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/rr/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/math.h"
21#include "util/patch.h"
22#include "util/vfs.h"
23
24const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
25const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
26
27static const size_t GBA_ROM_MAGIC_OFFSET = 3;
28static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
29
30static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
31static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
32static void GBAProcessEvents(struct ARMCore* cpu);
33static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
34static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
35static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
36static void GBABreakpoint(struct ARMCore* cpu, int immediate);
37
38static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
39static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
40
41
42#ifdef _3DS
43extern uint32_t* romBuffer;
44extern size_t romBufferSize;
45#endif
46
47void GBACreate(struct GBA* gba) {
48 gba->d.id = GBA_COMPONENT_MAGIC;
49 gba->d.init = GBAInit;
50 gba->d.deinit = 0;
51}
52
53static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
54 struct GBA* gba = (struct GBA*) component;
55 gba->cpu = cpu;
56 gba->debugger = 0;
57 gba->sync = 0;
58
59 GBAInterruptHandlerInit(&cpu->irqh);
60 GBAMemoryInit(gba);
61 GBASavedataInit(&gba->memory.savedata, 0);
62
63 gba->video.p = gba;
64 GBAVideoInit(&gba->video);
65
66 gba->audio.p = gba;
67 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
68
69 GBAIOInit(gba);
70
71 gba->sio.p = gba;
72 GBASIOInit(&gba->sio);
73
74 gba->timersEnabled = 0;
75 memset(gba->timers, 0, sizeof(gba->timers));
76
77 gba->springIRQ = 0;
78 gba->keySource = 0;
79 gba->rotationSource = 0;
80 gba->luminanceSource = 0;
81 gba->rtcSource = 0;
82 gba->rumble = 0;
83 gba->rr = 0;
84
85 gba->romVf = 0;
86 gba->biosVf = 0;
87
88 gba->logHandler = 0;
89 gba->logLevel = GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
90 gba->stream = 0;
91 gba->keyCallback = 0;
92 gba->stopCallback = 0;
93
94 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
95
96 gba->idleOptimization = IDLE_LOOP_REMOVE;
97 gba->idleLoop = IDLE_LOOP_NONE;
98 gba->lastJump = 0;
99 gba->haltPending = false;
100 gba->idleDetectionStep = 0;
101 gba->idleDetectionFailures = 0;
102
103 gba->realisticTiming = true;
104 gba->hardCrash = true;
105
106 gba->performingDMA = false;
107}
108
109void GBAUnloadROM(struct GBA* gba) {
110 if (gba->memory.rom && gba->pristineRom != gba->memory.rom) {
111 if (gba->yankedRomSize) {
112 gba->yankedRomSize = 0;
113 }
114 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
115 }
116 gba->memory.rom = 0;
117
118 if (gba->romVf) {
119#ifndef _3DS
120 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
121#endif
122 gba->pristineRom = 0;
123 gba->romVf = 0;
124 }
125
126 GBASavedataDeinit(&gba->memory.savedata);
127}
128
129void GBADestroy(struct GBA* gba) {
130 GBAUnloadROM(gba);
131
132 if (gba->biosVf) {
133 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
134 }
135
136 GBAMemoryDeinit(gba);
137 GBAVideoDeinit(&gba->video);
138 GBAAudioDeinit(&gba->audio);
139 GBASIODeinit(&gba->sio);
140 gba->rr = 0;
141}
142
143void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
144 irqh->reset = GBAReset;
145 irqh->processEvents = GBAProcessEvents;
146 irqh->swi16 = GBASwi16;
147 irqh->swi32 = GBASwi32;
148 irqh->hitIllegal = GBAIllegal;
149 irqh->readCPSR = GBATestIRQ;
150 irqh->hitStub = GBAHitStub;
151 irqh->bkpt16 = GBABreakpoint;
152 irqh->bkpt32 = GBABreakpoint;
153}
154
155void GBAReset(struct ARMCore* cpu) {
156 ARMSetPrivilegeMode(cpu, MODE_IRQ);
157 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
158 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
159 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
160 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
161 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
162
163 struct GBA* gba = (struct GBA*) cpu->master;
164 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
