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 GBAHardwareInit(&gba->memory.hw, NULL);
80
81 gba->springIRQ = 0;
82 gba->keySource = 0;
83 gba->rotationSource = 0;
84 gba->luminanceSource = 0;
85 gba->rtcSource = 0;
86 gba->rumble = 0;
87 gba->rr = 0;
88
89 gba->romVf = 0;
90 gba->biosVf = 0;
91
92 gba->stream = NULL;
93 gba->keyCallback = NULL;
94 mCoreCallbacksListInit(&gba->coreCallbacks, 0);
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->isPristine = false;
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->isPristine) {
116 if (gba->yankedRomSize) {
117 gba->yankedRomSize = 0;
118 }
119 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
120 }
121
122 if (gba->romVf) {
123#ifndef _3DS
124 gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->pristineRomSize);
125#endif
126 gba->romVf->close(gba->romVf);
127 gba->romVf = NULL;
128 }
129 gba->memory.rom = NULL;
130 gba->isPristine = false;
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 mCoreCallbacksListDeinit(&gba->coreCallbacks);
156}
157
158void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
159 irqh->reset = GBAReset;
160 irqh->processEvents = GBAProcessEvents;
161 irqh->swi16 = GBASwi16;
162 irqh->swi32 = GBASwi32;
163 irqh->hitIllegal = GBAIllegal;
164 irqh->readCPSR = GBATestIRQ;
165 irqh->hitStub = GBAHitStub;
166 irqh->bkpt16 = GBABreakpoint;
167 irqh->bkpt32 = GBABreakpoint;
168}
169
170void GBAReset(struct ARMCore* cpu) {
171 ARMSetPrivilegeMode(cpu, MODE_IRQ);
172 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
173 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
174 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
175 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
176 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
177
178 struct GBA* gba = (struct GBA*) cpu->master;
179 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
180 GBASavedataUnmask(&gba->memory.savedata);
181 }
182
183 gba->cpuBlocked = false;
184 gba->earlyExit = false;
185 if (gba->yankedRomSize) {
186 gba->memory.romSize = gba->yankedRomSize;
187 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
188 gba->yankedRomSize = 0;
189 }
190 mTimingClear(&gba->timing);
191 GBAMemoryReset(gba);
192 GBAVideoReset(&gba->video);
193 GBAAudioReset(&gba->audio);
194 GBAIOInit(gba);
195 GBATimerInit(gba);
196
197 GBASIOReset(&gba->sio);
198
199 gba->lastJump = 0;
200 gba->haltPending = false;
201 gba->idleDetectionStep = 0;
202 gba->idleDetectionFailures = 0;
203
204 gba->debug = false;
205 memset(gba->debugString, 0, sizeof(gba->debugString));
206}
207
208void GBASkipBIOS(struct GBA* gba) {
209 struct ARMCore* cpu = gba->cpu;
210 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
211 if (gba->memory.rom) {
212 cpu->gprs[ARM_PC] = BASE_CART0;
213 } else {
214 cpu->gprs[ARM_PC] = BASE_WORKING_RAM;
215 }
216 gba->memory.io[REG_VCOUNT >> 1] = 0x7E;
217 gba->memory.io[REG_POSTFLG >> 1] = 1;
218 int currentCycles = 0;
219 ARM_WRITE_PC;
220 }
221}
222
223static void GBAProcessEvents(struct ARMCore* cpu) {
224 struct GBA* gba = (struct GBA*) cpu->master;
225
226 gba->bus = cpu->prefetch[1];
227 if (cpu->executionMode == MODE_THUMB) {
228 gba->bus |= cpu->prefetch[1] << 16;
229 }
230
231 if (gba->springIRQ && !cpu->cpsr.i) {
232 ARMRaiseIRQ(cpu);
233 gba->springIRQ = 0;
234 }
235
236 int32_t nextEvent = cpu->nextEvent;
237 while (cpu->cycles >= nextEvent) {
238 int32_t cycles = cpu->cycles;
239
240 cpu->cycles = 0;
241 cpu->nextEvent = INT_MAX;
242
243#ifndef NDEBUG
244 if (cycles < 0) {
245 mLOG(GBA, FATAL, "Negative cycles passed: %i", cycles);
246 }
247#endif
248 nextEvent = cycles;
249 do {
250 nextEvent = mTimingTick(&gba->timing, nextEvent);
251 } while (gba->cpuBlocked);
252
253 cpu->nextEvent = nextEvent;
254
255 if (gba->earlyExit) {
256 gba->earlyExit = false;
