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 <mgba/internal/gba/gba.h>
7
8#include <mgba/internal/arm/isa-inlines.h>
9#include <mgba/internal/arm/debugger/debugger.h>
10#include <mgba/internal/arm/decoder.h>
11
12#include <mgba/internal/gba/bios.h>
13#include <mgba/internal/gba/cheats.h>
14#include <mgba/internal/gba/io.h>
15#include <mgba/internal/gba/overrides.h>
16#include <mgba/internal/gba/rr/rr.h>
17
18#include <mgba-util/patch.h>
19#include <mgba-util/crc32.h>
20#include <mgba-util/math.h>
21#include <mgba-util/memory.h>
22#include <mgba-util/vfs.h>
23
24mLOG_DEFINE_CATEGORY(GBA, "GBA");
25mLOG_DEFINE_CATEGORY(GBA_DEBUG, "GBA Debug");
26
27const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
28
29static const size_t GBA_ROM_MAGIC_OFFSET = 3;
30static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
31
32static const size_t GBA_MB_MAGIC_OFFSET = 0xC0;
33
34static void GBAInit(void* cpu, struct mCPUComponent* component);
35static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
36static void GBAProcessEvents(struct ARMCore* cpu);
37static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
38static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
39static void GBABreakpoint(struct ARMCore* cpu, int immediate);
40
41static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
42static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
43
44
45#ifdef _3DS
46extern uint32_t* romBuffer;
47extern size_t romBufferSize;
48#endif
49
50void GBACreate(struct GBA* gba) {
51 gba->d.id = GBA_COMPONENT_MAGIC;
52 gba->d.init = GBAInit;
53 gba->d.deinit = 0;
54}
55
56static void GBAInit(void* cpu, struct mCPUComponent* component) {
57 struct GBA* gba = (struct GBA*) component;
58 gba->cpu = cpu;
59 gba->debugger = 0;
60 gba->sync = 0;
61
62 GBAInterruptHandlerInit(&gba->cpu->irqh);
63 GBAMemoryInit(gba);
64
65 gba->memory.savedata.timing = &gba->timing;
66 GBASavedataInit(&gba->memory.savedata, NULL);
67
68 gba->video.p = gba;
69 GBAVideoInit(&gba->video);
70
71 gba->audio.p = gba;
72 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
73
74 GBAIOInit(gba);
75
76 gba->sio.p = gba;
77 GBASIOInit(&gba->sio);
78
79 gba->springIRQ = 0;
80 gba->keySource = 0;
81 gba->rotationSource = 0;
82 gba->luminanceSource = 0;
83 gba->rtcSource = 0;
84 gba->rumble = 0;
85 gba->rr = 0;
86
87 gba->romVf = 0;
88 gba->biosVf = 0;
89
90 gba->stream = NULL;
91 gba->keyCallback = NULL;
92 gba->stopCallback = NULL;
93 gba->stopCallback = NULL;
94 gba->coreCallbacks = NULL;
95
96 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
97
98 gba->idleOptimization = IDLE_LOOP_REMOVE;
99 gba->idleLoop = IDLE_LOOP_NONE;
100
101 gba->realisticTiming = true;
102 gba->hardCrash = true;
103 gba->allowOpposingDirections = true;
104
105 gba->performingDMA = false;
106
107 gba->pristineRom = 0;
108 gba->pristineRomSize = 0;
109 gba->yankedRomSize = 0;
110
111 mTimingInit(&gba->timing, &gba->cpu->cycles, &gba->cpu->nextEvent);
112}
113
114void GBAUnloadROM(struct GBA* gba) {
115 if (gba->memory.rom && gba->pristineRom != gba->memory.rom) {
116 if (gba->yankedRomSize) {
117 gba->yankedRomSize = 0;
118 }
119 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
120 }
121 gba->memory.rom = 0;
122
123 if (gba->romVf) {
124#ifndef _3DS
125 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
126#endif
127 gba->romVf->close(gba->romVf);
128 gba->romVf = 0;
129 }
130 gba->pristineRom = 0;
131
132 GBASavedataDeinit(&gba->memory.savedata);
133 if (gba->memory.savedata.realVf) {
134 gba->memory.savedata.realVf->close(gba->memory.savedata.realVf);
135 gba->memory.savedata.realVf = 0;
136 }
137 gba->idleLoop = IDLE_LOOP_NONE;
138}
139
140void GBADestroy(struct GBA* gba) {
141 GBAUnloadROM(gba);
142
143 if (gba->biosVf) {
144 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
145 gba->biosVf->close(gba->biosVf);
146 gba->biosVf = 0;
147 }
148
