src/gba/gba.c (view raw)
1#include "gba.h"
2
3#include "gba-bios.h"
4#include "gba-io.h"
5#include "gba-sio.h"
6#include "gba-thread.h"
7
8#include "util/memory.h"
9#include "util/patch.h"
10
11#include <sys/stat.h>
12
13const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
14const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
15
16enum {
17 SP_BASE_SYSTEM = 0x03FFFF00,
18 SP_BASE_IRQ = 0x03FFFFA0,
19 SP_BASE_SUPERVISOR = 0x03FFFFE0
20};
21
22struct GBACartridgeOverride {
23 const char id[4];
24 enum SavedataType type;
25 int gpio;
26};
27
28static const struct GBACartridgeOverride _overrides[] = {
29 // Boktai: The Sun is in Your Hand
30 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
31 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
32
33 // Boktai 2: Solar Boy Django
34 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
35 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
36
37 // Drill Dozer
38 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE },
39 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE },
40
41 // Pokemon Ruby
42 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC },
43 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC },
44 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC },
45 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC },
46 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC },
47 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC },
48 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC },
49
50 // Pokemon Sapphire
51 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC },
52 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC },
53 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC },
54 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC },
55 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC },
56 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC },
57 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC },
58
59 // Pokemon Emerald
60 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC },
61 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC },
62 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC },
63 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC },
64 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC },
65 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC },
66 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC },
67
68 // Pokemon FireRed
69 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE },
70 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE },
71 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE },
72
73 // Pokemon LeafGreen
74 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE },
75 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE },
76 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE },
77
78 // RockMan EXE 4.5 - Real Operation
79 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC },
80
81 // Super Mario Advance 4
82 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE },
83 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE },
84 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE },
85
86 // Wario Ware Twisted
87 { "RWZJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
88 { "RWZE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
89 { "RWZP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
90
91 { { 0, 0, 0, 0 }, 0, 0 }
92};
93
94static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
95static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
96static void GBAProcessEvents(struct ARMCore* cpu);
97static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
98static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
99static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
100
101static void _checkOverrides(struct GBA* gba, uint32_t code);
102
103void GBACreate(struct GBA* gba) {
104 gba->d.id = GBA_COMPONENT_MAGIC;
105 gba->d.init = GBAInit;
106 gba->d.deinit = 0;
107}
108
109static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
110 struct GBA* gba = (struct GBA*) component;
111 gba->cpu = cpu;
112 gba->debugger = 0;
113 gba->savefile = 0;
114
115 GBAInterruptHandlerInit(&cpu->irqh);
116 GBAMemoryInit(gba);
117
118 gba->video.p = gba;
119 GBAVideoInit(&gba->video);
120
121 gba->audio.p = gba;
122 GBAAudioInit(&gba->audio);
123
124 GBAIOInit(gba);
125
126 gba->sio.p = gba;
127 GBASIOInit(&gba->sio);
128
129 gba->timersEnabled = 0;
130 memset(gba->timers, 0, sizeof(gba->timers));
131
132 gba->springIRQ = 0;
133 gba->keySource = 0;
134 gba->rotationSource = 0;
