[people/ms/u-boot.git] / arch / arm / include / asm / byteorder.h

/*
 *  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 <asm/types.h>

#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
#  define __BYTEORDER_HAS_U64__
#  define __SWAB_64_THRU_32__
#endif

#if defined(__ARMEB__) || defined(__AARCH64EB__)
#include <linux/byteorder/big_endian.h>
#else
#include <linux/byteorder/little_endian.h>
#endif

#endif
Commit	Line	Data
a33982a5 WD	1	/*
	2	* linux/include/asm-arm/byteorder.h
	3	*
	4	* ARM Endian-ness. In little endian mode, the data bus is connected such
	5	* that byte accesses appear as:
	6	* 0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31
	7	* and word accesses (data or instruction) appear as:
	8	* d0...d31
	9	*
	10	* When in big endian mode, byte accesses appear as:
	11	* 0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7
	12	* and word accesses (data or instruction) appear as:
	13	* d0...d31
	14	*/
	15	#ifndef __ASM_ARM_BYTEORDER_H
	16	#define __ASM_ARM_BYTEORDER_H
	17
	18
	19	#include <asm/types.h>
	20
	21	#if !defined(__STRICT_ANSI__) \|\| defined(__KERNEL__)
	22	# define __BYTEORDER_HAS_U64__
	23	# define __SWAB_64_THRU_32__
	24	#endif
	25
795611e6	26	#if defined(__ARMEB__) \|\| defined(__AARCH64EB__)
a33982a5 WD	27	#include <linux/byteorder/big_endian.h>
	28	#else
	29	#include <linux/byteorder/little_endian.h>
	30	#endif
	31
	32	#endif