Add cache handling functions

[qemu.git] / qemu-common.h

diff --git a/qemu-common.h b/qemu-common.h
index f16079f432ba07cc5122e697a4a0c347d465435a..ff7026e377806efbde1999a08670754d57204a59 100644 (file)
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -1,3 +1,4 @@
+
 /* Common header file that is included by all of qemu.  */
 #ifndef QEMU_COMMON_H
 #define QEMU_COMMON_H
@@ -428,6 +429,18 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 /* Round number up to multiple */
 #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
 
+static inline bool is_power_of_2(uint64_t value)
+{
+    if (!value) {
+        return 0;
+    }
+
+    return !(value & (value - 1));
+}
+
+/* round down to the nearest power of 2*/
+int64_t pow2floor(int64_t value);
+
 #include "module.h"
 
 #endif