574 height, format, s->line_offset,
1575 s->vram_ptr + (s->start_addr * 4));
1576 dpy_gfx_replace_surface(s->con, surface);
1577 }
1578
1579 if (shift_control == 0) {
1580 full_update |= update_palette16(s);
1581 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1582 v = VGA_DRAW_LINE4D2;
1583 } else {
1584 v = VGA_DRAW_LINE4;
1585 }
1586 bits = 4;
1587 } else if (shift_control == 1) {
1588 full_update |= update_palette16(s);
1589 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1590 v = VGA_DRAW_LINE2D2;
1591 } else {
1592 v = VGA_DRAW_LINE2;
1593 }
1594 bits = 4;
1595 } else {
1596 switch(s->get_bpp(s)) {
1597 default:
1598 case 0:
1599 full_update |= update_palette256(s);
1600 v = VGA_DRAW_LINE8D2;
1601 bits = 4;
1602 break;
1603 case 8:
1604 full_update |= update_palette256(s);
1605 v = VGA_DRAW_LINE8;
1606 bits = 8;
1607 break;
1608 case 15:
1609 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1610 bits = 16;
1611 break;
1612 case 16:
1613 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1614 bits = 16;
1615 break;
1616 case 24:
1617 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1618 bits = 24;
1619 break;
1620 case 32:
1621 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1622 bits = 32;
1623 break;
1624 }
1625 }
1626 vga_draw_line = vga_draw_line_table[v];
1627
1628 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1629 s->cursor_invalidate(s);
1630 }
1631
1632 line_offset = s->line_offset;
1633 #if 0
1634 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",
1635 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1636 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1637 #endif
1638 addr1 = (s->start_addr * 4);
1639 bwidth = (width * bits + 7) / 8;
1640 y_start = -1;
1641 page_min = -1;
1642 page_max = 0;
1643 d = surface_data(surface);
1644 linesize = surface_stride(surface);
1645 y1 = 0;
1646 for(y = 0; y < height; y++) {
1647 addr = addr1;
1648 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1649 int shift;
1650 /* CGA compatibility handling */
1651 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1652 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1653 }
1654 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1655 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1656 }
1657 update = full_update;
1658 page0 = addr;
1659 page1 = addr + bwidth - 1;
1660 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
1661 DIRTY_MEMORY_VGA);
1662 /* explicit invalidation for the hardware cursor */
1663 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1664 if (update) {
1665 if (y_start < 0)
1666 y_start = y;
1667 if (page0 < page_min)
1668 page_min = page0;
1669 if (page1 > page_max)
1670 page_max = page1;
1671 if (!(is_buffer_shared(surface))) {
1672 vga_draw_line(s, d, s->vram_ptr + addr, width);
1673 if (s->cursor_draw_line)
1674 s->cursor_draw_line(s, d, y);
1675 }
1676 } else {
1677 if (y_start >= 0) {
1678 /* flush to display */
1679 dpy_gfx_update(s->con, 0, y_start,
1680 disp_width, y - y_start);
1681 y_start = -1;
1682 }
1683 }
1684 if (!multi_run) {
1685 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1686 if ((y1 & mask) == mask)
1687 addr1 += line_offset;
1688 y1++;
1689 multi_run = multi_scan;
1690 } else {
1691 multi_run--;
1692 }
1693 /* line compare acts on the displayed lines */
1694 if (y == s->line_compare)
1695 addr1 = 0;
1696 d += linesize;
1697 }
1698 if (y_start >= 0) {
1699 /* flush to display */
1700 dpy_gfx_update(s->con, 0, y_start,
1701 disp_width, y - y_start);
1702 }
1703 /* reset modified pages */
1704 if (page_max >= page_min) {
1705 memory_region_reset_dirty(&s->vram,
1706 page_min,
1707 page_max - page_min,
1708 DIRTY_MEMORY_VGA);
1709 }
1710 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1711 }
1712
1713 static void vga_draw_blank(VGACommonState *s, int full_update)
1714 {
1715 DisplaySurface *surface = qemu_console_surface(s->con);
1716 int i, w;
1717 uint8_t *d;
1718
1719 if (!full_update)
1720 return;
1721 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1722 return;
1723
1724 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1725 d = surface_data(surface);
1726 for(i = 0; i < s->last_scr_height; i++) {