135 gba->rumble = 0;
136
137 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
138
139 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
140}
141
142void GBADestroy(struct GBA* gba) {
143 if (gba->pristineRom == gba->memory.rom) {
144 gba->memory.rom = 0;
145 }
146 mappedMemoryFree(gba->pristineRom, gba->pristineRomSize);
147 GBAMemoryDeinit(gba);
148 GBAVideoDeinit(&gba->video);
149 GBAAudioDeinit(&gba->audio);
150}
151
152void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
153 irqh->reset = GBAReset;
154 irqh->processEvents = GBAProcessEvents;
155 irqh->swi16 = GBASwi16;
156 irqh->swi32 = GBASwi32;
157 irqh->hitIllegal = GBAIllegal;
158 irqh->readCPSR = GBATestIRQ;
159 irqh->hitStub = GBAHitStub;
160}
161
162void GBAReset(struct ARMCore* cpu) {
163 ARMSetPrivilegeMode(cpu, MODE_IRQ);
164 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
165 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
166 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
167 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
168 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
169}
170
171static void GBAProcessEvents(struct ARMCore* cpu) {
172 do {
173 struct GBA* gba = (struct GBA*) cpu->master;
174 int32_t cycles = cpu->cycles;
175 int32_t nextEvent = INT_MAX;
176 int32_t testEvent;
177
178 if (gba->springIRQ) {
179 ARMRaiseIRQ(cpu);
180 gba->springIRQ = 0;
181 }
182
183 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
184 if (testEvent < nextEvent) {
185 nextEvent = testEvent;
186 }
187
188 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
189 if (testEvent < nextEvent) {
190 nextEvent = testEvent;
191 }
192
193 testEvent = GBATimersProcessEvents(gba, cycles);
194 if (testEvent < nextEvent) {
195 nextEvent = testEvent;
196 }
197
198 testEvent = GBAMemoryRunDMAs(gba, cycles);
199 if (testEvent < nextEvent) {
200 nextEvent = testEvent;
201 }
202
203 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
204 if (testEvent < nextEvent) {
205 nextEvent = testEvent;
206 }
207
208 cpu->cycles -= cycles;
209 cpu->nextEvent = nextEvent;
210
211 if (cpu->halted) {
212 cpu->cycles = cpu->nextEvent;
213 }
214 } while (cpu->cycles >= cpu->nextEvent);
215}
216
217static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
218 int32_t nextEvent = INT_MAX;
219 if (gba->timersEnabled) {
220 struct GBATimer* timer;
221 struct GBATimer* nextTimer;
222
223 timer = &gba->timers[0];
224 if (timer->enable) {
225 timer->nextEvent -= cycles;
226 timer->lastEvent -= cycles;
227 if (timer->nextEvent <= 0) {
228 timer->lastEvent = timer->nextEvent;
229 timer->nextEvent += timer->overflowInterval;
230 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
231 timer->oldReload = timer->reload;
232
233 if (timer->doIrq) {
234 GBARaiseIRQ(gba, IRQ_TIMER0);
235 }
236
237 if (gba->audio.enable) {
238 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
239 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
240 }
241
242 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
243 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
244 }
245 }
246
247 nextTimer = &gba->timers[1];
248 if (nextTimer->countUp) {
249 ++gba->memory.io[REG_TM1CNT_LO >> 1];
250 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
251 nextTimer->nextEvent = 0;
252 }
253 }
254 }
255 nextEvent = timer->nextEvent;
256 }
257
258 timer = &gba->timers[1];
259 if (timer->enable) {
260 timer->nextEvent -= cycles;
261 timer->lastEvent -= cycles;
262 if (timer->nextEvent <= 0) {
263 timer->lastEvent = timer->nextEvent;
264 timer->nextEvent += timer->overflowInterval;
265 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
266 timer->oldReload = timer->reload;
267
268 if (timer->doIrq) {
269 GBARaiseIRQ(gba, IRQ_TIMER1);
270 }
271
272 if (gba->audio.enable) {
273 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
274 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
275 }
276
277 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
278 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
279 }
280 }
281
282 if (timer->countUp) {
283 timer->nextEvent = INT_MAX;
284 }
285
286 nextTimer = &gba->timers[2];
287 if (nextTimer->countUp) {
288 ++gba->memory.io[REG_TM2CNT_LO >> 1];
289 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
290 nextTimer->nextEvent = 0;
291 }
292 }
293 }
294 if (timer->nextEvent < nextEvent) {
295 nextEvent = timer->nextEvent;
296 }
297 }
298
299 timer = &gba->timers[2];
300 if (timer->enable) {
301 timer->nextEvent -= cycles;
302 timer->lastEvent -= cycles;
303 nextEvent = timer->nextEvent;
