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 #define COPY4(dst, src) \ 17 put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst)) 18 #if defined(__x86_64__) 19 #define COPY8(dst, src) \ 20 put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst)) 21 #else 22 #define COPY8(dst, src) \ 23 COPY4(dst, src); COPY4((dst) + 4, (src) + 4) 24 #endif 25 26 #if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN) 27 #error "conflicting endian definitions" 28 #elif defined(__x86_64__) 29 #define LZO_USE_CTZ64 1 30 #define LZO_USE_CTZ32 1 31 #elif defined(__i386__) || defined(__powerpc__) 32 #define LZO_USE_CTZ32 1 33 #elif defined(__arm__) && (__LINUX_ARM_ARCH__ >= 5) 34 #define LZO_USE_CTZ32 1 35 #endif 36 37 #define M1_MAX_OFFSET 0x0400 38 #define M2_MAX_OFFSET 0x0800 39 #define M3_MAX_OFFSET 0x4000 40 #define M4_MAX_OFFSET 0xbfff 41 42 #define M1_MIN_LEN 2 43 #define M1_MAX_LEN 2 44 #define M2_MIN_LEN 3 45 #define M2_MAX_LEN 8 46 #define M3_MIN_LEN 3 47 #define M3_MAX_LEN 33 48 #define M4_MIN_LEN 3 49 #define M4_MAX_LEN 9 50 51 #define M1_MARKER 0 52 #define M2_MARKER 64 53 #define M3_MARKER 32 54 #define M4_MARKER 16 55 56 #define lzo_dict_t unsigned short 57 #define D_BITS 13 58 #define D_SIZE (1u << D_BITS) 59 #define D_MASK (D_SIZE - 1) 60 #define D_HIGH ((D_MASK >> 1) + 1) 61