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/*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _BCMENDIAN_H_
#define _BCMENDIAN_H_
/* Reverse the bytes in a 16-bit value */
#define BCMSWAP16(val) \
((u16)((((u16)(val) & (u16)0x00ffU) << 8) | \
(((u16)(val) & (u16)0xff00U) >> 8)))
/* Reverse the bytes in a 32-bit value */
#define BCMSWAP32(val) \
((u32)((((u32)(val) & (u32)0x000000ffU) << 24) | \
(((u32)(val) & (u32)0x0000ff00U) << 8) | \
(((u32)(val) & (u32)0x00ff0000U) >> 8) | \
(((u32)(val) & (u32)0xff000000U) >> 24)))
/* Reverse the two 16-bit halves of a 32-bit value */
#define BCMSWAP32BY16(val) \
((u32)((((u32)(val) & (u32)0x0000ffffU) << 16) | \
(((u32)(val) & (u32)0xffff0000U) >> 16)))
#ifndef IL_BIGENDIAN
#define ltoh16_buf(buf, i)
#define htol16_buf(buf, i)
#else
#define ltoh16_buf(buf, i) bcmswap16_buf((u16 *)(buf), (i))
#define htol16_buf(buf, i) bcmswap16_buf((u16 *)(buf), (i))
#endif /* IL_BIGENDIAN */
#ifdef __GNUC__
/* GNU macro versions avoid referencing the argument multiple times, while also
* avoiding the -fno-inline used in ROM builds.
*/
#define bcmswap16(val) ({ \
u16 _val = (val); \
BCMSWAP16(_val); \
})
#define bcmswap32(val) ({ \
u32 _val = (val); \
BCMSWAP32(_val); \
})
#define bcmswap32by16(val) ({ \
u32 _val = (val); \
BCMSWAP32BY16(_val); \
})
#define bcmswap16_buf(buf, len) ({ \
u16 *_buf = (u16 *)(buf); \
uint _wds = (len) / 2; \
while (_wds--) { \
*_buf = bcmswap16(*_buf); \
_buf++; \
} \
})
#else /* !__GNUC__ */
/* Inline versions avoid referencing the argument multiple times */
static inline u16 bcmswap16(u16 val)
{
return BCMSWAP16(val);
}
static inline u32 bcmswap32(u32 val)
{
return BCMSWAP32(val);
}
static inline u32 bcmswap32by16(u32 val)
{
return BCMSWAP32BY16(val);
}
/* Reverse pairs of bytes in a buffer (not for high-performance use) */
/* buf - start of buffer of shorts to swap */
/* len - byte length of buffer */
static inline void bcmswap16_buf(u16 *buf, uint len)
{
len = len / 2;
while (len--) {
*buf = bcmswap16(*buf);
buf++;
}
}
#endif /* !__GNUC__ */
#endif /* !_BCMENDIAN_H_ */
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