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libqos: move useful qos-test funcs to qos_external
[qemu/ar7.git] / hw / display / vga.c
blob061fd9ab8f6c1ee2398ee745249effc7daaf8cd3
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
25 #include "qemu/osdep.h"
26 #include "qemu/units.h"
27 #include "sysemu/reset.h"
28 #include "qapi/error.h"
29 #include "hw/display/vga.h"
30 #include "hw/pci/pci.h"
31 #include "vga_int.h"
32 #include "vga_regs.h"
33 #include "ui/pixel_ops.h"
34 #include "qemu/timer.h"
35 #include "hw/xen/xen.h"
36 #include "migration/vmstate.h"
37 #include "trace.h"
38
39 //#define DEBUG_VGA_MEM
40 //#define DEBUG_VGA_REG
41
42 /* 16 state changes per vertical frame @60 Hz */
43 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
44
45 /*
46 * Video Graphics Array (VGA)
47 *
48 * Chipset docs for original IBM VGA:
49 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
50 *
51 * FreeVGA site:
52 * http://www.osdever.net/FreeVGA/home.htm
53 *
54 * Standard VGA features and Bochs VBE extensions are implemented.
55 */
56
57 /* force some bits to zero */
58 const uint8_t sr_mask[8] = {
59 0x03,
60 0x3d,
61 0x0f,
62 0x3f,
63 0x0e,
64 0x00,
65 0x00,
66 0xff,
67 };
68
69 const uint8_t gr_mask[16] = {
70 0x0f, /* 0x00 */
71 0x0f, /* 0x01 */
72 0x0f, /* 0x02 */
73 0x1f, /* 0x03 */
74 0x03, /* 0x04 */
75 0x7b, /* 0x05 */
76 0x0f, /* 0x06 */
77 0x0f, /* 0x07 */
78 0xff, /* 0x08 */
79 0x00, /* 0x09 */
80 0x00, /* 0x0a */
81 0x00, /* 0x0b */
82 0x00, /* 0x0c */
83 0x00, /* 0x0d */
84 0x00, /* 0x0e */
85 0x00, /* 0x0f */
86 };
87
88 #define cbswap_32(__x) \
89 ((uint32_t)( \
90 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
91 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
92 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
93 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
94
95 #ifdef HOST_WORDS_BIGENDIAN
96 #define PAT(x) cbswap_32(x)
97 #else
98 #define PAT(x) (x)
99 #endif
100
101 #ifdef HOST_WORDS_BIGENDIAN
102 #define BIG 1
103 #else
104 #define BIG 0
105 #endif
106
107 #ifdef HOST_WORDS_BIGENDIAN
108 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
109 #else
110 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
111 #endif
112
113 static const uint32_t mask16[16] = {
114 PAT(0x00000000),
115 PAT(0x000000ff),
116 PAT(0x0000ff00),
117 PAT(0x0000ffff),
118 PAT(0x00ff0000),
119 PAT(0x00ff00ff),
120 PAT(0x00ffff00),
121 PAT(0x00ffffff),
122 PAT(0xff000000),
123 PAT(0xff0000ff),
124 PAT(0xff00ff00),
125 PAT(0xff00ffff),
126 PAT(0xffff0000),
127 PAT(0xffff00ff),
128 PAT(0xffffff00),
129 PAT(0xffffffff),
130 };
131
132 #undef PAT
133
134 #ifdef HOST_WORDS_BIGENDIAN
135 #define PAT(x) (x)
136 #else
137 #define PAT(x) cbswap_32(x)
138 #endif
139
140 static uint32_t expand4[256];
141 static uint16_t expand2[256];
142 static uint8_t expand4to8[16];
143
144 static void vbe_update_vgaregs(VGACommonState *s);
145
146 static inline bool vbe_enabled(VGACommonState *s)
147 {
148 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
149 }
150
151 static inline uint8_t sr(VGACommonState *s, int idx)
152 {
153 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
154 }
155
156 static void vga_update_memory_access(VGACommonState *s)
157 {
158 hwaddr base, offset, size;
159
160 if (s->legacy_address_space == NULL) {
161 return;
162 }
163
164 if (s->has_chain4_alias) {
165 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
166 object_unparent(OBJECT(&s->chain4_alias));
167 s->has_chain4_alias = false;
168 s->plane_updated = 0xf;
169 }
170 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
171 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
172 offset = 0;
173 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
174 case 0:
175 base = 0xa0000;
176 size = 0x20000;
177 break;
178 case 1:
179 base = 0xa0000;
180 size = 0x10000;
181 offset = s->bank_offset;
182 break;
183 case 2:
184 base = 0xb0000;
185 size = 0x8000;
186 break;
187 case 3:
188 default:
189 base = 0xb8000;
190 size = 0x8000;
191 break;
192 }
193 assert(offset + size <= s->vram_size);
194 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
195 "vga.chain4", &s->vram, offset, size);
196 memory_region_add_subregion_overlap(s->legacy_address_space, base,
197 &s->chain4_alias, 2);
198 s->has_chain4_alias = true;
199 }
200 }
201
202 static void vga_dumb_update_retrace_info(VGACommonState *s)
203 {
204 (void) s;
205 }
206
207 static void vga_precise_update_retrace_info(VGACommonState *s)
208 {
209 int htotal_chars;
210 int hretr_start_char;
211 int hretr_skew_chars;
212 int hretr_end_char;
213
214 int vtotal_lines;
215 int vretr_start_line;
216 int vretr_end_line;
217
218 int dots;
219 #if 0
220 int div2, sldiv2;
221 #endif
222 int clocking_mode;
223 int clock_sel;
224 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
225 int64_t chars_per_sec;
226 struct vga_precise_retrace *r = &s->retrace_info.precise;
227
228 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
229 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
230 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
231 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
232
233 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
234 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
235 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
236 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
237 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
238 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
239 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
240
241 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
242 clock_sel = (s->msr >> 2) & 3;
243 dots = (s->msr & 1) ? 8 : 9;
244
245 chars_per_sec = clk_hz[clock_sel] / dots;
246
247 htotal_chars <<= clocking_mode;
248
249 r->total_chars = vtotal_lines * htotal_chars;
250 if (r->freq) {
251 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
252 } else {
253 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
254 }
255
256 r->vstart = vretr_start_line;
257 r->vend = r->vstart + vretr_end_line + 1;
258
259 r->hstart = hretr_start_char + hretr_skew_chars;
260 r->hend = r->hstart + hretr_end_char + 1;
261 r->htotal = htotal_chars;
262
263 #if 0
264 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
265 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
266 printf (
267 "hz=%f\n"
268 "htotal = %d\n"
269 "hretr_start = %d\n"
270 "hretr_skew = %d\n"
271 "hretr_end = %d\n"
272 "vtotal = %d\n"
273 "vretr_start = %d\n"
274 "vretr_end = %d\n"
275 "div2 = %d sldiv2 = %d\n"
276 "clocking_mode = %d\n"
277 "clock_sel = %d %d\n"
278 "dots = %d\n"
279 "ticks/char = %" PRId64 "\n"
280 "\n",
281 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
