ruby: correct computation of number of bits required for address

The number of bits required for an address was set to floorLog2(memory size).
This is correct under the assumption that the memory size is a power of 2,
which is not always true. Hence, floorLog2 is being replaced with ceilLog2.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mem/ruby/system/System.cc b/src/mem/ruby/system/System.cc
index 6a0721217..01e50ef0b 100644
--- a/src/mem/ruby/system/System.cc
+++ b/src/mem/ruby/system/System.cc
@@ -69,7 +69,7 @@ RubySystem::RubySystem(const Params *p)
     if (m_memory_size_bytes == 0) {
         m_memory_size_bits = 0;
     } else {
-        m_memory_size_bits = floorLog2(m_memory_size_bytes);
+        m_memory_size_bits = ceilLog2(m_memory_size_bytes);
     }
 
     g_system_ptr = this;