1#ifndef _ASM_POWERPC_BYTEORDER_H
2#define _ASM_POWERPC_BYTEORDER_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 <asm/types.h>
12#include <linux/compiler.h>
13
14#ifdef __GNUC__
15#ifdef __KERNEL__
16
17static __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
25static __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
30static __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
38static __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
43static __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
53static __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
65#define __arch__swab16(x) ___arch__swab16(x)
66#define __arch__swab32(x) ___arch__swab32(x)
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__
80#ifndef __powerpc64__
81#define __SWAB_64_THRU_32__
82#endif /* __powerpc64__ */
83#endif /* __STRICT_ANSI__ */
84
85#endif /* __GNUC__ */
86
87#include <linux/byteorder/big_endian.h>
88
89#endif /* _ASM_POWERPC_BYTEORDER_H */
90