1 /* 2 * linux/include/asm-arm/byteorder.h 3 * 4 * Copyright (C) 2017 Andes Technology Corporation 5 * Rick Chen, Andes Technology Corporation <rick@andestech.com> 6 * 7 * ARM Endian-ness. In little endian mode, the data bus is connected such 8 * that byte accesses appear as: 9 * 0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31 10 * and word accesses (data or instruction) appear as: 11 * d0...d31 12 * 13 * When in big endian mode, byte accesses appear as: 14 * 0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7 15 * and word accesses (data or instruction) appear as: 16 * d0...d31 17 */ 18 19 #ifndef __ASM_RISCV_BYTEORDER_H 20 #define __ASM_RISCV_BYTEORDER_H 21 22 #include <asm/types.h> 23 24 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) 25 # define __BYTEORDER_HAS_U64__ 26 # define __SWAB_64_THRU_32__ 27 #endif 28 29 #ifdef __RISCVEB__ 30 #include <linux/byteorder/big_endian.h> 31 #else 32 #include <linux/byteorder/little_endian.h> 33 #endif 34 35 #endif 36