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", "gba");
25mLOG_DEFINE_CATEGORY(GBA_DEBUG, "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 mCoreCallbacksListInit(&gba->coreCallbacks, 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
99 gba->realisticTiming = true;
100 gba->hardCrash = true;
101 gba->allowOpposingDirections = true;
102
103 gba->performingDMA = false;
104
105 gba->isPristine = false;
106 gba->pristineRomSize = 0;
107 gba->yankedRomSize = 0;
108
109 mTimingInit(&gba->timing, &gba->cpu->cycles, &gba->cpu->nextEvent);
110}
111
112void GBAUnloadROM(struct GBA* gba) {
113 if (gba->memory.rom && !gba->isPristine) {
114 if (gba->yankedRomSize) {
115 gba->yankedRomSize = 0;
116 }
117 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
118 }
119
120 if (gba->romVf) {
121#ifndef _3DS
122 gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->pristineRomSize);
123#endif
124 gba->romVf->close(gba->romVf);
125 gba->romVf = NULL;
126 }
127 gba->memory.rom = NULL;
128 gba->isPristine = false;
129
130 GBASavedataDeinit(&gba->memory.savedata);
131 if (gba->memory.savedata.realVf) {
132 gba->memory.savedata.realVf->close(gba->memory.savedata.realVf);
133 gba->memory.savedata.realVf = 0;
134 }
135 gba->idleLoop = IDLE_LOOP_NONE;
136}
137
138void GBADestroy(struct GBA* gba) {
139 GBAUnloadROM(gba);
140
141 if (gba->biosVf) {
142 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
143 gba->biosVf->close(gba->biosVf);
144 gba->biosVf = 0;
145 }
146
147 GBAMemoryDeinit(gba);
148 GBAVideoDeinit(&gba->video);
149 GBAAudioDeinit(&gba->audio);
150 GBASIODeinit(&gba->sio);
151 gba->rr = 0;
152 mTimingDeinit(&gba->timing);
153 mCoreCallbacksListDeinit(&gba->coreCallbacks);
154}
155
156void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
157 irqh->reset = GBAReset;
158 irqh->processEvents = GBAProcessEvents;
159 irqh->swi16 = GBASwi16;
160 irqh->swi32 = GBASwi32;
161 irqh->hitIllegal = GBAIllegal;
162 irqh->readCPSR = GBATestIRQ;
163 irqh->hitStub = GBAHitStub;
164 irqh->bkpt16 = GBABreakpoint;
165 irqh->bkpt32 = GBABreakpoint;
166}
167
168void GBAReset(struct ARMCore* cpu) {
169 ARMSetPrivilegeMode(cpu, MODE_IRQ);
170 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
171 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
172 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
173 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
174 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
175
176 struct GBA* gba = (struct GBA*) cpu->master;
177 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
178 GBASavedataUnmask(&gba->memory.savedata);
179 }
180
181 gba->cpuBlocked = false;
182 gba->earlyExit = false;
183 if (gba->yankedRomSize) {
184 gba->memory.romSize = gba->yankedRomSize;
185 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
186 gba->yankedRomSize = 0;
187 }
188 mTimingClear(&gba->timing);
189 GBAMemoryReset(gba);
190 GBAVideoReset(&gba->video);
191 GBAAudioReset(&gba->audio);
192 GBAIOInit(gba);
193 GBATimerInit(gba);
194
195 GBASIOReset(&gba->sio);
196
197 gba->lastJump = 0;
198 gba->haltPending = false;
199 gba->idleDetectionStep = 0;
200 gba->idleDetectionFailures = 0;
201
202 gba->debug = false;
203 memset(gba->debugString, 0, sizeof(gba->debugString));
204}
205
206void GBASkipBIOS(struct GBA* gba) {
207 struct ARMCore* cpu = gba->cpu;
208 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
209 if (gba->memory.rom) {
210 cpu->gprs[ARM_PC] = BASE_CART0;
211 } else {
212 cpu->gprs[ARM_PC] = BASE_WORKING_RAM;
213 }
214 gba->memory.io[REG_VCOUNT >> 1] = 0x7E;
215 gba->memory.io[REG_POSTFLG >> 1] = 1;
216 int currentCycles = 0;
217 ARM_WRITE_PC;
218 }
219}
220
221static void GBAProcessEvents(struct ARMCore* cpu) {
222 struct GBA* gba = (struct GBA*) cpu->master;
223
224 gba->bus = cpu->prefetch[1];
225 if (cpu->executionMode == MODE_THUMB) {
226 gba->bus |= cpu->prefetch[1] << 16;
227 }
228
229 if (gba->springIRQ && !cpu->cpsr.i) {
230 ARMRaiseIRQ(cpu);
231 gba->springIRQ = 0;
232 }
233
234 int32_t nextEvent = cpu->nextEvent;
235 while (cpu->cycles >= nextEvent) {
236 int32_t cycles = cpu->cycles;
237
