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
188 gba->bus = cpu->prefetch[1];
189 if (cpu->executionMode == MODE_THUMB) {
190 gba->bus |= cpu->prefetch[1] << 16;
191 }
192
193 if (gba->springIRQ) {
194 ARMRaiseIRQ(cpu);
195 gba->springIRQ = 0;
196 }
197
198 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
199 if (testEvent < nextEvent) {
200 nextEvent = testEvent;
201 }
202
203 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
204 if (testEvent < nextEvent) {
205 nextEvent = testEvent;
206 }
207
208 testEvent = GBATimersProcessEvents(gba, cycles);
209 if (testEvent < nextEvent) {
210 nextEvent = testEvent;
211 }
212
213 testEvent = GBAMemoryRunDMAs(gba, cycles);
214 if (testEvent < nextEvent) {
215 nextEvent = testEvent;
216 }
217
218 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
219 if (testEvent < nextEvent) {
220 nextEvent = testEvent;
221 }
222
223 cpu->cycles -= cycles;
224 cpu->nextEvent = nextEvent;
225
226 if (cpu->halted) {
227 cpu->cycles = cpu->nextEvent;
228 }
229 } while (cpu->cycles >= cpu->nextEvent);
230}
231
232static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
233 int32_t nextEvent = INT_MAX;
234 if (gba->timersEnabled) {
235 struct GBATimer* timer;
236 struct GBATimer* nextTimer;
237
238 timer = &gba->timers[0];
239 if (timer->enable) {
240 timer->nextEvent -= cycles;
241 timer->lastEvent -= cycles;
242 if (timer->nextEvent <= 0) {
243 timer->lastEvent = timer->nextEvent;
244 timer->nextEvent += timer->overflowInterval;
245 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
246 timer->oldReload = timer->reload;
247
248 if (timer->doIrq) {
249 GBARaiseIRQ(gba, IRQ_TIMER0);
250 }
251
252 if (gba->audio.enable) {
253 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
254 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
255 }
256
257 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
258 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
259 }
260 }
261
262 nextTimer = &gba->timers[1];
263 if (nextTimer->countUp) {
264 ++gba->memory.io[REG_TM1CNT_LO >> 1];
265 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
266 nextTimer->nextEvent = 0;
267 }
268 }
269 }
270 nextEvent = timer->nextEvent;
271 }
272
273 timer = &gba->timers[1];
274 if (timer->enable) {
275 timer->nextEvent -= cycles;
276 timer->lastEvent -= cycles;
277 if (timer->nextEvent <= 0) {
278 timer->lastEvent = timer->nextEvent;
279 timer->nextEvent += timer->overflowInterval;
280 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
281 timer->oldReload = timer->reload;
282
283 if (timer->doIrq) {
284 GBARaiseIRQ(gba, IRQ_TIMER1);
285 }
286
287 if (gba->audio.enable) {
288 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
289 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
290 }
291
292 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
293 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
294 }
295 }
296
297 if (timer->countUp) {
298 timer->nextEvent = INT_MAX;
299 }
300
301 nextTimer = &gba->timers[2];
302 if (nextTimer->countUp) {
303 ++gba->memory.io[REG_TM2CNT_LO >> 1];
304 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
305 nextTimer->nextEvent = 0;
306 }
307 }
308 }
309 if (timer->nextEvent < nextEvent) {
310 nextEvent = timer->nextEvent;
311 }
312 }
313
314 timer = &gba->timers[2];
315 if (timer->enable) {
316 timer->nextEvent -= cycles;
317 timer->lastEvent -= cycles;
318 if (timer->nextEvent <= 0) {
319 timer->lastEvent = timer->nextEvent;
320 timer->nextEvent += timer->overflowInterval;
321 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
322 timer->oldReload = timer->reload;
323
324 if (timer->doIrq) {
325 GBARaiseIRQ(gba, IRQ_TIMER2);
326 }
327
328 if (timer->countUp) {
329 timer->nextEvent = INT_MAX;
330 }
331
332 nextTimer = &gba->timers[3];
333 if (nextTimer->countUp) {
334 ++gba->memory.io[REG_TM3CNT_LO >> 1];
335 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
336 nextTimer->nextEvent = 0;
337 }
338 }
339 }
340 if (timer->nextEvent < nextEvent) {
341 nextEvent = timer->nextEvent;
342 }
343 }
344
345 timer = &gba->timers[3];
346 if (timer->enable) {
347 timer->nextEvent -= cycles;
348 timer->lastEvent -= cycles;
349 if (timer->nextEvent <= 0) {
350 timer->lastEvent = timer->nextEvent;
351 timer->nextEvent += timer->overflowInterval;
352 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
353 timer->oldReload = timer->reload;
354
355 if (timer->doIrq) {
356 GBARaiseIRQ(gba, IRQ_TIMER3);
357 }
358
359 if (timer->countUp) {
360 timer->nextEvent = INT_MAX;
361 }
