src/gba/gba.c (view raw)
1#include "gba.h"
2
3#include "gba-bios.h"
4#include "gba-io.h"
5#include "gba-rr.h"
6#include "gba-sio.h"
7#include "gba-thread.h"
8
9#include "util/crc32.h"
10#include "util/memory.h"
11#include "util/patch.h"
12#include "util/vfs.h"
13
14const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
15const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
16
17static const uint64_t GBA_ROM_MAGIC = 0x21A29A6951AEFF24;
18
19enum {
20 SP_BASE_SYSTEM = 0x03FFFF00,
21 SP_BASE_IRQ = 0x03FFFFA0,
22 SP_BASE_SUPERVISOR = 0x03FFFFE0
23};
24
25struct GBACartridgeOverride {
26 const char id[4];
27 enum SavedataType type;
28 int gpio;
29 uint32_t busyLoop;
30};
31
32static const struct GBACartridgeOverride _overrides[] = {
33 // Boktai: The Sun is in Your Hand
34 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
35 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
36
37 // Boktai 2: Solar Boy Django
38 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
39 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
40
41 // Drill Dozer
42 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
43 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
44
45 // Final Fantasy Tactics Advance
46 { "AFXE", SAVEDATA_FLASH512, GPIO_NONE, 0x8000418 },
47
48 // Mega Man Battle Network
49 { "AREE", SAVEDATA_SRAM, GPIO_NONE, 0x800032E },
50
51 // Pokemon Ruby
52 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
53 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
54 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
55 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
56 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
57 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
58 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
59
60 // Pokemon Sapphire
61 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
62 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
63 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
64 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
65 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
66 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
67 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
68
69 // Pokemon Emerald
70 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
71 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
72 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
73 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
74 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
75 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
76 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
77
78 // Pokemon FireRed
79 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
80 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
81 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
82
83 // Pokemon LeafGreen
84 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
85 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
86 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
87
88 // RockMan EXE 4.5 - Real Operation
89 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC, -1 },
90
91 // Super Mario Advance 4
92 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
93 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
94 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
95
96 // Wario Ware Twisted
97 { "RZWJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
98 { "RZWE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
99 { "RZWP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
100
101 { { 0, 0, 0, 0 }, 0, 0, -1 }
102};
103
104static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
105static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
106static void GBAProcessEvents(struct ARMCore* cpu);
107static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
108static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
109static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
110
111static void _checkOverrides(struct GBA* gba, uint32_t code);
112
113void GBACreate(struct GBA* gba) {
114 gba->d.id = GBA_COMPONENT_MAGIC;
115 gba->d.init = GBAInit;
116 gba->d.deinit = 0;
117}
118
119static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
120 struct GBA* gba = (struct GBA*) component;
121 gba->cpu = cpu;
122 gba->debugger = 0;
123
124 GBAInterruptHandlerInit(&cpu->irqh);
125 GBAMemoryInit(gba);
126
127 gba->video.p = gba;
128 GBAVideoInit(&gba->video);
129
130 gba->audio.p = gba;
131 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
132
133 GBAIOInit(gba);
134
135 gba->sio.p = gba;
136 GBASIOInit(&gba->sio);
137
138 gba->timersEnabled = 0;
139 memset(gba->timers, 0, sizeof(gba->timers));
140
141 gba->springIRQ = 0;
142 gba->keySource = 0;
143 gba->rotationSource = 0;
144 gba->rumble = 0;
145 gba->rr = 0;
146
147 gba->romVf = 0;
148 gba->biosVf = 0;
