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vga: cleanup surface handling
[mirror_qemu.git] / hw / display / vga.c
1 /*
2 * QEMU VGA Emulator.
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "hw/hw.h"
27 #include "hw/display/vga.h"
28 #include "hw/pci/pci.h"
29 #include "vga_int.h"
30 #include "vga_regs.h"
31 #include "ui/pixel_ops.h"
32 #include "qemu/timer.h"
33 #include "hw/xen/xen.h"
34 #include "trace.h"
35
36 //#define DEBUG_VGA_MEM
37 //#define DEBUG_VGA_REG
38
39 /* 16 state changes per vertical frame @60 Hz */
40 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
41
42 /*
43 * Video Graphics Array (VGA)
44 *
45 * Chipset docs for original IBM VGA:
46 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
47 *
48 * FreeVGA site:
49 * http://www.osdever.net/FreeVGA/home.htm
50 *
51 * Standard VGA features and Bochs VBE extensions are implemented.
52 */
53
54 /* force some bits to zero */
55 const uint8_t sr_mask[8] = {
56 0x03,
57 0x3d,
58 0x0f,
59 0x3f,
60 0x0e,
61 0x00,
62 0x00,
63 0xff,
64 };
65
66 const uint8_t gr_mask[16] = {
67 0x0f, /* 0x00 */
68 0x0f, /* 0x01 */
69 0x0f, /* 0x02 */
70 0x1f, /* 0x03 */
71 0x03, /* 0x04 */
72 0x7b, /* 0x05 */
73 0x0f, /* 0x06 */
74 0x0f, /* 0x07 */
75 0xff, /* 0x08 */
76 0x00, /* 0x09 */
77 0x00, /* 0x0a */
78 0x00, /* 0x0b */
79 0x00, /* 0x0c */
80 0x00, /* 0x0d */
81 0x00, /* 0x0e */
82 0x00, /* 0x0f */
83 };
84
85 #define cbswap_32(__x) \
86 ((uint32_t)( \
87 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
88 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
89 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
90 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
91
92 #ifdef HOST_WORDS_BIGENDIAN
93 #define PAT(x) cbswap_32(x)
94 #else
95 #define PAT(x) (x)
96 #endif
97
98 #ifdef HOST_WORDS_BIGENDIAN
99 #define BIG 1
100 #else
101 #define BIG 0
102 #endif
103
104 #ifdef HOST_WORDS_BIGENDIAN
105 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
106 #else
107 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
108 #endif
109
110 static const uint32_t mask16[16] = {
111 PAT(0x00000000),
112 PAT(0x000000ff),
113 PAT(0x0000ff00),
114 PAT(0x0000ffff),
115 PAT(0x00ff0000),
116 PAT(0x00ff00ff),
117 PAT(0x00ffff00),
118 PAT(0x00ffffff),
119 PAT(0xff000000),
120 PAT(0xff0000ff),
121 PAT(0xff00ff00),
122 PAT(0xff00ffff),
123 PAT(0xffff0000),
124 PAT(0xffff00ff),
125 PAT(0xffffff00),
126 PAT(0xffffffff),
127 };
128
129 #undef PAT
130
131 #ifdef HOST_WORDS_BIGENDIAN
132 #define PAT(x) (x)
133 #else
134 #define PAT(x) cbswap_32(x)
135 #endif
136
137 static uint32_t expand4[256];
138 static uint16_t expand2[256];
139 static uint8_t expand4to8[16];
140
141 static void vbe_update_vgaregs(VGACommonState *s);
142
143 static inline bool vbe_enabled(VGACommonState *s)
144 {
145 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
146 }
147
148 static inline uint8_t sr(VGACommonState *s, int idx)
149 {
150 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
151 }
152
153 static void vga_update_memory_access(VGACommonState *s)
154 {
155 hwaddr base, offset, size;
156
157 if (s->legacy_address_space == NULL) {
158 return;
159 }
160
161 if (s->has_chain4_alias) {
162 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
163 object_unparent(OBJECT(&s->chain4_alias));
164 s->has_chain4_alias = false;
165 s->plane_updated = 0xf;
166 }
167 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
168 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
169 offset = 0;
170 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
171 case 0:
172 base = 0xa0000;
173 size = 0x20000;
174 break;
175 case 1:
176 base = 0xa0000;
177 size = 0x10000;
178 offset = s->bank_offset;
179 break;
180 case 2:
181 base = 0xb0000;
182 size = 0x8000;
183 break;
184 case 3:
185 default:
186 base = 0xb8000;
187 size = 0x8000;
188 break;
189 }
190 assert(offset + size <= s->vram_size);
191 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
192 "vga.chain4", &s->vram, offset, size);
193 memory_region_add_subregion_overlap(s->legacy_address_space, base,
194 &s->chain4_alias, 2);
195 s->has_chain4_alias = true;
196 }
197 }
198
199 static void vga_dumb_update_retrace_info(VGACommonState *s)
200 {
201 (void) s;
202 }
203
204 static void vga_precise_update_retrace_info(VGACommonState *s)
205 {
206 int htotal_chars;
207 int hretr_start_char;
208 int hretr_skew_chars;
209 int hretr_end_char;
210
211 int vtotal_lines;
212 int vretr_start_line;
213 int vretr_end_line;
214
215 int dots;
216 #if 0
217 int div2, sldiv2;
218 #endif
219 int clocking_mode;
220 int clock_sel;
221 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
222 int64_t chars_per_sec;
223 struct vga_precise_retrace *r = &s->retrace_info.precise;
224
225 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
226 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
227 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
228 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
229
230 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
231 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
232 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
233 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
234 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
235 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
236 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
237
238 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
239 clock_sel = (s->msr >> 2) & 3;
240 dots = (s->msr & 1) ? 8 : 9;
241
242 chars_per_sec = clk_hz[clock_sel] / dots;
243
244 htotal_chars <<= clocking_mode;
245
246 r->total_chars = vtotal_lines * htotal_chars;
247 if (r->freq) {
248 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
249 } else {
250 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
251 }
252
253 r->vstart = vretr_start_line;
254 r->vend = r->vstart + vretr_end_line + 1;
255
256 r->hstart = hretr_start_char + hretr_skew_chars;
257 r->hend = r->hstart + hretr_end_char + 1;
258 r->htotal = htotal_chars;
259
260 #if 0
261 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
262 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
263 printf (
264 "hz=%f\n"
265 "htotal = %d\n"
266 "hretr_start = %d\n"
267 "hretr_skew = %d\n"
268 "hretr_end = %d\n"
269 "vtotal = %d\n"
270 "vretr_start = %d\n"
271 "vretr_end = %d\n"
272 "div2 = %d sldiv2 = %d\n"
273 "clocking_mode = %d\n"
274 "clock_sel = %d %d\n"
275 "dots = %d\n"
276 "ticks/char = %" PRId64 "\n"
277 "\n",
278 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
279 htotal_chars,
280 hretr_start_char,
281 hretr_skew_chars,
282 hretr_end_char,