362 }
363 if (timer->nextEvent < nextEvent) {
364 nextEvent = timer->nextEvent;
365 }
366 }
367 }
368 return nextEvent;
369}
370
371void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
372 debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
373 debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
374 gba->debugger = debugger;
375 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
376 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
377}
378
379void GBADetachDebugger(struct GBA* gba) {
380 gba->debugger = 0;
381 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
382 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
383}
384
385void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
386 GBAUnloadROM(gba);
387 gba->romVf = vf;
388 gba->pristineRomSize = vf->size(vf);
389 vf->seek(vf, 0, SEEK_SET);
390 if (gba->pristineRomSize > SIZE_CART0) {
391 gba->pristineRomSize = SIZE_CART0;
392 }
393 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
394 if (!gba->pristineRom) {
395 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
396 return;
397 }
398 gba->yankedRomSize = 0;
399 gba->memory.rom = gba->pristineRom;
400 gba->activeFile = fname;
401 gba->memory.romSize = gba->pristineRomSize;
402 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
403 GBASavedataInit(&gba->memory.savedata, sav);
404 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
405 // TODO: error check
406}
407
408void GBAYankROM(struct GBA* gba) {
409 gba->yankedRomSize = gba->memory.romSize;
410 gba->memory.romSize = 0;
411 GBARaiseIRQ(gba, IRQ_GAMEPAK);
412}
413
414void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
415 gba->biosVf = vf;
416 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
417 if (!bios) {
418 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
419 return;
420 }
421 gba->memory.bios = bios;
422 gba->memory.fullBios = 1;
423 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
424 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
425 if (checksum == GBA_BIOS_CHECKSUM) {
426 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
427 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
428 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
429 } else {
430 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
431 }
432 gba->biosChecksum = checksum;
433 if (gba->memory.activeRegion == REGION_BIOS) {
434 gba->cpu->memory.activeRegion = gba->memory.bios;
435 }
436 // TODO: error check
437}
438
439void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
440 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
441 if (!patchedSize || patchedSize > SIZE_CART0) {
442 return;
443 }
444 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
445 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
446 mappedMemoryFree(gba->memory.rom, patchedSize);
447 gba->memory.rom = gba->pristineRom;
448 return;
449 }
450 gba->memory.romSize = patchedSize;
451 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
452}
453
454void GBATimerUpdateRegister(struct GBA* gba, int timer) {
455 struct GBATimer* currentTimer = &gba->timers[timer];
456 if (currentTimer->enable && !currentTimer->countUp) {
457 int32_t prefetchSkew = 0;
458 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
459 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
460 }
461 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
462 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> currentTimer->prescaleBits);
463 }
464}
465
466void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
467 gba->timers[timer].reload = reload;
468 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
469}
470
471void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
472 struct GBATimer* currentTimer = &gba->timers[timer];
473 GBATimerUpdateRegister(gba, timer);
474
475 int oldPrescale = currentTimer->prescaleBits;
476 switch (control & 0x0003) {
477 case 0x0000:
478 currentTimer->prescaleBits = 0;
479 break;
480 case 0x0001:
481 currentTimer->prescaleBits = 6;
482 break;
483 case 0x0002:
484 currentTimer->prescaleBits = 8;
485 break;
486 case 0x0003:
487 currentTimer->prescaleBits = 10;
488 break;
489 }
490 currentTimer->countUp = !!(control & 0x0004);
491 currentTimer->doIrq = !!(control & 0x0040);
492 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
493 int wasEnabled = currentTimer->enable;
494 currentTimer->enable = !!(control & 0x0080);
495 if (!wasEnabled && currentTimer->enable) {
496 if (!currentTimer->countUp) {
497 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
