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https://source.denx.de/u-boot/u-boot.git
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b1b4e89a0f
This patch adds LZO decompression support to U-Boot. It is needed for the upcoming UBIFS support, since UBIFS uses LZO as default compressor/ decompressor. Since we only support read-only in UBIFS, only the decompressor is needed. All this is copied with minor changes from the current Linux kernel version (2.6.28-rc8). This patch only implements this LZO decompressor support for PPC. Other platforms using UBIFS will have to add the required "include/asm/unaligned.h" as well. It should be fairly easy to copy this from the Linux source tree as I have done it for PPC in this patch. Signed-off-by: Stefan Roese <sr@denx.de>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
#ifndef _LINUX_UNALIGNED_GENERIC_H
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#define _LINUX_UNALIGNED_GENERIC_H
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/* define __force to nothing in U-Boot */
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#define __force
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/*
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* Cause a link-time error if we try an unaligned access other than
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* 1,2,4 or 8 bytes long
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*/
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extern void __bad_unaligned_access_size(void);
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#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
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__bad_unaligned_access_size())))); \
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}))
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#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
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__bad_unaligned_access_size())))); \
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}))
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#define __put_unaligned_le(val, ptr) ({ \
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void *__gu_p = (ptr); \
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switch (sizeof(*(ptr))) { \
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case 1: \
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*(u8 *)__gu_p = (__force u8)(val); \
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break; \
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case 2: \
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put_unaligned_le16((__force u16)(val), __gu_p); \
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break; \
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case 4: \
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put_unaligned_le32((__force u32)(val), __gu_p); \
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break; \
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case 8: \
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put_unaligned_le64((__force u64)(val), __gu_p); \
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break; \
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default: \
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__bad_unaligned_access_size(); \
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break; \
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} \
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(void)0; })
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#define __put_unaligned_be(val, ptr) ({ \
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void *__gu_p = (ptr); \
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switch (sizeof(*(ptr))) { \
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case 1: \
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*(u8 *)__gu_p = (__force u8)(val); \
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break; \
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case 2: \
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put_unaligned_be16((__force u16)(val), __gu_p); \
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break; \
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case 4: \
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put_unaligned_be32((__force u32)(val), __gu_p); \
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break; \
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case 8: \
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put_unaligned_be64((__force u64)(val), __gu_p); \
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break; \
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default: \
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__bad_unaligned_access_size(); \
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break; \
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} \
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(void)0; })
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#endif /* _LINUX_UNALIGNED_GENERIC_H */
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