lzodefs.h (1864B)
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)