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 "core/thread.h"
9
10#include "arm/decoder.h"
11#include "arm/debugger/debugger.h"
12#include "arm/isa-inlines.h"
13
14#include "gba/bios.h"
15#include "gba/cheats.h"
16#include "gba/io.h"
17#include "gba/overrides.h"
18#include "gba/rr/rr.h"
19#include "gba/serialize.h"
20#include "gba/sio.h"
21#include "gba/timer.h"
22#include "gba/vfame.h"
23
24#include "util/crc32.h"
25#include "util/memory.h"
26#include "util/math.h"
27#include "util/patch.h"
28#include "util/vfs.h"
29
30mLOG_DEFINE_CATEGORY(GBA, "GBA");
31mLOG_DEFINE_CATEGORY(GBA_DEBUG, "GBA Debug");
32
33const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
34
35static const size_t GBA_ROM_MAGIC_OFFSET = 3;
36static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
37
38static const size_t GBA_MB_MAGIC_OFFSET = 0xC0;
39
40static void GBAInit(void* cpu, struct mCPUComponent* component);
41static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
42static void GBAProcessEvents(struct ARMCore* cpu);
43static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
44static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
45static void GBABreakpoint(struct ARMCore* cpu, int immediate);
46
47static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
48static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
49
50
51#ifdef _3DS
52extern uint32_t* romBuffer;
53extern size_t romBufferSize;
54#endif
55
56void GBACreate(struct GBA* gba) {
57 gba->d.id = GBA_COMPONENT_MAGIC;
58 gba->d.init = GBAInit;
59 gba->d.deinit = 0;
60}
61
62static void GBAInit(void* cpu, struct mCPUComponent* component) {
63 struct GBA* gba = (struct GBA*) component;
64 gba->cpu = cpu;
65 gba->debugger = 0;
66 gba->sync = 0;
67
68 GBAInterruptHandlerInit(&gba->cpu->irqh);
69 GBAMemoryInit(gba);
70 GBASavedataInit(&gba->memory.savedata, 0);
71
72 gba->video.p = gba;
73 GBAVideoInit(&gba->video);
74
75 gba->audio.p = gba;
76 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
77
78 GBAIOInit(gba);
79
80 gba->sio.p = gba;
81 GBASIOInit(&gba->sio);
82
83 gba->springIRQ = 0;
84 gba->keySource = 0;
85 gba->rotationSource = 0;
86 gba->luminanceSource = 0;
87 gba->rtcSource = 0;
88 gba->rumble = 0;
89 gba->rr = 0;
90
91 gba->romVf = 0;
92 gba->biosVf = 0;
93
94 gba->stream = NULL;
95 gba->keyCallback = NULL;
96 gba->stopCallback = NULL;
97 gba->stopCallback = NULL;
98 gba->coreCallbacks = NULL;
99
100 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
101
102 gba->idleOptimization = IDLE_LOOP_REMOVE;
103 gba->idleLoop = IDLE_LOOP_NONE;
104
105 gba->realisticTiming = true;
106 gba->hardCrash = true;
107 gba->allowOpposingDirections = true;
108
109 gba->performingDMA = false;
110
111 gba->pristineRom = 0;
112 gba->pristineRomSize = 0;
113 gba->yankedRomSize = 0;
114
115 mTimingInit(&gba->timing, &gba->cpu->cycles, &gba->cpu->nextEvent);
116}
117
118void GBAUnloadROM(struct GBA* gba) {
119 if (gba->memory.rom && gba->pristineRom != gba->memory.rom) {
120 if (gba->yankedRomSize) {
121 gba->yankedRomSize = 0;
122 }
123 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
124 }
125 gba->memory.rom = 0;
126
127 if (gba->romVf) {
128#ifndef _3DS
129 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
130#endif
131 gba->romVf->close(gba->romVf);
132 gba->romVf = 0;
133 }
134 gba->pristineRom = 0;
135
136 GBASavedataDeinit(&gba->memory.savedata);
137 if (gba->memory.savedata.realVf) {
138 gba->memory.savedata.realVf->close(gba->memory.savedata.realVf);
139 gba->memory.savedata.realVf = 0;
140 }
141 gba->idleLoop = IDLE_LOOP_NONE;
142}
143
144void GBADestroy(struct GBA* gba) {
145 GBAUnloadROM(gba);
146
147 if (gba->biosVf) {
148 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
149 gba->biosVf->close(gba->biosVf);
150 gba->biosVf = 0;
151 }
152
153 GBAMemoryDeinit(gba);
154 GBAVideoDeinit(&gba->video);
155 GBAAudioDeinit(&gba->audio);
156 GBASIODeinit(&gba->sio);