165 GBASavedataUnmask(&gba->memory.savedata);
166 }
167
168 if (gba->yankedRomSize) {
169 gba->memory.romSize = gba->yankedRomSize;
170 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
171 gba->yankedRomSize = 0;
172 }
173 GBAMemoryReset(gba);
174 GBAVideoReset(&gba->video);
175 GBAAudioReset(&gba->audio);
176 GBAIOInit(gba);
177
178 GBASIOReset(&gba->sio);
179
180 gba->timersEnabled = 0;
181 memset(gba->timers, 0, sizeof(gba->timers));
182}
183
184void GBASkipBIOS(struct ARMCore* cpu) {
185 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
186 cpu->gprs[ARM_PC] = BASE_CART0;
187 int currentCycles = 0;
188 ARM_WRITE_PC;
189 }
190}
191
192static void GBAProcessEvents(struct ARMCore* cpu) {
193 do {
194 struct GBA* gba = (struct GBA*) cpu->master;
195 int32_t cycles = cpu->nextEvent;
196 int32_t nextEvent = INT_MAX;
197 int32_t testEvent;
198#ifndef NDEBUG
199 if (cycles < 0) {
200 GBALog(gba, GBA_LOG_FATAL, "Negative cycles passed: %i", cycles);
201 }
202#endif
203
204 gba->bus = cpu->prefetch[1];
205 if (cpu->executionMode == MODE_THUMB) {
206 gba->bus |= cpu->prefetch[1] << 16;
207 }
208
209 if (gba->springIRQ) {
210 ARMRaiseIRQ(cpu);
211 gba->springIRQ = 0;
212 }
213
214 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
215 if (testEvent < nextEvent) {
216 nextEvent = testEvent;
217 }
218
219 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
220 if (testEvent < nextEvent) {
221 nextEvent = testEvent;
222 }
223
224 testEvent = GBATimersProcessEvents(gba, cycles);
225 if (testEvent < nextEvent) {
226 nextEvent = testEvent;
227 }
228
229 testEvent = GBAMemoryRunDMAs(gba, cycles);
230 if (testEvent < nextEvent) {
231 nextEvent = testEvent;
232 }
233
234 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
235 if (testEvent < nextEvent) {
236 nextEvent = testEvent;
237 }
238
239 cpu->cycles -= cycles;
240 cpu->nextEvent = nextEvent;
241
242 if (cpu->halted) {
243 cpu->cycles = cpu->nextEvent;
244 }
245 } while (cpu->cycles >= cpu->nextEvent);
246}
247
248static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
249 int32_t nextEvent = INT_MAX;
250 if (gba->timersEnabled) {
251 struct GBATimer* timer;
252 struct GBATimer* nextTimer;
253
254 timer = &gba->timers[0];
255 if (GBATimerFlagsIsEnable(timer->flags)) {
256 timer->nextEvent -= cycles;
257 timer->lastEvent -= cycles;
258 while (timer->nextEvent <= 0) {
259 timer->lastEvent = timer->nextEvent;
260 timer->nextEvent += timer->overflowInterval;
261 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
262 timer->oldReload = timer->reload;
263
264 if (GBATimerFlagsIsDoIrq(timer->flags)) {
265 GBARaiseIRQ(gba, IRQ_TIMER0);
266 }
267
268 if (gba->audio.enable) {
269 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
270 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
271 }
272
273 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
274 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
275 }
276 }
277
278 nextTimer = &gba->timers[1];
279 if (GBATimerFlagsIsCountUp(nextTimer->flags)) {
280 ++gba->memory.io[REG_TM1CNT_LO >> 1];
281 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
282 nextTimer->nextEvent = 0;
283 }
284 }
285 }
286 nextEvent = timer->nextEvent;
287 }
288
289 timer = &gba->timers[1];
290 if (GBATimerFlagsIsEnable(timer->flags)) {
291 timer->nextEvent -= cycles;
292 timer->lastEvent -= cycles;
293 if (timer->nextEvent <= 0) {
294 timer->lastEvent = timer->nextEvent;
295 timer->nextEvent += timer->overflowInterval;
296 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
297 timer->oldReload = timer->reload;
298
299 if (GBATimerFlagsIsDoIrq(timer->flags)) {
300 GBARaiseIRQ(gba, IRQ_TIMER1);
301 }
302
303 if (gba->audio.enable) {
304 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
305 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
306 }
307
308 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
309 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
310 }
311 }
312
313 if (GBATimerFlagsIsCountUp(timer->flags)) {
314 timer->nextEvent = INT_MAX;
315 }
316
317 nextTimer = &gba->timers[2];
318 if (GBATimerFlagsIsCountUp(nextTimer->flags)) {
