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vga: Allow writing VBE_DISPI_ID5 to ID register
[qemu/ar7.git] / hw / display / vga.c
blob9d1f66af402e54103033dc90c6589339fd199d8e
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 bool have_vga = true;
43
44 /* 16 state changes per vertical frame @60 Hz */
45 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
46
47 /*
48 * Video Graphics Array (VGA)
49 *
50 * Chipset docs for original IBM VGA:
51 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
52 *
53 * FreeVGA site:
54 * http://www.osdever.net/FreeVGA/home.htm
55 *
56 * Standard VGA features and Bochs VBE extensions are implemented.
57 */
58
59 /* force some bits to zero */
60 const uint8_t sr_mask[8] = {
61 0x03,
62 0x3d,
63 0x0f,
64 0x3f,
65 0x0e,
66 0x00,
67 0x00,
68 0xff,
69 };
70
71 const uint8_t gr_mask[16] = {
72 0x0f, /* 0x00 */
73 0x0f, /* 0x01 */
74 0x0f, /* 0x02 */
75 0x1f, /* 0x03 */
76 0x03, /* 0x04 */
77 0x7b, /* 0x05 */
78 0x0f, /* 0x06 */
79 0x0f, /* 0x07 */
80 0xff, /* 0x08 */
81 0x00, /* 0x09 */
82 0x00, /* 0x0a */
83 0x00, /* 0x0b */
84 0x00, /* 0x0c */
85 0x00, /* 0x0d */
86 0x00, /* 0x0e */
87 0x00, /* 0x0f */
88 };
89
90 #define cbswap_32(__x) \
91 ((uint32_t)( \
92 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
93 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
94 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
95 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
96
97 #ifdef HOST_WORDS_BIGENDIAN
98 #define PAT(x) cbswap_32(x)
99 #else
100 #define PAT(x) (x)
101 #endif
102
103 #ifdef HOST_WORDS_BIGENDIAN
104 #define BIG 1
105 #else
106 #define BIG 0
107 #endif
108
109 #ifdef HOST_WORDS_BIGENDIAN
110 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
111 #else
112 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
113 #endif
114
115 static const uint32_t mask16[16] = {
116 PAT(0x00000000),
117 PAT(0x000000ff),
118 PAT(0x0000ff00),
119 PAT(0x0000ffff),
120 PAT(0x00ff0000),
121 PAT(0x00ff00ff),
122 PAT(0x00ffff00),
123 PAT(0x00ffffff),
124 PAT(0xff000000),
125 PAT(0xff0000ff),
126 PAT(0xff00ff00),
127 PAT(0xff00ffff),
128 PAT(0xffff0000),
129 PAT(0xffff00ff),
130 PAT(0xffffff00),
131 PAT(0xffffffff),
132 };
133
134 #undef PAT
135
136 #ifdef HOST_WORDS_BIGENDIAN
137 #define PAT(x) (x)
138 #else
139 #define PAT(x) cbswap_32(x)
140 #endif
141
142 static uint32_t expand4[256];
143 static uint16_t expand2[256];
144 static uint8_t expand4to8[16];
145
146 static void vbe_update_vgaregs(VGACommonState *s);
147
148 static inline bool vbe_enabled(VGACommonState *s)
149 {
150 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
151 }
152
153 static inline uint8_t sr(VGACommonState *s, int idx)
154 {
155 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
156 }
157
158 static void vga_update_memory_access(VGACommonState *s)
159 {
160 hwaddr base, offset, size;
161
162 if (s->legacy_address_space == NULL) {
163 return;
164 }
165
166 if (s->has_chain4_alias) {
167 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
168 object_unparent(OBJECT(&s->chain4_alias));
169 s->has_chain4_alias = false;
170 s->plane_updated = 0xf;
171 }
172 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
173 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
174 offset = 0;
175 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
176 case 0:
177 base = 0xa0000;
178 size = 0x20000;
179 break;
180 case 1:
181 base = 0xa0000;
182 size = 0x10000;
183 offset = s->bank_offset;
184 break;
185 case 2:
186 base = 0xb0000;
187 size = 0x8000;
188 break;
189 case 3:
190 default:
191 base = 0xb8000;
192 size = 0x8000;
193 break;
194 }
195 assert(offset + size <= s->vram_size);
196 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
197 "vga.chain4", &s->vram, offset, size);
198 memory_region_add_subregion_overlap(s->legacy_address_space, base,
199 &s->chain4_alias, 2);
200 s->has_chain4_alias = true;
201 }
202 }
203
204 static void vga_dumb_update_retrace_info(VGACommonState *s)
205 {
206 (void) s;
207 }
208
209 static void vga_precise_update_retrace_info(VGACommonState *s)
210 {
211 int htotal_chars;
212 int hretr_start_char;
213 int hretr_skew_chars;
214 int hretr_end_char;
215
216 int vtotal_lines;
217 int vretr_start_line;
218 int vretr_end_line;
219
220 int dots;
221 #if 0
222 int div2, sldiv2;
223 #endif
224 int clocking_mode;
225 int clock_sel;
226 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
227 int64_t chars_per_sec;
228 struct vga_precise_retrace *r = &s->retrace_info.precise;
229
230 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
231 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
232 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
233 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
234
235 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
236 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
237 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
238 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
239 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
240 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
241 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
242
243 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
244 clock_sel = (s->msr >> 2) & 3;
245 dots = (s->msr & 1) ? 8 : 9;
246
247 chars_per_sec = clk_hz[clock_sel] / dots;
248
249 htotal_chars <<= clocking_mode;
250
251 r->total_chars = vtotal_lines * htotal_chars;
252 if (r->freq) {
253 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
254 } else {
255 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
256 }
257
258 r->vstart = vretr_start_line;
259 r->vend = r->vstart + vretr_end_line + 1;
260
261 r->hstart = hretr_start_char + hretr_skew_chars;
262 r->hend = r->hstart + hretr_end_char + 1;
263 r->htotal = htotal_chars;
264
265 #if 0
266 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
267 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
268 printf (
269 "hz=%f\n"
270 "htotal = %d\n"
271 "hretr_start = %d\n"
272 "hretr_skew = %d\n"
273 "hretr_end = %d\n"
274 "vtotal = %d\n"
275 "vretr_start = %d\n"
276 "vretr_end = %d\n"
277 "div2 = %d sldiv2 = %d\n"
278 "clocking_mode = %d\n"
279 "clock_sel = %d %d\n"
280 "dots = %d\n"
281 "ticks/char = %" PRId64 "\n"
282 "\n",
283 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
284 htotal_chars,
285 hretr_start_char,
286 hretr_skew_chars,
287 hretr_end_char,
288 vtotal_lines,
289 vretr_start_line,
290 vretr_end_line,
291 div2, sldiv2,
292 clocking_mode,
293 clock_sel,
