1. 根目录:
2. include
3. linux
4. unaligned
5. be_byteshift.h

#ifndef _LINUX_UNALIGNED_BE_BYTESHIFT_H
#define _LINUX_UNALIGNED_BE_BYTESHIFT_H

#include <linux/types.h>

static inline u16 __get_unaligned_be16(const u8 *p)
{
	return p[0] << 8 | p[1];
}

static inline u32 __get_unaligned_be32(const u8 *p)
{
	return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
}

static inline u64 __get_unaligned_be64(const u8 *p)
{
	return (u64)__get_unaligned_be32(p) << 32 |
	       __get_unaligned_be32(p + 4);
}

static inline void __put_unaligned_be16(u16 val, u8 *p)
{
	*p++ = val >> 8;
	*p++ = val;
}

static inline void __put_unaligned_be32(u32 val, u8 *p)
{
	__put_unaligned_be16(val >> 16, p);
	__put_unaligned_be16(val, p + 2);
}

static inline void __put_unaligned_be64(u64 val, u8 *p)
{
	__put_unaligned_be32(val >> 32, p);
	__put_unaligned_be32(val, p + 4);
}

static inline u16 get_unaligned_be16(const void *p)
{
	return __get_unaligned_be16((const u8 *)p);
}

static inline u32 get_unaligned_be32(const void *p)
{
	return __get_unaligned_be32((const u8 *)p);
}

static inline u64 get_unaligned_be64(const void *p)
{
	return __get_unaligned_be64((const u8 *)p);
}

static inline void put_unaligned_be16(u16 val, void *p)
{
	__put_unaligned_be16(val, p);
}

static inline void put_unaligned_be32(u32 val, void *p)
{
	__put_unaligned_be32(val, p);
}

static inline void put_unaligned_be64(u64 val, void *p)
{
	__put_unaligned_be64(val, p);
}

#endif /* _LINUX_UNALIGNED_BE_BYTESHIFT_H */