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) {
479 return false;
480 }
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 if (info.op1.immediate <= 0) {
514 return false;
515 } else if (info.op1.immediate == 28) {
516 // Ancient toolchain that is known to throw MB detection for a loop
517 return false;
518 } else if (info.op1.immediate != 24) {
519 return true;
520 }
521 }
522
523 uint32_t pc = GBA_MB_MAGIC_OFFSET;
524 int i;
525 for (i = 0; i < 80; ++i) {
526 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
527 break;
528 }
529 pc += 4;
530 LOAD_32(opcode, 0, &signature);
531 ARMDecodeARM(opcode, &info);
532 if (info.mnemonic != ARM_MN_LDR) {
533 continue;
534 }
535 if ((info.operandFormat & ARM_OPERAND_MEMORY) && info.memory.baseReg == ARM_PC && info.memory.format & ARM_MEMORY_IMMEDIATE_OFFSET) {
536 uint32_t immediate = info.memory.offset.immediate;
537 if (info.memory.format & ARM_MEMORY_OFFSET_SUBTRACT) {
538 immediate = -immediate;
539 }
540 immediate += pc + 8;
541 if (vf->seek(vf, immediate, SEEK_SET) < 0) {
542 break;
543 }
544 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
545 break;
546 }
547 LOAD_32(immediate, 0, &signature);
548 if (vf->seek(vf, pc, SEEK_SET) < 0) {
549 break;
550 }
551 if ((immediate & ~0x7FF) == BASE_WORKING_RAM) {
552 return true;
553 }
554 }
555 }
556 // Found a libgba-linked cart...these are a bit harder to detect.
557 return false;
558}
559
560bool GBAIsBIOS(struct VFile* vf) {
561 if (vf->seek(vf, 0, SEEK_SET) < 0) {
562 return false;
563 }
564 uint8_t interruptTable[7 * 4];
565 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
566 return false;
567 }
568 int i;
569 for (i = 0; i < 7; ++i) {
570 if (interruptTable[4 * i + 3] != 0xEA || interruptTable[4 * i + 2]) {
571 return false;
572 }
573 }
574 return true;
575}
576
577void GBAGetGameCode(const struct GBA* gba, char* out) {
578 memset(out, 0, 8);
579 if (!gba->memory.rom) {
580 return;
581 }
582
583 memcpy(out, "AGB-", 4);
584 memcpy(&out[4], &((struct GBACartridge*) gba->memory.rom)->id, 4);
585}
586
587void GBAGetGameTitle(const struct GBA* gba, char* out) {
588 if (gba->memory.rom) {
589 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
590 return;
591 }
592 if (gba->isPristine && gba->memory.wram) {
593 memcpy(out, &((struct GBACartridge*) gba->memory.wram)->title, 12);
594 return;
595 }
596 strncpy(out, "(BIOS)", 12);
597}
598
599void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
600 struct GBA* gba = (struct GBA*) cpu->master;
601#ifdef USE_DEBUGGERS
602 if (gba->debugger) {
603 struct mDebuggerEntryInfo info = {
604 .address = _ARMPCAddress(cpu),
605 .type.bp.opcode = opcode
606 };
607 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
608 }
609#endif
610 // TODO: More sensible category?
611 mLOG(GBA, ERROR, "Stub opcode: %08x", opcode);
612}
613
614void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
615 struct GBA* gba = (struct GBA*) cpu->master;
616 if (!gba->yankedRomSize) {
617 // TODO: More sensible category?