294 clk_hz[clock_sel],
295 dots,
296 r->ticks_per_char
297 );
298 #endif
299 }
300
301 static uint8_t vga_precise_retrace(VGACommonState *s)
302 {
303 struct vga_precise_retrace *r = &s->retrace_info.precise;
304 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
305
306 if (r->total_chars) {
307 int cur_line, cur_line_char, cur_char;
308 int64_t cur_tick;
309
310 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
311
312 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
313 cur_line = cur_char / r->htotal;
314
315 if (cur_line >= r->vstart && cur_line <= r->vend) {
316 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
317 } else {
318 cur_line_char = cur_char % r->htotal;
319 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
320 val |= ST01_DISP_ENABLE;
321 }
322 }
323
324 return val;
325 } else {
326 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
327 }
328 }
329
330 static uint8_t vga_dumb_retrace(VGACommonState *s)
331 {
332 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
333 }
334
335 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
336 {
337 if (s->msr & VGA_MIS_COLOR) {
338 /* Color */
339 return (addr >= 0x3b0 && addr <= 0x3bf);
340 } else {
341 /* Monochrome */
342 return (addr >= 0x3d0 && addr <= 0x3df);
343 }
344 }
345
346 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
347 {
348 VGACommonState *s = opaque;
349 int val, index;
350
351 if (vga_ioport_invalid(s, addr)) {
352 val = 0xff;
353 } else {
354 switch(addr) {
355 case VGA_ATT_W:
356 if (s->ar_flip_flop == 0) {
357 val = s->ar_index;
358 } else {
359 val = 0;
360 }
361 break;
362 case VGA_ATT_R:
363 index = s->ar_index & 0x1f;
364 if (index < VGA_ATT_C) {
365 val = s->ar[index];
366 } else {
367 val = 0;
368 }
369 break;
370 case VGA_MIS_W:
371 val = s->st00;
372 break;
373 case VGA_SEQ_I:
374 val = s->sr_index;
375 break;
376 case VGA_SEQ_D:
377 val = s->sr[s->sr_index];
378 #ifdef DEBUG_VGA_REG
379 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
380 #endif
381 break;
382 case VGA_PEL_IR:
383 val = s->dac_state;
384 break;
385 case VGA_PEL_IW:
386 val = s->dac_write_index;
387 break;
388 case VGA_PEL_D:
389 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
390 if (++s->dac_sub_index == 3) {
391 s->dac_sub_index = 0;
392 s->dac_read_index++;
393 }
394 break;
395 case VGA_FTC_R:
396 val = s->fcr;
397 break;
398 case VGA_MIS_R:
399 val = s->msr;
400 break;
401 case VGA_GFX_I:
402 val = s->gr_index;
403 break;
404 case VGA_GFX_D:
405 val = s->gr[s->gr_index];
406 #ifdef DEBUG_VGA_REG
407 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
408 #endif
409 break;
410 case VGA_CRT_IM:
411 case VGA_CRT_IC:
412 val = s->cr_index;
413 break;
414 case VGA_CRT_DM:
415 case VGA_CRT_DC:
416 val = s->cr[s->cr_index];
417 #ifdef DEBUG_VGA_REG
418 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
419 #endif
420 break;
421 case VGA_IS1_RM:
422 case VGA_IS1_RC:
423 /* just toggle to fool polling */
424 val = s->st01 = s->retrace(s);
425 s->ar_flip_flop = 0;
426 break;
427 default:
428 val = 0x00;
429 break;
430 }
431 }
432 trace_vga_std_read_io(addr, val);
433 return val;
434 }
435
436 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
437 {
438 VGACommonState *s = opaque;
439 int index;
440
441 /* check port range access depending on color/monochrome mode */
442 if (vga_ioport_invalid(s, addr)) {
443 return;
444 }
445 trace_vga_std_write_io(addr, val);
446
447 switch(addr) {
448 case VGA_ATT_W:
449 if (s->ar_flip_flop == 0) {
450 val &= 0x3f;
451 s->ar_index = val;
452 } else {
453 index = s->ar_index & 0x1f;
454 switch(index) {
455 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
456 s->ar[index] = val & 0x3f;
457 break;
458 case VGA_ATC_MODE:
459 s->ar[index] = val & ~0x10;
460 break;
461 case VGA_ATC_OVERSCAN:
462 s->ar[index] = val;
463 break;
464 case VGA_ATC_PLANE_ENABLE:
465 s->ar[index] = val & ~0xc0;
466 break;
467 case VGA_ATC_PEL:
468 s->ar[index] = val & ~0xf0;
469 break;
470 case VGA_ATC_COLOR_PAGE:
471 s->ar[index] = val & ~0xf0;
472 break;
473 default:
474 break;
475 }
476 }
477 s->ar_flip_flop ^= 1;
478 break;
479 case VGA_MIS_W:
480 s->msr = val & ~0x10;
481 s->update_retrace_info(s);
482 break;
483 case VGA_SEQ_I:
484 s->sr_index = val & 7;
485 break;
486 case VGA_SEQ_D:
487 #ifdef DEBUG_VGA_REG
488 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
489 #endif
490 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
491 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
492 s->update_retrace_info(s);
493 }
494 vga_update_memory_access(s);
495 break;
496 case VGA_PEL_IR:
497 s->dac_read_index = val;
498 s->dac_sub_index = 0;
499 s->dac_state = 3;
500 break;
501 case VGA_PEL_IW:
502 s->dac_write_index = val;
503 s->dac_sub_index = 0;
504 s->dac_state = 0;
505 break;
506 case VGA_PEL_D:
507 s->dac_cache[s->dac_sub_index] = val;
508 if (++s->dac_sub_index == 3) {
509 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
510 s->dac_sub_index = 0;
511 s->dac_write_index++;
512 }
513 break;
514 case VGA_GFX_I:
515 s->gr_index = val & 0x0f;
516 break;
517 case VGA_GFX_D:
518 #ifdef DEBUG_VGA_REG
519 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
520 #endif
521 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
522 vbe_update_vgaregs(s);
523 vga_update_memory_access(s);
524 break;
525 case VGA_CRT_IM:
526 case VGA_CRT_IC:
527 s->cr_index = val;
528 break;
529 case VGA_CRT_DM:
530 case VGA_CRT_DC:
531 #ifdef DEBUG_VGA_REG
532 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
533 #endif
534 /* handle CR0-7 protection */
535 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
536 s->cr_index <= VGA_CRTC_OVERFLOW) {
537 /* can always write bit 4 of CR7 */
538 if (s->cr_index == VGA_CRTC_OVERFLOW) {
539 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
540 (val & 0x10);
541 vbe_update_vgaregs(s);
542 }
543 return;
544 }
545 s->cr[s->cr_index] = val;
546 vbe_update_vgaregs(s);
547
548 switch(s->cr_index) {
549 case VGA_CRTC_H_TOTAL:
550 case VGA_CRTC_H_SYNC_START:
551 case VGA_CRTC_H_SYNC_END:
552 case VGA_CRTC_V_TOTAL:
553 case VGA_CRTC_OVERFLOW:
554 case VGA_CRTC_V_SYNC_END:
555 case VGA_CRTC_MODE:
556 s->update_retrace_info(s);
557 break;
558 }
559 break;
560 case VGA_IS1_RM:
561 case VGA_IS1_RC:
562 s->fcr = val & 0x10;
563 break;
564 }
565 }
566
567 /*
568 * Sanity check vbe register writes.
569 *
570 * As we don't have a way to signal errors to the guest in the bochs
571 * dispi interface we'll go adjust the registers to the closest valid
572 * value.
