1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2003, 2004 Ralf Baechle 7 */ 8 #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H 9 #define __ASM_MACH_GENERIC_MANGLE_PORT_H 10 11 #include <asm/byteorder.h> 12 13 #ifdef __BIG_ENDIAN 14 15 static inline bool __should_swizzle_bits(volatile void *a) 16 { 17 extern const bool octeon_should_swizzle_table[]; 18 u64 did = ((u64)(uintptr_t)a >> 40) & 0xff; 19 20 return octeon_should_swizzle_table[did]; 21 } 22 23 # define __swizzle_addr_b(port) (port) 24 # define __swizzle_addr_w(port) (port) 25 # define __swizzle_addr_l(port) (port) 26 # define __swizzle_addr_q(port) (port) 27 28 #else /* __LITTLE_ENDIAN */ 29 30 #define __should_swizzle_bits(a) false 31 32 static inline bool __should_swizzle_addr(u64 p) 33 { 34 /* boot bus? */ 35 return ((p >> 40) & 0xff) == 0; 36 } 37 38 # define __swizzle_addr_b(port) \ 39 (__should_swizzle_addr(port) ? (port) ^ 7 : (port)) 40 # define __swizzle_addr_w(port) \ 41 (__should_swizzle_addr(port) ? (port) ^ 6 : (port)) 42 # define __swizzle_addr_l(port) \ 43 (__should_swizzle_addr(port) ? (port) ^ 4 : (port)) 44 # define __swizzle_addr_q(port) (port) 45 46 #endif /* __BIG_ENDIAN */ 47 48 49 # define ioswabb(a, x) (x) 50 # define __mem_ioswabb(a, x) (x) 51 # define ioswabw(a, x) (__should_swizzle_bits(a) ? \ 52 le16_to_cpu((__force __le16)(x)) : \ 53 (x)) 54 # define __mem_ioswabw(a, x) (x) 55 # define ioswabl(a, x) (__should_swizzle_bits(a) ? \ 56 le32_to_cpu((__force __le32)(x)) : \ 57 (x)) 58 # define __mem_ioswabl(a, x) (x) 59 # define ioswabq(a, x) (__should_swizzle_bits(a) ? \ 60 le64_to_cpu((__force __le64)(x)) : \ 61 (x)) 62 # define __mem_ioswabq(a, x) (x) 63 64 #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ 65