include/linux/mtd/ftl.h

   1 /*
   2  * Derived from (and probably identical to):
   3  * ftl.h 1.7 1999/10/25 20:23:17
   4  *
   5  * The contents of this file are subject to the Mozilla Public License
   6  * Version 1.1 (the "License"); you may not use this file except in
   7  * compliance with the License. You may obtain a copy of the License
   8  * at http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS"
  11  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  12  * the License for the specific language governing rights and
  13  * limitations under the License.
  14  *
  15  * The initial developer of the original code is David A. Hinds
  16  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  17  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  18  *
  19  * Alternatively, the contents of this file may be used under the
  20  * terms of the GNU General Public License version 2 (the "GPL"), in
  21  * which case the provisions of the GPL are applicable instead of the
  22  * above.  If you wish to allow the use of your version of this file
  23  * only under the terms of the GPL and not to allow others to use
  24  * your version of this file under the MPL, indicate your decision by
  25  * deleting the provisions above and replace them with the notice and
  26  * other provisions required by the GPL.  If you do not delete the
  27  * provisions above, a recipient may use your version of this file
  28  * under either the MPL or the GPL.
  29  */
  30
  31 #ifndef _LINUX_FTL_H
  32 #define _LINUX_FTL_H
  33
  34 typedef struct erase_unit_header_t {
  35     uint8_t     LinkTargetTuple[5];
  36     uint8_t     DataOrgTuple[10];
  37     uint8_t     NumTransferUnits;
  38     uint32_t    EraseCount;
  39     uint16_t    LogicalEUN;
  40     uint8_t     BlockSize;
  41     uint8_t     EraseUnitSize;
  42     uint16_t    FirstPhysicalEUN;
  43     uint16_t    NumEraseUnits;
  44     uint32_t    FormattedSize;
  45     uint32_t    FirstVMAddress;
  46     uint16_t    NumVMPages;
  47     uint8_t     Flags;
  48     uint8_t     Code;
  49     uint32_t    SerialNumber;
  50     uint32_t    AltEUHOffset;
  51     uint32_t    BAMOffset;
  52     uint8_t     Reserved[12];
  53     uint8_t     EndTuple[2];
  54 } erase_unit_header_t;
  55
  56 /* Flags in erase_unit_header_t */
  57 #define HIDDEN_AREA             0x01
  58 #define REVERSE_POLARITY        0x02
  59 #define DOUBLE_BAI              0x04
  60
  61 /* Definitions for block allocation information */
  62
  63 #define BLOCK_FREE(b)           ((b) == 0xffffffff)
  64 #define BLOCK_DELETED(b)        (((b) == 0) || ((b) == 0xfffffffe))
  65
  66 #define BLOCK_TYPE(b)           ((b) & 0x7f)
  67 #define BLOCK_ADDRESS(b)        ((b) & ~0x7f)
  68 #define BLOCK_NUMBER(b)         ((b) >> 9)
  69 #define BLOCK_CONTROL           0x30
  70 #define BLOCK_DATA              0x40
  71 #define BLOCK_REPLACEMENT       0x60
  72 #define BLOCK_BAD               0x70
  73
  74 #endif /* _LINUX_FTL_H */