573 */
574 static void vbe_fixup_regs(VGACommonState *s)
575 {
576 uint16_t *r = s->vbe_regs;
577 uint32_t bits, linelength, maxy, offset;
578
579 if (!vbe_enabled(s)) {
580 /* vbe is turned off -- nothing to do */
581 return;
582 }
583
584 /* check depth */
585 switch (r[VBE_DISPI_INDEX_BPP]) {
586 case 4:
587 case 8:
588 case 16:
589 case 24:
590 case 32:
591 bits = r[VBE_DISPI_INDEX_BPP];
592 break;
593 case 15:
594 bits = 16;
595 break;
596 default:
597 bits = r[VBE_DISPI_INDEX_BPP] = 8;
598 break;
599 }
600
601 /* check width */
602 r[VBE_DISPI_INDEX_XRES] &= ~7u;
603 if (r[VBE_DISPI_INDEX_XRES] == 0) {
604 r[VBE_DISPI_INDEX_XRES] = 8;
605 }
606 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
607 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
608 }
609 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
610 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
611 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
612 }
613 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
614 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
615 }
616
617 /* check height */
618 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
619 maxy = s->vbe_size / linelength;
620 if (r[VBE_DISPI_INDEX_YRES] == 0) {
621 r[VBE_DISPI_INDEX_YRES] = 1;
622 }
623 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
624 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
625 }
626 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
627 r[VBE_DISPI_INDEX_YRES] = maxy;
628 }
629
630 /* check offset */
631 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
632 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
633 }
634 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
635 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
636 }
637 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
638 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
639 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
640 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
641 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
642 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
643 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
644 offset = 0;
645 }
646 }
647
648 /* update vga state */
649 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
650 s->vbe_line_offset = linelength;
651 s->vbe_start_addr = offset / 4;
652 }
653
654 /* we initialize the VGA graphic mode */
655 static void vbe_update_vgaregs(VGACommonState *s)
656 {
657 int h, shift_control;
658
659 if (!vbe_enabled(s)) {
660 /* vbe is turned off -- nothing to do */
661 return;
662 }
663
664 /* graphic mode + memory map 1 */
665 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
666 VGA_GR06_GRAPHICS_MODE;
667 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
668 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
669 /* width */
670 s->cr[VGA_CRTC_H_DISP] =
671 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
672 /* height (only meaningful if < 1024) */
673 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
674 s->cr[VGA_CRTC_V_DISP_END] = h;
675 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
676 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
677 /* line compare to 1023 */
678 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
679 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
680 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
681
682 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
683 shift_control = 0;
684 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
685 } else {
686 shift_control = 2;
687 /* set chain 4 mode */
688 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
689 /* activate all planes */
690 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
691 }
692 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
693 (shift_control << 5);
694 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
695 }
696
697 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
698 {
699 VGACommonState *s = opaque;
700 return s->vbe_index;
701 }
702
703 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
704 {
705 VGACommonState *s = opaque;
706 uint32_t val;
707
708 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
709 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
710 switch(s->vbe_index) {
711 /* XXX: do not hardcode ? */
712 case VBE_DISPI_INDEX_XRES:
713 val = VBE_DISPI_MAX_XRES;
714 break;
715 case VBE_DISPI_INDEX_YRES:
716 val = VBE_DISPI_MAX_YRES;
717 break;
718 case VBE_DISPI_INDEX_BPP:
719 val = VBE_DISPI_MAX_BPP;
720 break;
721 default:
722 val = s->vbe_regs[s->vbe_index];
723 break;
724 }
725 } else {
726 val = s->vbe_regs[s->vbe_index];
727 }
728 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
729 val = s->vbe_size / (64 * KiB);
730 } else {
731 val = 0;
732 }
733 trace_vga_vbe_read(s->vbe_index, val);
734 return val;
735 }
736
737 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
738 {
739 VGACommonState *s = opaque;
740 s->vbe_index = val;
741 }
742
743 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
744 {
745 VGACommonState *s = opaque;
746
747 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
748 trace_vga_vbe_write(s->vbe_index, val);
749 switch(s->vbe_index) {
750 case VBE_DISPI_INDEX_ID:
751 if (val == VBE_DISPI_ID0 ||
752 val == VBE_DISPI_ID1 ||
753 val == VBE_DISPI_ID2 ||
754 val == VBE_DISPI_ID3 ||
755 val == VBE_DISPI_ID4 ||
756 val == VBE_DISPI_ID5) {
757 s->vbe_regs[s->vbe_index] = val;
758 }
759 break;
760 case VBE_DISPI_INDEX_XRES:
761 case VBE_DISPI_INDEX_YRES:
762 case VBE_DISPI_INDEX_BPP:
763 case VBE_DISPI_INDEX_VIRT_WIDTH:
764 case VBE_DISPI_INDEX_X_OFFSET:
765 case VBE_DISPI_INDEX_Y_OFFSET:
766 s->vbe_regs[s->vbe_index] = val;
767 vbe_fixup_regs(s);
768 vbe_update_vgaregs(s);
769 break;
770 case VBE_DISPI_INDEX_BANK:
771 val &= s->vbe_bank_mask;
772 s->vbe_regs[s->vbe_index] = val;
773 s->bank_offset = (val << 16);
774 vga_update_memory_access(s);
775 break;
776 case VBE_DISPI_INDEX_ENABLE:
777 if ((val & VBE_DISPI_ENABLED) &&
778 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
779
780 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
781 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
782 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
783 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
784 vbe_fixup_regs(s);
785 vbe_update_vgaregs(s);
786
787 /* clear the screen */
788 if (!(val & VBE_DISPI_NOCLEARMEM)) {
789 memset(s->vram_ptr, 0,
790 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
791 }
792 } else {
793 s->bank_offset = 0;
794 }
795 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
796 s->vbe_regs[s->vbe_index] = val;
797 vga_update_memory_access(s);
798 break;
799 default:
800 break;
801 }
802 }
803 }
804
805 /* called for accesses between 0xa0000 and 0xc0000 */
806 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
807 {
808 int memory_map_mode, plane;
809 uint32_t ret;
810
811 /* convert to VGA memory offset */
812 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
813 addr &= 0x1ffff;
814 switch(memory_map_mode) {
815 case 0:
816 break;
817 case 1:
818 if (addr >= 0x10000)
819 return 0xff;
820 addr += s->bank_offset;
821 break;
822 case 2:
823 addr -= 0x10000;
824 if (addr >= 0x8000)
825 return 0xff;
826 break;
827 default:
828 case 3:
829 addr -= 0x18000;
830 if (addr >= 0x8000)
831 return 0xff;
832 break;
833 }
834
835 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
836 /* chain 4 mode : simplest access */
837 assert(addr < s->vram_size);
838 ret = s->vram_ptr[addr];
839 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
840 /* odd/even mode (aka text mode mapping) */
841 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
842 addr = ((addr & ~1) << 1) | plane;
843 if (addr >= s->vram_size) {
844 return 0xff;
845 }
846 ret = s->vram_ptr[addr];
847 } else {
848 /* standard VGA latched access */
849 if (addr * sizeof(uint32_t) >= s->vram_size) {
850 return 0xff;
851 }
852 s->latch = ((uint32_t *)s->vram_ptr)[addr];
853
854 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
855 /* read mode 0 */
856 plane = s->gr[VGA_GFX_PLANE_READ];
857 ret = GET_PLANE(s->latch, plane);
858 } else {
859 /* read mode 1 */
860 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
861 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
862 ret |= ret >> 16;
863 ret |= ret >> 8;
864 ret = (~ret) & 0xff;
865 }
866 }
867 return ret;
868 }
869
870 /* called for accesses between 0xa0000 and 0xc0000 */
871 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
872 {
873 int memory_map_mode, plane, write_mode, b, func_select, mask;
874 uint32_t write_mask, bit_mask, set_mask;
875
876 #ifdef DEBUG_VGA_MEM
877 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
878 #endif
