include/gba/flash_internal.h


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#ifndef GUARD_GBA_FLASH_INTERNAL_H
#define GUARD_GBA_FLASH_INTERNAL_H

#include "types.h"

#define FLASH_BASE ((u8*)0xE000000)

#define FLASH_WRITE(addr, data) ((*(vu8*)(FLASH_BASE + (addr))) = (data))

#define FLASH_ROM_SIZE_1M 131072 // 1 megabit ROM

#define SECTORS_PER_BANK 16

struct FlashSector {
    u32 size;
    u8 shift;
    u16 count;
    u16 top;
};

struct FlashType {
    u32 romSize;
    struct FlashSector sector;
    u16 wait[2]; // game pak bus read/write wait

    // TODO: add support for anonymous unions/structs if possible
    union {
        struct {
            u8 makerId;
            u8 deviceId;
        } separate;
        u16 joined;
    } ids;
};

struct FlashSetupInfo {
    u16 (*programFlashByte)(u16, u32, u8);
    u16 (*programFlashSector)(u16, void*);
    u16 (*eraseFlashChip)(void);
    u16 (*eraseFlashSector)(u16);
    u16 (*WaitForFlashWrite)(u8, u8*, u8);
    const u16* maxTime;
    struct FlashType type;
};

#endif // GUARD_GBA_FLASH_INTERNAL_H