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 gba->memory.wram = anonymousMemoryMap(SIZE_WORKING_RAM);
301 memset(gba->memory.wram, 0, SIZE_WORKING_RAM);
302 vf->read(vf, gba->memory.wram, gba->pristineRomSize);
303 if (!gba->memory.wram) {
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->memory.wram, gba->pristineRomSize);
311 if (gba->cpu && gba->memory.activeRegion == REGION_WORKING_RAM) {
312 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
313 }
314 return true;
315}
316
317bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
318 if (!vf) {
319 return false;
320 }
321 GBAUnloadROM(gba);
322 gba->romVf = vf;
323 gba->pristineRomSize = vf->size(vf);
324 vf->seek(vf, 0, SEEK_SET);
325 if (gba->pristineRomSize > SIZE_CART0) {
326 gba->pristineRomSize = SIZE_CART0;
327 }
328 gba->isPristine = true;
329#ifdef _3DS
330 if (gba->pristineRomSize <= romBufferSize) {
331 gba->memory.rom = romBuffer;
332 vf->read(vf, romBuffer, gba->pristineRomSize);
333 }
334#else
335 gba->memory.rom = vf->map(vf, gba->pristineRomSize, MAP_READ);
336#endif
337 if (!gba->memory.rom) {
338 mLOG(GBA, WARN, "Couldn't map ROM");
339 return false;
340 }
341 gba->yankedRomSize = 0;
342 gba->memory.romSize = gba->pristineRomSize;
343 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
344 gba->memory.mirroring = false;
345 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
346 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
347 GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
348 if (gba->cpu && gba->memory.activeRegion >= REGION_CART0) {
349 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
350 }
351 // TODO: error check
352 return true;
353}
354
355bool GBALoadSave(struct GBA* gba, struct VFile* sav) {
356 GBASavedataInit(&gba->memory.savedata, sav);
357 return true;
358}
359
360void GBAYankROM(struct GBA* gba) {
361 gba->yankedRomSize = gba->memory.romSize;
362 gba->memory.romSize = 0;
363 gba->memory.romMask = 0;
364 GBARaiseIRQ(gba, IRQ_GAMEPAK);
365}
366
367void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
368 gba->biosVf = vf;
369 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
370 if (!bios) {
371 mLOG(GBA, WARN, "Couldn't map BIOS");
372 return;
373 }
374 gba->memory.bios = bios;
375 gba->memory.fullBios = 1;
376 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
377 mLOG(GBA, DEBUG, "BIOS Checksum: 0x%X", checksum);
378 if (checksum == GBA_BIOS_CHECKSUM) {
379 mLOG(GBA, INFO, "Official GBA BIOS detected");
380 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
381 mLOG(GBA, INFO, "Official GBA (DS) BIOS detected");
382 } else {
383 mLOG(GBA, WARN, "BIOS checksum incorrect");
384 }
385 gba->biosChecksum = checksum;
386 if (gba->memory.activeRegion == REGION_BIOS) {
387 gba->cpu->memory.activeRegion = gba->memory.bios;
388 }
389 // TODO: error check
390}
391
392void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
393 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
394 if (!patchedSize || patchedSize > SIZE_CART0) {
395 return;
396 }
397 void* newRom = anonymousMemoryMap(SIZE_CART0);
398 if (!patch->applyPatch(patch, gba->memory.rom, gba->pristineRomSize, newRom, patchedSize)) {
399 mappedMemoryFree(newRom, SIZE_CART0);
400 return;
401 }
402 if (gba->romVf) {
403#ifndef _3DS
404 gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->pristineRomSize);
405#endif
406 gba->romVf->close(gba->romVf);
407 gba->romVf = NULL;
408 }
409 gba->isPristine = false;
410 gba->memory.rom = newRom;
411 gba->memory.hw.gpioBase = &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1];
412 gba->memory.romSize = patchedSize;
413 gba->memory.romMask = SIZE_CART0 - 1;
414 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
415}
416
417void GBAWriteIE(struct GBA* gba, uint16_t value) {
418 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
419 ARMRaiseIRQ(gba->cpu);
420 }
421}
422
423void GBAWriteIME(struct GBA* gba, uint16_t value) {
424 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
425 ARMRaiseIRQ(gba->cpu);
426 }
427}
428
429void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
430 gba->memory.io[REG_IF >> 1] |= 1 << irq;
