src/gba/gba.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "gba.h"
7
8#include "gba/bios.h"
9#include "gba/cheats.h"
10#include "gba/io.h"
11#include "gba/supervisor/rr.h"
12#include "gba/supervisor/thread.h"
13#include "gba/serialize.h"
14#include "gba/sio.h"
15
16#include "isa-inlines.h"
17
18#include "util/crc32.h"
19#include "util/memory.h"
20#include "util/patch.h"
21#include "util/vfs.h"
22
23const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
24const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
25
26static const size_t GBA_ROM_MAGIC_OFFSET = 3;
27static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
28
29static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
30static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
31static void GBAProcessEvents(struct ARMCore* cpu);
32static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
33static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
34static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
35static void GBABreakpoint(struct ARMCore* cpu, int immediate);
36
37static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
38static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
39
40void GBACreate(struct GBA* gba) {
41 gba->d.id = GBA_COMPONENT_MAGIC;
42 gba->d.init = GBAInit;
43 gba->d.deinit = 0;
44}
45
46static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
47 struct GBA* gba = (struct GBA*) component;
48 gba->cpu = cpu;
49 gba->debugger = 0;
50 gba->sync = 0;
51
52 GBAInterruptHandlerInit(&cpu->irqh);
53 GBAMemoryInit(gba);
54 GBASavedataInit(&gba->memory.savedata, 0);
55
56 gba->video.p = gba;
57 GBAVideoInit(&gba->video);
58
59 gba->audio.p = gba;
60 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
61
62 GBAIOInit(gba);
63
64 gba->sio.p = gba;
65 GBASIOInit(&gba->sio);
66
67 gba->timersEnabled = 0;
68 memset(gba->timers, 0, sizeof(gba->timers));
69
70 gba->springIRQ = 0;
71 gba->keySource = 0;
72 gba->rotationSource = 0;
73 gba->luminanceSource = 0;
74 gba->rtcSource = 0;
75 gba->rumble = 0;
76 gba->rr = 0;
77
78 gba->romVf = 0;
79 gba->biosVf = 0;
80
81 gba->logHandler = 0;
82 gba->logLevel = GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
83 gba->stream = 0;
84 gba->keyCallback = 0;
85 gba->stopCallback = 0;
86
87 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
88
89 gba->idleOptimization = IDLE_LOOP_REMOVE;
90 gba->idleLoop = IDLE_LOOP_NONE;
91 gba->lastJump = 0;
92 gba->haltPending = false;
93 gba->idleDetectionStep = 0;
94 gba->idleDetectionFailures = 0;
95
96 gba->realisticTiming = true;
97 gba->hardCrash = true;
98
99 gba->performingDMA = false;
100}
101
102void GBAUnloadROM(struct GBA* gba) {
103 if (gba->memory.rom && gba->pristineRom != gba->memory.rom) {
104 if (gba->yankedRomSize) {
105 gba->yankedRomSize = 0;
106 }
107 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
108 }
109 gba->memory.rom = 0;
110
111 if (gba->romVf) {
112 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
113 gba->pristineRom = 0;
114 gba->romVf = 0;
115 }
116}
117
118void GBADestroy(struct GBA* gba) {
119 GBAUnloadROM(gba);
120
121 if (gba->biosVf) {
122 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
123 }
124
125 GBAMemoryDeinit(gba);
126 GBAVideoDeinit(&gba->video);
127 GBAAudioDeinit(&gba->audio);
128 GBASIODeinit(&gba->sio);
129 gba->rr = 0;
130}
131
132void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
133 irqh->reset = GBAReset;
134 irqh->processEvents = GBAProcessEvents;
135 irqh->swi16 = GBASwi16;
136 irqh->swi32 = GBASwi32;
137 irqh->hitIllegal = GBAIllegal;
138 irqh->readCPSR = GBATestIRQ;
139 irqh->hitStub = GBAHitStub;
140 irqh->bkpt16 = GBABreakpoint;
141 irqh->bkpt32 = GBABreakpoint;
142}
143
144void GBAReset(struct ARMCore* cpu) {
145 ARMSetPrivilegeMode(cpu, MODE_IRQ);
146 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
