include/linux/mtd/ftl.h

   1 /*
   2  * $Id: ftl.h,v 1.6 2003/01/24 13:20:04 dwmw2 Exp $
   3  *
   4  * Derived from (and probably identical to):
   5  * ftl.h 1.7 1999/10/25 20:23:17
   6  *
   7  * The contents of this file are subject to the Mozilla Public License
   8  * Version 1.1 (the "License"); you may not use this file except in
   9  * compliance with the License. You may obtain a copy of the License
  10  * at http://www.mozilla.org/MPL/
  11  *
  12  * Software distributed under the License is distributed on an "AS IS"
  13  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  14  * the License for the specific language governing rights and
  15  * limitations under the License.
  16  *
  17  * The initial developer of the original code is David A. Hinds
  18  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  19  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  20  *
  21  * Alternatively, the contents of this file may be used under the
  22  * terms of the GNU General Public License version 2 (the "GPL"), in
  23  * which case the provisions of the GPL are applicable instead of the
  24  * above.  If you wish to allow the use of your version of this file
  25  * only under the terms of the GPL and not to allow others to use
  26  * your version of this file under the MPL, indicate your decision by
  27  * deleting the provisions above and replace them with the notice and
  28  * other provisions required by the GPL.  If you do not delete the
  29  * provisions above, a recipient may use your version of this file
  30  * under either the MPL or the GPL.
  31  */
  32
  33 #ifndef _LINUX_FTL_H
  34 #define _LINUX_FTL_H
  35
  36 typedef struct erase_unit_header_t {
  37     u_int8_t    LinkTargetTuple[5];
  38     u_int8_t    DataOrgTuple[10];
  39     u_int8_t    NumTransferUnits;
  40     u_int32_t   EraseCount;
  41     u_int16_t   LogicalEUN;
  42     u_int8_t    BlockSize;
  43     u_int8_t    EraseUnitSize;
  44     u_int16_t   FirstPhysicalEUN;
  45     u_int16_t   NumEraseUnits;
  46     u_int32_t   FormattedSize;
  47     u_int32_t   FirstVMAddress;
  48     u_int16_t   NumVMPages;
  49     u_int8_t    Flags;
  50     u_int8_t    Code;
  51     u_int32_t   SerialNumber;
  52     u_int32_t   AltEUHOffset;
  53     u_int32_t   BAMOffset;
  54     u_int8_t    Reserved[12];
  55     u_int8_t    EndTuple[2];
  56 } erase_unit_header_t;
  57
  58 /* Flags in erase_unit_header_t */
  59 #define HIDDEN_AREA             0x01
  60 #define REVERSE_POLARITY        0x02
  61 #define DOUBLE_BAI              0x04
  62
  63 /* Definitions for block allocation information */
  64
  65 #define BLOCK_FREE(b)           ((b) == 0xffffffff)
  66 #define BLOCK_DELETED(b)        (((b) == 0) || ((b) == 0xfffffffe))
  67
  68 #define BLOCK_TYPE(b)           ((b) & 0x7f)
  69 #define BLOCK_ADDRESS(b)        ((b) & ~0x7f)
  70 #define BLOCK_NUMBER(b)         ((b) >> 9)
  71 #define BLOCK_CONTROL           0x30
  72 #define BLOCK_DATA              0x40
  73 #define BLOCK_REPLACEMENT       0x60
  74 #define BLOCK_BAD               0x70
  75
  76 #endif /* _LINUX_FTL_H */