vga: fix display update region calculation
[qemu.git] / hw / display / vga.c
1 /*
2 * QEMU VGA Emulator.
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "hw/hw.h"
27 #include "vga.h"
28 #include "ui/console.h"
29 #include "hw/i386/pc.h"
30 #include "hw/pci/pci.h"
31 #include "vga_int.h"
32 #include "ui/pixel_ops.h"
33 #include "qemu/timer.h"
34 #include "hw/xen/xen.h"
35 #include "trace.h"
36
37 //#define DEBUG_VGA_MEM
38 //#define DEBUG_VGA_REG
39
40 /* 16 state changes per vertical frame @60 Hz */
41 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
42
43 /*
44 * Video Graphics Array (VGA)
45 *
46 * Chipset docs for original IBM VGA:
47 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
48 *
49 * FreeVGA site:
50 * http://www.osdever.net/FreeVGA/home.htm
51 *
52 * Standard VGA features and Bochs VBE extensions are implemented.
53 */
54
55 /* force some bits to zero */
56 const uint8_t sr_mask[8] = {
57 0x03,
58 0x3d,
59 0x0f,
60 0x3f,
61 0x0e,
62 0x00,
63 0x00,
64 0xff,
65 };
66
67 const uint8_t gr_mask[16] = {
68 0x0f, /* 0x00 */
69 0x0f, /* 0x01 */
70 0x0f, /* 0x02 */
71 0x1f, /* 0x03 */
72 0x03, /* 0x04 */
73 0x7b, /* 0x05 */
74 0x0f, /* 0x06 */
75 0x0f, /* 0x07 */
76 0xff, /* 0x08 */
77 0x00, /* 0x09 */
78 0x00, /* 0x0a */
79 0x00, /* 0x0b */
80 0x00, /* 0x0c */
81 0x00, /* 0x0d */
82 0x00, /* 0x0e */
83 0x00, /* 0x0f */
84 };
85
86 #define cbswap_32(__x) \
87 ((uint32_t)( \
88 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
89 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
90 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
91 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
92
93 #ifdef HOST_WORDS_BIGENDIAN
94 #define PAT(x) cbswap_32(x)
95 #else
96 #define PAT(x) (x)
97 #endif
98
99 #ifdef HOST_WORDS_BIGENDIAN
100 #define BIG 1
101 #else
102 #define BIG 0
103 #endif
104
105 #ifdef HOST_WORDS_BIGENDIAN
106 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
107 #else
108 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
109 #endif
110
111 static const uint32_t mask16[16] = {
112 PAT(0x00000000),
113 PAT(0x000000ff),
114 PAT(0x0000ff00),
115 PAT(0x0000ffff),
116 PAT(0x00ff0000),
117 PAT(0x00ff00ff),
118 PAT(0x00ffff00),
119 PAT(0x00ffffff),
120 PAT(0xff000000),
121 PAT(0xff0000ff),
122 PAT(0xff00ff00),
123 PAT(0xff00ffff),
124 PAT(0xffff0000),
125 PAT(0xffff00ff),
126 PAT(0xffffff00),
127 PAT(0xffffffff),
128 };
129
130 #undef PAT
131
132 #ifdef HOST_WORDS_BIGENDIAN
133 #define PAT(x) (x)
134 #else
135 #define PAT(x) cbswap_32(x)
136 #endif
137
138 static uint32_t expand4[256];
139 static uint16_t expand2[256];
140 static uint8_t expand4to8[16];
141
142 static void vbe_update_vgaregs(VGACommonState *s);
143
144 static inline bool vbe_enabled(VGACommonState *s)
145 {
146 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
147 }
148
149 static inline uint8_t sr(VGACommonState *s, int idx)
150 {
151 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
152 }
153
154 static void vga_update_memory_access(VGACommonState *s)
155 {
156 hwaddr base, offset, size;
157
158 if (s->legacy_address_space == NULL) {
159 return;
160 }
161
162 if (s->has_chain4_alias) {
163 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
164 object_unparent(OBJECT(&s->chain4_alias));
165 s->has_chain4_alias = false;
166 s->plane_updated = 0xf;
167 }
168 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
169 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
170 offset = 0;
171 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
172 case 0:
173 base = 0xa0000;
174 size = 0x20000;
175 break;
176 case 1:
177 base = 0xa0000;
178 size = 0x10000;
179 offset = s->bank_offset;
180 break;
181 case 2:
182 base = 0xb0000;
183 size = 0x8000;
184 break;
185 case 3:
186 default:
187 base = 0xb8000;
188 size = 0x8000;
189 break;
190 }
191 assert(offset + size <= s->vram_size);
192 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
193 "vga.chain4", &s->vram, offset, size);
194 memory_region_add_subregion_overlap(s->legacy_address_space, base,
195 &s->chain4_alias, 2);
196 s->has_chain4_alias = true;
197 }
198 }
199
200 static void vga_dumb_update_retrace_info(VGACommonState *s)
201 {
202 (void) s;
203 }
204
205 static void vga_precise_update_retrace_info(VGACommonState *s)
206 {
207 int htotal_chars;
208 int hretr_start_char;
209 int hretr_skew_chars;
210 int hretr_end_char;
211
212 int vtotal_lines;
213 int vretr_start_line;
214 int vretr_end_line;
215
216 int dots;
217 #if 0
218 int div2, sldiv2;
219 #endif
220 int clocking_mode;
221 int clock_sel;
222 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
223 int64_t chars_per_sec;
224 struct vga_precise_retrace *r = &s->retrace_info.precise;
225
226 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
227 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
228 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
229 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
230
231 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
232 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
233 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
234 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
235 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
236 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
237 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
238
239 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
240 clock_sel = (s->msr >> 2) & 3;
241 dots = (s->msr & 1) ? 8 : 9;
242
243 chars_per_sec = clk_hz[clock_sel] / dots;
244
245 htotal_chars <<= clocking_mode;
246
247 r->total_chars = vtotal_lines * htotal_chars;
248 if (r->freq) {
249 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
250 } else {
251 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
252 }
253
254 r->vstart = vretr_start_line;
255 r->vend = r->vstart + vretr_end_line + 1;
256
257 r->hstart = hretr_start_char + hretr_skew_chars;
258 r->hend = r->hstart + hretr_end_char + 1;
259 r->htotal = htotal_chars;
260
261 #if 0
262 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
263 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
264 printf (
265 "hz=%f\n"
266 "htotal = %d\n"
267 "hretr_start = %d\n"
268 "hretr_skew = %d\n"
269 "hretr_end = %d\n"
270 "vtotal = %d\n"
271 "vretr_start = %d\n"
272 "vretr_end = %d\n"
273 "div2 = %d sldiv2 = %d\n"
274 "clocking_mode = %d\n"
275 "clock_sel = %d %d\n"
276 "dots = %d\n"
277 "ticks/char = %" PRId64 "\n"
278 "\n",
279 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
280 htotal_chars,
281 hretr_start_char,
282 hretr_skew_chars,
283 hretr_end_char,
284 vtotal_lines,
