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 GBASIOReset(&gba->sio);
167
168 gba->timersEnabled = 0;
169 memset(gba->timers, 0, sizeof(gba->timers));
170}
171
172void GBASkipBIOS(struct ARMCore* cpu) {
173 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
174 cpu->gprs[ARM_PC] = BASE_CART0;
175 int currentCycles = 0;
176 ARM_WRITE_PC;
177 }
178}
179
180static void GBAProcessEvents(struct ARMCore* cpu) {
181 do {
182 struct GBA* gba = (struct GBA*) cpu->master;
183 int32_t cycles = cpu->nextEvent;
184 int32_t nextEvent = INT_MAX;
185 int32_t testEvent;
186#ifndef NDEBUG
187 if (cycles < 0) {
188 GBALog(gba, GBA_LOG_FATAL, "Negative cycles passed: %i", cycles);
189 }
190#endif
191
192 gba->bus = cpu->prefetch[1];
193 if (cpu->executionMode == MODE_THUMB) {
194 gba->bus |= cpu->prefetch[1] << 16;
195 }
196
197 if (gba->springIRQ) {
198 ARMRaiseIRQ(cpu);
199 gba->springIRQ = 0;
200 }
201
202 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
203 if (testEvent < nextEvent) {
204 nextEvent = testEvent;
205 }
206
207 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
208 if (testEvent < nextEvent) {
209 nextEvent = testEvent;
210 }
211
212 testEvent = GBATimersProcessEvents(gba, cycles);
213 if (testEvent < nextEvent) {
214 nextEvent = testEvent;
215 }
216
217 testEvent = GBAMemoryRunDMAs(gba, cycles);
218 if (testEvent < nextEvent) {
219 nextEvent = testEvent;
220 }
221
222 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
223 if (testEvent < nextEvent) {
224 nextEvent = testEvent;
225 }
226
227 cpu->cycles -= cycles;
228 cpu->nextEvent = nextEvent;
229
230 if (cpu->halted) {
231 cpu->cycles = cpu->nextEvent;
232 }
233 } while (cpu->cycles >= cpu->nextEvent);
234}
235
236static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
237 int32_t nextEvent = INT_MAX;
238 if (gba->timersEnabled) {
239 struct GBATimer* timer;
240 struct GBATimer* nextTimer;
241
242 timer = &gba->timers[0];
243 if (timer->enable) {
244 timer->nextEvent -= cycles;
245 timer->lastEvent -= cycles;
246 while (timer->nextEvent <= 0) {
247 timer->lastEvent = timer->nextEvent;
248 timer->nextEvent += timer->overflowInterval;
249 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
250 timer->oldReload = timer->reload;
251
252 if (timer->doIrq) {
253 GBARaiseIRQ(gba, IRQ_TIMER0);
254 }
255
256 if (gba->audio.enable) {
257 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
258 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
259 }
260
261 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
262 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
263 }
264 }
265
266 nextTimer = &gba->timers[1];
267 if (nextTimer->countUp) {
268 ++gba->memory.io[REG_TM1CNT_LO >> 1];
269 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
270 nextTimer->nextEvent = 0;
271 }
272 }
273 }
274 nextEvent = timer->nextEvent;
275 }
276
277 timer = &gba->timers[1];
278 if (timer->enable) {
279 timer->nextEvent -= cycles;
280 timer->lastEvent -= cycles;
281 if (timer->nextEvent <= 0) {
282 timer->lastEvent = timer->nextEvent;
283 timer->nextEvent += timer->overflowInterval;
284 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
285 timer->oldReload = timer->reload;
286
287 if (timer->doIrq) {
288 GBARaiseIRQ(gba, IRQ_TIMER1);
289 }
290
291 if (gba->audio.enable) {
292 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
293 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
294 }
295
296 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
297 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
298 }
299 }
300
301 if (timer->countUp) {
302 timer->nextEvent = INT_MAX;
303 }
304
305 nextTimer = &gba->timers[2];
306 if (nextTimer->countUp) {
307 ++gba->memory.io[REG_TM2CNT_LO >> 1];
308 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
309 nextTimer->nextEvent = 0;
310 }
311 }
312 }
313 if (timer->nextEvent < nextEvent) {
314 nextEvent = timer->nextEvent;
315 }
316 }
317
318 timer = &gba->timers[2];
319 if (timer->enable) {
320 timer->nextEvent -= cycles;
321 timer->lastEvent -= cycles;
322 if (timer->nextEvent <= 0) {
323 timer->lastEvent = timer->nextEvent;
324 timer->nextEvent += timer->overflowInterval;
325 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
326 timer->oldReload = timer->reload;
327
328 if (timer->doIrq) {
329 GBARaiseIRQ(gba, IRQ_TIMER2);
330 }
331
332 if (timer->countUp) {
333 timer->nextEvent = INT_MAX;
334 }
335
336 nextTimer = &gba->timers[3];
337 if (nextTimer->countUp) {
338 ++gba->memory.io[REG_TM3CNT_LO >> 1];
339 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
340 nextTimer->nextEvent = 0;
341 }
342 }
343 }
344 if (timer->nextEvent < nextEvent) {
345 nextEvent = timer->nextEvent;