157 gba->rr = 0;
158 mTimingDeinit(&gba->timing);
159}
160
161void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
162 irqh->reset = GBAReset;
163 irqh->processEvents = GBAProcessEvents;
164 irqh->swi16 = GBASwi16;
165 irqh->swi32 = GBASwi32;
166 irqh->hitIllegal = GBAIllegal;
167 irqh->readCPSR = GBATestIRQ;
168 irqh->hitStub = GBAHitStub;
169 irqh->bkpt16 = GBABreakpoint;
170 irqh->bkpt32 = GBABreakpoint;
171}
172
173void GBAReset(struct ARMCore* cpu) {
174 ARMSetPrivilegeMode(cpu, MODE_IRQ);
175 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
176 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
177 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
178 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
179 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
180
181 struct GBA* gba = (struct GBA*) cpu->master;
182 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
183 GBASavedataUnmask(&gba->memory.savedata);
184 }
185
186 gba->cpuBlocked = false;
187 if (gba->yankedRomSize) {
188 gba->memory.romSize = gba->yankedRomSize;
189 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
190 gba->yankedRomSize = 0;
191 }
192 mTimingClear(&gba->timing);
193 GBAMemoryReset(gba);
194 GBAVideoReset(&gba->video);
195 GBAAudioReset(&gba->audio);
196 GBAIOInit(gba);
197 GBATimerInit(gba);
198
199 GBASIOReset(&gba->sio);
200
201 gba->lastJump = 0;
202 gba->haltPending = false;
203 gba->idleDetectionStep = 0;
204 gba->idleDetectionFailures = 0;
205
206 gba->debug = false;
207 memset(gba->debugString, 0, sizeof(gba->debugString));
208}
209
210void GBASkipBIOS(struct GBA* gba) {
211 struct ARMCore* cpu = gba->cpu;
212 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
213 if (gba->memory.rom) {
214 cpu->gprs[ARM_PC] = BASE_CART0;
215 } else {
216 cpu->gprs[ARM_PC] = BASE_WORKING_RAM;
217 }
218 gba->memory.io[REG_VCOUNT >> 1] = 0x7E;
219 gba->memory.io[REG_POSTFLG >> 1] = 1;
220 int currentCycles = 0;
221 ARM_WRITE_PC;
222 }
223}
224
225static void GBAProcessEvents(struct ARMCore* cpu) {
226 struct GBA* gba = (struct GBA*) cpu->master;
227
228 gba->bus = cpu->prefetch[1];
229 if (cpu->executionMode == MODE_THUMB) {
230 gba->bus |= cpu->prefetch[1] << 16;
231 }
232
233 if (gba->springIRQ && !cpu->cpsr.i) {
234 ARMRaiseIRQ(cpu);
235 gba->springIRQ = 0;
236 }
237
238 int32_t nextEvent = cpu->nextEvent;
239 while (cpu->cycles >= nextEvent) {
240 int32_t cycles = cpu->cycles;
241 int32_t testEvent;
242
243 cpu->cycles = 0;
244 cpu->nextEvent = INT_MAX;
245
246#ifndef NDEBUG
247 if (cycles < 0) {
248 mLOG(GBA, FATAL, "Negative cycles passed: %i", cycles);
249 }
250#endif
251 nextEvent = cycles;
252 do {
253 nextEvent = mTimingTick(&gba->timing, nextEvent);
254 } while (gba->cpuBlocked);
255
256 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
257 if (testEvent < nextEvent) {
258 nextEvent = testEvent;
259 }
260
261 cpu->nextEvent = nextEvent;
262
263 if (nextEvent == 0) {
264 break;
265 }
266 if (cpu->halted) {
267 cpu->cycles = nextEvent;
268 if (!gba->memory.io[REG_IME >> 1] || !gba->memory.io[REG_IE >> 1]) {
269 break;
270 }
271 }
272#ifndef NDEBUG
273 else if (nextEvent < 0) {
274 mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
275 }
276#endif
277 }
278}
279
280void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {
281 gba->debugger = (struct ARMDebugger*) debugger->platform;
282 gba->debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
283 gba->debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
284 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = &debugger->d;
285 ARMHotplugAttach(gba->cpu, CPU_COMPONENT_DEBUGGER);
286}
287
288void GBADetachDebugger(struct GBA* gba) {
289 gba->debugger = 0;
290 ARMHotplugDetach(gba->cpu, CPU_COMPONENT_DEBUGGER);
291 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = 0;
292}
293
294bool GBALoadMB(struct GBA* gba, struct VFile* vf) {
295 GBAUnloadROM(gba);
