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usb-bot: hotplug support
[qemu/kevin.git] / hw / display / vga.c
blob2a88b3c1b49a5e473e6ee4f7ac0b03aee4efcc7b
1 /*
2 * QEMU VGA Emulator.
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "hw/hw.h"
27 #include "vga.h"
28 #include "ui/console.h"
29 #include "hw/i386/pc.h"
30 #include "hw/pci/pci.h"
31 #include "vga_int.h"
32 #include "ui/pixel_ops.h"
33 #include "qemu/timer.h"
34 #include "hw/xen/xen.h"
35 #include "trace.h"
36
37 //#define DEBUG_VGA
38 //#define DEBUG_VGA_MEM
39 //#define DEBUG_VGA_REG
40
41 //#define DEBUG_BOCHS_VBE
42
43 /* 16 state changes per vertical frame @60 Hz */
44 #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60)
45
46 /*
47 * Video Graphics Array (VGA)
48 *
49 * Chipset docs for original IBM VGA:
50 * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
51 *
52 * FreeVGA site:
53 * http://www.osdever.net/FreeVGA/home.htm
54 *
55 * Standard VGA features and Bochs VBE extensions are implemented.
56 */
57
58 /* force some bits to zero */
59 const uint8_t sr_mask[8] = {
60 0x03,
61 0x3d,
62 0x0f,
63 0x3f,
64 0x0e,
65 0x00,
66 0x00,
67 0xff,
68 };
69
70 const uint8_t gr_mask[16] = {
71 0x0f, /* 0x00 */
72 0x0f, /* 0x01 */
73 0x0f, /* 0x02 */
74 0x1f, /* 0x03 */
75 0x03, /* 0x04 */
76 0x7b, /* 0x05 */
77 0x0f, /* 0x06 */
78 0x0f, /* 0x07 */
79 0xff, /* 0x08 */
80 0x00, /* 0x09 */
81 0x00, /* 0x0a */
82 0x00, /* 0x0b */
83 0x00, /* 0x0c */
84 0x00, /* 0x0d */
85 0x00, /* 0x0e */
86 0x00, /* 0x0f */
87 };
88
89 #define cbswap_32(__x) \
90 ((uint32_t)( \
91 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
92 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
93 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
94 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
95
96 #ifdef HOST_WORDS_BIGENDIAN
97 #define PAT(x) cbswap_32(x)
98 #else
99 #define PAT(x) (x)
100 #endif
101
102 #ifdef HOST_WORDS_BIGENDIAN
103 #define BIG 1
104 #else
105 #define BIG 0
106 #endif
107
108 #ifdef HOST_WORDS_BIGENDIAN
109 #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
110 #else
111 #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
112 #endif
113
114 static const uint32_t mask16[16] = {
115 PAT(0x00000000),
116 PAT(0x000000ff),
117 PAT(0x0000ff00),
118 PAT(0x0000ffff),
119 PAT(0x00ff0000),
120 PAT(0x00ff00ff),
121 PAT(0x00ffff00),
122 PAT(0x00ffffff),
123 PAT(0xff000000),
124 PAT(0xff0000ff),
125 PAT(0xff00ff00),
126 PAT(0xff00ffff),
127 PAT(0xffff0000),
128 PAT(0xffff00ff),
129 PAT(0xffffff00),
130 PAT(0xffffffff),
131 };
132
133 #undef PAT
134
135 #ifdef HOST_WORDS_BIGENDIAN
136 #define PAT(x) (x)
137 #else
138 #define PAT(x) cbswap_32(x)
139 #endif
140
141 static uint32_t expand4[256];
142 static uint16_t expand2[256];
143 static uint8_t expand4to8[16];
144
145 static void vbe_update_vgaregs(VGACommonState *s);
146
147 static inline bool vbe_enabled(VGACommonState *s)
148 {
149 return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
150 }
151
152 static inline uint8_t sr(VGACommonState *s, int idx)
153 {
154 return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx];
155 }
156
157 static void vga_update_memory_access(VGACommonState *s)
158 {
159 hwaddr base, offset, size;
160
161 if (s->legacy_address_space == NULL) {
162 return;
163 }
164
165 if (s->has_chain4_alias) {
166 memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias);
167 object_unparent(OBJECT(&s->chain4_alias));
168 s->has_chain4_alias = false;
169 s->plane_updated = 0xf;
170 }
171 if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) ==
172 VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
173 offset = 0;
174 switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) {
175 case 0:
176 base = 0xa0000;
177 size = 0x20000;
178 break;
179 case 1:
180 base = 0xa0000;
181 size = 0x10000;
182 offset = s->bank_offset;
183 break;
184 case 2:
185 base = 0xb0000;
186 size = 0x8000;
187 break;
188 case 3:
189 default:
190 base = 0xb8000;
191 size = 0x8000;
192 break;
193 }
194 assert(offset + size <= s->vram_size);
195 memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
196 "vga.chain4", &s->vram, offset, size);
197 memory_region_add_subregion_overlap(s->legacy_address_space, base,
198 &s->chain4_alias, 2);
199 s->has_chain4_alias = true;
200 }
201 }
202
203 static void vga_dumb_update_retrace_info(VGACommonState *s)
204 {
205 (void) s;
206 }
207
208 static void vga_precise_update_retrace_info(VGACommonState *s)
209 {
210 int htotal_chars;
211 int hretr_start_char;
212 int hretr_skew_chars;
213 int hretr_end_char;
214
215 int vtotal_lines;
216 int vretr_start_line;
217 int vretr_end_line;
218
219 int dots;
220 #if 0
221 int div2, sldiv2;
222 #endif
223 int clocking_mode;
224 int clock_sel;
225 const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
226 int64_t chars_per_sec;
227 struct vga_precise_retrace *r = &s->retrace_info.precise;
228
229 htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5;
230 hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START];
231 hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3;
232 hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f;
233
234 vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] |
235 (((s->cr[VGA_CRTC_OVERFLOW] & 1) |
236 ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2;
237 vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] |
238 ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) |
239 ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8);
240 vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf;
241
242 clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1;
243 clock_sel = (s->msr >> 2) & 3;
244 dots = (s->msr & 1) ? 8 : 9;
245
246 chars_per_sec = clk_hz[clock_sel] / dots;
247
248 htotal_chars <<= clocking_mode;
249
250 r->total_chars = vtotal_lines * htotal_chars;
251 if (r->freq) {
252 r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq);
253 } else {
254 r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec;
255 }
256
257 r->vstart = vretr_start_line;
258 r->vend = r->vstart + vretr_end_line + 1;
259
260 r->hstart = hretr_start_char + hretr_skew_chars;
261 r->hend = r->hstart + hretr_end_char + 1;
262 r->htotal = htotal_chars;
263
264 #if 0
265 div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1;
266 sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1;
267 printf (
268 "hz=%f\n"
269 "htotal = %d\n"
270 "hretr_start = %d\n"
271 "hretr_skew = %d\n"
272 "hretr_end = %d\n"
273 "vtotal = %d\n"
274 "vretr_start = %d\n"
275 "vretr_end = %d\n"
276 "div2 = %d sldiv2 = %d\n"
277 "clocking_mode = %d\n"
278 "clock_sel = %d %d\n"
279 "dots = %d\n"
280 "ticks/char = %" PRId64 "\n"
281 "\n",
282 (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars),
283 htotal_chars,
284 hretr_start_char,
285 hretr_skew_chars,
286 hretr_end_char,
