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/*
* local version of endian.h - byte order defines
*
* Copyright 2005, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
* $Id: bcmendian.h,v 1.1.1.8 2005/03/07 07:31:12 kanki Exp $
*/
#ifndef _BCMENDIAN_H_
#define _BCMENDIAN_H_
#include <typedefs.h>
/* Byte swap a 16 bit value */
#define BCMSWAP16(val) \
((uint16)( \
(((uint16)(val) & (uint16)0x00ffU) << 8) | \
(((uint16)(val) & (uint16)0xff00U) >> 8) ))
/* Byte swap a 32 bit value */
#define BCMSWAP32(val) \
((uint32)( \
(((uint32)(val) & (uint32)0x000000ffUL) << 24) | \
(((uint32)(val) & (uint32)0x0000ff00UL) << 8) | \
(((uint32)(val) & (uint32)0x00ff0000UL) >> 8) | \
(((uint32)(val) & (uint32)0xff000000UL) >> 24) ))
static INLINE uint16
bcmswap16(uint16 val)
{
return BCMSWAP16(val);
}
static INLINE uint32
bcmswap32(uint32 val)
{
return BCMSWAP32(val);
}
/* buf - start of buffer of shorts to swap */
/* len - byte length of buffer */
static INLINE void
bcmswap16_buf(uint16 *buf, uint len)
{
len = len/2;
while(len--){
*buf = bcmswap16(*buf);
buf++;
}
}
#ifndef hton16
#ifndef IL_BIGENDIAN
#define HTON16(i) BCMSWAP16(i)
#define hton16(i) bcmswap16(i)
#define hton32(i) bcmswap32(i)
#define ntoh16(i) bcmswap16(i)
#define ntoh32(i) bcmswap32(i)
#define ltoh16(i) (i)
#define ltoh32(i) (i)
#define htol16(i) (i)
#define htol32(i) (i)
#else
#define HTON16(i) (i)
#define hton16(i) (i)
#define hton32(i) (i)
#define ntoh16(i) (i)
#define ntoh32(i) (i)
#define ltoh16(i) bcmswap16(i)
#define ltoh32(i) bcmswap32(i)
#define htol16(i) bcmswap16(i)
#define htol32(i) bcmswap32(i)
#endif
#endif
#ifndef IL_BIGENDIAN
#define ltoh16_buf(buf, i)
#define htol16_buf(buf, i)
#else
#define ltoh16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
#define htol16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
#endif
/*
* load 16-bit value from unaligned little endian byte array.
*/
static INLINE uint16
ltoh16_ua(uint8 *bytes)
{
return (bytes[1]<<8)+bytes[0];
}
/*
* load 32-bit value from unaligned little endian byte array.
*/
static INLINE uint32
ltoh32_ua(uint8 *bytes)
{
return (bytes[3]<<24)+(bytes[2]<<16)+(bytes[1]<<8)+bytes[0];
}
/*
* load 16-bit value from unaligned big(network) endian byte array.
*/
static INLINE uint16
ntoh16_ua(uint8 *bytes)
{
return (bytes[0]<<8)+bytes[1];
}
/*
* load 32-bit value from unaligned big(network) endian byte array.
*/
static INLINE uint32
ntoh32_ua(uint8 *bytes)
{
return (bytes[0]<<24)+(bytes[1]<<16)+(bytes[2]<<8)+bytes[3];
}
/* get_ua adapted from Linux asm-mips/unaligned.h */
#ifdef IL_BIGENDIAN
#define get_ua(ptr) \
({ \
__typeof__(*(ptr)) __val; \
\
switch (sizeof(*(ptr))) { \
case 1: \
__val = *(uint8 *)ptr; \
break; \
case 2: \
__val = ntoh16_ua((uint8 *)ptr); \
break; \
case 4: \
__val = ntoh32_ua((uint8 *)ptr); \
break; \
} \
\
__val; \
})
#else
#define get_ua(ptr) \
({ \
__typeof__(*(ptr)) __val; \
\
switch (sizeof(*(ptr))) { \
case 1: \
__val = *(uint8 *)ptr; \
break; \
case 2: \
__val = ltoh16_ua((uint8 *)ptr); \
break; \
case 4: \
__val = ltoh32_ua((uint8 *)ptr); \
break; \
} \
\
__val; \
})
#endif
#endif /* _BCMENDIAN_H_ */
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