296 gba->romVf = vf;
297 gba->pristineRomSize = vf->size(vf);
298 vf->seek(vf, 0, SEEK_SET);
299 if (gba->pristineRomSize > SIZE_WORKING_RAM) {
300 gba->pristineRomSize = SIZE_WORKING_RAM;
301 }
302#ifdef _3DS
303 gba->pristineRom = 0;
304 if (gba->pristineRomSize <= romBufferSize) {
305 gba->pristineRom = romBuffer;
306 vf->read(vf, romBuffer, gba->pristineRomSize);
307 }
308#else
309 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
310#endif
311 if (!gba->pristineRom) {
312 mLOG(GBA, WARN, "Couldn't map ROM");
313 return false;
314 }
315 gba->yankedRomSize = 0;
316 gba->memory.romSize = 0;
317 gba->memory.romMask = 0;
318 gba->romCrc32 = doCrc32(gba->pristineRom, gba->pristineRomSize);
319 return true;
320}
321
322bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
323 if (!vf) {
324 return false;
325 }
326 GBAUnloadROM(gba);
327 gba->romVf = vf;
328 gba->pristineRomSize = vf->size(vf);
329 vf->seek(vf, 0, SEEK_SET);
330 if (gba->pristineRomSize > SIZE_CART0) {
331 gba->pristineRomSize = SIZE_CART0;
332 }
333#ifdef _3DS
334 gba->pristineRom = 0;
335 if (gba->pristineRomSize <= romBufferSize) {
336 gba->pristineRom = romBuffer;
337 vf->read(vf, romBuffer, gba->pristineRomSize);
338 }
339#else
340 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
341#endif
342 if (!gba->pristineRom) {
343 mLOG(GBA, WARN, "Couldn't map ROM");
344 return false;
345 }
346 gba->yankedRomSize = 0;
347 gba->memory.rom = gba->pristineRom;
348 gba->memory.romSize = gba->pristineRomSize;
349 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
350 gba->memory.mirroring = false;
351 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
352 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
353 GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
354 // TODO: error check
355 return true;
356}
357
358bool GBALoadSave(struct GBA* gba, struct VFile* sav) {
359 GBASavedataInit(&gba->memory.savedata, sav);
360 return true;
361}
362
363void GBAYankROM(struct GBA* gba) {
364 gba->yankedRomSize = gba->memory.romSize;
365 gba->memory.romSize = 0;
366 gba->memory.romMask = 0;
367 GBARaiseIRQ(gba, IRQ_GAMEPAK);
368}
369
370void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
371 gba->biosVf = vf;
372 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
373 if (!bios) {
374 mLOG(GBA, WARN, "Couldn't map BIOS");
375 return;
376 }
377 gba->memory.bios = bios;
378 gba->memory.fullBios = 1;
379 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
380 mLOG(GBA, DEBUG, "BIOS Checksum: 0x%X", checksum);
381 if (checksum == GBA_BIOS_CHECKSUM) {
382 mLOG(GBA, INFO, "Official GBA BIOS detected");
383 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
384 mLOG(GBA, INFO, "Official GBA (DS) BIOS detected");
385 } else {
386 mLOG(GBA, WARN, "BIOS checksum incorrect");
387 }
388 gba->biosChecksum = checksum;
389 if (gba->memory.activeRegion == REGION_BIOS) {
390 gba->cpu->memory.activeRegion = gba->memory.bios;
391 }
392 // TODO: error check
393}
394
395void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
396 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
397 if (!patchedSize || patchedSize > SIZE_CART0) {
398 return;
399 }
400 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
401 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
402 mappedMemoryFree(gba->memory.rom, patchedSize);
403 gba->memory.rom = gba->pristineRom;
404 return;
405 }
406 gba->memory.romSize = patchedSize;
407 gba->memory.romMask = SIZE_CART0 - 1;
408 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
409}
410
411void GBAWriteIE(struct GBA* gba, uint16_t value) {
412 if (value & (1 << IRQ_KEYPAD)) {
413 mLOG(GBA, STUB, "Keypad interrupts not implemented");
414 }
415
416 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
417 ARMRaiseIRQ(gba->cpu);
418 }
419}
420
421void GBAWriteIME(struct GBA* gba, uint16_t value) {
422 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
