Merge pull request #1422 from Yann-lms/genmask
Genmask
diff --git a/include/lib/utils_def.h b/include/lib/utils_def.h
index 31b1294..7335103 100644
--- a/include/lib/utils_def.h
+++ b/include/lib/utils_def.h
@@ -16,7 +16,31 @@
#define SIZE_FROM_LOG2_WORDS(n) (4 << (n))
-#define BIT(nr) (ULL(1) << (nr))
+#define BIT_32(nr) (U(1) << (nr))
+#define BIT_64(nr) (ULL(1) << (nr))
+
+#ifdef AARCH32
+#define BIT BIT_32
+#else
+#define BIT BIT_64
+#endif
+
+/*
+ * Create a contiguous bitmask starting at bit position @l and ending at
+ * position @h. For example
+ * GENMASK_64(39, 21) gives us the 64bit vector 0x000000ffffe00000.
+ */
+#define GENMASK_32(h, l) \
+ (((~UINT32_C(0)) << (l)) & (~UINT32_C(0) >> (32 - 1 - (h))))
+
+#define GENMASK_64(h, l) \
+ (((~UINT64_C(0)) << (l)) & (~UINT64_C(0) >> (64 - 1 - (h))))
+
+#ifdef AARCH32
+#define GENMASK GENMASK_32
+#else
+#define GENMASK GENMASK_64
+#endif
/*
* This variant of div_round_up can be used in macro definition but should not