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common: add ALIGN_DOWN macro 

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Alexander Aring 2013-06-04 01:13:49 +02:00 committed by Sascha Hauer
parent 71218359af
commit 49686838a9
1 changed files with 1 additions and 0 deletions
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include/common.h
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@ -184,6 +184,7 @@ int run_shell(void);
#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1)
#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
#define ALIGN_DOWN(x, a) ((x) & ~((typeof(x))(a) - 1))
#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)