149 GBAMemoryDeinit(gba);
150 GBAVideoDeinit(&gba->video);
151 GBAAudioDeinit(&gba->audio);
152 GBASIODeinit(&gba->sio);
153 gba->rr = 0;
154 mTimingDeinit(&gba->timing);
155}
156
157void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
158 irqh->reset = GBAReset;
159 irqh->processEvents = GBAProcessEvents;
160 irqh->swi16 = GBASwi16;
161 irqh->swi32 = GBASwi32;
162 irqh->hitIllegal = GBAIllegal;
163 irqh->readCPSR = GBATestIRQ;
164 irqh->hitStub = GBAHitStub;
165 irqh->bkpt16 = GBABreakpoint;
166 irqh->bkpt32 = GBABreakpoint;
167}
168
169void GBAReset(struct ARMCore* cpu) {
170 ARMSetPrivilegeMode(cpu, MODE_IRQ);
171 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
172 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
173 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
174 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
175 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
176
177 struct GBA* gba = (struct GBA*) cpu->master;
178 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
179 GBASavedataUnmask(&gba->memory.savedata);
180 }
181
182 gba->cpuBlocked = false;
183 gba->earlyExit = false;
184 if (gba->yankedRomSize) {
185 gba->memory.romSize = gba->yankedRomSize;
186 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
187 gba->yankedRomSize = 0;
188 }
189 mTimingClear(&gba->timing);
190 GBAMemoryReset(gba);
191 GBAVideoReset(&gba->video);
192 GBAAudioReset(&gba->audio);
193 GBAIOInit(gba);
194 GBATimerInit(gba);
195
196 GBASIOReset(&gba->sio);
197
198 gba->lastJump = 0;
199 gba->haltPending = false;
200 gba->idleDetectionStep = 0;
201 gba->idleDetectionFailures = 0;
202
203 gba->debug = false;
204 memset(gba->debugString, 0, sizeof(gba->debugString));
205}
206
207void GBASkipBIOS(struct GBA* gba) {
208 struct ARMCore* cpu = gba->cpu;
209 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
210 if (gba->memory.rom) {
211 cpu->gprs[ARM_PC] = BASE_CART0;
212 } else {
213 cpu->gprs[ARM_PC] = BASE_WORKING_RAM;
214 }
215 gba->memory.io[REG_VCOUNT >> 1] = 0x7E;
216 gba->memory.io[REG_POSTFLG >> 1] = 1;
217 int currentCycles = 0;
218 ARM_WRITE_PC;
219 }
220}
221
222static void GBAProcessEvents(struct ARMCore* cpu) {
223 struct GBA* gba = (struct GBA*) cpu->master;
224
225 gba->bus = cpu->prefetch[1];
226 if (cpu->executionMode == MODE_THUMB) {
227 gba->bus |= cpu->prefetch[1] << 16;
228 }
229
230 if (gba->springIRQ && !cpu->cpsr.i) {
231 ARMRaiseIRQ(cpu);
232 gba->springIRQ = 0;
233 }
234
235 int32_t nextEvent = cpu->nextEvent;
236 while (cpu->cycles >= nextEvent) {
237 int32_t cycles = cpu->cycles;
238
239 cpu->cycles = 0;
240 cpu->nextEvent = INT_MAX;
241
242#ifndef NDEBUG
243 if (cycles < 0) {
244 mLOG(GBA, FATAL, "Negative cycles passed: %i", cycles);
245 }
246#endif
247 nextEvent = cycles;
248 do {
249 nextEvent = mTimingTick(&gba->timing, nextEvent);
250 } while (gba->cpuBlocked);
251
252 cpu->nextEvent = nextEvent;
253
254 if (gba->earlyExit) {
255 gba->earlyExit = false;
256 break;
257 }
258 if (cpu->halted) {
259 cpu->cycles = nextEvent;
260 if (!gba->memory.io[REG_IME >> 1] || !gba->memory.io[REG_IE >> 1]) {
261 break;
262 }
263 }
264#ifndef NDEBUG
265 else if (nextEvent < 0) {
266 mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
267 }
268#endif
269 }
270}
271
272void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {
273 gba->debugger = (struct ARMDebugger*) debugger->platform;
274 gba->debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
275 gba->debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
276 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = &debugger->d;
277 ARMHotplugAttach(gba->cpu, CPU_COMPONENT_DEBUGGER);
278}
279
280void GBADetachDebugger(struct GBA* gba) {
281 gba->debugger = 0;
282 ARMHotplugDetach(gba->cpu, CPU_COMPONENT_DEBUGGER);
283 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = 0;
284}
285
286bool GBALoadMB(struct GBA* gba, struct VFile* vf) {