149
150 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
151
152 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
153}
154
155void GBADestroy(struct GBA* gba) {
156 if (gba->pristineRom == gba->memory.rom) {
157 gba->memory.rom = 0;
158 }
159
160 if (gba->romVf) {
161 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
162 }
163
164 if (gba->biosVf) {
165 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
166 }
167
168 GBAMemoryDeinit(gba);
169 GBAVideoDeinit(&gba->video);
170 GBAAudioDeinit(&gba->audio);
171 GBARRContextDestroy(gba);
172}
173
174void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
175 irqh->reset = GBAReset;
176 irqh->processEvents = GBAProcessEvents;
177 irqh->swi16 = GBASwi16;
178 irqh->swi32 = GBASwi32;
179 irqh->hitIllegal = GBAIllegal;
180 irqh->readCPSR = GBATestIRQ;
181 irqh->hitStub = GBAHitStub;
182}
183
184void GBAReset(struct ARMCore* cpu) {
185 ARMSetPrivilegeMode(cpu, MODE_IRQ);
186 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
187 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
188 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
189 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
190 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
191
192 struct GBA* gba = (struct GBA*) cpu->master;
193 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
194 GBASavedataUnmask(&gba->memory.savedata);
195 }
196 GBAMemoryReset(gba);
197 GBAVideoReset(&gba->video);
198 GBAAudioReset(&gba->audio);
199 GBAIOInit(gba);
200}
201
202static void GBAProcessEvents(struct ARMCore* cpu) {
203 do {
204 struct GBA* gba = (struct GBA*) cpu->master;
205 int32_t cycles = cpu->cycles;
206 int32_t nextEvent = INT_MAX;
207 int32_t testEvent;
208
209 if (gba->springIRQ) {
210 ARMRaiseIRQ(cpu);
211 gba->springIRQ = 0;
212 }
213
214 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
215 if (testEvent < nextEvent) {
216 nextEvent = testEvent;
217 }
218
219 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
220 if (testEvent < nextEvent) {
221 nextEvent = testEvent;
222 }
223
224 testEvent = GBATimersProcessEvents(gba, cycles);
225 if (testEvent < nextEvent) {
226 nextEvent = testEvent;
227 }
228
229 testEvent = GBAMemoryRunDMAs(gba, cycles);
230 if (testEvent < nextEvent) {
231 nextEvent = testEvent;
232 }
233
234 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
235 if (testEvent < nextEvent) {
236 nextEvent = testEvent;
237 }
238
239 cpu->cycles -= cycles;
240 cpu->nextEvent = nextEvent;
241
242 if (cpu->halted) {
243 cpu->cycles = cpu->nextEvent;
244 }
245 } while (cpu->cycles >= cpu->nextEvent);
246}
247
248static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
249 int32_t nextEvent = INT_MAX;
250 if (gba->timersEnabled) {
251 struct GBATimer* timer;
252 struct GBATimer* nextTimer;
253
254 timer = &gba->timers[0];
255 if (timer->enable) {
256 timer->nextEvent -= cycles;
257 timer->lastEvent -= cycles;
258 if (timer->nextEvent <= 0) {
259 timer->lastEvent = timer->nextEvent;
260 timer->nextEvent += timer->overflowInterval;
261 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
262 timer->oldReload = timer->reload;
263
264 if (timer->doIrq) {
265 GBARaiseIRQ(gba, IRQ_TIMER0);
266 }
267
268 if (gba->audio.enable) {
269 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
270 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
271 }
272
273 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
274 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
275 }
276 }
277
278 nextTimer = &gba->timers[1];
279 if (nextTimer->countUp) {
280 ++gba->memory.io[REG_TM1CNT_LO >> 1];
281 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
282 nextTimer->nextEvent = 0;
283 }
284 }
285 }
286 nextEvent = timer->nextEvent;
287 }
288
289 timer = &gba->timers[1];
290 if (timer->enable) {
291 timer->nextEvent -= cycles;
292 timer->lastEvent -= cycles;
293 if (timer->nextEvent <= 0) {
294 timer->lastEvent = timer->nextEvent;
295 timer->nextEvent += timer->overflowInterval;
296 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
297 timer->oldReload = timer->reload;
298
299 if (timer->doIrq) {
300 GBARaiseIRQ(gba, IRQ_TIMER1);
301 }
302
303 if (gba->audio.enable) {
304 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
305 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
306 }
307
308 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
309 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
310 }
311 }
312
313 if (timer->countUp) {
314 timer->nextEvent = INT_MAX;
315 }
316
317 nextTimer = &gba->timers[2];
318 if (nextTimer->countUp) {
319 ++gba->memory.io[REG_TM2CNT_LO >> 1];
320 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
321 nextTimer->nextEvent = 0;
322 }
323 }
324 }
325 if (timer->nextEvent < nextEvent) {
326 nextEvent = timer->nextEvent;
327 }
328 }
329
330 timer = &gba->timers[2];
331 if (timer->enable) {
