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powerpc: introduce asm/swab.h
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Harvey Harrison
Linus Torvalds
parent
8cdd3a9261
commit
156ca2bbf6
@ -35,3 +35,4 @@ unifdef-y += spu_info.h
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unifdef-y += termios.h
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unifdef-y += types.h
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unifdef-y += unistd.h
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unifdef-y += swab.h
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@ -8,86 +8,7 @@
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/types.h>
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#include <linux/compiler.h>
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#define __BIG_ENDIAN
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#ifdef __GNUC__
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#ifdef __KERNEL__
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static __inline__ __u16 ld_le16(const volatile __u16 *addr)
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{
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__u16 val;
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__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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#define __arch_swab16p ld_le16
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static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
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{
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__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static inline void __arch_swab16s(__u16 *addr)
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{
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st_le16(addr, *addr);
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}
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#define __arch_swab16s __arch_swab16s
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static __inline__ __u32 ld_le32(const volatile __u32 *addr)
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{
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__u32 val;
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__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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#define __arch_swab32p ld_le32
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static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
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{
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__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static inline void __arch_swab32s(__u32 *addr)
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{
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st_le32(addr, *addr);
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}
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#define __arch_swab32s __arch_swab32s
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static inline __attribute_const__ __u16 __arch_swab16(__u16 value)
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{
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__u16 result;
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__asm__("rlwimi %0,%1,8,16,23"
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: "=r" (result)
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: "r" (value), "0" (value >> 8));
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return result;
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}
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#define __arch_swab16 __arch_swab16
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static inline __attribute_const__ __u32 __arch_swab32(__u32 value)
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{
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__u32 result;
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__asm__("rlwimi %0,%1,24,16,23\n\t"
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"rlwimi %0,%1,8,8,15\n\t"
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"rlwimi %0,%1,24,0,7"
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: "=r" (result)
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: "r" (value), "0" (value >> 24));
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return result;
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}
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#define __arch_swab32 __arch_swab32
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#endif /* __KERNEL__ */
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#ifndef __powerpc64__
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#define __SWAB_64_THRU_32__
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#endif /* __powerpc64__ */
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#endif /* __GNUC__ */
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#include <linux/byteorder.h>
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#include <asm/swab.h>
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#include <linux/byteorder/big_endian.h>
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#endif /* _ASM_POWERPC_BYTEORDER_H */
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90
arch/powerpc/include/asm/swab.h
Normal file
90
arch/powerpc/include/asm/swab.h
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@ -0,0 +1,90 @@
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#ifndef _ASM_POWERPC_SWAB_H
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#define _ASM_POWERPC_SWAB_H
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/types.h>
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#include <linux/compiler.h>
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#ifdef __GNUC__
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#ifndef __powerpc64__
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#define __SWAB_64_THRU_32__
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#endif /* __powerpc64__ */
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#ifdef __KERNEL__
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static __inline__ __u16 ld_le16(const volatile __u16 *addr)
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{
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__u16 val;
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__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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#define __arch_swab16p ld_le16
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static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
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{
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__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static inline void __arch_swab16s(__u16 *addr)
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{
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st_le16(addr, *addr);
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}
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#define __arch_swab16s __arch_swab16s
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static __inline__ __u32 ld_le32(const volatile __u32 *addr)
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{
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__u32 val;
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__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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#define __arch_swab32p ld_le32
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static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
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{
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__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static inline void __arch_swab32s(__u32 *addr)
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{
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st_le32(addr, *addr);
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}
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#define __arch_swab32s __arch_swab32s
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static inline __attribute_const__ __u16 __arch_swab16(__u16 value)
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{
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__u16 result;
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__asm__("rlwimi %0,%1,8,16,23"
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: "=r" (result)
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: "r" (value), "0" (value >> 8));
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return result;
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}
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#define __arch_swab16 __arch_swab16
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static inline __attribute_const__ __u32 __arch_swab32(__u32 value)
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{
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__u32 result;
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__asm__("rlwimi %0,%1,24,16,23\n\t"
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"rlwimi %0,%1,8,8,15\n\t"
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"rlwimi %0,%1,24,0,7"
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: "=r" (result)
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: "r" (value), "0" (value >> 24));
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return result;
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}
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#define __arch_swab32 __arch_swab32
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#endif /* __KERNEL__ */
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#endif /* __GNUC__ */
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#endif /* _ASM_POWERPC_SWAB_H */
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