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#include "util/vfile.h"
11
12const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
13const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
14
15enum {
16 SP_BASE_SYSTEM = 0x03FFFF00,
17 SP_BASE_IRQ = 0x03FFFFA0,
18 SP_BASE_SUPERVISOR = 0x03FFFFE0
19};
20
21struct GBACartridgeOverride {
22 const char id[4];
23 enum SavedataType type;
24 int gpio;
25};
26
27static const struct GBACartridgeOverride _overrides[] = {
28 // Boktai: The Sun is in Your Hand
29 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
30 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
31
32 // Boktai 2: Solar Boy Django
33 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
34 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
35
36 // Drill Dozer
37 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE },
38 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE },
39
40 // Pokemon Ruby
41 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC },
42 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC },
43 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC },
44 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC },
45 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC },
46 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC },
47 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC },
48
49 // Pokemon Sapphire
50 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC },
51 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC },
52 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC },
53 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC },
54 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC },
55 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC },
56 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC },
57
58 // Pokemon Emerald
59 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC },
60 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC },
61 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC },
62 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC },
63 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC },
64 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC },
65 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC },
66
67 // Pokemon FireRed
68 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE },
69 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE },
70 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE },
71
72 // Pokemon LeafGreen
73 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE },
74 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE },
75 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE },
76
77 // RockMan EXE 4.5 - Real Operation
78 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC },
79
80 // Super Mario Advance 4
81 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE },
82 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE },
83 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE },
84
85 // Wario Ware Twisted
86 { "RWZJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
87 { "RWZE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
88 { "RWZP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
89
90 { { 0, 0, 0, 0 }, 0, 0 }
91};
92
93static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
94static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
95static void GBAProcessEvents(struct ARMCore* cpu);
96static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
97static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
98static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
99
100static void _checkOverrides(struct GBA* gba, uint32_t code);
101
102void GBACreate(struct GBA* gba) {
103 gba->d.id = GBA_COMPONENT_MAGIC;
104 gba->d.init = GBAInit;
105 gba->d.deinit = 0;
106}
107
108static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
109 struct GBA* gba = (struct GBA*) component;
110 gba->cpu = cpu;
111 gba->debugger = 0;
112
113 GBAInterruptHandlerInit(&cpu->irqh);
114 GBAMemoryInit(gba);
115
116 gba->video.p = gba;
117 GBAVideoInit(&gba->video);
118
119 gba->audio.p = gba;
120 GBAAudioInit(&gba->audio);
121
122 GBAIOInit(gba);
123
124 gba->sio.p = gba;
125 GBASIOInit(&gba->sio);
126
127 gba->timersEnabled = 0;
128 memset(gba->timers, 0, sizeof(gba->timers));
129
130 gba->springIRQ = 0;
131 gba->keySource = 0;
132 gba->rotationSource = 0;
133 gba->rumble = 0;
134
135 gba->romVf = 0;
136 gba->biosVf = 0;
137
138 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
139