283 vtotal_lines,
284 vretr_start_line,
285 vretr_end_line,
286 div2, sldiv2,
287 clocking_mode,
288 clock_sel,
289 clk_hz[clock_sel],
290 dots,
291 r->ticks_per_char
292 );
293 #endif
294 }
295
296 static uint8_t vga_precise_retrace(VGACommonState *s)
297 {
298 struct vga_precise_retrace *r = &s->retrace_info.precise;
299 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
300
301 if (r->total_chars) {
302 int cur_line, cur_line_char, cur_char;
303 int64_t cur_tick;
304
305 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
306
307 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
308 cur_line = cur_char / r->htotal;
309
310 if (cur_line >= r->vstart && cur_line <= r->vend) {
311 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
312 } else {
313 cur_line_char = cur_char % r->htotal;
314 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
315 val |= ST01_DISP_ENABLE;
316 }
317 }
318
319 return val;
320 } else {
321 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
322 }
323 }
324
325 static uint8_t vga_dumb_retrace(VGACommonState *s)
326 {
327 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
328 }
329
330 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
331 {
332 if (s->msr & VGA_MIS_COLOR) {
333 /* Color */
334 return (addr >= 0x3b0 && addr <= 0x3bf);
335 } else {
336 /* Monochrome */
337 return (addr >= 0x3d0 && addr <= 0x3df);
338 }
339 }
340
341 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
342 {
343 VGACommonState *s = opaque;
344 int val, index;
345
346 if (vga_ioport_invalid(s, addr)) {
347 val = 0xff;
348 } else {
349 switch(addr) {
350 case VGA_ATT_W:
351 if (s->ar_flip_flop == 0) {
352 val = s->ar_index;
353 } else {
354 val = 0;
355 }
356 break;
357 case VGA_ATT_R:
358 index = s->ar_index & 0x1f;
359 if (index < VGA_ATT_C) {
360 val = s->ar[index];
361 } else {
362 val = 0;
363 }
364 break;
365 case VGA_MIS_W:
366 val = s->st00;
367 break;
368 case VGA_SEQ_I:
369 val = s->sr_index;
370 break;
371 case VGA_SEQ_D:
372 val = s->sr[s->sr_index];
373 #ifdef DEBUG_VGA_REG
374 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
375 #endif
376 break;
377 case VGA_PEL_IR:
378 val = s->dac_state;
379 break;
380 case VGA_PEL_IW:
381 val = s->dac_write_index;
382 break;
383 case VGA_PEL_D:
384 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
385 if (++s->dac_sub_index == 3) {
386 s->dac_sub_index = 0;
387 s->dac_read_index++;
388 }
389 break;
390 case VGA_FTC_R:
391 val = s->fcr;
392 break;
393 case VGA_MIS_R:
394 val = s->msr;
395 break;
396 case VGA_GFX_I:
397 val = s->gr_index;
398 break;
399 case VGA_GFX_D:
400 val = s->gr[s->gr_index];
401 #ifdef DEBUG_VGA_REG
402 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
403 #endif
404 break;
405 case VGA_CRT_IM:
406 case VGA_CRT_IC:
407 val = s->cr_index;
408 break;
409 case VGA_CRT_DM:
410 case VGA_CRT_DC:
411 val = s->cr[s->cr_index];
412 #ifdef DEBUG_VGA_REG
413 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
414 #endif
415 break;
416 case VGA_IS1_RM:
417 case VGA_IS1_RC:
418 /* just toggle to fool polling */
419 val = s->st01 = s->retrace(s);
420 s->ar_flip_flop = 0;
421 break;
422 default:
423 val = 0x00;
424 break;
425 }
426 }
427 trace_vga_std_read_io(addr, val);
428 return val;
429 }
430
431 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
432 {
433 VGACommonState *s = opaque;
434 int index;
435
436 /* check port range access depending on color/monochrome mode */
437 if (vga_ioport_invalid(s, addr)) {
438 return;
439 }
440 trace_vga_std_write_io(addr, val);
441
442 switch(addr) {
443 case VGA_ATT_W:
444 if (s->ar_flip_flop == 0) {
445 val &= 0x3f;
446 s->ar_index = val;
447 } else {
448 index = s->ar_index & 0x1f;
449 switch(index) {
450 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
451 s->ar[index] = val & 0x3f;
452 break;
453 case VGA_ATC_MODE:
454 s->ar[index] = val & ~0x10;
455 break;
456 case VGA_ATC_OVERSCAN:
457 s->ar[index] = val;
458 break;
459 case VGA_ATC_PLANE_ENABLE:
460 s->ar[index] = val & ~0xc0;
461 break;
462 case VGA_ATC_PEL:
463 s->ar[index] = val & ~0xf0;
464 break;
465 case VGA_ATC_COLOR_PAGE:
466 s->ar[index] = val & ~0xf0;
467 break;
468 default:
469 break;
470 }
471 }
472 s->ar_flip_flop ^= 1;
473 break;
474 case VGA_MIS_W:
475 s->msr = val & ~0x10;
476 s->update_retrace_info(s);
477 break;
478 case VGA_SEQ_I:
479 s->sr_index = val & 7;
480 break;
481 case VGA_SEQ_D:
482 #ifdef DEBUG_VGA_REG
483 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
484 #endif
485 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
486 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
487 s->update_retrace_info(s);
488 }
489 vga_update_memory_access(s);
490 break;
491 case VGA_PEL_IR:
492 s->dac_read_index = val;
493 s->dac_sub_index = 0;
494 s->dac_state = 3;
495 break;
496 case VGA_PEL_IW:
497 s->dac_write_index = val;
498 s->dac_sub_index = 0;
499 s->dac_state = 0;
500 break;
501 case VGA_PEL_D:
502 s->dac_cache[s->dac_sub_index] = val;
503 if (++s->dac_sub_index == 3) {
504 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
505 s->dac_sub_index = 0;
506 s->dac_write_index++;
507 }
508 break;
509 case VGA_GFX_I:
510 s->gr_index = val & 0x0f;
511 break;
512 case VGA_GFX_D:
513 #ifdef DEBUG_VGA_REG
514 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
515 #endif
516 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
517 vbe_update_vgaregs(s);
518 vga_update_memory_access(s);
519 break;
520 case VGA_CRT_IM:
521 case VGA_CRT_IC:
522 s->cr_index = val;
523 break;
524 case VGA_CRT_DM:
525 case VGA_CRT_DC:
526 #ifdef DEBUG_VGA_REG
527 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
528 #endif
529 /* handle CR0-7 protection */
530 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
531 s->cr_index <= VGA_CRTC_OVERFLOW) {
532 /* can always write bit 4 of CR7 */
533 if (s->cr_index == VGA_CRTC_OVERFLOW) {
534 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
535 (val & 0x10);
536 vbe_update_vgaregs(s);
537 }
538 return;
539 }
540 s->cr[s->cr_index] = val;
541 vbe_update_vgaregs(s);
542
543 switch(s->cr_index) {
544 case VGA_CRTC_H_TOTAL:
545 case VGA_CRTC_H_SYNC_START:
546 case VGA_CRTC_H_SYNC_END:
547 case VGA_CRTC_V_TOTAL:
548 case VGA_CRTC_OVERFLOW:
549 case VGA_CRTC_V_SYNC_END:
550 case VGA_CRTC_MODE:
551 s->update_retrace_info(s);
552 break;
553 }
554 break;
555 case VGA_IS1_RM:
556 case VGA_IS1_RC:
557 s->fcr = val & 0x10;
558 break;
559 }
560 }
561
562 /*
563 * Sanity check vbe register writes.
564 *
565 * As we don't have a way to signal errors to the guest in the bochs
566 * dispi interface we'll go adjust the registers to the closest valid
567 * value.
