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 11 #include <linux/types.h> 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 */ 91