257 break;
258 }
259 if (cpu->halted) {
260 cpu->cycles = nextEvent;
261 if (!gba->memory.io[REG_IME >> 1] || !gba->memory.io[REG_IE >> 1]) {
262 break;
263 }
264 }
265#ifndef NDEBUG
266 else if (nextEvent < 0) {
267 mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
268 }
269#endif
270 }
271}
272
273#ifdef USE_DEBUGGERS
274void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {
275 gba->debugger = (struct ARMDebugger*) debugger->platform;
276 gba->debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
277 gba->debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
278 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = &debugger->d;
279 ARMHotplugAttach(gba->cpu, CPU_COMPONENT_DEBUGGER);
280}
281
282void GBADetachDebugger(struct GBA* gba) {
283 if (gba->debugger) {
284 ARMHotplugDetach(gba->cpu, CPU_COMPONENT_DEBUGGER);
285 }
286 gba->cpu->components[CPU_COMPONENT_DEBUGGER] = NULL;
287 gba->debugger = NULL;
288}
289#endif
290
291bool GBALoadMB(struct GBA* gba, struct VFile* vf) {
292 GBAUnloadROM(gba);
293 gba->romVf = vf;
294 gba->pristineRomSize = vf->size(vf);
295 vf->seek(vf, 0, SEEK_SET);
296 if (gba->pristineRomSize > SIZE_WORKING_RAM) {
297 gba->pristineRomSize = SIZE_WORKING_RAM;
298 }
299 gba->isPristine = true;
300#ifdef _3DS
301 if (gba->pristineRomSize <= romBufferSize) {
302 gba->memory.wram = romBuffer;
303 vf->read(vf, romBuffer, gba->pristineRomSize);
304 }
305#else
306 gba->memory.wram = vf->map(vf, gba->pristineRomSize, MAP_READ);
307#endif
308 if (!gba->memory.wram) {
309 mLOG(GBA, WARN, "Couldn't map ROM");
310 return false;
311 }
312 gba->yankedRomSize = 0;
313 gba->memory.romSize = 0;
314 gba->memory.romMask = 0;
315 gba->romCrc32 = doCrc32(gba->memory.wram, gba->pristineRomSize);
316 return true;
317}
318
319bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
320 if (!vf) {
321 return false;
322 }
323 GBAUnloadROM(gba);
324 gba->romVf = vf;
325 gba->pristineRomSize = vf->size(vf);
326 vf->seek(vf, 0, SEEK_SET);
327 if (gba->pristineRomSize > SIZE_CART0) {
328 gba->pristineRomSize = SIZE_CART0;
329 }
330 gba->isPristine = true;
331#ifdef _3DS
332 if (gba->pristineRomSize <= romBufferSize) {
333 gba->memory.rom = romBuffer;
334 vf->read(vf, romBuffer, gba->pristineRomSize);
335 }
336#else
337 gba->memory.rom = vf->map(vf, gba->pristineRomSize, MAP_READ);
338#endif
339 if (!gba->memory.rom) {
340 mLOG(GBA, WARN, "Couldn't map ROM");
341 return false;
342 }
343 gba->yankedRomSize = 0;
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 void* newRom = anonymousMemoryMap(SIZE_CART0);
397 if (!patch->applyPatch(patch, gba->memory.rom, gba->pristineRomSize, newRom, patchedSize)) {
398 mappedMemoryFree(newRom, SIZE_CART0);
399 return;
400 }
401 if (gba->romVf) {
402#ifndef _3DS
403 gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->pristineRomSize);
404#endif
405 gba->romVf->close(gba->romVf);
406 gba->romVf = NULL;
407 }
408 gba->isPristine = false;
409 gba->memory.rom = newRom;
410 gba->memory.hw.gpioBase = &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1];
411 gba->memory.romSize = patchedSize;
412 gba->memory.romMask = SIZE_CART0 - 1;
413 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
414}
415
416void GBAWriteIE(struct GBA* gba, uint16_t value) {
417 if (value & (1 << IRQ_KEYPAD)) {
418 mLOG(GBA, STUB, "Keypad interrupts not implemented");
419 }
420
421 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
422 ARMRaiseIRQ(gba->cpu);
423 }
424}
425
426void GBAWriteIME(struct GBA* gba, uint16_t value) {
427 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
428 ARMRaiseIRQ(gba->cpu);
429 }
430}
431
432void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
433 gba->memory.io[REG_IF >> 1] |= 1 << irq;
434
435 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
