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a559c91d BB |
1 | #ifndef _ASM_POWERPC_BYTEORDER_H |
2 | #define _ASM_POWERPC_BYTEORDER_H | |
1da177e4 LT |
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 <asm/types.h> | |
12 | #include <linux/compiler.h> | |
13 | ||
14 | #ifdef __GNUC__ | |
15 | #ifdef __KERNEL__ | |
16 | ||
17 | static __inline__ __u16 ld_le16(const volatile __u16 *addr) | |
18 | { | |
19 | __u16 val; | |
20 | ||
21 | __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); | |
22 | return val; | |
23 | } | |
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__ __u32 ld_le32(const volatile __u32 *addr) | |
31 | { | |
32 | __u32 val; | |
33 | ||
34 | __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); | |
35 | return val; | |
36 | } | |
37 | ||
38 | static __inline__ void st_le32(volatile __u32 *addr, const __u32 val) | |
39 | { | |
40 | __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); | |
41 | } | |
42 | ||
1da177e4 LT |
43 | static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value) |
44 | { | |
45 | __u16 result; | |
46 | ||
47 | __asm__("rlwimi %0,%1,8,16,23" | |
48 | : "=r" (result) | |
49 | : "r" (value), "0" (value >> 8)); | |
50 | return result; | |
51 | } | |
52 | ||
53 | static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value) | |
54 | { | |
55 | __u32 result; | |
56 | ||
57 | __asm__("rlwimi %0,%1,24,16,23\n\t" | |
58 | "rlwimi %0,%1,8,8,15\n\t" | |
59 | "rlwimi %0,%1,24,0,7" | |
60 | : "=r" (result) | |
61 | : "r" (value), "0" (value >> 24)); | |
62 | return result; | |
63 | } | |
64 | ||
1da177e4 LT |
65 | #define __arch__swab16(x) ___arch__swab16(x) |
66 | #define __arch__swab32(x) ___arch__swab32(x) | |
1da177e4 LT |
67 | |
68 | /* The same, but returns converted value from the location pointer by addr. */ | |
69 | #define __arch__swab16p(addr) ld_le16(addr) | |
70 | #define __arch__swab32p(addr) ld_le32(addr) | |
71 | ||
72 | /* The same, but do the conversion in situ, ie. put the value back to addr. */ | |
73 | #define __arch__swab16s(addr) st_le16(addr,*addr) | |
74 | #define __arch__swab32s(addr) st_le32(addr,*addr) | |
75 | ||
76 | #endif /* __KERNEL__ */ | |
77 | ||
78 | #ifndef __STRICT_ANSI__ | |
79 | #define __BYTEORDER_HAS_U64__ | |
a559c91d BB |
80 | #ifndef __powerpc64__ |
81 | #define __SWAB_64_THRU_32__ | |
82 | #endif /* __powerpc64__ */ | |
83 | #endif /* __STRICT_ANSI__ */ | |
1da177e4 LT |
84 | |
85 | #endif /* __GNUC__ */ | |
86 | ||
87 | #include <linux/byteorder/big_endian.h> | |
88 | ||
a559c91d | 89 | #endif /* _ASM_POWERPC_BYTEORDER_H */ |