282 htotal_chars,
283 hretr_start_char,
284 hretr_skew_chars,
285 hretr_end_char,
286 vtotal_lines,
287 vretr_start_line,
288 vretr_end_line,
289 div2, sldiv2,
290 clocking_mode,
291 clock_sel,
292 clk_hz[clock_sel],
293 dots,
294 r->ticks_per_char
295 );
296 #endif
297 }
298
299 static uint8_t vga_precise_retrace(VGACommonState *s)
300 {
301 struct vga_precise_retrace *r = &s->retrace_info.precise;
302 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
303
304 if (r->total_chars) {
305 int cur_line, cur_line_char, cur_char;
306 int64_t cur_tick;
307
308 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
309
310 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
311 cur_line = cur_char / r->htotal;
312
313 if (cur_line >= r->vstart && cur_line <= r->vend) {
314 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
315 } else {
316 cur_line_char = cur_char % r->htotal;
317 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
318 val |= ST01_DISP_ENABLE;
319 }
320 }
321
322 return val;
323 } else {
324 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
325 }
326 }
327
328 static uint8_t vga_dumb_retrace(VGACommonState *s)
329 {
330 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
331 }
332
333 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
334 {
335 if (s->msr & VGA_MIS_COLOR) {
336 /* Color */
337 return (addr >= 0x3b0 && addr <= 0x3bf);
338 } else {
339 /* Monochrome */
340 return (addr >= 0x3d0 && addr <= 0x3df);
341 }
342 }
343
344 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
345 {
346 VGACommonState *s = opaque;
347 int val, index;
348
349 if (vga_ioport_invalid(s, addr)) {
350 val = 0xff;
351 } else {
352 switch(addr) {
353 case VGA_ATT_W:
354 if (s->ar_flip_flop == 0) {
355 val = s->ar_index;
356 } else {
357 val = 0;
358 }
359 break;
360 case VGA_ATT_R:
361 index = s->ar_index & 0x1f;
362 if (index < VGA_ATT_C) {
363 val = s->ar[index];
364 } else {
365 val = 0;
366 }
367 break;
368 case VGA_MIS_W:
369 val = s->st00;
370 break;
371 case VGA_SEQ_I:
372 val = s->sr_index;
373 break;
374 case VGA_SEQ_D:
375 val = s->sr[s->sr_index];
376 #ifdef DEBUG_VGA_REG
377 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
378 #endif
379 break;
380 case VGA_PEL_IR:
381 val = s->dac_state;
382 break;
383 case VGA_PEL_IW:
384 val = s->dac_write_index;
385 break;
386 case VGA_PEL_D:
387 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
388 if (++s->dac_sub_index == 3) {
389 s->dac_sub_index = 0;
390 s->dac_read_index++;
391 }
392 break;
393 case VGA_FTC_R:
394 val = s->fcr;
395 break;
396 case VGA_MIS_R:
397 val = s->msr;
398 break;
399 case VGA_GFX_I:
400 val = s->gr_index;
401 break;
402 case VGA_GFX_D:
403 val = s->gr[s->gr_index];
404 #ifdef DEBUG_VGA_REG
405 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
406 #endif
407 break;
408 case VGA_CRT_IM:
409 case VGA_CRT_IC:
410 val = s->cr_index;
411 break;
412 case VGA_CRT_DM:
413 case VGA_CRT_DC:
414 val = s->cr[s->cr_index];
415 #ifdef DEBUG_VGA_REG
416 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
417 #endif
418 break;
419 case VGA_IS1_RM:
420 case VGA_IS1_RC:
421 /* just toggle to fool polling */
422 val = s->st01 = s->retrace(s);
423 s->ar_flip_flop = 0;
424 break;
425 default:
426 val = 0x00;
427 break;
428 }
429 }
430 trace_vga_std_read_io(addr, val);
431 return val;
432 }
433
434 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
435 {
436 VGACommonState *s = opaque;
437 int index;
438
439 /* check port range access depending on color/monochrome mode */
440 if (vga_ioport_invalid(s, addr)) {
441 return;
442 }
443 trace_vga_std_write_io(addr, val);
444
445 switch(addr) {
446 case VGA_ATT_W:
447 if (s->ar_flip_flop == 0) {
448 val &= 0x3f;
449 s->ar_index = val;
450 } else {
451 index = s->ar_index & 0x1f;
452 switch(index) {
453 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
454 s->ar[index] = val & 0x3f;
455 break;
456 case VGA_ATC_MODE:
457 s->ar[index] = val & ~0x10;
458 break;
459 case VGA_ATC_OVERSCAN:
460 s->ar[index] = val;
461 break;
462 case VGA_ATC_PLANE_ENABLE:
463 s->ar[index] = val & ~0xc0;
464 break;
465 case VGA_ATC_PEL:
466 s->ar[index] = val & ~0xf0;
467 break;
468 case VGA_ATC_COLOR_PAGE:
469 s->ar[index] = val & ~0xf0;
470 break;
471 default:
472 break;
473 }
474 }
475 s->ar_flip_flop ^= 1;
476 break;
477 case VGA_MIS_W:
478 s->msr = val & ~0x10;
479 s->update_retrace_info(s);
480 break;
481 case VGA_SEQ_I:
482 s->sr_index = val & 7;
483 break;
484 case VGA_SEQ_D:
485 #ifdef DEBUG_VGA_REG
486 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
487 #endif
488 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
489 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
490 s->update_retrace_info(s);
491 }
492 vga_update_memory_access(s);
493 break;
494 case VGA_PEL_IR:
495 s->dac_read_index = val;
496 s->dac_sub_index = 0;
497 s->dac_state = 3;
498 break;
499 case VGA_PEL_IW:
500 s->dac_write_index = val;
501 s->dac_sub_index = 0;
502 s->dac_state = 0;
503 break;
504 case VGA_PEL_D:
505 s->dac_cache[s->dac_sub_index] = val;
506 if (++s->dac_sub_index == 3) {
507 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
508 s->dac_sub_index = 0;
509 s->dac_write_index++;
510 }
511 break;
512 case VGA_GFX_I:
513 s->gr_index = val & 0x0f;
514 break;
515 case VGA_GFX_D:
516 #ifdef DEBUG_VGA_REG
517 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
518 #endif
519 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
520 vbe_update_vgaregs(s);
521 vga_update_memory_access(s);
522 break;
523 case VGA_CRT_IM:
524 case VGA_CRT_IC:
525 s->cr_index = val;
526 break;
527 case VGA_CRT_DM:
528 case VGA_CRT_DC:
529 #ifdef DEBUG_VGA_REG
530 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
531 #endif
532 /* handle CR0-7 protection */
533 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
534 s->cr_index <= VGA_CRTC_OVERFLOW) {
535 /* can always write bit 4 of CR7 */
536 if (s->cr_index == VGA_CRTC_OVERFLOW) {
537 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
538 (val & 0x10);
539 vbe_update_vgaregs(s);
540 }
541 return;
542 }
543 s->cr[s->cr_index] = val;
544 vbe_update_vgaregs(s);
545
546 switch(s->cr_index) {
547 case VGA_CRTC_H_TOTAL:
548 case VGA_CRTC_H_SYNC_START:
549 case VGA_CRTC_H_SYNC_END:
550 case VGA_CRTC_V_TOTAL:
551 case VGA_CRTC_OVERFLOW:
552 case VGA_CRTC_V_SYNC_END:
553 case VGA_CRTC_MODE:
554 s->update_retrace_info(s);
555 break;
556 }
557 break;
558 case VGA_IS1_RM:
559 case VGA_IS1_RC:
560 s->fcr = val & 0x10;
561 break;
562 }
563 }
564
565 /*
566 * Sanity check vbe register writes.
567 *
568 * As we don't have a way to signal errors to the guest in the bochs
569 * dispi interface we'll go adjust the registers to the closest valid
570 * value.
