diff options
Diffstat (limited to 'bsps/powerpc/include/libcpu/byteorder.h')
| -rw-r--r-- | bsps/powerpc/include/libcpu/byteorder.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/bsps/powerpc/include/libcpu/byteorder.h b/bsps/powerpc/include/libcpu/byteorder.h new file mode 100644 index 0000000000..0654fefb58 --- /dev/null +++ b/bsps/powerpc/include/libcpu/byteorder.h @@ -0,0 +1,54 @@ +/* + * byteorder.h + * + * This file contains inline implementation of function to + * deal with endian conversion. + * + * It is a stripped down version of linux ppc file... + * + * Copyright (C) 1999 Eric Valette (valette@crf.canon.fr) + * Canon Centre Recherche France. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef _LIBCPU_BYTEORDER_H +#define _LIBCPU_BYTEORDER_H + +#ifdef __cplusplus +extern "C" { +#endif + +static inline unsigned ld_le16(volatile uint16_t *addr) +{ + unsigned val; + + __asm__ volatile ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); + return val; +} + +static inline void st_le16(volatile uint16_t *addr, unsigned val) +{ + __asm__ volatile ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); +} + +static inline unsigned ld_le32(volatile uint32_t *addr) +{ + unsigned val; + + __asm__ volatile ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); + return val; +} + +static inline void st_le32(volatile uint32_t *addr, unsigned val) +{ + __asm__ volatile ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); +} + +#ifdef __cplusplus +} +#endif + +#endif /* _LIBCPU_BYTEORDER_H */ |