879 /* convert to VGA memory offset */
880 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
881 addr &= 0x1ffff;
882 switch(memory_map_mode) {
883 case 0:
884 break;
885 case 1:
886 if (addr >= 0x10000)
887 return;
888 addr += s->bank_offset;
889 break;
890 case 2:
891 addr -= 0x10000;
892 if (addr >= 0x8000)
893 return;
894 break;
895 default:
896 case 3:
897 addr -= 0x18000;
898 if (addr >= 0x8000)
899 return;
900 break;
901 }
902
903 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
904 /* chain 4 mode : simplest access */
905 plane = addr & 3;
906 mask = (1 << plane);
907 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
908 assert(addr < s->vram_size);
909 s->vram_ptr[addr] = val;
910 #ifdef DEBUG_VGA_MEM
911 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
912 #endif
913 s->plane_updated |= mask; /* only used to detect font change */
914 memory_region_set_dirty(&s->vram, addr, 1);
915 }
916 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
917 /* odd/even mode (aka text mode mapping) */
918 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
919 mask = (1 << plane);
920 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
921 addr = ((addr & ~1) << 1) | plane;
922 if (addr >= s->vram_size) {
923 return;
924 }
925 s->vram_ptr[addr] = val;
926 #ifdef DEBUG_VGA_MEM
927 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
928 #endif
929 s->plane_updated |= mask; /* only used to detect font change */
930 memory_region_set_dirty(&s->vram, addr, 1);
931 }
932 } else {
933 /* standard VGA latched access */
934 write_mode = s->gr[VGA_GFX_MODE] & 3;
935 switch(write_mode) {
936 default:
937 case 0:
938 /* rotate */
939 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
940 val = ((val >> b) | (val << (8 - b))) & 0xff;
941 val |= val << 8;
942 val |= val << 16;
943
944 /* apply set/reset mask */
945 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
946 val = (val & ~set_mask) |
947 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
948 bit_mask = s->gr[VGA_GFX_BIT_MASK];
949 break;
950 case 1:
951 val = s->latch;
952 goto do_write;
953 case 2:
954 val = mask16[val & 0x0f];
955 bit_mask = s->gr[VGA_GFX_BIT_MASK];
956 break;
957 case 3:
958 /* rotate */
959 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
960 val = (val >> b) | (val << (8 - b));
961
962 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
963 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
964 break;
965 }
966
967 /* apply logical operation */
968 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
969 switch(func_select) {
970 case 0:
971 default:
972 /* nothing to do */
973 break;
974 case 1:
975 /* and */
976 val &= s->latch;
977 break;
978 case 2:
979 /* or */
980 val |= s->latch;
981 break;
982 case 3:
983 /* xor */
984 val ^= s->latch;
985 break;
986 }
987
988 /* apply bit mask */
989 bit_mask |= bit_mask << 8;
990 bit_mask |= bit_mask << 16;
991 val = (val & bit_mask) | (s->latch & ~bit_mask);
992
993 do_write:
994 /* mask data according to sr[2] */
995 mask = sr(s, VGA_SEQ_PLANE_WRITE);
996 s->plane_updated |= mask; /* only used to detect font change */
997 write_mask = mask16[mask];
998 if (addr * sizeof(uint32_t) >= s->vram_size) {
999 return;
1000 }
1001 ((uint32_t *)s->vram_ptr)[addr] =
1002 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
1003 (val & write_mask);
1004 #ifdef DEBUG_VGA_MEM
1005 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1006 addr * 4, write_mask, val);
1007 #endif
1008 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1009 }
1010 }
1011
1012 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1013 uint32_t srcaddr, int width);
1014
1015 #include "vga-access.h"
1016 #include "vga-helpers.h"
1017
1018 /* return true if the palette was modified */
1019 static int update_palette16(VGACommonState *s)
1020 {
1021 int full_update, i;
1022 uint32_t v, col, *palette;
1023
1024 full_update = 0;
1025 palette = s->last_palette;
1026 for(i = 0; i < 16; i++) {
1027 v = s->ar[i];
1028 if (s->ar[VGA_ATC_MODE] & 0x80) {
1029 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1030 } else {
1031 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1032 }
1033 v = v * 3;
1034 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1035 c6_to_8(s->palette[v + 1]),
1036 c6_to_8(s->palette[v + 2]));
1037 if (col != palette[i]) {
1038 full_update = 1;
1039 palette[i] = col;
1040 }
1041 }
1042 return full_update;
1043 }
1044
1045 /* return true if the palette was modified */
1046 static int update_palette256(VGACommonState *s)
1047 {
1048 int full_update, i;
1049 uint32_t v, col, *palette;
1050
1051 full_update = 0;
1052 palette = s->last_palette;
1053 v = 0;
1054 for(i = 0; i < 256; i++) {
1055 if (s->dac_8bit) {
1056 col = rgb_to_pixel32(s->palette[v],
1057 s->palette[v + 1],
1058 s->palette[v + 2]);
1059 } else {
1060 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1061 c6_to_8(s->palette[v + 1]),
1062 c6_to_8(s->palette[v + 2]));
1063 }
1064 if (col != palette[i]) {
1065 full_update = 1;
1066 palette[i] = col;
1067 }
1068 v += 3;
1069 }
1070 return full_update;
1071 }
1072
1073 static void vga_get_offsets(VGACommonState *s,
1074 uint32_t *pline_offset,
1075 uint32_t *pstart_addr,
1076 uint32_t *pline_compare)
1077 {
1078 uint32_t start_addr, line_offset, line_compare;
1079
1080 if (vbe_enabled(s)) {
1081 line_offset = s->vbe_line_offset;
1082 start_addr = s->vbe_start_addr;
1083 line_compare = 65535;
1084 } else {
1085 /* compute line_offset in bytes */
1086 line_offset = s->cr[VGA_CRTC_OFFSET];
1087 line_offset <<= 3;
1088
1089 /* starting address */
1090 start_addr = s->cr[VGA_CRTC_START_LO] |
1091 (s->cr[VGA_CRTC_START_HI] << 8);
1092
1093 /* line compare */
1094 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1095 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1096 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1097 }
1098 *pline_offset = line_offset;
1099 *pstart_addr = start_addr;
1100 *pline_compare = line_compare;
1101 }
1102
1103 /* update start_addr and line_offset. Return TRUE if modified */
1104 static int update_basic_params(VGACommonState *s)
1105 {
1106 int full_update;
1107 uint32_t start_addr, line_offset, line_compare;
1108
1109 full_update = 0;
1110
1111 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1112
1113 if (line_offset != s->line_offset ||
1114 start_addr != s->start_addr ||
1115 line_compare != s->line_compare) {
1116 s->line_offset = line_offset;
1117 s->start_addr = start_addr;
1118 s->line_compare = line_compare;
1119 full_update = 1;
1120 }
1121 return full_update;
1122 }
1123
1124
1125 static const uint8_t cursor_glyph[32 * 4] = {
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 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1142 };
1143
1144 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1145 int *pcwidth, int *pcheight)
1146 {
1147 int width, cwidth, height, cheight;
1148
1149 /* total width & height */
1150 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1151 cwidth = 8;
1152 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1153 cwidth = 9;
1154 }
1155 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1156 cwidth = 16; /* NOTE: no 18 pixel wide */
1157 }
1158 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1159 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1160 /* ugly hack for CGA 160x100x16 - explain me the logic */
1161 height = 100;
1162 } else {
1163 height = s->cr[VGA_CRTC_V_DISP_END] |
1164 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1165 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1166 height = (height + 1) / cheight;
1167 }
1168
1169 *pwidth = width;
1170 *pheight = height;
1171 *pcwidth = cwidth;
1172 *pcheight = cheight;
1173 }
1174
1175 /*
1176 * Text mode update
1177 * Missing:
1178 * - double scan
1179 * - double width
1180 * - underline
1181 * - flashing
1182 */
1183 static void vga_draw_text(VGACommonState *s, int full_update)
1184 {
1185 DisplaySurface *surface = qemu_console_surface(s->con);
1186 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1187 int cx_min, cx_max, linesize, x_incr, line, line1;
1188 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1189 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1190 const uint8_t *font_ptr, *font_base[2];
1191 int dup9, line_offset;
1192 uint32_t *palette;
1193 uint32_t *ch_attr_ptr;
1194 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1195
1196 /* compute font data address (in plane 2) */
1197 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1198 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1199 if (offset != s->font_offsets[0]) {
1200 s->font_offsets[0] = offset;
1201 full_update = 1;
1202 }
1203 font_base[0] = s->vram_ptr + offset;
1204
1205 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1206 font_base[1] = s->vram_ptr + offset;
