- /* Defines for NAND Flash Translation Layer */
- /* (c) 1999 Machine Vision Holdings, Inc. */
- /* Author: David Woodhouse <dwmw2@mvhi.com> */
- /* $Id: nftl.h,v 1.10 2000/12/29 00:25:38 dwmw2 Exp $ */
- #ifndef __MTD_NFTL_H__
- #define __MTD_NFTL_H__
- #ifndef __BOOT__
- #include <linux/mtd/mtd.h>
- #endif
- /* Block Control Information */
- struct nftl_bci {
- unsigned char ECCSig[6];
- __u8 Status;
- __u8 Status1;
- }__attribute__((packed));
- /* Unit Control Information */
- struct nftl_uci0 {
- __u16 VirtUnitNum;
- __u16 ReplUnitNum;
- __u16 SpareVirtUnitNum;
- __u16 SpareReplUnitNum;
- } __attribute__((packed));
- struct nftl_uci1 {
- __u32 WearInfo;
- __u16 EraseMark;
- __u16 EraseMark1;
- } __attribute__((packed));
- struct nftl_uci2 {
- __u16 FoldMark;
- __u16 FoldMark1;
- __u32 unused;
- } __attribute__((packed));
- union nftl_uci {
- struct nftl_uci0 a;
- struct nftl_uci1 b;
- struct nftl_uci2 c;
- };
- struct nftl_oob {
- struct nftl_bci b;
- union nftl_uci u;
- };
- /* NFTL Media Header */
- struct NFTLMediaHeader {
- char DataOrgID[6];
- __u16 NumEraseUnits;
- __u16 FirstPhysicalEUN;
- __u32 FormattedSize;
- unsigned char UnitSizeFactor;
- } __attribute__((packed));
- #define MAX_ERASE_ZONES (8192 - 512)
- #define ERASE_MARK 0x3c69
- #define SECTOR_FREE 0xff
- #define SECTOR_USED 0x55
- #define SECTOR_IGNORE 0x11
- #define SECTOR_DELETED 0x00
- #define FOLD_MARK_IN_PROGRESS 0x5555
- #define ZONE_GOOD 0xff
- #define ZONE_BAD_ORIGINAL 0
- #define ZONE_BAD_MARKED 7
- #ifdef __KERNEL__
- /* these info are used in ReplUnitTable */
- #define BLOCK_NIL 0xffff /* last block of a chain */
- #define BLOCK_FREE 0xfffe /* free block */
- #define BLOCK_NOTEXPLORED 0xfffd /* non explored block, only used during mounting */
- #define BLOCK_RESERVED 0xfffc /* bios block or bad block */
- struct NFTLrecord {
- struct mtd_info *mtd;
- struct semaphore mutex;
- __u16 MediaUnit, SpareMediaUnit;
- __u32 EraseSize;
- struct NFTLMediaHeader MediaHdr;
- int usecount;
- unsigned char heads;
- unsigned char sectors;
- unsigned short cylinders;
- __u16 numvunits;
- __u16 lastEUN; /* should be suppressed */
- __u16 numfreeEUNs;
- __u16 LastFreeEUN; /* To speed up finding a free EUN */
- __u32 nr_sects;
- int head,sect,cyl;
- __u16 *EUNtable; /* [numvunits]: First EUN for each virtual unit */
- __u16 *ReplUnitTable; /* [numEUNs]: ReplUnitNumber for each */
- unsigned int nb_blocks; /* number of physical blocks */
- unsigned int nb_boot_blocks; /* number of blocks used by the bios */
- struct erase_info instr;
- };
- int NFTL_mount(struct NFTLrecord *s);
- int NFTL_formatblock(struct NFTLrecord *s, int block);
- #ifndef NFTL_MAJOR
- #define NFTL_MAJOR 93
- #endif
- #define MAX_NFTLS 16
- #define MAX_SECTORS_PER_UNIT 32
- #define NFTL_PARTN_BITS 4
- #endif /* __KERNEL__ */
- #endif /* __MTD_NFTL_H__ */