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 gba->savefile = 0;
113
114 GBAInterruptHandlerInit(&cpu->irqh);
115 GBAMemoryInit(gba);
116
117 gba->video.p = gba;
118 GBAVideoInit(&gba->video);
119
120 gba->audio.p = gba;
121 GBAAudioInit(&gba->audio);
122
123 GBAIOInit(gba);
124
125 gba->sio.p = gba;
126 GBASIOInit(&gba->sio);
127
128 gba->timersEnabled = 0;
129 memset(gba->timers, 0, sizeof(gba->timers));
130
131 gba->springIRQ = 0;
132 gba->keySource = 0;
133 gba->rotationSource = 0;
134 gba->rumble = 0;
135
136 gba->romVf = 0;
137 gba->biosVf = 0;
138
139 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
140
141 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
142}
143
144void GBADestroy(struct GBA* gba) {
145 if (gba->pristineRom == gba->memory.rom) {
146 gba->memory.rom = 0;
147 }
148
149 if (gba->romVf) {
150 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
151 }
152
153 if (gba->biosVf) {
154 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
155 }
156
157 GBAMemoryDeinit(gba);
158 GBAVideoDeinit(&gba->video);
159 GBAAudioDeinit(&gba->audio);
160}
161
162void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
163 irqh->reset = GBAReset;
164 irqh->processEvents = GBAProcessEvents;
165 irqh->swi16 = GBASwi16;
166 irqh->swi32 = GBASwi32;
167 irqh->hitIllegal = GBAIllegal;
168 irqh->readCPSR = GBATestIRQ;
169 irqh->hitStub = GBAHitStub;
170}
171
172void GBAReset(struct ARMCore* cpu) {
173 ARMSetPrivilegeMode(cpu, MODE_IRQ);
174 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
175 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
176 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
177 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
178 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
179}
180
181static void GBAProcessEvents(struct ARMCore* cpu) {
182 do {
183 struct GBA* gba = (struct GBA*) cpu->master;
184 int32_t cycles = cpu->cycles;
185 int32_t nextEvent = INT_MAX;
186 int32_t testEvent;
187
188 if (gba->springIRQ) {
189 ARMRaiseIRQ(cpu);
190 gba->springIRQ = 0;
191 }
192
193 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
194 if (testEvent < nextEvent) {
195 nextEvent = testEvent;
196 }
197
198 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
199 if (testEvent < nextEvent) {
200 nextEvent = testEvent;
201 }
202
203 testEvent = GBATimersProcessEvents(gba, cycles);
204 if (testEvent < nextEvent) {
205 nextEvent = testEvent;
206 }
207
208 testEvent = GBAMemoryRunDMAs(gba, cycles);
209 if (testEvent < nextEvent) {
210 nextEvent = testEvent;
211 }
212
213 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
214 if (testEvent < nextEvent) {
215 nextEvent = testEvent;
216 }
217
218 cpu->cycles -= cycles;
219 cpu->nextEvent = nextEvent;
220
221 if (cpu->halted) {
222 cpu->cycles = cpu->nextEvent;
223 }
224 } while (cpu->cycles >= cpu->nextEvent);
225}
226
227static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
228 int32_t nextEvent = INT_MAX;
229 if (gba->timersEnabled) {
230 struct GBATimer* timer;
231 struct GBATimer* nextTimer;
232
233 timer = &gba->timers[0];
234 if (timer->enable) {
235 timer->nextEvent -= cycles;
236 timer->lastEvent -= cycles;
237 if (timer->nextEvent <= 0) {
238 timer->lastEvent = timer->nextEvent;
239 timer->nextEvent += timer->overflowInterval;
240 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
241 timer->oldReload = timer->reload;
242
243 if (timer->doIrq) {
244 GBARaiseIRQ(gba, IRQ_TIMER0);
245 }
246
247 if (gba->audio.enable) {
248 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
249 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
250 }
251
252 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
253 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
254 }
255 }
256
257 nextTimer = &gba->timers[1];
258 if (nextTimer->countUp) {
259 ++gba->memory.io[REG_TM1CNT_LO >> 1];
260 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
261 nextTimer->nextEvent = 0;
262 }
263 }
264 }
265 nextEvent = timer->nextEvent;
266 }
267
268 timer = &gba->timers[1];
269 if (timer->enable) {
270 timer->nextEvent -= cycles;
271 timer->lastEvent -= cycles;
272 if (timer->nextEvent <= 0) {
273 timer->lastEvent = timer->nextEvent;
274 timer->nextEvent += timer->overflowInterval;
275 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
276 timer->oldReload = timer->reload;
277
278 if (timer->doIrq) {
279 GBARaiseIRQ(gba, IRQ_TIMER1);
280 }
281
282 if (gba->audio.enable) {
283 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
284 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
285 }
286
287 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
288 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
289 }
290 }
291
292 if (timer->countUp) {
293 timer->nextEvent = INT_MAX;
294 }
295
296 nextTimer = &gba->timers[2];