285 vretr_start_line,
286 vretr_end_line,
287 div2, sldiv2,
288 clocking_mode,
289 clock_sel,
290 clk_hz[clock_sel],
291 dots,
292 r->ticks_per_char
293 );
294 #endif
295 }
296
297 static uint8_t vga_precise_retrace(VGACommonState *s)
298 {
299 struct vga_precise_retrace *r = &s->retrace_info.precise;
300 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
301
302 if (r->total_chars) {
303 int cur_line, cur_line_char, cur_char;
304 int64_t cur_tick;
305
306 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
307
308 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
309 cur_line = cur_char / r->htotal;
310
311 if (cur_line >= r->vstart && cur_line <= r->vend) {
312 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
313 } else {
314 cur_line_char = cur_char % r->htotal;
315 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
316 val |= ST01_DISP_ENABLE;
317 }
318 }
319
320 return val;
321 } else {
322 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
323 }
324 }
325
326 static uint8_t vga_dumb_retrace(VGACommonState *s)
327 {
328 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
329 }
330
331 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
332 {
333 if (s->msr & VGA_MIS_COLOR) {
334 /* Color */
335 return (addr >= 0x3b0 && addr <= 0x3bf);
336 } else {
337 /* Monochrome */
338 return (addr >= 0x3d0 && addr <= 0x3df);
339 }
340 }
341
342 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
343 {
344 VGACommonState *s = opaque;
345 int val, index;
346
347 if (vga_ioport_invalid(s, addr)) {
348 val = 0xff;
349 } else {
350 switch(addr) {
351 case VGA_ATT_W:
352 if (s->ar_flip_flop == 0) {
353 val = s->ar_index;
354 } else {
355 val = 0;
356 }
357 break;
358 case VGA_ATT_R:
359 index = s->ar_index & 0x1f;
360 if (index < VGA_ATT_C) {
361 val = s->ar[index];
362 } else {
363 val = 0;
364 }
365 break;
366 case VGA_MIS_W:
367 val = s->st00;
368 break;
369 case VGA_SEQ_I:
370 val = s->sr_index;
371 break;
372 case VGA_SEQ_D:
373 val = s->sr[s->sr_index];
374 #ifdef DEBUG_VGA_REG
375 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
376 #endif
377 break;
378 case VGA_PEL_IR:
379 val = s->dac_state;
380 break;
381 case VGA_PEL_IW:
382 val = s->dac_write_index;
383 break;
384 case VGA_PEL_D:
385 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
386 if (++s->dac_sub_index == 3) {
387 s->dac_sub_index = 0;
388 s->dac_read_index++;
389 }
390 break;
391 case VGA_FTC_R:
392 val = s->fcr;
393 break;
394 case VGA_MIS_R:
395 val = s->msr;
396 break;
397 case VGA_GFX_I:
398 val = s->gr_index;
399 break;
400 case VGA_GFX_D:
401 val = s->gr[s->gr_index];
402 #ifdef DEBUG_VGA_REG
403 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
404 #endif
405 break;
406 case VGA_CRT_IM:
407 case VGA_CRT_IC:
408 val = s->cr_index;
409 break;
410 case VGA_CRT_DM:
411 case VGA_CRT_DC:
412 val = s->cr[s->cr_index];
413 #ifdef DEBUG_VGA_REG
414 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
415 #endif
416 break;
417 case VGA_IS1_RM:
418 case VGA_IS1_RC:
419 /* just toggle to fool polling */
420 val = s->st01 = s->retrace(s);
421 s->ar_flip_flop = 0;
422 break;
423 default:
424 val = 0x00;
425 break;
426 }
427 }
428 trace_vga_std_read_io(addr, val);
429 return val;
430 }
431
432 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
433 {
434 VGACommonState *s = opaque;
435 int index;
436
437 /* check port range access depending on color/monochrome mode */
438 if (vga_ioport_invalid(s, addr)) {
439 return;
440 }
441 trace_vga_std_write_io(addr, val);
442
443 switch(addr) {
444 case VGA_ATT_W:
445 if (s->ar_flip_flop == 0) {
446 val &= 0x3f;
447 s->ar_index = val;
448 } else {
449 index = s->ar_index & 0x1f;
450 switch(index) {
451 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
452 s->ar[index] = val & 0x3f;
453 break;
454 case VGA_ATC_MODE:
455 s->ar[index] = val & ~0x10;
456 break;
457 case VGA_ATC_OVERSCAN:
458 s->ar[index] = val;
459 break;
460 case VGA_ATC_PLANE_ENABLE:
461 s->ar[index] = val & ~0xc0;
462 break;
463 case VGA_ATC_PEL:
464 s->ar[index] = val & ~0xf0;
465 break;
466 case VGA_ATC_COLOR_PAGE:
467 s->ar[index] = val & ~0xf0;
468 break;
469 default:
470 break;
471 }
472 }
473 s->ar_flip_flop ^= 1;
474 break;
475 case VGA_MIS_W:
476 s->msr = val & ~0x10;
477 s->update_retrace_info(s);
478 break;
479 case VGA_SEQ_I:
480 s->sr_index = val & 7;
481 break;
482 case VGA_SEQ_D:
483 #ifdef DEBUG_VGA_REG
484 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
485 #endif
486 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
487 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
488 s->update_retrace_info(s);
489 }
490 vga_update_memory_access(s);
491 break;
492 case VGA_PEL_IR:
493 s->dac_read_index = val;
494 s->dac_sub_index = 0;
495 s->dac_state = 3;
496 break;
497 case VGA_PEL_IW:
498 s->dac_write_index = val;
499 s->dac_sub_index = 0;
500 s->dac_state = 0;
501 break;
502 case VGA_PEL_D:
503 s->dac_cache[s->dac_sub_index] = val;
504 if (++s->dac_sub_index == 3) {
505 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
506 s->dac_sub_index = 0;
507 s->dac_write_index++;
508 }
509 break;
510 case VGA_GFX_I:
511 s->gr_index = val & 0x0f;
512 break;
513 case VGA_GFX_D:
514 #ifdef DEBUG_VGA_REG
515 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
516 #endif
517 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
518 vbe_update_vgaregs(s);
519 vga_update_memory_access(s);
520 break;
521 case VGA_CRT_IM:
522 case VGA_CRT_IC:
523 s->cr_index = val;
524 break;
525 case VGA_CRT_DM:
526 case VGA_CRT_DC:
527 #ifdef DEBUG_VGA_REG
528 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
529 #endif
530 /* handle CR0-7 protection */
531 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
532 s->cr_index <= VGA_CRTC_OVERFLOW) {
533 /* can always write bit 4 of CR7 */
534 if (s->cr_index == VGA_CRTC_OVERFLOW) {
535 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
536 (val & 0x10);
537 vbe_update_vgaregs(s);
538 }
539 return;
540 }
541 s->cr[s->cr_index] = val;
542 vbe_update_vgaregs(s);
543
544 switch(s->cr_index) {
545 case VGA_CRTC_H_TOTAL:
546 case VGA_CRTC_H_SYNC_START:
547 case VGA_CRTC_H_SYNC_END:
548 case VGA_CRTC_V_TOTAL:
549 case VGA_CRTC_OVERFLOW:
550 case VGA_CRTC_V_SYNC_END:
551 case VGA_CRTC_MODE:
552 s->update_retrace_info(s);
553 break;
554 }
555 break;
556 case VGA_IS1_RM:
557 case VGA_IS1_RC:
558 s->fcr = val & 0x10;
559 break;
560 }
561 }
562
563 /*
564 * Sanity check vbe register writes.
565 *
566 * As we don't have a way to signal errors to the guest in the bochs
567 * dispi interface we'll go adjust the registers to the closest valid
568 * value.