568 */
569 static void vbe_fixup_regs(VGACommonState *s)
570 {
571 uint16_t *r = s->vbe_regs;
572 uint32_t bits, linelength, maxy, offset;
573
574 if (!vbe_enabled(s)) {
575 /* vbe is turned off -- nothing to do */
576 return;
577 }
578
579 /* check depth */
580 switch (r[VBE_DISPI_INDEX_BPP]) {
581 case 4:
582 case 8:
583 case 16:
584 case 24:
585 case 32:
586 bits = r[VBE_DISPI_INDEX_BPP];
587 break;
588 case 15:
589 bits = 16;
590 break;
591 default:
592 bits = r[VBE_DISPI_INDEX_BPP] = 8;
593 break;
594 }
595
596 /* check width */
597 r[VBE_DISPI_INDEX_XRES] &= ~7u;
598 if (r[VBE_DISPI_INDEX_XRES] == 0) {
599 r[VBE_DISPI_INDEX_XRES] = 8;
600 }
601 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
602 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
603 }
604 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
605 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
606 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
607 }
608 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
609 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
610 }
611
612 /* check height */
613 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
614 maxy = s->vbe_size / linelength;
615 if (r[VBE_DISPI_INDEX_YRES] == 0) {
616 r[VBE_DISPI_INDEX_YRES] = 1;
617 }
618 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
619 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
620 }
621 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
622 r[VBE_DISPI_INDEX_YRES] = maxy;
623 }
624
625 /* check offset */
626 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
627 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
628 }
629 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
630 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
631 }
632 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
633 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
634 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
635 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
636 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
637 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
638 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
639 offset = 0;
640 }
641 }
642
643 /* update vga state */
644 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
645 s->vbe_line_offset = linelength;
646 s->vbe_start_addr = offset / 4;
647 }
648
649 /* we initialize the VGA graphic mode */
650 static void vbe_update_vgaregs(VGACommonState *s)
651 {
652 int h, shift_control;
653
654 if (!vbe_enabled(s)) {
655 /* vbe is turned off -- nothing to do */
656 return;
657 }
658
659 /* graphic mode + memory map 1 */
660 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
661 VGA_GR06_GRAPHICS_MODE;
662 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
663 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
664 /* width */
665 s->cr[VGA_CRTC_H_DISP] =
666 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
667 /* height (only meaningful if < 1024) */
668 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
669 s->cr[VGA_CRTC_V_DISP_END] = h;
670 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
671 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
672 /* line compare to 1023 */
673 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
674 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
675 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
676
677 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
678 shift_control = 0;
679 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
680 } else {
681 shift_control = 2;
682 /* set chain 4 mode */
683 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
684 /* activate all planes */
685 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
686 }
687 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
688 (shift_control << 5);
689 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
690 }
691
692 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
693 {
694 VGACommonState *s = opaque;
695 return s->vbe_index;
696 }
697
698 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
699 {
700 VGACommonState *s = opaque;
701 uint32_t val;
702
703 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
704 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
705 switch(s->vbe_index) {
706 /* XXX: do not hardcode ? */
707 case VBE_DISPI_INDEX_XRES:
708 val = VBE_DISPI_MAX_XRES;
709 break;
710 case VBE_DISPI_INDEX_YRES:
711 val = VBE_DISPI_MAX_YRES;
712 break;
713 case VBE_DISPI_INDEX_BPP:
714 val = VBE_DISPI_MAX_BPP;
715 break;
716 default:
717 val = s->vbe_regs[s->vbe_index];
718 break;
719 }
720 } else {
721 val = s->vbe_regs[s->vbe_index];
722 }
723 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
724 val = s->vbe_size / (64 * 1024);
725 } else {
726 val = 0;
727 }
728 trace_vga_vbe_read(s->vbe_index, val);
729 return val;
730 }
731
732 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
733 {
734 VGACommonState *s = opaque;
735 s->vbe_index = val;
736 }
737
738 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
739 {
740 VGACommonState *s = opaque;
741
742 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
743 trace_vga_vbe_write(s->vbe_index, val);
744 switch(s->vbe_index) {
745 case VBE_DISPI_INDEX_ID:
746 if (val == VBE_DISPI_ID0 ||
747 val == VBE_DISPI_ID1 ||
748 val == VBE_DISPI_ID2 ||
749 val == VBE_DISPI_ID3 ||
750 val == VBE_DISPI_ID4) {
751 s->vbe_regs[s->vbe_index] = val;
752 }
753 break;
754 case VBE_DISPI_INDEX_XRES:
755 case VBE_DISPI_INDEX_YRES:
756 case VBE_DISPI_INDEX_BPP:
757 case VBE_DISPI_INDEX_VIRT_WIDTH:
758 case VBE_DISPI_INDEX_X_OFFSET:
759 case VBE_DISPI_INDEX_Y_OFFSET:
760 s->vbe_regs[s->vbe_index] = val;
761 vbe_fixup_regs(s);
762 vbe_update_vgaregs(s);
763 break;
764 case VBE_DISPI_INDEX_BANK:
765 val &= s->vbe_bank_mask;
766 s->vbe_regs[s->vbe_index] = val;
767 s->bank_offset = (val << 16);
768 vga_update_memory_access(s);
769 break;
770 case VBE_DISPI_INDEX_ENABLE:
771 if ((val & VBE_DISPI_ENABLED) &&
772 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
773
774 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
775 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
776 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
777 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
778 vbe_fixup_regs(s);
779 vbe_update_vgaregs(s);
780
781 /* clear the screen */
782 if (!(val & VBE_DISPI_NOCLEARMEM)) {
783 memset(s->vram_ptr, 0,
784 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
785 }
786 } else {
787 s->bank_offset = 0;
788 }
789 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
790 s->vbe_regs[s->vbe_index] = val;
791 vga_update_memory_access(s);
792 break;
793 default:
794 break;
795 }
796 }
797 }
798
799 /* called for accesses between 0xa0000 and 0xc0000 */
800 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
801 {
802 int memory_map_mode, plane;
803 uint32_t ret;
804
805 /* convert to VGA memory offset */
806 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
807 addr &= 0x1ffff;
808 switch(memory_map_mode) {
809 case 0:
810 break;
811 case 1:
812 if (addr >= 0x10000)
813 return 0xff;
814 addr += s->bank_offset;
815 break;
816 case 2:
817 addr -= 0x10000;
818 if (addr >= 0x8000)
819 return 0xff;
820 break;
821 default:
822 case 3:
823 addr -= 0x18000;
824 if (addr >= 0x8000)
825 return 0xff;
826 break;
827 }
828
829 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
830 /* chain 4 mode : simplest access */
831 assert(addr < s->vram_size);
832 ret = s->vram_ptr[addr];
833 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
834 /* odd/even mode (aka text mode mapping) */
835 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
836 addr = ((addr & ~1) << 1) | plane;
837 if (addr >= s->vram_size) {
838 return 0xff;
839 }
840 ret = s->vram_ptr[addr];
841 } else {
842 /* standard VGA latched access */
843 if (addr * sizeof(uint32_t) >= s->vram_size) {
844 return 0xff;
845 }
846 s->latch = ((uint32_t *)s->vram_ptr)[addr];
847
848 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
849 /* read mode 0 */
850 plane = s->gr[VGA_GFX_PLANE_READ];
851 ret = GET_PLANE(s->latch, plane);
852 } else {
853 /* read mode 1 */
854 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
855 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
856 ret |= ret >> 16;
857 ret |= ret >> 8;
858 ret = (~ret) & 0xff;
859 }
860 }
861 return ret;
862 }
863
864 /* called for accesses between 0xa0000 and 0xc0000 */
865 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
866 {
867 int memory_map_mode, plane, write_mode, b, func_select, mask;
868 uint32_t write_mask, bit_mask, set_mask;
869
870 #ifdef DEBUG_VGA_MEM
871 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
872 #endif
873 /* convert to VGA memory offset */
874 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