140 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
141}
142
143void GBADestroy(struct GBA* gba) {
144 if (gba->pristineRom == gba->memory.rom) {
145 gba->memory.rom = 0;
146 }
147
148 if (gba->romVf) {
149 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
150 }
151
152 if (gba->biosVf) {
153 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
154 }
155
156 GBAMemoryDeinit(gba);
157 GBAVideoDeinit(&gba->video);
158 GBAAudioDeinit(&gba->audio);
159}
160
161void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
162 irqh->reset = GBAReset;
163 irqh->processEvents = GBAProcessEvents;
164 irqh->swi16 = GBASwi16;
165 irqh->swi32 = GBASwi32;
166 irqh->hitIllegal = GBAIllegal;
167 irqh->readCPSR = GBATestIRQ;
168 irqh->hitStub = GBAHitStub;
169}
170
171void GBAReset(struct ARMCore* cpu) {
172 ARMSetPrivilegeMode(cpu, MODE_IRQ);
173 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
174 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
175 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
176 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
177 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
178}
179
180static void GBAProcessEvents(struct ARMCore* cpu) {
181 do {
182 struct GBA* gba = (struct GBA*) cpu->master;
183 int32_t cycles = cpu->cycles;
184 int32_t nextEvent = INT_MAX;
185 int32_t testEvent;
186
187 if (gba->springIRQ) {
188 ARMRaiseIRQ(cpu);
189 gba->springIRQ = 0;
190 }
191
192 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
193 if (testEvent < nextEvent) {
194 nextEvent = testEvent;
195 }
196
197 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
198 if (testEvent < nextEvent) {
199 nextEvent = testEvent;
200 }
201
202 testEvent = GBATimersProcessEvents(gba, cycles);
203 if (testEvent < nextEvent) {
204 nextEvent = testEvent;
205 }
206
207 testEvent = GBAMemoryRunDMAs(gba, cycles);
208 if (testEvent < nextEvent) {
209 nextEvent = testEvent;
210 }
211
212 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
213 if (testEvent < nextEvent) {
214 nextEvent = testEvent;
215 }
216
217 cpu->cycles -= cycles;
218 cpu->nextEvent = nextEvent;
219
220 if (cpu->halted) {
221 cpu->cycles = cpu->nextEvent;
222 }
223 } while (cpu->cycles >= cpu->nextEvent);
224}
225
226static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
227 int32_t nextEvent = INT_MAX;
228 if (gba->timersEnabled) {
229 struct GBATimer* timer;
230 struct GBATimer* nextTimer;
231
232 timer = &gba->timers[0];
233 if (timer->enable) {
234 timer->nextEvent -= cycles;
235 timer->lastEvent -= cycles;
236 if (timer->nextEvent <= 0) {
237 timer->lastEvent = timer->nextEvent;
238 timer->nextEvent += timer->overflowInterval;
239 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
240 timer->oldReload = timer->reload;
241
242 if (timer->doIrq) {
243 GBARaiseIRQ(gba, IRQ_TIMER0);
244 }
245
246 if (gba->audio.enable) {
247 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
248 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
249 }
250
251 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
252 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
253 }
254 }
255
256 nextTimer = &gba->timers[1];
257 if (nextTimer->countUp) {
258 ++gba->memory.io[REG_TM1CNT_LO >> 1];
259 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
260 nextTimer->nextEvent = 0;
261 }
262 }
263 }
264 nextEvent = timer->nextEvent;
265 }
266
267 timer = &gba->timers[1];
268 if (timer->enable) {
269 timer->nextEvent -= cycles;
270 timer->lastEvent -= cycles;
271 if (timer->nextEvent <= 0) {
272 timer->lastEvent = timer->nextEvent;
273 timer->nextEvent += timer->overflowInterval;
274 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
275 timer->oldReload = timer->reload;
276
277 if (timer->doIrq) {
278 GBARaiseIRQ(gba, IRQ_TIMER1);
279 }
280
281 if (gba->audio.enable) {
282 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
283 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
284 }
285
286 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
287 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
288 }
289 }
290
291 if (timer->countUp) {
292 timer->nextEvent = INT_MAX;
293 }
294
295 nextTimer = &gba->timers[2];
296 if (nextTimer->countUp) {
297 ++gba->memory.io[REG_TM2CNT_LO >> 1];
298 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
299 nextTimer->nextEvent = 0;
300 }
301 }
302 }
303 if (timer->nextEvent < nextEvent) {
304 nextEvent = timer->nextEvent;
305 }
306 }
307
308 timer = &gba->timers[2];
309 if (timer->enable) {
310 timer->nextEvent -= cycles;
311 timer->lastEvent -= cycles;
312 nextEvent = timer->nextEvent;