238 cpu->cycles = 0;
239 cpu->nextEvent = INT_MAX;
240
241#ifndef NDEBUG
242 if (cycles < 0) {
243 mLOG(GBA, FATAL, "Negative cycles passed: %i", cycles);
244 }
245#endif
246 nextEvent = cycles;
247 do {
248 nextEvent = mTimingTick(&gba->timing, nextEvent);
249 } while (gba->cpuBlocked);
250
251 cpu->nextEvent = nextEvent;
252
253 if (gba->earlyExit) {
254 gba->earlyExit = false;
255 break;
256 }
257 if (cpu->halted) {
258 cpu->cycles = nextEvent;
259 if (!gba->memory.io[REG_IME >> 1] || !gba->memory.io[REG_IE >> 1]) {
260 break;
261 }
262 }
263#ifndef NDEBUG
264 else if (nextEvent < 0) {
265 mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
266 }
267#endif
268 }
269}
270
271void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {
272 gba->debugger = (struct ARMDebugger*) debugger->platform;
273 gba->debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
274 gba->debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
275 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = &debugger->d;
276 ARMHotplugAttach(gba->cpu, CPU_COMPONENT_DEBUGGER);
277}
278
279void GBADetachDebugger(struct GBA* gba) {
280 gba->debugger = 0;
281 ARMHotplugDetach(gba->cpu, CPU_COMPONENT_DEBUGGER);
282 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = 0;
283}
284
285bool GBALoadMB(struct GBA* gba, struct VFile* vf) {
286 GBAUnloadROM(gba);
287 gba->romVf = vf;
288 gba->pristineRomSize = vf->size(vf);
289 vf->seek(vf, 0, SEEK_SET);
290 if (gba->pristineRomSize > SIZE_WORKING_RAM) {
291 gba->pristineRomSize = SIZE_WORKING_RAM;
292 }
293 gba->isPristine = true;
294#ifdef _3DS
295 if (gba->pristineRomSize <= romBufferSize) {
296 gba->memory.wram = romBuffer;
297 vf->read(vf, romBuffer, gba->pristineRomSize);
298 }
299#else
300 gba->memory.wram = vf->map(vf, gba->pristineRomSize, MAP_READ);
301#endif
302 if (!gba->memory.wram) {
303 mLOG(GBA, WARN, "Couldn't map ROM");
304 return false;
305 }
306 gba->yankedRomSize = 0;
307 gba->memory.romSize = 0;
308 gba->memory.romMask = 0;
309 gba->romCrc32 = doCrc32(gba->memory.wram, gba->pristineRomSize);
310 return true;
311}
312
313bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
314 if (!vf) {
315 return false;
316 }
317 GBAUnloadROM(gba);
318 gba->romVf = vf;
319 gba->pristineRomSize = vf->size(vf);
320 vf->seek(vf, 0, SEEK_SET);
321 if (gba->pristineRomSize > SIZE_CART0) {
322 gba->pristineRomSize = SIZE_CART0;
323 }
324 gba->isPristine = true;
325#ifdef _3DS
326 if (gba->pristineRomSize <= romBufferSize) {
327 gba->memory.rom = romBuffer;
328 vf->read(vf, romBuffer, gba->pristineRomSize);
329 }
330#else
331 gba->memory.rom = vf->map(vf, gba->pristineRomSize, MAP_READ);
332#endif
333 if (!gba->memory.rom) {
334 mLOG(GBA, WARN, "Couldn't map ROM");
335 return false;
336 }
337 gba->yankedRomSize = 0;
338 gba->memory.romSize = gba->pristineRomSize;
339 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
340 gba->memory.mirroring = false;
341 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
342 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
343 GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
344 // TODO: error check
345 return true;
346}
347
348bool GBALoadSave(struct GBA* gba, struct VFile* sav) {
349 GBASavedataInit(&gba->memory.savedata, sav);
350 return true;
351}
352
353void GBAYankROM(struct GBA* gba) {
354 gba->yankedRomSize = gba->memory.romSize;
355 gba->memory.romSize = 0;
356 gba->memory.romMask = 0;
357 GBARaiseIRQ(gba, IRQ_GAMEPAK);
358}
359
360void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
361 gba->biosVf = vf;
362 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
363 if (!bios) {
364 mLOG(GBA, WARN, "Couldn't map BIOS");
365 return;
366 }
367 gba->memory.bios = bios;
368 gba->memory.fullBios = 1;
369 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
370 mLOG(GBA, DEBUG, "BIOS Checksum: 0x%X", checksum);
371 if (checksum == GBA_BIOS_CHECKSUM) {
372 mLOG(GBA, INFO, "Official GBA BIOS detected");
373 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
374 mLOG(GBA, INFO, "Official GBA (DS) BIOS detected");
375 } else {
376 mLOG(GBA, WARN, "BIOS checksum incorrect");
