RTEMS 5.2
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byteorder.h
1/*
2 * byteorder.h
3 *
4 * This file contains inline implementation of function to
5 * deal with endian conversion.
6 *
7 * It is a stripped down version of linux ppc file...
8 *
9 * Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
10 * Canon Centre Recherche France.
11 *
12 * The license and distribution terms for this file may be
13 * found in the file LICENSE in this distribution or at
14 * http://www.rtems.org/license/LICENSE.
15 */
16
17#ifndef _LIBCPU_BYTEORDER_H
18#define _LIBCPU_BYTEORDER_H
19
20#ifdef __cplusplus
21extern "C" {
22#endif
23
24static inline unsigned ld_le16(volatile uint16_t *addr)
25{
26 unsigned val;
27
28 __asm__ volatile ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
29 return val;
30}
31
32static inline void st_le16(volatile uint16_t *addr, unsigned val)
33{
34 __asm__ volatile ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
35}
36
37static inline unsigned ld_le32(volatile uint32_t *addr)
38{
39 unsigned val;
40
41 __asm__ volatile ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
42 return val;
43}
44
45static inline void st_le32(volatile uint32_t *addr, unsigned val)
46{
47 __asm__ volatile ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
48}
49
50#ifdef __cplusplus
51}
52#endif
53
54#endif /* _LIBCPU_BYTEORDER_H */
__asm__
register struct Per_CPU_Control *_SPARC_Per_CPU_current __asm__("g6")
The pointer to the current per-CPU control is available via register g6.
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