297 if (nextTimer->countUp) {
298 ++gba->memory.io[REG_TM2CNT_LO >> 1];
299 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
300 nextTimer->nextEvent = 0;
301 }
302 }
303 }
304 if (timer->nextEvent < nextEvent) {
305 nextEvent = timer->nextEvent;
306 }
307 }
308
309 timer = &gba->timers[2];
310 if (timer->enable) {
311 timer->nextEvent -= cycles;
312 timer->lastEvent -= cycles;
313 nextEvent = timer->nextEvent;
314 if (timer->nextEvent <= 0) {
315 timer->lastEvent = timer->nextEvent;
316 timer->nextEvent += timer->overflowInterval;
317 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
318 timer->oldReload = timer->reload;
319
320 if (timer->doIrq) {
321 GBARaiseIRQ(gba, IRQ_TIMER2);
322 }
323
324 if (timer->countUp) {
325 timer->nextEvent = INT_MAX;
326 }
327
328 nextTimer = &gba->timers[3];
329 if (nextTimer->countUp) {
330 ++gba->memory.io[REG_TM3CNT_LO >> 1];
331 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
332 nextTimer->nextEvent = 0;
333 }
334 }
335 }
336 if (timer->nextEvent < nextEvent) {
337 nextEvent = timer->nextEvent;
338 }
339 }
340
341 timer = &gba->timers[3];
342 if (timer->enable) {
343 timer->nextEvent -= cycles;
344 timer->lastEvent -= cycles;
345 nextEvent = timer->nextEvent;
346 if (timer->nextEvent <= 0) {
347 timer->lastEvent = timer->nextEvent;
348 timer->nextEvent += timer->overflowInterval;
349 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
350 timer->oldReload = timer->reload;
351
352 if (timer->doIrq) {
353 GBARaiseIRQ(gba, IRQ_TIMER3);
354 }
355
356 if (timer->countUp) {
357 timer->nextEvent = INT_MAX;
358 }
359 }
360 if (timer->nextEvent < nextEvent) {
361 nextEvent = timer->nextEvent;
362 }
363 }
364 }
365 return nextEvent;
366}
367
368void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
369 gba->debugger = debugger;
370}
371
372void GBADetachDebugger(struct GBA* gba) {
373 gba->debugger = 0;
374}
375
376void GBALoadROM(struct GBA* gba, struct VFile* vf, const char* fname) {
377 gba->romVf = vf;
378 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
379 vf->seek(vf, 0, SEEK_SET);
380 gba->pristineRom = vf->map(vf, SIZE_CART0, MEMORY_READ);
381 gba->memory.rom = gba->pristineRom;
382 gba->activeFile = fname;
383 gba->memory.romSize = gba->pristineRomSize;
384 if (gba->savefile) {
385 GBASavedataInit(&gba->memory.savedata, gba->savefile);
386 }
387 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
388 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
389 // TODO: error check
390}
391
392void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
393 gba->biosVf = vf;
394 gba->memory.bios = vf->map(vf, SIZE_BIOS, MEMORY_READ);
395 gba->memory.fullBios = 1;
396 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
397 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
398 if (checksum == GBA_BIOS_CHECKSUM) {
399 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
400 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
401 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
402 } else {
403 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
404 }
405 gba->biosChecksum = checksum;
406 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
407 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
408 }
409 // TODO: error check
410}
411
412void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
413 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
414 if (!patchedSize) {
415 return;
416 }
417 gba->memory.rom = anonymousMemoryMap(patchedSize);
418 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
419 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
420 mappedMemoryFree(gba->memory.rom, patchedSize);
421 gba->memory.rom = gba->pristineRom;
422 return;
423 }
424 gba->memory.romSize = patchedSize;
425}
426
427void GBATimerUpdateRegister(struct GBA* gba, int timer) {
428 struct GBATimer* currentTimer = &gba->timers[timer];
429 if (currentTimer->enable && !currentTimer->countUp) {
430 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
431 }
432}
433
434void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
435 gba->timers[timer].reload = reload;
436}
437
438void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
439 struct GBATimer* currentTimer = &gba->timers[timer];
440 GBATimerUpdateRegister(gba, timer);
441
442 int oldPrescale = currentTimer->prescaleBits;
443 switch (control & 0x0003) {
444 case 0x0000:
445 currentTimer->prescaleBits = 0;
446 break;
447 case 0x0001:
448 currentTimer->prescaleBits = 6;
449 break;
450 case 0x0002:
451 currentTimer->prescaleBits = 8;
452 break;
453 case 0x0003:
454 currentTimer->prescaleBits = 10;
455 break;
456 }
457 currentTimer->countUp = !!(control & 0x0004);
458 currentTimer->doIrq = !!(control & 0x0040);
459 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
460 int wasEnabled = currentTimer->enable;