1727 memset(d, 0, w);
1728 d += surface_stride(surface);
1729 }
1730 dpy_gfx_update(s->con, 0, 0,
1731 s->last_scr_width, s->last_scr_height);
1732 }
1733
1734 #define GMODE_TEXT 0
1735 #define GMODE_GRAPH 1
1736 #define GMODE_BLANK 2
1737
1738 static void vga_update_display(void *opaque)
1739 {
1740 VGACommonState *s = opaque;
1741 DisplaySurface *surface = qemu_console_surface(s->con);
1742 int full_update, graphic_mode;
1743
1744 qemu_flush_coalesced_mmio_buffer();
1745
1746 if (surface_bits_per_pixel(surface) == 0) {
1747 /* nothing to do */
1748 } else {
1749 full_update = 0;
1750 if (!(s->ar_index & 0x20)) {
1751 graphic_mode = GMODE_BLANK;
1752 } else {
1753 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1754 }
1755 if (graphic_mode != s->graphic_mode) {
1756 s->graphic_mode = graphic_mode;
1757 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1758 full_update = 1;
1759 }
1760 switch(graphic_mode) {
1761 case GMODE_TEXT:
1762 vga_draw_text(s, full_update);
1763 break;
1764 case GMODE_GRAPH:
1765 vga_draw_graphic(s, full_update);
1766 break;
1767 case GMODE_BLANK:
1768 default:
1769 vga_draw_blank(s, full_update);
1770 break;
1771 }
1772 }
1773 }
1774
1775 /* force a full display refresh */
1776 static void vga_invalidate_display(void *opaque)
1777 {
1778 VGACommonState *s = opaque;
1779
1780 s->last_width = -1;
1781 s->last_height = -1;
1782 }
1783
1784 void vga_common_reset(VGACommonState *s)
1785 {
1786 s->sr_index = 0;
1787 memset(s->sr, '\0', sizeof(s->sr));
1788 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1789 s->gr_index = 0;
1790 memset(s->gr, '\0', sizeof(s->gr));
1791 s->ar_index = 0;
1792 memset(s->ar, '\0', sizeof(s->ar));
1793 s->ar_flip_flop = 0;
1794 s->cr_index = 0;
1795 memset(s->cr, '\0', sizeof(s->cr));
1796 s->msr = 0;
1797 s->fcr = 0;
1798 s->st00 = 0;
1799 s->st01 = 0;
1800 s->dac_state = 0;
1801 s->dac_sub_index = 0;
1802 s->dac_read_index = 0;
1803 s->dac_write_index = 0;
1804 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1805 s->dac_8bit = 0;
1806 memset(s->palette, '\0', sizeof(s->palette));
1807 s->bank_offset = 0;
1808 s->vbe_index = 0;
1809 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1810 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1811 s->vbe_start_addr = 0;
1812 s->vbe_line_offset = 0;
1813 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1814 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1815 s->graphic_mode = -1; /* force full update */
1816 s->shift_control = 0;
1817 s->double_scan = 0;
1818 s->line_offset = 0;
1819 s->line_compare = 0;
1820 s->start_addr = 0;
1821 s->plane_updated = 0;
1822 s->last_cw = 0;
1823 s->last_ch = 0;
1824 s->last_width = 0;
1825 s->last_height = 0;
1826 s->last_scr_width = 0;
1827 s->last_scr_height = 0;
1828 s->cursor_start = 0;
1829 s->cursor_end = 0;
1830 s->cursor_offset = 0;
1831 s->big_endian_fb = s->default_endian_fb;
1832 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1833 memset(s->last_palette, '\0', sizeof(s->last_palette));
1834 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1835 switch (vga_retrace_method) {
1836 case VGA_RETRACE_DUMB:
1837 break;
1838 case VGA_RETRACE_PRECISE:
1839 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1840 break;
1841 }
1842 vga_update_memory_access(s);
1843 }
1844
1845 static void vga_reset(void *opaque)
1846 {
1847 VGACommonState *s = opaque;
1848 vga_common_reset(s);
1849 }
1850
1851 #define TEXTMODE_X(x) ((x) % width)
1852 #define TEXTMODE_Y(x) ((x) / width)
1853 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1854 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1855 /* relay text rendering to the display driver
1856 * instead of doing a full vga_update_display() */
1857 static void vga_update_text(void *opaque, console_ch_t *chardata)
1858 {
1859 VGACommonState *s = opaque;
1860 int graphic_mode, i, cursor_offset, cursor_visible;
1861 int cw, cheight, width, height, size, c_min, c_max;
1862 uint32_t *src;
1863 console_ch_t *dst, val;
1864 char msg_buffer[80];
1865 int full_update = 0;
1866
1867 qemu_flush_coalesced_mmio_buffer();
1868
1869 if (!(s->ar_index & 0x20)) {
1870 graphic_mode = GMODE_BLANK;