571 */
572 static void vbe_fixup_regs(VGACommonState *s)
573 {
574 uint16_t *r = s->vbe_regs;
575 uint32_t bits, linelength, maxy, offset;
576
577 if (!vbe_enabled(s)) {
578 /* vbe is turned off -- nothing to do */
579 return;
580 }
581
582 /* check depth */
583 switch (r[VBE_DISPI_INDEX_BPP]) {
584 case 4:
585 case 8:
586 case 16:
587 case 24:
588 case 32:
589 bits = r[VBE_DISPI_INDEX_BPP];
590 break;
591 case 15:
592 bits = 16;
593 break;
594 default:
595 bits = r[VBE_DISPI_INDEX_BPP] = 8;
596 break;
597 }
598
599 /* check width */
600 r[VBE_DISPI_INDEX_XRES] &= ~7u;
601 if (r[VBE_DISPI_INDEX_XRES] == 0) {
602 r[VBE_DISPI_INDEX_XRES] = 8;
603 }
604 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
605 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
606 }
607 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
608 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
609 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
610 }
611 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
612 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
613 }
614
615 /* check height */
616 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
617 maxy = s->vbe_size / linelength;
618 if (r[VBE_DISPI_INDEX_YRES] == 0) {
619 r[VBE_DISPI_INDEX_YRES] = 1;
620 }
621 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
622 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
623 }
624 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
625 r[VBE_DISPI_INDEX_YRES] = maxy;
626 }
627
628 /* check offset */
629 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
630 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
631 }
632 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
633 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
634 }
635 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
636 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
637 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
638 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
639 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
640 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
641 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
642 offset = 0;
643 }
644 }
645
646 /* update vga state */
647 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
648 s->vbe_line_offset = linelength;
649 s->vbe_start_addr = offset / 4;
650 }
651
652 /* we initialize the VGA graphic mode */
653 static void vbe_update_vgaregs(VGACommonState *s)
654 {
655 int h, shift_control;
656
657 if (!vbe_enabled(s)) {
658 /* vbe is turned off -- nothing to do */
659 return;
660 }
661
662 /* graphic mode + memory map 1 */
663 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
664 VGA_GR06_GRAPHICS_MODE;
665 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
666 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
667 /* width */
668 s->cr[VGA_CRTC_H_DISP] =
669 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
670 /* height (only meaningful if < 1024) */
671 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
672 s->cr[VGA_CRTC_V_DISP_END] = h;
673 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
674 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
675 /* line compare to 1023 */
676 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
677 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
678 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
679
680 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
681 shift_control = 0;
682 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
683 } else {
684 shift_control = 2;
685 /* set chain 4 mode */
686 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
687 /* activate all planes */
688 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
689 }
690 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
691 (shift_control << 5);
692 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
693 }
694
695 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
696 {
697 VGACommonState *s = opaque;
698 return s->vbe_index;
699 }
700
701 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
702 {
703 VGACommonState *s = opaque;
704 uint32_t val;
705
706 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
707 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
708 switch(s->vbe_index) {
709 /* XXX: do not hardcode ? */
710 case VBE_DISPI_INDEX_XRES:
711 val = VBE_DISPI_MAX_XRES;
712 break;
713 case VBE_DISPI_INDEX_YRES:
714 val = VBE_DISPI_MAX_YRES;
715 break;
716 case VBE_DISPI_INDEX_BPP:
717 val = VBE_DISPI_MAX_BPP;
718 break;
719 default:
720 val = s->vbe_regs[s->vbe_index];
721 break;
722 }
723 } else {
724 val = s->vbe_regs[s->vbe_index];
725 }
726 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
727 val = s->vbe_size / (64 * KiB);
728 } else {
729 val = 0;
730 }
731 trace_vga_vbe_read(s->vbe_index, val);
732 return val;
733 }
734
735 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
736 {
737 VGACommonState *s = opaque;
738 s->vbe_index = val;
739 }
740
741 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
742 {
743 VGACommonState *s = opaque;
744
745 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
746 trace_vga_vbe_write(s->vbe_index, val);
747 switch(s->vbe_index) {
748 case VBE_DISPI_INDEX_ID:
749 if (val == VBE_DISPI_ID0 ||
750 val == VBE_DISPI_ID1 ||
751 val == VBE_DISPI_ID2 ||
752 val == VBE_DISPI_ID3 ||
753 val == VBE_DISPI_ID4) {
754 s->vbe_regs[s->vbe_index] = val;
755 }
756 break;
757 case VBE_DISPI_INDEX_XRES:
758 case VBE_DISPI_INDEX_YRES:
759 case VBE_DISPI_INDEX_BPP:
760 case VBE_DISPI_INDEX_VIRT_WIDTH:
761 case VBE_DISPI_INDEX_X_OFFSET:
762 case VBE_DISPI_INDEX_Y_OFFSET:
763 s->vbe_regs[s->vbe_index] = val;
764 vbe_fixup_regs(s);
765 vbe_update_vgaregs(s);
766 break;
767 case VBE_DISPI_INDEX_BANK:
768 val &= s->vbe_bank_mask;
769 s->vbe_regs[s->vbe_index] = val;
770 s->bank_offset = (val << 16);
771 vga_update_memory_access(s);
772 break;
773 case VBE_DISPI_INDEX_ENABLE:
774 if ((val & VBE_DISPI_ENABLED) &&
775 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
776
777 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
778 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
779 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
780 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
781 vbe_fixup_regs(s);
782 vbe_update_vgaregs(s);
783
784 /* clear the screen */
785 if (!(val & VBE_DISPI_NOCLEARMEM)) {
786 memset(s->vram_ptr, 0,
787 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
788 }
789 } else {
790 s->bank_offset = 0;
791 }
792 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
793 s->vbe_regs[s->vbe_index] = val;
794 vga_update_memory_access(s);
795 break;
796 default:
797 break;
798 }
799 }
800 }
801
802 /* called for accesses between 0xa0000 and 0xc0000 */
803 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
804 {
805 int memory_map_mode, plane;
806 uint32_t ret;
807
808 /* convert to VGA memory offset */
809 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
810 addr &= 0x1ffff;
811 switch(memory_map_mode) {
812 case 0:
813 break;
814 case 1:
815 if (addr >= 0x10000)
816 return 0xff;
817 addr += s->bank_offset;
818 break;
819 case 2:
820 addr -= 0x10000;
821 if (addr >= 0x8000)
822 return 0xff;
823 break;
824 default:
825 case 3:
826 addr -= 0x18000;
827 if (addr >= 0x8000)
828 return 0xff;
829 break;
830 }
831
832 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
833 /* chain 4 mode : simplest access */
834 assert(addr < s->vram_size);
835 ret = s->vram_ptr[addr];
836 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
837 /* odd/even mode (aka text mode mapping) */
838 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
839 addr = ((addr & ~1) << 1) | plane;
840 if (addr >= s->vram_size) {
841 return 0xff;
842 }
843 ret = s->vram_ptr[addr];
844 } else {
845 /* standard VGA latched access */
846 if (addr * sizeof(uint32_t) >= s->vram_size) {
847 return 0xff;
848 }
849 s->latch = ((uint32_t *)s->vram_ptr)[addr];
850
851 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
852 /* read mode 0 */
853 plane = s->gr[VGA_GFX_PLANE_READ];
854 ret = GET_PLANE(s->latch, plane);
855 } else {
856 /* read mode 1 */
857 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
858 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
859 ret |= ret >> 16;
860 ret |= ret >> 8;
861 ret = (~ret) & 0xff;
862 }
863 }
864 return ret;
865 }
866
867 /* called for accesses between 0xa0000 and 0xc0000 */
868 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
869 {
870 int memory_map_mode, plane, write_mode, b, func_select, mask;
871 uint32_t write_mask, bit_mask, set_mask;
872
873 #ifdef DEBUG_VGA_MEM
874 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
875 #endif
876 /* convert to VGA memory offset */