377 }
378 gba->biosChecksum = checksum;
379 if (gba->memory.activeRegion == REGION_BIOS) {
380 gba->cpu->memory.activeRegion = gba->memory.bios;
381 }
382 // TODO: error check
383}
384
385void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
386 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
387 if (!patchedSize || patchedSize > SIZE_CART0) {
388 return;
389 }
390 void* newRom = anonymousMemoryMap(SIZE_CART0);
391 if (!patch->applyPatch(patch, gba->memory.rom, gba->pristineRomSize, newRom, patchedSize)) {
392 mappedMemoryFree(newRom, SIZE_CART0);
393 return;
394 }
395 if (gba->romVf) {
396#ifndef _3DS
397 gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->pristineRomSize);
398#endif
399 gba->romVf->close(gba->romVf);
400 gba->romVf = NULL;
401 }
402 gba->isPristine = false;
403 gba->memory.rom = newRom;
404 gba->memory.hw.gpioBase = &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1];
405 gba->memory.romSize = patchedSize;
406 gba->memory.romMask = SIZE_CART0 - 1;
407 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
408}
409
410void GBAWriteIE(struct GBA* gba, uint16_t value) {
411 if (value & (1 << IRQ_KEYPAD)) {
412 mLOG(GBA, STUB, "Keypad interrupts not implemented");
413 }
414
415 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
416 ARMRaiseIRQ(gba->cpu);
417 }
418}
419
420void GBAWriteIME(struct GBA* gba, uint16_t value) {
421 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
422 ARMRaiseIRQ(gba->cpu);
423 }
424}
425
426void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
427 gba->memory.io[REG_IF >> 1] |= 1 << irq;
428
429 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
430 gba->cpu->halted = 0;
431 if (gba->memory.io[REG_IME >> 1]) {
432 ARMRaiseIRQ(gba->cpu);
433 }
434 }
435}
436
437void GBATestIRQ(struct ARMCore* cpu) {
438 struct GBA* gba = (struct GBA*) cpu->master;
439 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
440 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
441 gba->cpu->nextEvent = gba->cpu->cycles;
442 }
443}
444
445void GBAHalt(struct GBA* gba) {
446 gba->cpu->nextEvent = gba->cpu->cycles;
447 gba->cpu->halted = 1;
448}
449
450void GBAStop(struct GBA* gba) {
451 size_t c;
452 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
453 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
454 if (callbacks->sleep) {
455 callbacks->sleep(callbacks->context);
456 }
457 }
458 gba->cpu->nextEvent = gba->cpu->cycles;
459}
460
461void GBADebug(struct GBA* gba, uint16_t flags) {
462 gba->debugFlags = flags;
463 if (GBADebugFlagsIsSend(gba->debugFlags)) {
464 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
465 level &= 0x1F;
466 char oolBuf[0x101];
467 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
468 oolBuf[0x100] = '\0';
469 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
470 }
471 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
472}
473
474bool GBAIsROM(struct VFile* vf) {
475 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
476 return false;
477 }
478 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
479 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
480 return false;
481 }
482 if (GBAIsBIOS(vf)) {
483 return false;
484 }
485 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
486}
487
488bool GBAIsMB(struct VFile* vf) {
489 if (!GBAIsROM(vf)) {
490 return false;
491 }
492 if (vf->size(vf) > SIZE_WORKING_RAM) {
493 return false;
494 }
495 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
496 return false;
497 }
498 uint32_t signature;
499 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
500 return false;
501 }
502 uint32_t opcode;
503 LOAD_32(opcode, 0, &signature);
504 struct ARMInstructionInfo info;
505 ARMDecodeARM(opcode, &info);
506 if (info.branchType != ARM_BRANCH) {
507 return false;
508 }
509 if (info.op1.immediate <= 0) {
510 return false;
511 } else if (info.op1.immediate == 28) {
512 // Ancient toolchain that is known to throw MB detection for a loop
513 return false;
514 } else if (info.op1.immediate != 24) {
515 return true;
516 }
517 // Found a libgba-linked cart...these are a bit harder to detect.