1871 } else {
1872 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1873 }
1874 if (graphic_mode != s->graphic_mode) {
1875 s->graphic_mode = graphic_mode;
1876 full_update = 1;
1877 }
1878 if (s->last_width == -1) {
1879 s->last_width = 0;
1880 full_update = 1;
1881 }
1882
1883 switch (graphic_mode) {
1884 case GMODE_TEXT:
1885 /* TODO: update palette */
1886 full_update |= update_basic_params(s);
1887
1888 /* total width & height */
1889 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1890 cw = 8;
1891 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1892 cw = 9;
1893 }
1894 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1895 cw = 16; /* NOTE: no 18 pixel wide */
1896 }
1897 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1898 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1899 /* ugly hack for CGA 160x100x16 - explain me the logic */
1900 height = 100;
1901 } else {
1902 height = s->cr[VGA_CRTC_V_DISP_END] |
1903 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1904 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1905 height = (height + 1) / cheight;
1906 }
1907
1908 size = (height * width);
1909 if (size > CH_ATTR_SIZE) {
1910 if (!full_update)
1911 return;
1912
1913 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1914 width, height);
1915 break;
1916 }
1917
1918 if (width != s->last_width || height != s->last_height ||
1919 cw != s->last_cw || cheight != s->last_ch) {
1920 s->last_scr_width = width * cw;
1921 s->last_scr_height = height * cheight;
1922 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1923 dpy_text_resize(s->con, width, height);
1924 s->last_depth = 0;
1925 s->last_width = width;
1926 s->last_height = height;
1927 s->last_ch = cheight;
1928 s->last_cw = cw;
1929 full_update = 1;
1930 }
1931
1932 if (full_update) {
1933 s->full_update_gfx = 1;
1934 }
1935 if (s->full_update_text) {
1936 s->full_update_text = 0;
1937 full_update |= 1;
1938 }
1939
1940 /* Update "hardware" cursor */
1941 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1942 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1943 if (cursor_offset != s->cursor_offset ||
1944 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1945 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1946 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1947 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1948 dpy_text_cursor(s->con,
1949 TEXTMODE_X(cursor_offset),
1950 TEXTMODE_Y(cursor_offset));
1951 else
1952 dpy_text_cursor(s->con, -1, -1);
1953 s->cursor_offset = cursor_offset;
1954 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1955 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1956 }
1957
1958 src = (uint32_t *) s->vram_ptr + s->start_addr;
1959 dst = chardata;
1960
1961 if (full_update) {
1962 for (i = 0; i < size; src ++, dst ++, i ++)
1963 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1964
1965 dpy_text_update(s->con, 0, 0, width, height);
1966 } else {
1967 c_max = 0;
1968
1969 for (i = 0; i < size; src ++, dst ++, i ++) {
1970 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1971 if (*dst != val) {
1972 *dst = val;
1973 c_max = i;
1974 break;
1975 }
1976 }
1977 c_min = i;
1978 for (; i < size; src ++, dst ++, i ++) {
1979 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1980 if (*dst != val) {
1981 *dst = val;
1982 c_max = i;
1983 }
1984 }
1985
1986 if (c_min <= c_max) {
1987 i = TEXTMODE_Y(c_min);
1988 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
1989 }
1990 }
1991
1992 return;
1993 case GMODE_GRAPH:
1994 if (!full_update)
1995 return;
1996
1997 s->get_resolution(s, &width, &height);
1998 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
1999 width, height);
2000 break;
2001 case GMODE_BLANK:
2002 default:
2003 if (!full_update)
2004 return;
2005
2006 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2007 break;
2008 }
2009
2010 /* Display a message */
2011 s->last_width = 60;
2012 s->last_height = height = 3;
2013 dpy_text_cursor(s->con, -1, -1);
2014 dpy_text_resize(s->con, s->last_width, height);
2015
2016 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2017 console_write_ch(dst ++, ' ');
2018
2019 size = strlen(msg_buffer);
