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 26 #ifdef CONFIG_ARM64 27 28 #ifdef __AARCH64EB__ 29 #include <linux/byteorder/big_endian.h> 30 #else 31 #include <linux/byteorder/little_endian.h> 32 #endif 33 34 #else /* CONFIG_ARM64 */ 35 36 #ifdef __ARMEB__ 37 #include <linux/byteorder/big_endian.h> 38 #else 39 #include <linux/byteorder/little_endian.h> 40 #endif 41 42 #endif /* CONFIG_ARM64 */ 43 44 #endif 45