319 ++gba->memory.io[REG_TM2CNT_LO >> 1];
320 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
321 nextTimer->nextEvent = 0;
322 }
323 }
324 }
325 if (timer->nextEvent < nextEvent) {
326 nextEvent = timer->nextEvent;
327 }
328 }
329
330 timer = &gba->timers[2];
331 if (GBATimerFlagsIsEnable(timer->flags)) {
332 timer->nextEvent -= cycles;
333 timer->lastEvent -= cycles;
334 if (timer->nextEvent <= 0) {
335 timer->lastEvent = timer->nextEvent;
336 timer->nextEvent += timer->overflowInterval;
337 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
338 timer->oldReload = timer->reload;
339
340 if (GBATimerFlagsIsDoIrq(timer->flags)) {
341 GBARaiseIRQ(gba, IRQ_TIMER2);
342 }
343
344 if (GBATimerFlagsIsCountUp(timer->flags)) {
345 timer->nextEvent = INT_MAX;
346 }
347
348 nextTimer = &gba->timers[3];
349 if (GBATimerFlagsIsCountUp(nextTimer->flags)) {
350 ++gba->memory.io[REG_TM3CNT_LO >> 1];
351 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
352 nextTimer->nextEvent = 0;
353 }
354 }
355 }
356 if (timer->nextEvent < nextEvent) {
357 nextEvent = timer->nextEvent;
358 }
359 }
360
361 timer = &gba->timers[3];
362 if (GBATimerFlagsIsEnable(timer->flags)) {
363 timer->nextEvent -= cycles;
364 timer->lastEvent -= cycles;
365 if (timer->nextEvent <= 0) {
366 timer->lastEvent = timer->nextEvent;
367 timer->nextEvent += timer->overflowInterval;
368 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
369 timer->oldReload = timer->reload;
370
371 if (GBATimerFlagsIsDoIrq(timer->flags)) {
372 GBARaiseIRQ(gba, IRQ_TIMER3);
373 }
374
375 if (GBATimerFlagsIsCountUp(timer->flags)) {
376 timer->nextEvent = INT_MAX;
377 }
378 }
379 if (timer->nextEvent < nextEvent) {
380 nextEvent = timer->nextEvent;
381 }
382 }
383 }
384 return nextEvent;
385}
386
387void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
388 debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
389 debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
390 gba->debugger = debugger;
391 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
392 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
393}
394
395void GBADetachDebugger(struct GBA* gba) {
396 gba->debugger = 0;
397 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
398 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
399}
400
401bool GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
402 GBAUnloadROM(gba);
403 gba->romVf = vf;
404 gba->pristineRomSize = vf->size(vf);
405 vf->seek(vf, 0, SEEK_SET);
406 if (gba->pristineRomSize > SIZE_CART0) {
407 gba->pristineRomSize = SIZE_CART0;
408 }
409#ifdef _3DS
410 gba->pristineRom = 0;
411 if (gba->pristineRomSize <= romBufferSize) {
412 gba->pristineRom = romBuffer;
413 vf->read(vf, romBuffer, gba->pristineRomSize);
414 }
415#else
416 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
417#endif
418 if (!gba->pristineRom) {
419 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
420 return false;
421 }
422 gba->yankedRomSize = 0;
423 gba->memory.rom = gba->pristineRom;
424 gba->activeFile = fname;
425 gba->memory.romSize = gba->pristineRomSize;
426 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
427 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
428 GBASavedataInit(&gba->memory.savedata, sav);
429 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
430 return true;
431 // TODO: error check
432}
433
434void GBAYankROM(struct GBA* gba) {
435 gba->yankedRomSize = gba->memory.romSize;
436 gba->memory.romSize = 0;
437 gba->memory.romMask = 0;
438 GBARaiseIRQ(gba, IRQ_GAMEPAK);
439}
440
441void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
442 gba->biosVf = vf;
443 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
444 if (!bios) {
445 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
446 return;
447 }
448 gba->memory.bios = bios;
449 gba->memory.fullBios = 1;
450 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
451 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
452 if (checksum == GBA_BIOS_CHECKSUM) {
453 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
454 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