287 GBAUnloadROM(gba);
288 gba->romVf = vf;
289 gba->pristineRomSize = vf->size(vf);
290 vf->seek(vf, 0, SEEK_SET);
291 if (gba->pristineRomSize > SIZE_WORKING_RAM) {
292 gba->pristineRomSize = SIZE_WORKING_RAM;
293 }
294#ifdef _3DS
295 gba->pristineRom = 0;
296 if (gba->pristineRomSize <= romBufferSize) {
297 gba->pristineRom = romBuffer;
298 vf->read(vf, romBuffer, gba->pristineRomSize);
299 }
300#else
301 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
302#endif
303 if (!gba->pristineRom) {
304 mLOG(GBA, WARN, "Couldn't map ROM");
305 return false;
306 }
307 gba->yankedRomSize = 0;
308 gba->memory.romSize = 0;
309 gba->memory.romMask = 0;
310 gba->romCrc32 = doCrc32(gba->pristineRom, gba->pristineRomSize);
311 return true;
312}
313
314bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
315 if (!vf) {
316 return false;
317 }
318 GBAUnloadROM(gba);
319 gba->romVf = vf;
320 gba->pristineRomSize = vf->size(vf);
321 vf->seek(vf, 0, SEEK_SET);
322 if (gba->pristineRomSize > SIZE_CART0) {
323 gba->pristineRomSize = SIZE_CART0;
324 }
325#ifdef _3DS
326 gba->pristineRom = 0;
327 if (gba->pristineRomSize <= romBufferSize) {
328 gba->pristineRom = romBuffer;
329 vf->read(vf, romBuffer, gba->pristineRomSize);
330 }
331#else
332 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
333#endif
334 if (!gba->pristineRom) {
335 mLOG(GBA, WARN, "Couldn't map ROM");
336 return false;
337 }
338 gba->yankedRomSize = 0;
339 gba->memory.rom = gba->pristineRom;
340 gba->memory.romSize = gba->pristineRomSize;
341 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
342 gba->memory.mirroring = false;
343 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
344 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
345 GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
346 // TODO: error check
347 return true;
348}
349
350bool GBALoadSave(struct GBA* gba, struct VFile* sav) {
351 GBASavedataInit(&gba->memory.savedata, sav);
352 return true;
353}
354
355void GBAYankROM(struct GBA* gba) {
356 gba->yankedRomSize = gba->memory.romSize;
357 gba->memory.romSize = 0;
358 gba->memory.romMask = 0;
359 GBARaiseIRQ(gba, IRQ_GAMEPAK);
360}
361
362void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
363 gba->biosVf = vf;
364 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
365 if (!bios) {
366 mLOG(GBA, WARN, "Couldn't map BIOS");
367 return;
368 }
369 gba->memory.bios = bios;
370 gba->memory.fullBios = 1;
371 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
372 mLOG(GBA, DEBUG, "BIOS Checksum: 0x%X", checksum);
373 if (checksum == GBA_BIOS_CHECKSUM) {
374 mLOG(GBA, INFO, "Official GBA BIOS detected");
375 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
376 mLOG(GBA, INFO, "Official GBA (DS) BIOS detected");
377 } else {
378 mLOG(GBA, WARN, "BIOS checksum incorrect");
379 }
380 gba->biosChecksum = checksum;
381 if (gba->memory.activeRegion == REGION_BIOS) {
382 gba->cpu->memory.activeRegion = gba->memory.bios;
383 }
384 // TODO: error check
385}
386
387void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
388 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
389 if (!patchedSize || patchedSize > SIZE_CART0) {
390 return;
391 }
392 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
393 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
394 mappedMemoryFree(gba->memory.rom, patchedSize);
395 gba->memory.rom = gba->pristineRom;
396 return;
397 }
398 gba->memory.romSize = patchedSize;
399 gba->memory.romMask = SIZE_CART0 - 1;
400 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
401}
402
403void GBAWriteIE(struct GBA* gba, uint16_t value) {
404 if (value & (1 << IRQ_KEYPAD)) {
405 mLOG(GBA, STUB, "Keypad interrupts not implemented");
406 }
407
408 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
409 ARMRaiseIRQ(gba->cpu);
410 }
411}
412
413void GBAWriteIME(struct GBA* gba, uint16_t value) {
