ARM: Add I/O devices for booting linux

--HG--
rename : src/dev/arm/Versatile.py => src/dev/arm/RealView.py
rename : src/dev/arm/versatile.cc => src/dev/arm/realview.cc
rename : src/dev/arm/versatile.hh => src/dev/arm/realview.hh

1 files changed, 22 insertions, 0 deletions

diff --git a/src/base/intmath.hh b/src/base/intmath.hh
index a2960e750..b8c83f05a 100644
--- a/src/base/intmath.hh
+++ b/src/base/intmath.hh
@@ -33,6 +33,7 @@
 
 #include <cassert>
 
+#include "base/misc.hh"
 #include "base/types.hh"
 
 // Returns the prime number one less than n.
@@ -74,6 +75,27 @@ isPowerOf2(T n)
     return n != 0 && leastSigBit(n) == n;
 }
 
+inline uint64_t
+power(uint32_t n, uint32_t e)
+{
+    if (e > 20)
+        warn("Warning, power() function is quite slow for large exponents\n");
+
+    if (e == 0)
+        return 1;
+
+    uint64_t result = n;
+    uint64_t old_result = 0;
+    for (int x = 1; x < e; x++) {
+        old_result = result;
+        result *= n;
+        if (old_result > result)
+            warn("power() overflowed!\n");
+    }
+    return result;
+}
+
+
 inline int
 floorLog2(unsigned x)
 {