877 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
878 addr &= 0x1ffff;
879 switch(memory_map_mode) {
880 case 0:
881 break;
882 case 1:
883 if (addr >= 0x10000)
884 return;
885 addr += s->bank_offset;
886 break;
887 case 2:
888 addr -= 0x10000;
889 if (addr >= 0x8000)
890 return;
891 break;
892 default:
893 case 3:
894 addr -= 0x18000;
895 if (addr >= 0x8000)
896 return;
897 break;
898 }
899
900 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
901 /* chain 4 mode : simplest access */
902 plane = addr & 3;
903 mask = (1 << plane);
904 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
905 assert(addr < s->vram_size);
906 s->vram_ptr[addr] = val;
907 #ifdef DEBUG_VGA_MEM
908 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
909 #endif
910 s->plane_updated |= mask; /* only used to detect font change */
911 memory_region_set_dirty(&s->vram, addr, 1);
912 }
913 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
914 /* odd/even mode (aka text mode mapping) */
915 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
916 mask = (1 << plane);
917 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
918 addr = ((addr & ~1) << 1) | plane;
919 if (addr >= s->vram_size) {
920 return;
921 }
922 s->vram_ptr[addr] = val;
923 #ifdef DEBUG_VGA_MEM
924 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
925 #endif
926 s->plane_updated |= mask; /* only used to detect font change */
927 memory_region_set_dirty(&s->vram, addr, 1);
928 }
929 } else {
930 /* standard VGA latched access */
931 write_mode = s->gr[VGA_GFX_MODE] & 3;
932 switch(write_mode) {
933 default:
934 case 0:
935 /* rotate */
936 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
937 val = ((val >> b) | (val << (8 - b))) & 0xff;
938 val |= val << 8;
939 val |= val << 16;
940
941 /* apply set/reset mask */
942 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
943 val = (val & ~set_mask) |
944 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
945 bit_mask = s->gr[VGA_GFX_BIT_MASK];
946 break;
947 case 1:
948 val = s->latch;
949 goto do_write;
950 case 2:
951 val = mask16[val & 0x0f];
952 bit_mask = s->gr[VGA_GFX_BIT_MASK];
953 break;
954 case 3:
955 /* rotate */
956 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
957 val = (val >> b) | (val << (8 - b));
958
959 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
960 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
961 break;
962 }
963
964 /* apply logical operation */
965 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
966 switch(func_select) {
967 case 0:
968 default:
969 /* nothing to do */
970 break;
971 case 1:
972 /* and */
973 val &= s->latch;
974 break;
975 case 2:
976 /* or */
977 val |= s->latch;
978 break;
979 case 3:
980 /* xor */
981 val ^= s->latch;
982 break;
983 }
984
985 /* apply bit mask */
986 bit_mask |= bit_mask << 8;
987 bit_mask |= bit_mask << 16;
988 val = (val & bit_mask) | (s->latch & ~bit_mask);
989
990 do_write:
991 /* mask data according to sr[2] */
992 mask = sr(s, VGA_SEQ_PLANE_WRITE);
993 s->plane_updated |= mask; /* only used to detect font change */
994 write_mask = mask16[mask];
995 if (addr * sizeof(uint32_t) >= s->vram_size) {
996 return;
997 }
998 ((uint32_t *)s->vram_ptr)[addr] =
999 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
1000 (val & write_mask);
1001 #ifdef DEBUG_VGA_MEM
1002 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1003 addr * 4, write_mask, val);
1004 #endif
1005 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1006 }
1007 }
1008
1009 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1010 uint32_t srcaddr, int width);
1011
1012 #include "vga-access.h"
1013 #include "vga-helpers.h"
1014
1015 /* return true if the palette was modified */
1016 static int update_palette16(VGACommonState *s)
1017 {
1018 int full_update, i;
1019 uint32_t v, col, *palette;
1020
1021 full_update = 0;
1022 palette = s->last_palette;
1023 for(i = 0; i < 16; i++) {
1024 v = s->ar[i];
1025 if (s->ar[VGA_ATC_MODE] & 0x80) {
1026 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1027 } else {
1028 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1029 }
1030 v = v * 3;
1031 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1032 c6_to_8(s->palette[v + 1]),
1033 c6_to_8(s->palette[v + 2]));
1034 if (col != palette[i]) {
1035 full_update = 1;
1036 palette[i] = col;
1037 }
1038 }
1039 return full_update;
1040 }
1041
1042 /* return true if the palette was modified */
1043 static int update_palette256(VGACommonState *s)
1044 {
1045 int full_update, i;
1046 uint32_t v, col, *palette;
1047
1048 full_update = 0;
1049 palette = s->last_palette;
1050 v = 0;
1051 for(i = 0; i < 256; i++) {
1052 if (s->dac_8bit) {
1053 col = rgb_to_pixel32(s->palette[v],
1054 s->palette[v + 1],
1055 s->palette[v + 2]);
1056 } else {
1057 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1058 c6_to_8(s->palette[v + 1]),
1059 c6_to_8(s->palette[v + 2]));
1060 }
1061 if (col != palette[i]) {
1062 full_update = 1;
1063 palette[i] = col;
1064 }
1065 v += 3;
1066 }
1067 return full_update;
1068 }
1069
1070 static void vga_get_offsets(VGACommonState *s,
1071 uint32_t *pline_offset,
1072 uint32_t *pstart_addr,
1073 uint32_t *pline_compare)
1074 {
1075 uint32_t start_addr, line_offset, line_compare;
1076
1077 if (vbe_enabled(s)) {
1078 line_offset = s->vbe_line_offset;
1079 start_addr = s->vbe_start_addr;
1080 line_compare = 65535;
1081 } else {
1082 /* compute line_offset in bytes */
1083 line_offset = s->cr[VGA_CRTC_OFFSET];
1084 line_offset <<= 3;
1085
1086 /* starting address */
1087 start_addr = s->cr[VGA_CRTC_START_LO] |
1088 (s->cr[VGA_CRTC_START_HI] << 8);
1089
1090 /* line compare */
1091 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1092 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1093 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1094 }
1095 *pline_offset = line_offset;
1096 *pstart_addr = start_addr;
1097 *pline_compare = line_compare;
1098 }
1099
1100 /* update start_addr and line_offset. Return TRUE if modified */
1101 static int update_basic_params(VGACommonState *s)
1102 {
1103 int full_update;
1104 uint32_t start_addr, line_offset, line_compare;
1105
1106 full_update = 0;
1107
1108 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1109
1110 if (line_offset != s->line_offset ||
1111 start_addr != s->start_addr ||
1112 line_compare != s->line_compare) {
1113 s->line_offset = line_offset;
1114 s->start_addr = start_addr;
1115 s->line_compare = line_compare;
1116 full_update = 1;
1117 }
1118 return full_update;
1119 }
1120
1121
1122 static const uint8_t cursor_glyph[32 * 4] = {
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 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1139 };
1140
1141 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1142 int *pcwidth, int *pcheight)
1143 {
1144 int width, cwidth, height, cheight;
1145
1146 /* total width & height */
1147 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1148 cwidth = 8;
1149 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1150 cwidth = 9;
1151 }
1152 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1153 cwidth = 16; /* NOTE: no 18 pixel wide */
1154 }
1155 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1156 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1157 /* ugly hack for CGA 160x100x16 - explain me the logic */
1158 height = 100;
1159 } else {
1160 height = s->cr[VGA_CRTC_V_DISP_END] |
1161 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1162 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1163 height = (height + 1) / cheight;
1164 }
1165
1166 *pwidth = width;
1167 *pheight = height;
1168 *pcwidth = cwidth;
1169 *pcheight = cheight;
1170 }
1171
1172 /*
1173 * Text mode update
1174 * Missing:
1175 * - double scan
1176 * - double width
1177 * - underline
1178 * - flashing
1179 */
1180 static void vga_draw_text(VGACommonState *s, int full_update)
1181 {
1182 DisplaySurface *surface = qemu_console_surface(s->con);
1183 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1184 int cx_min, cx_max, linesize, x_incr, line, line1;
1185 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1186 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1187 const uint8_t *font_ptr, *font_base[2];
1188 int dup9, line_offset;
1189 uint32_t *palette;
1190 uint32_t *ch_attr_ptr;
1191 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1192
1193 /* compute font data address (in plane 2) */
1194 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1195 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1196 if (offset != s->font_offsets[0]) {
1197 s->font_offsets[0] = offset;
1198 full_update = 1;
1199 }
1200 font_base[0] = s->vram_ptr + offset;
1201
1202 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1203 font_base[1] = s->vram_ptr + offset;