1207 if (offset != s->font_offsets[1]) {
1208 s->font_offsets[1] = offset;
1209 full_update = 1;
1210 }
1211 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1212 /* if the plane 2 was modified since the last display, it
1213 indicates the font may have been modified */
1214 s->plane_updated = 0;
1215 full_update = 1;
1216 }
1217 full_update |= update_basic_params(s);
1218
1219 line_offset = s->line_offset;
1220
1221 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1222 if ((height * width) <= 1) {
1223 /* better than nothing: exit if transient size is too small */
1224 return;
1225 }
1226 if ((height * width) > CH_ATTR_SIZE) {
1227 /* better than nothing: exit if transient size is too big */
1228 return;
1229 }
1230
1231 if (width != s->last_width || height != s->last_height ||
1232 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1233 s->last_scr_width = width * cw;
1234 s->last_scr_height = height * cheight;
1235 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1236 surface = qemu_console_surface(s->con);
1237 dpy_text_resize(s->con, width, height);
1238 s->last_depth = 0;
1239 s->last_width = width;
1240 s->last_height = height;
1241 s->last_ch = cheight;
1242 s->last_cw = cw;
1243 full_update = 1;
1244 }
1245 full_update |= update_palette16(s);
1246 palette = s->last_palette;
1247 x_incr = cw * surface_bytes_per_pixel(surface);
1248
1249 if (full_update) {
1250 s->full_update_text = 1;
1251 }
1252 if (s->full_update_gfx) {
1253 s->full_update_gfx = 0;
1254 full_update |= 1;
1255 }
1256
1257 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1258 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1259 if (cursor_offset != s->cursor_offset ||
1260 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1261 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1262 /* if the cursor position changed, we update the old and new
1263 chars */
1264 if (s->cursor_offset < CH_ATTR_SIZE)
1265 s->last_ch_attr[s->cursor_offset] = -1;
1266 if (cursor_offset < CH_ATTR_SIZE)
1267 s->last_ch_attr[cursor_offset] = -1;
1268 s->cursor_offset = cursor_offset;
1269 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1270 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1271 }
1272 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1273 if (now >= s->cursor_blink_time) {
1274 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1275 s->cursor_visible_phase = !s->cursor_visible_phase;
1276 }
1277
1278 dest = surface_data(surface);
1279 linesize = surface_stride(surface);
1280 ch_attr_ptr = s->last_ch_attr;
1281 line = 0;
1282 offset = s->start_addr * 4;
1283 for(cy = 0; cy < height; cy++) {
1284 d1 = dest;
1285 src = s->vram_ptr + offset;
1286 cx_min = width;
1287 cx_max = -1;
1288 for(cx = 0; cx < width; cx++) {
1289 if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) {
1290 break;
1291 }
1292 ch_attr = *(uint16_t *)src;
1293 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1294 if (cx < cx_min)
1295 cx_min = cx;
1296 if (cx > cx_max)
1297 cx_max = cx;
1298 *ch_attr_ptr = ch_attr;
1299 #ifdef HOST_WORDS_BIGENDIAN
1300 ch = ch_attr >> 8;
1301 cattr = ch_attr & 0xff;
1302 #else
1303 ch = ch_attr & 0xff;
1304 cattr = ch_attr >> 8;
1305 #endif
1306 font_ptr = font_base[(cattr >> 3) & 1];
1307 font_ptr += 32 * 4 * ch;
1308 bgcol = palette[cattr >> 4];
1309 fgcol = palette[cattr & 0x0f];
1310 if (cw == 16) {
1311 vga_draw_glyph16(d1, linesize,
1312 font_ptr, cheight, fgcol, bgcol);
1313 } else if (cw != 9) {
1314 vga_draw_glyph8(d1, linesize,
1315 font_ptr, cheight, fgcol, bgcol);
1316 } else {
1317 dup9 = 0;
1318 if (ch >= 0xb0 && ch <= 0xdf &&
1319 (s->ar[VGA_ATC_MODE] & 0x04)) {
1320 dup9 = 1;
1321 }
1322 vga_draw_glyph9(d1, linesize,
1323 font_ptr, cheight, fgcol, bgcol, dup9);
1324 }
1325 if (src == cursor_ptr &&
1326 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1327 s->cursor_visible_phase) {
1328 int line_start, line_last, h;
1329 /* draw the cursor */
1330 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1331 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1332 /* XXX: check that */
1333 if (line_last > cheight - 1)
1334 line_last = cheight - 1;
1335 if (line_last >= line_start && line_start < cheight) {
1336 h = line_last - line_start + 1;
1337 d = d1 + linesize * line_start;
1338 if (cw == 16) {
1339 vga_draw_glyph16(d, linesize,
1340 cursor_glyph, h, fgcol, bgcol);
1341 } else if (cw != 9) {
1342 vga_draw_glyph8(d, linesize,
1343 cursor_glyph, h, fgcol, bgcol);
1344 } else {
1345 vga_draw_glyph9(d, linesize,
1346 cursor_glyph, h, fgcol, bgcol, 1);
1347 }
1348 }
1349 }
1350 }
1351 d1 += x_incr;
1352 src += 4;
1353 ch_attr_ptr++;
1354 }
1355 if (cx_max != -1) {
1356 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1357 (cx_max - cx_min + 1) * cw, cheight);
1358 }
1359 dest += linesize * cheight;
1360 line1 = line + cheight;
1361 offset += line_offset;
1362 if (line < s->line_compare && line1 >= s->line_compare) {
1363 offset = 0;
1364 }
1365 line = line1;
1366 }
1367 }
1368
1369 enum {
1370 VGA_DRAW_LINE2,
1371 VGA_DRAW_LINE2D2,
1372 VGA_DRAW_LINE4,
1373 VGA_DRAW_LINE4D2,
1374 VGA_DRAW_LINE8D2,
1375 VGA_DRAW_LINE8,
1376 VGA_DRAW_LINE15_LE,
1377 VGA_DRAW_LINE16_LE,
1378 VGA_DRAW_LINE24_LE,
1379 VGA_DRAW_LINE32_LE,
1380 VGA_DRAW_LINE15_BE,
1381 VGA_DRAW_LINE16_BE,
1382 VGA_DRAW_LINE24_BE,
1383 VGA_DRAW_LINE32_BE,
1384 VGA_DRAW_LINE_NB,
1385 };
1386
1387 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1388 vga_draw_line2,
1389 vga_draw_line2d2,
1390 vga_draw_line4,
1391 vga_draw_line4d2,
1392 vga_draw_line8d2,
1393 vga_draw_line8,
1394 vga_draw_line15_le,
1395 vga_draw_line16_le,
1396 vga_draw_line24_le,
1397 vga_draw_line32_le,
1398 vga_draw_line15_be,
1399 vga_draw_line16_be,
1400 vga_draw_line24_be,
1401 vga_draw_line32_be,
1402 };
1403
1404 static int vga_get_bpp(VGACommonState *s)
1405 {
1406 int ret;
1407
1408 if (vbe_enabled(s)) {
1409 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1410 } else {
1411 ret = 0;
1412 }
1413 return ret;
1414 }
1415
1416 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1417 {
1418 int width, height;
1419
1420 if (vbe_enabled(s)) {
1421 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1422 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1423 } else {
1424 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1425 height = s->cr[VGA_CRTC_V_DISP_END] |
1426 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1427 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1428 height = (height + 1);
1429 }
1430 *pwidth = width;
1431 *pheight = height;
1432 }
1433
1434 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1435 {
1436 int y;
1437 if (y1 >= VGA_MAX_HEIGHT)
1438 return;
1439 if (y2 >= VGA_MAX_HEIGHT)
1440 y2 = VGA_MAX_HEIGHT;
1441 for(y = y1; y < y2; y++) {
1442 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1443 }
1444 }
1445
1446 static bool vga_scanline_invalidated(VGACommonState *s, int y)
1447 {
1448 if (y >= VGA_MAX_HEIGHT) {
1449 return false;
1450 }
1451 return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
1452 }
1453
1454 void vga_dirty_log_start(VGACommonState *s)
1455 {
1456 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1457 }
1458
1459 void vga_dirty_log_stop(VGACommonState *s)
1460 {
1461 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1462 }
1463
1464 /*
1465 * graphic modes
1466 */
1467 static void vga_draw_graphic(VGACommonState *s, int full_update)
1468 {
1469 DisplaySurface *surface = qemu_console_surface(s->con);
1470 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1471 int width, height, shift_control, bwidth, bits;
1472 ram_addr_t page0, page1, region_start, region_end;
1473 DirtyBitmapSnapshot *snap = NULL;
1474 int disp_width, multi_scan, multi_run;
1475 uint8_t *d;
1476 uint32_t v, addr1, addr;
1477 vga_draw_line_func *vga_draw_line = NULL;
1478 bool share_surface, force_shadow = false;
1479 pixman_format_code_t format;
1480 #ifdef HOST_WORDS_BIGENDIAN
1481 bool byteswap = !s->big_endian_fb;
1482 #else
1483 bool byteswap = s->big_endian_fb;
1484 #endif
1485
1486 full_update |= update_basic_params(s);
1487
1488 s->get_resolution(s, &width, &height);
1489 disp_width = width;
1490 depth = s->get_bpp(s);
1491
1492 region_start = (s->start_addr * 4);
1493 region_end = region_start + (ram_addr_t)s->line_offset * height;
1494 region_end += width * depth / 8; /* scanline length */
1495 region_end -= s->line_offset;
1496 if (region_end > s->vbe_size || depth == 0 || depth == 15) {
1497 /*
1498 * We land here on:
1499 * - wraps around (can happen with cirrus vbe modes)
1500 * - depth == 0 (256 color palette video mode)
1501 * - depth == 15
1502 *
1503 * Take the safe and slow route:
1504 * - create a dirty bitmap snapshot for all vga memory.