287 vtotal_lines,
288 vretr_start_line,
289 vretr_end_line,
290 div2, sldiv2,
291 clocking_mode,
292 clock_sel,
293 clk_hz[clock_sel],
294 dots,
295 r->ticks_per_char
296 );
297 #endif
298 }
299
300 static uint8_t vga_precise_retrace(VGACommonState *s)
301 {
302 struct vga_precise_retrace *r = &s->retrace_info.precise;
303 uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
304
305 if (r->total_chars) {
306 int cur_line, cur_line_char, cur_char;
307 int64_t cur_tick;
308
309 cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
310
311 cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
312 cur_line = cur_char / r->htotal;
313
314 if (cur_line >= r->vstart && cur_line <= r->vend) {
315 val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
316 } else {
317 cur_line_char = cur_char % r->htotal;
318 if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
319 val |= ST01_DISP_ENABLE;
320 }
321 }
322
323 return val;
324 } else {
325 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
326 }
327 }
328
329 static uint8_t vga_dumb_retrace(VGACommonState *s)
330 {
331 return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
332 }
333
334 int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
335 {
336 if (s->msr & VGA_MIS_COLOR) {
337 /* Color */
338 return (addr >= 0x3b0 && addr <= 0x3bf);
339 } else {
340 /* Monochrome */
341 return (addr >= 0x3d0 && addr <= 0x3df);
342 }
343 }
344
345 uint32_t vga_ioport_read(void *opaque, uint32_t addr)
346 {
347 VGACommonState *s = opaque;
348 int val, index;
349
350 if (vga_ioport_invalid(s, addr)) {
351 val = 0xff;
352 } else {
353 switch(addr) {
354 case VGA_ATT_W:
355 if (s->ar_flip_flop == 0) {
356 val = s->ar_index;
357 } else {
358 val = 0;
359 }
360 break;
361 case VGA_ATT_R:
362 index = s->ar_index & 0x1f;
363 if (index < VGA_ATT_C) {
364 val = s->ar[index];
365 } else {
366 val = 0;
367 }
368 break;
369 case VGA_MIS_W:
370 val = s->st00;
371 break;
372 case VGA_SEQ_I:
373 val = s->sr_index;
374 break;
375 case VGA_SEQ_D:
376 val = s->sr[s->sr_index];
377 #ifdef DEBUG_VGA_REG
378 printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
379 #endif
380 break;
381 case VGA_PEL_IR:
382 val = s->dac_state;
383 break;
384 case VGA_PEL_IW:
385 val = s->dac_write_index;
386 break;
387 case VGA_PEL_D:
388 val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
389 if (++s->dac_sub_index == 3) {
390 s->dac_sub_index = 0;
391 s->dac_read_index++;
392 }
393 break;
394 case VGA_FTC_R:
395 val = s->fcr;
396 break;
397 case VGA_MIS_R:
398 val = s->msr;
399 break;
400 case VGA_GFX_I:
401 val = s->gr_index;
402 break;
403 case VGA_GFX_D:
404 val = s->gr[s->gr_index];
405 #ifdef DEBUG_VGA_REG
406 printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
407 #endif
408 break;
409 case VGA_CRT_IM:
410 case VGA_CRT_IC:
411 val = s->cr_index;
412 break;
413 case VGA_CRT_DM:
414 case VGA_CRT_DC:
415 val = s->cr[s->cr_index];
416 #ifdef DEBUG_VGA_REG
417 printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
418 #endif
419 break;
420 case VGA_IS1_RM:
421 case VGA_IS1_RC:
422 /* just toggle to fool polling */
423 val = s->st01 = s->retrace(s);
424 s->ar_flip_flop = 0;
425 break;
426 default:
427 val = 0x00;
428 break;
429 }
430 }
431 #if defined(DEBUG_VGA)
432 printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
433 #endif
434 return val;
435 }
436
437 void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
438 {
439 VGACommonState *s = opaque;
440 int index;
441
442 /* check port range access depending on color/monochrome mode */
443 if (vga_ioport_invalid(s, addr)) {
444 return;
445 }
446 #ifdef DEBUG_VGA
447 printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
448 #endif
449
450 switch(addr) {
451 case VGA_ATT_W:
452 if (s->ar_flip_flop == 0) {
453 val &= 0x3f;
454 s->ar_index = val;
455 } else {
456 index = s->ar_index & 0x1f;
457 switch(index) {
458 case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF:
459 s->ar[index] = val & 0x3f;
460 break;
461 case VGA_ATC_MODE:
462 s->ar[index] = val & ~0x10;
463 break;
464 case VGA_ATC_OVERSCAN:
465 s->ar[index] = val;
466 break;
467 case VGA_ATC_PLANE_ENABLE:
468 s->ar[index] = val & ~0xc0;
469 break;
470 case VGA_ATC_PEL:
471 s->ar[index] = val & ~0xf0;
472 break;
473 case VGA_ATC_COLOR_PAGE:
474 s->ar[index] = val & ~0xf0;
475 break;
476 default:
477 break;
478 }
479 }
480 s->ar_flip_flop ^= 1;
481 break;
482 case VGA_MIS_W:
483 s->msr = val & ~0x10;
484 s->update_retrace_info(s);
485 break;
486 case VGA_SEQ_I:
487 s->sr_index = val & 7;
488 break;
489 case VGA_SEQ_D:
490 #ifdef DEBUG_VGA_REG
491 printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
492 #endif
493 s->sr[s->sr_index] = val & sr_mask[s->sr_index];
494 if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
495 s->update_retrace_info(s);
496 }
497 vga_update_memory_access(s);
498 break;
499 case VGA_PEL_IR:
500 s->dac_read_index = val;
501 s->dac_sub_index = 0;
502 s->dac_state = 3;
503 break;
504 case VGA_PEL_IW:
505 s->dac_write_index = val;
506 s->dac_sub_index = 0;
507 s->dac_state = 0;
508 break;
509 case VGA_PEL_D:
510 s->dac_cache[s->dac_sub_index] = val;
511 if (++s->dac_sub_index == 3) {
512 memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
513 s->dac_sub_index = 0;
514 s->dac_write_index++;
515 }
516 break;
517 case VGA_GFX_I:
518 s->gr_index = val & 0x0f;
519 break;
520 case VGA_GFX_D:
521 #ifdef DEBUG_VGA_REG
522 printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
523 #endif
524 s->gr[s->gr_index] = val & gr_mask[s->gr_index];
525 vbe_update_vgaregs(s);
526 vga_update_memory_access(s);
527 break;
528 case VGA_CRT_IM:
529 case VGA_CRT_IC:
530 s->cr_index = val;
531 break;
532 case VGA_CRT_DM:
533 case VGA_CRT_DC:
534 #ifdef DEBUG_VGA_REG
535 printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
536 #endif
537 /* handle CR0-7 protection */
538 if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) &&
539 s->cr_index <= VGA_CRTC_OVERFLOW) {
540 /* can always write bit 4 of CR7 */
541 if (s->cr_index == VGA_CRTC_OVERFLOW) {
542 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
543 (val & 0x10);
544 vbe_update_vgaregs(s);
545 }
546 return;
547 }
548 s->cr[s->cr_index] = val;
549 vbe_update_vgaregs(s);
550
551 switch(s->cr_index) {
552 case VGA_CRTC_H_TOTAL:
553 case VGA_CRTC_H_SYNC_START:
554 case VGA_CRTC_H_SYNC_END:
555 case VGA_CRTC_V_TOTAL:
556 case VGA_CRTC_OVERFLOW:
557 case VGA_CRTC_V_SYNC_END:
558 case VGA_CRTC_MODE:
559 s->update_retrace_info(s);
560 break;
561 }
562 break;
563 case VGA_IS1_RM:
564 case VGA_IS1_RC:
565 s->fcr = val & 0x10;
566 break;
567 }
568 }
569
570 /*
571 * Sanity check vbe register writes.
572 *
573 * As we don't have a way to signal errors to the guest in the bochs
574 * dispi interface we'll go adjust the registers to the closest valid
575 * value.
