/* * Copyright (c) 2005 Jakub Jermar * 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /** * @file * @brief Macros for making values and addresses aligned. */ #ifndef BOOT_ALIGN_H_ #define BOOT_ALIGN_H_ /** Align to the nearest lower address. * * @param s Address or size to be aligned. * @param a Size of alignment, must be power of 2. */ #define ALIGN_DOWN(s, a) ((s) & ~((a) - 1)) /** Align to the nearest higher address. * * @param s Address or size to be aligned. * @param a Size of alignment, must be power of 2. */ #define ALIGN_UP(s, a) (((s) + ((a) - 1)) & ~((a) - 1)) /** Check alignment. * * @param s Address or size to be checked for alignment. * @param a Size of alignment, must be a power of 2. */ #define IS_ALIGNED(s, a) (ALIGN_UP((s), (a)) == (s)) #endif /** @} */