| wdenk | a1e329b | 2002-01-26 00:07:42 +0000 | [diff] [blame^] | 1 | |
| 2 | /* Defines for NAND Flash Translation Layer */ |
| 3 | /* (c) 1999 Machine Vision Holdings, Inc. */ |
| 4 | /* Author: David Woodhouse <dwmw2@mvhi.com> */ |
| 5 | /* $Id: nftl.h,v 1.10 2000/12/29 00:25:38 dwmw2 Exp $ */ |
| 6 | |
| 7 | #ifndef __MTD_NFTL_H__ |
| 8 | #define __MTD_NFTL_H__ |
| 9 | |
| 10 | /* Block Control Information */ |
| 11 | |
| 12 | struct nftl_bci { |
| 13 | unsigned char ECCSig[6]; |
| 14 | __u8 Status; |
| 15 | __u8 Status1; |
| 16 | }__attribute__((packed)); |
| 17 | |
| 18 | /* Unit Control Information */ |
| 19 | |
| 20 | struct nftl_uci0 { |
| 21 | __u16 VirtUnitNum; |
| 22 | __u16 ReplUnitNum; |
| 23 | __u16 SpareVirtUnitNum; |
| 24 | __u16 SpareReplUnitNum; |
| 25 | } __attribute__((packed)); |
| 26 | |
| 27 | struct nftl_uci1 { |
| 28 | __u32 WearInfo; |
| 29 | __u16 EraseMark; |
| 30 | __u16 EraseMark1; |
| 31 | } __attribute__((packed)); |
| 32 | |
| 33 | struct nftl_uci2 { |
| 34 | __u16 FoldMark; |
| 35 | __u16 FoldMark1; |
| 36 | __u32 unused; |
| 37 | } __attribute__((packed)); |
| 38 | |
| 39 | union nftl_uci { |
| 40 | struct nftl_uci0 a; |
| 41 | struct nftl_uci1 b; |
| 42 | struct nftl_uci2 c; |
| 43 | }; |
| 44 | |
| 45 | struct nftl_oob { |
| 46 | struct nftl_bci b; |
| 47 | union nftl_uci u; |
| 48 | }; |
| 49 | |
| 50 | /* NFTL Media Header */ |
| 51 | |
| 52 | struct NFTLMediaHeader { |
| 53 | char DataOrgID[6]; |
| 54 | __u16 NumEraseUnits; |
| 55 | __u16 FirstPhysicalEUN; |
| 56 | __u32 FormattedSize; |
| 57 | unsigned char UnitSizeFactor; |
| 58 | } __attribute__((packed)); |
| 59 | |
| 60 | #define MAX_ERASE_ZONES (8192 - 512) |
| 61 | |
| 62 | #define ERASE_MARK 0x3c69 |
| 63 | #define SECTOR_FREE 0xff |
| 64 | #define SECTOR_USED 0x55 |
| 65 | #define SECTOR_IGNORE 0x11 |
| 66 | #define SECTOR_DELETED 0x00 |
| 67 | |
| 68 | #define FOLD_MARK_IN_PROGRESS 0x5555 |
| 69 | |
| 70 | #define ZONE_GOOD 0xff |
| 71 | #define ZONE_BAD_ORIGINAL 0 |
| 72 | #define ZONE_BAD_MARKED 7 |
| 73 | |
| 74 | /* these info are used in ReplUnitTable */ |
| 75 | #define BLOCK_NIL 0xffff /* last block of a chain */ |
| 76 | #define BLOCK_FREE 0xfffe /* free block */ |
| 77 | #define BLOCK_NOTEXPLORED 0xfffd /* non explored block, only used during mounting */ |
| 78 | #define BLOCK_RESERVED 0xfffc /* bios block or bad block */ |
| 79 | |
| 80 | struct NFTLrecord { |
| 81 | struct DiskOnChip *mtd; |
| 82 | __u16 MediaUnit, SpareMediaUnit; |
| 83 | __u32 EraseSize; |
| 84 | struct NFTLMediaHeader MediaHdr; |
| 85 | int usecount; |
| 86 | unsigned char heads; |
| 87 | unsigned char sectors; |
| 88 | unsigned short cylinders; |
| 89 | __u16 numvunits; |
| 90 | __u16 lastEUN; /* should be suppressed */ |
| 91 | __u16 numfreeEUNs; |
| 92 | __u16 LastFreeEUN; /* To speed up finding a free EUN */ |
| 93 | __u32 long nr_sects; |
| 94 | int head,sect,cyl; |
| 95 | __u16 *EUNtable; /* [numvunits]: First EUN for each virtual unit */ |
| 96 | __u16 *ReplUnitTable; /* [numEUNs]: ReplUnitNumber for each */ |
| 97 | unsigned int nb_blocks; /* number of physical blocks */ |
| 98 | unsigned int nb_boot_blocks; /* number of blocks used by the bios */ |
| 99 | }; |
| 100 | |
| 101 | #define MAX_NFTLS 16 |
| 102 | #define MAX_SECTORS_PER_UNIT 32 |
| 103 | #define NFTL_PARTN_BITS 4 |
| 104 | |
| 105 | #endif /* __MTD_NFTL_H__ */ |