576 */
577 static void vbe_fixup_regs(VGACommonState *s)
578 {
579 uint16_t *r = s->vbe_regs;
580 uint32_t bits, linelength, maxy, offset;
581
582 if (!vbe_enabled(s)) {
583 /* vbe is turned off -- nothing to do */
584 return;
585 }
586
587 /* check depth */
588 switch (r[VBE_DISPI_INDEX_BPP]) {
589 case 4:
590 case 8:
591 case 16:
592 case 24:
593 case 32:
594 bits = r[VBE_DISPI_INDEX_BPP];
595 break;
596 case 15:
597 bits = 16;
598 break;
599 default:
600 bits = r[VBE_DISPI_INDEX_BPP] = 8;
601 break;
602 }
603
604 /* check width */
605 r[VBE_DISPI_INDEX_XRES] &= ~7u;
606 if (r[VBE_DISPI_INDEX_XRES] == 0) {
607 r[VBE_DISPI_INDEX_XRES] = 8;
608 }
609 if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) {
610 r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES;
611 }
612 r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u;
613 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) {
614 r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES;
615 }
616 if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) {
617 r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES];
618 }
619
620 /* check height */
621 linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8;
622 maxy = s->vbe_size / linelength;
623 if (r[VBE_DISPI_INDEX_YRES] == 0) {
624 r[VBE_DISPI_INDEX_YRES] = 1;
625 }
626 if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) {
627 r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES;
628 }
629 if (r[VBE_DISPI_INDEX_YRES] > maxy) {
630 r[VBE_DISPI_INDEX_YRES] = maxy;
631 }
632
633 /* check offset */
634 if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) {
635 r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES;
636 }
637 if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) {
638 r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES;
639 }
640 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
641 offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength;
642 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
643 r[VBE_DISPI_INDEX_Y_OFFSET] = 0;
644 offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8;
645 if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) {
646 r[VBE_DISPI_INDEX_X_OFFSET] = 0;
647 offset = 0;
648 }
649 }
650
651 /* update vga state */
652 r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy;
653 s->vbe_line_offset = linelength;
654 s->vbe_start_addr = offset / 4;
655 }
656
657 /* we initialize the VGA graphic mode */
658 static void vbe_update_vgaregs(VGACommonState *s)
659 {
660 int h, shift_control;
661
662 if (!vbe_enabled(s)) {
663 /* vbe is turned off -- nothing to do */
664 return;
665 }
666
667 /* graphic mode + memory map 1 */
668 s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
669 VGA_GR06_GRAPHICS_MODE;
670 s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
671 s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
672 /* width */
673 s->cr[VGA_CRTC_H_DISP] =
674 (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
675 /* height (only meaningful if < 1024) */
676 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
677 s->cr[VGA_CRTC_V_DISP_END] = h;
678 s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
679 ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
680 /* line compare to 1023 */
681 s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
682 s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
683 s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
684
685 if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
686 shift_control = 0;
687 s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
688 } else {
689 shift_control = 2;
690 /* set chain 4 mode */
691 s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
692 /* activate all planes */
693 s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
694 }
695 s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
696 (shift_control << 5);
697 s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
698 }
699
700 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
701 {
702 VGACommonState *s = opaque;
703 return s->vbe_index;
704 }
705
706 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
707 {
708 VGACommonState *s = opaque;
709 uint32_t val;
710
711 if (s->vbe_index < VBE_DISPI_INDEX_NB) {
712 if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
713 switch(s->vbe_index) {
714 /* XXX: do not hardcode ? */
715 case VBE_DISPI_INDEX_XRES:
716 val = VBE_DISPI_MAX_XRES;
717 break;
718 case VBE_DISPI_INDEX_YRES:
719 val = VBE_DISPI_MAX_YRES;
720 break;
721 case VBE_DISPI_INDEX_BPP:
722 val = VBE_DISPI_MAX_BPP;
723 break;
724 default:
725 val = s->vbe_regs[s->vbe_index];
726 break;
727 }
728 } else {
729 val = s->vbe_regs[s->vbe_index];
730 }
731 } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
732 val = s->vbe_size / (64 * 1024);
733 } else {
734 val = 0;
735 }
736 #ifdef DEBUG_BOCHS_VBE
737 printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
738 #endif
739 return val;
740 }
741
742 void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
743 {
744 VGACommonState *s = opaque;
745 s->vbe_index = val;
746 }
747
748 void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
749 {
750 VGACommonState *s = opaque;
751
752 if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
753 #ifdef DEBUG_BOCHS_VBE
754 printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
755 #endif
756 switch(s->vbe_index) {
757 case VBE_DISPI_INDEX_ID:
758 if (val == VBE_DISPI_ID0 ||
759 val == VBE_DISPI_ID1 ||
760 val == VBE_DISPI_ID2 ||
761 val == VBE_DISPI_ID3 ||
762 val == VBE_DISPI_ID4) {
763 s->vbe_regs[s->vbe_index] = val;
764 }
765 break;
766 case VBE_DISPI_INDEX_XRES:
767 case VBE_DISPI_INDEX_YRES:
768 case VBE_DISPI_INDEX_BPP:
769 case VBE_DISPI_INDEX_VIRT_WIDTH:
770 case VBE_DISPI_INDEX_X_OFFSET:
771 case VBE_DISPI_INDEX_Y_OFFSET:
772 s->vbe_regs[s->vbe_index] = val;
773 vbe_fixup_regs(s);
774 vbe_update_vgaregs(s);
775 break;
776 case VBE_DISPI_INDEX_BANK:
777 val &= s->vbe_bank_mask;
778 s->vbe_regs[s->vbe_index] = val;
779 s->bank_offset = (val << 16);
780 vga_update_memory_access(s);
781 break;
782 case VBE_DISPI_INDEX_ENABLE:
783 if ((val & VBE_DISPI_ENABLED) &&
784 !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
785
786 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
787 s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
788 s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
789 s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
790 vbe_fixup_regs(s);
791 vbe_update_vgaregs(s);
792
793 /* clear the screen */
794 if (!(val & VBE_DISPI_NOCLEARMEM)) {
795 memset(s->vram_ptr, 0,
796 s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
797 }
798 } else {
799 s->bank_offset = 0;
800 }
801 s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
802 s->vbe_regs[s->vbe_index] = val;
803 vga_update_memory_access(s);
804 break;
805 default:
806 break;
807 }
808 }
809 }
810
811 /* called for accesses between 0xa0000 and 0xc0000 */
812 uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
813 {
814 int memory_map_mode, plane;
815 uint32_t ret;
816
817 /* convert to VGA memory offset */
818 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
819 addr &= 0x1ffff;
820 switch(memory_map_mode) {
821 case 0:
822 break;
823 case 1:
824 if (addr >= 0x10000)
825 return 0xff;
826 addr += s->bank_offset;
827 break;
828 case 2:
829 addr -= 0x10000;
830 if (addr >= 0x8000)
831 return 0xff;
832 break;
833 default:
834 case 3:
835 addr -= 0x18000;
836 if (addr >= 0x8000)
837 return 0xff;
838 break;
839 }
840
841 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
842 /* chain 4 mode : simplest access */
843 assert(addr < s->vram_size);
844 ret = s->vram_ptr[addr];
845 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
846 /* odd/even mode (aka text mode mapping) */
847 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
848 addr = ((addr & ~1) << 1) | plane;
849 if (addr >= s->vram_size) {
850 return 0xff;
851 }
852 ret = s->vram_ptr[addr];
853 } else {
854 /* standard VGA latched access */
855 if (addr * sizeof(uint32_t) >= s->vram_size) {
856 return 0xff;
857 }
858 s->latch = ((uint32_t *)s->vram_ptr)[addr];
859
860 if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
861 /* read mode 0 */
862 plane = s->gr[VGA_GFX_PLANE_READ];
863 ret = GET_PLANE(s->latch, plane);
864 } else {
865 /* read mode 1 */
866 ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) &
867 mask16[s->gr[VGA_GFX_COMPARE_MASK]];
868 ret |= ret >> 16;
869 ret |= ret >> 8;
870 ret = (~ret) & 0xff;
871 }
872 }
873 return ret;
874 }
875
876 /* called for accesses between 0xa0000 and 0xc0000 */
877 void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
878 {
879 int memory_map_mode, plane, write_mode, b, func_select, mask;
880 uint32_t write_mask, bit_mask, set_mask;
881
882 #ifdef DEBUG_VGA_MEM
883 printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
884 #endif
885 /* convert to VGA memory offset */
886 memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3;
