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