147 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
148 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
149 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
150 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
151
152 struct GBA* gba = (struct GBA*) cpu->master;
153 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
154 GBASavedataUnmask(&gba->memory.savedata);
155 }
156
157 if (gba->yankedRomSize) {
158 gba->memory.romSize = gba->yankedRomSize;
159 gba->yankedRomSize = 0;
160 }
161 GBAMemoryReset(gba);
162 GBAVideoReset(&gba->video);
163 GBAAudioReset(&gba->audio);
164 GBAIOInit(gba);
165
166 GBASIODeinit(&gba->sio);
167 GBASIOInit(&gba->sio);
168
169 gba->timersEnabled = 0;
170 memset(gba->timers, 0, sizeof(gba->timers));
171}
172
173void GBASkipBIOS(struct ARMCore* cpu) {
174 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
175 cpu->gprs[ARM_PC] = BASE_CART0;
176 int currentCycles = 0;
177 ARM_WRITE_PC;
178 }
179}
180
181static void GBAProcessEvents(struct ARMCore* cpu) {
182 do {
183 struct GBA* gba = (struct GBA*) cpu->master;
184 int32_t cycles = cpu->nextEvent;
185 int32_t nextEvent = INT_MAX;
186 int32_t testEvent;
187#ifndef NDEBUG
188 if (cycles < 0) {
189 GBALog(gba, GBA_LOG_FATAL, "Negative cycles passed: %i", cycles);
190 }
191#endif
192
193 gba->bus = cpu->prefetch[1];
194 if (cpu->executionMode == MODE_THUMB) {
195 gba->bus |= cpu->prefetch[1] << 16;
196 }
197
198 if (gba->springIRQ) {
199 ARMRaiseIRQ(cpu);
200 gba->springIRQ = 0;
201 }
202
203 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
204 if (testEvent < nextEvent) {
205 nextEvent = testEvent;
206 }
207
208 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
209 if (testEvent < nextEvent) {
210 nextEvent = testEvent;
211 }
212
213 testEvent = GBATimersProcessEvents(gba, cycles);
214 if (testEvent < nextEvent) {
215 nextEvent = testEvent;
216 }
217
218 testEvent = GBAMemoryRunDMAs(gba, cycles);
219 if (testEvent < nextEvent) {
220 nextEvent = testEvent;
221 }
222
223 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
224 if (testEvent < nextEvent) {
225 nextEvent = testEvent;
226 }
227
228 cpu->cycles -= cycles;
229 cpu->nextEvent = nextEvent;
230
231 if (cpu->halted) {
232 cpu->cycles = cpu->nextEvent;
233 }
234 } while (cpu->cycles >= cpu->nextEvent);
235}
236
237static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
238 int32_t nextEvent = INT_MAX;
239 if (gba->timersEnabled) {
240 struct GBATimer* timer;
241 struct GBATimer* nextTimer;
242
243 timer = &gba->timers[0];
244 if (timer->enable) {
245 timer->nextEvent -= cycles;
246 timer->lastEvent -= cycles;
247 while (timer->nextEvent <= 0) {
248 timer->lastEvent = timer->nextEvent;
249 timer->nextEvent += timer->overflowInterval;
250 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
251 timer->oldReload = timer->reload;
252
253 if (timer->doIrq) {
254 GBARaiseIRQ(gba, IRQ_TIMER0);
255 }
256
257 if (gba->audio.enable) {
258 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
259 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
260 }
261
262 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
263 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
264 }
265 }
266
267 nextTimer = &gba->timers[1];
268 if (nextTimer->countUp) {
269 ++gba->memory.io[REG_TM1CNT_LO >> 1];
270 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
271 nextTimer->nextEvent = 0;
272 }
273 }
274 }
275 nextEvent = timer->nextEvent;
276 }
277
278 timer = &gba->timers[1];
279 if (timer->enable) {
280 timer->nextEvent -= cycles;
281 timer->lastEvent -= cycles;
282 if (timer->nextEvent <= 0) {
283 timer->lastEvent = timer->nextEvent;
284 timer->nextEvent += timer->overflowInterval;
285 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
286 timer->oldReload = timer->reload;
287
288 if (timer->doIrq) {
289 GBARaiseIRQ(gba, IRQ_TIMER1);
290 }
291