304 if (timer->nextEvent <= 0) {
305 timer->lastEvent = timer->nextEvent;
306 timer->nextEvent += timer->overflowInterval;
307 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
308 timer->oldReload = timer->reload;
309
310 if (timer->doIrq) {
311 GBARaiseIRQ(gba, IRQ_TIMER2);
312 }
313
314 if (timer->countUp) {
315 timer->nextEvent = INT_MAX;
316 }
317
318 nextTimer = &gba->timers[3];
319 if (nextTimer->countUp) {
320 ++gba->memory.io[REG_TM3CNT_LO >> 1];
321 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
322 nextTimer->nextEvent = 0;
323 }
324 }
325 }
326 if (timer->nextEvent < nextEvent) {
327 nextEvent = timer->nextEvent;
328 }
329 }
330
331 timer = &gba->timers[3];
332 if (timer->enable) {
333 timer->nextEvent -= cycles;
334 timer->lastEvent -= cycles;
335 nextEvent = timer->nextEvent;
336 if (timer->nextEvent <= 0) {
337 timer->lastEvent = timer->nextEvent;
338 timer->nextEvent += timer->overflowInterval;
339 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
340 timer->oldReload = timer->reload;
341
342 if (timer->doIrq) {
343 GBARaiseIRQ(gba, IRQ_TIMER3);
344 }
345
346 if (timer->countUp) {
347 timer->nextEvent = INT_MAX;
348 }
349 }
350 if (timer->nextEvent < nextEvent) {
351 nextEvent = timer->nextEvent;
352 }
353 }
354 }
355 return nextEvent;
356}
357
358void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
359 gba->debugger = debugger;
360}
361
362void GBADetachDebugger(struct GBA* gba) {
363 gba->debugger = 0;
364}
365
366void GBALoadROM(struct GBA* gba, int fd, const char* fname) {
367 struct stat info;
368 gba->pristineRom = fileMemoryMap(fd, SIZE_CART0, MEMORY_READ);
369 gba->memory.rom = gba->pristineRom;
370 gba->activeFile = fname;
371 fstat(fd, &info);
372 gba->pristineRomSize = info.st_size;
373 gba->memory.romSize = gba->pristineRomSize;
374 if (gba->savefile) {
375 GBASavedataInit(&gba->memory.savedata, gba->savefile);
376 }
377 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
378 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
379 // TODO: error check
380}
381
382void GBALoadBIOS(struct GBA* gba, int fd) {
383 gba->memory.bios = fileMemoryMap(fd, SIZE_BIOS, MEMORY_READ);
384 gba->memory.fullBios = 1;
385 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
386 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
387 if (checksum == GBA_BIOS_CHECKSUM) {
388 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
389 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
390 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
391 } else {
392 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
393 }
394 gba->biosChecksum = checksum;
395 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
396 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
397 }
398 // TODO: error check
399}
400
401void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
402 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
403 if (!patchedSize) {
404 return;
405 }
406 gba->memory.rom = anonymousMemoryMap(patchedSize);
407 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
408 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
409 mappedMemoryFree(gba->memory.rom, patchedSize);
410 gba->memory.rom = gba->pristineRom;
411 return;
412 }
413 gba->memory.romSize = patchedSize;
414}
415
416void GBATimerUpdateRegister(struct GBA* gba, int timer) {
417 struct GBATimer* currentTimer = &gba->timers[timer];
418 if (currentTimer->enable && !currentTimer->countUp) {
419 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
420 }
421}
422
423void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
424 gba->timers[timer].reload = reload;
425}
426
427void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
428 struct GBATimer* currentTimer = &gba->timers[timer];
429 GBATimerUpdateRegister(gba, timer);
430
431 int oldPrescale = currentTimer->prescaleBits;
432 switch (control & 0x0003) {
433 case 0x0000:
434 currentTimer->prescaleBits = 0;
435 break;
436 case 0x0001:
437 currentTimer->prescaleBits = 6;
438 break;
439 case 0x0002:
440 currentTimer->prescaleBits = 8;
441 break;
442 case 0x0003:
443 currentTimer->prescaleBits = 10;
444 break;
445 }
446 currentTimer->countUp = !!(control & 0x0004);
447 currentTimer->doIrq = !!(control & 0x0040);
448 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
449 int wasEnabled = currentTimer->enable;
450 currentTimer->enable = !!(control & 0x0080);
451 if (!wasEnabled && currentTimer->enable) {
452 if (!currentTimer->countUp) {
453 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
454 } else {
455 currentTimer->nextEvent = INT_MAX;
