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156ca2bb HH |
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 | ||
812d904e | 11 | #include <linux/types.h> |
156ca2bb HH |
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 */ |