498 } else {
499 currentTimer->nextEvent = INT_MAX;
500 }
501 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
502 currentTimer->oldReload = currentTimer->reload;
503 currentTimer->lastEvent = gba->cpu->cycles;
504 gba->timersEnabled |= 1 << timer;
505 } else if (wasEnabled && !currentTimer->enable) {
506 if (!currentTimer->countUp) {
507 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
508 }
509 gba->timersEnabled &= ~(1 << timer);
510 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
511 // FIXME: this might be before present
512 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
513 }
514
515 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
516 gba->cpu->nextEvent = currentTimer->nextEvent;
517 }
518};
519
520void GBAWriteIE(struct GBA* gba, uint16_t value) {
521 if (value & (1 << IRQ_KEYPAD)) {
522 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
523 }
524
525 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
526 ARMRaiseIRQ(gba->cpu);
527 }
528}
529
530void GBAWriteIME(struct GBA* gba, uint16_t value) {
531 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
532 ARMRaiseIRQ(gba->cpu);
533 }
534}
535
536void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
537 gba->memory.io[REG_IF >> 1] |= 1 << irq;
538 gba->cpu->halted = 0;
539
540 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
541 ARMRaiseIRQ(gba->cpu);
542 }
543}
544
545void GBATestIRQ(struct ARMCore* cpu) {
546 struct GBA* gba = (struct GBA*) cpu->master;
547 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
548 gba->springIRQ = 1;
549 gba->cpu->nextEvent = 0;
550 }
551}
552
553void GBAHalt(struct GBA* gba) {
554 gba->cpu->nextEvent = 0;
555 gba->cpu->halted = 1;
556}
557
558void GBAStop(struct GBA* gba) {
559 if (!gba->stopCallback) {
560 return;
561 }
562 gba->cpu->nextEvent = 0;
563 gba->stopCallback->stop(gba->stopCallback);
564}
565
566static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
567 struct GBAThread* threadContext = GBAThreadGetContext();
568 enum GBALogLevel logLevel = GBA_LOG_ALL;
569
570 if (gba) {
571 logLevel = gba->logLevel;
572 }
573
574 if (threadContext) {
575 logLevel = threadContext->logLevel;
576 gba = threadContext->gba;
577 }
578
579 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
580 return;
581 }
582
583 if (level == GBA_LOG_FATAL && gba) {
584 gba->cpu->nextEvent = 0;
585 }
586
587 if (threadContext) {
588 if (level == GBA_LOG_FATAL) {
589 MutexLock(&threadContext->stateMutex);
590 threadContext->state = THREAD_CRASHED;
591 MutexUnlock(&threadContext->stateMutex);
592 }
593 }
594 if (gba && gba->logHandler) {
595 gba->logHandler(threadContext, level, format, args);
596 return;
597 }
598
599 vprintf(format, args);
600 printf("\n");
601
602 if (level == GBA_LOG_FATAL && !threadContext) {
603 abort();
604 }
605}
606
607void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
608 va_list args;
609 va_start(args, format);
610 _GBAVLog(gba, level, format, args);
611 va_end(args);
612}
613
614void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
615 struct GBA* gba = 0;
616 if (debugger->cpu) {
617 gba = (struct GBA*) debugger->cpu->master;
618 }
619
620 enum GBALogLevel gbaLevel;
621 switch (level) {
622 default: // Avoids compiler warning
623 case DEBUGGER_LOG_DEBUG:
624 gbaLevel = GBA_LOG_DEBUG;
625 break;
626 case DEBUGGER_LOG_INFO:
627 gbaLevel = GBA_LOG_INFO;
628 break;
629 case DEBUGGER_LOG_WARN:
630 gbaLevel = GBA_LOG_WARN;
631 break;
632 case DEBUGGER_LOG_ERROR:
633 gbaLevel = GBA_LOG_ERROR;
634 break;
635 }
636 va_list args;
637 va_start(args, format);
638 _GBAVLog(gba, gbaLevel, format, args);
639 va_end(args);
640}
641
642bool GBAIsROM(struct VFile* vf) {
643 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
644 return false;
645 }
646 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
647 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
648 return false;
649 }
650 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
651}
652
653bool GBAIsBIOS(struct VFile* vf) {
654 if (vf->seek(vf, 0, SEEK_SET) < 0) {
655 return false;
656 }
657 uint32_t interruptTable[7];
658 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
659 return false;
660 }
661 int i;
662 for (i = 0; i < 7; ++i) {
663 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
664 return false;
665 }
666 }
667 return true;
668}
669
670void GBAGetGameCode(struct GBA* gba, char* out) {
671 if (!gba->memory.rom) {
672 out[0] = '\0';
673 return;
674 }
675 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
