Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _PPC_BYTEORDER_H
2#define _PPC_BYTEORDER_H
3
4#include <asm/types.h>
5#include <linux/compiler.h>
6
7#ifdef __GNUC__
8#ifdef __KERNEL__
9
10extern __inline__ unsigned ld_le16(const volatile unsigned short *addr)
11{
12 unsigned val;
13
14 __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
15 return val;
16}
17
18extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val)
19{
20 __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
21}
22
23extern __inline__ unsigned ld_le32(const volatile unsigned *addr)
24{
25 unsigned val;
26
27 __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
28 return val;
29}
30
31extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
32{
33 __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
34}
35
36static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value)
37{
38 __u16 result;
39
40 __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (value >> 8), "r" (value));
41 return result;
42}
43
44static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value)
45{
46 __u32 result;
47
48 __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (value>>24), "r" (value));
49 __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (value));
50 __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (value));
51
52 return result;
53}
54#define __arch__swab32(x) ___arch__swab32(x)
55#define __arch__swab16(x) ___arch__swab16(x)
56
57/* The same, but returns converted value from the location pointer by addr. */
58#define __arch__swab16p(addr) ld_le16(addr)
59#define __arch__swab32p(addr) ld_le32(addr)
60
61/* The same, but do the conversion in situ, ie. put the value back to addr. */
62#define __arch__swab16s(addr) st_le16(addr,*addr)
63#define __arch__swab32s(addr) st_le32(addr,*addr)
64
65#endif /* __KERNEL__ */
66
67#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
68# define __BYTEORDER_HAS_U64__
69# define __SWAB_64_THRU_32__
70#endif
71
72#endif /* __GNUC__ */
73
74#include <linux/byteorder/big_endian.h>
75
76#endif /* _PPC_BYTEORDER_H */