313 if (timer->nextEvent <= 0) {
314 timer->lastEvent = timer->nextEvent;
315 timer->nextEvent += timer->overflowInterval;
316 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
317 timer->oldReload = timer->reload;
318
319 if (timer->doIrq) {
320 GBARaiseIRQ(gba, IRQ_TIMER2);
321 }
322
323 if (timer->countUp) {
324 timer->nextEvent = INT_MAX;
325 }
326
327 nextTimer = &gba->timers[3];
328 if (nextTimer->countUp) {
329 ++gba->memory.io[REG_TM3CNT_LO >> 1];
330 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
331 nextTimer->nextEvent = 0;
332 }
333 }
334 }
335 if (timer->nextEvent < nextEvent) {
336 nextEvent = timer->nextEvent;
337 }
338 }
339
340 timer = &gba->timers[3];
341 if (timer->enable) {
342 timer->nextEvent -= cycles;
343 timer->lastEvent -= cycles;
344 nextEvent = timer->nextEvent;
345 if (timer->nextEvent <= 0) {
346 timer->lastEvent = timer->nextEvent;
347 timer->nextEvent += timer->overflowInterval;
348 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
349 timer->oldReload = timer->reload;
350
351 if (timer->doIrq) {
352 GBARaiseIRQ(gba, IRQ_TIMER3);
353 }
354
355 if (timer->countUp) {
356 timer->nextEvent = INT_MAX;
357 }
358 }
359 if (timer->nextEvent < nextEvent) {
360 nextEvent = timer->nextEvent;
361 }
362 }
363 }
364 return nextEvent;
365}
366
367void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
368 gba->debugger = debugger;
369}
370
371void GBADetachDebugger(struct GBA* gba) {
372 gba->debugger = 0;
373}
374
375void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
376 gba->romVf = vf;
377 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
378 vf->seek(vf, 0, SEEK_SET);
379 gba->pristineRom = vf->map(vf, SIZE_CART0, MEMORY_READ);
380 gba->memory.rom = gba->pristineRom;
381 gba->activeFile = fname;
382 gba->memory.romSize = gba->pristineRomSize;
383 GBASavedataInit(&gba->memory.savedata, sav);
384 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
385 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
386 // TODO: error check
387}
388
389void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
390 gba->biosVf = vf;
391 gba->memory.bios = vf->map(vf, SIZE_BIOS, MEMORY_READ);
392 gba->memory.fullBios = 1;
393 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
394 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
395 if (checksum == GBA_BIOS_CHECKSUM) {
396 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
397 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
398 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
399 } else {
400 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
401 }
402 gba->biosChecksum = checksum;
403 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
404 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
405 }
406 // TODO: error check
407}
408
409void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
410 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
411 if (!patchedSize) {
412 return;
413 }
414 gba->memory.rom = anonymousMemoryMap(patchedSize);
415 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
416 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
417 mappedMemoryFree(gba->memory.rom, patchedSize);
418 gba->memory.rom = gba->pristineRom;
419 return;
420 }
421 gba->memory.romSize = patchedSize;
422}
423
424void GBATimerUpdateRegister(struct GBA* gba, int timer) {
425 struct GBATimer* currentTimer = &gba->timers[timer];
426 if (currentTimer->enable && !currentTimer->countUp) {
427 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
428 }
429}
430
431void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
432 gba->timers[timer].reload = reload;
433}
434
435void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
436 struct GBATimer* currentTimer = &gba->timers[timer];
437 GBATimerUpdateRegister(gba, timer);
438
439 int oldPrescale = currentTimer->prescaleBits;
440 switch (control & 0x0003) {
441 case 0x0000:
442 currentTimer->prescaleBits = 0;
443 break;
444 case 0x0001:
445 currentTimer->prescaleBits = 6;
446 break;
447 case 0x0002:
448 currentTimer->prescaleBits = 8;
449 break;
450 case 0x0003:
451 currentTimer->prescaleBits = 10;
452 break;
453 }
454 currentTimer->countUp = !!(control & 0x0004);
455 currentTimer->doIrq = !!(control & 0x0040);
456 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
457 int wasEnabled = currentTimer->enable;
458 currentTimer->enable = !!(control & 0x0080);
459 if (!wasEnabled && currentTimer->enable) {
460 if (!currentTimer->countUp) {
461 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
462 } else {
463 currentTimer->nextEvent = INT_MAX;