414 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
415 ARMRaiseIRQ(gba->cpu);
416 }
417}
418
419void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
420 gba->memory.io[REG_IF >> 1] |= 1 << irq;
421
422 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
423 gba->cpu->halted = 0;
424 if (gba->memory.io[REG_IME >> 1]) {
425 ARMRaiseIRQ(gba->cpu);
426 }
427 }
428}
429
430void GBATestIRQ(struct ARMCore* cpu) {
431 struct GBA* gba = (struct GBA*) cpu->master;
432 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
433 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
434 gba->cpu->nextEvent = gba->cpu->cycles;
435 }
436}
437
438void GBAHalt(struct GBA* gba) {
439 ARMHalt(gba->cpu);
440}
441
442void GBAStop(struct GBA* gba) {
443 if (!gba->stopCallback) {
444 return;
445 }
446 gba->cpu->nextEvent = gba->cpu->cycles;
447 gba->stopCallback->stop(gba->stopCallback);
448}
449
450void GBADebug(struct GBA* gba, uint16_t flags) {
451 gba->debugFlags = flags;
452 if (GBADebugFlagsIsSend(gba->debugFlags)) {
453 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
454 level &= 0x1F;
455 char oolBuf[0x101];
456 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
457 oolBuf[0x100] = '\0';
458 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
459 }
460 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
461}
462
463bool GBAIsROM(struct VFile* vf) {
464 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
465 return false;
466 }
467 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
468 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
469 return false;
470 }
471 if (GBAIsBIOS(vf)) {
472 return false;
473 }
474 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
475}
476
477bool GBAIsMB(struct VFile* vf) {
478 if (!GBAIsROM(vf)) {
479 return false;
480 }
481 if (vf->size(vf) > SIZE_WORKING_RAM) {
482 return false;
483 }
484 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
485 return false;
486 }
487 uint32_t signature;
488 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
489 return false;
490 }
491 uint32_t opcode;
492 LOAD_32(opcode, 0, &signature);
493 struct ARMInstructionInfo info;
494 ARMDecodeARM(opcode, &info);
495 if (info.branchType != ARM_BRANCH) {
496 return false;
497 }
498 if (info.op1.immediate <= 0) {
499 return false;
500 } else if (info.op1.immediate == 28) {
501 // Ancient toolchain that is known to throw MB detection for a loop
502 return false;
503 } else if (info.op1.immediate != 24) {
504 return true;
505 }
506 // Found a libgba-linked cart...these are a bit harder to detect.
507 return false;
508}
509
510bool GBAIsBIOS(struct VFile* vf) {
511 if (vf->seek(vf, 0, SEEK_SET) < 0) {
512 return false;
513 }
514 uint8_t interruptTable[7 * 4];
515 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
516 return false;
517 }
518 int i;
519 for (i = 0; i < 7; ++i) {
520 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
521 return false;
522 }
523 }
524 return true;
525}
526
527void GBAGetGameCode(const struct GBA* gba, char* out) {
528 memset(out, 0, 8);
529 if (!gba->memory.rom) {
530 return;
531 }
532
533 memcpy(out, "AGB-", 4);
534 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
535}
536
537void GBAGetGameTitle(const struct GBA* gba, char* out) {
538 if (gba->memory.rom) {
539 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
540 return;
541 }
542 if (gba->pristineRom) {
543 memcpy(out, &((struct GBACartridge*) gba->pristineRom)->title, 12);
544 return;
545 }
546 strncpy(out, "(BIOS)", 12);
547}
548
549void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
550 struct GBA* gba = (struct GBA*) cpu->master;
551#ifdef USE_DEBUGGERS
552 if (gba->debugger) {
553 struct mDebuggerEntryInfo info = {
554 .address = _ARMPCAddress(cpu),
555 .opcode = opcode
556 };
557 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
558 }
559#endif
560 // TODO: More sensible category?