676}
677
678void GBAGetGameTitle(struct GBA* gba, char* out) {
679 if (!gba->memory.rom) {
680 strncpy(out, "(BIOS)", 12);
681 return;
682 }
683 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
684}
685
686void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
687 struct GBA* gba = (struct GBA*) cpu->master;
688 enum GBALogLevel level = GBA_LOG_ERROR;
689 if (gba->debugger) {
690 level = GBA_LOG_STUB;
691 struct DebuggerEntryInfo info = {
692 .address = _ARMPCAddress(cpu),
693 .opcode = opcode
694 };
695 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
696 }
697 GBALog(gba, level, "Stub opcode: %08x", opcode);
698}
699
700void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
701 struct GBA* gba = (struct GBA*) cpu->master;
702 if (!gba->yankedRomSize) {
703 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
704 }
705 if (gba->debugger) {
706 struct DebuggerEntryInfo info = {
707 .address = _ARMPCAddress(cpu),
708 .opcode = opcode
709 };
710 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
711 } else {
712 ARMRaiseUndefined(cpu);
713 }
714}
715
716void GBABreakpoint(struct ARMCore* cpu, int immediate) {
717 struct GBA* gba = (struct GBA*) cpu->master;
718 if (immediate >= GBA_COMPONENT_MAX) {
719 return;
720 }
721 switch (immediate) {
722 case GBA_COMPONENT_DEBUGGER:
723 if (gba->debugger) {
724 struct DebuggerEntryInfo info = {
725 .address = _ARMPCAddress(cpu)
726 };
727 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
728 }
729 break;
730 case GBA_COMPONENT_CHEAT_DEVICE:
731 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
732 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
733 struct GBACheatHook* hook = 0;
734 size_t i;
735 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
736 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
737 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
738 GBACheatRefresh(device, cheats);
739 hook = cheats->hook;
740 }
741 }
742 if (hook) {
743 ARMRunFake(cpu, hook->patchedOpcode);
744 }
745 }
746 break;
747 default:
748 break;
749 }
750}
751
752void GBAFrameStarted(struct GBA* gba) {
753 UNUSED(gba);
754
755 struct GBAThread* thread = GBAThreadGetContext();
756 if (!thread) {
757 return;
758 }
759
760 if (thread->rewindBuffer) {
761 --thread->rewindBufferNext;
762 if (thread->rewindBufferNext <= 0) {
763 thread->rewindBufferNext = thread->rewindBufferInterval;
764 GBARecordFrame(thread);
765 }
766 }
767}
768
769void GBAFrameEnded(struct GBA* gba) {
770 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
771
772 if (gba->rr) {
773 gba->rr->nextFrame(gba->rr);
774 }
775
776 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
777 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
778 size_t i;
779 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
780 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
781 if (!cheats->hook) {
782 GBACheatRefresh(device, cheats);
783 }
784 }
785 }
786
787 if (gba->stream) {
788 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
789 }
790
791 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
792 GBAHardwarePlayerUpdate(gba);
793 }
794
795 struct GBAThread* thread = GBAThreadGetContext();
796 if (!thread) {
797 return;
798 }
799
800 if (thread->frameCallback) {
801 thread->frameCallback(thread);
802 }
803}
804
805void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
806 size_t immediate;
807 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
808 if (gba->cpu->components[immediate] == component) {
809 break;
810 }
811 }
812 if (immediate == gba->cpu->numComponents) {
813 return;
814 }
815 if (mode == MODE_ARM) {
816 int32_t value;
817 int32_t old;
818 value = 0xE1200070;
819 value |= immediate & 0xF;
820 value |= (immediate & 0xFFF0) << 4;
821 GBAPatch32(gba->cpu, address, value, &old);
822 *opcode = old;
823 } else {
824 int16_t value;
825 int16_t old;
826 value = 0xBE00;
827 value |= immediate & 0xFF;
828 GBAPatch16(gba->cpu, address, value, &old);
829 *opcode = (uint16_t) old;
830 }
831}
832
833void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
834 if (mode == MODE_ARM) {
835 GBAPatch32(gba->cpu, address, opcode, 0);
836 } else {
837 GBAPatch16(gba->cpu, address, opcode, 0);
838 }
839}
840
841static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
842 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
843 return true;
844}
845
846static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
847 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
848 return true;
849}