518 return false;
519}
520
521bool GBAIsBIOS(struct VFile* vf) {
522 if (vf->seek(vf, 0, SEEK_SET) < 0) {
523 return false;
524 }
525 uint8_t interruptTable[7 * 4];
526 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
527 return false;
528 }
529 int i;
530 for (i = 0; i < 7; ++i) {
531 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
532 return false;
533 }
534 }
535 return true;
536}
537
538void GBAGetGameCode(const struct GBA* gba, char* out) {
539 memset(out, 0, 8);
540 if (!gba->memory.rom) {
541 return;
542 }
543
544 memcpy(out, "AGB-", 4);
545 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
546}
547
548void GBAGetGameTitle(const struct GBA* gba, char* out) {
549 if (gba->memory.rom) {
550 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
551 return;
552 }
553 if (gba->isPristine && gba->memory.wram) {
554 memcpy(out, &((struct GBACartridge*) gba->memory.wram)->title, 12);
555 return;
556 }
557 strncpy(out, "(BIOS)", 12);
558}
559
560void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
561 struct GBA* gba = (struct GBA*) cpu->master;
562#ifdef USE_DEBUGGERS
563 if (gba->debugger) {
564 struct mDebuggerEntryInfo info = {
565 .address = _ARMPCAddress(cpu),
566 .opcode = opcode
567 };
568 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
569 }
570#endif
571 // TODO: More sensible category?
572 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
573}
574
575void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
576 struct GBA* gba = (struct GBA*) cpu->master;
577 if (!gba->yankedRomSize) {
578 // TODO: More sensible category?
579 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
580 }
581 if (cpu->executionMode == MODE_THUMB && (opcode & 0xFFC0) == 0xE800) {
582 mLOG(GBA, DEBUG, "Hit Wii U VC opcode: %08x", opcode);
583 return;
584 }
585#ifdef USE_DEBUGGERS
586 if (gba->debugger) {
587 struct mDebuggerEntryInfo info = {
588 .address = _ARMPCAddress(cpu),
589 .opcode = opcode
590 };
591 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
592 } else
593#endif
594 {
595 ARMRaiseUndefined(cpu);
596 }
597}
598
599void GBABreakpoint(struct ARMCore* cpu, int immediate) {
600 struct GBA* gba = (struct GBA*) cpu->master;
601 if (immediate >= CPU_COMPONENT_MAX) {
602 return;
603 }
604 switch (immediate) {
605#ifdef USE_DEBUGGERS
606 case CPU_COMPONENT_DEBUGGER:
607 if (gba->debugger) {
608 struct mDebuggerEntryInfo info = {
609 .address = _ARMPCAddress(cpu),
610 .breakType = BREAKPOINT_SOFTWARE
611 };
612 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
613 }
614 break;
615#endif
616 case CPU_COMPONENT_CHEAT_DEVICE:
617 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
618 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
619 struct GBACheatHook* hook = 0;
620 size_t i;
621 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
622 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
623 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
624 mCheatRefresh(device, &cheats->d);
625 hook = cheats->hook;
626 }
627 }
628 if (hook) {
629 ARMRunFake(cpu, hook->patchedOpcode);
630 }
631 }
632 break;
633 default:
634 break;
635 }
636}
637
638void GBAFrameStarted(struct GBA* gba) {
639 UNUSED(gba);
640
641 size_t c;
642 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
643 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
644 if (callbacks->videoFrameStarted) {
645 callbacks->videoFrameStarted(callbacks->context);
646 }
647 }
648}
649
650void GBAFrameEnded(struct GBA* gba) {
651 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
652
653 if (gba->rr) {
654 gba->rr->nextFrame(gba->rr);
655 }
656
657 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
658 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
659 size_t i;
660 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
661 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
662 mCheatRefresh(device, &cheats->d);
663 }
664 }
665
666 if (gba->stream && gba->stream->postVideoFrame) {
667 const color_t* pixels;
668 size_t stride;
669 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
670 gba->stream->postVideoFrame(gba->stream, pixels, stride);
671 }
672
673 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
674 GBAHardwarePlayerUpdate(gba);
675 }
676
677 size_t c;
678 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
679 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
680 if (callbacks->videoFrameEnded) {
681 callbacks->videoFrameEnded(callbacks->context);
682 }
683 }
684}
685
686void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
687 size_t immediate;
688 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
689 if (gba->cpu->components[immediate] == component) {
690 break;
691 }
692 }
693 if (immediate == gba->cpu->numComponents) {
694 return;
695 }
696 if (mode == MODE_ARM) {
697 int32_t value;
698 int32_t old;
699 value = 0xE1200070;
700 value |= immediate & 0xF;
701 value |= (immediate & 0xFFF0) << 4;
702 GBAPatch32(gba->cpu, address, value, &old);
703 *opcode = old;
704 } else {
705 int16_t value;
706 int16_t old;
707 value = 0xBE00;
708 value |= immediate & 0xFF;
709 GBAPatch16(gba->cpu, address, value, &old);
710 *opcode = (uint16_t) old;
711 }
712}
713
714void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
715 if (mode == MODE_ARM) {
716 GBAPatch32(gba->cpu, address, opcode, 0);
717 } else {
718 GBAPatch16(gba->cpu, address, opcode, 0);
719 }
720}
721
722static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
723 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
724 return true;
725}
726
727static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
728 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
729 return true;
730}