455 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
456 } else {
457 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
458 }
459 gba->biosChecksum = checksum;
460 if (gba->memory.activeRegion == REGION_BIOS) {
461 gba->cpu->memory.activeRegion = gba->memory.bios;
462 }
463 // TODO: error check
464}
465
466void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
467 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
468 if (!patchedSize || patchedSize > SIZE_CART0) {
469 return;
470 }
471 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
472 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
473 mappedMemoryFree(gba->memory.rom, patchedSize);
474 gba->memory.rom = gba->pristineRom;
475 return;
476 }
477 gba->memory.romSize = patchedSize;
478 gba->memory.romMask = SIZE_CART0 - 1;
479 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
480}
481
482void GBATimerUpdateRegister(struct GBA* gba, int timer) {
483 struct GBATimer* currentTimer = &gba->timers[timer];
484 if (GBATimerFlagsIsEnable(currentTimer->flags) && !GBATimerFlagsIsCountUp(currentTimer->flags)) {
485 int32_t prefetchSkew = 0;
486 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
487 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
488 }
489 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
490 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> GBATimerFlagsGetPrescaleBits(currentTimer->flags));
491 }
492}
493
494void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
495 gba->timers[timer].reload = reload;
496 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << GBATimerFlagsGetPrescaleBits(gba->timers[timer].flags);
497}
498
499void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
500 struct GBATimer* currentTimer = &gba->timers[timer];
501 GBATimerUpdateRegister(gba, timer);
502
503 unsigned oldPrescale = GBATimerFlagsGetPrescaleBits(currentTimer->flags);
504 switch (control & 0x0003) {
505 case 0x0000:
506 currentTimer->flags = GBATimerFlagsSetPrescaleBits(currentTimer->flags, 0);
507 break;
508 case 0x0001:
509 currentTimer->flags = GBATimerFlagsSetPrescaleBits(currentTimer->flags, 6);
510 break;
511 case 0x0002:
512 currentTimer->flags = GBATimerFlagsSetPrescaleBits(currentTimer->flags, 8);
513 break;
514 case 0x0003:
515 currentTimer->flags = GBATimerFlagsSetPrescaleBits(currentTimer->flags, 10);
516 break;
517 }
518 currentTimer->flags = GBATimerFlagsTestFillCountUp(currentTimer->flags, control & 0x0004);
519 currentTimer->flags = GBATimerFlagsTestFillDoIrq(currentTimer->flags, control & 0x0040);
520 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << GBATimerFlagsGetPrescaleBits(currentTimer->flags);
521 bool wasEnabled = GBATimerFlagsIsEnable(currentTimer->flags);
522 currentTimer->flags = GBATimerFlagsTestFillEnable(currentTimer->flags, control & 0x0080);
523 if (!wasEnabled && GBATimerFlagsIsEnable(currentTimer->flags)) {
524 if (!GBATimerFlagsIsCountUp(currentTimer->flags)) {
525 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
526 } else {
527 currentTimer->nextEvent = INT_MAX;
528 }
529 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
530 currentTimer->oldReload = currentTimer->reload;
531 currentTimer->lastEvent = gba->cpu->cycles;
532 gba->timersEnabled |= 1 << timer;
533 } else if (wasEnabled && !GBATimerFlagsIsEnable(currentTimer->flags)) {
534 if (!GBATimerFlagsIsCountUp(currentTimer->flags)) {
535 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
536 }
537 gba->timersEnabled &= ~(1 << timer);
538 } else if (GBATimerFlagsGetPrescaleBits(currentTimer->flags) != oldPrescale && !GBATimerFlagsIsCountUp(currentTimer->flags)) {
539 // FIXME: this might be before present
540 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
541 }
542
543 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
544 gba->cpu->nextEvent = currentTimer->nextEvent;
545 }
546};
547
548void GBAWriteIE(struct GBA* gba, uint16_t value) {
549 if (value & (1 << IRQ_KEYPAD)) {
550 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
551 }
552
553 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
554 ARMRaiseIRQ(gba->cpu);
555 }
556}
557
