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/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Intel Corporation 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
 *   OWNER 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 _RTE_PREFETCH_H_
#define _RTE_PREFETCH_H_

/**
 * @file
 *
 * Prefetch operations.
 *
 * This file defines an API for prefetch macros / inline-functions,
 * which are architecture-dependent. Prefetching occurs when a
 * processor requests an instruction or data from memory to cache
 * before it is actually needed, potentially speeding up the execution of the
 * program.
 */

/**
 * Prefetch a cache line into all cache levels.
 * @param p
 *   Address to prefetch
 */
static inline void rte_prefetch0(const volatile void *p);

/**
 * Prefetch a cache line into all cache levels except the 0th cache level.
 * @param p
 *   Address to prefetch
 */
static inline void rte_prefetch1(const volatile void *p);

/**
 * Prefetch a cache line into all cache levels except the 0th and 1th cache
 * levels.
 * @param p
 *   Address to prefetch
 */
static inline void rte_prefetch2(const volatile void *p);

#endif /* _RTE_PREFETCH_H_ */