875 addr &= 0x1ffff;
876 switch(memory_map_mode) {
877 case 0:
878 break;
879 case 1:
880 if (addr >= 0x10000)
881 return;
882 addr += s->bank_offset;
883 break;
884 case 2:
885 addr -= 0x10000;
886 if (addr >= 0x8000)
887 return;
888 break;
889 default:
890 case 3:
891 addr -= 0x18000;
892 if (addr >= 0x8000)
893 return;
894 break;
895 }
896
897 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
898 /* chain 4 mode : simplest access */
899 plane = addr & 3;
900 mask = (1 << plane);
901 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
902 assert(addr < s->vram_size);
903 s->vram_ptr[addr] = val;
904 #ifdef DEBUG_VGA_MEM
905 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
906 #endif
907 s->plane_updated |= mask; /* only used to detect font change */
908 memory_region_set_dirty(&s->vram, addr, 1);
909 }
910 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
911 /* odd/even mode (aka text mode mapping) */
912 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
913 mask = (1 << plane);
914 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
915 addr = ((addr & ~1) << 1) | plane;
916 if (addr >= s->vram_size) {
917 return;
918 }
919 s->vram_ptr[addr] = val;
920 #ifdef DEBUG_VGA_MEM
921 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
922 #endif
923 s->plane_updated |= mask; /* only used to detect font change */
924 memory_region_set_dirty(&s->vram, addr, 1);
925 }
926 } else {
927 /* standard VGA latched access */
928 write_mode = s->gr[VGA_GFX_MODE] & 3;
929 switch(write_mode) {
930 default:
931 case 0:
932 /* rotate */
933 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
934 val = ((val >> b) | (val << (8 - b))) & 0xff;
935 val |= val << 8;
936 val |= val << 16;
937
938 /* apply set/reset mask */
939 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
940 val = (val & ~set_mask) |
941 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
942 bit_mask = s->gr[VGA_GFX_BIT_MASK];
943 break;
944 case 1:
945 val = s->latch;
946 goto do_write;
947 case 2:
948 val = mask16[val & 0x0f];
949 bit_mask = s->gr[VGA_GFX_BIT_MASK];
950 break;
951 case 3:
952 /* rotate */
953 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
954 val = (val >> b) | (val << (8 - b));
955
956 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
957 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
958 break;
959 }
960
961 /* apply logical operation */
962 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
963 switch(func_select) {
964 case 0:
965 default:
966 /* nothing to do */
967 break;
968 case 1:
969 /* and */
970 val &= s->latch;
971 break;
972 case 2:
973 /* or */
974 val |= s->latch;
975 break;
976 case 3:
977 /* xor */
978 val ^= s->latch;
979 break;
980 }
981
982 /* apply bit mask */
983 bit_mask |= bit_mask << 8;
984 bit_mask |= bit_mask << 16;
985 val = (val & bit_mask) | (s->latch & ~bit_mask);
986
987 do_write:
988 /* mask data according to sr[2] */
989 mask = sr(s, VGA_SEQ_PLANE_WRITE);
990 s->plane_updated |= mask; /* only used to detect font change */
991 write_mask = mask16[mask];
992 if (addr * sizeof(uint32_t) >= s->vram_size) {
993 return;
994 }
995 ((uint32_t *)s->vram_ptr)[addr] =
996 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
997 (val & write_mask);
998 #ifdef DEBUG_VGA_MEM
999 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1000 addr * 4, write_mask, val);
1001 #endif
1002 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1003 }
1004 }
1005
1006 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1007 uint32_t srcaddr, int width);
1008
1009 #include "vga-helpers.h"
1010
1011 /* return true if the palette was modified */
1012 static int update_palette16(VGACommonState *s)
1013 {
1014 int full_update, i;
1015 uint32_t v, col, *palette;
1016
1017 full_update = 0;
1018 palette = s->last_palette;
1019 for(i = 0; i < 16; i++) {
1020 v = s->ar[i];
1021 if (s->ar[VGA_ATC_MODE] & 0x80) {
1022 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1023 } else {
1024 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1025 }
1026 v = v * 3;
1027 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1028 c6_to_8(s->palette[v + 1]),
1029 c6_to_8(s->palette[v + 2]));
1030 if (col != palette[i]) {
1031 full_update = 1;
1032 palette[i] = col;
1033 }
1034 }
1035 return full_update;
1036 }
1037
1038 /* return true if the palette was modified */
1039 static int update_palette256(VGACommonState *s)
1040 {
1041 int full_update, i;
1042 uint32_t v, col, *palette;
1043
1044 full_update = 0;
1045 palette = s->last_palette;
1046 v = 0;
1047 for(i = 0; i < 256; i++) {
1048 if (s->dac_8bit) {
1049 col = rgb_to_pixel32(s->palette[v],
1050 s->palette[v + 1],
1051 s->palette[v + 2]);
1052 } else {
1053 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1054 c6_to_8(s->palette[v + 1]),
1055 c6_to_8(s->palette[v + 2]));
1056 }
1057 if (col != palette[i]) {
1058 full_update = 1;
1059 palette[i] = col;
1060 }
1061 v += 3;
1062 }
1063 return full_update;
1064 }
1065
1066 static void vga_get_offsets(VGACommonState *s,
1067 uint32_t *pline_offset,
1068 uint32_t *pstart_addr,
1069 uint32_t *pline_compare)
1070 {
1071 uint32_t start_addr, line_offset, line_compare;
1072
1073 if (vbe_enabled(s)) {
1074 line_offset = s->vbe_line_offset;
1075 start_addr = s->vbe_start_addr;
1076 line_compare = 65535;
1077 } else {
1078 /* compute line_offset in bytes */
1079 line_offset = s->cr[VGA_CRTC_OFFSET];
1080 line_offset <<= 3;
1081
1082 /* starting address */
1083 start_addr = s->cr[VGA_CRTC_START_LO] |
1084 (s->cr[VGA_CRTC_START_HI] << 8);
1085
1086 /* line compare */
1087 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1088 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1089 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1090 }
1091 *pline_offset = line_offset;
1092 *pstart_addr = start_addr;
1093 *pline_compare = line_compare;
1094 }
1095
1096 /* update start_addr and line_offset. Return TRUE if modified */
1097 static int update_basic_params(VGACommonState *s)
1098 {
1099 int full_update;
1100 uint32_t start_addr, line_offset, line_compare;
1101
1102 full_update = 0;
1103
1104 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1105
1106 if (line_offset != s->line_offset ||
1107 start_addr != s->start_addr ||
1108 line_compare != s->line_compare) {
1109 s->line_offset = line_offset;
1110 s->start_addr = start_addr;
1111 s->line_compare = line_compare;
1112 full_update = 1;
1113 }
1114 return full_update;
1115 }
1116
1117
1118 static const uint8_t cursor_glyph[32 * 4] = {
1119 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1126 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1128 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1129 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1130 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1135 };
1136
1137 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1138 int *pcwidth, int *pcheight)
1139 {
1140 int width, cwidth, height, cheight;
1141
1142 /* total width & height */
1143 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1144 cwidth = 8;
1145 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1146 cwidth = 9;
1147 }
1148 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1149 cwidth = 16; /* NOTE: no 18 pixel wide */
1150 }
1151 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1152 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1153 /* ugly hack for CGA 160x100x16 - explain me the logic */
1154 height = 100;
1155 } else {
1156 height = s->cr[VGA_CRTC_V_DISP_END] |
1157 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1158 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1159 height = (height + 1) / cheight;
1160 }
1161
1162 *pwidth = width;
1163 *pheight = height;
1164 *pcwidth = cwidth;
1165 *pcheight = cheight;
1166 }
1167
1168 /*
1169 * Text mode update
1170 * Missing:
1171 * - double scan
1172 * - double width
1173 * - underline
1174 * - flashing
1175 */
1176 static void vga_draw_text(VGACommonState *s, int full_update)
1177 {
1178 DisplaySurface *surface = qemu_console_surface(s->con);
1179 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1180 int cx_min, cx_max, linesize, x_incr, line, line1;
1181 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1182 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1183 const uint8_t *font_ptr, *font_base[2];
1184 int dup9, line_offset;
1185 uint32_t *palette;
1186 uint32_t *ch_attr_ptr;
1187 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1188
1189 /* compute font data address (in plane 2) */
1190 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1191 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1192 if (offset != s->font_offsets[0]) {
1193 s->font_offsets[0] = offset;
1194 full_update = 1;
1195 }
1196 font_base[0] = s->vram_ptr + offset;
1197
