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60f1ba7b68
The get_unaligned()/put_unaligned() implementations are more
complex than necessary.
Move everything into one file and use a more compact implementation based
on packed struct access and byte swapping macros.
This patch is based on the Linux kernel commit 803f4e1eab7a
("asm-generic: simplify asm/unaligned.h") by Arnd Bergmann.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _GENERIC_UNALIGNED_H
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#define _GENERIC_UNALIGNED_H
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#include <asm/byteorder.h>
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#define __get_unaligned_t(type, ptr) ({ \
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const struct { type x; } __packed * __pptr = (typeof(__pptr))(ptr); \
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__pptr->x; \
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})
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#define __put_unaligned_t(type, val, ptr) do { \
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struct { type x; } __packed * __pptr = (typeof(__pptr))(ptr); \
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__pptr->x = (val); \
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} while (0)
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#define get_unaligned(ptr) __get_unaligned_t(typeof(*(ptr)), (ptr))
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#define put_unaligned(val, ptr) __put_unaligned_t(typeof(*(ptr)), (val), (ptr))
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static inline u16 get_unaligned_le16(const void *p)
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{
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return le16_to_cpu(__get_unaligned_t(__le16, p));
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}
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static inline u32 get_unaligned_le32(const void *p)
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{
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return le32_to_cpu(__get_unaligned_t(__le32, p));
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}
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static inline u64 get_unaligned_le64(const void *p)
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{
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return le64_to_cpu(__get_unaligned_t(__le64, p));
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}
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static inline void put_unaligned_le16(u16 val, void *p)
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{
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__put_unaligned_t(__le16, cpu_to_le16(val), p);
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}
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static inline void put_unaligned_le32(u32 val, void *p)
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{
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__put_unaligned_t(__le32, cpu_to_le32(val), p);
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}
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static inline void put_unaligned_le64(u64 val, void *p)
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{
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__put_unaligned_t(__le64, cpu_to_le64(val), p);
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}
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static inline u16 get_unaligned_be16(const void *p)
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{
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return be16_to_cpu(__get_unaligned_t(__be16, p));
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}
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static inline u32 get_unaligned_be32(const void *p)
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{
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return be32_to_cpu(__get_unaligned_t(__be32, p));
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}
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static inline u64 get_unaligned_be64(const void *p)
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{
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return be64_to_cpu(__get_unaligned_t(__be64, p));
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}
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static inline void put_unaligned_be16(u16 val, void *p)
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{
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__put_unaligned_t(__be16, cpu_to_be16(val), p);
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}
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static inline void put_unaligned_be32(u32 val, void *p)
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{
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__put_unaligned_t(__be32, cpu_to_be32(val), p);
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}
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static inline void put_unaligned_be64(u64 val, void *p)
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{
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__put_unaligned_t(__be64, cpu_to_be64(val), p);
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}
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/* Allow unaligned memory access */
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void allow_unaligned(void);
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#endif
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