1204 if (offset != s->font_offsets[1]) {
1205 s->font_offsets[1] = offset;
1206 full_update = 1;
1207 }
1208 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1209 /* if the plane 2 was modified since the last display, it
1210 indicates the font may have been modified */
1211 s->plane_updated = 0;
1212 full_update = 1;
1213 }
1214 full_update |= update_basic_params(s);
1215
1216 line_offset = s->line_offset;
1217
1218 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1219 if ((height * width) <= 1) {
1220 /* better than nothing: exit if transient size is too small */
1221 return;
1222 }
1223 if ((height * width) > CH_ATTR_SIZE) {
1224 /* better than nothing: exit if transient size is too big */
1225 return;
1226 }
1227
1228 if (width != s->last_width || height != s->last_height ||
1229 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1230 s->last_scr_width = width * cw;
1231 s->last_scr_height = height * cheight;
1232 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1233 surface = qemu_console_surface(s->con);
1234 dpy_text_resize(s->con, width, height);
1235 s->last_depth = 0;
1236 s->last_width = width;
1237 s->last_height = height;
1238 s->last_ch = cheight;
1239 s->last_cw = cw;
1240 full_update = 1;
1241 }
1242 full_update |= update_palette16(s);
1243 palette = s->last_palette;
1244 x_incr = cw * surface_bytes_per_pixel(surface);
1245
1246 if (full_update) {
1247 s->full_update_text = 1;
1248 }
1249 if (s->full_update_gfx) {
1250 s->full_update_gfx = 0;
1251 full_update |= 1;
1252 }
1253
1254 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1255 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1256 if (cursor_offset != s->cursor_offset ||
1257 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1258 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1259 /* if the cursor position changed, we update the old and new
1260 chars */
1261 if (s->cursor_offset < CH_ATTR_SIZE)
1262 s->last_ch_attr[s->cursor_offset] = -1;
1263 if (cursor_offset < CH_ATTR_SIZE)
1264 s->last_ch_attr[cursor_offset] = -1;
1265 s->cursor_offset = cursor_offset;
1266 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1267 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1268 }
1269 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1270 if (now >= s->cursor_blink_time) {
1271 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1272 s->cursor_visible_phase = !s->cursor_visible_phase;
1273 }
1274
1275 dest = surface_data(surface);
1276 linesize = surface_stride(surface);
1277 ch_attr_ptr = s->last_ch_attr;
1278 line = 0;
1279 offset = s->start_addr * 4;
1280 for(cy = 0; cy < height; cy++) {
1281 d1 = dest;
1282 src = s->vram_ptr + offset;
1283 cx_min = width;
1284 cx_max = -1;
1285 for(cx = 0; cx < width; cx++) {
1286 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) {
1287 break;
1288 }
1289 ch_attr = *(uint16_t *)src;
1290 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1291 if (cx < cx_min)
1292 cx_min = cx;
1293 if (cx > cx_max)
1294 cx_max = cx;
1295 *ch_attr_ptr = ch_attr;
1296 #ifdef HOST_WORDS_BIGENDIAN
1297 ch = ch_attr >> 8;
1298 cattr = ch_attr & 0xff;
1299 #else
1300 ch = ch_attr & 0xff;
1301 cattr = ch_attr >> 8;
1302 #endif
1303 font_ptr = font_base[(cattr >> 3) & 1];
1304 font_ptr += 32 * 4 * ch;
1305 bgcol = palette[cattr >> 4];
1306 fgcol = palette[cattr & 0x0f];
1307 if (cw == 16) {
1308 vga_draw_glyph16(d1, linesize,
1309 font_ptr, cheight, fgcol, bgcol);
1310 } else if (cw != 9) {
1311 vga_draw_glyph8(d1, linesize,
1312 font_ptr, cheight, fgcol, bgcol);
1313 } else {
1314 dup9 = 0;
1315 if (ch >= 0xb0 && ch <= 0xdf &&
1316 (s->ar[VGA_ATC_MODE] & 0x04)) {
1317 dup9 = 1;
1318 }
1319 vga_draw_glyph9(d1, linesize,
1320 font_ptr, cheight, fgcol, bgcol, dup9);
1321 }
1322 if (src == cursor_ptr &&
1323 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1324 s->cursor_visible_phase) {
1325 int line_start, line_last, h;
1326 /* draw the cursor */
1327 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1328 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1329 /* XXX: check that */
1330 if (line_last > cheight - 1)
1331 line_last = cheight - 1;
1332 if (line_last >= line_start && line_start < cheight) {
1333 h = line_last - line_start + 1;
1334 d = d1 + linesize * line_start;
1335 if (cw == 16) {
1336 vga_draw_glyph16(d, linesize,
1337 cursor_glyph, h, fgcol, bgcol);
1338 } else if (cw != 9) {
1339 vga_draw_glyph8(d, linesize,
1340 cursor_glyph, h, fgcol, bgcol);
1341 } else {
1342 vga_draw_glyph9(d, linesize,
1343 cursor_glyph, h, fgcol, bgcol, 1);
1344 }
1345 }
1346 }
1347 }
1348 d1 += x_incr;
1349 src += 4;
1350 ch_attr_ptr++;
1351 }
1352 if (cx_max != -1) {
1353 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1354 (cx_max - cx_min + 1) * cw, cheight);
1355 }
1356 dest += linesize * cheight;
1357 line1 = line + cheight;
1358 offset += line_offset;
1359 if (line < s->line_compare && line1 >= s->line_compare) {
1360 offset = 0;
1361 }
1362 line = line1;
1363 }
1364 }
1365
1366 enum {
1367 VGA_DRAW_LINE2,
1368 VGA_DRAW_LINE2D2,
1369 VGA_DRAW_LINE4,
1370 VGA_DRAW_LINE4D2,
1371 VGA_DRAW_LINE8D2,
1372 VGA_DRAW_LINE8,
1373 VGA_DRAW_LINE15_LE,
1374 VGA_DRAW_LINE16_LE,
1375 VGA_DRAW_LINE24_LE,
1376 VGA_DRAW_LINE32_LE,
1377 VGA_DRAW_LINE15_BE,
1378 VGA_DRAW_LINE16_BE,
1379 VGA_DRAW_LINE24_BE,
1380 VGA_DRAW_LINE32_BE,
1381 VGA_DRAW_LINE_NB,
1382 };
1383
1384 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1385 vga_draw_line2,
1386 vga_draw_line2d2,
1387 vga_draw_line4,
1388 vga_draw_line4d2,
1389 vga_draw_line8d2,
1390 vga_draw_line8,
1391 vga_draw_line15_le,
1392 vga_draw_line16_le,
1393 vga_draw_line24_le,
1394 vga_draw_line32_le,
1395 vga_draw_line15_be,
1396 vga_draw_line16_be,
1397 vga_draw_line24_be,
1398 vga_draw_line32_be,
1399 };
1400
1401 static int vga_get_bpp(VGACommonState *s)
1402 {
1403 int ret;
1404
1405 if (vbe_enabled(s)) {
1406 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1407 } else {
1408 ret = 0;
1409 }
1410 return ret;
1411 }
1412
1413 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1414 {
1415 int width, height;
1416
1417 if (vbe_enabled(s)) {
1418 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1419 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1420 } else {
1421 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1422 height = s->cr[VGA_CRTC_V_DISP_END] |
1423 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1424 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1425 height = (height + 1);
1426 }
1427 *pwidth = width;
1428 *pheight = height;
1429 }
1430
1431 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1432 {
1433 int y;
1434 if (y1 >= VGA_MAX_HEIGHT)
1435 return;
1436 if (y2 >= VGA_MAX_HEIGHT)
1437 y2 = VGA_MAX_HEIGHT;
1438 for(y = y1; y < y2; y++) {
1439 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1440 }
1441 }
1442
1443 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1444 {
1445 if (y >= VGA_MAX_HEIGHT) {
1446 return false;
1447 }
1448 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1449 }
1450
1451 void vga_dirty_log_start(VGACommonState *s)
1452 {
1453 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1454 }
1455
1456 void vga_dirty_log_stop(VGACommonState *s)
1457 {
1458 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1459 }
1460
1461 /*
1462 * graphic modes
1463 */
1464 static void vga_draw_graphic(VGACommonState *s, int full_update)
1465 {
1466 DisplaySurface *surface = qemu_console_surface(s->con);
1467 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1468 int width, height, shift_control, bwidth, bits;
1469 ram_addr_t page0, page1, region_start, region_end;
1470 DirtyBitmapSnapshot *snap = NULL;
1471 int disp_width, multi_scan, multi_run;
1472 uint8_t *d;
1473 uint32_t v, addr1, addr;
1474 vga_draw_line_func *vga_draw_line = NULL;
1475 bool share_surface, force_shadow = false;
1476 pixman_format_code_t format;
1477 #ifdef HOST_WORDS_BIGENDIAN
1478 bool byteswap = !s->big_endian_fb;
1479 #else
1480 bool byteswap = s->big_endian_fb;
1481 #endif
1482
1483 full_update |= update_basic_params(s);
1484
1485 s->get_resolution(s, &width, &height);
1486 disp_width = width;
1487 depth = s->get_bpp(s);
1488
1489 region_start = (s->start_addr * 4);
1490 region_end = region_start + (ram_addr_t)s->line_offset * height;
1491 region_end += width * depth / 8; /* scanline length */
1492 region_end -= s->line_offset;
1493 if (region_end > s->vbe_size || depth == 0 || depth == 15) {
1494 /*
1495 * We land here on:
1496 * - wraps around (can happen with cirrus vbe modes)
1497 * - depth == 0 (256 color palette video mode)
1498 * - depth == 15
1499 *
1500 * Take the safe and slow route:
1501 * - create a dirty bitmap snapshot for all vga memory.