436 gba->cpu->halted = 0;
437 if (gba->memory.io[REG_IME >> 1]) {
438 ARMRaiseIRQ(gba->cpu);
439 }
440 }
441}
442
443void GBATestIRQ(struct ARMCore* cpu) {
444 struct GBA* gba = (struct GBA*) cpu->master;
445 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
446 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
447 gba->cpu->nextEvent = gba->cpu->cycles;
448 }
449}
450
451void GBAHalt(struct GBA* gba) {
452 gba->cpu->nextEvent = gba->cpu->cycles;
453 gba->cpu->halted = 1;
454}
455
456void GBAStop(struct GBA* gba) {
457 size_t c;
458 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
459 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
460 if (callbacks->sleep) {
461 callbacks->sleep(callbacks->context);
462 }
463 }
464 gba->cpu->nextEvent = gba->cpu->cycles;
465}
466
467void GBADebug(struct GBA* gba, uint16_t flags) {
468 gba->debugFlags = flags;
469 if (GBADebugFlagsIsSend(gba->debugFlags)) {
470 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
471 level &= 0x1F;
472 char oolBuf[0x101];
473 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
474 oolBuf[0x100] = '\0';
475 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
476 }
477 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
478}
479
480bool GBAIsROM(struct VFile* vf) {
481 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
482 return false;
483 }
484 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
485 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
486 return false;
487 }
488 if (GBAIsBIOS(vf)) {
489 return false;
490 }
491 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
492}
493
494bool GBAIsMB(struct VFile* vf) {
495 if (!GBAIsROM(vf)) {
496 return false;
497 }
498 if (vf->size(vf) > SIZE_WORKING_RAM) {
499 return false;
500 }
501 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
502 return false;
503 }
504 uint32_t signature;
505 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
506 return false;
507 }
508 uint32_t opcode;
509 LOAD_32(opcode, 0, &signature);
510 struct ARMInstructionInfo info;
511 ARMDecodeARM(opcode, &info);
512 if (info.branchType != ARM_BRANCH) {
513 return false;
514 }
515 if (info.op1.immediate <= 0) {
516 return false;
517 } else if (info.op1.immediate == 28) {
518 // Ancient toolchain that is known to throw MB detection for a loop
519 return false;
520 } else if (info.op1.immediate != 24) {
521 return true;
522 }
523 // Found a libgba-linked cart...these are a bit harder to detect.
524 return false;
525}
526
527bool GBAIsBIOS(struct VFile* vf) {
528 if (vf->seek(vf, 0, SEEK_SET) < 0) {
529 return false;
530 }
531 uint8_t interruptTable[7 * 4];
532 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
533 return false;
534 }
535 int i;
536 for (i = 0; i < 7; ++i) {
537 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
538 return false;
539 }
540 }
541 return true;
542}
543
544void GBAGetGameCode(const struct GBA* gba, char* out) {
545 memset(out, 0, 8);
546 if (!gba->memory.rom) {
547 return;
548 }
549
550 memcpy(out, "AGB-", 4);
551 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
552}
553
554void GBAGetGameTitle(const struct GBA* gba, char* out) {
555 if (gba->memory.rom) {
556 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
557 return;
558 }
559 if (gba->isPristine && gba->memory.wram) {
560 memcpy(out, &((struct GBACartridge*) gba->memory.wram)->title, 12);
561 return;
562 }
563 strncpy(out, "(BIOS)", 12);
564}
565
566void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
567 struct GBA* gba = (struct GBA*) cpu->master;
568#ifdef USE_DEBUGGERS
569 if (gba->debugger) {
570 struct mDebuggerEntryInfo info = {
571 .address = _ARMPCAddress(cpu),
572 .opcode = opcode
573 };
574 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
575 }
576#endif
577 // TODO: More sensible category?