1505 * - force shadowing (so all vga memory access goes
1506 * through vga_read_*() helpers).
1507 *
1508 * Given this affects only vga features which are pretty much
1509 * unused by modern guests there should be no performance
1510 * impact.
1511 */
1512 region_start = 0;
1513 region_end = s->vbe_size;
1514 force_shadow = true;
1515 }
1516
1517 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1518 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1519 if (shift_control != 1) {
1520 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1521 - 1;
1522 } else {
1523 /* in CGA modes, multi_scan is ignored */
1524 /* XXX: is it correct ? */
1525 multi_scan = double_scan;
1526 }
1527 multi_run = multi_scan;
1528 if (shift_control != s->shift_control ||
1529 double_scan != s->double_scan) {
1530 full_update = 1;
1531 s->shift_control = shift_control;
1532 s->double_scan = double_scan;
1533 }
1534
1535 if (shift_control == 0) {
1536 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1537 disp_width <<= 1;
1538 }
1539 } else if (shift_control == 1) {
1540 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1541 disp_width <<= 1;
1542 }
1543 }
1544
1545 /*
1546 * Check whether we can share the surface with the backend
1547 * or whether we need a shadow surface. We share native
1548 * endian surfaces for 15bpp and above and byteswapped
1549 * surfaces for 24bpp and above.
1550 */
1551 format = qemu_default_pixman_format(depth, !byteswap);
1552 if (format) {
1553 share_surface = dpy_gfx_check_format(s->con, format)
1554 && !s->force_shadow && !force_shadow;
1555 } else {
1556 share_surface = false;
1557 }
1558
1559 if (s->line_offset != s->last_line_offset ||
1560 disp_width != s->last_width ||
1561 height != s->last_height ||
1562 s->last_depth != depth ||
1563 s->last_byteswap != byteswap ||
1564 share_surface != is_buffer_shared(surface)) {
1565 /* display parameters changed -> need new display surface */
1566 s->last_scr_width = disp_width;
1567 s->last_scr_height = height;
1568 s->last_width = disp_width;
1569 s->last_height = height;
1570 s->last_line_offset = s->line_offset;
1571 s->last_depth = depth;
1572 s->last_byteswap = byteswap;
1573 full_update = 1;
1574 }
1575 if (surface_data(surface) != s->vram_ptr + (s->start_addr * 4)
1576 && is_buffer_shared(surface)) {
1577 /* base address changed (page flip) -> shared display surfaces
1578 * must be updated with the new base address */
1579 full_update = 1;
1580 }
1581
1582 if (full_update) {
1583 if (share_surface) {
1584 surface = qemu_create_displaysurface_from(disp_width,
1585 height, format, s->line_offset,
1586 s->vram_ptr + (s->start_addr * 4));
1587 dpy_gfx_replace_surface(s->con, surface);
1588 } else {
1589 qemu_console_resize(s->con, disp_width, height);
1590 surface = qemu_console_surface(s->con);
1591 }
1592 }
1593
1594 if (shift_control == 0) {
1595 full_update |= update_palette16(s);
1596 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1597 v = VGA_DRAW_LINE4D2;
1598 } else {
1599 v = VGA_DRAW_LINE4;
1600 }
1601 bits = 4;
1602 } else if (shift_control == 1) {
1603 full_update |= update_palette16(s);
1604 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1605 v = VGA_DRAW_LINE2D2;
1606 } else {
1607 v = VGA_DRAW_LINE2;
1608 }
1609 bits = 4;
1610 } else {
1611 switch(s->get_bpp(s)) {
1612 default:
1613 case 0:
1614 full_update |= update_palette256(s);
1615 v = VGA_DRAW_LINE8D2;
1616 bits = 4;
1617 break;
1618 case 8:
1619 full_update |= update_palette256(s);
1620 v = VGA_DRAW_LINE8;
1621 bits = 8;
1622 break;
1623 case 15:
1624 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1625 bits = 16;
1626 break;
1627 case 16:
1628 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1629 bits = 16;
1630 break;
1631 case 24:
1632 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1633 bits = 24;
1634 break;
1635 case 32:
1636 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1637 bits = 32;
1638 break;
1639 }
1640 }
1641 vga_draw_line = vga_draw_line_table[v];
1642
1643 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1644 s->cursor_invalidate(s);
1645 }
1646
1647 #if 0
1648 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",
1649 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1650 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1651 #endif
1652 addr1 = (s->start_addr * 4);
1653 bwidth = DIV_ROUND_UP(width * bits, 8);
1654 y_start = -1;
1655 d = surface_data(surface);
1656 linesize = surface_stride(surface);
1657 y1 = 0;
1658
1659 if (!full_update) {
1660 if (s->line_compare < height) {
1661 /* split screen mode */
1662 region_start = 0;
1663 }
1664 snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start,
1665 region_end - region_start,
1666 DIRTY_MEMORY_VGA);
1667 }
1668
1669 for(y = 0; y < height; y++) {
1670 addr = addr1;
1671 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1672 int shift;
1673 /* CGA compatibility handling */
1674 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1675 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1676 }
1677 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1678 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1679 }
1680 page0 = addr & s->vbe_size_mask;
1681 page1 = (addr + bwidth - 1) & s->vbe_size_mask;
1682 if (full_update) {
1683 update = 1;
1684 } else if (page1 < page0) {
1685 /* scanline wraps from end of video memory to the start */
1686 assert(force_shadow);
1687 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1688 page0, s->vbe_size - page0);
1689 update |= memory_region_snapshot_get_dirty(&s->vram, snap,
1690 0, page1);
1691 } else {
1692 update = memory_region_snapshot_get_dirty(&s->vram, snap,
1693 page0, page1 - page0);
1694 }
1695 /* explicit invalidation for the hardware cursor (cirrus only) */
1696 update |= vga_scanline_invalidated(s, y);
1697 if (update) {
1698 if (y_start < 0)
1699 y_start = y;
1700 if (!(is_buffer_shared(surface))) {
1701 vga_draw_line(s, d, addr, width);
1702 if (s->cursor_draw_line)
1703 s->cursor_draw_line(s, d, y);
1704 }
1705 } else {
1706 if (y_start >= 0) {
1707 /* flush to display */
1708 dpy_gfx_update(s->con, 0, y_start,
1709 disp_width, y - y_start);
1710 y_start = -1;
1711 }
1712 }
1713 if (!multi_run) {
1714 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1715 if ((y1 & mask) == mask)
1716 addr1 += s->line_offset;
1717 y1++;
1718 multi_run = multi_scan;
1719 } else {
1720 multi_run--;
1721 }
1722 /* line compare acts on the displayed lines */
1723 if (y == s->line_compare)
1724 addr1 = 0;
1725 d += linesize;
1726 }
1727 if (y_start >= 0) {
1728 /* flush to display */
1729 dpy_gfx_update(s->con, 0, y_start,
1730 disp_width, y - y_start);
1731 }
1732 g_free(snap);
1733 memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
1734 }
1735
1736 static void vga_draw_blank(VGACommonState *s, int full_update)
1737 {
1738 DisplaySurface *surface = qemu_console_surface(s->con);
1739 int i, w;
1740 uint8_t *d;
1741
1742 if (!full_update)
1743 return;
1744 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1745 return;
1746
1747 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1748 d = surface_data(surface);
1749 for(i = 0; i < s->last_scr_height; i++) {
1750 memset(d, 0, w);
1751 d += surface_stride(surface);
1752 }
1753 dpy_gfx_update_full(s->con);
1754 }
1755
1756 #define GMODE_TEXT 0
1757 #define GMODE_GRAPH 1
1758 #define GMODE_BLANK 2
1759
1760 static void vga_update_display(void *opaque)
1761 {
1762 VGACommonState *s = opaque;
1763 DisplaySurface *surface = qemu_console_surface(s->con);
1764 int full_update, graphic_mode;
1765
1766 qemu_flush_coalesced_mmio_buffer();
1767
1768 if (surface_bits_per_pixel(surface) == 0) {
1769 /* nothing to do */
1770 } else {
1771 full_update = 0;
1772 if (!(s->ar_index & 0x20)) {
1773 graphic_mode = GMODE_BLANK;
