1 /* 2 * ftl.h 1.5 1999/07/20 16:07:58 3 * 4 * The contents of this file are subject to the Mozilla Public License 5 * Version 1.1 (the "License"); you may not use this file except in 6 * compliance with the License. You may obtain a copy of the License 7 * at http://www.mozilla.org/MPL/ 8 * 9 * Software distributed under the License is distributed on an "AS IS" 10 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 11 * the License for the specific language governing rights and 12 * limitations under the License. 13 * 14 * The initial developer of the original code is David A. Hinds 15 * <dhinds@hyper.stanford.edu>. Portions created by David A. Hinds 16 * are Copyright (C) 1998 David A. Hinds. All Rights Reserved. 17 */ 18 19 #ifndef _LINUX_FTL_H 20 #define _LINUX_FTL_H 21 22 typedef struct erase_unit_header_t { 23 u_char LinkTargetTuple[5]; 24 u_char DataOrgTuple[10]; 25 u_char NumTransferUnits; 26 u_int EraseCount; 27 u_short LogicalEUN; 28 u_char BlockSize; 29 u_char EraseUnitSize; 30 u_short FirstPhysicalEUN; 31 u_short NumEraseUnits; 32 u_int FormattedSize; 33 u_int FirstVMAddress; 34 u_short NumVMPages; 35 u_char Flags; 36 u_char Code; 37 u_int SerialNumber; 38 u_int AltEUHOffset; 39 u_int BAMOffset; 40 u_char Reserved[12]; 41 u_char EndTuple[2]; 42 } erase_unit_header_t; 43 44 /* Flags in erase_unit_header_t */ 45 #define HIDDEN_AREA 0x01 46 #define REVERSE_POLARITY 0x02 47 #define DOUBLE_BAI 0x04 48 49 /* Definitions for block allocation information */ 50 51 #define BLOCK_FREE(b) ((b) == 0xffffffff) 52 #define BLOCK_DELETED(b) (((b) == 0) || ((b) == 0xfffffffe)) 53 54 #define BLOCK_TYPE(b) ((b) & 0x7f) 55 #define BLOCK_ADDRESS(b) ((b) & ~0x7f) 56 #define BLOCK_NUMBER(b) ((b) >> 9) 57 #define BLOCK_CONTROL 0x30 58 #define BLOCK_DATA 0x40 59 #define BLOCK_REPLACEMENT 0x60 60 #define BLOCK_BAD 0x70 61 62 #endif /* _LINUX_FTL_H */ 63