423 ARMRaiseIRQ(gba->cpu);
424 }
425}
426
427void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
428 gba->memory.io[REG_IF >> 1] |= 1 << irq;
429
430 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
431 gba->cpu->halted = 0;
432 if (gba->memory.io[REG_IME >> 1]) {
433 ARMRaiseIRQ(gba->cpu);
434 }
435 }
436}
437
438void GBATestIRQ(struct ARMCore* cpu) {
439 struct GBA* gba = (struct GBA*) cpu->master;
440 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
441 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
442 gba->cpu->nextEvent = gba->cpu->cycles;
443 }
444}
445
446void GBAHalt(struct GBA* gba) {
447 gba->cpu->nextEvent = gba->cpu->cycles;
448 gba->cpu->halted = 1;
449}
450
451void GBAStop(struct GBA* gba) {
452 if (!gba->stopCallback) {
453 return;
454 }
455 gba->cpu->nextEvent = gba->cpu->cycles;
456 gba->stopCallback->stop(gba->stopCallback);
457}
458
459void GBADebug(struct GBA* gba, uint16_t flags) {
460 gba->debugFlags = flags;
461 if (GBADebugFlagsIsSend(gba->debugFlags)) {
462 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
463 level &= 0x1F;
464 char oolBuf[0x101];
465 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
466 oolBuf[0x100] = '\0';
467 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
468 }
469 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
470}
471
472bool GBAIsROM(struct VFile* vf) {
473 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
474 return false;
475 }
476 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
477 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
478 return false;
479 }
480 if (GBAIsBIOS(vf)) {
481 return false;
482 }
483 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
484}
485
486bool GBAIsMB(struct VFile* vf) {
487 if (!GBAIsROM(vf)) {
488 return false;
489 }
490 if (vf->size(vf) > SIZE_WORKING_RAM) {
491 return false;
492 }
493 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
494 return false;
495 }
496 uint32_t signature;
497 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
498 return false;
499 }
500 uint32_t opcode;
501 LOAD_32(opcode, 0, &signature);
502 struct ARMInstructionInfo info;
503 ARMDecodeARM(opcode, &info);
504 if (info.branchType != ARM_BRANCH) {
505 return false;
506 }
507 if (info.op1.immediate <= 0) {
508 return false;
509 } else if (info.op1.immediate == 28) {
510 // Ancient toolchain that is known to throw MB detection for a loop
511 return false;
512 } else if (info.op1.immediate != 24) {
513 return true;
514 }
515 // Found a libgba-linked cart...these are a bit harder to detect.
516 return false;
517}
518
519bool GBAIsBIOS(struct VFile* vf) {
520 if (vf->seek(vf, 0, SEEK_SET) < 0) {
521 return false;
522 }
523 uint8_t interruptTable[7 * 4];
524 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
525 return false;
526 }
527 int i;
528 for (i = 0; i < 7; ++i) {
529 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
530 return false;
531 }
532 }
533 return true;
534}
535
536void GBAGetGameCode(const struct GBA* gba, char* out) {
537 memset(out, 0, 8);
538 if (!gba->memory.rom) {
539 return;
540 }
541
542 memcpy(out, "AGB-", 4);
543 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
544}
545
546void GBAGetGameTitle(const struct GBA* gba, char* out) {
547 if (gba->memory.rom) {
548 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
549 return;
550 }
551 if (gba->pristineRom) {
552 memcpy(out, &((struct GBACartridge*) gba->pristineRom)->title, 12);
553 return;
554 }
555 strncpy(out, "(BIOS)", 12);
556}
557
558void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
559 struct GBA* gba = (struct GBA*) cpu->master;
560#ifdef USE_DEBUGGERS
561 if (gba->debugger) {
562 struct mDebuggerEntryInfo info = {
563 .address = _ARMPCAddress(cpu),
564 .opcode = opcode
565 };
566 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
567 }
568#endif
569 // TODO: More sensible category?
