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[kvm-unit-tests,v8,07/10] libcflat: add IS_ALIGNED() macro, and page sizes

Message ID 20161208175030.12269-8-drjones@redhat.com
State New
Headers show

Commit Message

Andrew Jones Dec. 8, 2016, 5:50 p.m. UTC 
From: Peter Xu <peterx@redhat.com>


These macros will be useful to do page alignment checks.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Reviewed-by: Eric Auger <eric.auger@redhat.com>

Signed-off-by: Peter Xu <peterx@redhat.com>

[drew: also added SZ_64K and changed to shifts]
Signed-off-by: Andrew Jones <drjones@redhat.com>


---
v6: change to shifts [Alex]
---
 lib/libcflat.h | 6 ++++++
 1 file changed, 6 insertions(+)

-- 
2.9.3
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Patch

diff --git a/lib/libcflat.h b/lib/libcflat.h
index 15dbcadc6c7a..e636705e12b3 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -33,6 +33,12 @@ 
 #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 #define __ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x))(a) - 1)
 #define ALIGN(x, a)		__ALIGN((x), (a))
+#define IS_ALIGNED(x, a)	(((x) & ((typeof(x))(a) - 1)) == 0)
+
+#define SZ_4K			(1 << 12)
+#define SZ_64K			(1 << 16)
+#define SZ_2M			(1 << 21)
+#define SZ_1G			(1 << 30)
 
 typedef uint8_t		u8;
 typedef int8_t		s8;