332 timer->nextEvent -= cycles;
333 timer->lastEvent -= cycles;
334 nextEvent = timer->nextEvent;
335 if (timer->nextEvent <= 0) {
336 timer->lastEvent = timer->nextEvent;
337 timer->nextEvent += timer->overflowInterval;
338 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
339 timer->oldReload = timer->reload;
340
341 if (timer->doIrq) {
342 GBARaiseIRQ(gba, IRQ_TIMER2);
343 }
344
345 if (timer->countUp) {
346 timer->nextEvent = INT_MAX;
347 }
348
349 nextTimer = &gba->timers[3];
350 if (nextTimer->countUp) {
351 ++gba->memory.io[REG_TM3CNT_LO >> 1];
352 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
353 nextTimer->nextEvent = 0;
354 }
355 }
356 }
357 if (timer->nextEvent < nextEvent) {
358 nextEvent = timer->nextEvent;
359 }
360 }
361
362 timer = &gba->timers[3];
363 if (timer->enable) {
364 timer->nextEvent -= cycles;
365 timer->lastEvent -= cycles;
366 nextEvent = timer->nextEvent;
367 if (timer->nextEvent <= 0) {
368 timer->lastEvent = timer->nextEvent;
369 timer->nextEvent += timer->overflowInterval;
370 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
371 timer->oldReload = timer->reload;
372
373 if (timer->doIrq) {
374 GBARaiseIRQ(gba, IRQ_TIMER3);
375 }
376
377 if (timer->countUp) {
378 timer->nextEvent = INT_MAX;
379 }
380 }
381 if (timer->nextEvent < nextEvent) {
382 nextEvent = timer->nextEvent;
383 }
384 }
385 }
386 return nextEvent;
387}
388
389void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
390 gba->debugger = debugger;
391}
392
393void GBADetachDebugger(struct GBA* gba) {
394 gba->debugger = 0;
395}
396
397void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
398 gba->romVf = vf;
399 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
400 vf->seek(vf, 0, SEEK_SET);
401 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
402 gba->memory.rom = gba->pristineRom;
403 gba->activeFile = fname;
404 gba->memory.romSize = gba->pristineRomSize;
405 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
406 GBASavedataInit(&gba->memory.savedata, sav);
407 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
408 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
409 // TODO: error check
410}
411
412void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
413 gba->biosVf = vf;
414 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
415 gba->memory.fullBios = 1;
416 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
417 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
418 if (checksum == GBA_BIOS_CHECKSUM) {
419 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
420 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
421 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
422 } else {
423 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
424 }
425 gba->biosChecksum = checksum;
426 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
427 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
428 }
429 // TODO: error check
430}
431
432void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
433 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
434 if (!patchedSize) {
435 return;
436 }
437 gba->memory.rom = anonymousMemoryMap(patchedSize);
438 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
439 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
440 mappedMemoryFree(gba->memory.rom, patchedSize);
441 gba->memory.rom = gba->pristineRom;
442 return;
443 }
444 gba->memory.romSize = patchedSize;
445 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
446}
447
448void GBATimerUpdateRegister(struct GBA* gba, int timer) {
449 struct GBATimer* currentTimer = &gba->timers[timer];
450 if (currentTimer->enable && !currentTimer->countUp) {
451 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
452 }
453}
454
455void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
456 gba->timers[timer].reload = reload;
457}
458
459void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
460 struct GBATimer* currentTimer = &gba->timers[timer];
461 GBATimerUpdateRegister(gba, timer);
462
463 int oldPrescale = currentTimer->prescaleBits;
464 switch (control & 0x0003) {
465 case 0x0000:
466 currentTimer->prescaleBits = 0;
467 break;
468 case 0x0001:
469 currentTimer->prescaleBits = 6;
470 break;
471 case 0x0002:
472 currentTimer->prescaleBits = 8;
473 break;
474 case 0x0003:
475 currentTimer->prescaleBits = 10;
476 break;
477 }
478 currentTimer->countUp = !!(control & 0x0004);
479 currentTimer->doIrq = !!(control & 0x0040);
480 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
481 int wasEnabled = currentTimer->enable;
482 currentTimer->enable = !!(control & 0x0080);
483 if (!wasEnabled && currentTimer->enable) {
484 if (!currentTimer->countUp) {
485 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
486 } else {
487 currentTimer->nextEvent = INT_MAX;
488 }
489 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