887 addr &= 0x1ffff;
888 switch(memory_map_mode) {
889 case 0:
890 break;
891 case 1:
892 if (addr >= 0x10000)
893 return;
894 addr += s->bank_offset;
895 break;
896 case 2:
897 addr -= 0x10000;
898 if (addr >= 0x8000)
899 return;
900 break;
901 default:
902 case 3:
903 addr -= 0x18000;
904 if (addr >= 0x8000)
905 return;
906 break;
907 }
908
909 if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) {
910 /* chain 4 mode : simplest access */
911 plane = addr & 3;
912 mask = (1 << plane);
913 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
914 assert(addr < s->vram_size);
915 s->vram_ptr[addr] = val;
916 #ifdef DEBUG_VGA_MEM
917 printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
918 #endif
919 s->plane_updated |= mask; /* only used to detect font change */
920 memory_region_set_dirty(&s->vram, addr, 1);
921 }
922 } else if (s->gr[VGA_GFX_MODE] & 0x10) {
923 /* odd/even mode (aka text mode mapping) */
924 plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
925 mask = (1 << plane);
926 if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) {
927 addr = ((addr & ~1) << 1) | plane;
928 if (addr >= s->vram_size) {
929 return;
930 }
931 s->vram_ptr[addr] = val;
932 #ifdef DEBUG_VGA_MEM
933 printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
934 #endif
935 s->plane_updated |= mask; /* only used to detect font change */
936 memory_region_set_dirty(&s->vram, addr, 1);
937 }
938 } else {
939 /* standard VGA latched access */
940 write_mode = s->gr[VGA_GFX_MODE] & 3;
941 switch(write_mode) {
942 default:
943 case 0:
944 /* rotate */
945 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
946 val = ((val >> b) | (val << (8 - b))) & 0xff;
947 val |= val << 8;
948 val |= val << 16;
949
950 /* apply set/reset mask */
951 set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]];
952 val = (val & ~set_mask) |
953 (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask);
954 bit_mask = s->gr[VGA_GFX_BIT_MASK];
955 break;
956 case 1:
957 val = s->latch;
958 goto do_write;
959 case 2:
960 val = mask16[val & 0x0f];
961 bit_mask = s->gr[VGA_GFX_BIT_MASK];
962 break;
963 case 3:
964 /* rotate */
965 b = s->gr[VGA_GFX_DATA_ROTATE] & 7;
966 val = (val >> b) | (val << (8 - b));
967
968 bit_mask = s->gr[VGA_GFX_BIT_MASK] & val;
969 val = mask16[s->gr[VGA_GFX_SR_VALUE]];
970 break;
971 }
972
973 /* apply logical operation */
974 func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3;
975 switch(func_select) {
976 case 0:
977 default:
978 /* nothing to do */
979 break;
980 case 1:
981 /* and */
982 val &= s->latch;
983 break;
984 case 2:
985 /* or */
986 val |= s->latch;
987 break;
988 case 3:
989 /* xor */
990 val ^= s->latch;
991 break;
992 }
993
994 /* apply bit mask */
995 bit_mask |= bit_mask << 8;
996 bit_mask |= bit_mask << 16;
997 val = (val & bit_mask) | (s->latch & ~bit_mask);
998
999 do_write:
1000 /* mask data according to sr[2] */
1001 mask = sr(s, VGA_SEQ_PLANE_WRITE);
1002 s->plane_updated |= mask; /* only used to detect font change */
1003 write_mask = mask16[mask];
1004 if (addr * sizeof(uint32_t) >= s->vram_size) {
1005 return;
1006 }
1007 ((uint32_t *)s->vram_ptr)[addr] =
1008 (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
1009 (val & write_mask);
1010 #ifdef DEBUG_VGA_MEM
1011 printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
1012 addr * 4, write_mask, val);
1013 #endif
1014 memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t));
1015 }
1016 }
1017
1018 typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
1019 const uint8_t *s, int width);
1020
1021 #include "vga-helpers.h"
1022
1023 /* return true if the palette was modified */
1024 static int update_palette16(VGACommonState *s)
1025 {
1026 int full_update, i;
1027 uint32_t v, col, *palette;
1028
1029 full_update = 0;
1030 palette = s->last_palette;
1031 for(i = 0; i < 16; i++) {
1032 v = s->ar[i];
1033 if (s->ar[VGA_ATC_MODE] & 0x80) {
1034 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf);
1035 } else {
1036 v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f);
1037 }
1038 v = v * 3;
1039 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1040 c6_to_8(s->palette[v + 1]),
1041 c6_to_8(s->palette[v + 2]));
1042 if (col != palette[i]) {
1043 full_update = 1;
1044 palette[i] = col;
1045 }
1046 }
1047 return full_update;
1048 }
1049
1050 /* return true if the palette was modified */
1051 static int update_palette256(VGACommonState *s)
1052 {
1053 int full_update, i;
1054 uint32_t v, col, *palette;
1055
1056 full_update = 0;
1057 palette = s->last_palette;
1058 v = 0;
1059 for(i = 0; i < 256; i++) {
1060 if (s->dac_8bit) {
1061 col = rgb_to_pixel32(s->palette[v],
1062 s->palette[v + 1],
1063 s->palette[v + 2]);
1064 } else {
1065 col = rgb_to_pixel32(c6_to_8(s->palette[v]),
1066 c6_to_8(s->palette[v + 1]),
1067 c6_to_8(s->palette[v + 2]));
1068 }
1069 if (col != palette[i]) {
1070 full_update = 1;
1071 palette[i] = col;
1072 }
1073 v += 3;
1074 }
1075 return full_update;
1076 }
1077
1078 static void vga_get_offsets(VGACommonState *s,
1079 uint32_t *pline_offset,
1080 uint32_t *pstart_addr,
1081 uint32_t *pline_compare)
1082 {
1083 uint32_t start_addr, line_offset, line_compare;
1084
1085 if (vbe_enabled(s)) {
1086 line_offset = s->vbe_line_offset;
1087 start_addr = s->vbe_start_addr;
1088 line_compare = 65535;
1089 } else {
1090 /* compute line_offset in bytes */
1091 line_offset = s->cr[VGA_CRTC_OFFSET];
1092 line_offset <<= 3;
1093
1094 /* starting address */
1095 start_addr = s->cr[VGA_CRTC_START_LO] |
1096 (s->cr[VGA_CRTC_START_HI] << 8);
1097
1098 /* line compare */
1099 line_compare = s->cr[VGA_CRTC_LINE_COMPARE] |
1100 ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) |
1101 ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3);
1102 }
1103 *pline_offset = line_offset;
1104 *pstart_addr = start_addr;
1105 *pline_compare = line_compare;
1106 }
1107
1108 /* update start_addr and line_offset. Return TRUE if modified */
1109 static int update_basic_params(VGACommonState *s)
1110 {
1111 int full_update;
1112 uint32_t start_addr, line_offset, line_compare;
1113
1114 full_update = 0;
1115
1116 s->get_offsets(s, &line_offset, &start_addr, &line_compare);
1117
1118 if (line_offset != s->line_offset ||
1119 start_addr != s->start_addr ||
1120 line_compare != s->line_compare) {
1121 s->line_offset = line_offset;
1122 s->start_addr = start_addr;
1123 s->line_compare = line_compare;
1124 full_update = 1;
1125 }
1126 return full_update;
1127 }
1128
1129
1130 static const uint8_t cursor_glyph[32 * 4] = {
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 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1147 };
1148
1149 static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
1150 int *pcwidth, int *pcheight)
1151 {
1152 int width, cwidth, height, cheight;
1153
1154 /* total width & height */
1155 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1156 cwidth = 8;
1157 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1158 cwidth = 9;
1159 }
1160 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1161 cwidth = 16; /* NOTE: no 18 pixel wide */
1162 }
1163 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1164 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1165 /* ugly hack for CGA 160x100x16 - explain me the logic */
1166 height = 100;
1167 } else {
1168 height = s->cr[VGA_CRTC_V_DISP_END] |
1169 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1170 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1171 height = (height + 1) / cheight;
1172 }
1173
1174 *pwidth = width;
1175 *pheight = height;
1176 *pcwidth = cwidth;
1177 *pcheight = cheight;
1178 }
1179
1180 /*
1181 * Text mode update
1182 * Missing:
1183 * - double scan
1184 * - double width
1185 * - underline
1186 * - flashing
1187 */
1188 static void vga_draw_text(VGACommonState *s, int full_update)
1189 {
1190 DisplaySurface *surface = qemu_console_surface(s->con);
1191 int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
1192 int cx_min, cx_max, linesize, x_incr, line, line1;
1193 uint32_t offset, fgcol, bgcol, v, cursor_offset;
1194 uint8_t *d1, *d, *src, *dest, *cursor_ptr;
1195 const uint8_t *font_ptr, *font_base[2];
1196 int dup9, line_offset;
1197 uint32_t *palette;
1198 uint32_t *ch_attr_ptr;
1199 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1200
1201 /* compute font data address (in plane 2) */
1202 v = sr(s, VGA_SEQ_CHARACTER_MAP);
1203 offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
1204 if (offset != s->font_offsets[0]) {
1205 s->font_offsets[0] = offset;
1206 full_update = 1;
1207 }
1208 font_base[0] = s->vram_ptr + offset;
1209
1210 offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
1211 font_base[1] = s->vram_ptr + offset;
1212 if (offset != s->font_offsets[1]) {
1213 s->font_offsets[1] = offset;
1214 full_update = 1;
1215 }
1216 if (s->plane_updated & (1 << 2) || s->has_chain4_alias) {
1217 /* if the plane 2 was modified since the last display, it