558void GBAWriteIME(struct GBA* gba, uint16_t value) {
559 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
560 ARMRaiseIRQ(gba->cpu);
561 }
562}
563
564void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
565 gba->memory.io[REG_IF >> 1] |= 1 << irq;
566 gba->cpu->halted = 0;
567
568 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
569 ARMRaiseIRQ(gba->cpu);
570 }
571}
572
573void GBATestIRQ(struct ARMCore* cpu) {
574 struct GBA* gba = (struct GBA*) cpu->master;
575 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
576 gba->springIRQ = 1;
577 gba->cpu->nextEvent = gba->cpu->cycles;
578 }
579}
580
581void GBAHalt(struct GBA* gba) {
582 gba->cpu->nextEvent = gba->cpu->cycles;
583 gba->cpu->halted = 1;
584}
585
586void GBAStop(struct GBA* gba) {
587 if (!gba->stopCallback) {
588 return;
589 }
590 gba->cpu->nextEvent = gba->cpu->cycles;
591 gba->stopCallback->stop(gba->stopCallback);
592}
593
594static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
595 struct GBAThread* threadContext = GBAThreadGetContext();
596 enum GBALogLevel logLevel = GBA_LOG_ALL;
597
598 if (gba) {
599 logLevel = gba->logLevel;
600 }
601
602 if (threadContext) {
603 logLevel = threadContext->logLevel;
604 gba = threadContext->gba;
605 }
606
607 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
608 return;
609 }
610
611 if (level == GBA_LOG_FATAL && gba) {
612 gba->cpu->nextEvent = 0;
613 }
614
615 if (threadContext) {
616 if (level == GBA_LOG_FATAL) {
617 MutexLock(&threadContext->stateMutex);
618 threadContext->state = THREAD_CRASHED;
619 MutexUnlock(&threadContext->stateMutex);
620 }
621 }
622 if (gba && gba->logHandler) {
623 gba->logHandler(threadContext, level, format, args);
624 return;
625 }
626
627 vprintf(format, args);
628 printf("\n");
629
630 if (level == GBA_LOG_FATAL && !threadContext) {
631 abort();
632 }
633}
634
635void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
636 va_list args;
637 va_start(args, format);
638 _GBAVLog(gba, level, format, args);
639 va_end(args);
640}
641
642void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
643 struct GBA* gba = 0;
644 if (debugger->cpu) {
645 gba = (struct GBA*) debugger->cpu->master;
646 }
647
648 enum GBALogLevel gbaLevel;
649 switch (level) {
650 default: // Avoids compiler warning
651 case DEBUGGER_LOG_DEBUG:
652 gbaLevel = GBA_LOG_DEBUG;
653 break;
654 case DEBUGGER_LOG_INFO:
655 gbaLevel = GBA_LOG_INFO;
656 break;
657 case DEBUGGER_LOG_WARN:
658 gbaLevel = GBA_LOG_WARN;
659 break;
660 case DEBUGGER_LOG_ERROR:
661 gbaLevel = GBA_LOG_ERROR;
662 break;
663 }
664 va_list args;
665 va_start(args, format);
666 _GBAVLog(gba, gbaLevel, format, args);
667 va_end(args);
668}
669
670bool GBAIsROM(struct VFile* vf) {
671 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
672 return false;
673 }
674 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
675 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
676 return false;
677 }
678 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
679}
680
681bool GBAIsBIOS(struct VFile* vf) {
682 if (vf->seek(vf, 0, SEEK_SET) < 0) {
683 return false;
684 }
685 uint8_t interruptTable[7 * 4];
686 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
687 return false;
688 }
689 int i;
690 for (i = 0; i < 7; ++i) {
691 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
692 return false;
693 }
694 }
695 return true;
696}
697
698void GBAGetGameCode(struct GBA* gba, char* out) {
699 if (!gba->memory.rom) {
700 out[0] = '\0';
701 return;
702 }
703 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
704}
705
706void GBAGetGameTitle(struct GBA* gba, char* out) {
707 if (!gba->memory.rom) {
708 strncpy(out, "(BIOS)", 12);
709 return;
710 }
711 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
712}
713
714void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
715 struct GBA* gba = (struct GBA*) cpu->master;
716 enum GBALogLevel level = GBA_LOG_ERROR;
717 if (gba->debugger) {
718 level = GBA_LOG_STUB;
719 struct DebuggerEntryInfo info = {
720 .address = _ARMPCAddress(cpu),
721 .opcode = opcode
722 };
723 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
