| Harvey Harrison | 156ca2b | 2009-01-06 14:56:23 -0800 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_SWAB_H |
| 2 | #define _ASM_POWERPC_SWAB_H |
| 3 | |
| 4 | /* |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version |
| 8 | * 2 of the License, or (at your option) any later version. |
| 9 | */ |
| 10 | |
| Jaswinder Singh Rajput | 4810987 | 2009-01-31 11:54:05 +0530 | [diff] [blame] | 11 | #include <linux/types.h> |
| Harvey Harrison | 156ca2b | 2009-01-06 14:56:23 -0800 | [diff] [blame] | 12 | #include <linux/compiler.h> |
| 13 | |
| 14 | #ifdef __GNUC__ |
| 15 | |
| 16 | #ifndef __powerpc64__ |
| 17 | #define __SWAB_64_THRU_32__ |
| 18 | #endif /* __powerpc64__ */ |
| 19 | |
| 20 | #ifdef __KERNEL__ |
| 21 | |
| 22 | static __inline__ __u16 ld_le16(const volatile __u16 *addr) |
| 23 | { |
| 24 | __u16 val; |
| 25 | |
| 26 | __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); |
| 27 | return val; |
| 28 | } |
| 29 | #define __arch_swab16p ld_le16 |
| 30 | |
| 31 | static __inline__ void st_le16(volatile __u16 *addr, const __u16 val) |
| 32 | { |
| 33 | __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); |
| 34 | } |
| 35 | |
| 36 | static inline void __arch_swab16s(__u16 *addr) |
| 37 | { |
| 38 | st_le16(addr, *addr); |
| 39 | } |
| 40 | #define __arch_swab16s __arch_swab16s |
| 41 | |
| 42 | static __inline__ __u32 ld_le32(const volatile __u32 *addr) |
| 43 | { |
| 44 | __u32 val; |
| 45 | |
| 46 | __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); |
| 47 | return val; |
| 48 | } |
| 49 | #define __arch_swab32p ld_le32 |
| 50 | |
| 51 | static __inline__ void st_le32(volatile __u32 *addr, const __u32 val) |
| 52 | { |
| 53 | __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); |
| 54 | } |
| 55 | |
| 56 | static inline void __arch_swab32s(__u32 *addr) |
| 57 | { |
| 58 | st_le32(addr, *addr); |
| 59 | } |
| 60 | #define __arch_swab32s __arch_swab32s |
| 61 | |
| 62 | static inline __attribute_const__ __u16 __arch_swab16(__u16 value) |
| 63 | { |
| 64 | __u16 result; |
| 65 | |
| 66 | __asm__("rlwimi %0,%1,8,16,23" |
| 67 | : "=r" (result) |
| 68 | : "r" (value), "0" (value >> 8)); |
| 69 | return result; |
| 70 | } |
| 71 | #define __arch_swab16 __arch_swab16 |
| 72 | |
| 73 | static inline __attribute_const__ __u32 __arch_swab32(__u32 value) |
| 74 | { |
| 75 | __u32 result; |
| 76 | |
| 77 | __asm__("rlwimi %0,%1,24,16,23\n\t" |
| 78 | "rlwimi %0,%1,8,8,15\n\t" |
| 79 | "rlwimi %0,%1,24,0,7" |
| 80 | : "=r" (result) |
| 81 | : "r" (value), "0" (value >> 24)); |
| 82 | return result; |
| 83 | } |
| 84 | #define __arch_swab32 __arch_swab32 |
| 85 | |
| 86 | #endif /* __KERNEL__ */ |
| 87 | |
| 88 | #endif /* __GNUC__ */ |
| 89 | |
| 90 | #endif /* _ASM_POWERPC_SWAB_H */ |