1198 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1199 font_base[1] = s->vram_ptr + offset;
1200 if (offset != s->font_offsets[1]) {
1201 s->font_offsets[1] = offset;
1202 full_update = 1;
1203 }
1204 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1205 /* if the plane 2 was modified since the last display, it
1206 indicates the font may have been modified */
1207 s->plane_updated = 0;
1208 full_update = 1;
1209 }
1210 full_update |= update_basic_params(s);
1211
1212 line_offset = s->line_offset;
1213
1214 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1215 if ((height * width) <= 1) {
1216 /* better than nothing: exit if transient size is too small */
1217 return;
1218 }
1219 if ((height * width) > CH_ATTR_SIZE) {
1220 /* better than nothing: exit if transient size is too big */
1221 return;
1222 }
1223
1224 if (width != s->last_width || height != s->last_height ||
1225 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1226 s->last_scr_width = width * cw;
1227 s->last_scr_height = height * cheight;
1228 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1229 surface = qemu_console_surface(s->con);
1230 dpy_text_resize(s->con, width, height);
1231 s->last_depth = 0;
1232 s->last_width = width;
1233 s->last_height = height;
1234 s->last_ch = cheight;
1235 s->last_cw = cw;
1236 full_update = 1;
1237 }
1238 full_update |= update_palette16(s);
1239 palette = s->last_palette;
1240 x_incr = cw * surface_bytes_per_pixel(surface);
1241
1242 if (full_update) {
1243 s->full_update_text = 1;
1244 }
1245 if (s->full_update_gfx) {
1246 s->full_update_gfx = 0;
1247 full_update |= 1;
1248 }
1249
1250 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1251 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1252 if (cursor_offset != s->cursor_offset ||
1253 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1254 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1255 /* if the cursor position changed, we update the old and new
1256 chars */
1257 if (s->cursor_offset < CH_ATTR_SIZE)
1258 s->last_ch_attr[s->cursor_offset] = -1;
1259 if (cursor_offset < CH_ATTR_SIZE)
1260 s->last_ch_attr[cursor_offset] = -1;
1261 s->cursor_offset = cursor_offset;
1262 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1263 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1264 }
1265 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1266 if (now >= s->cursor_blink_time) {
1267 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1268 s->cursor_visible_phase = !s->cursor_visible_phase;
1269 }
1270
1271 dest = surface_data(surface);
1272 linesize = surface_stride(surface);
1273 ch_attr_ptr = s->last_ch_attr;
1274 line = 0;
1275 offset = s->start_addr * 4;
1276 for(cy = 0; cy < height; cy++) {
1277 d1 = dest;
1278 src = s->vram_ptr + offset;
1279 cx_min = width;
1280 cx_max = -1;
1281 for(cx = 0; cx < width; cx++) {
1282 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) {
1283 break;
1284 }
1285 ch_attr = *(uint16_t *)src;
1286 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1287 if (cx < cx_min)
1288 cx_min = cx;
1289 if (cx > cx_max)
1290 cx_max = cx;
1291 *ch_attr_ptr = ch_attr;
1292 #ifdef HOST_WORDS_BIGENDIAN
1293 ch = ch_attr >> 8;
1294 cattr = ch_attr & 0xff;
1295 #else
1296 ch = ch_attr & 0xff;
1297 cattr = ch_attr >> 8;
1298 #endif
1299 font_ptr = font_base[(cattr >> 3) & 1];
1300 font_ptr += 32 * 4 * ch;
1301 bgcol = palette[cattr >> 4];
1302 fgcol = palette[cattr & 0x0f];
1303 if (cw == 16) {
1304 vga_draw_glyph16(d1, linesize,
1305 font_ptr, cheight, fgcol, bgcol);
1306 } else if (cw != 9) {
1307 vga_draw_glyph8(d1, linesize,
1308 font_ptr, cheight, fgcol, bgcol);
1309 } else {
1310 dup9 = 0;
1311 if (ch >= 0xb0 && ch <= 0xdf &&
1312 (s->ar[VGA_ATC_MODE] & 0x04)) {
1313 dup9 = 1;
1314 }
1315 vga_draw_glyph9(d1, linesize,
1316 font_ptr, cheight, fgcol, bgcol, dup9);
1317 }
1318 if (src == cursor_ptr &&
1319 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1320 s->cursor_visible_phase) {
1321 int line_start, line_last, h;
1322 /* draw the cursor */
1323 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1324 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1325 /* XXX: check that */
1326 if (line_last > cheight - 1)
1327 line_last = cheight - 1;
1328 if (line_last >= line_start && line_start < cheight) {
1329 h = line_last - line_start + 1;
1330 d = d1 + linesize * line_start;
1331 if (cw == 16) {
1332 vga_draw_glyph16(d, linesize,
1333 cursor_glyph, h, fgcol, bgcol);
1334 } else if (cw != 9) {
1335 vga_draw_glyph8(d, linesize,
1336 cursor_glyph, h, fgcol, bgcol);
1337 } else {
1338 vga_draw_glyph9(d, linesize,
1339 cursor_glyph, h, fgcol, bgcol, 1);
1340 }
1341 }
1342 }
1343 }
1344 d1 += x_incr;
1345 src += 4;
1346 ch_attr_ptr++;
1347 }
1348 if (cx_max != -1) {
1349 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1350 (cx_max - cx_min + 1) * cw, cheight);
1351 }
1352 dest += linesize * cheight;
1353 line1 = line + cheight;
1354 offset += line_offset;
1355 if (line < s->line_compare && line1 >= s->line_compare) {
1356 offset = 0;
1357 }
1358 line = line1;
1359 }
1360 }
1361
1362 enum {
1363 VGA_DRAW_LINE2,
1364 VGA_DRAW_LINE2D2,
1365 VGA_DRAW_LINE4,
1366 VGA_DRAW_LINE4D2,
1367 VGA_DRAW_LINE8D2,
1368 VGA_DRAW_LINE8,
1369 VGA_DRAW_LINE15_LE,
1370 VGA_DRAW_LINE16_LE,
1371 VGA_DRAW_LINE24_LE,
1372 VGA_DRAW_LINE32_LE,
1373 VGA_DRAW_LINE15_BE,
1374 VGA_DRAW_LINE16_BE,
1375 VGA_DRAW_LINE24_BE,
1376 VGA_DRAW_LINE32_BE,
1377 VGA_DRAW_LINE_NB,
1378 };
1379
1380 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1381 vga_draw_line2,
1382 vga_draw_line2d2,
1383 vga_draw_line4,
1384 vga_draw_line4d2,
1385 vga_draw_line8d2,
1386 vga_draw_line8,
1387 vga_draw_line15_le,
1388 vga_draw_line16_le,
1389 vga_draw_line24_le,
1390 vga_draw_line32_le,
1391 vga_draw_line15_be,
1392 vga_draw_line16_be,
1393 vga_draw_line24_be,
1394 vga_draw_line32_be,
1395 };
1396
1397 static int vga_get_bpp(VGACommonState *s)
1398 {
1399 int ret;
1400
1401 if (vbe_enabled(s)) {
1402 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1403 } else {
1404 ret = 0;
1405 }
1406 return ret;
1407 }
1408
1409 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1410 {
1411 int width, height;
1412
1413 if (vbe_enabled(s)) {
1414 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1415 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1416 } else {
1417 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1418 height = s->cr[VGA_CRTC_V_DISP_END] |
1419 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1420 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1421 height = (height + 1);
1422 }
1423 *pwidth = width;
1424 *pheight = height;
1425 }
1426
1427 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1428 {
1429 int y;
1430 if (y1 >= VGA_MAX_HEIGHT)
1431 return;
1432 if (y2 >= VGA_MAX_HEIGHT)
1433 y2 = VGA_MAX_HEIGHT;
1434 for(y = y1; y < y2; y++) {
1435 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1436 }
1437 }
1438
1439 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1440 {
1441 if (y >= VGA_MAX_HEIGHT) {
1442 return false;
1443 }
1444 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1445 }
1446
1447 void vga_dirty_log_start(VGACommonState *s)
1448 {
1449 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1450 }
1451
1452 void vga_dirty_log_stop(VGACommonState *s)
1453 {
1454 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1455 }
1456
1457 /*
1458 * graphic modes
1459 */
1460 static void vga_draw_graphic(VGACommonState *s, int full_update)
1461 {
1462 DisplaySurface *surface = qemu_console_surface(s->con);
1463 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1464 int width, height, shift_control, bwidth, bits;
1465 ram_addr_t page0, page1, region_start, region_end;
1466 DirtyBitmapSnapshot *snap = NULL;
1467 int disp_width, multi_scan, multi_run;
1468 uint8_t *d;
1469 uint32_t v, addr1, addr;
1470 vga_draw_line_func *vga_draw_line = NULL;
1471 bool share_surface, force_shadow = false;
1472 pixman_format_code_t format;
1473 #ifdef HOST_WORDS_BIGENDIAN
1474 bool byteswap = !s->big_endian_fb;
1475 #else
1476 bool byteswap = s->big_endian_fb;
1477 #endif
1478
1479 full_update |= update_basic_params(s);
1480
1481 s->get_resolution(s, &width, &height);
1482 disp_width = width;
1483 depth = s->get_bpp(s);
1484
1485 region_start = (s->start_addr * 4);
1486 region_end = region_start + (ram_addr_t)s->line_offset * height;
1487 region_end += width * depth / 8; /* scanline length */
1488 region_end -= s->line_offset;
1489 if (region_end > s->vbe_size || depth == 0 || depth == 15) {
1490 /*
1491 * We land here on:
1492 * - wraps around (can happen with cirrus vbe modes)
1493 * - depth == 0 (256 color palette video mode)
1494 * - depth == 15
1495 *
1496 * Take the safe and slow route:
1497 * - create a dirty bitmap snapshot for all vga memory.