2020 width = (s->last_width - size) / 2;
2021 dst = chardata + s->last_width + width;
2022 for (i = 0; i < size; i ++)
2023 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2024 QEMU_COLOR_BLACK, 1));
2025
2026 dpy_text_update(s->con, 0, 0, s->last_width, height);
2027 }
2028
2029 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2030 unsigned size)
2031 {
2032 VGACommonState *s = opaque;
2033
2034 return vga_mem_readb(s, addr);
2035 }
2036
2037 static void vga_mem_write(void *opaque, hwaddr addr,
2038 uint64_t data, unsigned size)
2039 {
2040 VGACommonState *s = opaque;
2041
2042 vga_mem_writeb(s, addr, data);
2043 }
2044
2045 const MemoryRegionOps vga_mem_ops = {
2046 .read = vga_mem_read,
2047 .write = vga_mem_write,
2048 .endianness = DEVICE_LITTLE_ENDIAN,
2049 .impl = {
2050 .min_access_size = 1,
2051 .max_access_size = 1,
2052 },
2053 };
2054
2055 static int vga_common_post_load(void *opaque, int version_id)
2056 {
2057 VGACommonState *s = opaque;
2058
2059 /* force refresh */
2060 s->graphic_mode = -1;
2061 vbe_update_vgaregs(s);
2062 return 0;
2063 }
2064
2065 static bool vga_endian_state_needed(void *opaque)
2066 {
2067 VGACommonState *s = opaque;
2068
2069 /*
2070 * Only send the endian state if it's different from the
2071 * default one, thus ensuring backward compatibility for
2072 * migration of the common case
2073 */
2074 return s->default_endian_fb != s->big_endian_fb;
2075 }
2076
2077 static const VMStateDescription vmstate_vga_endian = {
2078 .name = "vga.endian",
2079 .version_id = 1,
2080 .minimum_version_id = 1,
2081 .needed = vga_endian_state_needed,
2082 .fields = (VMStateField[]) {
2083 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2084 VMSTATE_END_OF_LIST()
2085 }
2086 };
2087
2088 const VMStateDescription vmstate_vga_common = {
2089 .name = "vga",
2090 .version_id = 2,
2091 .minimum_version_id = 2,
2092 .post_load = vga_common_post_load,
2093 .fields = (VMStateField[]) {
2094 VMSTATE_UINT32(latch, VGACommonState),
2095 VMSTATE_UINT8(sr_index, VGACommonState),
2096 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2097 VMSTATE_UINT8(gr_index, VGACommonState),
2098 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2099 VMSTATE_UINT8(ar_index, VGACommonState),
2100 VMSTATE_BUFFER(ar, VGACommonState),
2101 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2102 VMSTATE_UINT8(cr_index, VGACommonState),
2103 VMSTATE_BUFFER(cr, VGACommonState),
2104 VMSTATE_UINT8(msr, VGACommonState),
2105 VMSTATE_UINT8(fcr, VGACommonState),
2106 VMSTATE_UINT8(st00, VGACommonState),
2107 VMSTATE_UINT8(st01, VGACommonState),
2108
2109 VMSTATE_UINT8(dac_state, VGACommonState),
2110 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2111 VMSTATE_UINT8(dac_read_index, VGACommonState),
2112 VMSTATE_UINT8(dac_write_index, VGACommonState),
2113 VMSTATE_BUFFER(dac_cache, VGACommonState),
2114 VMSTATE_BUFFER(palette, VGACommonState),
2115
2116 VMSTATE_INT32(bank_offset, VGACommonState),
2117 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2118 VMSTATE_UINT16(vbe_index, VGACommonState),
2119 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2120 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2121 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2122 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2123 VMSTATE_END_OF_LIST()
2124 },
2125 .subsections = (const VMStateDescription*[]) {
2126 &vmstate_vga_endian,
2127 NULL
2128 }
2129 };
2130
2131 static const GraphicHwOps vga_ops = {
2132 .invalidate = vga_invalidate_display,
2133 .gfx_update = vga_update_display,
2134 .text_update = vga_update_text,
2135 };
2136
2137 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2138 {
2139 if (val < vmin) {
2140 return vmin;
2141 }
2142 if (val > vmax) {
2143 return vmax;
2144 }
2145 return val;
2146 }
2147
2148 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2149 {
2150 int i, j, v, b;
2151
2152 for(i = 0;i < 256; i++) {
2153 v = 0;
2154 for(j = 0; j < 8; j++) {
2155 v |= ((i >> j) & 1) << (j * 4);
2156 }
2157 expand4[i] = v;
2158
2159 v = 0;
2160 for(j = 0; j < 4; j++) {
2161 v |= ((i >> (2 * j)) & 3) << (j * 4);
2162 }
2163 expand2[i] = v;
2164 }