464 }
465 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
466 currentTimer->oldReload = currentTimer->reload;
467 currentTimer->lastEvent = 0;
468 gba->timersEnabled |= 1 << timer;
469 } else if (wasEnabled && !currentTimer->enable) {
470 if (!currentTimer->countUp) {
471 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
472 }
473 gba->timersEnabled &= ~(1 << timer);
474 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
475 // FIXME: this might be before present
476 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
477 }
478
479 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
480 gba->cpu->nextEvent = currentTimer->nextEvent;
481 }
482};
483
484void GBAWriteIE(struct GBA* gba, uint16_t value) {
485 if (value & (1 << IRQ_KEYPAD)) {
486 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
487 }
488
489 if (value & (1 << IRQ_GAMEPAK)) {
490 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
491 }
492
493 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
494 ARMRaiseIRQ(gba->cpu);
495 }
496}
497
498void GBAWriteIME(struct GBA* gba, uint16_t value) {
499 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
500 ARMRaiseIRQ(gba->cpu);
501 }
502}
503
504void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
505 gba->memory.io[REG_IF >> 1] |= 1 << irq;
506 gba->cpu->halted = 0;
507
508 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
509 ARMRaiseIRQ(gba->cpu);
510 }
511}
512
513void GBATestIRQ(struct ARMCore* cpu) {
514 struct GBA* gba = (struct GBA*) cpu->master;
515 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
516 gba->springIRQ = 1;
517 gba->cpu->nextEvent = 0;
518 }
519}
520
521void GBAHalt(struct GBA* gba) {
522 gba->cpu->nextEvent = 0;
523 gba->cpu->halted = 1;
524}
525
526static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
527 if (!gba) {
528 struct GBAThread* threadContext = GBAThreadGetContext();
529 if (threadContext) {
530 gba = threadContext->gba;
531 }
532 }
533
534 if (gba && gba->logHandler) {
535 gba->logHandler(gba, level, format, args);
536 return;
537 }
538
539 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
540 return;
541 }
542
543 vprintf(format, args);
544 printf("\n");
545
546 if (level == GBA_LOG_FATAL) {
547 abort();
548 }
549}
550
551void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
552 va_list args;
553 va_start(args, format);
554 _GBAVLog(gba, level, format, args);
555 va_end(args);
556}
557
558void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
559 struct GBA* gba = 0;
560 if (debugger->cpu) {
561 gba = (struct GBA*) debugger->cpu->master;
562 }
563
564 enum GBALogLevel gbaLevel;
565 switch (level) {
566 case DEBUGGER_LOG_DEBUG:
567 gbaLevel = GBA_LOG_DEBUG;
568 break;
569 case DEBUGGER_LOG_INFO:
570 gbaLevel = GBA_LOG_INFO;
571 break;
572 case DEBUGGER_LOG_WARN:
573 gbaLevel = GBA_LOG_WARN;
574 break;
575 case DEBUGGER_LOG_ERROR:
576 gbaLevel = GBA_LOG_ERROR;
577 break;
578 }
579 va_list args;
580 va_start(args, format);
581 _GBAVLog(gba, gbaLevel, format, args);
582 va_end(args);
583}
584
585
586void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
587 struct GBA* gba = (struct GBA*) cpu->master;
588 enum GBALogLevel level = GBA_LOG_FATAL;
589 if (gba->debugger) {
590 level = GBA_LOG_STUB;
591 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
592 }
593 GBALog(gba, level, "Stub opcode: %08x", opcode);
594}
595
596void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
597 struct GBA* gba = (struct GBA*) cpu->master;
598 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
599 if (gba->debugger) {
600 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
601 }
602}
603
604void _checkOverrides(struct GBA* gba, uint32_t id) {
605 int i;
606 for (i = 0; _overrides[i].id[0]; ++i) {
607 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
608 if (*overrideId == id) {
609 switch (_overrides[i].type) {
610 case SAVEDATA_FLASH512:
611 case SAVEDATA_FLASH1M:
612 gba->memory.savedata.type = _overrides[i].type;
613 GBASavedataInitFlash(&gba->memory.savedata);
614 break;
615 case SAVEDATA_EEPROM:
616 GBASavedataInitEEPROM(&gba->memory.savedata);
617 break;
618 case SAVEDATA_SRAM:
619 GBASavedataInitSRAM(&gba->memory.savedata);
620 break;
621 case SAVEDATA_NONE:
622 break;
623 }
624
625 if (_overrides[i].gpio & GPIO_RTC) {
626 GBAGPIOInitRTC(&gba->memory.gpio);
627 }
628
629 if (_overrides[i].gpio & GPIO_GYRO) {
630 GBAGPIOInitGyro(&gba->memory.gpio);
631 }
632
633 if (_overrides[i].gpio & GPIO_RUMBLE) {
634 GBAGPIOInitRumble(&gba->memory.gpio);
635 }
636 return;
637 }
638 }
639}