From d8a34a9745d652b6e4484cf227754e7f23e48879 Mon Sep 17 00:00:00 2001
From: Korey Sewell <ksewell@umich.edu>
Date: Sat, 18 Apr 2009 10:42:29 -0400
Subject: [PATCH] mips-tlb-fix: check for alignment faults.\nMIPS was never
 updated to use TLBS correcty in SE mode. The error was forwarding
 translations directly to pageTable. The TLB should check for alignment faults
 at bare minimum here but in the long run we should be using TLBs in SE mode
 for MIPS.

---
 src/arch/mips/tlb.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/arch/mips/tlb.cc b/src/arch/mips/tlb.cc
index 9fc3e20ee..001dc2cb7 100644
--- a/src/arch/mips/tlb.cc
+++ b/src/arch/mips/tlb.cc
@@ -427,6 +427,18 @@ Fault
 TLB::translateData(RequestPtr req, ThreadContext *tc, bool write)
 {
 #if !FULL_SYSTEM
+    //@TODO: This should actually use TLB instead of going directly
+    //       to the page table in syscall mode.
+    /**
+     * Check for alignment faults
+     */
+    if (req->getVaddr() & (req->getSize() - 1)) {
+        DPRINTF(TLB, "Alignment Fault on %#x, size = %d", req->getVaddr(),
+                req->getSize());
+        return new AlignmentFault();
+    }
+
+
     Process * p = tc->getProcessPtr();
 
     Fault fault = p->pTable->translate(req);