1774 } else {
1775 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1776 }
1777 if (graphic_mode != s->graphic_mode) {
1778 s->graphic_mode = graphic_mode;
1779 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1780 full_update = 1;
1781 }
1782 switch(graphic_mode) {
1783 case GMODE_TEXT:
1784 vga_draw_text(s, full_update);
1785 break;
1786 case GMODE_GRAPH:
1787 vga_draw_graphic(s, full_update);
1788 break;
1789 case GMODE_BLANK:
1790 default:
1791 vga_draw_blank(s, full_update);
1792 break;
1793 }
1794 }
1795 }
1796
1797 /* force a full display refresh */
1798 static void vga_invalidate_display(void *opaque)
1799 {
1800 VGACommonState *s = opaque;
1801
1802 s->last_width = -1;
1803 s->last_height = -1;
1804 }
1805
1806 void vga_common_reset(VGACommonState *s)
1807 {
1808 s->sr_index = 0;
1809 memset(s->sr, '\0', sizeof(s->sr));
1810 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1811 s->gr_index = 0;
1812 memset(s->gr, '\0', sizeof(s->gr));
1813 s->ar_index = 0;
1814 memset(s->ar, '\0', sizeof(s->ar));
1815 s->ar_flip_flop = 0;
1816 s->cr_index = 0;
1817 memset(s->cr, '\0', sizeof(s->cr));
1818 s->msr = 0;
1819 s->fcr = 0;
1820 s->st00 = 0;
1821 s->st01 = 0;
1822 s->dac_state = 0;
1823 s->dac_sub_index = 0;
1824 s->dac_read_index = 0;
1825 s->dac_write_index = 0;
1826 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1827 s->dac_8bit = 0;
1828 memset(s->palette, '\0', sizeof(s->palette));
1829 s->bank_offset = 0;
1830 s->vbe_index = 0;
1831 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1832 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1833 s->vbe_start_addr = 0;
1834 s->vbe_line_offset = 0;
1835 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1836 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1837 s->graphic_mode = -1; /* force full update */
1838 s->shift_control = 0;
1839 s->double_scan = 0;
1840 s->line_offset = 0;
1841 s->line_compare = 0;
1842 s->start_addr = 0;
1843 s->plane_updated = 0;
1844 s->last_cw = 0;
1845 s->last_ch = 0;
1846 s->last_width = 0;
1847 s->last_height = 0;
1848 s->last_scr_width = 0;
1849 s->last_scr_height = 0;
1850 s->cursor_start = 0;
1851 s->cursor_end = 0;
1852 s->cursor_offset = 0;
1853 s->big_endian_fb = s->default_endian_fb;
1854 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1855 memset(s->last_palette, '\0', sizeof(s->last_palette));
1856 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1857 switch (vga_retrace_method) {
1858 case VGA_RETRACE_DUMB:
1859 break;
1860 case VGA_RETRACE_PRECISE:
1861 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1862 break;
1863 }
1864 vga_update_memory_access(s);
1865 }
1866
1867 static void vga_reset(void *opaque)
1868 {
1869 VGACommonState *s = opaque;
1870 vga_common_reset(s);
1871 }
1872
1873 #define TEXTMODE_X(x) ((x) % width)
1874 #define TEXTMODE_Y(x) ((x) / width)
1875 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1876 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1877 /* relay text rendering to the display driver
1878 * instead of doing a full vga_update_display() */
1879 static void vga_update_text(void *opaque, console_ch_t *chardata)
1880 {
1881 VGACommonState *s = opaque;
1882 int graphic_mode, i, cursor_offset, cursor_visible;
1883 int cw, cheight, width, height, size, c_min, c_max;
1884 uint32_t *src;
1885 console_ch_t *dst, val;
1886 char msg_buffer[80];
1887 int full_update = 0;
1888
1889 qemu_flush_coalesced_mmio_buffer();
1890
1891 if (!(s->ar_index & 0x20)) {
1892 graphic_mode = GMODE_BLANK;
1893 } else {
1894 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1895 }
1896 if (graphic_mode != s->graphic_mode) {
1897 s->graphic_mode = graphic_mode;
1898 full_update = 1;
1899 }
1900 if (s->last_width == -1) {
1901 s->last_width = 0;
1902 full_update = 1;
1903 }
1904
1905 switch (graphic_mode) {
1906 case GMODE_TEXT:
1907 /* TODO: update palette */
1908 full_update |= update_basic_params(s);
1909
1910 /* total width & height */
1911 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1912 cw = 8;
1913 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1914 cw = 9;
1915 }
1916 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1917 cw = 16; /* NOTE: no 18 pixel wide */
1918 }
1919 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1920 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1921 /* ugly hack for CGA 160x100x16 - explain me the logic */
1922 height = 100;
1923 } else {
1924 height = s->cr[VGA_CRTC_V_DISP_END] |
1925 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1926 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1927 height = (height + 1) / cheight;
1928 }
1929
1930 size = (height * width);
1931 if (size > CH_ATTR_SIZE) {
1932 if (!full_update)
1933 return;
1934
1935 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1936 width, height);
1937 break;
1938 }
1939
1940 if (width != s->last_width || height != s->last_height ||
1941 cw != s->last_cw || cheight != s->last_ch) {
1942 s->last_scr_width = width * cw;
1943 s->last_scr_height = height * cheight;
1944 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1945 dpy_text_resize(s->con, width, height);
1946 s->last_depth = 0;
1947 s->last_width = width;
1948 s->last_height = height;
1949 s->last_ch = cheight;
1950 s->last_cw = cw;
1951 full_update = 1;
1952 }
1953
1954 if (full_update) {
1955 s->full_update_gfx = 1;
1956 }
1957 if (s->full_update_text) {
1958 s->full_update_text = 0;
1959 full_update |= 1;
1960 }
1961
1962 /* Update "hardware" cursor */
1963 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1964 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1965 if (cursor_offset != s->cursor_offset ||
1966 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1967 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1968 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1969 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1970 dpy_text_cursor(s->con,
1971 TEXTMODE_X(cursor_offset),
1972 TEXTMODE_Y(cursor_offset));
1973 else
1974 dpy_text_cursor(s->con, -1, -1);
1975 s->cursor_offset = cursor_offset;
1976 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1977 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1978 }
1979
1980 src = (uint32_t *) s->vram_ptr + s->start_addr;
1981 dst = chardata;
1982
1983 if (full_update) {
1984 for (i = 0; i < size; src ++, dst ++, i ++)
1985 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1986
1987 dpy_text_update(s->con, 0, 0, width, height);
1988 } else {
1989 c_max = 0;
1990
1991 for (i = 0; i < size; src ++, dst ++, i ++) {
1992 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1993 if (*dst != val) {
1994 *dst = val;
1995 c_max = i;
1996 break;
1997 }
1998 }
1999 c_min = i;
2000 for (; i < size; src ++, dst ++, i ++) {
2001 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
2002 if (*dst != val) {
2003 *dst = val;
2004 c_max = i;
2005 }
2006 }
2007
2008 if (c_min <= c_max) {
2009 i = TEXTMODE_Y(c_min);
2010 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
2011 }
2012 }
2013
2014 return;
2015 case GMODE_GRAPH:
2016 if (!full_update)
2017 return;
2018
2019 s->get_resolution(s, &width, &height);
2020 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
2021 width, height);
2022 break;
2023 case GMODE_BLANK:
2024 default:
2025 if (!full_update)
2026 return;
2027
2028 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2029 break;
2030 }
2031
2032 /* Display a message */
2033 s->last_width = 60;
2034 s->last_height = height = 3;
2035 dpy_text_cursor(s->con, -1, -1);
2036 dpy_text_resize(s->con, s->last_width, height);
2037
2038 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2039 console_write_ch(dst ++, ' ');
2040
2041 size = strlen(msg_buffer);
2042 width = (s->last_width - size) / 2;
2043 dst = chardata + s->last_width + width;
2044 for (i = 0; i < size; i ++)