1218 indicates the font may have been modified */
1219 s->plane_updated = 0;
1220 full_update = 1;
1221 }
1222 full_update |= update_basic_params(s);
1223
1224 line_offset = s->line_offset;
1225
1226 vga_get_text_resolution(s, &width, &height, &cw, &cheight);
1227 if ((height * width) <= 1) {
1228 /* better than nothing: exit if transient size is too small */
1229 return;
1230 }
1231 if ((height * width) > CH_ATTR_SIZE) {
1232 /* better than nothing: exit if transient size is too big */
1233 return;
1234 }
1235
1236 if (width != s->last_width || height != s->last_height ||
1237 cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
1238 s->last_scr_width = width * cw;
1239 s->last_scr_height = height * cheight;
1240 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1241 surface = qemu_console_surface(s->con);
1242 dpy_text_resize(s->con, width, height);
1243 s->last_depth = 0;
1244 s->last_width = width;
1245 s->last_height = height;
1246 s->last_ch = cheight;
1247 s->last_cw = cw;
1248 full_update = 1;
1249 }
1250 full_update |= update_palette16(s);
1251 palette = s->last_palette;
1252 x_incr = cw * surface_bytes_per_pixel(surface);
1253
1254 if (full_update) {
1255 s->full_update_text = 1;
1256 }
1257 if (s->full_update_gfx) {
1258 s->full_update_gfx = 0;
1259 full_update |= 1;
1260 }
1261
1262 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1263 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1264 if (cursor_offset != s->cursor_offset ||
1265 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1266 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) {
1267 /* if the cursor position changed, we update the old and new
1268 chars */
1269 if (s->cursor_offset < CH_ATTR_SIZE)
1270 s->last_ch_attr[s->cursor_offset] = -1;
1271 if (cursor_offset < CH_ATTR_SIZE)
1272 s->last_ch_attr[cursor_offset] = -1;
1273 s->cursor_offset = cursor_offset;
1274 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1275 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1276 }
1277 cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
1278 if (now >= s->cursor_blink_time) {
1279 s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2;
1280 s->cursor_visible_phase = !s->cursor_visible_phase;
1281 }
1282
1283 dest = surface_data(surface);
1284 linesize = surface_stride(surface);
1285 ch_attr_ptr = s->last_ch_attr;
1286 line = 0;
1287 offset = s->start_addr * 4;
1288 for(cy = 0; cy < height; cy++) {
1289 d1 = dest;
1290 src = s->vram_ptr + offset;
1291 cx_min = width;
1292 cx_max = -1;
1293 for(cx = 0; cx < width; cx++) {
1294 ch_attr = *(uint16_t *)src;
1295 if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) {
1296 if (cx < cx_min)
1297 cx_min = cx;
1298 if (cx > cx_max)
1299 cx_max = cx;
1300 *ch_attr_ptr = ch_attr;
1301 #ifdef HOST_WORDS_BIGENDIAN
1302 ch = ch_attr >> 8;
1303 cattr = ch_attr & 0xff;
1304 #else
1305 ch = ch_attr & 0xff;
1306 cattr = ch_attr >> 8;
1307 #endif
1308 font_ptr = font_base[(cattr >> 3) & 1];
1309 font_ptr += 32 * 4 * ch;
1310 bgcol = palette[cattr >> 4];
1311 fgcol = palette[cattr & 0x0f];
1312 if (cw == 16) {
1313 vga_draw_glyph16(d1, linesize,
1314 font_ptr, cheight, fgcol, bgcol);
1315 } else if (cw != 9) {
1316 vga_draw_glyph8(d1, linesize,
1317 font_ptr, cheight, fgcol, bgcol);
1318 } else {
1319 dup9 = 0;
1320 if (ch >= 0xb0 && ch <= 0xdf &&
1321 (s->ar[VGA_ATC_MODE] & 0x04)) {
1322 dup9 = 1;
1323 }
1324 vga_draw_glyph9(d1, linesize,
1325 font_ptr, cheight, fgcol, bgcol, dup9);
1326 }
1327 if (src == cursor_ptr &&
1328 !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) &&
1329 s->cursor_visible_phase) {
1330 int line_start, line_last, h;
1331 /* draw the cursor */
1332 line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f;
1333 line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f;
1334 /* XXX: check that */
1335 if (line_last > cheight - 1)
1336 line_last = cheight - 1;
1337 if (line_last >= line_start && line_start < cheight) {
1338 h = line_last - line_start + 1;
1339 d = d1 + linesize * line_start;
1340 if (cw == 16) {
1341 vga_draw_glyph16(d, linesize,
1342 cursor_glyph, h, fgcol, bgcol);
1343 } else if (cw != 9) {
1344 vga_draw_glyph8(d, linesize,
1345 cursor_glyph, h, fgcol, bgcol);
1346 } else {
1347 vga_draw_glyph9(d, linesize,
1348 cursor_glyph, h, fgcol, bgcol, 1);
1349 }
1350 }
1351 }
1352 }
1353 d1 += x_incr;
1354 src += 4;
1355 ch_attr_ptr++;
1356 }
1357 if (cx_max != -1) {
1358 dpy_gfx_update(s->con, cx_min * cw, cy * cheight,
1359 (cx_max - cx_min + 1) * cw, cheight);
1360 }
1361 dest += linesize * cheight;
1362 line1 = line + cheight;
1363 offset += line_offset;
1364 if (line < s->line_compare && line1 >= s->line_compare) {
1365 offset = 0;
1366 }
1367 line = line1;
1368 }
1369 }
1370
1371 enum {
1372 VGA_DRAW_LINE2,
1373 VGA_DRAW_LINE2D2,
1374 VGA_DRAW_LINE4,
1375 VGA_DRAW_LINE4D2,
1376 VGA_DRAW_LINE8D2,
1377 VGA_DRAW_LINE8,
1378 VGA_DRAW_LINE15_LE,
1379 VGA_DRAW_LINE16_LE,
1380 VGA_DRAW_LINE24_LE,
1381 VGA_DRAW_LINE32_LE,
1382 VGA_DRAW_LINE15_BE,
1383 VGA_DRAW_LINE16_BE,
1384 VGA_DRAW_LINE24_BE,
1385 VGA_DRAW_LINE32_BE,
1386 VGA_DRAW_LINE_NB,
1387 };
1388
1389 static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = {
1390 vga_draw_line2,
1391 vga_draw_line2d2,
1392 vga_draw_line4,
1393 vga_draw_line4d2,
1394 vga_draw_line8d2,
1395 vga_draw_line8,
1396 vga_draw_line15_le,
1397 vga_draw_line16_le,
1398 vga_draw_line24_le,
1399 vga_draw_line32_le,
1400 vga_draw_line15_be,
1401 vga_draw_line16_be,
1402 vga_draw_line24_be,
1403 vga_draw_line32_be,
1404 };
1405
1406 static int vga_get_bpp(VGACommonState *s)
1407 {
1408 int ret;
1409
1410 if (vbe_enabled(s)) {
1411 ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
1412 } else {
1413 ret = 0;
1414 }
1415 return ret;
1416 }
1417
1418 static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
1419 {
1420 int width, height;
1421
1422 if (vbe_enabled(s)) {
1423 width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
1424 height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
1425 } else {
1426 width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8;
1427 height = s->cr[VGA_CRTC_V_DISP_END] |
1428 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1429 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1430 height = (height + 1);
1431 }
1432 *pwidth = width;
1433 *pheight = height;
1434 }
1435
1436 void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
1437 {
1438 int y;
1439 if (y1 >= VGA_MAX_HEIGHT)
1440 return;
1441 if (y2 >= VGA_MAX_HEIGHT)
1442 y2 = VGA_MAX_HEIGHT;
1443 for(y = y1; y < y2; y++) {
1444 s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
1445 }
1446 }
1447
1448 void vga_sync_dirty_bitmap(VGACommonState *s)
1449 {
1450 memory_region_sync_dirty_bitmap(&s->vram);
1451 }
1452
1453 void vga_dirty_log_start(VGACommonState *s)
1454 {
1455 memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
1456 }
1457
1458 void vga_dirty_log_stop(VGACommonState *s)
1459 {
1460 memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
1461 }
1462
1463 /*
1464 * graphic modes
1465 */
1466 static void vga_draw_graphic(VGACommonState *s, int full_update)
1467 {
1468 DisplaySurface *surface = qemu_console_surface(s->con);
1469 int y1, y, update, linesize, y_start, double_scan, mask, depth;
1470 int width, height, shift_control, line_offset, bwidth, bits;
1471 ram_addr_t page0, page1, page_min, page_max;
1472 int disp_width, multi_scan, multi_run;
1473 uint8_t *d;
1474 uint32_t v, addr1, addr;
1475 vga_draw_line_func *vga_draw_line = NULL;
1476 bool share_surface;
1477 pixman_format_code_t format;
1478 #ifdef HOST_WORDS_BIGENDIAN
1479 bool byteswap = !s->big_endian_fb;
1480 #else
1481 bool byteswap = s->big_endian_fb;
1482 #endif
1483
1484 full_update |= update_basic_params(s);
1485
1486 if (!full_update)
1487 vga_sync_dirty_bitmap(s);
1488
1489 s->get_resolution(s, &width, &height);
1490 disp_width = width;
1491
1492 shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3;
1493 double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7);
1494 if (shift_control != 1) {
1495 multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan)
1496 - 1;
1497 } else {
1498 /* in CGA modes, multi_scan is ignored */
1499 /* XXX: is it correct ? */
1500 multi_scan = double_scan;
1501 }
1502 multi_run = multi_scan;
1503 if (shift_control != s->shift_control ||
1504 double_scan != s->double_scan) {
1505 full_update = 1;
1506 s->shift_control = shift_control;
1507 s->double_scan = double_scan;
1508 }
1509
1510 if (shift_control == 0) {
1511 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1512 disp_width <<= 1;
1513 }
1514 } else if (shift_control == 1) {
1515 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1516 disp_width <<= 1;
1517 }
1518 }
1519
1520 depth = s->get_bpp(s);
1521
1522 /*
1523 * Check whether we can share the surface with the backend
1524 * or whether we need a shadow surface. We share native
1525 * endian surfaces for 15bpp and above and byteswapped
1526 * surfaces for 24bpp and above.