292 if (gba->audio.enable) {
293 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
294 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
295 }
296
297 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
298 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
299 }
300 }
301
302 if (timer->countUp) {
303 timer->nextEvent = INT_MAX;
304 }
305
306 nextTimer = &gba->timers[2];
307 if (nextTimer->countUp) {
308 ++gba->memory.io[REG_TM2CNT_LO >> 1];
309 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
310 nextTimer->nextEvent = 0;
311 }
312 }
313 }
314 if (timer->nextEvent < nextEvent) {
315 nextEvent = timer->nextEvent;
316 }
317 }
318
319 timer = &gba->timers[2];
320 if (timer->enable) {
321 timer->nextEvent -= cycles;
322 timer->lastEvent -= cycles;
323 if (timer->nextEvent <= 0) {
324 timer->lastEvent = timer->nextEvent;
325 timer->nextEvent += timer->overflowInterval;
326 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
327 timer->oldReload = timer->reload;
328
329 if (timer->doIrq) {
330 GBARaiseIRQ(gba, IRQ_TIMER2);
331 }
332
333 if (timer->countUp) {
334 timer->nextEvent = INT_MAX;
335 }
336
337 nextTimer = &gba->timers[3];
338 if (nextTimer->countUp) {
339 ++gba->memory.io[REG_TM3CNT_LO >> 1];
340 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
341 nextTimer->nextEvent = 0;
342 }
343 }
344 }
345 if (timer->nextEvent < nextEvent) {
346 nextEvent = timer->nextEvent;
347 }
348 }
349
350 timer = &gba->timers[3];
351 if (timer->enable) {
352 timer->nextEvent -= cycles;
353 timer->lastEvent -= cycles;
354 if (timer->nextEvent <= 0) {
355 timer->lastEvent = timer->nextEvent;
356 timer->nextEvent += timer->overflowInterval;
357 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
358 timer->oldReload = timer->reload;
359
360 if (timer->doIrq) {
361 GBARaiseIRQ(gba, IRQ_TIMER3);
362 }
363
364 if (timer->countUp) {
365 timer->nextEvent = INT_MAX;
366 }
367 }
368 if (timer->nextEvent < nextEvent) {
369 nextEvent = timer->nextEvent;
370 }
371 }
372 }
373 return nextEvent;
374}
375
376void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
377 debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
378 debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
379 gba->debugger = debugger;
380 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
381 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
382}
383
384void GBADetachDebugger(struct GBA* gba) {
385 gba->debugger = 0;
386 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
387 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
388}
389
390void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
391 GBAUnloadROM(gba);
392 gba->romVf = vf;
393 gba->pristineRomSize = vf->size(vf);
394 vf->seek(vf, 0, SEEK_SET);
395 if (gba->pristineRomSize > SIZE_CART0) {
396 gba->pristineRomSize = SIZE_CART0;
397 }
398 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
399 if (!gba->pristineRom) {
400 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
401 return;
402 }
403 gba->yankedRomSize = 0;
404 gba->memory.rom = gba->pristineRom;
405 gba->activeFile = fname;
406 gba->memory.romSize = gba->pristineRomSize;
407 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
408 GBASavedataInit(&gba->memory.savedata, sav);
409 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
410 // TODO: error check
411}
412
413void GBAYankROM(struct GBA* gba) {
414 gba->yankedRomSize = gba->memory.romSize;
415 gba->memory.romSize = 0;
416 GBARaiseIRQ(gba, IRQ_GAMEPAK);
417}
418
419void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
420 gba->biosVf = vf;
421 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
422 if (!bios) {
423 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
424 return;
425 }
426 gba->memory.bios = bios;
427 gba->memory.fullBios = 1;
428 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