569 */
570 static void vbe_fixup_regs(VGACommonState *s)
571 {
572 uint16_t *r = s->vbe_regs;
573 uint32_t bits, linelength, maxy, offset;
574
575 if (!vbe_enabled(s)) {
576 /* vbe is turned off -- nothing to do */
577 return;
578 }
579
580 /* check depth */
581 switch (r[VBE_DISPI_INDEX_BPP]) {
582 case 4:
583 case 8:
584 case 16:
585 case 24:
586 case 32:
587 bits = r[VBE_DISPI_INDEX_BPP];
588 break;
589 case 15:
590 bits = 16;
591 break;
592 default:
593 bits = r[VBE_DISPI_INDEX_BPP] = 8;
594 break;
595 }
596
597 /* check width */
598 r[VBE_DISPI_INDEX_XRES] &= ~7u;
599 if (r[VBE_DISPI_INDEX_XRES] == 0) {
600 r[VBE_DISPI_INDEX_XRES] = 8;
601 }
602 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
603 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
604 }
605 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
606 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
607 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
608 }
609 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
610 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
611 }
612
613 /* check height */
614 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
615 maxy = s->vbe_size / linelength;
616 if (r[VBE_DISPI_INDEX_YRES] == 0) {
617 r[VBE_DISPI_INDEX_YRES] = 1;
618 }
619 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
620 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
621 }
622 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
623 r[VBE_DISPI_INDEX_YRES] = maxy;
624 }
625
626 /* check offset */
627 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
628 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
629 }
630 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
631 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
632 }
633 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
634 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
635 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
636 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
637 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
638 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
639 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
640 offset = 0;
641 }
642 }
643
644 /* update vga state */
645 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
646 s->vbe_line_offset = linelength;
647 s->vbe_start_addr = offset / 4;
648 }
649
650 /* we initialize the VGA graphic mode */
651 static void vbe_update_vgaregs(VGACommonState *s)
652 {
653 int h, shift_control;
654
655 if (!vbe_enabled(s)) {
656 /* vbe is turned off -- nothing to do */
657 return;
658 }
659
660 /* graphic mode + memory map 1 */
661 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
662 VGA_GR06_GRAPHICS_MODE;
663 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
664 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
665 /* width */
666 s->cr[VGA_CRTC_H_DISP] =
667 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
668 /* height (only meaningful if < 1024) */
669 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
670 s->cr[VGA_CRTC_V_DISP_END] = h;
671 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
672 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
673 /* line compare to 1023 */
674 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
675 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
676 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
677
678 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
679 shift_control = 0;
680 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
681 } else {
682 shift_control = 2;
683 /* set chain 4 mode */
684 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
685 /* activate all planes */
686 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
687 }
688 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
689 (shift_control << 5);
690 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
691 }
692
693 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
694 {
695 VGACommonState *s = opaque;
696 return s->vbe_index;
697 }
698
699 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
700 {
701 VGACommonState *s = opaque;
702 uint32_t val;
703
704 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
705 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
706 switch(s->vbe_index) {
707 /* XXX: do not hardcode ? */
708 case VBE_DISPI_INDEX_XRES:
709 val = VBE_DISPI_MAX_XRES;
710 break;
711 case VBE_DISPI_INDEX_YRES:
712 val = VBE_DISPI_MAX_YRES;
713 break;
714 case VBE_DISPI_INDEX_BPP:
715 val = VBE_DISPI_MAX_BPP;
716 break;
717 default:
718 val = s->vbe_regs[s->vbe_index];
719 break;
720 }
721 } else {
722 val = s->vbe_regs[s->vbe_index];
723 }
724 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
725 val = s->vbe_size / (64 * 1024);
726 } else {
727 val = 0;
728 }
729 trace_vga_vbe_read(s->vbe_index, val);
730 return val;
731 }
732
733 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
734 {
735 VGACommonState *s = opaque;
736 s->vbe_index = val;
737 }
738
739 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
740 {
741 VGACommonState *s = opaque;
742
743 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
744 trace_vga_vbe_write(s->vbe_index, val);
745 switch(s->vbe_index) {
746 case VBE_DISPI_INDEX_ID:
747 if (val == VBE_DISPI_ID0 ||
748 val == VBE_DISPI_ID1 ||
749 val == VBE_DISPI_ID2 ||
750 val == VBE_DISPI_ID3 ||
751 val == VBE_DISPI_ID4) {
752 s->vbe_regs[s->vbe_index] = val;
753 }
754 break;
755 case VBE_DISPI_INDEX_XRES:
756 case VBE_DISPI_INDEX_YRES:
757 case VBE_DISPI_INDEX_BPP:
758 case VBE_DISPI_INDEX_VIRT_WIDTH:
759 case VBE_DISPI_INDEX_X_OFFSET:
760 case VBE_DISPI_INDEX_Y_OFFSET:
761 s->vbe_regs[s->vbe_index] = val;
762 vbe_fixup_regs(s);
763 vbe_update_vgaregs(s);
764 break;
765 case VBE_DISPI_INDEX_BANK:
766 val &= s->vbe_bank_mask;
767 s->vbe_regs[s->vbe_index] = val;
768 s->bank_offset = (val << 16);
769 vga_update_memory_access(s);
770 break;
771 case VBE_DISPI_INDEX_ENABLE:
772 if ((val & VBE_DISPI_ENABLED) &&
773 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
774
775 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
776 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
777 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
778 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
779 vbe_fixup_regs(s);
780 vbe_update_vgaregs(s);
781
782 /* clear the screen */
783 if (!(val & VBE_DISPI_NOCLEARMEM)) {
784 memset(s->vram_ptr, 0,
785 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
786 }
787 } else {
788 s->bank_offset = 0;
789 }
790 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
791 s->vbe_regs[s->vbe_index] = val;
792 vga_update_memory_access(s);
793 break;
794 default:
795 break;
796 }
797 }
798 }
799
800 /* called for accesses between 0xa0000 and 0xc0000 */
801 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
802 {
803 int memory_map_mode, plane;
804 uint32_t ret;
805
806 /* convert to VGA memory offset */
807 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
808 addr &= 0x1ffff;
809 switch(memory_map_mode) {
810 case 0:
811 break;
812 case 1:
813 if (addr >= 0x10000)
814 return 0xff;
815 addr += s->bank_offset;
816 break;
817 case 2:
818 addr -= 0x10000;
819 if (addr >= 0x8000)
820 return 0xff;
821 break;
822 default:
823 case 3:
824 addr -= 0x18000;
825 if (addr >= 0x8000)
826 return 0xff;
827 break;
828 }
829
830 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
831 /* chain 4 mode : simplest access */
832 assert(addr < s->vram_size);
833 ret = s->vram_ptr[addr];
834 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
835 /* odd/even mode (aka text mode mapping) */
836 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
837 addr = ((addr & ~1) << 1) | plane;
838 if (addr >= s->vram_size) {
839 return 0xff;
840 }
841 ret = s->vram_ptr[addr];
842 } else {
843 /* standard VGA latched access */
844 if (addr * sizeof(uint32_t) >= s->vram_size) {
845 return 0xff;
846 }
847 s->latch = ((uint32_t *)s->vram_ptr)[addr];
848
849 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
850 /* read mode 0 */
851 plane = s->gr[VGA_GFX_PLANE_READ];
852 ret = GET_PLANE(s->latch, plane);
853 } else {
854 /* read mode 1 */
855 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
856 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
857 ret |= ret >> 16;
858 ret |= ret >> 8;
859 ret = (~ret) & 0xff;
860 }
861 }
862 return ret;
863 }
864
865 /* called for accesses between 0xa0000 and 0xc0000 */
866 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
867 {
868 int memory_map_mode, plane, write_mode, b, func_select, mask;
869 uint32_t write_mask, bit_mask, set_mask;
870
871 #ifdef DEBUG_VGA_MEM
872 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
873 #endif
874 /* convert to VGA memory offset */
875 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
876 addr &= 0x1ffff;
877 switch(memory_map_mode) {
878 case 0:
879 break;
880 case 1:
881 if (addr >= 0x10000)
882 return;
883 addr += s->bank_offset;
884 break;
885 case 2:
886 addr -= 0x10000;
887 if (addr >= 0x8000)
888 return;
889 break;
890 default:
891 case 3:
892 addr -= 0x18000;
893 if (addr >= 0x8000)
894 return;
895 break;
896 }
897
898 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
899 /* chain 4 mode : simplest access */
900 plane = addr & 3;
901 mask = (1 << plane);
902 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
903 assert(addr < s->vram_size);
904 s->vram_ptr[addr] = val;
905 #ifdef DEBUG_VGA_MEM
906 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
907 #endif
908 s->plane_updated |= mask; /* only used to detect font change */
909 memory_region_set_dirty(&s->vram, addr, 1);
910 }
911 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
912 /* odd/even mode (aka text mode mapping) */
913 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
914 mask = (1 << plane);
915 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
916 addr = ((addr & ~1) << 1) | plane;
917 if (addr >= s->vram_size) {
918 return;
919 }
920 s->vram_ptr[addr] = val;
921 #ifdef DEBUG_VGA_MEM
922 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
923 #endif
924 s->plane_updated |= mask; /* only used to detect font change */
925 memory_region_set_dirty(&s->vram, addr, 1);
926 }
927 } else {
928 /* standard VGA latched access */
929 write_mode = s->gr[VGA_GFX_MODE] & 3;
930 switch(write_mode) {
931 default:
932 case 0:
933 /* rotate */
934 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
935 val = ((val >> b) | (val << (8 - b))) & 0xff;
936 val |= val << 8;
937 val |= val << 16;
938
939 /* apply set/reset mask */
940 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
941 val = (val & ~set_mask) |
942 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
943 bit_mask = s->gr[VGA_GFX_BIT_MASK];
944 break;
945 case 1:
946 val = s->latch;
947 goto do_write;
948 case 2:
949 val = mask16[val & 0x0f];
950 bit_mask = s->gr[VGA_GFX_BIT_MASK];
951 break;
952 case 3:
953 /* rotate */
954 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
955 val = (val >> b) | (val << (8 - b));
956
957 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
958 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
959 break;
960 }
961
962 /* apply logical operation */
963 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
964 switch(func_select) {
965 case 0:
966 default:
967 /* nothing to do */
968 break;
969 case 1:
970 /* and */
971 val &= s->latch;
972 break;
973 case 2:
974 /* or */
975 val |= s->latch;
976 break;
977 case 3:
978 /* xor */
979 val ^= s->latch;
980 break;
981 }
982
983 /* apply bit mask */
984 bit_mask |= bit_mask << 8;
985 bit_mask |= bit_mask << 16;
986 val = (val & bit_mask) | (s->latch & ~bit_mask);
987
988 do_write:
989 /* mask data according to sr[2] */
990 mask = sr(s, VGA_SEQ_PLANE_WRITE);
991 s->plane_updated |= mask; /* only used to detect font change */
992 write_mask = mask16[mask];
993 if (addr * sizeof(uint32_t) >= s->vram_size) {
994 return;
995 }
996 ((uint32_t *)s->vram_ptr)[addr] =
997 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
998 (val & write_mask);
999 #ifdef DEBUG_VGA_MEM
1000 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1001 addr * 4, write_mask, val);
1002 #endif
1003 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1004 }
1005 }
1006
1007 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1008 const uint8_t *s, int width);
1009
1010 #include "vga-helpers.h"
1011
1012 /* return true if the palette was modified */
1013 static int update_palette16(VGACommonState *s)
1014 {
1015 int full_update, i;
1016 uint32_t v, col, *palette;
1017
1018 full_update = 0;
1019 palette = s->last_palette;
1020 for(i = 0; i < 16; i++) {
1021 v = s->ar[i];
1022 if (s->ar[VGA_ATC_MODE] & 0x80) {
1023 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1024 } else {
1025 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1026 }
1027 v = v * 3;
1028 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1029 c6_to_8(s->palette[v + 1]),
1030 c6_to_8(s->palette[v + 2]));
1031 if (col != palette[i]) {
1032 full_update = 1;
1033 palette[i] = col;
1034 }
1035 }
1036 return full_update;
1037 }
1038
1039 /* return true if the palette was modified */
1040 static int update_palette256(VGACommonState *s)
1041 {
1042 int full_update, i;
1043 uint32_t v, col, *palette;
1044
1045 full_update = 0;
1046 palette = s->last_palette;
1047 v = 0;
1048 for(i = 0; i < 256; i++) {
1049 if (s->dac_8bit) {
1050 col = rgb_to_pixel32(s->palette[v],
1051 s->palette[v + 1],
1052 s->palette[v + 2]);
1053 } else {
1054 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1055 c6_to_8(s->palette[v + 1]),
1056 c6_to_8(s->palette[v + 2]));
1057 }
1058 if (col != palette[i]) {
1059 full_update = 1;
1060 palette[i] = col;
1061 }
1062 v += 3;
1063 }
1064 return full_update;
1065 }
1066
1067 static void vga_get_offsets(VGACommonState *s,
1068 uint32_t *pline_offset,
1069 uint32_t *pstart_addr,
1070 uint32_t *pline_compare)
1071 {
1072 uint32_t start_addr, line_offset, line_compare;
1073
1074 if (vbe_enabled(s)) {
1075 line_offset = s->vbe_line_offset;
1076 start_addr = s->vbe_start_addr;
1077 line_compare = 65535;
1078 } else {
1079 /* compute line_offset in bytes */
1080 line_offset = s->cr[VGA_CRTC_OFFSET];
1081 line_offset <<= 3;
1082
1083 /* starting address */
1084 start_addr = s->cr[VGA_CRTC_START_LO] |
1085 (s->cr[VGA_CRTC_START_HI] << 8);
1086
1087 /* line compare */
1088 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1089 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1090 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1091 }
1092 *pline_offset = line_offset;
1093 *pstart_addr = start_addr;
1094 *pline_compare = line_compare;
1095 }
1096
1097 /* update start_addr and line_offset. Return TRUE if modified */
1098 static int update_basic_params(VGACommonState *s)
1099 {
1100 int full_update;
1101 uint32_t start_addr, line_offset, line_compare;
1102
1103 full_update = 0;
1104
1105 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1106
1107 if (line_offset != s->line_offset ||
1108 start_addr != s->start_addr ||
1109 line_compare != s->line_compare) {
1110 s->line_offset = line_offset;
1111 s->start_addr = start_addr;
1112 s->line_compare = line_compare;
1113 full_update = 1;
1114 }
1115 return full_update;
1116 }
1117
1118
1119 static const uint8_t cursor_glyph[32 * 4] = {
1120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1126 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1128 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1129 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1130 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1135 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1136 };
1137
1138 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1139 int *pcwidth, int *pcheight)
1140 {
1141 int width, cwidth, height, cheight;
1142
1143 /* total width & height */
1144 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1145 cwidth = 8;
1146 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1147 cwidth = 9;
1148 }
1149 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1150 cwidth = 16; /* NOTE: no 18 pixel wide */
1151 }
1152 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1153 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1154 /* ugly hack for CGA 160x100x16 - explain me the logic */
1155 height = 100;
1156 } else {
1157 height = s->cr[VGA_CRTC_V_DISP_END] |
1158 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1159 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1160 height = (height + 1) / cheight;
1161 }
1162
1163 *pwidth = width;
1164 *pheight = height;
1165 *pcwidth = cwidth;
1166 *pcheight = cheight;
1167 }
1168
1169 /*
1170 * Text mode update
1171 * Missing:
1172 * - double scan
1173 * - double width
1174 * - underline
1175 * - flashing
1176 */
1177 static void vga_draw_text(VGACommonState *s, int full_update)
1178 {
1179 DisplaySurface *surface = qemu_console_surface(s->con);
1180 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1181 int cx_min, cx_max, linesize, x_incr, line, line1;
1182 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1183 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1184 const uint8_t *font_ptr, *font_base[2];
1185 int dup9, line_offset;
1186 uint32_t *palette;
1187 uint32_t *ch_attr_ptr;
1188 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1189
1190 /* compute font data address (in plane 2) */
1191 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1192 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1193 if (offset != s->font_offsets[0]) {
1194 s->font_offsets[0] = offset;
1195 full_update = 1;
1196 }
1197 font_base[0] = s->vram_ptr + offset;
1198
1199 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1200 font_base[1] = s->vram_ptr + offset;
1201 if (offset != s->font_offsets[1]) {
1202 s->font_offsets[1] = offset;
1203 full_update = 1;
1204 }
1205 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1206 /* if the plane 2 was modified since the last display, it
