1#ifndef GBA_H
  2#define GBA_H
  3
  4#include "arm.h"
  5
  6#include "gba-memory.h"
  7#include "gba-video.h"
  8#include "gba-audio.h"
  9
 10#include <stdarg.h>
 11
 12extern const uint32_t GBA_ARM7TDMI_FREQUENCY;
 13
 14enum GBAIRQ {
 15	IRQ_VBLANK = 0x0,
 16	IRQ_HBLANK = 0x1,
 17	IRQ_VCOUNTER = 0x2,
 18	IRQ_TIMER0 = 0x3,
 19	IRQ_TIMER1 = 0x4,
 20	IRQ_TIMER2 = 0x5,
 21	IRQ_TIMER3 = 0x6,
 22	IRQ_SIO = 0x7,
 23	IRQ_DMA0 = 0x8,
 24	IRQ_DMA1 = 0x9,
 25	IRQ_DMA2 = 0xA,
 26	IRQ_DMA3 = 0xB,
 27	IRQ_KEYPAD = 0xC,
 28	IRQ_GAMEPAK = 0xD
 29};
 30
 31enum GBAError {
 32	GBA_NO_ERROR = 0,
 33	GBA_OUT_OF_MEMORY = -1
 34};
 35
 36enum GBALogLevel {
 37	GBA_LOG_STUB = 0x01,
 38	GBA_LOG_DEBUG = 0x02,
 39	GBA_LOG_INFO = 0x04,
 40	GBA_LOG_WARN = 0x08,
 41	GBA_LOG_ERROR = 0x10,
 42	GBA_LOG_FATAL = 0x20,
 43
 44	GBA_LOG_GAME_ERROR = 0x100
 45};
 46
 47enum GBAKey {
 48	GBA_KEY_A = 0,
 49	GBA_KEY_B = 1,
 50	GBA_KEY_SELECT = 2,
 51	GBA_KEY_START = 3,
 52	GBA_KEY_RIGHT = 4,
 53	GBA_KEY_LEFT = 5,
 54	GBA_KEY_UP = 6,
 55	GBA_KEY_DOWN = 7,
 56	GBA_KEY_R = 8,
 57	GBA_KEY_L = 9,
 58	GBA_KEY_NONE = -1
 59};
 60
 61struct GBARotationSource;
 62struct GBA;
 63typedef void (*GBALogHandler)(struct GBA*, enum GBALogLevel, const char* format, va_list args);
 64
 65struct GBABoard {
 66	struct ARMBoard d;
 67	struct GBA* p;
 68};
 69
 70struct GBA {
 71	struct ARMCore cpu;
 72	struct GBABoard board;
 73	struct GBAMemory memory;
 74	struct GBAVideo video;
 75	struct GBAAudio audio;
 76
 77	struct GBASync* sync;
 78
 79	struct ARMDebugger* debugger;
 80
 81	int timersEnabled;
 82	struct GBATimer {
 83		uint16_t reload;
 84		uint16_t oldReload;
 85		int32_t lastEvent;
 86		int32_t nextEvent;
 87		int32_t overflowInterval;
 88		unsigned prescaleBits : 4;
 89		unsigned countUp : 1;
 90		unsigned doIrq : 1;
 91		unsigned enable : 1;
 92	} timers[4];
 93
 94	int springIRQ;
 95	uint32_t biosChecksum;
 96	int* keySource;
 97	struct GBARotationSource* rotationSource;
 98	struct GBARumble* rumble;
 99
100	const char* activeFile;
101	const char* savefile;
102
103	int logLevel;
104	GBALogHandler logHandler;
105};
106
107struct GBACartridge {
108	uint32_t entry;
109	uint8_t logo[156];
110	char title[12];
111	uint32_t id;
112	uint16_t maker;
113	uint8_t type;
114	uint8_t unit;
115	uint8_t device;
116	uint8_t reserved[7];
117	uint8_t version;
118	uint8_t checksum;
119	// And ROM data...
120};
121
122void GBAInit(struct GBA* gba);
123void GBADeinit(struct GBA* gba);
124
125void GBAMemoryInit(struct GBAMemory* memory);
126void GBAMemoryDeinit(struct GBAMemory* memory);
127
128void GBABoardInit(struct GBABoard* board);
129void GBABoardReset(struct ARMBoard* board);
130
131void GBATimerUpdateRegister(struct GBA* gba, int timer);
132void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t value);
133void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t value);
134
135void GBAWriteIE(struct GBA* gba, uint16_t value);
136void GBAWriteIME(struct GBA* gba, uint16_t value);
137void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq);
138void GBATestIRQ(struct ARMBoard* board);
139int GBAWaitForIRQ(struct GBA* gba);
140int GBAHalt(struct GBA* gba);
141
142void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger);
143
144void GBALoadROM(struct GBA* gba, int fd, const char* fname);
145void GBALoadBIOS(struct GBA* gba, int fd);
146
147__attribute__((format (printf, 3, 4)))
148void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...);
149
150#endif