[PATCH 2/5] common: add ALIGN_DOWN macro

[Alexander Aring]

Signed-off-by: Alexander Aring <alex.aring at gmail.com>
---
 include/common.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/common.h b/include/common.h
index 293ca49..fc2c8ca 100644
--- a/include/common.h
+++ b/include/common.h
@@ -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)
 
-- 
1.8.3