1#ifndef GBA_MEMORY_H
  2#define GBA_MEMORY_H
  3
  4#include "arm.h"
  5
  6enum GBAError {
  7	GBA_NO_ERROR = 0,
  8	GBA_OUT_OF_MEMORY = -1
  9};
 10
 11enum GBAMemoryRegion {
 12	REGION_BIOS = 0x0,
 13	REGION_WORKING_RAM = 0x2,
 14	REGION_WORKING_IRAM = 0x3,
 15	REGION_IO = 0x4,
 16	REGION_PALETTE_RAM = 0x5,
 17	REGION_VRAM = 0x6,
 18	REGION_OAM = 0x7,
 19	REGION_CART0 = 0x8,
 20	REGION_CART0_EX = 0x9,
 21	REGION_CART1 = 0xA,
 22	REGION_CART1_EX = 0xB,
 23	REGION_CART2 = 0xC,
 24	REGION_CART2_EX = 0xD,
 25	REGION_CART_SRAM = 0xE
 26};
 27
 28enum GBAMemoryBase {
 29	BASE_BIOS = 0x00000000,
 30	BASE_WORKING_RAM = 0x02000000,
 31	BASE_WORKING_IRAM = 0x03000000,
 32	BASE_IO = 0x04000000,
 33	BASE_PALETTE_RAM = 0x05000000,
 34	BASE_VRAM = 0x06000000,
 35	BASE_OAM = 0x07000000,
 36	BASE_CART0 = 0x08000000,
 37	BASE_CART0_EX = 0x09000000,
 38	BASE_CART1 = 0x0A000000,
 39	BASE_CART1_EX = 0x0B000000,
 40	BASE_CART2 = 0x0C000000,
 41	BASE_CART2_EX = 0x0D000000,
 42	BASE_CART_SRAM = 0x0E000000
 43};
 44
 45enum {
 46	SIZE_BIOS = 0x00004000,
 47	SIZE_WORKING_RAM = 0x00040000,
 48	SIZE_WORKING_IRAM = 0x00008000,
 49	SIZE_IO = 0x00000400,
 50	SIZE_PALETTE_RAM = 0x00000400,
 51	SIZE_VRAM = 0x00018000,
 52	SIZE_OAM = 0x00000400,
 53	SIZE_CART0 = 0x02000000,
 54	SIZE_CART1 = 0x02000000,
 55	SIZE_CART2 = 0x02000000,
 56	SIZE_CART_SRAM = 0x00008000,
 57	SIZE_CART_FLASH512 = 0x00010000,
 58	SIZE_CART_FLASH1M = 0x00020000,
 59	SIZE_CART_EEPROM = 0x00002000
 60};
 61
 62enum {
 63	SP_BASE_SYSTEM = 0x03FFFF00,
 64	SP_BASE_IRQ = 0x03FFFFA0,
 65	SP_BASE_SUPERVISOR = 0x03FFFFE0
 66};
 67
 68enum {
 69	OFFSET_MASK = 0x00FFFFFF
 70};
 71
 72struct GBAMemory {
 73	struct ARMMemory d;
 74	struct GBA* p;
 75
 76	int32_t* bios;
 77	int32_t* wram;
 78	int32_t* iwram;
 79	int32_t* rom;
 80};
 81
 82struct GBABoard {
 83	struct ARMBoard d;
 84};
 85
 86struct GBA {
 87	struct ARMCore cpu;
 88	struct GBABoard board;
 89	struct GBAMemory memory;
 90
 91	enum GBAError errno;
 92	const char* errstr;
 93};
 94
 95void GBAInit(struct GBA* gba);
 96void GBADeinit(struct GBA* gba);
 97
 98void GBAMemoryInit(struct GBAMemory* memory);
 99void GBAMemoryDeinit(struct GBAMemory* memory);
100
101void GBABoardInit(struct GBABoard* board);
102void GBABoardReset(struct ARMBoard* board);
103
104void GBALoadROM(struct GBA* gba, int fd);
105
106int32_t GBALoad32(struct ARMMemory* memory, uint32_t address);
107int16_t GBALoad16(struct ARMMemory* memory, uint32_t address);
108uint16_t GBALoadU16(struct ARMMemory* memory, uint32_t address);
109int8_t GBALoad8(struct ARMMemory* memory, uint32_t address);
110uint8_t GBALoadU8(struct ARMMemory* memory, uint32_t address);
111
112void GBAStore32(struct ARMMemory* memory, uint32_t address, int32_t value);
113void GBAStore16(struct ARMMemory* memory, uint32_t address, int16_t value);
114void GBAStore8(struct ARMMemory* memory, uint32_t address, int8_t value);
115
116#endif