1502 * - force shadowing (so all vga memory access goes
1503 * through vga_read_*() helpers).
1504 *
1505 * Given this affects only vga features which are pretty much
1506 * unused by modern guests there should be no performance
1507 * impact.
1508 */
1509 region_start = 0;
1510 region_end = s->vbe_size;
1511 force_shadow = true;
1512 }
1513
1514 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1515 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1516 if (shift_control != 1) {
1517 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1518 - 1;
1519 } else {
1520 /* in CGA modes, multi_scan is ignored */
1521 /* XXX: is it correct ? */
1522 multi_scan = double_scan;
1523 }
1524 multi_run = multi_scan;
1525 if (shift_control != s->shift_control ||
1526 double_scan != s->double_scan) {
1527 full_update = 1;
1528 s->shift_control = shift_control;
1529 s->double_scan = double_scan;
1530 }
1531
1532 if (shift_control == 0) {
1533 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1534 disp_width <<= 1;
1535 }
1536 } else if (shift_control == 1) {
1537 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1538 disp_width <<= 1;
1539 }
1540 }
1541
1542 /*
1543 * Check whether we can share the surface with the backend
1544 * or whether we need a shadow surface. We share native
1545 * endian surfaces for 15bpp and above and byteswapped
1546 * surfaces for 24bpp and above.
1547 */
1548 format = qemu_default_pixman_format(depth, !byteswap);
1549 if (format) {
1550 share_surface = dpy_gfx_check_format(s->con, format)
1551 && !s->force_shadow && !force_shadow;
1552 } else {
1553 share_surface = false;
1554 }
1555
1556 if (s->line_offset != s->last_line_offset ||
1557 disp_width != s->last_width ||
1558 height != s->last_height ||
1559 s->last_depth != depth ||
1560 s->last_byteswap != byteswap ||
1561 share_surface != is_buffer_shared(surface)) {
1562 /* display parameters changed -> need new display surface */
1563 s->last_scr_width = disp_width;
1564 s->last_scr_height = height;
1565 s->last_width = disp_width;
1566 s->last_height = height;
1567 s->last_line_offset = s->line_offset;
1568 s->last_depth = depth;
1569 s->last_byteswap = byteswap;
1570 full_update = 1;
1571 }
1572 if (surface_data(surface) != s->vram_ptr + (s->start_addr * 4)
1573 && is_buffer_shared(surface)) {
1574 /* base address changed (page flip) -> shared display surfaces
1575 * must be updated with the new base address */
1576 full_update = 1;
1577 }
1578
1579 if (full_update) {
1580 if (share_surface) {
1581 surface = qemu_create_displaysurface_from(disp_width,
1582 height, format, s->line_offset,
1583 s->vram_ptr + (s->start_addr * 4));
1584 dpy_gfx_replace_surface(s->con, surface);
1585 } else {
1586 qemu_console_resize(s->con, disp_width, height);
1587 surface = qemu_console_surface(s->con);
1588 }
1589 }
1590
1591 if (shift_control == 0) {
1592 full_update |= update_palette16(s);
1593 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1594 v = VGA_DRAW_LINE4D2;
1595 } else {
1596 v = VGA_DRAW_LINE4;
1597 }
1598 bits = 4;
1599 } else if (shift_control == 1) {
1600 full_update |= update_palette16(s);
1601 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1602 v = VGA_DRAW_LINE2D2;
1603 } else {
1604 v = VGA_DRAW_LINE2;
1605 }
1606 bits = 4;
1607 } else {
1608 switch(s->get_bpp(s)) {
1609 default:
1610 case 0:
1611 full_update |= update_palette256(s);
1612 v = VGA_DRAW_LINE8D2;
1613 bits = 4;
1614 break;
1615 case 8:
1616 full_update |= update_palette256(s);
1617 v = VGA_DRAW_LINE8;
1618 bits = 8;
1619 break;
1620 case 15:
1621 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1622 bits = 16;
1623 break;
1624 case 16:
1625 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1626 bits = 16;
1627 break;
1628 case 24:
1629 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1630 bits = 24;
1631 break;
1632 case 32:
1633 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1634 bits = 32;
1635 break;
1636 }
1637 }
1638 vga_draw_line = vga_draw_line_table[v];
1639
1640 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1641 s->cursor_invalidate(s);
1642 }
1643
1644 #if 0
1645 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",
1646 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1647 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1648 #endif
1649 addr1 = (s->start_addr * 4);
1650 bwidth = DIV_ROUND_UP(width * bits, 8);
1651 y_start = -1;
1652 d = surface_data(surface);
1653 linesize = surface_stride(surface);
1654 y1 = 0;
1655
1656 if (!full_update) {
1657 if (s->line_compare < height) {
1658 /* split screen mode */
1659 region_start = 0;
1660 }
1661 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1662 region_end - region_start,
1663 DIRTY_MEMORY_VGA);
1664 }
1665
1666 for(y = 0; y < height; y++) {
1667 addr = addr1;
1668 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1669 int shift;
1670 /* CGA compatibility handling */
1671 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1672 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1673 }
1674 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1675 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1676 }
1677 update = full_update;
1678 page0 = addr & s->vbe_size_mask;
1679 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1680 if (full_update) {
1681 update = 1;
1682 } else if (page1 < page0) {
1683 /* scanline wraps from end of video memory to the start */
1684 assert(force_shadow);
1685 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1686 page0, s->vbe_size - page0);
1687 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1688 0, page1);
1689 } else {
1690 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1691 page0, page1 - page0);
1692 }
1693 /* explicit invalidation for the hardware cursor (cirrus only) */
1694 update |= vga_scanline_invalidated(s, y);
1695 if (update) {
1696 if (y_start < 0)
1697 y_start = y;
1698 if (!(is_buffer_shared(surface))) {
1699 vga_draw_line(s, d, addr, width);
1700 if (s->cursor_draw_line)
1701 s->cursor_draw_line(s, d, y);
1702 }
1703 } else {
1704 if (y_start >= 0) {
1705 /* flush to display */
1706 dpy_gfx_update(s->con, 0, y_start,
1707 disp_width, y - y_start);
1708 y_start = -1;
1709 }
1710 }
1711 if (!multi_run) {
1712 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1713 if ((y1 & mask) == mask)
1714 addr1 += s->line_offset;
1715 y1++;
1716 multi_run = multi_scan;
1717 } else {
1718 multi_run--;
1719 }
1720 /* line compare acts on the displayed lines */
1721 if (y == s->line_compare)
1722 addr1 = 0;
1723 d += linesize;
1724 }
1725 if (y_start >= 0) {
1726 /* flush to display */
1727 dpy_gfx_update(s->con, 0, y_start,
1728 disp_width, y - y_start);
1729 }
1730 g_free(snap);
1731 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1732 }
1733
1734 static void vga_draw_blank(VGACommonState *s, int full_update)
1735 {
1736 DisplaySurface *surface = qemu_console_surface(s->con);
1737 int i, w;
1738 uint8_t *d;
1739
1740 if (!full_update)
1741 return;
1742 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1743 return;
1744
1745 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1746 d = surface_data(surface);
1747 for(i = 0; i < s->last_scr_height; i++) {
1748 memset(d, 0, w);
1749 d += surface_stride(surface);
1750 }
1751 dpy_gfx_update_full(s->con);
1752 }
1753
1754 #define GMODE_TEXT 0
1755 #define GMODE_GRAPH 1
1756 #define GMODE_BLANK 2
1757
1758 static void vga_update_display(void *opaque)
1759 {
1760 VGACommonState *s = opaque;
1761 DisplaySurface *surface = qemu_console_surface(s->con);
1762 int full_update, graphic_mode;
1763
1764 qemu_flush_coalesced_mmio_buffer();
1765
1766 if (surface_bits_per_pixel(surface) == 0) {
1767 /* nothing to do */
1768 } else {
1769 full_update = 0;
1770 if (!(s->ar_index & 0x20)) {
1771 graphic_mode = GMODE_BLANK;