429 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
430 if (checksum == GBA_BIOS_CHECKSUM) {
431 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
432 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
433 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
434 } else {
435 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
436 }
437 gba->biosChecksum = checksum;
438 if (gba->memory.activeRegion == REGION_BIOS) {
439 gba->cpu->memory.activeRegion = gba->memory.bios;
440 }
441 // TODO: error check
442}
443
444void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
445 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
446 if (!patchedSize || patchedSize > SIZE_CART0) {
447 return;
448 }
449 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
450 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
451 mappedMemoryFree(gba->memory.rom, patchedSize);
452 gba->memory.rom = gba->pristineRom;
453 return;
454 }
455 gba->memory.romSize = patchedSize;
456 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
457}
458
459void GBATimerUpdateRegister(struct GBA* gba, int timer) {
460 struct GBATimer* currentTimer = &gba->timers[timer];
461 if (currentTimer->enable && !currentTimer->countUp) {
462 int32_t prefetchSkew = 0;
463 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
464 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
465 }
466 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
467 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> currentTimer->prescaleBits);
468 }
469}
470
471void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
472 gba->timers[timer].reload = reload;
473 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
474}
475
476void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
477 struct GBATimer* currentTimer = &gba->timers[timer];
478 GBATimerUpdateRegister(gba, timer);
479
480 int oldPrescale = currentTimer->prescaleBits;
481 switch (control & 0x0003) {
482 case 0x0000:
483 currentTimer->prescaleBits = 0;
484 break;
485 case 0x0001:
486 currentTimer->prescaleBits = 6;
487 break;
488 case 0x0002:
489 currentTimer->prescaleBits = 8;
490 break;
491 case 0x0003:
492 currentTimer->prescaleBits = 10;
493 break;
494 }
495 currentTimer->countUp = !!(control & 0x0004);
496 currentTimer->doIrq = !!(control & 0x0040);
497 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
498 int wasEnabled = currentTimer->enable;
499 currentTimer->enable = !!(control & 0x0080);
500 if (!wasEnabled && currentTimer->enable) {
501 if (!currentTimer->countUp) {
502 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
503 } else {
504 currentTimer->nextEvent = INT_MAX;
505 }
506 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
507 currentTimer->oldReload = currentTimer->reload;
508 currentTimer->lastEvent = gba->cpu->cycles;
509 gba->timersEnabled |= 1 << timer;
510 } else if (wasEnabled && !currentTimer->enable) {
511 if (!currentTimer->countUp) {
512 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
513 }
514 gba->timersEnabled &= ~(1 << timer);
515 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
516 // FIXME: this might be before present
517 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
518 }
519
520 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
521 gba->cpu->nextEvent = currentTimer->nextEvent;
522 }
523};
524
525void GBAWriteIE(struct GBA* gba, uint16_t value) {
526 if (value & (1 << IRQ_KEYPAD)) {
527 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
528 }
529
530 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
531 ARMRaiseIRQ(gba->cpu);
532 }
533}
534
535void GBAWriteIME(struct GBA* gba, uint16_t value) {
536 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
537 ARMRaiseIRQ(gba->cpu);
538 }
539}
540
541void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
542 gba->memory.io[REG_IF >> 1] |= 1 << irq;
543 gba->cpu->halted = 0;
544
