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 gba->earlyExit = false;
188 if (gba->yankedRomSize) {
189 gba->memory.romSize = gba->yankedRomSize;
190 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
191 gba->yankedRomSize = 0;
192 }
193 mTimingClear(&gba->timing);
194 GBAMemoryReset(gba);
195 GBAVideoReset(&gba->video);
196 GBAAudioReset(&gba->audio);
197 GBAIOInit(gba);
198 GBATimerInit(gba);
199
200 GBASIOReset(&gba->sio);
201
202 gba->lastJump = 0;
203 gba->haltPending = false;
204 gba->idleDetectionStep = 0;
205 gba->idleDetectionFailures = 0;
206
207 gba->debug = false;
208 memset(gba->debugString, 0, sizeof(gba->debugString));
209}
210
211void GBASkipBIOS(struct GBA* gba) {
212 struct ARMCore* cpu = gba->cpu;
213 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
214 if (gba->memory.rom) {
215 cpu->gprs[ARM_PC] = BASE_CART0;
216 } else {
217 cpu->gprs[ARM_PC] = BASE_WORKING_RAM;
218 }
219 gba->memory.io[REG_VCOUNT >> 1] = 0x7E;
220 gba->memory.io[REG_POSTFLG >> 1] = 1;
221 int currentCycles = 0;
222 ARM_WRITE_PC;
223 }
224}
225
226static void GBAProcessEvents(struct ARMCore* cpu) {
227 struct GBA* gba = (struct GBA*) cpu->master;
228
229 gba->bus = cpu->prefetch[1];
230 if (cpu->executionMode == MODE_THUMB) {
231 gba->bus |= cpu->prefetch[1] << 16;
232 }
233
234 if (gba->springIRQ && !cpu->cpsr.i) {
235 ARMRaiseIRQ(cpu);
236 gba->springIRQ = 0;
237 }
238
239 int32_t nextEvent = cpu->nextEvent;
240 while (cpu->cycles >= nextEvent) {
241 int32_t cycles = cpu->cycles;
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 cpu->nextEvent = nextEvent;
257
258 if (gba->earlyExit) {
259 gba->earlyExit = false;
260 break;
261 }
262 if (cpu->halted) {
263 cpu->cycles = nextEvent;
264 if (!gba->memory.io[REG_IME >> 1] || !gba->memory.io[REG_IE >> 1]) {
265 break;
266 }
267 }
268#ifndef NDEBUG
269 else if (nextEvent < 0) {
270 mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
271 }
272#endif
273 }
274}
275
276void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {
277 gba->debugger = (struct ARMDebugger*) debugger->platform;
278 gba->debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
279 gba->debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
280 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = &debugger->d;
281 ARMHotplugAttach(gba->cpu, CPU_COMPONENT_DEBUGGER);
282}
283
284void GBADetachDebugger(struct GBA* gba) {
285 gba->debugger = 0;
286 ARMHotplugDetach(gba->cpu, CPU_COMPONENT_DEBUGGER);
287 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = 0;
288}
289
290bool GBALoadMB(struct GBA* gba, struct VFile* vf) {
291 GBAUnloadROM(gba);
292 gba->romVf = vf;
293 gba->pristineRomSize = vf->size(vf);
294 vf->seek(vf, 0, SEEK_SET);
295 if (gba->pristineRomSize > SIZE_WORKING_RAM) {
296 gba->pristineRomSize = SIZE_WORKING_RAM;
297 }
298#ifdef _3DS
299 gba->pristineRom = 0;
300 if (gba->pristineRomSize <= romBufferSize) {
301 gba->pristineRom = romBuffer;
302 vf->read(vf, romBuffer, gba->pristineRomSize);
303 }
304#else
305 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
306#endif
307 if (!gba->pristineRom) {
308 mLOG(GBA, WARN, "Couldn't map ROM");
309 return false;
310 }
311 gba->yankedRomSize = 0;
312 gba->memory.romSize = 0;
313 gba->memory.romMask = 0;
314 gba->romCrc32 = doCrc32(gba->pristineRom, gba->pristineRomSize);
315 return true;
316}
317
318bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
319 if (!vf) {
320 return false;
321 }
322 GBAUnloadROM(gba);
323 gba->romVf = vf;
324 gba->pristineRomSize = vf->size(vf);
325 vf->seek(vf, 0, SEEK_SET);
326 if (gba->pristineRomSize > SIZE_CART0) {
327 gba->pristineRomSize = SIZE_CART0;
328 }
329#ifdef _3DS
330 gba->pristineRom = 0;
331 if (gba->pristineRomSize <= romBufferSize) {
332 gba->pristineRom = romBuffer;
333 vf->read(vf, romBuffer, gba->pristineRomSize);
334 }
335#else
336 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
337#endif
338 if (!gba->pristineRom) {
339 mLOG(GBA, WARN, "Couldn't map ROM");
340 return false;
341 }
342 gba->yankedRomSize = 0;
343 gba->memory.rom = gba->pristineRom;
344 gba->memory.romSize = gba->pristineRomSize;
345 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
346 gba->memory.mirroring = false;
347 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
348 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
349 GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
350 // TODO: error check
351 return true;
352}
353
354bool GBALoadSave(struct GBA* gba, struct VFile* sav) {
355 GBASavedataInit(&gba->memory.savedata, sav);
