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
 9enum GBAIRQ {
10	IRQ_VBLANK = 0x0,
11	IRQ_HBLANK = 0x1,
12	IRQ_VCOUNTER = 0x2,
13	IRQ_TIMER0 = 0x3,
14	IRQ_TIMER1 = 0x4,
15	IRQ_TIMER2 = 0x5,
16	IRQ_TIMER3 = 0x6,
17	IRQ_SIO = 0x7,
18	IRQ_DMA0 = 0x8,
19	IRQ_DMA1 = 0x9,
20	IRQ_DMA2 = 0xA,
21	IRQ_DMA3 = 0xB,
22	IRQ_KEYPAD = 0xC,
23	IRQ_GAMEPAK = 0xD
24};
25
26enum GBAError {
27	GBA_NO_ERROR = 0,
28	GBA_OUT_OF_MEMORY = -1
29};
30
31enum GBALogLevel {
32	GBA_LOG_STUB,
33	GBA_LOG_WARN
34};
35
36struct GBABoard {
37	struct ARMBoard d;
38	struct GBA* p;
39};
40
41struct GBA {
42	struct ARMCore cpu;
43	struct GBABoard board;
44	struct GBAMemory memory;
45	struct GBAVideo video;
46
47	struct ARMDebugger* debugger;
48
49	int timersEnabled;
50	struct GBATimer {
51		uint16_t reload;
52		uint16_t oldReload;
53		int32_t lastEvent;
54		int32_t nextEvent;
55		int32_t overflowInterval;
56		unsigned prescaleBits : 4;
57		unsigned countUp : 1;
58		unsigned doIrq : 1;
59		unsigned enable : 1;
60	} timers[4];
61
62	int springIRQ;
63
64	enum GBAError errno;
65	const char* errstr;
66};
67
68void GBAInit(struct GBA* gba);
69void GBADeinit(struct GBA* gba);
70
71void GBAMemoryInit(struct GBAMemory* memory);
72void GBAMemoryDeinit(struct GBAMemory* memory);
73
74void GBABoardInit(struct GBABoard* board);
75void GBABoardReset(struct ARMBoard* board);
76
77void GBATimerUpdateRegister(struct GBA* gba, int timer);
78void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t value);
79void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t value);
80
81void GBAWriteIE(struct GBA* gba, uint16_t value);
82void GBAWriteIME(struct GBA* gba, uint16_t value);
83void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq);
84int GBATestIRQ(struct GBA* gba);
85int GBAWaitForIRQ(struct GBA* gba);
86int GBAHalt(struct GBA* gba);
87
88void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger);
89
90void GBALoadROM(struct GBA* gba, int fd);
91
92void GBALog(int level, const char* format, ...);
93
94#endif