545 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
546 ARMRaiseIRQ(gba->cpu);
547 }
548}
549
550void GBATestIRQ(struct ARMCore* cpu) {
551 struct GBA* gba = (struct GBA*) cpu->master;
552 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
553 gba->springIRQ = 1;
554 gba->cpu->nextEvent = 0;
555 }
556}
557
558void GBAHalt(struct GBA* gba) {
559 gba->cpu->nextEvent = 0;
560 gba->cpu->halted = 1;
561}
562
563void GBAStop(struct GBA* gba) {
564 if (!gba->stopCallback) {
565 return;
566 }
567 gba->cpu->nextEvent = 0;
568 gba->stopCallback->stop(gba->stopCallback);
569}
570
571static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
572 struct GBAThread* threadContext = GBAThreadGetContext();
573 enum GBALogLevel logLevel = GBA_LOG_ALL;
574
575 if (gba) {
576 logLevel = gba->logLevel;
577 }
578
579 if (threadContext) {
580 logLevel = threadContext->logLevel;
581 gba = threadContext->gba;
582 }
583
584 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
585 return;
586 }
587
588 if (level == GBA_LOG_FATAL && gba) {
589 gba->cpu->nextEvent = 0;
590 }
591
592 if (threadContext) {
593 if (level == GBA_LOG_FATAL) {
594 MutexLock(&threadContext->stateMutex);
595 threadContext->state = THREAD_CRASHED;
596 MutexUnlock(&threadContext->stateMutex);
597 }
598 }
599 if (gba && gba->logHandler) {
600 gba->logHandler(threadContext, level, format, args);
601 return;
602 }
603
604 vprintf(format, args);
605 printf("\n");
606
607 if (level == GBA_LOG_FATAL && !threadContext) {
608 abort();
609 }
610}
611
612void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
613 va_list args;
614 va_start(args, format);
615 _GBAVLog(gba, level, format, args);
616 va_end(args);
617}
618
619void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
620 struct GBA* gba = 0;
621 if (debugger->cpu) {
622 gba = (struct GBA*) debugger->cpu->master;
623 }
624
625 enum GBALogLevel gbaLevel;
626 switch (level) {
627 default: // Avoids compiler warning
628 case DEBUGGER_LOG_DEBUG:
629 gbaLevel = GBA_LOG_DEBUG;
630 break;
631 case DEBUGGER_LOG_INFO:
632 gbaLevel = GBA_LOG_INFO;
633 break;
634 case DEBUGGER_LOG_WARN:
635 gbaLevel = GBA_LOG_WARN;
636 break;
637 case DEBUGGER_LOG_ERROR:
638 gbaLevel = GBA_LOG_ERROR;
639 break;
640 }
641 va_list args;
642 va_start(args, format);
643 _GBAVLog(gba, gbaLevel, format, args);
644 va_end(args);
645}
646
647bool GBAIsROM(struct VFile* vf) {
648 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
649 return false;
650 }
651 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
652 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
653 return false;
654 }
655 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
656}
657
658bool GBAIsBIOS(struct VFile* vf) {
659 if (vf->seek(vf, 0, SEEK_SET) < 0) {
660 return false;
661 }
662 uint32_t interruptTable[7];
663 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
664 return false;
665 }
666 int i;
667 for (i = 0; i < 7; ++i) {
668 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
669 return false;
670 }
671 }
672 return true;
673}
674
675void GBAGetGameCode(struct GBA* gba, char* out) {
676 if (!gba->memory.rom) {
677 out[0] = '\0';
678 return;
679 }
680 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
681}
682
683void GBAGetGameTitle(struct GBA* gba, char* out) {
684 if (!gba->memory.rom) {
685 strncpy(out, "(BIOS)", 12);
686 return;
687 }
688 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
689}
690
691void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
692 struct GBA* gba = (struct GBA*) cpu->master;
693 enum GBALogLevel level = GBA_LOG_ERROR;
694 if (gba->debugger) {
695 level = GBA_LOG_STUB;
696 struct DebuggerEntryInfo info = {
697 .address = _ARMPCAddress(cpu),
698 .opcode = opcode
699 };
700 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
701 }
702 GBALog(gba, level, "Stub opcode: %08x", opcode);
703}