431
432 if (gba->memory.io[REG_IE >> 1] & 1 << irq) {
433 gba->cpu->halted = 0;
434 if (gba->memory.io[REG_IME >> 1]) {
435 ARMRaiseIRQ(gba->cpu);
436 }
437 }
438}
439
440void GBATestIRQ(struct ARMCore* cpu) {
441 struct GBA* gba = (struct GBA*) cpu->master;
442 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
443 gba->springIRQ = gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1];
444 gba->cpu->nextEvent = gba->cpu->cycles;
445 }
446}
447
448void GBAHalt(struct GBA* gba) {
449 gba->cpu->nextEvent = gba->cpu->cycles;
450 gba->cpu->halted = 1;
451}
452
453void GBAStop(struct GBA* gba) {
454 size_t c;
455 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
456 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
457 if (callbacks->sleep) {
458 callbacks->sleep(callbacks->context);
459 }
460 }
461 gba->cpu->nextEvent = gba->cpu->cycles;
462}
463
464void GBADebug(struct GBA* gba, uint16_t flags) {
465 gba->debugFlags = flags;
466 if (GBADebugFlagsIsSend(gba->debugFlags)) {
467 int level = 1 << GBADebugFlagsGetLevel(gba->debugFlags);
468 level &= 0x1F;
469 char oolBuf[0x101];
470 strncpy(oolBuf, gba->debugString, sizeof(gba->debugString));
471 oolBuf[0x100] = '\0';
472 mLog(_mLOG_CAT_GBA_DEBUG(), level, "%s", oolBuf);
473 }
474 gba->debugFlags = GBADebugFlagsClearSend(gba->debugFlags);
475}
476
477bool GBAIsROM(struct VFile* vf) {
478 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
479 return false;
480 }
481 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
482 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
483 return false;
484 }
485 if (GBAIsBIOS(vf)) {
486 return false;
487 }
488 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
489}
490
491bool GBAIsMB(struct VFile* vf) {
492 if (!GBAIsROM(vf)) {
493 return false;
494 }
495 if (vf->size(vf) > SIZE_WORKING_RAM) {
496 return false;
497 }
498 if (vf->seek(vf, GBA_MB_MAGIC_OFFSET, SEEK_SET) < 0) {
499 return false;
500 }
501 uint32_t signature;
502 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
503 return false;
504 }
505 uint32_t opcode;
506 LOAD_32(opcode, 0, &signature);
507 struct ARMInstructionInfo info;
508 ARMDecodeARM(opcode, &info);
509 if (info.branchType != ARM_BRANCH) {
510 return false;
511 }
512 if (info.op1.immediate <= 0) {
513 return false;
514 } else if (info.op1.immediate == 28) {
515 // Ancient toolchain that is known to throw MB detection for a loop
516 return false;
517 } else if (info.op1.immediate != 24) {
518 return true;
519 }
520 // Found a libgba-linked cart...these are a bit harder to detect.
521 return false;
522}
523
524bool GBAIsBIOS(struct VFile* vf) {
525 if (vf->seek(vf, 0, SEEK_SET) < 0) {
526 return false;
527 }
528 uint8_t interruptTable[7 * 4];
529 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
530 return false;
531 }
532 int i;
533 for (i = 0; i < 7; ++i) {
534 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
535 return false;
536 }
537 }
538 return true;
539}
540
541void GBAGetGameCode(const struct GBA* gba, char* out) {
542 memset(out, 0, 8);
543 if (!gba->memory.rom) {
544 return;
545 }
546
547 memcpy(out, "AGB-", 4);
548 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
549}
550
551void GBAGetGameTitle(const struct GBA* gba, char* out) {
552 if (gba->memory.rom) {
553 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
554 return;
555 }
556 if (gba->isPristine && gba->memory.wram) {
557 memcpy(out, &((struct GBACartridge*) gba->memory.wram)->title, 12);
558 return;
559 }
560 strncpy(out, "(BIOS)", 12);
561}
562
563void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
564 struct GBA* gba = (struct GBA*) cpu->master;
565#ifdef USE_DEBUGGERS
566 if (gba->debugger) {
567 struct mDebuggerEntryInfo info = {
568 .address = _ARMPCAddress(cpu),
569 .opcode = opcode
570 };
571 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
572 }
573#endif
574 // TODO: More sensible category?
575 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
576}
577
578void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
579 struct GBA* gba = (struct GBA*) cpu->master;
580 if (!gba->yankedRomSize) {
581 // TODO: More sensible category?