578 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
579}
580
581void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
582 struct GBA* gba = (struct GBA*) cpu->master;
583 if (!gba->yankedRomSize) {
584 // TODO: More sensible category?
585 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
586 }
587 if (cpu->executionMode == MODE_THUMB && (opcode & 0xFFC0) == 0xE800) {
588 mLOG(GBA, DEBUG, "Hit Wii U VC opcode: %08x", opcode);
589 return;
590 }
591#ifdef USE_DEBUGGERS
592 if (gba->debugger) {
593 struct mDebuggerEntryInfo info = {
594 .address = _ARMPCAddress(cpu),
595 .opcode = opcode
596 };
597 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
598 } else
599#endif
600 {
601 ARMRaiseUndefined(cpu);
602 }
603}
604
605void GBABreakpoint(struct ARMCore* cpu, int immediate) {
606 struct GBA* gba = (struct GBA*) cpu->master;
607 if (immediate >= CPU_COMPONENT_MAX) {
608 return;
609 }
610 switch (immediate) {
611#ifdef USE_DEBUGGERS
612 case CPU_COMPONENT_DEBUGGER:
613 if (gba->debugger) {
614 struct mDebuggerEntryInfo info = {
615 .address = _ARMPCAddress(cpu),
616 .breakType = BREAKPOINT_SOFTWARE
617 };
618 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
619 }
620 break;
621#endif
622 case CPU_COMPONENT_CHEAT_DEVICE:
623 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
624 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
625 struct GBACheatHook* hook = 0;
626 size_t i;
627 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
628 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
629 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
630 mCheatRefresh(device, &cheats->d);
631 hook = cheats->hook;
632 }
633 }
634 if (hook) {
635 ARMRunFake(cpu, hook->patchedOpcode);
636 }
637 }
638 break;
639 default:
640 break;
641 }
642}
643
644void GBAFrameStarted(struct GBA* gba) {
645 UNUSED(gba);
646
647 size_t c;
648 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
649 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
650 if (callbacks->videoFrameStarted) {
651 callbacks->videoFrameStarted(callbacks->context);
652 }
653 }
654}
655
656void GBAFrameEnded(struct GBA* gba) {
657 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
658
659 if (gba->rr) {
660 gba->rr->nextFrame(gba->rr);
661 }
662
663 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
664 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
665 size_t i;
666 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
667 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
668 mCheatRefresh(device, &cheats->d);
669 }
670 }
671
672 if (gba->stream && gba->stream->postVideoFrame) {
673 const color_t* pixels;
674 size_t stride;
675 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
676 gba->stream->postVideoFrame(gba->stream, pixels, stride);
677 }
678
679 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
680 GBAHardwarePlayerUpdate(gba);
681 }
682
683 size_t c;
684 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
685 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
686 if (callbacks->videoFrameEnded) {
687 callbacks->videoFrameEnded(callbacks->context);
688 }
689 }
690}
691
692void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
693 size_t immediate;
694 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
695 if (gba->cpu->components[immediate] == component) {
696 break;
697 }
698 }
699 if (immediate == gba->cpu->numComponents) {
700 return;
701 }
702 if (mode == MODE_ARM) {
703 int32_t value;
704 int32_t old;
705 value = 0xE1200070;
706 value |= immediate & 0xF;
707 value |= (immediate & 0xFFF0) << 4;
708 GBAPatch32(gba->cpu, address, value, &old);
709 *opcode = old;
710 } else {
711 int16_t value;
712 int16_t old;
713 value = 0xBE00;
714 value |= immediate & 0xFF;
715 GBAPatch16(gba->cpu, address, value, &old);
716 *opcode = (uint16_t) old;
717 }
718}
719
720void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
721 if (mode == MODE_ARM) {
722 GBAPatch32(gba->cpu, address, opcode, 0);
723 } else {
724 GBAPatch16(gba->cpu, address, opcode, 0);
725 }
726}
727
728static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
729 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
730 return true;
731}
732
733static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
734 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
735 return true;
736}