1498 * - force shadowing (so all vga memory access goes
1499 * through vga_read_*() helpers).
1500 *
1501 * Given this affects only vga features which are pretty much
1502 * unused by modern guests there should be no performance
1503 * impact.
1504 */
1505 region_start = 0;
1506 region_end = s->vbe_size;
1507 force_shadow = true;
1508 }
1509
1510 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1511 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1512 if (shift_control != 1) {
1513 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1514 - 1;
1515 } else {
1516 /* in CGA modes, multi_scan is ignored */
1517 /* XXX: is it correct ? */
1518 multi_scan = double_scan;
1519 }
1520 multi_run = multi_scan;
1521 if (shift_control != s->shift_control ||
1522 double_scan != s->double_scan) {
1523 full_update = 1;
1524 s->shift_control = shift_control;
1525 s->double_scan = double_scan;
1526 }
1527
1528 if (shift_control == 0) {
1529 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1530 disp_width <<= 1;
1531 }
1532 } else if (shift_control == 1) {
1533 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1534 disp_width <<= 1;
1535 }
1536 }
1537
1538 /*
1539 * Check whether we can share the surface with the backend
1540 * or whether we need a shadow surface. We share native
1541 * endian surfaces for 15bpp and above and byteswapped
1542 * surfaces for 24bpp and above.
1543 */
1544 format = qemu_default_pixman_format(depth, !byteswap);
1545 if (format) {
1546 share_surface = dpy_gfx_check_format(s->con, format)
1547 && !s->force_shadow && !force_shadow;
1548 } else {
1549 share_surface = false;
1550 }
1551
1552 if (s->line_offset != s->last_line_offset ||
1553 disp_width != s->last_width ||
1554 height != s->last_height ||
1555 s->last_depth != depth ||
1556 s->last_byteswap != byteswap ||
1557 share_surface != is_buffer_shared(surface)) {
1558 /* display parameters changed -> need new display surface */
1559 s->last_scr_width = disp_width;
1560 s->last_scr_height = height;
1561 s->last_width = disp_width;
1562 s->last_height = height;
1563 s->last_line_offset = s->line_offset;
1564 s->last_depth = depth;
1565 s->last_byteswap = byteswap;
1566 full_update = 1;
1567 }
1568 if (surface_data(surface) != s->vram_ptr + (s->start_addr * 4)
1569 && is_buffer_shared(surface)) {
1570 /* base address changed (page flip) -> shared display surfaces
1571 * must be updated with the new base address */
1572 full_update = 1;
1573 }
1574
1575 if (full_update) {
1576 if (share_surface) {
1577 surface = qemu_create_displaysurface_from(disp_width,
1578 height, format, s->line_offset,
1579 s->vram_ptr + (s->start_addr * 4));
1580 dpy_gfx_replace_surface(s->con, surface);
1581 } else {
1582 qemu_console_resize(s->con, disp_width, height);
1583 surface = qemu_console_surface(s->con);
1584 }
1585 }
1586
1587 if (shift_control == 0) {
1588 full_update |= update_palette16(s);
1589 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1590 v = VGA_DRAW_LINE4D2;
1591 } else {
1592 v = VGA_DRAW_LINE4;
1593 }
1594 bits = 4;
1595 } else if (shift_control == 1) {
1596 full_update |= update_palette16(s);
1597 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1598 v = VGA_DRAW_LINE2D2;
1599 } else {
1600 v = VGA_DRAW_LINE2;
1601 }
1602 bits = 4;
1603 } else {
1604 switch(s->get_bpp(s)) {
1605 default:
1606 case 0:
1607 full_update |= update_palette256(s);
1608 v = VGA_DRAW_LINE8D2;
1609 bits = 4;
1610 break;
1611 case 8:
1612 full_update |= update_palette256(s);
1613 v = VGA_DRAW_LINE8;
1614 bits = 8;
1615 break;
1616 case 15:
1617 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1618 bits = 16;
1619 break;
1620 case 16:
1621 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1622 bits = 16;
1623 break;
1624 case 24:
1625 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1626 bits = 24;
1627 break;
1628 case 32:
1629 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1630 bits = 32;
1631 break;
1632 }
1633 }
1634 vga_draw_line = vga_draw_line_table[v];
1635
1636 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1637 s->cursor_invalidate(s);
1638 }
1639
1640 #if 0
1641 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",
1642 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1643 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1644 #endif
1645 addr1 = (s->start_addr * 4);
1646 bwidth = DIV_ROUND_UP(width * bits, 8);
1647 y_start = -1;
1648 d = surface_data(surface);
1649 linesize = surface_stride(surface);
1650 y1 = 0;
1651
1652 if (!full_update) {
1653 if (s->line_compare < height) {
1654 /* split screen mode */
1655 region_start = 0;
1656 }
1657 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1658 region_end - region_start,
1659 DIRTY_MEMORY_VGA);
1660 }
1661
1662 for(y = 0; y < height; y++) {
1663 addr = addr1;
1664 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1665 int shift;
1666 /* CGA compatibility handling */
1667 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1668 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1669 }
1670 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1671 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1672 }
1673 update = full_update;
1674 page0 = addr & s->vbe_size_mask;
1675 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1676 if (full_update) {
1677 update = 1;
1678 } else if (page1 < page0) {
1679 /* scanline wraps from end of video memory to the start */
1680 assert(force_shadow);
1681 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1682 page0, s->vbe_size - page0);
1683 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1684 0, page1);
1685 } else {
1686 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1687 page0, page1 - page0);
1688 }
1689 /* explicit invalidation for the hardware cursor (cirrus only) */
1690 update |= vga_scanline_invalidated(s, y);
1691 if (update) {
1692 if (y_start < 0)
1693 y_start = y;
1694 if (!(is_buffer_shared(surface))) {
1695 vga_draw_line(s, d, addr, width);
1696 if (s->cursor_draw_line)
1697 s->cursor_draw_line(s, d, y);
1698 }
1699 } else {
1700 if (y_start >= 0) {
1701 /* flush to display */
1702 dpy_gfx_update(s->con, 0, y_start,
1703 disp_width, y - y_start);
1704 y_start = -1;
1705 }
1706 }
1707 if (!multi_run) {
1708 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1709 if ((y1 & mask) == mask)
1710 addr1 += s->line_offset;
1711 y1++;
1712 multi_run = multi_scan;
1713 } else {
1714 multi_run--;
1715 }
1716 /* line compare acts on the displayed lines */
1717 if (y == s->line_compare)
1718 addr1 = 0;
1719 d += linesize;
1720 }
1721 if (y_start >= 0) {
1722 /* flush to display */
1723 dpy_gfx_update(s->con, 0, y_start,
1724 disp_width, y - y_start);
1725 }
1726 g_free(snap);
1727 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1728 }
1729
1730 static void vga_draw_blank(VGACommonState *s, int full_update)
1731 {
1732 DisplaySurface *surface = qemu_console_surface(s->con);
1733 int i, w;
1734 uint8_t *d;
1735
1736 if (!full_update)
1737 return;
1738 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1739 return;
1740
1741 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1742 d = surface_data(surface);
1743 for(i = 0; i < s->last_scr_height; i++) {
1744 memset(d, 0, w);
1745 d += surface_stride(surface);
1746 }
1747 dpy_gfx_update(s->con, 0, 0,
1748 s->last_scr_width, s->last_scr_height);
1749 }
1750
1751 #define GMODE_TEXT 0
1752 #define GMODE_GRAPH 1
1753 #define GMODE_BLANK 2
1754
1755 static void vga_update_display(void *opaque)
1756 {
1757 VGACommonState *s = opaque;
1758 DisplaySurface *surface = qemu_console_surface(s->con);
1759 int full_update, graphic_mode;
1760
1761 qemu_flush_coalesced_mmio_buffer();
1762
1763 if (surface_bits_per_pixel(surface) == 0) {
1764 /* nothing to do */
1765 } else {
1766 full_update = 0;
1767 if (!(s->ar_index & 0x20)) {
1768 graphic_mode = GMODE_BLANK;
1769 } else {
1770 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1771 }
1772 if (graphic_mode != s->graphic_mode) {
1773 s->graphic_mode = graphic_mode;