1527 */
1528 format = qemu_default_pixman_format(depth, !byteswap);
1529 if (format) {
1530 share_surface = dpy_gfx_check_format(s->con, format)
1531 && !s->force_shadow;
1532 } else {
1533 share_surface = false;
1534 }
1535 if (s->line_offset != s->last_line_offset ||
1536 disp_width != s->last_width ||
1537 height != s->last_height ||
1538 s->last_depth != depth ||
1539 s->last_byteswap != byteswap ||
1540 share_surface != is_buffer_shared(surface)) {
1541 if (share_surface) {
1542 surface = qemu_create_displaysurface_from(disp_width,
1543 height, format, s->line_offset,
1544 s->vram_ptr + (s->start_addr * 4));
1545 dpy_gfx_replace_surface(s->con, surface);
1546 #ifdef DEBUG_VGA
1547 printf("VGA: Using shared surface for depth=%d swap=%d\n",
1548 depth, byteswap);
1549 #endif
1550 } else {
1551 qemu_console_resize(s->con, disp_width, height);
1552 surface = qemu_console_surface(s->con);
1553 #ifdef DEBUG_VGA
1554 printf("VGA: Using shadow surface for depth=%d swap=%d\n",
1555 depth, byteswap);
1556 #endif
1557 }
1558 s->last_scr_width = disp_width;
1559 s->last_scr_height = height;
1560 s->last_width = disp_width;
1561 s->last_height = height;
1562 s->last_line_offset = s->line_offset;
1563 s->last_depth = depth;
1564 s->last_byteswap = byteswap;
1565 full_update = 1;
1566 } else if (is_buffer_shared(surface) &&
1567 (full_update || surface_data(surface) != s->vram_ptr
1568 + (s->start_addr * 4))) {
1569 pixman_format_code_t format =
1570 qemu_default_pixman_format(depth, !byteswap);
1571 surface = qemu_create_displaysurface_from(disp_width,
1572 height, format, s->line_offset,
1573 s->vram_ptr + (s->start_addr * 4));
1574 dpy_gfx_replace_surface(s->con, surface);
1575 }
1576
1577 if (shift_control == 0) {
1578 full_update |= update_palette16(s);
1579 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1580 v = VGA_DRAW_LINE4D2;
1581 } else {
1582 v = VGA_DRAW_LINE4;
1583 }
1584 bits = 4;
1585 } else if (shift_control == 1) {
1586 full_update |= update_palette16(s);
1587 if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) {
1588 v = VGA_DRAW_LINE2D2;
1589 } else {
1590 v = VGA_DRAW_LINE2;
1591 }
1592 bits = 4;
1593 } else {
1594 switch(s->get_bpp(s)) {
1595 default:
1596 case 0:
1597 full_update |= update_palette256(s);
1598 v = VGA_DRAW_LINE8D2;
1599 bits = 4;
1600 break;
1601 case 8:
1602 full_update |= update_palette256(s);
1603 v = VGA_DRAW_LINE8;
1604 bits = 8;
1605 break;
1606 case 15:
1607 v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE;
1608 bits = 16;
1609 break;
1610 case 16:
1611 v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE;
1612 bits = 16;
1613 break;
1614 case 24:
1615 v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE;
1616 bits = 24;
1617 break;
1618 case 32:
1619 v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE;
1620 bits = 32;
1621 break;
1622 }
1623 }
1624 vga_draw_line = vga_draw_line_table[v];
1625
1626 if (!is_buffer_shared(surface) && s->cursor_invalidate) {
1627 s->cursor_invalidate(s);
1628 }
1629
1630 line_offset = s->line_offset;
1631 #if 0
1632 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",
1633 width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE],
1634 s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE));
1635 #endif
1636 addr1 = (s->start_addr * 4);
1637 bwidth = (width * bits + 7) / 8;
1638 y_start = -1;
1639 page_min = -1;
1640 page_max = 0;
1641 d = surface_data(surface);
1642 linesize = surface_stride(surface);
1643 y1 = 0;
1644 for(y = 0; y < height; y++) {
1645 addr = addr1;
1646 if (!(s->cr[VGA_CRTC_MODE] & 1)) {
1647 int shift;
1648 /* CGA compatibility handling */
1649 shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1);
1650 addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
1651 }
1652 if (!(s->cr[VGA_CRTC_MODE] & 2)) {
1653 addr = (addr & ~0x8000) | ((y1 & 2) << 14);
1654 }
1655 update = full_update;
1656 page0 = addr;
1657 page1 = addr + bwidth - 1;
1658 update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
1659 DIRTY_MEMORY_VGA);
1660 /* explicit invalidation for the hardware cursor */
1661 update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
1662 if (update) {
1663 if (y_start < 0)
1664 y_start = y;
1665 if (page0 < page_min)
1666 page_min = page0;
1667 if (page1 > page_max)
1668 page_max = page1;
1669 if (!(is_buffer_shared(surface))) {
1670 vga_draw_line(s, d, s->vram_ptr + addr, width);
1671 if (s->cursor_draw_line)
1672 s->cursor_draw_line(s, d, y);
1673 }
1674 } else {
1675 if (y_start >= 0) {
1676 /* flush to display */
1677 dpy_gfx_update(s->con, 0, y_start,
1678 disp_width, y - y_start);
1679 y_start = -1;
1680 }
1681 }
1682 if (!multi_run) {
1683 mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3;
1684 if ((y1 & mask) == mask)
1685 addr1 += line_offset;
1686 y1++;
1687 multi_run = multi_scan;
1688 } else {
1689 multi_run--;
1690 }
1691 /* line compare acts on the displayed lines */
1692 if (y == s->line_compare)
1693 addr1 = 0;
1694 d += linesize;
1695 }
1696 if (y_start >= 0) {
1697 /* flush to display */
1698 dpy_gfx_update(s->con, 0, y_start,
1699 disp_width, y - y_start);
1700 }
1701 /* reset modified pages */
1702 if (page_max >= page_min) {
1703 memory_region_reset_dirty(&s->vram,
1704 page_min,
1705 page_max - page_min,
1706 DIRTY_MEMORY_VGA);
1707 }
1708 memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
1709 }
1710
1711 static void vga_draw_blank(VGACommonState *s, int full_update)
1712 {
1713 DisplaySurface *surface = qemu_console_surface(s->con);
1714 int i, w;
1715 uint8_t *d;
1716
1717 if (!full_update)
1718 return;
1719 if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
1720 return;
1721
1722 w = s->last_scr_width * surface_bytes_per_pixel(surface);
1723 d = surface_data(surface);
1724 for(i = 0; i < s->last_scr_height; i++) {
1725 memset(d, 0, w);
1726 d += surface_stride(surface);
1727 }
1728 dpy_gfx_update(s->con, 0, 0,
1729 s->last_scr_width, s->last_scr_height);
1730 }
1731
1732 #define GMODE_TEXT 0
1733 #define GMODE_GRAPH 1
1734 #define GMODE_BLANK 2
1735
1736 static void vga_update_display(void *opaque)
1737 {
1738 VGACommonState *s = opaque;
1739 DisplaySurface *surface = qemu_console_surface(s->con);
1740 int full_update, graphic_mode;
1741
1742 qemu_flush_coalesced_mmio_buffer();
1743
1744 if (surface_bits_per_pixel(surface) == 0) {
1745 /* nothing to do */
1746 } else {
1747 full_update = 0;
1748 if (!(s->ar_index & 0x20)) {
1749 graphic_mode = GMODE_BLANK;
1750 } else {
1751 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1752 }
1753 if (graphic_mode != s->graphic_mode) {
1754 s->graphic_mode = graphic_mode;
1755 s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1756 full_update = 1;
1757 }
1758 switch(graphic_mode) {
1759 case GMODE_TEXT:
1760 vga_draw_text(s, full_update);
1761 break;
1762 case GMODE_GRAPH:
1763 vga_draw_graphic(s, full_update);
1764 break;
1765 case GMODE_BLANK:
1766 default:
1767 vga_draw_blank(s, full_update);
1768 break;
1769 }
1770 }
1771 }
1772
1773 /* force a full display refresh */
1774 static void vga_invalidate_display(void *opaque)
1775 {
1776 VGACommonState *s = opaque;
1777
1778 s->last_width = -1;
1779 s->last_height = -1;
1780 }
1781
1782 void vga_common_reset(VGACommonState *s)
1783 {
1784 s->sr_index = 0;
1785 memset(s->sr, '\0', sizeof(s->sr));
1786 memset(s->sr_vbe, '\0', sizeof(s->sr_vbe));
1787 s->gr_index = 0;
1788 memset(s->gr, '\0', sizeof(s->gr));
1789 s->ar_index = 0;
1790 memset(s->ar, '\0', sizeof(s->ar));
1791 s->ar_flip_flop = 0;
1792 s->cr_index = 0;
1793 memset(s->cr, '\0', sizeof(s->cr));
