/*
 * ftl.h 1.5 1999/07/20 16:07:58
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License. 
 *
 * The initial developer of the original code is David A. Hinds
 * <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
 * are Copyright (C) 1998 David A. Hinds.  All Rights Reserved.
 */

#ifndef _LINUX_FTL_H
#define _LINUX_FTL_H

typedef struct erase_unit_header_t {
    u_char      LinkTargetTuple[5];
    u_char      DataOrgTuple[10];
    u_char      NumTransferUnits;
    u_int       EraseCount;
    u_short     LogicalEUN;
    u_char      BlockSize;
    u_char      EraseUnitSize;
    u_short     FirstPhysicalEUN;
    u_short     NumEraseUnits;
    u_int       FormattedSize;
    u_int       FirstVMAddress;
    u_short     NumVMPages;
    u_char      Flags;
    u_char      Code;
    u_int       SerialNumber;
    u_int       AltEUHOffset;
    u_int       BAMOffset;
    u_char      Reserved[12];
    u_char      EndTuple[2];
} erase_unit_header_t;

/* Flags in erase_unit_header_t */
#define HIDDEN_AREA             0x01
#define REVERSE_POLARITY        0x02
#define DOUBLE_BAI              0x04

/* Definitions for block allocation information */

#define BLOCK_FREE(b)           ((b) == 0xffffffff)
#define BLOCK_DELETED(b)        (((b) == 0) || ((b) == 0xfffffffe))

#define BLOCK_TYPE(b)           ((b) & 0x7f)
#define BLOCK_ADDRESS(b)        ((b) & ~0x7f)
#define BLOCK_NUMBER(b)         ((b) >> 9)
#define BLOCK_CONTROL           0x30
#define BLOCK_DATA              0x40
#define BLOCK_REPLACEMENT       0x60
#define BLOCK_BAD               0x70

#endif /* _LINUX_FTL_H */