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