461 currentTimer->enable = !!(control & 0x0080);
462 if (!wasEnabled && currentTimer->enable) {
463 if (!currentTimer->countUp) {
464 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
465 } else {
466 currentTimer->nextEvent = INT_MAX;
467 }
468 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
469 currentTimer->oldReload = currentTimer->reload;
470 currentTimer->lastEvent = 0;
471 gba->timersEnabled |= 1 << timer;
472 } else if (wasEnabled && !currentTimer->enable) {
473 if (!currentTimer->countUp) {
474 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
475 }
476 gba->timersEnabled &= ~(1 << timer);
477 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
478 // FIXME: this might be before present
479 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
480 }
481
482 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
483 gba->cpu->nextEvent = currentTimer->nextEvent;
484 }
485};
486
487void GBAWriteIE(struct GBA* gba, uint16_t value) {
488 if (value & (1 << IRQ_KEYPAD)) {
489 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
490 }
491
492 if (value & (1 << IRQ_GAMEPAK)) {
493 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
494 }
495
496 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
497 ARMRaiseIRQ(gba->cpu);
498 }
499}
500
501void GBAWriteIME(struct GBA* gba, uint16_t value) {
502 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
503 ARMRaiseIRQ(gba->cpu);
504 }
505}
506
507void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
508 gba->memory.io[REG_IF >> 1] |= 1 << irq;
509 gba->cpu->halted = 0;
510
511 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
512 ARMRaiseIRQ(gba->cpu);
513 }
514}
515
516void GBATestIRQ(struct ARMCore* cpu) {
517 struct GBA* gba = (struct GBA*) cpu->master;
518 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
519 gba->springIRQ = 1;
520 gba->cpu->nextEvent = 0;
521 }
522}
523
524void GBAHalt(struct GBA* gba) {
525 gba->cpu->nextEvent = 0;
526 gba->cpu->halted = 1;
527}
528
529static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
530 if (!gba) {
531 struct GBAThread* threadContext = GBAThreadGetContext();
532 if (threadContext) {
533 gba = threadContext->gba;
534 }
535 }
536
537 if (gba && gba->logHandler) {
538 gba->logHandler(gba, level, format, args);
539 return;
540 }
541
542 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
543 return;
544 }
545
546 vprintf(format, args);
547 printf("\n");
548
549 if (level == GBA_LOG_FATAL) {
550 abort();
551 }
552}
553
554void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
555 va_list args;
556 va_start(args, format);
557 _GBAVLog(gba, level, format, args);
558 va_end(args);
559}
560
561void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
562 struct GBA* gba = 0;
563 if (debugger->cpu) {
564 gba = (struct GBA*) debugger->cpu->master;
565 }
566
567 enum GBALogLevel gbaLevel;
568 switch (level) {
569 case DEBUGGER_LOG_DEBUG:
570 gbaLevel = GBA_LOG_DEBUG;
571 break;
572 case DEBUGGER_LOG_INFO:
573 gbaLevel = GBA_LOG_INFO;
574 break;
575 case DEBUGGER_LOG_WARN:
576 gbaLevel = GBA_LOG_WARN;
577 break;
578 case DEBUGGER_LOG_ERROR:
579 gbaLevel = GBA_LOG_ERROR;
580 break;
581 }
582 va_list args;
583 va_start(args, format);
584 _GBAVLog(gba, gbaLevel, format, args);
585 va_end(args);
586}
587
588
589void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
590 struct GBA* gba = (struct GBA*) cpu->master;
591 enum GBALogLevel level = GBA_LOG_FATAL;
592 if (gba->debugger) {
593 level = GBA_LOG_STUB;
594 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
595 }
596 GBALog(gba, level, "Stub opcode: %08x", opcode);
597}
598
599void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
600 struct GBA* gba = (struct GBA*) cpu->master;
601 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
602 if (gba->debugger) {
603 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
604 }
605}
606
607void _checkOverrides(struct GBA* gba, uint32_t id) {
608 int i;
609 for (i = 0; _overrides[i].id[0]; ++i) {
610 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
611 if (*overrideId == id) {
612 switch (_overrides[i].type) {
613 case SAVEDATA_FLASH512:
614 case SAVEDATA_FLASH1M:
615 gba->memory.savedata.type = _overrides[i].type;
616 GBASavedataInitFlash(&gba->memory.savedata);
617 break;
618 case SAVEDATA_EEPROM:
619 GBASavedataInitEEPROM(&gba->memory.savedata);
620 break;
621 case SAVEDATA_SRAM:
622 GBASavedataInitSRAM(&gba->memory.savedata);
623 break;
624 case SAVEDATA_NONE:
625 break;
626 }
627
628 if (_overrides[i].gpio & GPIO_RTC) {
629 GBAGPIOInitRTC(&gba->memory.gpio);
630 }
631
632 if (_overrides[i].gpio & GPIO_GYRO) {
633 GBAGPIOInitGyro(&gba->memory.gpio);
634 }
635
636 if (_overrides[i].gpio & GPIO_RUMBLE) {
637 GBAGPIOInitRumble(&gba->memory.gpio);
638 }
639 return;
640 }
641 }
642}