582 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
583 }
584 if (cpu->executionMode == MODE_THUMB && (opcode & 0xFFC0) == 0xE800) {
585 mLOG(GBA, DEBUG, "Hit Wii U VC opcode: %08x", opcode);
586 return;
587 }
588#ifdef USE_DEBUGGERS
589 if (gba->debugger) {
590 struct mDebuggerEntryInfo info = {
591 .address = _ARMPCAddress(cpu),
592 .opcode = opcode
593 };
594 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
595 } else
596#endif
597 {
598 ARMRaiseUndefined(cpu);
599 }
600}
601
602void GBABreakpoint(struct ARMCore* cpu, int immediate) {
603 struct GBA* gba = (struct GBA*) cpu->master;
604 if (immediate >= CPU_COMPONENT_MAX) {
605 return;
606 }
607 switch (immediate) {
608#ifdef USE_DEBUGGERS
609 case CPU_COMPONENT_DEBUGGER:
610 if (gba->debugger) {
611 struct mDebuggerEntryInfo info = {
612 .address = _ARMPCAddress(cpu),
613 .breakType = BREAKPOINT_SOFTWARE
614 };
615 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
616 }
617 break;
618#endif
619 case CPU_COMPONENT_CHEAT_DEVICE:
620 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
621 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
622 struct GBACheatHook* hook = 0;
623 size_t i;
624 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
625 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
626 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
627 mCheatRefresh(device, &cheats->d);
628 hook = cheats->hook;
629 }
630 }
631 if (hook) {
632 ARMRunFake(cpu, hook->patchedOpcode);
633 }
634 }
635 break;
636 default:
637 break;
638 }
639}
640
641void GBAFrameStarted(struct GBA* gba) {
642 GBATestKeypadIRQ(gba);
643
644 size_t c;
645 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
646 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
647 if (callbacks->videoFrameStarted) {
648 callbacks->videoFrameStarted(callbacks->context);
649 }
650 }
651}
652
653void GBAFrameEnded(struct GBA* gba) {
654 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
655
656 if (gba->rr) {
657 gba->rr->nextFrame(gba->rr);
658 }
659
660 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
661 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
662 size_t i;
663 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
664 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
665 mCheatRefresh(device, &cheats->d);
666 }
667 }
668
669 if (gba->stream && gba->stream->postVideoFrame) {
670 const color_t* pixels;
671 size_t stride;
672 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
673 gba->stream->postVideoFrame(gba->stream, pixels, stride);
674 }
675
676 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
677 GBAHardwarePlayerUpdate(gba);
678 }
679
680 size_t c;
681 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
682 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
683 if (callbacks->videoFrameEnded) {
684 callbacks->videoFrameEnded(callbacks->context);
685 }
686 }
687}
688
689void GBATestKeypadIRQ(struct GBA* gba) {
690 uint16_t keycnt = gba->memory.io[REG_KEYCNT >> 1];
691 if (!(keycnt & 0x4000)) {
692 return;
693 }
694 int isAnd = keycnt & 0x8000;
695 uint16_t keyInput;
696
697 if (!gba->keySource) {
698 // TODO?
699 return;
700 }
701
702 keycnt &= 0x3FF;
703 keyInput = *gba->keySource;
704
705 if (isAnd && keycnt == keyInput) {
706 GBARaiseIRQ(gba, IRQ_KEYPAD);
707 } else if (!isAnd && keycnt & keyInput) {
708 GBARaiseIRQ(gba, IRQ_KEYPAD);
709 }
710}
711
712void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
713 size_t immediate;
714 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
715 if (gba->cpu->components[immediate] == component) {
716 break;
717 }
718 }
719 if (immediate == gba->cpu->numComponents) {
720 return;
721 }
722 if (mode == MODE_ARM) {
723 int32_t value;
724 int32_t old;
725 value = 0xE1200070;
726 value |= immediate & 0xF;
727 value |= (immediate & 0xFFF0) << 4;
728 GBAPatch32(gba->cpu, address, value, &old);
729 *opcode = old;
730 } else {
731 int16_t value;
732 int16_t old;
733 value = 0xBE00;
734 value |= immediate & 0xFF;
735 GBAPatch16(gba->cpu, address, value, &old);
736 *opcode = (uint16_t) old;
737 }
738}
739
740void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
741 if (mode == MODE_ARM) {
742 GBAPatch32(gba->cpu, address, opcode, 0);
743 } else {
744 GBAPatch16(gba->cpu, address, opcode, 0);
745 }
746}
747
748static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
749 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
750 return true;
751}
752
753static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
754 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
755 return true;
756}