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64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#ifndef GUARD_SAVE_H
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#define GUARD_SAVE_H
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// Each 4 KiB flash sector contains 3968 bytes of actual data followed by a 128 byte footer.
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// Only 12 bytes of the footer are used.
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#define SECTOR_DATA_SIZE 3968
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#define SECTOR_FOOTER_SIZE 128
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#define SECTOR_SIZE (SECTOR_DATA_SIZE + SECTOR_FOOTER_SIZE)
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#define NUM_SAVE_SLOTS 2
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// If the sector's security field is not this value then the sector is either invalid or empty.
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#define SECTOR_SECURITY_NUM 0x8012025
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#define SECTOR_ID_SAVEBLOCK2 0
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#define SECTOR_ID_SAVEBLOCK1_START 1
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#define SECTOR_ID_SAVEBLOCK1_END 4
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#define NUM_SECTORS_PER_SLOT 14
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#define SECTORS_COUNT 32
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#define SAVE_STATUS_EMPTY 0
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#define SAVE_STATUS_OK 1
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#define SAVE_STATUS_CORRUPT 2
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#define SAVE_STATUS_NO_FLASH 4
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#define SAVE_STATUS_ERROR 0xFF
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// Special sector id value for certain save functions to
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// indicate that no specific sector should be used.
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#define FULL_SAVE_SLOT 0xFFFF
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enum
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{
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SECTOR_DAMAGED,
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SECTOR_OK,
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SECTOR_CHECK, // unused
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};
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struct SaveBlockChunk
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{
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u8 * data;
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u16 size;
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};
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struct SaveSector
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{
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u8 data[SECTOR_DATA_SIZE];
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u8 unused[SECTOR_FOOTER_SIZE - 12]; // Unused portion of the footer
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u16 id;
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u16 checksum;
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u32 security;
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u32 counter;
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}; // size is SECTOR_SIZE (0x1000)
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#define SECTOR_SECURITY_OFFSET offsetof(struct SaveSector, security)
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extern u32 gDamagedSaveSectors;
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extern bool32 gFlashIdentIsValid;
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extern const struct SaveBlockChunk gSaveBlockChunks[];
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u8 WriteSaveSectorOrSlot(u16 sectorId, const struct SaveBlockChunk *chunks);
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u8 TryLoadSaveSlot(u16 sectorId, const struct SaveBlockChunk *chunks);
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#endif //GUARD_SAVE_H
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