1207 indicates the font may have been modified */
1208 s->plane_updated = 0;
1209 full_update = 1;
1210 }
1211 full_update |= update_basic_params(s);
1212
1213 line_offset = s->line_offset;
1214
1215 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1216 if ((height * width) <= 1) {
1217 /* better than nothing: exit if transient size is too small */
1218 return;
1219 }
1220 if ((height * width) > CH_ATTR_SIZE) {
1221 /* better than nothing: exit if transient size is too big */
1222 return;
1223 }
1224
1225 if (width != s->last_width || height != s->last_height ||
1226 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1227 s->last_scr_width = width * cw;
1228 s->last_scr_height = height * cheight;
1229 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1230 surface = qemu_console_surface(s->con);
1231 dpy_text_resize(s->con, width, height);
1232 s->last_depth = 0;
1233 s->last_width = width;
1234 s->last_height = height;
1235 s->last_ch = cheight;
1236 s->last_cw = cw;
1237 full_update = 1;
1238 }
1239 full_update |= update_palette16(s);
1240 palette = s->last_palette;
1241 x_incr = cw * surface_bytes_per_pixel(surface);
1242
1243 if (full_update) {
1244 s->full_update_text = 1;
1245 }
1246 if (s->full_update_gfx) {
1247 s->full_update_gfx = 0;
1248 full_update |= 1;
1249 }
1250
1251 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1252 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1253 if (cursor_offset != s->cursor_offset ||
1254 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1255 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1256 /* if the cursor position changed, we update the old and new
1257 chars */
1258 if (s->cursor_offset < CH_ATTR_SIZE)
1259 s->last_ch_attr[s->cursor_offset] = -1;
1260 if (cursor_offset < CH_ATTR_SIZE)
1261 s->last_ch_attr[cursor_offset] = -1;
1262 s->cursor_offset = cursor_offset;
1263 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1264 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1265 }
1266 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1267 if (now >= s->cursor_blink_time) {
1268 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1269 s->cursor_visible_phase = !s->cursor_visible_phase;
1270 }
1271
1272 dest = surface_data(surface);
1273 linesize = surface_stride(surface);
1274 ch_attr_ptr = s->last_ch_attr;
1275 line = 0;
1276 offset = s->start_addr * 4;
1277 for(cy = 0; cy < height; cy++) {
1278 d1 = dest;
1279 src = s->vram_ptr + offset;
1280 cx_min = width;
1281 cx_max = -1;
1282 for(cx = 0; cx < width; cx++) {
1283 ch_attr = *(uint16_t *)src;
1284 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1285 if (cx < cx_min)
1286 cx_min = cx;
1287 if (cx > cx_max)
1288 cx_max = cx;
1289 *ch_attr_ptr = ch_attr;
1290 #ifdef HOST_WORDS_BIGENDIAN
1291 ch = ch_attr >> 8;
1292 cattr = ch_attr & 0xff;
1293 #else
1294 ch = ch_attr & 0xff;
1295 cattr = ch_attr >> 8;
1296 #endif
1297 font_ptr = font_base[(cattr >> 3) & 1];
1298 font_ptr += 32 * 4 * ch;
1299 bgcol = palette[cattr >> 4];
1300 fgcol = palette[cattr & 0x0f];
1301 if (cw == 16) {
1302 vga_draw_glyph16(d1, linesize,
1303 font_ptr, cheight, fgcol, bgcol);
1304 } else if (cw != 9) {
1305 vga_draw_glyph8(d1, linesize,
1306 font_ptr, cheight, fgcol, bgcol);
1307 } else {
1308 dup9 = 0;
1309 if (ch >= 0xb0 && ch <= 0xdf &&
1310 (s->ar[VGA_ATC_MODE] & 0x04)) {
1311 dup9 = 1;
1312 }
1313 vga_draw_glyph9(d1, linesize,
1314 font_ptr, cheight, fgcol, bgcol, dup9);
1315 }
1316 if (src == cursor_ptr &&
1317 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1318 s->cursor_visible_phase) {
1319 int line_start, line_last, h;
1320 /* draw the cursor */
1321 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1322 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1323 /* XXX: check that */
1324 if (line_last > cheight - 1)
1325 line_last = cheight - 1;
1326 if (line_last >= line_start && line_start < cheight) {
1327 h = line_last - line_start + 1;
1328 d = d1 + linesize * line_start;
1329 if (cw == 16) {
1330 vga_draw_glyph16(d, linesize,
1331 cursor_glyph, h, fgcol, bgcol);
1332 } else if (cw != 9) {
1333 vga_draw_glyph8(d, linesize,
1334 cursor_glyph, h, fgcol, bgcol);
1335 } else {
1336 vga_draw_glyph9(d, linesize,
1337 cursor_glyph, h, fgcol, bgcol, 1);
1338 }
1339 }
1340 }
1341 }
1342 d1 += x_incr;
1343 src += 4;
1344 ch_attr_ptr++;
1345 }
1346 if (cx_max != -1) {
1347 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1348 (cx_max - cx_min + 1) * cw, cheight);
1349 }
1350 dest += linesize * cheight;
1351 line1 = line + cheight;
1352 offset += line_offset;
1353 if (line < s->line_compare && line1 >= s->line_compare) {
1354 offset = 0;
1355 }
1356 line = line1;
1357 }
1358 }
1359
1360 enum {
1361 VGA_DRAW_LINE2,
1362 VGA_DRAW_LINE2D2,
1363 VGA_DRAW_LINE4,
1364 VGA_DRAW_LINE4D2,
1365 VGA_DRAW_LINE8D2,
1366 VGA_DRAW_LINE8,
1367 VGA_DRAW_LINE15_LE,
1368 VGA_DRAW_LINE16_LE,
1369 VGA_DRAW_LINE24_LE,
1370 VGA_DRAW_LINE32_LE,
1371 VGA_DRAW_LINE15_BE,
1372 VGA_DRAW_LINE16_BE,
1373 VGA_DRAW_LINE24_BE,
1374 VGA_DRAW_LINE32_BE,
1375 VGA_DRAW_LINE_NB,
1376 };
1377
1378 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1379 vga_draw_line2,
1380 vga_draw_line2d2,
1381 vga_draw_line4,
1382 vga_draw_line4d2,
1383 vga_draw_line8d2,
1384 vga_draw_line8,
1385 vga_draw_line15_le,
1386 vga_draw_line16_le,
1387 vga_draw_line24_le,
1388 vga_draw_line32_le,
1389 vga_draw_line15_be,
1390 vga_draw_line16_be,
1391 vga_draw_line24_be,
1392 vga_draw_line32_be,
1393 };
1394
1395 static int vga_get_bpp(VGACommonState *s)
1396 {
1397 int ret;
1398
1399 if (vbe_enabled(s)) {
1400 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1401 } else {
1402 ret = 0;
1403 }
1404 return ret;
1405 }
1406
1407 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1408 {
1409 int width, height;
1410
1411 if (vbe_enabled(s)) {
1412 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1413 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1414 } else {
1415 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1416 height = s->cr[VGA_CRTC_V_DISP_END] |
1417 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1418 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1419 height = (height + 1);
1420 }
1421 *pwidth = width;
1422 *pheight = height;
1423 }
1424
1425 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1426 {
1427 int y;
1428 if (y1 >= VGA_MAX_HEIGHT)
1429 return;
1430 if (y2 >= VGA_MAX_HEIGHT)
1431 y2 = VGA_MAX_HEIGHT;
1432 for(y = y1; y < y2; y++) {
1433 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1434 }
1435 }
1436
1437 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1438 {
1439 if (y >= VGA_MAX_HEIGHT) {
1440 return false;
1441 }
1442 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1443 }
1444
1445 void vga_sync_dirty_bitmap(VGACommonState *s)
1446 {
1447 memory_region_sync_dirty_bitmap(&s->vram);
1448 }
1449
1450 void vga_dirty_log_start(VGACommonState *s)
1451 {
1452 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1453 }
1454
1455 void vga_dirty_log_stop(VGACommonState *s)
1456 {
1457 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1458 }
1459
1460 /*
1461 * graphic modes
1462 */
1463 static void vga_draw_graphic(VGACommonState *s, int full_update)
1464 {
1465 DisplaySurface *surface = qemu_console_surface(s->con);
1466 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1467 int width, height, shift_control, line_offset, bwidth, bits;
1468 ram_addr_t page0, page1;
1469 DirtyBitmapSnapshot *snap = NULL;
1470 int disp_width, multi_scan, multi_run;
1471 uint8_t *d;
1472 uint32_t v, addr1, addr;
1473 vga_draw_line_func *vga_draw_line = NULL;
1474 bool share_surface;
1475 pixman_format_code_t format;
1476 #ifdef HOST_WORDS_BIGENDIAN
1477 bool byteswap = !s->big_endian_fb;
1478 #else
1479 bool byteswap = s->big_endian_fb;
1480 #endif
1481
1482 full_update |= update_basic_params(s);
1483
1484 s->get_resolution(s, &width, &height);
1485 disp_width = width;
1486
1487 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1488 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1489 if (shift_control != 1) {
1490 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1491 - 1;
1492 } else {
1493 /* in CGA modes, multi_scan is ignored */
1494 /* XXX: is it correct ? */
1495 multi_scan = double_scan;
1496 }
1497 multi_run = multi_scan;
1498 if (shift_control != s->shift_control ||
1499 double_scan != s->double_scan) {
1500 full_update = 1;
1501 s->shift_control = shift_control;
1502 s->double_scan = double_scan;
1503 }
1504
1505 if (shift_control == 0) {
1506 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1507 disp_width <<= 1;
1508 }
1509 } else if (shift_control == 1) {
1510 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1511 disp_width <<= 1;
1512 }
1513 }
1514
1515 depth = s->get_bpp(s);
1516
1517 /*
1518 * Check whether we can share the surface with the backend
1519 * or whether we need a shadow surface. We share native
1520 * endian surfaces for 15bpp and above and byteswapped
1521 * surfaces for 24bpp and above.