1794 s->msr = 0;
1795 s->fcr = 0;
1796 s->st00 = 0;
1797 s->st01 = 0;
1798 s->dac_state = 0;
1799 s->dac_sub_index = 0;
1800 s->dac_read_index = 0;
1801 s->dac_write_index = 0;
1802 memset(s->dac_cache, '\0', sizeof(s->dac_cache));
1803 s->dac_8bit = 0;
1804 memset(s->palette, '\0', sizeof(s->palette));
1805 s->bank_offset = 0;
1806 s->vbe_index = 0;
1807 memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
1808 s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
1809 s->vbe_start_addr = 0;
1810 s->vbe_line_offset = 0;
1811 s->vbe_bank_mask = (s->vram_size >> 16) - 1;
1812 memset(s->font_offsets, '\0', sizeof(s->font_offsets));
1813 s->graphic_mode = -1; /* force full update */
1814 s->shift_control = 0;
1815 s->double_scan = 0;
1816 s->line_offset = 0;
1817 s->line_compare = 0;
1818 s->start_addr = 0;
1819 s->plane_updated = 0;
1820 s->last_cw = 0;
1821 s->last_ch = 0;
1822 s->last_width = 0;
1823 s->last_height = 0;
1824 s->last_scr_width = 0;
1825 s->last_scr_height = 0;
1826 s->cursor_start = 0;
1827 s->cursor_end = 0;
1828 s->cursor_offset = 0;
1829 s->big_endian_fb = s->default_endian_fb;
1830 memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
1831 memset(s->last_palette, '\0', sizeof(s->last_palette));
1832 memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
1833 switch (vga_retrace_method) {
1834 case VGA_RETRACE_DUMB:
1835 break;
1836 case VGA_RETRACE_PRECISE:
1837 memset(&s->retrace_info, 0, sizeof (s->retrace_info));
1838 break;
1839 }
1840 vga_update_memory_access(s);
1841 }
1842
1843 static void vga_reset(void *opaque)
1844 {
1845 VGACommonState *s = opaque;
1846 vga_common_reset(s);
1847 }
1848
1849 #define TEXTMODE_X(x) ((x) % width)
1850 #define TEXTMODE_Y(x) ((x) / width)
1851 #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
1852 ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
1853 /* relay text rendering to the display driver
1854 * instead of doing a full vga_update_display() */
1855 static void vga_update_text(void *opaque, console_ch_t *chardata)
1856 {
1857 VGACommonState *s = opaque;
1858 int graphic_mode, i, cursor_offset, cursor_visible;
1859 int cw, cheight, width, height, size, c_min, c_max;
1860 uint32_t *src;
1861 console_ch_t *dst, val;
1862 char msg_buffer[80];
1863 int full_update = 0;
1864
1865 qemu_flush_coalesced_mmio_buffer();
1866
1867 if (!(s->ar_index & 0x20)) {
1868 graphic_mode = GMODE_BLANK;
1869 } else {
1870 graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE;
1871 }
1872 if (graphic_mode != s->graphic_mode) {
1873 s->graphic_mode = graphic_mode;
1874 full_update = 1;
1875 }
1876 if (s->last_width == -1) {
1877 s->last_width = 0;
1878 full_update = 1;
1879 }
1880
1881 switch (graphic_mode) {
1882 case GMODE_TEXT:
1883 /* TODO: update palette */
1884 full_update |= update_basic_params(s);
1885
1886 /* total width & height */
1887 cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1;
1888 cw = 8;
1889 if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) {
1890 cw = 9;
1891 }
1892 if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) {
1893 cw = 16; /* NOTE: no 18 pixel wide */
1894 }
1895 width = (s->cr[VGA_CRTC_H_DISP] + 1);
1896 if (s->cr[VGA_CRTC_V_TOTAL] == 100) {
1897 /* ugly hack for CGA 160x100x16 - explain me the logic */
1898 height = 100;
1899 } else {
1900 height = s->cr[VGA_CRTC_V_DISP_END] |
1901 ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) |
1902 ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3);
1903 height = (height + 1) / cheight;
1904 }
1905
1906 size = (height * width);
1907 if (size > CH_ATTR_SIZE) {
1908 if (!full_update)
1909 return;
1910
1911 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
1912 width, height);
1913 break;
1914 }
1915
1916 if (width != s->last_width || height != s->last_height ||
1917 cw != s->last_cw || cheight != s->last_ch) {
1918 s->last_scr_width = width * cw;
1919 s->last_scr_height = height * cheight;
1920 qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height);
1921 dpy_text_resize(s->con, width, height);
1922 s->last_depth = 0;
1923 s->last_width = width;
1924 s->last_height = height;
1925 s->last_ch = cheight;
1926 s->last_cw = cw;
1927 full_update = 1;
1928 }
1929
1930 if (full_update) {
1931 s->full_update_gfx = 1;
1932 }
1933 if (s->full_update_text) {
1934 s->full_update_text = 0;
1935 full_update |= 1;
1936 }
1937
1938 /* Update "hardware" cursor */
1939 cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) |
1940 s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr;
1941 if (cursor_offset != s->cursor_offset ||
1942 s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start ||
1943 s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) {
1944 cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20);
1945 if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
1946 dpy_text_cursor(s->con,
1947 TEXTMODE_X(cursor_offset),
1948 TEXTMODE_Y(cursor_offset));
1949 else
1950 dpy_text_cursor(s->con, -1, -1);
1951 s->cursor_offset = cursor_offset;
1952 s->cursor_start = s->cr[VGA_CRTC_CURSOR_START];
1953 s->cursor_end = s->cr[VGA_CRTC_CURSOR_END];
1954 }
1955
1956 src = (uint32_t *) s->vram_ptr + s->start_addr;
1957 dst = chardata;
1958
1959 if (full_update) {
1960 for (i = 0; i < size; src ++, dst ++, i ++)
1961 console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
1962
1963 dpy_text_update(s->con, 0, 0, width, height);
1964 } else {
1965 c_max = 0;
1966
1967 for (i = 0; i < size; src ++, dst ++, i ++) {
1968 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1969 if (*dst != val) {
1970 *dst = val;
1971 c_max = i;
1972 break;
1973 }
1974 }
1975 c_min = i;
1976 for (; i < size; src ++, dst ++, i ++) {
1977 console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
1978 if (*dst != val) {
1979 *dst = val;
1980 c_max = i;
1981 }
1982 }
1983
1984 if (c_min <= c_max) {
1985 i = TEXTMODE_Y(c_min);
1986 dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
1987 }
1988 }
1989
1990 return;
1991 case GMODE_GRAPH:
1992 if (!full_update)
1993 return;
1994
1995 s->get_resolution(s, &width, &height);
1996 snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
1997 width, height);
1998 break;
1999 case GMODE_BLANK:
2000 default:
2001 if (!full_update)
2002 return;
2003
2004 snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
2005 break;
2006 }
2007
2008 /* Display a message */
2009 s->last_width = 60;
2010 s->last_height = height = 3;
2011 dpy_text_cursor(s->con, -1, -1);
2012 dpy_text_resize(s->con, s->last_width, height);
2013
2014 for (dst = chardata, i = 0; i < s->last_width * height; i ++)
2015 console_write_ch(dst ++, ' ');
2016
2017 size = strlen(msg_buffer);
2018 width = (s->last_width - size) / 2;
2019 dst = chardata + s->last_width + width;
2020 for (i = 0; i < size; i ++)
2021 console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE,
2022 QEMU_COLOR_BLACK, 1));
2023
2024 dpy_text_update(s->con, 0, 0, s->last_width, height);
2025 }
2026
2027 static uint64_t vga_mem_read(void *opaque, hwaddr addr,
2028 unsigned size)
2029 {
2030 VGACommonState *s = opaque;
2031
2032 return vga_mem_readb(s, addr);
2033 }
2034
2035 static void vga_mem_write(void *opaque, hwaddr addr,
2036 uint64_t data, unsigned size)
2037 {
2038 VGACommonState *s = opaque;
2039
2040 vga_mem_writeb(s, addr, data);
2041 }
2042
2043 const MemoryRegionOps vga_mem_ops = {
2044 .read = vga_mem_read,
2045 .write = vga_mem_write,
2046 .endianness = DEVICE_LITTLE_ENDIAN,
2047 .impl = {
2048 .min_access_size = 1,
2049 .max_access_size = 1,
2050 },
2051 };
2052
2053 static int vga_common_post_load(void *opaque, int version_id)
