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
22typedef 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