You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.1 KiB
47 lines
1.1 KiB
/*
|
|
* linux/include/asm-arm/byteorder.h
|
|
*
|
|
* ARM Endian-ness. In little endian mode, the data bus is connected such
|
|
* that byte accesses appear as:
|
|
* 0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31
|
|
* and word accesses (data or instruction) appear as:
|
|
* d0...d31
|
|
*
|
|
* When in big endian mode, byte accesses appear as:
|
|
* 0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7
|
|
* and word accesses (data or instruction) appear as:
|
|
* d0...d31
|
|
*/
|
|
#ifndef __ASM_ARM_BYTEORDER_H
|
|
#define __ASM_ARM_BYTEORDER_H
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/types.h>
|
|
|
|
static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
|
|
{
|
|
__u32 t;
|
|
|
|
t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */
|
|
x = (x << 24) | (x >> 8); /* mov r0,r0,ror #8 */
|
|
t &= ~0x00FF0000; /* bic r1,r1,#0x00FF0000 */
|
|
x ^= (t >> 8); /* eor r0,r0,r1,lsr #8 */
|
|
|
|
return x;
|
|
}
|
|
|
|
#define __arch__swab32(x) ___arch__swab32(x)
|
|
|
|
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
|
|
# define __BYTEORDER_HAS_U64__
|
|
# define __SWAB_64_THRU_32__
|
|
#endif
|
|
|
|
#ifdef __ARMEB__
|
|
#include <linux/byteorder/big_endian.h>
|
|
#else
|
|
#include <linux/byteorder/little_endian.h>
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|