/*

 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * Redistribution and use in source and binary forms, with or without modification,

 * are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 *

 * 3. Neither the name of the copyright holder nor the names of its contributors

 *    may be used to endorse or promote products derived from this software without

 *    specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef	_PSIF_ENDIAN_H

#define	_PSIF_ENDIAN_H

#if defined(__arm__)

#undef HOST_BIG_ENDIAN

#define HOST_LITTLE_ENDIAN

#else /* __arm__ */

#if defined(__KERNEL__)

#  if defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)

#    define HOST_BIG_ENDIAN

#  elif defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN)

#    define HOST_LITTLE_ENDIAN

#  else

#    error "could not determine byte order"

#  endif

#else /* defined(__KERNEL__) */

#  include <assert.h>

#  include "os_header.h"

#  if defined(__BYTE_ORDER)

#    if __BYTE_ORDER == __BIG_ENDIAN

#      define HOST_BIG_ENDIAN

#    elif __BYTE_ORDER == __LITTLE_ENDIAN

#      define HOST_LITTLE_ENDIAN

#    else

#      error "could not determine byte order"

#    endif

#  else /* defined(__BYTE_ORDER) */

#    error "could not determine byte order"

#  endif

#endif /* defined(__KERNEL__) */

#endif

#if !defined (__KERNEL__)

#if !defined(__arm__)

#include <stdlib.h>

#endif /* !__arm__ */

#if defined(HOST_BIG_ENDIAN)

#define copy_convert(dest,src,n) { memcpy((void *)dest, (void const *)(src), n); wmb(); }

#define copy_convert_to_hw(dest,src,n) copy_convert(dest,src,n)

#define copy_convert_to_sw(dest,src,n) copy_convert(dest,src,n)

#else /* HOST_LITTLE_ENDIAN */

#if defined(__arm__)

#include <assert.h>

#include <stdint.h>

#include "epsfw_misc.h"

#define htobe64(x) eps_htobe64(x)

#define u64 uint64_t

static inline void __DSB(void) {

    /* __dsb() doesn't serve as sequence point in armcc so adding

     * __schedule_barrier() around it to force the compiler to see it as a

     * sequence point */

    __schedule_barrier();

    __dsb(0xf);

    __schedule_barrier();

}

#define wmb() __DSB();

/*

 * Alternatively, use this one as barrier?

 * #define wmb() __memory_changed();

 */

#endif /* __arm__ */

static inline void _copy_convert(void *dest, void const *src, size_t n)

{

	int           i, words = n / 8;

	assert((n % 8) == 0);

	volatile u64       *dp = (volatile u64       *) dest;

	const volatile u64 *sp = (const volatile u64 *) src;

	for (i = 0; i < words; i++) {

		*dp++ = htobe64(*sp);

		sp++;

	}

	wmb();

}

static inline void _copy_convert_to_hw(volatile void *dest, void const *src, size_t n)

{

	int           i, words = n / 8;

	assert((n % 8) == 0);

	volatile u64 *dp = (volatile u64 *) dest;

	const u64    *sp = (const u64    *) src;

	for (i = 0; i < words; i++) {

		*dp++ = htobe64(*sp);

		sp++;

	}

	wmb();

}

static inline void _copy_convert_to_sw(void *dest, volatile void const *src, size_t n)

{

	int           i, words = n / 8;

	assert((n % 8) == 0);

	u64                *dp = (u64                *) dest;

	const volatile u64 *sp = (const volatile u64 *) src;

	for (i = 0; i < words; i++) {

		*dp++ = htobe64(*sp);

		sp++;

	}

	wmb();

}

#define copy_convert(dest,src,n) _copy_convert(dest,src,n)

#define copy_convert_to_hw(dest,src,n) _copy_convert_to_hw(dest,src,n)

#define copy_convert_to_sw(dest,src,n) _copy_convert_to_sw(dest,src,n)

#endif /* HOST_ENDIAN */

#endif /* !__KERNEL__ */

#endif	/* _PSIF_ENDIAN_H */