490 currentTimer->oldReload = currentTimer->reload;
491 currentTimer->lastEvent = 0;
492 gba->timersEnabled |= 1 << timer;
493 } else if (wasEnabled && !currentTimer->enable) {
494 if (!currentTimer->countUp) {
495 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
496 }
497 gba->timersEnabled &= ~(1 << timer);
498 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
499 // FIXME: this might be before present
500 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
501 }
502
503 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
504 gba->cpu->nextEvent = currentTimer->nextEvent;
505 }
506};
507
508void GBAWriteIE(struct GBA* gba, uint16_t value) {
509 if (value & (1 << IRQ_KEYPAD)) {
510 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
511 }
512
513 if (value & (1 << IRQ_GAMEPAK)) {
514 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
515 }
516
517 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
518 ARMRaiseIRQ(gba->cpu);
519 }
520}
521
522void GBAWriteIME(struct GBA* gba, uint16_t value) {
523 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
524 ARMRaiseIRQ(gba->cpu);
525 }
526}
527
528void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
529 gba->memory.io[REG_IF >> 1] |= 1 << irq;
530 gba->cpu->halted = 0;
531
532 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
533 ARMRaiseIRQ(gba->cpu);
534 }
535}
536
537void GBATestIRQ(struct ARMCore* cpu) {
538 struct GBA* gba = (struct GBA*) cpu->master;
539 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
540 gba->springIRQ = 1;
541 gba->cpu->nextEvent = 0;
542 }
543}
544
545void GBAHalt(struct GBA* gba) {
546 gba->cpu->nextEvent = 0;
547 gba->cpu->halted = 1;
548}
549
550static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
551 struct GBAThread* threadContext = GBAThreadGetContext();
552 if (threadContext) {
553 if (!gba) {
554 gba = threadContext->gba;
555 }
556 if (threadContext->logHandler) {
557 threadContext->logHandler(threadContext, level, format, args);
558 return;
559 }
560 }
561
562 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
563 return;
564 }
565
566 vprintf(format, args);
567 printf("\n");
568
569 if (level == GBA_LOG_FATAL) {
570 abort();
571 }
572}
573
574void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
575 va_list args;
576 va_start(args, format);
577 _GBAVLog(gba, level, format, args);
578 va_end(args);
579}
580
581void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
582 struct GBA* gba = 0;
583 if (debugger->cpu) {
584 gba = (struct GBA*) debugger->cpu->master;
585 }
586
587 enum GBALogLevel gbaLevel;
588 switch (level) {
589 default: // Avoids compiler warning
590 case DEBUGGER_LOG_DEBUG:
591 gbaLevel = GBA_LOG_DEBUG;
592 break;
593 case DEBUGGER_LOG_INFO:
594 gbaLevel = GBA_LOG_INFO;
595 break;
596 case DEBUGGER_LOG_WARN:
597 gbaLevel = GBA_LOG_WARN;
598 break;
599 case DEBUGGER_LOG_ERROR:
600 gbaLevel = GBA_LOG_ERROR;
601 break;
602 }
603 va_list args;
604 va_start(args, format);
605 _GBAVLog(gba, gbaLevel, format, args);
606 va_end(args);
607}
608
609bool GBAIsROM(struct VFile* vf) {
610 if (vf->seek(vf, 4, SEEK_SET) < 0) {
611 return false;
612 }
613 uint64_t signature;
614 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
615 return false;
616 }
617 return signature == GBA_ROM_MAGIC;
618}
619
620void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
621 struct GBA* gba = (struct GBA*) cpu->master;
622 enum GBALogLevel level = GBA_LOG_FATAL;
623 if (gba->debugger) {
624 level = GBA_LOG_STUB;
625 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
626 }
627 GBALog(gba, level, "Stub opcode: %08x", opcode);
628}
629
630void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
631 struct GBA* gba = (struct GBA*) cpu->master;
632 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
633 if (gba->debugger) {
634 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
635 }
636}
637
638void _checkOverrides(struct GBA* gba, uint32_t id) {
639 int i;
640 gba->busyLoop = -1;
641 for (i = 0; _overrides[i].id[0]; ++i) {
642 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
643 if (*overrideId == id) {
644 switch (_overrides[i].type) {
645 case SAVEDATA_FLASH512:
646 case SAVEDATA_FLASH1M:
647 gba->memory.savedata.type = _overrides[i].type;
648 GBASavedataInitFlash(&gba->memory.savedata);
649 break;
650 case SAVEDATA_EEPROM:
651 GBASavedataInitEEPROM(&gba->memory.savedata);
652 break;
653 case SAVEDATA_SRAM:
654 GBASavedataInitSRAM(&gba->memory.savedata);
655 break;
656 case SAVEDATA_NONE:
657 break;
658 }
659
660 if (_overrides[i].gpio & GPIO_RTC) {
661 GBAGPIOInitRTC(&gba->memory.gpio);
662 }
663
664 if (_overrides[i].gpio & GPIO_GYRO) {
665 GBAGPIOInitGyro(&gba->memory.gpio);
666 }
667
668 if (_overrides[i].gpio & GPIO_RUMBLE) {
669 GBAGPIOInitRumble(&gba->memory.gpio);
670 }
671
672 gba->busyLoop = _overrides[i].busyLoop;
673 return;
674 }
675 }
676}