346 }
347 }
348
349 timer = &gba->timers[3];
350 if (timer->enable) {
351 timer->nextEvent -= cycles;
352 timer->lastEvent -= cycles;
353 if (timer->nextEvent <= 0) {
354 timer->lastEvent = timer->nextEvent;
355 timer->nextEvent += timer->overflowInterval;
356 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
357 timer->oldReload = timer->reload;
358
359 if (timer->doIrq) {
360 GBARaiseIRQ(gba, IRQ_TIMER3);
361 }
362
363 if (timer->countUp) {
364 timer->nextEvent = INT_MAX;
365 }
366 }
367 if (timer->nextEvent < nextEvent) {
368 nextEvent = timer->nextEvent;
369 }
370 }
371 }
372 return nextEvent;
373}
374
375void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
376 debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
377 debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
378 gba->debugger = debugger;
379 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
380 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
381}
382
383void GBADetachDebugger(struct GBA* gba) {
384 gba->debugger = 0;
385 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
386 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
387}
388
389void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
390 GBAUnloadROM(gba);
391 gba->romVf = vf;
392 gba->pristineRomSize = vf->size(vf);
393 vf->seek(vf, 0, SEEK_SET);
394 if (gba->pristineRomSize > SIZE_CART0) {
395 gba->pristineRomSize = SIZE_CART0;
396 }
397 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
398 if (!gba->pristineRom) {
399 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
400 return;
401 }
402 gba->yankedRomSize = 0;
403 gba->memory.rom = gba->pristineRom;
404 gba->activeFile = fname;
405 gba->memory.romSize = gba->pristineRomSize;
406 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
407 GBASavedataInit(&gba->memory.savedata, sav);
408 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
409 // TODO: error check
410}
411
412void GBAYankROM(struct GBA* gba) {
413 gba->yankedRomSize = gba->memory.romSize;
414 gba->memory.romSize = 0;
415 GBARaiseIRQ(gba, IRQ_GAMEPAK);
416}
417
418void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
419 gba->biosVf = vf;
420 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
421 if (!bios) {
422 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
423 return;
424 }
425 gba->memory.bios = bios;
426 gba->memory.fullBios = 1;
427 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
428 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
429 if (checksum == GBA_BIOS_CHECKSUM) {
430 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
431 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
432 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
433 } else {
434 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
435 }
436 gba->biosChecksum = checksum;
437 if (gba->memory.activeRegion == REGION_BIOS) {
438 gba->cpu->memory.activeRegion = gba->memory.bios;
439 }
440 // TODO: error check
441}
442
443void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
444 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
445 if (!patchedSize || patchedSize > SIZE_CART0) {
446 return;
447 }
448 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
449 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
450 mappedMemoryFree(gba->memory.rom, patchedSize);
451 gba->memory.rom = gba->pristineRom;
452 return;
453 }
454 gba->memory.romSize = patchedSize;
455 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
456}
457
458void GBATimerUpdateRegister(struct GBA* gba, int timer) {
459 struct GBATimer* currentTimer = &gba->timers[timer];
460 if (currentTimer->enable && !currentTimer->countUp) {
461 int32_t prefetchSkew = 0;
462 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
463 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
464 }
465 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
466 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> currentTimer->prescaleBits);
467 }
468}
469
470void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
471 gba->timers[timer].reload = reload;
472 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
473}
474
475void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
476 struct GBATimer* currentTimer = &gba->timers[timer];
477 GBATimerUpdateRegister(gba, timer);
478
479 int oldPrescale = currentTimer->prescaleBits;
480 switch (control & 0x0003) {
481 case 0x0000:
482 currentTimer->prescaleBits = 0;
483 break;
484 case 0x0001:
485 currentTimer->prescaleBits = 6;
486 break;
487 case 0x0002:
488 currentTimer->prescaleBits = 8;
489 break;
490 case 0x0003:
491 currentTimer->prescaleBits = 10;
492 break;
493 }
494 currentTimer->countUp = !!(control & 0x0004);