356 return true;
357}
358
359void GBAYankROM(struct GBA* gba) {
360 gba->yankedRomSize = gba->memory.romSize;
361 gba->memory.romSize = 0;
362 gba->memory.romMask = 0;
363 GBARaiseIRQ(gba, IRQ_GAMEPAK);
364}
365
366void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
367 gba->biosVf = vf;
368 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
369 if (!bios) {
370 mLOG(GBA, WARN, "Couldn't map BIOS");
371 return;
372 }
373 gba->memory.bios = bios;
374 gba->memory.fullBios = 1;
375 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
376 mLOG(GBA, DEBUG, "BIOS Checksum: 0x%X", checksum);
377 if (checksum == GBA_BIOS_CHECKSUM) {
378 mLOG(GBA, INFO, "Official GBA BIOS detected");
379 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
380 mLOG(GBA, INFO, "Official GBA (DS) BIOS detected");
381 } else {
382 mLOG(GBA, WARN, "BIOS checksum incorrect");
383 }
384 gba->biosChecksum = checksum;
385 if (gba->memory.activeRegion == REGION_BIOS) {
386 gba->cpu->memory.activeRegion = gba->memory.bios;
387 }
388 // TODO: error check
389}
390
391void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
392 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
393 if (!patchedSize || patchedSize > SIZE_CART0) {
394 return;
395 }
396 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
397 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
398 mappedMemoryFree(gba->memory.rom, patchedSize);
399 gba->memory.rom = gba->pristineRom;
400 return;
401 }
402 gba->memory.romSize = patchedSize;
403 gba->memory.romMask = SIZE_CART0 - 1;
404 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
405}
406
407void GBAWriteIE(struct GBA* gba, uint16_t value) {
408 if (value & (1 << IRQ_KEYPAD)) {
409 mLOG(GBA, STUB, "Keypad interrupts not implemented");
410 }
411
412 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
413 ARMRaiseIRQ(gba->cpu);
414 }
415}
416
417void GBAWriteIME(struct GBA* gba, uint16_t value) {
418 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
419 ARMRaiseIRQ(gba->cpu);
420 }
421}
422
423void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
424 gba->memory.io[REG_IF >> 1] |= 1 << irq;
425
426 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
427 gba->cpu->halted = 0;
428 if (gba->memory.io[REG_IME >> 1]) {
429 ARMRaiseIRQ(gba->cpu);
430 }
431 }
432}
433
434void GBATestIRQ(struct ARMCore* cpu) {
435 struct GBA* gba = (struct GBA*) cpu->master;
436 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
437 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
438 gba->cpu->nextEvent = gba->cpu->cycles;
439 }
440}
441
442void GBAHalt(struct GBA* gba) {
443 gba->cpu->nextEvent = gba->cpu->cycles;
444 gba->cpu->halted = 1;
445}
446
447void GBAStop(struct GBA* gba) {
448 if (!gba->stopCallback) {
449 return;
450 }
451 gba->cpu->nextEvent = gba->cpu->cycles;
452 gba->stopCallback->stop(gba->stopCallback);
453}
454
455void GBADebug(struct GBA* gba, uint16_t flags) {
456 gba->debugFlags = flags;
457 if (GBADebugFlagsIsSend(gba->debugFlags)) {
458 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
459 level &= 0x1F;
460 char oolBuf[0x101];
461 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
462 oolBuf[0x100] = '\0';
463 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
464 }
465 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
466}
467
468bool GBAIsROM(struct VFile* vf) {
469 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
470 return false;
471 }
472 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
473 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
474 return false;
475 }
476 if (GBAIsBIOS(vf)) {
477 return false;
478 }
479 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
480}
481
482bool GBAIsMB(struct VFile* vf) {
483 if (!GBAIsROM(vf)) {
484 return false;
485 }
486 if (vf->size(vf) > SIZE_WORKING_RAM) {
487 return false;
488 }
489 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
490 return false;
491 }
492 uint32_t signature;
493 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
494 return false;
495 }
496 uint32_t opcode;
497 LOAD_32(opcode, 0, &signature);
498 struct ARMInstructionInfo info;
499 ARMDecodeARM(opcode, &info);
500 if (info.branchType != ARM_BRANCH) {
501 return false;
502 }
503 if (info.op1.immediate <= 0) {
504 return false;
505 } else if (info.op1.immediate == 28) {
506 // Ancient toolchain that is known to throw MB detection for a loop
507 return false;
508 } else if (info.op1.immediate != 24) {
509 return true;
510 }
511 // Found a libgba-linked cart...these are a bit harder to detect.