456 }
457 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
458 currentTimer->oldReload = currentTimer->reload;
459 currentTimer->lastEvent = 0;
460 gba->timersEnabled |= 1 << timer;
461 } else if (wasEnabled && !currentTimer->enable) {
462 if (!currentTimer->countUp) {
463 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
464 }
465 gba->timersEnabled &= ~(1 << timer);
466 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
467 // FIXME: this might be before present
468 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
469 }
470
471 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
472 gba->cpu->nextEvent = currentTimer->nextEvent;
473 }
474};
475
476void GBAWriteIE(struct GBA* gba, uint16_t value) {
477 if (value & (1 << IRQ_KEYPAD)) {
478 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
479 }
480
481 if (value & (1 << IRQ_GAMEPAK)) {
482 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
483 }
484
485 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
486 ARMRaiseIRQ(gba->cpu);
487 }
488}
489
490void GBAWriteIME(struct GBA* gba, uint16_t value) {
491 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
492 ARMRaiseIRQ(gba->cpu);
493 }
494}
495
496void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
497 gba->memory.io[REG_IF >> 1] |= 1 << irq;
498 gba->cpu->halted = 0;
499
500 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
501 ARMRaiseIRQ(gba->cpu);
502 }
503}
504
505void GBATestIRQ(struct ARMCore* cpu) {
506 struct GBA* gba = (struct GBA*) cpu->master;
507 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
508 gba->springIRQ = 1;
509 gba->cpu->nextEvent = 0;
510 }
511}
512
513void GBAHalt(struct GBA* gba) {
514 gba->cpu->nextEvent = 0;
515 gba->cpu->halted = 1;
516}
517
518static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
519 if (!gba) {
520 struct GBAThread* threadContext = GBAThreadGetContext();
521 if (threadContext) {
522 gba = threadContext->gba;
523 }
524 }
525
526 if (gba && gba->logHandler) {
527 gba->logHandler(gba, level, format, args);
528 return;
529 }
530
531 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
532 return;
533 }
534
535 vprintf(format, args);
536 printf("\n");
537
538 if (level == GBA_LOG_FATAL) {
539 abort();
540 }
541}
542
543void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
544 va_list args;
545 va_start(args, format);
546 _GBAVLog(gba, level, format, args);
547 va_end(args);
548}
549
550void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
551 struct GBA* gba = 0;
552 if (debugger->cpu) {
553 gba = (struct GBA*) debugger->cpu->master;
554 }
555
556 enum GBALogLevel gbaLevel;
557 switch (level) {
558 case DEBUGGER_LOG_DEBUG:
559 gbaLevel = GBA_LOG_DEBUG;
560 break;
561 case DEBUGGER_LOG_INFO:
562 gbaLevel = GBA_LOG_INFO;
563 break;
564 case DEBUGGER_LOG_WARN:
565 gbaLevel = GBA_LOG_WARN;
566 break;
567 case DEBUGGER_LOG_ERROR:
568 gbaLevel = GBA_LOG_ERROR;
569 break;
570 }
571 va_list args;
572 va_start(args, format);
573 _GBAVLog(gba, gbaLevel, format, args);
574 va_end(args);
575}
576
577
578void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
579 struct GBA* gba = (struct GBA*) cpu->master;
580 enum GBALogLevel level = GBA_LOG_FATAL;
581 if (gba->debugger) {
582 level = GBA_LOG_STUB;
583 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
584 }
585 GBALog(gba, level, "Stub opcode: %08x", opcode);
586}
587
588void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
589 struct GBA* gba = (struct GBA*) cpu->master;
590 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
591 if (gba->debugger) {
592 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
593 }
594}
595
596void _checkOverrides(struct GBA* gba, uint32_t id) {
597 int i;
598 for (i = 0; _overrides[i].id[0]; ++i) {
599 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
600 if (*overrideId == id) {
601 switch (_overrides[i].type) {
602 case SAVEDATA_FLASH512:
603 case SAVEDATA_FLASH1M:
604 gba->memory.savedata.type = _overrides[i].type;
605 GBASavedataInitFlash(&gba->memory.savedata);
606 break;
607 case SAVEDATA_EEPROM:
608 GBASavedataInitEEPROM(&gba->memory.savedata);
609 break;
610 case SAVEDATA_SRAM:
611 GBASavedataInitSRAM(&gba->memory.savedata);
612 break;
613 case SAVEDATA_NONE:
614 break;
615 }
616
617 if (_overrides[i].gpio & GPIO_RTC) {
618 GBAGPIOInitRTC(&gba->memory.gpio);
619 }
620
621 if (_overrides[i].gpio & GPIO_GYRO) {
622 GBAGPIOInitGyro(&gba->memory.gpio);
623 }
624
625 if (_overrides[i].gpio & GPIO_RUMBLE) {
626 GBAGPIOInitRumble(&gba->memory.gpio);
627 }
628 return;
629 }
630 }
631}