1772 } else {
1773 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1774 }
1775 if (graphic_mode != s->graphic_mode) {
1776 s->graphic_mode = graphic_mode;
1777 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1778 full_update = 1;
1779 }
1780 switch(graphic_mode) {
1781 case GMODE_TEXT:
1782 vga_draw_text(s, full_update);
1783 break;
1784 case GMODE_GRAPH:
1785 vga_draw_graphic(s, full_update);
1786 break;
1787 case GMODE_BLANK:
1788 default:
1789 vga_draw_blank(s, full_update);
1790 break;
1791 }
1792 }
1793 }
1794
1795 /* force a full display refresh */
1796 static void vga_invalidate_display(void *opaque)
1797 {
1798 VGACommonState *s = opaque;
1799
1800 s->last_width = -1;
1801 s->last_height = -1;
1802 }
1803
1804 void vga_common_reset(VGACommonState *s)
1805 {
1806 s->sr_index = 0;
1807 memset(s->sr, '\0', sizeof(s->sr));
1808 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1809 s->gr_index = 0;
1810 memset(s->gr, '\0', sizeof(s->gr));
1811 s->ar_index = 0;
1812 memset(s->ar, '\0', sizeof(s->ar));
1813 s->ar_flip_flop = 0;
1814 s->cr_index = 0;
1815 memset(s->cr, '\0', sizeof(s->cr));
1816 s->msr = 0;
1817 s->fcr = 0;
1818 s->st00 = 0;
1819 s->st01 = 0;
1820 s->dac_state = 0;
1821 s->dac_sub_index = 0;
1822 s->dac_read_index = 0;
1823 s->dac_write_index = 0;
1824 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1825 s->dac_8bit = 0;
1826 memset(s->palette, '\0', sizeof(s->palette));
1827 s->bank_offset = 0;
1828 s->vbe_index = 0;
1829 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1830 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1831 s->vbe_start_addr = 0;
1832 s->vbe_line_offset = 0;
1833 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1834 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1835 s->graphic_mode = -1; /* force full update */
1836 s->shift_control = 0;
1837 s->double_scan = 0;
1838 s->line_offset = 0;
1839 s->line_compare = 0;
1840 s->start_addr = 0;
1841 s->plane_updated = 0;
1842 s->last_cw = 0;
1843 s->last_ch = 0;
1844 s->last_width = 0;
1845 s->last_height = 0;
1846 s->last_scr_width = 0;
1847 s->last_scr_height = 0;
1848 s->cursor_start = 0;
1849 s->cursor_end = 0;
1850 s->cursor_offset = 0;
1851 s->big_endian_fb = s->default_endian_fb;
1852 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1853 memset(s->last_palette, '\0', sizeof(s->last_palette));
1854 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1855 switch (vga_retrace_method) {
1856 case VGA_RETRACE_DUMB:
1857 break;
1858 case VGA_RETRACE_PRECISE:
1859 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1860 break;
1861 }
1862 vga_update_memory_access(s);
1863 }
1864
1865 static void vga_reset(void *opaque)
1866 {
1867 VGACommonState *s = opaque;
1868 vga_common_reset(s);
1869 }
1870
1871 #define TEXTMODE_X(x) ((x) % width)
1872 #define TEXTMODE_Y(x) ((x) / width)
1873 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1874 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1875 /* relay text rendering to the display driver
1876 * instead of doing a full vga_update_display() */
1877 static void vga_update_text(void *opaque, console_ch_t *chardata)
1878 {
1879 VGACommonState *s = opaque;
1880 int graphic_mode, i, cursor_offset, cursor_visible;
1881 int cw, cheight, width, height, size, c_min, c_max;
1882 uint32_t *src;
1883 console_ch_t *dst, val;
1884 char msg_buffer[80];
1885 int full_update = 0;
1886
1887 qemu_flush_coalesced_mmio_buffer();
1888
1889 if (!(s->ar_index & 0x20)) {
1890 graphic_mode = GMODE_BLANK;
1891 } else {
1892 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1893 }
1894 if (graphic_mode != s->graphic_mode) {
1895 s->graphic_mode = graphic_mode;
1896 full_update = 1;
1897 }
1898 if (s->last_width == -1) {
1899 s->last_width = 0;
1900 full_update = 1;
1901 }
1902
1903 switch (graphic_mode) {
1904 case GMODE_TEXT:
1905 /* TODO: update palette */
1906 full_update |= update_basic_params(s);
1907
1908 /* total width & height */
1909 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1910 cw = 8;
1911 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1912 cw = 9;
1913 }
1914 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1915 cw = 16; /* NOTE: no 18 pixel wide */
1916 }
1917 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1918 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1919 /* ugly hack for CGA 160x100x16 - explain me the logic */
1920 height = 100;
1921 } else {
1922 height = s->cr[VGA_CRTC_V_DISP_END] |
1923 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1924 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1925 height = (height + 1) / cheight;
1926 }
1927
1928 size = (height * width);
1929 if (size > CH_ATTR_SIZE) {
1930 if (!full_update)
1931 return;
1932
1933 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1934 width, height);
1935 break;
1936 }
1937
1938 if (width != s->last_width || height != s->last_height ||
1939 cw != s->last_cw || cheight != s->last_ch) {
1940 s->last_scr_width = width * cw;
1941 s->last_scr_height = height * cheight;
1942 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1943 dpy_text_resize(s->con, width, height);
1944 s->last_depth = 0;
1945 s->last_width = width;
1946 s->last_height = height;
1947 s->last_ch = cheight;
1948 s->last_cw = cw;
1949 full_update = 1;
1950 }
1951
1952 if (full_update) {
1953 s->full_update_gfx = 1;
1954 }
1955 if (s->full_update_text) {
1956 s->full_update_text = 0;
1957 full_update |= 1;
1958 }
1959
1960 /* Update "hardware" cursor */
1961 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1962 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1963 if (cursor_offset != s->cursor_offset ||
1964 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1965 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1966 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1967 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1968 dpy_text_cursor(s->con,
1969 TEXTMODE_X(cursor_offset),
1970 TEXTMODE_Y(cursor_offset));
1971 else
1972 dpy_text_cursor(s->con, -1, -1);
1973 s->cursor_offset = cursor_offset;
1974 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1975 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1976 }
1977
1978 src = (uint32_t *) s->vram_ptr + s->start_addr;
1979 dst = chardata;
1980
1981 if (full_update) {
1982 for (i = 0; i < size; src ++, dst ++, i ++)
1983 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1984
1985 dpy_text_update(s->con, 0, 0, width, height);
1986 } else {
1987 c_max = 0;
1988
1989 for (i = 0; i < size; src ++, dst ++, i ++) {
1990 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1991 if (*dst != val) {
1992 *dst = val;
1993 c_max = i;
1994 break;
1995 }
1996 }
1997 c_min = i;
1998 for (; i < size; src ++, dst ++, i ++) {
1999 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2000 if (*dst != val) {
2001 *dst = val;
2002 c_max = i;
2003 }
2004 }
2005
2006 if (c_min <= c_max) {
2007 i = TEXTMODE_Y(c_min);
2008 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2009 }
2010 }
2011
2012 return;
2013 case GMODE_GRAPH:
2014 if (!full_update)
2015 return;
2016
2017 s->get_resolution(s, &width, &height);
2018 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2019 width, height);
2020 break;
2021 case GMODE_BLANK:
2022 default:
2023 if (!full_update)
2024 return;
2025
2026 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2027 break;
2028 }
2029
2030 /* Display a message */
2031 s->last_width = 60;
2032 s->last_height = height = 3;
2033 dpy_text_cursor(s->con, -1, -1);
2034 dpy_text_resize(s->con, s->last_width, height);
2035
2036 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2037 console_write_ch(dst ++, ' ');
2038
2039 size = strlen(msg_buffer);
2040 width = (s->last_width - size) / 2;
2041 dst = chardata + s->last_width + width;
2042 for (i = 0; i < size; i ++)