512 return false;
513}
514
515bool GBAIsBIOS(struct VFile* vf) {
516 if (vf->seek(vf, 0, SEEK_SET) < 0) {
517 return false;
518 }
519 uint8_t interruptTable[7 * 4];
520 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
521 return false;
522 }
523 int i;
524 for (i = 0; i < 7; ++i) {
525 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
526 return false;
527 }
528 }
529 return true;
530}
531
532void GBAGetGameCode(const struct GBA* gba, char* out) {
533 memset(out, 0, 8);
534 if (!gba->memory.rom) {
535 return;
536 }
537
538 memcpy(out, "AGB-", 4);
539 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
540}
541
542void GBAGetGameTitle(const struct GBA* gba, char* out) {
543 if (gba->memory.rom) {
544 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
545 return;
546 }
547 if (gba->pristineRom) {
548 memcpy(out, &((struct GBACartridge*) gba->pristineRom)->title, 12);
549 return;
550 }
551 strncpy(out, "(BIOS)", 12);
552}
553
554void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
555 struct GBA* gba = (struct GBA*) cpu->master;
556#ifdef USE_DEBUGGERS
557 if (gba->debugger) {
558 struct mDebuggerEntryInfo info = {
559 .address = _ARMPCAddress(cpu),
560 .opcode = opcode
561 };
562 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
563 }
564#endif
565 // TODO: More sensible category?
566 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
567}
568
569void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
570 struct GBA* gba = (struct GBA*) cpu->master;
571 if (!gba->yankedRomSize) {
572 // TODO: More sensible category?
573 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
574 }
575#ifdef USE_DEBUGGERS
576 if (gba->debugger) {
577 struct mDebuggerEntryInfo info = {
578 .address = _ARMPCAddress(cpu),
579 .opcode = opcode
580 };
581 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
582 } else
583#endif
584 {
585 ARMRaiseUndefined(cpu);
586 }
587}
588
589void GBABreakpoint(struct ARMCore* cpu, int immediate) {
590 struct GBA* gba = (struct GBA*) cpu->master;
591 if (immediate >= CPU_COMPONENT_MAX) {
592 return;
593 }
594 switch (immediate) {
595#ifdef USE_DEBUGGERS
596 case CPU_COMPONENT_DEBUGGER:
597 if (gba->debugger) {
598 struct mDebuggerEntryInfo info = {
599 .address = _ARMPCAddress(cpu),
600 .breakType = BREAKPOINT_SOFTWARE
601 };
602 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
603 }
604 break;
605#endif
606 case CPU_COMPONENT_CHEAT_DEVICE:
607 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
608 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
609 struct GBACheatHook* hook = 0;
610 size_t i;
611 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
612 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
613 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
614 mCheatRefresh(device, &cheats->d);
615 hook = cheats->hook;
616 }
617 }
618 if (hook) {
619 ARMRunFake(cpu, hook->patchedOpcode);
620 }
621 }
622 break;
623 default:
624 break;
625 }
626}
627
628void GBAFrameStarted(struct GBA* gba) {
629 UNUSED(gba);
630
631 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
632 if (callbacks && callbacks->videoFrameStarted) {
633 callbacks->videoFrameStarted(callbacks->context);
634 }
635}
636
637void GBAFrameEnded(struct GBA* gba) {
638 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
639
640 if (gba->rr) {
641 gba->rr->nextFrame(gba->rr);
642 }
643
644 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
645 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
646 size_t i;
647 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
648 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
649 mCheatRefresh(device, &cheats->d);
650 }
651 }
652
653 if (gba->stream && gba->stream->postVideoFrame) {
654 const color_t* pixels;
655 size_t stride;
656 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
657 gba->stream->postVideoFrame(gba->stream, pixels, stride);
658 }
659
660 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
661 GBAHardwarePlayerUpdate(gba);
662 }
663
664 struct mCoreCallbacks* callbacks = gba->coreCallbacks;
665 if (callbacks && callbacks->videoFrameEnded) {
666 callbacks->videoFrameEnded(callbacks->context);
667 }
668}
669
670void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
671 size_t immediate;
672 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
673 if (gba->cpu->components[immediate] == component) {
674 break;
675 }
676 }
677 if (immediate == gba->cpu->numComponents) {
678 return;
679 }
680 if (mode == MODE_ARM) {
681 int32_t value;
682 int32_t old;
683 value = 0xE1200070;
684 value |= immediate & 0xF;
685 value |= (immediate & 0xFFF0) << 4;
686 GBAPatch32(gba->cpu, address, value, &old);
687 *opcode = old;
688 } else {
689 int16_t value;
690 int16_t old;
691 value = 0xBE00;
692 value |= immediate & 0xFF;
693 GBAPatch16(gba->cpu, address, value, &old);
694 *opcode = (uint16_t) old;
695 }
696}
697
698void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
699 if (mode == MODE_ARM) {
700 GBAPatch32(gba->cpu, address, opcode, 0);
701 } else {
702 GBAPatch16(gba->cpu, address, opcode, 0);
703 }
704}
705
706static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
707 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
708 return true;
709}
710
711static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
712 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
713 return true;
714}