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Diffstat (limited to 'bsps/sparc64/include/kernel/align.h')
-rw-r--r-- | bsps/sparc64/include/kernel/align.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/bsps/sparc64/include/kernel/align.h b/bsps/sparc64/include/kernel/align.h new file mode 100644 index 0000000000..6003ea9c4e --- /dev/null +++ b/bsps/sparc64/include/kernel/align.h @@ -0,0 +1,59 @@ +/* + * 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. + */ + +/** @addtogroup generic + * @ingroup others + * @{ + */ +/** + * @file + * @brief Macros for making values and addresses aligned. + */ + +#ifndef KERN_ALIGN_H_ +#define KERN_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)) + +#endif + +/** @} + */ |