561 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
562}
563
564void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
565 struct GBA* gba = (struct GBA*) cpu->master;
566 if (!gba->yankedRomSize) {
567 // TODO: More sensible category?
568 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
569 }
570#ifdef USE_DEBUGGERS
571 if (gba->debugger) {
572 struct mDebuggerEntryInfo info = {
573 .address = _ARMPCAddress(cpu),
574 .opcode = opcode
575 };
576 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
577 } else
578#endif
579 {
580 ARMRaiseUndefined(cpu);
581 }
582}
583
584void GBABreakpoint(struct ARMCore* cpu, int immediate) {
585 struct GBA* gba = (struct GBA*) cpu->master;
586 if (immediate >= CPU_COMPONENT_MAX) {
587 return;
588 }
589 switch (immediate) {
590#ifdef USE_DEBUGGERS
591 case CPU_COMPONENT_DEBUGGER:
592 if (gba->debugger) {
593 struct mDebuggerEntryInfo info = {
594 .address = _ARMPCAddress(cpu),
595 .breakType = BREAKPOINT_SOFTWARE
596 };
597 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
598 }
599 break;
600#endif
601 case CPU_COMPONENT_CHEAT_DEVICE:
602 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
603 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
604 struct GBACheatHook* hook = 0;
605 size_t i;
606 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
607 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
608 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
609 mCheatRefresh(device, &cheats->d);
610 hook = cheats->hook;
611 }
612 }
613 if (hook) {
614 ARMRunFake(cpu, hook->patchedOpcode);
615 }
616 }
617 break;
618 default:
619 break;
620 }
621}
622
623void GBAFrameStarted(struct GBA* gba) {
624 UNUSED(gba);
625
626 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
627 if (callbacks && callbacks->videoFrameStarted) {
628 callbacks->videoFrameStarted(callbacks->context);
629 }
630}
631
632void GBAFrameEnded(struct GBA* gba) {
633 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
634
635 if (gba->rr) {
636 gba->rr->nextFrame(gba->rr);
637 }
638
639 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
640 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
641 size_t i;
642 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
643 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
644 mCheatRefresh(device, &cheats->d);
645 }
646 }
647
648 if (gba->stream && gba->stream->postVideoFrame) {
649 const color_t* pixels;
650 size_t stride;
651 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
652 gba->stream->postVideoFrame(gba->stream, pixels, stride);
653 }
654
655 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
656 GBAHardwarePlayerUpdate(gba);
657 }
658
659 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
660 if (callbacks && callbacks->videoFrameEnded) {
661 callbacks->videoFrameEnded(callbacks->context);
662 }
663}
664
665void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
666 size_t immediate;
667 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
668 if (gba->cpu->components[immediate] == component) {
669 break;
670 }
671 }
672 if (immediate == gba->cpu->numComponents) {
673 return;
674 }
675 if (mode == MODE_ARM) {
676 int32_t value;
677 int32_t old;
678 value = 0xE1200070;
679 value |= immediate & 0xF;
680 value |= (immediate & 0xFFF0) << 4;
681 GBAPatch32(gba->cpu, address, value, &old);
682 *opcode = old;
683 } else {
684 int16_t value;
685 int16_t old;
686 value = 0xBE00;
687 value |= immediate & 0xFF;
688 GBAPatch16(gba->cpu, address, value, &old);
689 *opcode = (uint16_t) old;
690 }
691}
692
693void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
694 if (mode == MODE_ARM) {
695 GBAPatch32(gba->cpu, address, opcode, 0);
696 } else {
697 GBAPatch16(gba->cpu, address, opcode, 0);
698 }
699}
700
701static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
702 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
703 return true;
704}
705
706static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
707 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
708 return true;
709}