704
705void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
706 struct GBA* gba = (struct GBA*) cpu->master;
707 if (!gba->yankedRomSize) {
708 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
709 }
710 if (gba->debugger) {
711 struct DebuggerEntryInfo info = {
712 .address = _ARMPCAddress(cpu),
713 .opcode = opcode
714 };
715 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
716 } else {
717 ARMRaiseUndefined(cpu);
718 }
719}
720
721void GBABreakpoint(struct ARMCore* cpu, int immediate) {
722 struct GBA* gba = (struct GBA*) cpu->master;
723 if (immediate >= GBA_COMPONENT_MAX) {
724 return;
725 }
726 switch (immediate) {
727 case GBA_COMPONENT_DEBUGGER:
728 if (gba->debugger) {
729 struct DebuggerEntryInfo info = {
730 .address = _ARMPCAddress(cpu)
731 };
732 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
733 }
734 break;
735 case GBA_COMPONENT_CHEAT_DEVICE:
736 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
737 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
738 struct GBACheatHook* hook = 0;
739 size_t i;
740 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
741 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
742 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
743 GBACheatRefresh(device, cheats);
744 hook = cheats->hook;
745 }
746 }
747 if (hook) {
748 ARMRunFake(cpu, hook->patchedOpcode);
749 }
750 }
751 break;
752 default:
753 break;
754 }
755}
756
757void GBAFrameStarted(struct GBA* gba) {
758 UNUSED(gba);
759
760 struct GBAThread* thread = GBAThreadGetContext();
761 if (!thread) {
762 return;
763 }
764
765 if (thread->rewindBuffer) {
766 --thread->rewindBufferNext;
767 if (thread->rewindBufferNext <= 0) {
768 thread->rewindBufferNext = thread->rewindBufferInterval;
769 GBARecordFrame(thread);
770 }
771 }
772}
773
774void GBAFrameEnded(struct GBA* gba) {
775 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
776
777 if (gba->rr) {
778 gba->rr->nextFrame(gba->rr);
779 }
780
781 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
782 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
783 size_t i;
784 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
785 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
786 if (!cheats->hook) {
787 GBACheatRefresh(device, cheats);
788 }
789 }
790 }
791
792 if (gba->stream) {
793 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
794 }
795
796 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
797 GBAHardwarePlayerUpdate(gba);
798 }
799
800 struct GBAThread* thread = GBAThreadGetContext();
801 if (!thread) {
802 return;
803 }
804
805 if (thread->frameCallback) {
806 thread->frameCallback(thread);
807 }
808}
809
810void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
811 size_t immediate;
812 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
813 if (gba->cpu->components[immediate] == component) {
814 break;
815 }
816 }
817 if (immediate == gba->cpu->numComponents) {
818 return;
819 }
820 if (mode == MODE_ARM) {
821 int32_t value;
822 int32_t old;
823 value = 0xE1200070;
824 value |= immediate & 0xF;
825 value |= (immediate & 0xFFF0) << 4;
826 GBAPatch32(gba->cpu, address, value, &old);
827 *opcode = old;
828 } else {
829 int16_t value;
830 int16_t old;
831 value = 0xBE00;
832 value |= immediate & 0xFF;
833 GBAPatch16(gba->cpu, address, value, &old);
834 *opcode = (uint16_t) old;
835 }
836}
837
838void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
839 if (mode == MODE_ARM) {
840 GBAPatch32(gba->cpu, address, opcode, 0);
841 } else {
842 GBAPatch16(gba->cpu, address, opcode, 0);
843 }
844}
845
846static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
847 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
848 return true;
849}
850
851static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
852 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
853 return true;
854}