570 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
571}
572
573void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
574 struct GBA* gba = (struct GBA*) cpu->master;
575 if (!gba->yankedRomSize) {
576 // TODO: More sensible category?
577 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
578 }
579#ifdef USE_DEBUGGERS
580 if (gba->debugger) {
581 struct mDebuggerEntryInfo info = {
582 .address = _ARMPCAddress(cpu),
583 .opcode = opcode
584 };
585 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
586 } else
587#endif
588 {
589 ARMRaiseUndefined(cpu);
590 }
591}
592
593void GBABreakpoint(struct ARMCore* cpu, int immediate) {
594 struct GBA* gba = (struct GBA*) cpu->master;
595 if (immediate >= CPU_COMPONENT_MAX) {
596 return;
597 }
598 switch (immediate) {
599#ifdef USE_DEBUGGERS
600 case CPU_COMPONENT_DEBUGGER:
601 if (gba->debugger) {
602 struct mDebuggerEntryInfo info = {
603 .address = _ARMPCAddress(cpu),
604 .breakType = BREAKPOINT_SOFTWARE
605 };
606 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
607 }
608 break;
609#endif
610 case CPU_COMPONENT_CHEAT_DEVICE:
611 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
612 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
613 struct GBACheatHook* hook = 0;
614 size_t i;
615 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
616 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
617 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
618 mCheatRefresh(device, &cheats->d);
619 hook = cheats->hook;
620 }
621 }
622 if (hook) {
623 ARMRunFake(cpu, hook->patchedOpcode);
624 }
625 }
626 break;
627 default:
628 break;
629 }
630}
631
632void GBAFrameStarted(struct GBA* gba) {
633 UNUSED(gba);
634
635 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
636 if (callbacks && callbacks->videoFrameStarted) {
637 callbacks->videoFrameStarted(callbacks->context);
638 }
639}
640
641void GBAFrameEnded(struct GBA* gba) {
642 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
643
644 if (gba->rr) {
645 gba->rr->nextFrame(gba->rr);
646 }
647
648 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
649 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
650 size_t i;
651 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
652 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
653 mCheatRefresh(device, &cheats->d);
654 }
655 }
656
657 if (gba->stream && gba->stream->postVideoFrame) {
658 const color_t* pixels;
659 size_t stride;
660 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
661 gba->stream->postVideoFrame(gba->stream, pixels, stride);
662 }
663
664 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
665 GBAHardwarePlayerUpdate(gba);
666 }
667
668 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
669 if (callbacks && callbacks->videoFrameEnded) {
670 callbacks->videoFrameEnded(callbacks->context);
671 }
672}
673
674void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
675 size_t immediate;
676 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
677 if (gba->cpu->components[immediate] == component) {
678 break;
679 }
680 }
681 if (immediate == gba->cpu->numComponents) {
682 return;
683 }
684 if (mode == MODE_ARM) {
685 int32_t value;
686 int32_t old;
687 value = 0xE1200070;
688 value |= immediate & 0xF;
689 value |= (immediate & 0xFFF0) << 4;
690 GBAPatch32(gba->cpu, address, value, &old);
691 *opcode = old;
692 } else {
693 int16_t value;
694 int16_t old;
695 value = 0xBE00;
696 value |= immediate & 0xFF;
697 GBAPatch16(gba->cpu, address, value, &old);
698 *opcode = (uint16_t) old;
699 }
700}
701
702void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
703 if (mode == MODE_ARM) {
704 GBAPatch32(gba->cpu, address, opcode, 0);
705 } else {
706 GBAPatch16(gba->cpu, address, opcode, 0);
707 }
708}
709
710static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
711 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
712 return true;
713}
714
715static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
716 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
717 return true;
718}