2165 for(i = 0; i < 16; i++) {
2166 v = 0;
2167 for(j = 0; j < 4; j++) {
2168 b = ((i >> j) & 1);
2169 v |= b << (2 * j);
2170 v |= b << (2 * j + 1);
2171 }
2172 expand4to8[i] = v;
2173 }
2174
2175 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2176 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2177 s->vram_size = s->vram_size_mb << 20;
2178
2179 if (!s->vbe_size) {
2180 s->vbe_size = s->vram_size;
2181 }
2182
2183 s->is_vbe_vmstate = 1;
2184 memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size,
2185 &error_fatal);
2186 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2187 xen_register_framebuffer(&s->vram);
2188 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2189 s->get_bpp = vga_get_bpp;
2190 s->get_offsets = vga_get_offsets;
2191 s->get_resolution = vga_get_resolution;
2192 s->hw_ops = &vga_ops;
2193 switch (vga_retrace_method) {
2194 case VGA_RETRACE_DUMB:
2195 s->retrace = vga_dumb_retrace;
2196 s->update_retrace_info = vga_dumb_update_retrace_info;
2197 break;
2198
2199 case VGA_RETRACE_PRECISE:
2200 s->retrace = vga_precise_retrace;
2201 s->update_retrace_info = vga_precise_update_retrace_info;
2202 break;
2203 }
2204
2205 /*
2206 * Set default fb endian based on target, could probably be turned
2207 * into a device attribute set by the machine/platform to remove
2208 * all target endian dependencies from this file.
2209 */
2210 #ifdef TARGET_WORDS_BIGENDIAN
2211 s->default_endian_fb = true;
2212 #else
2213 s->default_endian_fb = false;
2214 #endif
2215 vga_dirty_log_start(s);
2216 }
2217
2218 static const MemoryRegionPortio vga_portio_list[] = {
2219 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2220 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2221 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2222 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2223 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2224 PORTIO_END_OF_LIST(),
2225 };
2226
2227 static const MemoryRegionPortio vbe_portio_list[] = {
2228 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2229 # ifdef TARGET_I386
2230 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2231 # endif
2232 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2233 PORTIO_END_OF_LIST(),
2234 };
2235
2236 /* Used by both ISA and PCI */
2237 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2238 const MemoryRegionPortio **vga_ports,
2239 const MemoryRegionPortio **vbe_ports)
2240 {
2241 MemoryRegion *vga_mem;
2242
2243 *vga_ports = vga_portio_list;
2244 *vbe_ports = vbe_portio_list;
2245
2246 vga_mem = g_malloc(sizeof(*vga_mem));
2247 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2248 "vga-lowmem", 0x20000);
2249 memory_region_set_flush_coalesced(vga_mem);
2250
2251 return vga_mem;
2252 }
2253
2254 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2255 MemoryRegion *address_space_io, bool init_vga_ports)
2256 {
2257 MemoryRegion *vga_io_memory;
2258 const MemoryRegionPortio *vga_ports, *vbe_ports;
2259
2260 qemu_register_reset(vga_reset, s);
2261
2262 s->bank_offset = 0;
2263
2264 s->legacy_address_space = address_space;
2265
2266 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2267 memory_region_add_subregion_overlap(address_space,
2268 0x000a0000,
2269 vga_io_memory,
2270 1);
2271 memory_region_set_coalescing(vga_io_memory);
2272 if (init_vga_ports) {
2273 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2274 portio_list_set_flush_coalesced(&s->vga_port_list);
2275 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2276 }
2277 if (vbe_ports) {
2278 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2279 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2280 }
2281 }
2282
2283 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2284 {
2285 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2286 * so use an alias to avoid double-mapping the same region.
2287 */
2288 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2289 &s->vram, 0, memory_region_size(&s->vram));
2290 /* XXX: use optimized standard vga accesses */
2291 memory_region_add_subregion(system_memory,
2292 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2293 &s->vram_vbe);
2294 s->vbe_mapped = 1;
2295 }
QEmu