ARM: Implement the ARM TLB/Tablewalker. Needs performance improvements.

1 files changed, 27 insertions, 2 deletions

diff --git a/src/arch/arm/ArmTLB.py b/src/arch/arm/ArmTLB.py
index 3dd2560fe..f0d23445f 100644
--- a/src/arch/arm/ArmTLB.py
+++ b/src/arch/arm/ArmTLB.py
@@ -1,8 +1,17 @@
 # -*- mode:python -*-
 
-# Copyright (c) 2007-2008 The Florida State University
+# Copyright (c) 2009 ARM Limited
 # All rights reserved.
 #
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder.  You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met: redistributions of source code must retain the above copyright
@@ -26,12 +35,28 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
-# Authors: Stephen Hines
+# Authors: Ali Saidi
 
+from m5.defines import buildEnv
 from m5.SimObject import SimObject
 from m5.params import *
+from m5.proxy import *
+
+if buildEnv['FULL_SYSTEM']:
+    from MemObject import MemObject
+
+    class ArmTableWalker(MemObject):
+        type = 'ArmTableWalker'
+        cxx_class = 'ArmISA::TableWalker'
+        port = Port("Port for TableWalker to do walk the translation with")
+        sys = Param.System(Parent.any, "system object parameter")
+        min_backoff = Param.Tick(0, "Minimum backoff delay after failed send")
+        max_backoff = Param.Tick(100000, "Minimum backoff delay after failed send")
+
 
 class ArmTLB(SimObject):
     type = 'ArmTLB'
     cxx_class = 'ArmISA::TLB'
     size = Param.Int(64, "TLB size")
+    if buildEnv['FULL_SYSTEM']:
+       walker = Param.ArmTableWalker(ArmTableWalker(), "HW Table walker")