2043 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2044 QEMU_COLOR_BLACK, 1));
2045
2046 dpy_text_update(s->con, 0, 0, s->last_width, height);
2047 }
2048
2049 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2050 unsigned size)
2051 {
2052 VGACommonState *s = opaque;
2053
2054 return vga_mem_readb(s, addr);
2055 }
2056
2057 static void vga_mem_write(void *opaque, hwaddr addr,
2058 uint64_t data, unsigned size)
2059 {
2060 VGACommonState *s = opaque;
2061
2062 vga_mem_writeb(s, addr, data);
2063 }
2064
2065 const MemoryRegionOps vga_mem_ops = {
2066 .read = vga_mem_read,
2067 .write = vga_mem_write,
2068 .endianness = DEVICE_LITTLE_ENDIAN,
2069 .impl = {
2070 .min_access_size = 1,
2071 .max_access_size = 1,
2072 },
2073 };
2074
2075 static int vga_common_post_load(void *opaque, int version_id)
2076 {
2077 VGACommonState *s = opaque;
2078
2079 /* force refresh */
2080 s->graphic_mode = -1;
2081 vbe_update_vgaregs(s);
2082 vga_update_memory_access(s);
2083 return 0;
2084 }
2085
2086 static bool vga_endian_state_needed(void *opaque)
2087 {
2088 VGACommonState *s = opaque;
2089
2090 /*
2091 * Only send the endian state if it's different from the
2092 * default one, thus ensuring backward compatibility for
2093 * migration of the common case
2094 */
2095 return s->default_endian_fb != s->big_endian_fb;
2096 }
2097
2098 static const VMStateDescription vmstate_vga_endian = {
2099 .name = "vga.endian",
2100 .version_id = 1,
2101 .minimum_version_id = 1,
2102 .needed = vga_endian_state_needed,
2103 .fields = (VMStateField[]) {
2104 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2105 VMSTATE_END_OF_LIST()
2106 }
2107 };
2108
2109 const VMStateDescription vmstate_vga_common = {
2110 .name = "vga",
2111 .version_id = 2,
2112 .minimum_version_id = 2,
2113 .post_load = vga_common_post_load,
2114 .fields = (VMStateField[]) {
2115 VMSTATE_UINT32(latch, VGACommonState),
2116 VMSTATE_UINT8(sr_index, VGACommonState),
2117 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2118 VMSTATE_UINT8(gr_index, VGACommonState),
2119 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2120 VMSTATE_UINT8(ar_index, VGACommonState),
2121 VMSTATE_BUFFER(ar, VGACommonState),
2122 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2123 VMSTATE_UINT8(cr_index, VGACommonState),
2124 VMSTATE_BUFFER(cr, VGACommonState),
2125 VMSTATE_UINT8(msr, VGACommonState),
2126 VMSTATE_UINT8(fcr, VGACommonState),
2127 VMSTATE_UINT8(st00, VGACommonState),
2128 VMSTATE_UINT8(st01, VGACommonState),
2129
2130 VMSTATE_UINT8(dac_state, VGACommonState),
2131 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2132 VMSTATE_UINT8(dac_read_index, VGACommonState),
2133 VMSTATE_UINT8(dac_write_index, VGACommonState),
2134 VMSTATE_BUFFER(dac_cache, VGACommonState),
2135 VMSTATE_BUFFER(palette, VGACommonState),
2136
2137 VMSTATE_INT32(bank_offset, VGACommonState),
2138 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2139 VMSTATE_UINT16(vbe_index, VGACommonState),
2140 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2141 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2142 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2143 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2144 VMSTATE_END_OF_LIST()
2145 },
2146 .subsections = (const VMStateDescription*[]) {
2147 &vmstate_vga_endian,
2148 NULL
2149 }
2150 };
2151
2152 static const GraphicHwOps vga_ops = {
2153 .invalidate = vga_invalidate_display,
2154 .gfx_update = vga_update_display,
2155 .text_update = vga_update_text,
2156 };
2157
2158 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2159 {
2160 if (val < vmin) {
2161 return vmin;
2162 }
2163 if (val > vmax) {
2164 return vmax;
2165 }
2166 return val;
2167 }
2168
2169 void vga_common_init(VGACommonState *s, Object *obj)
2170 {
2171 int i, j, v, b;
2172
2173 for(i = 0;i < 256; i++) {
2174 v = 0;
2175 for(j = 0; j < 8; j++) {
2176 v |= ((i >> j) & 1) << (j * 4);
2177 }
2178 expand4[i] = v;
2179
2180 v = 0;
2181 for(j = 0; j < 4; j++) {
2182 v |= ((i >> (2 * j)) & 3) << (j * 4);
2183 }
2184 expand2[i] = v;
2185 }
2186 for(i = 0; i < 16; i++) {
2187 v = 0;
2188 for(j = 0; j < 4; j++) {
2189 b = ((i >> j) & 1);
2190 v |= b << (2 * j);
2191 v |= b << (2 * j + 1);
2192 }
2193 expand4to8[i] = v;
2194 }
2195
2196 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2197 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2198 s->vram_size = s->vram_size_mb * MiB;
2199
2200 if (!s->vbe_size) {
2201 s->vbe_size = s->vram_size;
2202 }
2203 s->vbe_size_mask = s->vbe_size - 1;
2204
2205 s->is_vbe_vmstate = 1;
2206 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2207 &error_fatal);
2208 vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj));
2209 xen_register_framebuffer(&s->vram);
2210 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2211 s->get_bpp = vga_get_bpp;
2212 s->get_offsets = vga_get_offsets;
2213 s->get_resolution = vga_get_resolution;
2214 s->hw_ops = &vga_ops;
2215 switch (vga_retrace_method) {
2216 case VGA_RETRACE_DUMB:
2217 s->retrace = vga_dumb_retrace;
2218 s->update_retrace_info = vga_dumb_update_retrace_info;
2219 break;
2220
2221 case VGA_RETRACE_PRECISE:
2222 s->retrace = vga_precise_retrace;
2223 s->update_retrace_info = vga_precise_update_retrace_info;
2224 break;
2225 }
2226
2227 /*
2228 * Set default fb endian based on target, could probably be turned
2229 * into a device attribute set by the machine/platform to remove
2230 * all target endian dependencies from this file.
2231 */
2232 #ifdef TARGET_WORDS_BIGENDIAN
2233 s->default_endian_fb = true;
2234 #else
2235 s->default_endian_fb = false;
2236 #endif
2237 vga_dirty_log_start(s);
2238 }
2239
2240 static const MemoryRegionPortio vga_portio_list[] = {
2241 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2242 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2243 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2244 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2245 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2246 PORTIO_END_OF_LIST(),
2247 };
2248
2249 static const MemoryRegionPortio vbe_portio_list[] = {
2250 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2251 # ifdef TARGET_I386
2252 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2253 # endif
2254 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2255 PORTIO_END_OF_LIST(),
2256 };
2257
2258 /* Used by both ISA and PCI */
2259 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2260 const MemoryRegionPortio **vga_ports,
2261 const MemoryRegionPortio **vbe_ports)
2262 {
2263 MemoryRegion *vga_mem;
2264
2265 *vga_ports = vga_portio_list;
2266 *vbe_ports = vbe_portio_list;
2267
2268 vga_mem = g_malloc(sizeof(*vga_mem));
2269 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2270 "vga-lowmem", 0x20000);
2271 memory_region_set_flush_coalesced(vga_mem);
2272
2273 return vga_mem;
2274 }
2275
2276 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2277 MemoryRegion *address_space_io, bool init_vga_ports)
2278 {
2279 MemoryRegion *vga_io_memory;
2280 const MemoryRegionPortio *vga_ports, *vbe_ports;
2281
2282 qemu_register_reset(vga_reset, s);
2283
2284 s->bank_offset = 0;
2285
2286 s->legacy_address_space = address_space;
2287
2288 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2289 memory_region_add_subregion_overlap(address_space,
2290 0x000a0000,
2291 vga_io_memory,
2292 1);
2293 memory_region_set_coalescing(vga_io_memory);
2294 if (init_vga_ports) {
2295 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2296 portio_list_set_flush_coalesced(&s->vga_port_list);
2297 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2298 }
2299 if (vbe_ports) {
2300 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2301 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2302 }
2303 }
AR7 emulation for QEMU