1/*
2 * $Id: ftl.h,v 1.1.1.1 2008/10/15 03:27:31 james26_jang 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
36typedef 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 */
77