forked from mirrors/linux
45ec975efb
To prevent any issues with persistent data, separate lzo-rle from lzo so that it is treated as a separate algorithm, and lzo is still available. Link: http://lkml.kernel.org/r/20190205155944.16007-3-dave.rodgman@arm.com Signed-off-by: Dave Rodgman <dave.rodgman@arm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Markus F.X.J. Oberhumer <markus@oberhumer.com> Cc: Matt Sealey <matt.sealey@arm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <nitingupta910@gmail.com> Cc: Richard Purdie <rpurdie@openedhand.com> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Sonny Rao <sonnyrao@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* lzodefs.h -- architecture, OS and compiler specific defines
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*
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* Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
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*
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* The full LZO package can be found at:
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* http://www.oberhumer.com/opensource/lzo/
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*
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* Changed for Linux kernel use by:
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* Nitin Gupta <nitingupta910@gmail.com>
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* Richard Purdie <rpurdie@openedhand.com>
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*/
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/* Version
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* 0: original lzo version
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* 1: lzo with support for RLE
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*/
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#define LZO_VERSION 1
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#define COPY4(dst, src) \
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put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
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#if defined(CONFIG_X86_64) || defined(CONFIG_ARM64)
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#define COPY8(dst, src) \
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put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst))
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#else
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#define COPY8(dst, src) \
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COPY4(dst, src); COPY4((dst) + 4, (src) + 4)
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#endif
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#if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN)
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#error "conflicting endian definitions"
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#elif defined(CONFIG_X86_64) || defined(CONFIG_ARM64)
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#define LZO_USE_CTZ64 1
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#define LZO_USE_CTZ32 1
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#define LZO_FAST_64BIT_MEMORY_ACCESS
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#elif defined(CONFIG_X86) || defined(CONFIG_PPC)
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#define LZO_USE_CTZ32 1
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#elif defined(CONFIG_ARM) && (__LINUX_ARM_ARCH__ >= 5)
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#define LZO_USE_CTZ32 1
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#endif
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#define M1_MAX_OFFSET 0x0400
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#define M2_MAX_OFFSET 0x0800
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#define M3_MAX_OFFSET 0x4000
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#define M4_MAX_OFFSET_V0 0xbfff
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#define M4_MAX_OFFSET_V1 0xbffe
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#define M1_MIN_LEN 2
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#define M1_MAX_LEN 2
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#define M2_MIN_LEN 3
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#define M2_MAX_LEN 8
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#define M3_MIN_LEN 3
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#define M3_MAX_LEN 33
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#define M4_MIN_LEN 3
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#define M4_MAX_LEN 9
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#define M1_MARKER 0
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#define M2_MARKER 64
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#define M3_MARKER 32
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#define M4_MARKER 16
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#define MIN_ZERO_RUN_LENGTH 4
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#define MAX_ZERO_RUN_LENGTH (2047 + MIN_ZERO_RUN_LENGTH)
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#define lzo_dict_t unsigned short
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#define D_BITS 13
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#define D_SIZE (1u << D_BITS)
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#define D_MASK (D_SIZE - 1)
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#define D_HIGH ((D_MASK >> 1) + 1)
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