kern/include/endian.h

/* Copyright (c) 2010 The Regents of the University of California
 * Barret Rhoden <brho@cs.berkeley.edu>
 * See LICENSE for details.
 *
 * Macros to convert to and from endian-data */

#pragma once

#include <ros/common.h>
#include <arch/endian.h>

/* Endian-generic versions.  Let the compiler figure it out, plan 9-style */
#define l16get(p)	(((p)[1]<<8)|(p)[0])
#define l32get(p)	(((uint32_t)l16get(p+2)<<16)|l16get(p))
#define l64get(p)	(((uint64_t)l32get(p+4)<<32)|l32get(p))

#ifdef LITTLE_ENDIAN

#define __LITTLE_ENDIAN

#define cpu_to_le16(x) ((uint16_t)(x))
#define cpu_to_le32(x) ((uint32_t)(x))
#define cpu_to_le64(x) ((uint64_t)(x))
#define le16_to_cpu(x) ((uint16_t)(x))
#define le32_to_cpu(x) ((uint32_t)(x))
#define le64_to_cpu(x) ((uint64_t)(x))

#define cpu_to_be16(x) byte_swap16((x))
#define cpu_to_be32(x) byte_swap32((x))
#define cpu_to_be64(x) byte_swap64((x))
#define be16_to_cpu(x) byte_swap16((x))
#define be32_to_cpu(x) byte_swap32((x))
#define be64_to_cpu(x) byte_swap64((x))

#define PP_HTONS(x) ((((x) & 0xff) << 8) | (((x) & 0xff00) >> 8))
#define PP_NTOHS(x) PP_HTONS(x)
#define PP_HTONL(x) ((((x) & 0xff) << 24) | \
                     (((x) & 0xff00) << 8) | \
                     (((x) & 0xff0000UL) >> 8) | \
                     (((x) & 0xff000000UL) >> 24))
#define PP_NTOHL(x) PP_HTONL(x)

#else /* big endian */

# ifndef BIG_ENDIAN
# error "Need an endianness defined"
# endif

#define __BIG_ENDIAN

#define cpu_to_le16(x) byte_swap16((x))
#define cpu_to_le32(x) byte_swap32((x))
#define cpu_to_le64(x) byte_swap64((x))
#define le16_to_cpu(x) byte_swap16((x))
#define le32_to_cpu(x) byte_swap32((x))
#define le64_to_cpu(x) byte_swap64((x))

#define cpu_to_be16(x) ((uint16_t)(x))
#define cpu_to_be32(x) ((uint32_t)(x))
#define cpu_to_be64(x) ((uint64_t)(x))
#define be16_to_cpu(x) ((uint16_t)(x))
#define be32_to_cpu(x) ((uint32_t)(x))
#define be64_to_cpu(x) ((uint64_t)(x))

#define PP_HTONS(x) (x)
#define PP_NTOHS(x) (x)
#define PP_HTONL(x) (x)
#define PP_NTOHL(x) (x)

#endif /* endian */