2054 {
2055 VGACommonState *s = opaque;
2056
2057 /* force refresh */
2058 s->graphic_mode = -1;
2059 vbe_update_vgaregs(s);
2060 return 0;
2061 }
2062
2063 static bool vga_endian_state_needed(void *opaque)
2064 {
2065 VGACommonState *s = opaque;
2066
2067 /*
2068 * Only send the endian state if it's different from the
2069 * default one, thus ensuring backward compatibility for
2070 * migration of the common case
2071 */
2072 return s->default_endian_fb != s->big_endian_fb;
2073 }
2074
2075 static const VMStateDescription vmstate_vga_endian = {
2076 .name = "vga.endian",
2077 .version_id = 1,
2078 .minimum_version_id = 1,
2079 .needed = vga_endian_state_needed,
2080 .fields = (VMStateField[]) {
2081 VMSTATE_BOOL(big_endian_fb, VGACommonState),
2082 VMSTATE_END_OF_LIST()
2083 }
2084 };
2085
2086 const VMStateDescription vmstate_vga_common = {
2087 .name = "vga",
2088 .version_id = 2,
2089 .minimum_version_id = 2,
2090 .post_load = vga_common_post_load,
2091 .fields = (VMStateField[]) {
2092 VMSTATE_UINT32(latch, VGACommonState),
2093 VMSTATE_UINT8(sr_index, VGACommonState),
2094 VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
2095 VMSTATE_UINT8(gr_index, VGACommonState),
2096 VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
2097 VMSTATE_UINT8(ar_index, VGACommonState),
2098 VMSTATE_BUFFER(ar, VGACommonState),
2099 VMSTATE_INT32(ar_flip_flop, VGACommonState),
2100 VMSTATE_UINT8(cr_index, VGACommonState),
2101 VMSTATE_BUFFER(cr, VGACommonState),
2102 VMSTATE_UINT8(msr, VGACommonState),
2103 VMSTATE_UINT8(fcr, VGACommonState),
2104 VMSTATE_UINT8(st00, VGACommonState),
2105 VMSTATE_UINT8(st01, VGACommonState),
2106
2107 VMSTATE_UINT8(dac_state, VGACommonState),
2108 VMSTATE_UINT8(dac_sub_index, VGACommonState),
2109 VMSTATE_UINT8(dac_read_index, VGACommonState),
2110 VMSTATE_UINT8(dac_write_index, VGACommonState),
2111 VMSTATE_BUFFER(dac_cache, VGACommonState),
2112 VMSTATE_BUFFER(palette, VGACommonState),
2113
2114 VMSTATE_INT32(bank_offset, VGACommonState),
2115 VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
2116 VMSTATE_UINT16(vbe_index, VGACommonState),
2117 VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
2118 VMSTATE_UINT32(vbe_start_addr, VGACommonState),
2119 VMSTATE_UINT32(vbe_line_offset, VGACommonState),
2120 VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
2121 VMSTATE_END_OF_LIST()
2122 },
2123 .subsections = (const VMStateDescription*[]) {
2124 &vmstate_vga_endian,
2125 NULL
2126 }
2127 };
2128
2129 static const GraphicHwOps vga_ops = {
2130 .invalidate = vga_invalidate_display,
2131 .gfx_update = vga_update_display,
2132 .text_update = vga_update_text,
2133 };
2134
2135 static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
2136 {
2137 if (val < vmin) {
2138 return vmin;
2139 }
2140 if (val > vmax) {
2141 return vmax;
2142 }
2143 return val;
2144 }
2145
2146 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
2147 {
2148 int i, j, v, b;
2149
2150 for(i = 0;i < 256; i++) {
2151 v = 0;
2152 for(j = 0; j < 8; j++) {
2153 v |= ((i >> j) & 1) << (j * 4);
2154 }
2155 expand4[i] = v;
2156
2157 v = 0;
2158 for(j = 0; j < 4; j++) {
2159 v |= ((i >> (2 * j)) & 3) << (j * 4);
2160 }
2161 expand2[i] = v;
2162 }
2163 for(i = 0; i < 16; i++) {
2164 v = 0;
2165 for(j = 0; j < 4; j++) {
2166 b = ((i >> j) & 1);
2167 v |= b << (2 * j);
2168 v |= b << (2 * j + 1);
2169 }
2170 expand4to8[i] = v;
2171 }
2172
2173 s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
2174 s->vram_size_mb = pow2ceil(s->vram_size_mb);
2175 s->vram_size = s->vram_size_mb << 20;
2176
2177 if (!s->vbe_size) {
2178 s->vbe_size = s->vram_size;
2179 }
2180
2181 s->is_vbe_vmstate = 1;
2182 memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size,
2183 &error_fatal);
2184 vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
2185 xen_register_framebuffer(&s->vram);
2186 s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
2187 s->get_bpp = vga_get_bpp;
2188 s->get_offsets = vga_get_offsets;
2189 s->get_resolution = vga_get_resolution;
2190 s->hw_ops = &vga_ops;
2191 switch (vga_retrace_method) {
2192 case VGA_RETRACE_DUMB:
2193 s->retrace = vga_dumb_retrace;
2194 s->update_retrace_info = vga_dumb_update_retrace_info;
2195 break;
2196
2197 case VGA_RETRACE_PRECISE:
2198 s->retrace = vga_precise_retrace;
2199 s->update_retrace_info = vga_precise_update_retrace_info;
2200 break;
2201 }
2202
2203 /*
2204 * Set default fb endian based on target, could probably be turned
2205 * into a device attribute set by the machine/platform to remove
2206 * all target endian dependencies from this file.
2207 */
2208 #ifdef TARGET_WORDS_BIGENDIAN
2209 s->default_endian_fb = true;
2210 #else
2211 s->default_endian_fb = false;
2212 #endif
2213 vga_dirty_log_start(s);
2214 }
2215
2216 static const MemoryRegionPortio vga_portio_list[] = {
2217 { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */
2218 { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */
2219 { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */
2220 { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */
2221 { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */
2222 PORTIO_END_OF_LIST(),
2223 };
2224
2225 static const MemoryRegionPortio vbe_portio_list[] = {
2226 { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index },
2227 # ifdef TARGET_I386
2228 { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2229 # endif
2230 { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data },
2231 PORTIO_END_OF_LIST(),
2232 };
2233
2234 /* Used by both ISA and PCI */
2235 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
2236 const MemoryRegionPortio **vga_ports,
2237 const MemoryRegionPortio **vbe_ports)
2238 {
2239 MemoryRegion *vga_mem;
2240
2241 *vga_ports = vga_portio_list;
2242 *vbe_ports = vbe_portio_list;
2243
2244 vga_mem = g_malloc(sizeof(*vga_mem));
2245 memory_region_init_io(vga_mem, obj, &vga_mem_ops, s,
2246 "vga-lowmem", 0x20000);
2247 memory_region_set_flush_coalesced(vga_mem);
2248
2249 return vga_mem;
2250 }
2251
2252 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
2253 MemoryRegion *address_space_io, bool init_vga_ports)
2254 {
2255 MemoryRegion *vga_io_memory;
2256 const MemoryRegionPortio *vga_ports, *vbe_ports;
2257
2258 qemu_register_reset(vga_reset, s);
2259
2260 s->bank_offset = 0;
2261
2262 s->legacy_address_space = address_space;
2263
2264 vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports);
2265 memory_region_add_subregion_overlap(address_space,
2266 0x000a0000,
2267 vga_io_memory,
2268 1);
2269 memory_region_set_coalescing(vga_io_memory);
2270 if (init_vga_ports) {
2271 portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
2272 portio_list_set_flush_coalesced(&s->vga_port_list);
2273 portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
2274 }
2275 if (vbe_ports) {
2276 portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
2277 portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
2278 }
2279 }
2280
2281 void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory)
2282 {
2283 /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
2284 * so use an alias to avoid double-mapping the same region.
2285 */
2286 memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe",
2287 &s->vram, 0, memory_region_size(&s->vram));
2288 /* XXX: use optimized standard vga accesses */
2289 memory_region_add_subregion(system_memory,
2290 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
2291 &s->vram_vbe);
2292 s->vbe_mapped = 1;
2293 }
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