1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * lzodefs.h -- architecture, OS and compiler specific defines
4 *
5 * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
6 *
7 * The full LZO package can be found at:
8 * http://www.oberhumer.com/opensource/lzo/
9 *
10 * Changed for Linux kernel use by:
11 * Nitin Gupta <nitingupta910@gmail.com>
12 * Richard Purdie <rpurdie@openedhand.com>
13 */
14
15
16/* Version
17 * 0: original lzo version
18 * 1: lzo with support for RLE
19 */
20#define LZO_VERSION 1
21
22#define COPY4(dst, src) \
23 put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
24#if defined(CONFIG_X86_64) || defined(CONFIG_ARM64)
25#define COPY8(dst, src) \
26 put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst))
27#else
28#define COPY8(dst, src) \
29 COPY4(dst, src); COPY4((dst) + 4, (src) + 4)
30#endif
31
32#if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN)
33#error "conflicting endian definitions"
34#elif defined(CONFIG_X86_64) || defined(CONFIG_ARM64)
35#define LZO_USE_CTZ64 1
36#define LZO_USE_CTZ32 1
37#define LZO_FAST_64BIT_MEMORY_ACCESS
38#elif defined(CONFIG_X86) || defined(CONFIG_PPC)
39#define LZO_USE_CTZ32 1
40#elif defined(CONFIG_ARM) && (__LINUX_ARM_ARCH__ >= 5)
41#define LZO_USE_CTZ32 1
42#endif
43
44#define M1_MAX_OFFSET 0x0400
45#define M2_MAX_OFFSET 0x0800
46#define M3_MAX_OFFSET 0x4000
47#define M4_MAX_OFFSET_V0 0xbfff
48#define M4_MAX_OFFSET_V1 0xbffe
49
50#define M1_MIN_LEN 2
51#define M1_MAX_LEN 2
52#define M2_MIN_LEN 3
53#define M2_MAX_LEN 8
54#define M3_MIN_LEN 3
55#define M3_MAX_LEN 33
56#define M4_MIN_LEN 3
57#define M4_MAX_LEN 9
58
59#define M1_MARKER 0
60#define M2_MARKER 64
61#define M3_MARKER 32
62#define M4_MARKER 16
63
64#define MIN_ZERO_RUN_LENGTH 4
65#define MAX_ZERO_RUN_LENGTH (2047 + MIN_ZERO_RUN_LENGTH)
66
67#define lzo_dict_t unsigned short
68#define D_BITS 13
69#define D_SIZE (1u << D_BITS)
70#define D_MASK (D_SIZE - 1)
71#define D_HIGH ((D_MASK >> 1) + 1)
72