1522 */
1523 format = qemu_default_pixman_format(depth, !byteswap);
1524 if (format) {
1525 share_surface = dpy_gfx_check_format(s->con, format)
1526 && !s->force_shadow;
1527 } else {
1528 share_surface = false;
1529 }
1530 if (s->line_offset != s->last_line_offset ||
1531 disp_width != s->last_width ||
1532 height != s->last_height ||
1533 s->last_depth != depth ||
1534 s->last_byteswap != byteswap ||
1535 share_surface != is_buffer_shared(surface)) {
1536 if (share_surface) {
1537 surface = qemu_create_displaysurface_from(disp_width,
1538 height, format, s->line_offset,
1539 s->vram_ptr + (s->start_addr * 4));
1540 dpy_gfx_replace_surface(s->con, surface);
1541 } else {
1542 qemu_console_resize(s->con, disp_width, height);
1543 surface = qemu_console_surface(s->con);
1544 }
1545 s->last_scr_width = disp_width;
1546 s->last_scr_height = height;
1547 s->last_width = disp_width;
1548 s->last_height = height;
1549 s->last_line_offset = s->line_offset;
1550 s->last_depth = depth;
1551 s->last_byteswap = byteswap;
1552 full_update = 1;
1553 } else if (is_buffer_shared(surface) &&
1554 (full_update || surface_data(surface) != s->vram_ptr
1555 + (s->start_addr * 4))) {
1556 pixman_format_code_t format =
1557 qemu_default_pixman_format(depth, !byteswap);
1558 surface = qemu_create_displaysurface_from(disp_width,
1559 height, format, s->line_offset,
1560 s->vram_ptr + (s->start_addr * 4));
1561 dpy_gfx_replace_surface(s->con, surface);
1562 }
1563
1564 if (shift_control == 0) {
1565 full_update |= update_palette16(s);
1566 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1567 v = VGA_DRAW_LINE4D2;
1568 } else {
1569 v = VGA_DRAW_LINE4;
1570 }
1571 bits = 4;
1572 } else if (shift_control == 1) {
1573 full_update |= update_palette16(s);
1574 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1575 v = VGA_DRAW_LINE2D2;
1576 } else {
1577 v = VGA_DRAW_LINE2;
1578 }
1579 bits = 4;
1580 } else {
1581 switch(s->get_bpp(s)) {
1582 default:
1583 case 0:
1584 full_update |= update_palette256(s);
1585 v = VGA_DRAW_LINE8D2;
1586 bits = 4;
1587 break;
1588 case 8:
1589 full_update |= update_palette256(s);
1590 v = VGA_DRAW_LINE8;
1591 bits = 8;
1592 break;
1593 case 15:
1594 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1595 bits = 16;
1596 break;
1597 case 16:
1598 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1599 bits = 16;
1600 break;
1601 case 24:
1602 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1603 bits = 24;
1604 break;
1605 case 32:
1606 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1607 bits = 32;
1608 break;
1609 }
1610 }
1611 vga_draw_line = vga_draw_line_table[v];
1612
1613 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1614 s->cursor_invalidate(s);
1615 }
1616
1617 line_offset = s->line_offset;
1618 #if 0
1619 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",
1620 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1621 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1622 #endif
1623 addr1 = (s->start_addr * 4);
1624 bwidth = (width * bits + 7) / 8;
1625 y_start = -1;
1626 d = surface_data(surface);
1627 linesize = surface_stride(surface);
1628 y1 = 0;
1629
1630 if (!full_update) {
1631 vga_sync_dirty_bitmap(s);
1632 snap = memory_region_snapshot_and_clear_dirty(&s->vram, addr1,
1633 line_offset * height,
1634 DIRTY_MEMORY_VGA);
1635 }
1636
1637 for(y = 0; y < height; y++) {
1638 addr = addr1;
1639 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1640 int shift;
1641 /* CGA compatibility handling */
1642 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1643 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1644 }
1645 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1646 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1647 }
1648 update = full_update;
1649 page0 = addr;
1650 page1 = addr + bwidth - 1;
1651 if (full_update) {
1652 update = 1;
1653 } else {
1654 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1655 page0, page1 - page0);
1656 }
1657 /* explicit invalidation for the hardware cursor (cirrus only) */
1658 update |= vga_scanline_invalidated(s, y);
1659 if (update) {
1660 if (y_start < 0)
1661 y_start = y;
1662 if (!(is_buffer_shared(surface))) {
1663 vga_draw_line(s, d, s->vram_ptr + addr, width);
1664 if (s->cursor_draw_line)
1665 s->cursor_draw_line(s, d, y);
1666 }
1667 } else {
1668 if (y_start >= 0) {
1669 /* flush to display */
1670 dpy_gfx_update(s->con, 0, y_start,
1671 disp_width, y - y_start);
1672 y_start = -1;
1673 }
1674 }
1675 if (!multi_run) {
1676 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1677 if ((y1 & mask) == mask)
1678 addr1 += line_offset;
1679 y1++;
1680 multi_run = multi_scan;
1681 } else {
1682 multi_run--;
1683 }
1684 /* line compare acts on the displayed lines */
1685 if (y == s->line_compare)
1686 addr1 = 0;
1687 d += linesize;
1688 }
1689 if (y_start >= 0) {
1690 /* flush to display */
1691 dpy_gfx_update(s->con, 0, y_start,
1692 disp_width, y - y_start);
1693 }
1694 g_free(snap);
1695 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1696 }
1697
1698 static void vga_draw_blank(VGACommonState *s, int full_update)
1699 {
1700 DisplaySurface *surface = qemu_console_surface(s->con);
1701 int i, w;
1702 uint8_t *d;
1703
1704 if (!full_update)
1705 return;
1706 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1707 return;
1708
1709 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1710 d = surface_data(surface);
1711 for(i = 0; i < s->last_scr_height; i++) {
1712 memset(d, 0, w);
1713 d += surface_stride(surface);
1714 }
1715 dpy_gfx_update(s->con, 0, 0,
1716 s->last_scr_width, s->last_scr_height);
1717 }
1718
1719 #define GMODE_TEXT 0
1720 #define GMODE_GRAPH 1
1721 #define GMODE_BLANK 2
1722
1723 static void vga_update_display(void *opaque)
1724 {
1725 VGACommonState *s = opaque;
1726 DisplaySurface *surface = qemu_console_surface(s->con);
1727 int full_update, graphic_mode;
1728
1729 qemu_flush_coalesced_mmio_buffer();
1730
1731 if (surface_bits_per_pixel(surface) == 0) {
1732 /* nothing to do */
1733 } else {
1734 full_update = 0;
1735 if (!(s->ar_index & 0x20)) {
1736 graphic_mode = GMODE_BLANK;
1737 } else {
1738 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1739 }
1740 if (graphic_mode != s->graphic_mode) {
1741 s->graphic_mode = graphic_mode;
1742 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1743 full_update = 1;
1744 }
1745 switch(graphic_mode) {
1746 case GMODE_TEXT:
1747 vga_draw_text(s, full_update);
1748 break;
1749 case GMODE_GRAPH:
1750 vga_draw_graphic(s, full_update);
1751 break;
1752 case GMODE_BLANK:
1753 default:
1754 vga_draw_blank(s, full_update);
1755 break;
1756 }
1757 }
1758 }
1759
1760 /* force a full display refresh */
1761 static void vga_invalidate_display(void *opaque)
1762 {
1763 VGACommonState *s = opaque;
1764
1765 s->last_width = -1;
1766 s->last_height = -1;
1767 }
1768
1769 void vga_common_reset(VGACommonState *s)
1770 {
1771 s->sr_index = 0;
1772 memset(s->sr, '\0', sizeof(s->sr));
1773 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1774 s->gr_index = 0;
1775 memset(s->gr, '\0', sizeof(s->gr));
1776 s->ar_index = 0;
1777 memset(s->ar, '\0', sizeof(s->ar));
1778 s->ar_flip_flop = 0;
1779 s->cr_index = 0;
1780 memset(s->cr, '\0', sizeof(s->cr));
1781 s->msr = 0;
1782 s->fcr = 0;
1783 s->st00 = 0;
1784 s->st01 = 0;
1785 s->dac_state = 0;
1786 s->dac_sub_index = 0;
1787 s->dac_read_index = 0;