495 currentTimer->doIrq = !!(control & 0x0040);
496 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
497 int wasEnabled = currentTimer->enable;
498 currentTimer->enable = !!(control & 0x0080);
499 if (!wasEnabled && currentTimer->enable) {
500 if (!currentTimer->countUp) {
501 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
502 } else {
503 currentTimer->nextEvent = INT_MAX;
504 }
505 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
506 currentTimer->oldReload = currentTimer->reload;
507 currentTimer->lastEvent = gba->cpu->cycles;
508 gba->timersEnabled |= 1 << timer;
509 } else if (wasEnabled && !currentTimer->enable) {
510 if (!currentTimer->countUp) {
511 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
512 }
513 gba->timersEnabled &= ~(1 << timer);
514 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
515 // FIXME: this might be before present
516 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
517 }
518
519 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
520 gba->cpu->nextEvent = currentTimer->nextEvent;
521 }
522};
523
524void GBAWriteIE(struct GBA* gba, uint16_t value) {
525 if (value & (1 << IRQ_KEYPAD)) {
526 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
527 }
528
529 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
530 ARMRaiseIRQ(gba->cpu);
531 }
532}
533
534void GBAWriteIME(struct GBA* gba, uint16_t value) {
535 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
536 ARMRaiseIRQ(gba->cpu);
537 }
538}
539
540void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
541 gba->memory.io[REG_IF >> 1] |= 1 << irq;
542 gba->cpu->halted = 0;
543
544 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
545 ARMRaiseIRQ(gba->cpu);
546 }
547}
548
549void GBATestIRQ(struct ARMCore* cpu) {
550 struct GBA* gba = (struct GBA*) cpu->master;
551 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
552 gba->springIRQ = 1;
553 gba->cpu->nextEvent = 0;
554 }
555}
556
557void GBAHalt(struct GBA* gba) {
558 gba->cpu->nextEvent = 0;
559 gba->cpu->halted = 1;
560}
561
562void GBAStop(struct GBA* gba) {
563 if (!gba->stopCallback) {
564 return;
565 }
566 gba->cpu->nextEvent = 0;
567 gba->stopCallback->stop(gba->stopCallback);
568}
569
570static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
571 struct GBAThread* threadContext = GBAThreadGetContext();
572 enum GBALogLevel logLevel = GBA_LOG_ALL;
573
574 if (gba) {
575 logLevel = gba->logLevel;
576 }
577
578 if (threadContext) {
579 logLevel = threadContext->logLevel;
580 gba = threadContext->gba;
581 }
582
583 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
584 return;
585 }
586
587 if (level == GBA_LOG_FATAL && gba) {
588 gba->cpu->nextEvent = 0;
589 }
590
591 if (threadContext) {
592 if (level == GBA_LOG_FATAL) {
593 MutexLock(&threadContext->stateMutex);
594 threadContext->state = THREAD_CRASHED;
595 MutexUnlock(&threadContext->stateMutex);
596 }
597 }
598 if (gba && gba->logHandler) {
599 gba->logHandler(threadContext, level, format, args);
600 return;
601 }
602
603 vprintf(format, args);
604 printf("\n");
605
606 if (level == GBA_LOG_FATAL && !threadContext) {
607 abort();
608 }
609}
610
611void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
612 va_list args;
613 va_start(args, format);
614 _GBAVLog(gba, level, format, args);
615 va_end(args);
616}
617
618void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
619 struct GBA* gba = 0;
620 if (debugger->cpu) {
621 gba = (struct GBA*) debugger->cpu->master;
622 }
623
624 enum GBALogLevel gbaLevel;
625 switch (level) {
626 default: // Avoids compiler warning
627 case DEBUGGER_LOG_DEBUG:
628 gbaLevel = GBA_LOG_DEBUG;
629 break;
630 case DEBUGGER_LOG_INFO:
631 gbaLevel = GBA_LOG_INFO;
632 break;
633 case DEBUGGER_LOG_WARN:
634 gbaLevel = GBA_LOG_WARN;
635 break;
636 case DEBUGGER_LOG_ERROR:
637 gbaLevel = GBA_LOG_ERROR;
638 break;
639 }
640 va_list args;
641 va_start(args, format);
642 _GBAVLog(gba, gbaLevel, format, args);
643 va_end(args);
644}
645
646bool GBAIsROM(struct VFile* vf) {
647 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
648 return false;
649 }
650 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
651 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
652 return false;
653 }
654 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
655}
656
657bool GBAIsBIOS(struct VFile* vf) {
658 if (vf->seek(vf, 0, SEEK_SET) < 0) {
659 return false;
660 }
661 uint32_t interruptTable[7];
662 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
663 return false;
664 }
665 int i;
666 for (i = 0; i < 7; ++i) {
667 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
668 return false;
669 }
670 }
671 return true;
672}
