include/libcpu/byteorder.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  byteorder.h  - Endian conversion for SPARC. SPARC is big endian only.
0005  *
0006  *  COPYRIGHT (c) 2011
0007  *  Aeroflex Gaisler.
0008  *
0009  * Redistribution and use in source and binary forms, with or without
0010  * modification, are permitted provided that the following conditions
0011  * are met:
0012  * 1. Redistributions of source code must retain the above copyright
0013  *    notice, this list of conditions and the following disclaimer.
0014  * 2. Redistributions in binary form must reproduce the above copyright
0015  *    notice, this list of conditions and the following disclaimer in the
0016  *    documentation and/or other materials provided with the distribution.
0017  *
0018  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0019  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0020  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0021  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0022  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0023  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0024  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0025  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0026  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0027  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0028  * POSSIBILITY OF SUCH DAMAGE.
0029  */
0030
0031 #ifndef _LIBCPU_BYTEORDER_H
0032 #define _LIBCPU_BYTEORDER_H
0033
0034 #include <rtems/score/cpu.h>
0035
0036 #ifdef __cplusplus
0037 extern "C" {
0038 #endif
0039
0040 static inline uint16_t ld_le16(volatile uint16_t *addr)
0041 {
0042     return CPU_swap_u16(*addr);
0043 }
0044
0045 static inline void st_le16(volatile uint16_t *addr, uint16_t val)
0046 {
0047     *addr = CPU_swap_u16(val);
0048 }
0049
0050 static inline uint32_t ld_le32(volatile uint32_t *addr)
0051 {
0052     return CPU_swap_u32(*addr);
0053 }
0054
0055 static inline void st_le32(volatile uint32_t *addr, uint32_t val)
0056 {
0057     *addr = CPU_swap_u32(val);
0058 }
0059
0060 static inline uint16_t ld_be16(volatile uint16_t *addr)
0061 {
0062     return *addr;
0063 }
0064
0065 static inline void st_be16(volatile uint16_t *addr, uint16_t val)
0066 {
0067     *addr = val;
0068 }
0069
0070 static inline uint32_t ld_be32(volatile uint32_t *addr)
0071 {
0072     return *addr;
0073 }
0074
0075 static inline void st_be32(volatile uint32_t *addr, uint32_t val)
0076 {
0077     *addr = val;
0078 }
0079
0080 #ifdef __cplusplus
0081 }
0082 #endif
0083
0084 #endif