diff -r 685dca39de9e -r 74929d9b9431 src/arch/x86/tlb.cc
--- a/src/arch/x86/tlb.cc	Sat Feb 26 01:42:52 2011 -0800
+++ b/src/arch/x86/tlb.cc	Sat Feb 26 01:43:10 2011 -0800
@@ -518,6 +518,8 @@
                 req->setPaddr(PhysAddrPrefixPciConfig |
                         mbits(configAddress, 30, 2) |
                         (IOPort & mask(2)));
+            } else {
+                req->setPaddr(PhysAddrPrefixIO | IOPort);
             }
         } else {
             req->setFlags(Request::UNCACHEABLE);