1788 s->dac_write_index = 0;
1789 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1790 s->dac_8bit = 0;
1791 memset(s->palette, '\0', sizeof(s->palette));
1792 s->bank_offset = 0;
1793 s->vbe_index = 0;
1794 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1795 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1796 s->vbe_start_addr = 0;
1797 s->vbe_line_offset = 0;
1798 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1799 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1800 s->graphic_mode = -1; /* force full update */
1801 s->shift_control = 0;
1802 s->double_scan = 0;
1803 s->line_offset = 0;
1804 s->line_compare = 0;
1805 s->start_addr = 0;
1806 s->plane_updated = 0;
1807 s->last_cw = 0;
1808 s->last_ch = 0;
1809 s->last_width = 0;
1810 s->last_height = 0;
1811 s->last_scr_width = 0;
1812 s->last_scr_height = 0;
1813 s->cursor_start = 0;
1814 s->cursor_end = 0;
1815 s->cursor_offset = 0;
1816 s->big_endian_fb = s->default_endian_fb;
1817 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1818 memset(s->last_palette, '\0', sizeof(s->last_palette));
1819 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1820 switch (vga_retrace_method) {
1821 case VGA_RETRACE_DUMB:
1822 break;
1823 case VGA_RETRACE_PRECISE:
1824 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1825 break;
1826 }
1827 vga_update_memory_access(s);
1828 }
1829
1830 static void vga_reset(void *opaque)
1831 {
1832 VGACommonState *s = opaque;
1833 vga_common_reset(s);
1834 }
1835
1836 #define TEXTMODE_X(x) ((x) % width)
1837 #define TEXTMODE_Y(x) ((x) / width)
1838 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1839 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1840 /* relay text rendering to the display driver
1841 * instead of doing a full vga_update_display() */
1842 static void vga_update_text(void *opaque, console_ch_t *chardata)
1843 {
1844 VGACommonState *s = opaque;
1845 int graphic_mode, i, cursor_offset, cursor_visible;
1846 int cw, cheight, width, height, size, c_min, c_max;
1847 uint32_t *src;
1848 console_ch_t *dst, val;
1849 char msg_buffer[80];
1850 int full_update = 0;
1851
1852 qemu_flush_coalesced_mmio_buffer();
1853
1854 if (!(s->ar_index & 0x20)) {
1855 graphic_mode = GMODE_BLANK;
1856 } else {
1857 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1858 }
1859 if (graphic_mode != s->graphic_mode) {
1860 s->graphic_mode = graphic_mode;
1861 full_update = 1;
1862 }
1863 if (s->last_width == -1) {
1864 s->last_width = 0;
1865 full_update = 1;
1866 }
1867
1868 switch (graphic_mode) {
1869 case GMODE_TEXT:
1870 /* TODO: update palette */
1871 full_update |= update_basic_params(s);
1872
1873 /* total width & height */
1874 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1875 cw = 8;
1876 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1877 cw = 9;
1878 }
1879 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1880 cw = 16; /* NOTE: no 18 pixel wide */
1881 }
1882 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1883 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1884 /* ugly hack for CGA 160x100x16 - explain me the logic */
1885 height = 100;
1886 } else {
1887 height = s->cr[VGA_CRTC_V_DISP_END] |
1888 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1889 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1890 height = (height + 1) / cheight;
1891 }
1892
1893 size = (height * width);
1894 if (size > CH_ATTR_SIZE) {
1895 if (!full_update)
1896 return;
1897
1898 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1899 width, height);
1900 break;
1901 }
1902
1903 if (width != s->last_width || height != s->last_height ||
1904 cw != s->last_cw || cheight != s->last_ch) {
1905 s->last_scr_width = width * cw;
1906 s->last_scr_height = height * cheight;
1907 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1908 dpy_text_resize(s->con, width, height);
1909 s->last_depth = 0;
1910 s->last_width = width;
1911 s->last_height = height;
1912 s->last_ch = cheight;
1913 s->last_cw = cw;
1914 full_update = 1;
1915 }
1916
1917 if (full_update) {
1918 s->full_update_gfx = 1;
1919 }
1920 if (s->full_update_text) {
1921 s->full_update_text = 0;
1922 full_update |= 1;
1923 }
1924
1925 /* Update "hardware" cursor */
1926 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1927 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1928 if (cursor_offset != s->cursor_offset ||
1929 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1930 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1931 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1932 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1933 dpy_text_cursor(s->con,
1934 TEXTMODE_X(cursor_offset),
1935 TEXTMODE_Y(cursor_offset));
1936 else
1937 dpy_text_cursor(s->con, -1, -1);
1938 s->cursor_offset = cursor_offset;
1939 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1940 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1941 }
1942
1943 src = (uint32_t *) s->vram_ptr + s->start_addr;
1944 dst = chardata;
1945
1946 if (full_update) {
1947 for (i = 0; i < size; src ++, dst ++, i ++)
1948 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1949
1950 dpy_text_update(s->con, 0, 0, width, height);
1951 } else {
1952 c_max = 0;
1953
1954 for (i = 0; i < size; src ++, dst ++, i ++) {
1955 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1956 if (*dst != val) {
1957 *dst = val;
1958 c_max = i;
1959 break;
1960 }
1961 }
1962 c_min = i;
1963 for (; i < size; src ++, dst ++, i ++) {
1964 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1965 if (*dst != val) {
1966 *dst = val;
1967 c_max = i;
1968 }
1969 }
1970
1971 if (c_min <= c_max) {
1972 i = TEXTMODE_Y(c_min);
1973 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
1974 }
1975 }
1976
1977 return;
1978 case GMODE_GRAPH:
1979 if (!full_update)
1980 return;
1981
1982 s->get_resolution(s, &width, &height);
1983 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
1984 width, height);
1985 break;
1986 case GMODE_BLANK:
1987 default:
1988 if (!full_update)
1989 return;
1990
1991 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
1992 break;
1993 }
1994
1995 /* Display a message */
1996 s->last_width = 60;
1997 s->last_height = height = 3;
1998 dpy_text_cursor(s->con, -1, -1);
1999 dpy_text_resize(s->con, s->last_width, height);
2000
2001 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2002 console_write_ch(dst ++, ' ');
2003
2004 size = strlen(msg_buffer);
2005 width = (s->last_width - size) / 2;
2006 dst = chardata + s->last_width + width;
2007 for (i = 0; i < size; i ++)
2008 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2009 QEMU_COLOR_BLACK, 1));
2010
2011 dpy_text_update(s->con, 0, 0, s->last_width, height);
2012 }
2013
2014 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2015 unsigned size)
2016 {
2017 VGACommonState *s = opaque;
2018
2019 return vga_mem_readb(s, addr);
2020 }
2021
2022 static void vga_mem_write(void *opaque, hwaddr addr,
2023 uint64_t data, unsigned size)
2024 {
2025 VGACommonState *s = opaque;
2026
2027 vga_mem_writeb(s, addr, data);
2028 }
2029
2030 const MemoryRegionOps vga_mem_ops = {
2031 .read = vga_mem_read,
2032 .write = vga_mem_write,
2033 .endianness = DEVICE_LITTLE_ENDIAN,
2034 .impl = {
2035 .min_access_size = 1,
2036 .max_access_size = 1,
2037 },
2038 };
2039
2040 static int vga_common_post_load(void *opaque, int version_id)
2041 {
