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Harvey Harrison156ca2b2009-01-06 14:56:23 -08001#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 Rajput48109872009-01-31 11:54:05 +053011#include <linux/types.h>
Harvey Harrison156ca2b2009-01-06 14:56:23 -080012#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
22static __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
31static __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
36static inline void __arch_swab16s(__u16 *addr)
37{
38 st_le16(addr, *addr);
39}
40#define __arch_swab16s __arch_swab16s
41
42static __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
51static __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
56static inline void __arch_swab32s(__u32 *addr)
57{
58 st_le32(addr, *addr);
59}
60#define __arch_swab32s __arch_swab32s
61
62static 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
73static 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 */