arm: Add support for ARMv8 (AArch64 & AArch32)

Note: AArch64 and AArch32 interworking is not supported. If you use an AArch64
kernel you are restricted to AArch64 user-mode binaries. This will be addressed
in a later patch.

Note: Virtualization is only supported in AArch32 mode. This will also be fixed
in a later patch.

Contributors:
Giacomo Gabrielli    (TrustZone, LPAE, system-level AArch64, AArch64 NEON, validation)
Thomas Grocutt       (AArch32 Virtualization, AArch64 FP, validation)
Mbou Eyole           (AArch64 NEON, validation)
Ali Saidi            (AArch64 Linux support, code integration, validation)
Edmund Grimley-Evans (AArch64 FP)
William Wang         (AArch64 Linux support)
Rene De Jong         (AArch64 Linux support, performance opt.)
Matt Horsnell        (AArch64 MP, validation)
Matt Evans           (device models, code integration, validation)
Chris Adeniyi-Jones  (AArch64 syscall-emulation)
Prakash Ramrakhyani  (validation)
Dam Sunwoo           (validation)
Chander Sudanthi     (validation)
Stephan Diestelhorst (validation)
Andreas Hansson      (code integration, performance opt.)
Eric Van Hensbergen  (performance opt.)
Gabe Black

1 files changed, 28 insertions, 1 deletions

diff --git a/src/arch/arm/ArmTLB.py b/src/arch/arm/ArmTLB.py
index c70dd80c8..01ac8016a 100644
--- a/src/arch/arm/ArmTLB.py
+++ b/src/arch/arm/ArmTLB.py
@@ -1,6 +1,6 @@
 # -*- mode:python -*-
 
-# Copyright (c) 2009 ARM Limited
+# Copyright (c) 2009, 2013 ARM Limited
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
@@ -42,10 +42,12 @@ from m5.params import *
 from m5.proxy import *
 from MemObject import MemObject
 
+# Basic stage 1 translation objects
 class ArmTableWalker(MemObject):
     type = 'ArmTableWalker'
     cxx_class = 'ArmISA::TableWalker'
     cxx_header = "arch/arm/table_walker.hh"
+    is_stage2 =  Param.Bool(False, "Is this object for stage 2 translation?")
     port = MasterPort("Port for TableWalker to do walk the translation with")
     sys = Param.System(Parent.any, "system object parameter")
     num_squash_per_cycle = Param.Unsigned(2,
@@ -57,3 +59,28 @@ class ArmTLB(SimObject):
     cxx_header = "arch/arm/tlb.hh"
     size = Param.Int(64, "TLB size")
     walker = Param.ArmTableWalker(ArmTableWalker(), "HW Table walker")
+    is_stage2 = Param.Bool(False, "Is this a stage 2 TLB?")
+
+# Stage 2 translation objects, only used when virtualisation is being used
+class ArmStage2TableWalker(ArmTableWalker):
+    is_stage2 = True
+
+class ArmStage2TLB(ArmTLB):
+    size = 32
+    walker = ArmStage2TableWalker()
+    is_stage2 = True
+
+class ArmStage2MMU(SimObject):
+    type = 'ArmStage2MMU'
+    cxx_class = 'ArmISA::Stage2MMU'
+    cxx_header = 'arch/arm/stage2_mmu.hh'
+    tlb = Param.ArmTLB("Stage 1 TLB")
+    stage2_tlb = Param.ArmTLB("Stage 2 TLB")
+
+class ArmStage2IMMU(ArmStage2MMU):
+    tlb = Parent.itb
+    stage2_tlb = ArmStage2TLB(walker = ArmStage2TableWalker())
+
+class ArmStage2DMMU(ArmStage2MMU):
+    tlb = Parent.dtb
+    stage2_tlb = ArmStage2TLB(walker = ArmStage2TableWalker())