618 mLOG(GBA, WARN, "Illegal opcode: %08x", opcode);
619 }
620 if (cpu->executionMode == MODE_THUMB && (opcode & 0xFFC0) == 0xE800) {
621 mLOG(GBA, DEBUG, "Hit Wii U VC opcode: %08x", opcode);
622 return;
623 }
624#ifdef USE_DEBUGGERS
625 if (gba->debugger) {
626 struct mDebuggerEntryInfo info = {
627 .address = _ARMPCAddress(cpu),
628 .type.bp.opcode = opcode
629 };
630 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_ILLEGAL_OP, &info);
631 } else
632#endif
633 {
634 ARMRaiseUndefined(cpu);
635 }
636}
637
638void GBABreakpoint(struct ARMCore* cpu, int immediate) {
639 struct GBA* gba = (struct GBA*) cpu->master;
640 if (immediate >= CPU_COMPONENT_MAX) {
641 return;
642 }
643 switch (immediate) {
644#ifdef USE_DEBUGGERS
645 case CPU_COMPONENT_DEBUGGER:
646 if (gba->debugger) {
647 struct mDebuggerEntryInfo info = {
648 .address = _ARMPCAddress(cpu),
649 .type.bp.breakType = BREAKPOINT_SOFTWARE
650 };
651 mDebuggerEnter(gba->debugger->d.p, DEBUGGER_ENTER_BREAKPOINT, &info);
652 }
653 break;
654#endif
655 case CPU_COMPONENT_CHEAT_DEVICE:
656 if (gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
657 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
658 struct GBACheatHook* hook = 0;
659 size_t i;
660 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
661 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
662 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
663 mCheatRefresh(device, &cheats->d);
664 hook = cheats->hook;
665 }
666 }
667 if (hook) {
668 ARMRunFake(cpu, hook->patchedOpcode);
669 }
670 }
671 break;
672 default:
673 break;
674 }
675}
676
677void GBAFrameStarted(struct GBA* gba) {
678 GBATestKeypadIRQ(gba);
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->videoFrameStarted) {
684 callbacks->videoFrameStarted(callbacks->context);
685 }
686 }
687}
688
689void GBAFrameEnded(struct GBA* gba) {
690 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
691
692 if (gba->rr) {
693 gba->rr->nextFrame(gba->rr);
694 }
695
696 if (gba->cpu->components && gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE]) {
697 struct mCheatDevice* device = (struct mCheatDevice*) gba->cpu->components[CPU_COMPONENT_CHEAT_DEVICE];
698 size_t i;
699 for (i = 0; i < mCheatSetsSize(&device->cheats); ++i) {
700 struct GBACheatSet* cheats = (struct GBACheatSet*) *mCheatSetsGetPointer(&device->cheats, i);
701 mCheatRefresh(device, &cheats->d);
702 }
703 }
704
705 if (gba->stream && gba->stream->postVideoFrame) {
706 const color_t* pixels;
707 size_t stride;
708 gba->video.renderer->getPixels(gba->video.renderer, &stride, (const void**) &pixels);
709 gba->stream->postVideoFrame(gba->stream, pixels, stride);
710 }
711
712 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
713 GBAHardwarePlayerUpdate(gba);
714 }
715
716 size_t c;
717 for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
718 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
719 if (callbacks->videoFrameEnded) {
720 callbacks->videoFrameEnded(callbacks->context);
721 }
722 }
723}
724
725void GBATestKeypadIRQ(struct GBA* gba) {
726 uint16_t keycnt = gba->memory.io[REG_KEYCNT >> 1];
727 if (!(keycnt & 0x4000)) {
728 return;
729 }
730 int isAnd = keycnt & 0x8000;
731 if (!gba->keySource) {
732 // TODO?
733 return;
734 }
735
736 keycnt &= 0x3FF;
737 uint16_t keyInput = *gba->keySource & keycnt;
738
739 if (isAnd && keycnt == keyInput) {
740 GBARaiseIRQ(gba, IRQ_KEYPAD);
741 } else if (!isAnd && keyInput) {
742 GBARaiseIRQ(gba, IRQ_KEYPAD);
743 }
744}
745
746void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
747 size_t immediate;
748 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
749 if (gba->cpu->components[immediate] == component) {
750 break;
751 }
752 }
753 if (immediate == gba->cpu->numComponents) {
754 return;
755 }
756 if (mode == MODE_ARM) {
757 int32_t value;
758 int32_t old;
759 value = 0xE1200070;
760 value |= immediate & 0xF;
761 value |= (immediate & 0xFFF0) << 4;
762 GBAPatch32(gba->cpu, address, value, &old);
763 *opcode = old;
764 } else {
765 int16_t value;
766 int16_t old;
767 value = 0xBE00;
768 value |= immediate & 0xFF;
769 GBAPatch16(gba->cpu, address, value, &old);
770 *opcode = (uint16_t) old;
771 }
772}
773
774void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
775 if (mode == MODE_ARM) {
776 GBAPatch32(gba->cpu, address, opcode, 0);
777 } else {
778 GBAPatch16(gba->cpu, address, opcode, 0);
779 }
780}
781
782static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
783 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d.p->d, address, mode, opcode);
784 return true;
785}
786
787static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
788 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
789 return true;
790}