From 1f032ad3452c2514287c142fb3faf953a5682ea3 Mon Sep 17 00:00:00 2001
From: Gene Wu <Gene.Wu@arm.com>
Date: Mon, 23 Aug 2010 11:18:41 -0500
Subject: ARM: Implement CLREX

---
 src/arch/arm/tlb.cc | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/arch/arm/tlb.cc')

diff --git a/src/arch/arm/tlb.cc b/src/arch/arm/tlb.cc
index 9cc00a89e..b7e951767 100644
--- a/src/arch/arm/tlb.cc
+++ b/src/arch/arm/tlb.cc
@@ -355,6 +355,13 @@ TLB::translateFs(RequestPtr req, ThreadContext *tc, Mode mode,
 
     DPRINTF(TLBVerbose, "CPSR is user:%d UserMode:%d\n", cpsr.mode == MODE_USER, flags
             & UserMode);
+    // If this is a clrex instruction, provide a PA of 0 with no fault
+    // This will force the monitor to set the tracked address to 0
+    // a bit of a hack but this effectively clrears this processors monitor
+    if (flags & Clrex){
+       req->setPaddr(0);
+       return NoFault;
+    }
     if (!is_fetch) {
         assert(flags & MustBeOne);
         if (sctlr.a || !(flags & AllowUnaligned)) {
-- 
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