1/* Copyright (c) 2013-2016 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#ifndef GBA_H
  7#define GBA_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/core/log.h>
 14#include <mgba/core/timing.h>
 15
 16#include <mgba/internal/gba/memory.h>
 17#include <mgba/internal/gba/video.h>
 18#include <mgba/internal/gba/audio.h>
 19#include <mgba/internal/gba/sio.h>
 20#include <mgba/internal/gba/timer.h>
 21
 22#define GBA_ARM7TDMI_FREQUENCY 0x1000000U
 23
 24enum GBAIRQ {
 25	IRQ_VBLANK = 0x0,
 26	IRQ_HBLANK = 0x1,
 27	IRQ_VCOUNTER = 0x2,
 28	IRQ_TIMER0 = 0x3,
 29	IRQ_TIMER1 = 0x4,
 30	IRQ_TIMER2 = 0x5,
 31	IRQ_TIMER3 = 0x6,
 32	IRQ_SIO = 0x7,
 33	IRQ_DMA0 = 0x8,
 34	IRQ_DMA1 = 0x9,
 35	IRQ_DMA2 = 0xA,
 36	IRQ_DMA3 = 0xB,
 37	IRQ_KEYPAD = 0xC,
 38	IRQ_GAMEPAK = 0xD
 39};
 40
 41enum GBAIdleLoopOptimization {
 42	IDLE_LOOP_IGNORE = -1,
 43	IDLE_LOOP_REMOVE = 0,
 44	IDLE_LOOP_DETECT
 45};
 46
 47enum {
 48	SP_BASE_SYSTEM = 0x03007F00,
 49	SP_BASE_IRQ = 0x03007FA0,
 50	SP_BASE_SUPERVISOR = 0x03007FE0
 51};
 52
 53struct ARMCore;
 54struct GBA;
 55struct Patch;
 56struct VFile;
 57
 58mLOG_DECLARE_CATEGORY(GBA);
 59mLOG_DECLARE_CATEGORY(GBA_DEBUG);
 60
 61DECL_BITFIELD(GBADebugFlags, uint16_t);
 62DECL_BITS(GBADebugFlags, Level, 0, 3);
 63DECL_BIT(GBADebugFlags, Send, 8);
 64
 65struct GBA {
 66	struct mCPUComponent d;
 67
 68	struct ARMCore* cpu;
 69	struct GBAMemory memory;
 70	struct GBAVideo video;
 71	struct GBAAudio audio;
 72	struct GBASIO sio;
 73
 74	struct mCoreSync* sync;
 75	struct mTiming timing;
 76
 77	struct ARMDebugger* debugger;
 78
 79	uint32_t bus;
 80	int performingDMA;
 81
 82	struct GBATimer timers[4];
 83
 84	int springIRQ;
 85	struct mTimingEvent irqEvent;
 86
 87	uint32_t biosChecksum;
 88	int* keySource;
 89	struct mRotationSource* rotationSource;
 90	struct GBALuminanceSource* luminanceSource;
 91	struct mRTCSource* rtcSource;
 92	struct mRumble* rumble;
 93
 94	struct GBARRContext* rr;
 95	bool isPristine;
 96	size_t pristineRomSize;
 97	size_t yankedRomSize;
 98	uint32_t romCrc32;
 99	struct VFile* romVf;
100	struct VFile* biosVf;
101
102	struct mAVStream* stream;
103	struct mKeyCallback* keyCallback;
104	struct mCoreCallbacksList coreCallbacks;
105
106	enum GBAIdleLoopOptimization idleOptimization;
107	uint32_t idleLoop;
108	uint32_t lastJump;
109	bool haltPending;
110	bool cpuBlocked;
111	bool earlyExit;
112	uint32_t dmaPC;
113	int idleDetectionStep;
114	int idleDetectionFailures;
115	int32_t cachedRegisters[16];
116	bool taintedRegisters[16];
117
118	bool hardCrash;
119	bool allowOpposingDirections;
120
121	bool debug;
122	char debugString[0x100];
123	GBADebugFlags debugFlags;
124};
125
126struct GBACartridge {
127	uint32_t entry;
128	uint8_t logo[156];
129	char title[12];
130	uint32_t id;
131	uint16_t maker;
132	uint8_t type;
133	uint8_t unit;
134	uint8_t device;
135	uint8_t reserved[7];
136	uint8_t version;
137	uint8_t checksum;
138	// And ROM data...
139};
140
141void GBACreate(struct GBA* gba);
142void GBADestroy(struct GBA* gba);
143
144void GBAReset(struct ARMCore* cpu);
145void GBASkipBIOS(struct GBA* gba);
146
147void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq, uint32_t cyclesLate);
148void GBATestIRQ(struct GBA* gba, uint32_t cyclesLate);
149void GBAHalt(struct GBA* gba);
150void GBAStop(struct GBA* gba);
151void GBADebug(struct GBA* gba, uint16_t value);
152
153#ifdef USE_DEBUGGERS
154struct mDebugger;
155void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger);
156void GBADetachDebugger(struct GBA* gba);
157#endif
158
159void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode,
160                      uint32_t* opcode);
161void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
162
163bool GBALoadROM(struct GBA* gba, struct VFile* vf);
164bool GBALoadSave(struct GBA* gba, struct VFile* sav);
165void GBAYankROM(struct GBA* gba);
166void GBAUnloadROM(struct GBA* gba);
167void GBALoadBIOS(struct GBA* gba, struct VFile* vf);
168void GBAApplyPatch(struct GBA* gba, struct Patch* patch);
169
170bool GBALoadMB(struct GBA* gba, struct VFile* vf);
171bool GBALoadNull(struct GBA* gba);
172
173void GBAGetGameCode(const struct GBA* gba, char* out);
174void GBAGetGameTitle(const struct GBA* gba, char* out);
175
176void GBATestKeypadIRQ(struct GBA* gba);
177
178void GBAFrameStarted(struct GBA* gba);
179void GBAFrameEnded(struct GBA* gba);
180
181CXX_GUARD_END
182
183#endif