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	uint32_t biosChecksum;
 86	int* keySource;
 87	struct mRotationSource* rotationSource;
 88	struct GBALuminanceSource* luminanceSource;
 89	struct mRTCSource* rtcSource;
 90	struct mRumble* rumble;
 91
 92	struct GBARRContext* rr;
 93	bool isPristine;
 94	size_t pristineRomSize;
 95	size_t yankedRomSize;
 96	uint32_t romCrc32;
 97	struct VFile* romVf;
 98	struct VFile* biosVf;
 99
100	struct mAVStream* stream;
101	struct mKeyCallback* keyCallback;
102	struct mCoreCallbacksList coreCallbacks;
103
104	enum GBAIdleLoopOptimization idleOptimization;
105	uint32_t idleLoop;
106	uint32_t lastJump;
107	bool haltPending;
108	bool cpuBlocked;
109	bool earlyExit;
110	int idleDetectionStep;
111	int idleDetectionFailures;
112	int32_t cachedRegisters[16];
113	bool taintedRegisters[16];
114
115	bool hardCrash;
116	bool allowOpposingDirections;
117
118	bool debug;
119	char debugString[0x100];
120	GBADebugFlags debugFlags;
121};
122
123struct GBACartridge {
124	uint32_t entry;
125	uint8_t logo[156];
126	char title[12];
127	uint32_t id;
128	uint16_t maker;
129	uint8_t type;
130	uint8_t unit;
131	uint8_t device;
132	uint8_t reserved[7];
133	uint8_t version;
134	uint8_t checksum;
135	// And ROM data...
136};
137
138void GBACreate(struct GBA* gba);
139void GBADestroy(struct GBA* gba);
140
141void GBAReset(struct ARMCore* cpu);
142void GBASkipBIOS(struct GBA* gba);
143
144void GBAWriteIE(struct GBA* gba, uint16_t value);
145void GBAWriteIME(struct GBA* gba, uint16_t value);
146void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq);
147void GBATestIRQ(struct ARMCore* cpu);
148void GBAHalt(struct GBA* gba);
149void GBAStop(struct GBA* gba);
150void GBADebug(struct GBA* gba, uint16_t value);
151
152#ifdef USE_DEBUGGERS
153struct mDebugger;
154void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger);
155void GBADetachDebugger(struct GBA* gba);
156#endif
157
158void GBASetBreakpoint(struct GBA* gba, struct mCPUComponent* component, uint32_t address, enum ExecutionMode mode,
159                      uint32_t* opcode);
160void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
161
162bool GBALoadROM(struct GBA* gba, struct VFile* vf);
163bool GBALoadSave(struct GBA* gba, struct VFile* sav);
164void GBAYankROM(struct GBA* gba);
165void GBAUnloadROM(struct GBA* gba);
166void GBALoadBIOS(struct GBA* gba, struct VFile* vf);
167void GBAApplyPatch(struct GBA* gba, struct Patch* patch);
168
169bool GBALoadMB(struct GBA* gba, struct VFile* vf);
170bool GBALoadNull(struct GBA* gba);
171
172bool GBAIsROM(struct VFile* vf);
173bool GBAIsMB(struct VFile* vf);
174bool GBAIsBIOS(struct VFile* vf);
175void GBAGetGameCode(const struct GBA* gba, char* out);
176void GBAGetGameTitle(const struct GBA* gba, char* out);
177
178void GBATestKeypadIRQ(struct GBA* gba);
179
180void GBAFrameStarted(struct GBA* gba);
181void GBAFrameEnded(struct GBA* gba);
182
183CXX_GUARD_END
184
185#endif