YAWM-ModMii-Edition/source/mini_seeprom.h
2024-03-22 23:43:32 -05:00

60 lines
1.6 KiB
C

/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
SEEPROM support
Copyright (C) 2008, 2009 Sven Peter <svenpeter@gmail.com>
# This code is licensed to you under the terms of the GNU GPL, version 2;
# see http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#ifndef __MINI_SEEPROM_H__
#define __MINI_SEEPROM_H__
#define SEEPROM_SIZE 0x100
typedef struct
{
union {
struct {
u8 boot2version;
u8 unknown1;
u8 unknown2;
u8 pad;
u32 update_tag;
};
u8 data[8];
};
u16 checksum; // sum of data[] elements?
} __attribute__((packed)) eep_boot2_ctr_t;
typedef struct
{
union {
u32 nand_gen; // matches offset 0x8 in nand SFFS blocks
u8 data[4];
};
u16 checksum; // sum of data[] elements?
} __attribute__((packed)) eep_nand_ctr_t;
struct SEEPROM
{
u32 ms_id; // 0x00000002
u32 ca_id; // 0x00000001
u32 ng_key_id;
u8 ng_sig[60];
eep_boot2_ctr_t boot2_counters[2];
eep_nand_ctr_t nand_counters[3]; // current slot rotates on each write
u8 pad0[6];
u8 korean_key[16];
u8 pad1[116];
u16 prng_seed[2]; // u32 with lo word stored first, incremented every time IOS starts. Used with the PRNG key to setup IOS's PRNG (syscalls 73/74 etc.)
u8 pad2[4];
};
_Static_assert(sizeof(struct SEEPROM) == SEEPROM_SIZE, "SEEPROM struct size incorrect!");
u16 seeprom_read(void *dst, u16 offset, u16 size);
// u16 seeprom_write(const void *src, u16 offset, u16 size);
#endif /* __MINI_SEEPROM_H__ */