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