2042 VGACommonState *s = opaque;
2043
2044 /* force refresh */
2045 s->graphic_mode = -1;
2046 vbe_update_vgaregs(s);
2047 return 0;
2048 }
2049
2050 static bool vga_endian_state_needed(void *opaque)
2051 {
2052 VGACommonState *s = opaque;
2053
2054 /*
2055 * Only send the endian state if it's different from the
2056 * default one, thus ensuring backward compatibility for
2057 * migration of the common case
2058 */
2059 return s->default_endian_fb != s->big_endian_fb;
2060 }
2061
2062 static const VMStateDescription vmstate_vga_endian = {
2063 .name = "vga.endian",
2064 .version_id = 1,
2065 .minimum_version_id = 1,
2066 .needed = vga_endian_state_needed,
2067 .fields = (VMStateField[]) {
2068 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2069 VMSTATE_END_OF_LIST()
2070 }
2071 };
2072
2073 const VMStateDescription vmstate_vga_common = {
2074 .name = "vga",
2075 .version_id = 2,
2076 .minimum_version_id = 2,
2077 .post_load = vga_common_post_load,
2078 .fields = (VMStateField[]) {
2079 VMSTATE_UINT32(latch, VGACommonState),
2080 VMSTATE_UINT8(sr_index, VGACommonState),
2081 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2082 VMSTATE_UINT8(gr_index, VGACommonState),
2083 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2084 VMSTATE_UINT8(ar_index, VGACommonState),
2085 VMSTATE_BUFFER(ar, VGACommonState),
2086 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2087 VMSTATE_UINT8(cr_index, VGACommonState),
2088 VMSTATE_BUFFER(cr, VGACommonState),
2089 VMSTATE_UINT8(msr, VGACommonState),
2090 VMSTATE_UINT8(fcr, VGACommonState),
2091 VMSTATE_UINT8(st00, VGACommonState),
2092 VMSTATE_UINT8(st01, VGACommonState),
2093
2094 VMSTATE_UINT8(dac_state, VGACommonState),
2095 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2096 VMSTATE_UINT8(dac_read_index, VGACommonState),
2097 VMSTATE_UINT8(dac_write_index, VGACommonState),
2098 VMSTATE_BUFFER(dac_cache, VGACommonState),
2099 VMSTATE_BUFFER(palette, VGACommonState),
2100
2101 VMSTATE_INT32(bank_offset, VGACommonState),
2102 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2103 VMSTATE_UINT16(vbe_index, VGACommonState),
2104 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2105 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2106 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2107 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2108 VMSTATE_END_OF_LIST()
2109 },
2110 .subsections = (const VMStateDescription*[]) {
2111 &vmstate_vga_endian,
2112 NULL
2113 }
2114 };
2115
2116 static const GraphicHwOps vga_ops = {
2117 .invalidate = vga_invalidate_display,
2118 .gfx_update = vga_update_display,
2119 .text_update = vga_update_text,
2120 };
2121
2122 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2123 {
2124 if (val < vmin) {
2125 return vmin;
2126 }
2127 if (val > vmax) {
2128 return vmax;
2129 }
2130 return val;
2131 }
2132
2133 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2134 {
2135 int i, j, v, b;
2136
2137 for(i = 0;i < 256; i++) {
2138 v = 0;
2139 for(j = 0; j < 8; j++) {
2140 v |= ((i >> j) & 1) << (j * 4);
2141 }
2142 expand4[i] = v;
2143
2144 v = 0;
2145 for(j = 0; j < 4; j++) {
2146 v |= ((i >> (2 * j)) & 3) << (j * 4);
2147 }
2148 expand2[i] = v;
2149 }
2150 for(i = 0; i < 16; i++) {
2151 v = 0;
2152 for(j = 0; j < 4; j++) {
2153 b = ((i >> j) & 1);
2154 v |= b << (2 * j);
2155 v |= b << (2 * j + 1);
2156 }
2157 expand4to8[i] = v;
2158 }
2159
2160 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2161 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2162 s->vram_size = s->vram_size_mb << 20;
2163
2164 if (!s->vbe_size) {
2165 s->vbe_size = s->vram_size;
2166 }
2167
2168 s->is_vbe_vmstate = 1;
2169 memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size,
2170 &error_fatal);
2171 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2172 xen_register_framebuffer(&s->vram);
2173 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2174 s->get_bpp = vga_get_bpp;
2175 s->get_offsets = vga_get_offsets;
2176 s->get_resolution = vga_get_resolution;
2177 s->hw_ops = &vga_ops;
2178 switch (vga_retrace_method) {
2179 case VGA_RETRACE_DUMB:
2180 s->retrace = vga_dumb_retrace;
2181 s->update_retrace_info = vga_dumb_update_retrace_info;
2182 break;
2183
2184 case VGA_RETRACE_PRECISE:
2185 s->retrace = vga_precise_retrace;
2186 s->update_retrace_info = vga_precise_update_retrace_info;
2187 break;
2188 }
2189
2190 /*
2191 * Set default fb endian based on target, could probably be turned
2192 * into a device attribute set by the machine/platform to remove
2193 * all target endian dependencies from this file.
2194 */
2195 #ifdef TARGET_WORDS_BIGENDIAN
2196 s->default_endian_fb = true;
2197 #else
2198 s->default_endian_fb = false;
2199 #endif
2200 vga_dirty_log_start(s);
2201 }
2202
2203 static const MemoryRegionPortio vga_portio_list[] = {
2204 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2205 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2206 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2207 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2208 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2209 PORTIO_END_OF_LIST(),
2210 };
2211
2212 static const MemoryRegionPortio vbe_portio_list[] = {
2213 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2214 # ifdef TARGET_I386
2215 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2216 # endif
2217 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2218 PORTIO_END_OF_LIST(),
2219 };
2220
2221 /* Used by both ISA and PCI */
2222 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2223 const MemoryRegionPortio **vga_ports,
2224 const MemoryRegionPortio **vbe_ports)
2225 {
2226 MemoryRegion *vga_mem;
2227
2228 *vga_ports = vga_portio_list;
2229 *vbe_ports = vbe_portio_list;
2230
2231 vga_mem = g_malloc(sizeof(*vga_mem));
2232 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2233 "vga-lowmem", 0x20000);
2234 memory_region_set_flush_coalesced(vga_mem);
2235
2236 return vga_mem;
2237 }
2238
2239 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2240 MemoryRegion *address_space_io, bool init_vga_ports)
2241 {
2242 MemoryRegion *vga_io_memory;
2243 const MemoryRegionPortio *vga_ports, *vbe_ports;
2244
2245 qemu_register_reset(vga_reset, s);
2246
2247 s->bank_offset = 0;
2248
2249 s->legacy_address_space = address_space;
2250
2251 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2252 memory_region_add_subregion_overlap(address_space,
2253 0x000a0000,
2254 vga_io_memory,
2255 1);
2256 memory_region_set_coalescing(vga_io_memory);
2257 if (init_vga_ports) {
2258 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2259 portio_list_set_flush_coalesced(&s->vga_port_list);
2260 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2261 }
2262 if (vbe_ports) {
2263 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2264 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2265 }
2266 }
2267
2268 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2269 {
2270 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2271 * so use an alias to avoid double-mapping the same region.
2272 */
2273 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2274 &s->vram, 0, memory_region_size(&s->vram));
2275 /* XXX: use optimized standard vga accesses */
2276 memory_region_add_subregion(system_memory,
2277 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2278 &s->vram_vbe);
2279 s->vbe_mapped = 1;
2280 }