724 }
725 GBALog(gba, level, "Stub opcode: %08x", opcode);
726}
727
728void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
729 struct GBA* gba = (struct GBA*) cpu->master;
730 if (!gba->yankedRomSize) {
731 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
732 }
733 if (gba->debugger) {
734 struct DebuggerEntryInfo info = {
735 .address = _ARMPCAddress(cpu),
736 .opcode = opcode
737 };
738 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
739 } else {
740 ARMRaiseUndefined(cpu);
741 }
742}
743
744void GBABreakpoint(struct ARMCore* cpu, int immediate) {
745 struct GBA* gba = (struct GBA*) cpu->master;
746 if (immediate >= GBA_COMPONENT_MAX) {
747 return;
748 }
749 switch (immediate) {
750 case GBA_COMPONENT_DEBUGGER:
751 if (gba->debugger) {
752 struct DebuggerEntryInfo info = {
753 .address = _ARMPCAddress(cpu)
754 };
755 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
756 }
757 break;
758 case GBA_COMPONENT_CHEAT_DEVICE:
759 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
760 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
761 struct GBACheatHook* hook = 0;
762 size_t i;
763 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
764 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
765 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
766 GBACheatRefresh(device, cheats);
767 hook = cheats->hook;
768 }
769 }
770 if (hook) {
771 ARMRunFake(cpu, hook->patchedOpcode);
772 }
773 }
774 break;
775 default:
776 break;
777 }
778}
779
780void GBAFrameStarted(struct GBA* gba) {
781 UNUSED(gba);
782
783 struct GBAThread* thread = GBAThreadGetContext();
784 if (!thread) {
785 return;
786 }
787
788 if (thread->rewindBuffer) {
789 --thread->rewindBufferNext;
790 if (thread->rewindBufferNext <= 0) {
791 thread->rewindBufferNext = thread->rewindBufferInterval;
792 GBARecordFrame(thread);
793 }
794 }
795}
796
797void GBAFrameEnded(struct GBA* gba) {
798 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
799
800 if (gba->rr) {
801 gba->rr->nextFrame(gba->rr);
802 }
803
804 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
805 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
806 size_t i;
807 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
808 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
809 if (!cheats->hook) {
810 GBACheatRefresh(device, cheats);
811 }
812 }
813 }
814
815 if (gba->stream && gba->stream->postVideoFrame) {
816 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
817 }
818
819 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
820 GBAHardwarePlayerUpdate(gba);
821 }
822
823 struct GBAThread* thread = GBAThreadGetContext();
824 if (!thread) {
825 return;
826 }
827
828 if (thread->frameCallback) {
829 thread->frameCallback(thread);
830 }
831}
832
833void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
834 size_t immediate;
835 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
836 if (gba->cpu->components[immediate] == component) {
837 break;
838 }
839 }
840 if (immediate == gba->cpu->numComponents) {
841 return;
842 }
843 if (mode == MODE_ARM) {
844 int32_t value;
845 int32_t old;
846 value = 0xE1200070;
847 value |= immediate & 0xF;
848 value |= (immediate & 0xFFF0) << 4;
849 GBAPatch32(gba->cpu, address, value, &old);
850 *opcode = old;
851 } else {
852 int16_t value;
853 int16_t old;
854 value = 0xBE00;
855 value |= immediate & 0xFF;
856 GBAPatch16(gba->cpu, address, value, &old);
857 *opcode = (uint16_t) old;
858 }
859}
860
861void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
862 if (mode == MODE_ARM) {
863 GBAPatch32(gba->cpu, address, opcode, 0);
864 } else {
865 GBAPatch16(gba->cpu, address, opcode, 0);
866 }
867}
868
869#if (!defined(USE_PTHREADS) && !defined(_WIN32)) || defined(DISABLE_THREADING)
870struct GBAThread* GBAThreadGetContext(void) {
871 return 0;
872}
873#endif
874
875static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
876 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
877 return true;
878}
879
880static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
881 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
882 return true;
883}