2045 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2046 QEMU_COLOR_BLACK, 1));
2047
2048 dpy_text_update(s->con, 0, 0, s->last_width, height);
2049 }
2050
2051 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2052 unsigned size)
2053 {
2054 VGACommonState *s = opaque;
2055
2056 return vga_mem_readb(s, addr);
2057 }
2058
2059 static void vga_mem_write(void *opaque, hwaddr addr,
2060 uint64_t data, unsigned size)
2061 {
2062 VGACommonState *s = opaque;
2063
2064 vga_mem_writeb(s, addr, data);
2065 }
2066
2067 const MemoryRegionOps vga_mem_ops = {
2068 .read = vga_mem_read,
2069 .write = vga_mem_write,
2070 .endianness = DEVICE_LITTLE_ENDIAN,
2071 .impl = {
2072 .min_access_size = 1,
2073 .max_access_size = 1,
2074 },
2075 };
2076
2077 static int vga_common_post_load(void *opaque, int version_id)
2078 {
2079 VGACommonState *s = opaque;
2080
2081 /* force refresh */
2082 s->graphic_mode = -1;
2083 vbe_update_vgaregs(s);
2084 vga_update_memory_access(s);
2085 return 0;
2086 }
2087
2088 static bool vga_endian_state_needed(void *opaque)
2089 {
2090 VGACommonState *s = opaque;
2091
2092 /*
2093 * Only send the endian state if it's different from the
2094 * default one, thus ensuring backward compatibility for
2095 * migration of the common case
2096 */
2097 return s->default_endian_fb != s->big_endian_fb;
2098 }
2099
2100 static const VMStateDescription vmstate_vga_endian = {
2101 .name = "vga.endian",
2102 .version_id = 1,
2103 .minimum_version_id = 1,
2104 .needed = vga_endian_state_needed,
2105 .fields = (VMStateField[]) {
2106 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2107 VMSTATE_END_OF_LIST()
2108 }
2109 };
2110
2111 const VMStateDescription vmstate_vga_common = {
2112 .name = "vga",
2113 .version_id = 2,
2114 .minimum_version_id = 2,
2115 .post_load = vga_common_post_load,
2116 .fields = (VMStateField[]) {
2117 VMSTATE_UINT32(latch, VGACommonState),
2118 VMSTATE_UINT8(sr_index, VGACommonState),
2119 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2120 VMSTATE_UINT8(gr_index, VGACommonState),
2121 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2122 VMSTATE_UINT8(ar_index, VGACommonState),
2123 VMSTATE_BUFFER(ar, VGACommonState),
2124 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2125 VMSTATE_UINT8(cr_index, VGACommonState),
2126 VMSTATE_BUFFER(cr, VGACommonState),
2127 VMSTATE_UINT8(msr, VGACommonState),
2128 VMSTATE_UINT8(fcr, VGACommonState),
2129 VMSTATE_UINT8(st00, VGACommonState),
2130 VMSTATE_UINT8(st01, VGACommonState),
2131
2132 VMSTATE_UINT8(dac_state, VGACommonState),
2133 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2134 VMSTATE_UINT8(dac_read_index, VGACommonState),
2135 VMSTATE_UINT8(dac_write_index, VGACommonState),
2136 VMSTATE_BUFFER(dac_cache, VGACommonState),
2137 VMSTATE_BUFFER(palette, VGACommonState),
2138
2139 VMSTATE_INT32(bank_offset, VGACommonState),
2140 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL),
2141 VMSTATE_UINT16(vbe_index, VGACommonState),
2142 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2143 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2144 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2145 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2146 VMSTATE_END_OF_LIST()
2147 },
2148 .subsections = (const VMStateDescription*[]) {
2149 &vmstate_vga_endian,
2150 NULL
2151 }
2152 };
2153
2154 static const GraphicHwOps vga_ops = {
2155 .invalidate = vga_invalidate_display,
2156 .gfx_update = vga_update_display,
2157 .text_update = vga_update_text,
2158 };
2159
2160 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2161 {
2162 if (val < vmin) {
2163 return vmin;
2164 }
2165 if (val > vmax) {
2166 return vmax;
2167 }
2168 return val;
2169 }
2170
2171 void vga_common_init(VGACommonState *s, Object *obj)
2172 {
2173 int i, j, v, b;
2174
2175 for(i = 0;i < 256; i++) {
2176 v = 0;
2177 for(j = 0; j < 8; j++) {
2178 v |= ((i >> j) & 1) << (j * 4);
2179 }
2180 expand4[i] = v;
2181
2182 v = 0;
2183 for(j = 0; j < 4; j++) {
2184 v |= ((i >> (2 * j)) & 3) << (j * 4);
2185 }
2186 expand2[i] = v;
2187 }
2188 for(i = 0; i < 16; i++) {
2189 v = 0;
2190 for(j = 0; j < 4; j++) {
2191 b = ((i >> j) & 1);
2192 v |= b << (2 * j);
2193 v |= b << (2 * j + 1);
2194 }
2195 expand4to8[i] = v;
2196 }
2197
2198 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2199 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2200 s->vram_size = s->vram_size_mb * MiB;
2201
2202 if (!s->vbe_size) {
2203 s->vbe_size = s->vram_size;
2204 }
2205 s->vbe_size_mask = s->vbe_size - 1;
2206
2207 s->is_vbe_vmstate = 1;
2208 memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
2209 &error_fatal);
2210 vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj));
2211 xen_register_framebuffer(&s->vram);
2212 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2213 s->get_bpp = vga_get_bpp;
2214 s->get_offsets = vga_get_offsets;
2215 s->get_resolution = vga_get_resolution;
2216 s->hw_ops = &vga_ops;
2217 switch (vga_retrace_method) {
2218 case VGA_RETRACE_DUMB:
2219 s->retrace = vga_dumb_retrace;
2220 s->update_retrace_info = vga_dumb_update_retrace_info;
2221 break;
2222
2223 case VGA_RETRACE_PRECISE:
2224 s->retrace = vga_precise_retrace;
2225 s->update_retrace_info = vga_precise_update_retrace_info;
2226 break;
2227 }
2228
2229 /*
2230 * Set default fb endian based on target, could probably be turned
2231 * into a device attribute set by the machine/platform to remove
2232 * all target endian dependencies from this file.
2233 */
2234 #ifdef TARGET_WORDS_BIGENDIAN
2235 s->default_endian_fb = true;
2236 #else
2237 s->default_endian_fb = false;
2238 #endif
2239 vga_dirty_log_start(s);
2240 }
2241
2242 static const MemoryRegionPortio vga_portio_list[] = {
2243 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2244 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2245 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2246 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2247 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2248 PORTIO_END_OF_LIST(),
2249 };
2250
2251 static const MemoryRegionPortio vbe_portio_list[] = {
2252 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2253 # ifdef TARGET_I386
2254 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2255 # endif
2256 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2257 PORTIO_END_OF_LIST(),
2258 };
2259
2260 /* Used by both ISA and PCI */
2261 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2262 const MemoryRegionPortio **vga_ports,
2263 const MemoryRegionPortio **vbe_ports)
2264 {
2265 MemoryRegion *vga_mem;
2266
2267 *vga_ports = vga_portio_list;
2268 *vbe_ports = vbe_portio_list;
2269
2270 vga_mem = g_malloc(sizeof(*vga_mem));
2271 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2272 "vga-lowmem", 0x20000);
2273 memory_region_set_flush_coalesced(vga_mem);
2274
2275 return vga_mem;
2276 }
2277
2278 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2279 MemoryRegion *address_space_io, bool init_vga_ports)
2280 {
2281 MemoryRegion *vga_io_memory;
2282 const MemoryRegionPortio *vga_ports, *vbe_ports;
2283
2284 qemu_register_reset(vga_reset, s);
2285
2286 s->bank_offset = 0;
2287
2288 s->legacy_address_space = address_space;
2289
2290 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2291 memory_region_add_subregion_overlap(address_space,
2292 0x000a0000,
2293 vga_io_memory,
2294 1);
2295 memory_region_set_coalescing(vga_io_memory);
2296 if (init_vga_ports) {
2297 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2298 portio_list_set_flush_coalesced(&s->vga_port_list);
2299 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2300 }
2301 if (vbe_ports) {
2302 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2303 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2304 }
2305 }
AR7 emulation for QEMU