1774 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1775 full_update = 1;
1776 }
1777 switch(graphic_mode) {
1778 case GMODE_TEXT:
1779 vga_draw_text(s, full_update);
1780 break;
1781 case GMODE_GRAPH:
1782 vga_draw_graphic(s, full_update);
1783 break;
1784 case GMODE_BLANK:
1785 default:
1786 vga_draw_blank(s, full_update);
1787 break;
1788 }
1789 }
1790 }
1791
1792 /* force a full display refresh */
1793 static void vga_invalidate_display(void *opaque)
1794 {
1795 VGACommonState *s = opaque;
1796
1797 s->last_width = -1;
1798 s->last_height = -1;
1799 }
1800
1801 void vga_common_reset(VGACommonState *s)
1802 {
1803 s->sr_index = 0;
1804 memset(s->sr, '\0', sizeof(s->sr));
1805 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1806 s->gr_index = 0;
1807 memset(s->gr, '\0', sizeof(s->gr));
1808 s->ar_index = 0;
1809 memset(s->ar, '\0', sizeof(s->ar));
1810 s->ar_flip_flop = 0;
1811 s->cr_index = 0;
1812 memset(s->cr, '\0', sizeof(s->cr));
1813 s->msr = 0;
1814 s->fcr = 0;
1815 s->st00 = 0;
1816 s->st01 = 0;
1817 s->dac_state = 0;
1818 s->dac_sub_index = 0;
1819 s->dac_read_index = 0;
1820 s->dac_write_index = 0;
1821 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1822 s->dac_8bit = 0;
1823 memset(s->palette, '\0', sizeof(s->palette));
1824 s->bank_offset = 0;
1825 s->vbe_index = 0;
1826 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1827 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1828 s->vbe_start_addr = 0;
1829 s->vbe_line_offset = 0;
1830 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1831 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1832 s->graphic_mode = -1; /* force full update */
1833 s->shift_control = 0;
1834 s->double_scan = 0;
1835 s->line_offset = 0;
1836 s->line_compare = 0;
1837 s->start_addr = 0;
1838 s->plane_updated = 0;
1839 s->last_cw = 0;
1840 s->last_ch = 0;
1841 s->last_width = 0;
1842 s->last_height = 0;
1843 s->last_scr_width = 0;
1844 s->last_scr_height = 0;
1845 s->cursor_start = 0;
1846 s->cursor_end = 0;
1847 s->cursor_offset = 0;
1848 s->big_endian_fb = s->default_endian_fb;
1849 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1850 memset(s->last_palette, '\0', sizeof(s->last_palette));
1851 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1852 switch (vga_retrace_method) {
1853 case VGA_RETRACE_DUMB:
1854 break;
1855 case VGA_RETRACE_PRECISE:
1856 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1857 break;
1858 }
1859 vga_update_memory_access(s);
1860 }
1861
1862 static void vga_reset(void *opaque)
1863 {
1864 VGACommonState *s = opaque;
1865 vga_common_reset(s);
1866 }
1867
1868 #define TEXTMODE_X(x) ((x) % width)
1869 #define TEXTMODE_Y(x) ((x) / width)
1870 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1871 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1872 /* relay text rendering to the display driver
1873 * instead of doing a full vga_update_display() */
1874 static void vga_update_text(void *opaque, console_ch_t *chardata)
1875 {
1876 VGACommonState *s = opaque;
1877 int graphic_mode, i, cursor_offset, cursor_visible;
1878 int cw, cheight, width, height, size, c_min, c_max;
1879 uint32_t *src;
1880 console_ch_t *dst, val;
1881 char msg_buffer[80];
1882 int full_update = 0;
1883
1884 qemu_flush_coalesced_mmio_buffer();
1885
1886 if (!(s->ar_index & 0x20)) {
1887 graphic_mode = GMODE_BLANK;
1888 } else {
1889 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1890 }
1891 if (graphic_mode != s->graphic_mode) {
1892 s->graphic_mode = graphic_mode;
1893 full_update = 1;
1894 }
1895 if (s->last_width == -1) {
1896 s->last_width = 0;
1897 full_update = 1;
1898 }
1899
1900 switch (graphic_mode) {
1901 case GMODE_TEXT:
1902 /* TODO: update palette */
1903 full_update |= update_basic_params(s);
1904
1905 /* total width & height */
1906 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1907 cw = 8;
1908 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1909 cw = 9;
1910 }
1911 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1912 cw = 16; /* NOTE: no 18 pixel wide */
1913 }
1914 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1915 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1916 /* ugly hack for CGA 160x100x16 - explain me the logic */
1917 height = 100;
1918 } else {
1919 height = s->cr[VGA_CRTC_V_DISP_END] |
1920 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1921 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1922 height = (height + 1) / cheight;
1923 }
1924
1925 size = (height * width);
1926 if (size > CH_ATTR_SIZE) {
1927 if (!full_update)
1928 return;
1929
1930 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1931 width, height);
1932 break;
1933 }
1934
1935 if (width != s->last_width || height != s->last_height ||
1936 cw != s->last_cw || cheight != s->last_ch) {
1937 s->last_scr_width = width * cw;
1938 s->last_scr_height = height * cheight;
1939 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1940 dpy_text_resize(s->con, width, height);
1941 s->last_depth = 0;
1942 s->last_width = width;
1943 s->last_height = height;
1944 s->last_ch = cheight;
1945 s->last_cw = cw;
1946 full_update = 1;
1947 }
1948
1949 if (full_update) {
1950 s->full_update_gfx = 1;
1951 }
1952 if (s->full_update_text) {
1953 s->full_update_text = 0;
1954 full_update |= 1;
1955 }
1956
1957 /* Update "hardware" cursor */
1958 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1959 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1960 if (cursor_offset != s->cursor_offset ||
1961 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1962 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1963 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1964 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1965 dpy_text_cursor(s->con,
1966 TEXTMODE_X(cursor_offset),
1967 TEXTMODE_Y(cursor_offset));
1968 else
1969 dpy_text_cursor(s->con, -1, -1);
1970 s->cursor_offset = cursor_offset;
1971 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1972 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1973 }
1974
1975 src = (uint32_t *) s->vram_ptr + s->start_addr;
1976 dst = chardata;
1977
1978 if (full_update) {
1979 for (i = 0; i < size; src ++, dst ++, i ++)
1980 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1981
1982 dpy_text_update(s->con, 0, 0, width, height);
1983 } else {
1984 c_max = 0;
1985
1986 for (i = 0; i < size; src ++, dst ++, i ++) {
1987 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1988 if (*dst != val) {
1989 *dst = val;
1990 c_max = i;
1991 break;
1992 }
1993 }
1994 c_min = i;
1995 for (; i < size; src ++, dst ++, i ++) {
1996 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1997 if (*dst != val) {
1998 *dst = val;
1999 c_max = i;
2000 }
2001 }
2002
2003 if (c_min <= c_max) {
2004 i = TEXTMODE_Y(c_min);
2005 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2006 }
2007 }
2008
2009 return;
2010 case GMODE_GRAPH:
2011 if (!full_update)
2012 return;
2013
2014 s->get_resolution(s, &width, &height);
2015 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2016 width, height);
2017 break;
2018 case GMODE_BLANK:
2019 default:
2020 if (!full_update)
2021 return;
2022
2023 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2024 break;
2025 }
2026
2027 /* Display a message */
2028 s->last_width = 60;
2029 s->last_height = height = 3;
2030 dpy_text_cursor(s->con, -1, -1);
2031 dpy_text_resize(s->con, s->last_width, height);
2032
2033 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2034 console_write_ch(dst ++, ' ');
2035
2036 size = strlen(msg_buffer);
2037 width = (s->last_width - size) / 2;
2038 dst = chardata + s->last_width + width;
2039 for (i = 0; i < size; i ++)
2040 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2041 QEMU_COLOR_BLACK, 1));
2042
2043 dpy_text_update(s->con, 0, 0, s->last_width, height);
2044 }
2045
2046 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2047 unsigned size)
2048 {
2049 VGACommonState *s = opaque;
2050
2051 return vga_mem_readb(s, addr);
2052 }
2053