673
674void GBAGetGameCode(struct GBA* gba, char* out) {
675 if (!gba->memory.rom) {
676 out[0] = '\0';
677 return;
678 }
679 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
680}
681
682void GBAGetGameTitle(struct GBA* gba, char* out) {
683 if (!gba->memory.rom) {
684 strncpy(out, "(BIOS)", 12);
685 return;
686 }
687 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
688}
689
690void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
691 struct GBA* gba = (struct GBA*) cpu->master;
692 enum GBALogLevel level = GBA_LOG_ERROR;
693 if (gba->debugger) {
694 level = GBA_LOG_STUB;
695 struct DebuggerEntryInfo info = {
696 .address = _ARMPCAddress(cpu),
697 .opcode = opcode
698 };
699 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
700 }
701 GBALog(gba, level, "Stub opcode: %08x", opcode);
702}
703
704void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
705 struct GBA* gba = (struct GBA*) cpu->master;
706 if (!gba->yankedRomSize) {
707 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
708 }
709 if (gba->debugger) {
710 struct DebuggerEntryInfo info = {
711 .address = _ARMPCAddress(cpu),
712 .opcode = opcode
713 };
714 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
715 } else {
716 ARMRaiseUndefined(cpu);
717 }
718}
719
720void GBABreakpoint(struct ARMCore* cpu, int immediate) {
721 struct GBA* gba = (struct GBA*) cpu->master;
722 if (immediate >= GBA_COMPONENT_MAX) {
723 return;
724 }
725 switch (immediate) {
726 case GBA_COMPONENT_DEBUGGER:
727 if (gba->debugger) {
728 struct DebuggerEntryInfo info = {
729 .address = _ARMPCAddress(cpu)
730 };
731 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
732 }
733 break;
734 case GBA_COMPONENT_CHEAT_DEVICE:
735 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
736 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
737 struct GBACheatHook* hook = 0;
738 size_t i;
739 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
740 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
741 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
742 GBACheatRefresh(device, cheats);
743 hook = cheats->hook;
744 }
745 }
746 if (hook) {
747 ARMRunFake(cpu, hook->patchedOpcode);
748 }
749 }
750 break;
751 default:
752 break;
753 }
754}
755
756void GBAFrameStarted(struct GBA* gba) {
757 UNUSED(gba);
758
759 struct GBAThread* thread = GBAThreadGetContext();
760 if (!thread) {
761 return;
762 }
763
764 if (thread->rewindBuffer) {
765 --thread->rewindBufferNext;
766 if (thread->rewindBufferNext <= 0) {
767 thread->rewindBufferNext = thread->rewindBufferInterval;
768 GBARecordFrame(thread);
769 }
770 }
771}
772
773void GBAFrameEnded(struct GBA* gba) {
774 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
775
776 if (gba->rr) {
777 gba->rr->nextFrame(gba->rr);
778 }
779
780 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
781 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
782 size_t i;
783 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
784 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
785 if (!cheats->hook) {
786 GBACheatRefresh(device, cheats);
787 }
788 }
789 }
790
791 if (gba->stream) {
792 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
793 }
794
795 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
796 GBAHardwarePlayerUpdate(gba);
797 }
798
799 struct GBAThread* thread = GBAThreadGetContext();
800 if (!thread) {
801 return;
802 }
803
804 if (thread->frameCallback) {
805 thread->frameCallback(thread);
806 }
807}
808
809void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
810 size_t immediate;
811 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
812 if (gba->cpu->components[immediate] == component) {
813 break;
814 }
815 }
816 if (immediate == gba->cpu->numComponents) {
817 return;
818 }
819 if (mode == MODE_ARM) {
820 int32_t value;
821 int32_t old;
822 value = 0xE1200070;
823 value |= immediate & 0xF;
824 value |= (immediate & 0xFFF0) << 4;
825 GBAPatch32(gba->cpu, address, value, &old);
826 *opcode = old;
827 } else {
828 int16_t value;
829 int16_t old;
830 value = 0xBE00;
831 value |= immediate & 0xFF;
832 GBAPatch16(gba->cpu, address, value, &old);
833 *opcode = (uint16_t) old;
834 }
835}
836
837void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
838 if (mode == MODE_ARM) {
839 GBAPatch32(gba->cpu, address, opcode, 0);
840 } else {
841 GBAPatch16(gba->cpu, address, opcode, 0);
842 }
843}
844
845static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
846 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
847 return true;
848}
849
850static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
851 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
852 return true;
853}