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