2054 static void vga_mem_write(void *opaque, hwaddr addr,
2055 uint64_t data, unsigned size)
2056 {
2057 VGACommonState *s = opaque;
2058
2059 vga_mem_writeb(s, addr, data);
2060 }
2061
2062 const MemoryRegionOps vga_mem_ops = {
2063 .read = vga_mem_read,
2064 .write = vga_mem_write,
2065 .endianness = DEVICE_LITTLE_ENDIAN,
2066 .impl = {
2067 .min_access_size = 1,
2068 .max_access_size = 1,
2069 },
2070 };
2071
2072 static int vga_common_post_load(void *opaque, int version_id)
2073 {
2074 VGACommonState *s = opaque;
2075
2076 /* force refresh */
2077 s->graphic_mode = -1;
2078 vbe_update_vgaregs(s);
2079 vga_update_memory_access(s);
2080 return 0;
2081 }
2082
2083 static bool vga_endian_state_needed(void *opaque)
2084 {
2085 VGACommonState *s = opaque;
2086
2087 /*
2088 * Only send the endian state if it's different from the
2089 * default one, thus ensuring backward compatibility for
2090 * migration of the common case
2091 */
2092 return s->default_endian_fb != s->big_endian_fb;
2093 }
2094
2095 static const VMStateDescription vmstate_vga_endian = {
2096 .name = "vga.endian",
2097 .version_id = 1,
2098 .minimum_version_id = 1,
2099 .needed = vga_endian_state_needed,
2100 .fields = (VMStateField[]) {
2101 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2102 VMSTATE_END_OF_LIST()
2103 }
2104 };
2105
2106 const VMStateDescription vmstate_vga_common = {
2107 .name = "vga",
2108 .version_id = 2,
2109 .minimum_version_id = 2,
2110 .post_load = vga_common_post_load,
2111 .fields = (VMStateField[]) {
2112 VMSTATE_UINT32(latch, VGACommonState),
2113 VMSTATE_UINT8(sr_index, VGACommonState),
2114 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2115 VMSTATE_UINT8(gr_index, VGACommonState),
2116 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2117 VMSTATE_UINT8(ar_index, VGACommonState),
2118 VMSTATE_BUFFER(ar, VGACommonState),
2119 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2120 VMSTATE_UINT8(cr_index, VGACommonState),
2121 VMSTATE_BUFFER(cr, VGACommonState),
2122 VMSTATE_UINT8(msr, VGACommonState),
2123 VMSTATE_UINT8(fcr, VGACommonState),
2124 VMSTATE_UINT8(st00, VGACommonState),
2125 VMSTATE_UINT8(st01, VGACommonState),
2126
2127 VMSTATE_UINT8(dac_state, VGACommonState),
2128 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2129 VMSTATE_UINT8(dac_read_index, VGACommonState),
2130 VMSTATE_UINT8(dac_write_index, VGACommonState),
2131 VMSTATE_BUFFER(dac_cache, VGACommonState),
2132 VMSTATE_BUFFER(palette, VGACommonState),
2133
2134 VMSTATE_INT32(bank_offset, VGACommonState),
2135 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2136 VMSTATE_UINT16(vbe_index, VGACommonState),
2137 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2138 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2139 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2140 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2141 VMSTATE_END_OF_LIST()
2142 },
2143 .subsections = (const VMStateDescription*[]) {
2144 &vmstate_vga_endian,
2145 NULL
2146 }
2147 };
2148
2149 static const GraphicHwOps vga_ops = {
2150 .invalidate = vga_invalidate_display,
2151 .gfx_update = vga_update_display,
2152 .text_update = vga_update_text,
2153 };
2154
2155 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2156 {
2157 if (val < vmin) {
2158 return vmin;
2159 }
2160 if (val > vmax) {
2161 return vmax;
2162 }
2163 return val;
2164 }
2165
2166 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2167 {
2168 int i, j, v, b;
2169
2170 for(i = 0;i < 256; i++) {
2171 v = 0;
2172 for(j = 0; j < 8; j++) {
2173 v |= ((i >> j) & 1) << (j * 4);
2174 }
2175 expand4[i] = v;
2176
2177 v = 0;
2178 for(j = 0; j < 4; j++) {
2179 v |= ((i >> (2 * j)) & 3) << (j * 4);
2180 }
2181 expand2[i] = v;
2182 }
2183 for(i = 0; i < 16; i++) {
2184 v = 0;
2185 for(j = 0; j < 4; j++) {
2186 b = ((i >> j) & 1);
2187 v |= b << (2 * j);
2188 v |= b << (2 * j + 1);
2189 }
2190 expand4to8[i] = v;
2191 }
2192
2193 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2194 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2195 s->vram_size = s->vram_size_mb << 20;
2196
2197 if (!s->vbe_size) {
2198 s->vbe_size = s->vram_size;
2199 }
2200 s->vbe_size_mask = s->vbe_size - 1;
2201
2202 s->is_vbe_vmstate = 1;
2203 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2204 &error_fatal);
2205 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2206 xen_register_framebuffer(&s->vram);
2207 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2208 s->get_bpp = vga_get_bpp;
2209 s->get_offsets = vga_get_offsets;
2210 s->get_resolution = vga_get_resolution;
2211 s->hw_ops = &vga_ops;
2212 switch (vga_retrace_method) {
2213 case VGA_RETRACE_DUMB:
2214 s->retrace = vga_dumb_retrace;
2215 s->update_retrace_info = vga_dumb_update_retrace_info;
2216 break;
2217
2218 case VGA_RETRACE_PRECISE:
2219 s->retrace = vga_precise_retrace;
2220 s->update_retrace_info = vga_precise_update_retrace_info;
2221 break;
2222 }
2223
2224 /*
2225 * Set default fb endian based on target, could probably be turned
2226 * into a device attribute set by the machine/platform to remove
2227 * all target endian dependencies from this file.
2228 */
2229 #ifdef TARGET_WORDS_BIGENDIAN
2230 s->default_endian_fb = true;
2231 #else
2232 s->default_endian_fb = false;
2233 #endif
2234 vga_dirty_log_start(s);
2235 }
2236
2237 static const MemoryRegionPortio vga_portio_list[] = {
2238 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2239 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2240 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2241 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2242 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2243 PORTIO_END_OF_LIST(),
2244 };
2245
2246 static const MemoryRegionPortio vbe_portio_list[] = {
2247 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2248 # ifdef TARGET_I386
2249 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2250 # endif
2251 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2252 PORTIO_END_OF_LIST(),
2253 };
2254
2255 /* Used by both ISA and PCI */
2256 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2257 const MemoryRegionPortio **vga_ports,
2258 const MemoryRegionPortio **vbe_ports)
2259 {
2260 MemoryRegion *vga_mem;
2261
2262 *vga_ports = vga_portio_list;
2263 *vbe_ports = vbe_portio_list;
2264
2265 vga_mem = g_malloc(sizeof(*vga_mem));
2266 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2267 "vga-lowmem", 0x20000);
2268 memory_region_set_flush_coalesced(vga_mem);
2269
2270 return vga_mem;
2271 }
2272
2273 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2274 MemoryRegion *address_space_io, bool init_vga_ports)
2275 {
2276 MemoryRegion *vga_io_memory;
2277 const MemoryRegionPortio *vga_ports, *vbe_ports;
2278
2279 qemu_register_reset(vga_reset, s);
2280
2281 s->bank_offset = 0;
2282
2283 s->legacy_address_space = address_space;
2284
2285 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2286 memory_region_add_subregion_overlap(address_space,
2287 0x000a0000,
2288 vga_io_memory,
2289 1);
2290 memory_region_set_coalescing(vga_io_memory);
2291 if (init_vga_ports) {
2292 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2293 portio_list_set_flush_coalesced(&s->vga_port_list);
2294 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2295 }
2296 if (vbe_ports) {
2297 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2298 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2299 }
2300 }
2301
2302 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2303 {
2304 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2305 * so use an alias to avoid double-mapping the same region.
2306 */
2307 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2308 &s->vram, 0, memory_region_size(&s->vram));
2309 /* XXX: use optimized standard vga accesses */
2310 memory_region_add_subregion(system_memory,
2311 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2312 &s->vram_vbe);
2313 s->vbe_mapped = 1;
2314 }
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