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
ld_le16(const volatile __u16 * addr)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
st_le16(volatile __u16 * addr,const __u16 val)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
__arch_swab16s(__u16 * addr)36 static inline void __arch_swab16s(__u16 *addr)
37 {
38 st_le16(addr, *addr);
39 }
40 #define __arch_swab16s __arch_swab16s
41
ld_le32(const volatile __u32 * addr)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
st_le32(volatile __u32 * addr,const __u32 val)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
__arch_swab32s(__u32 * addr)56 static inline void __arch_swab32s(__u32 *addr)
57 {
58 st_le32(addr, *addr);
59 }
60 #define __arch_swab32s __arch_swab32s
61
__arch_swab16(__u16 value)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
__arch_swab32(__u32 value)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