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, 108 insertions, 0 deletions

diff --git a/src/arch/arm/stage2_lookup.hh b/src/arch/arm/stage2_lookup.hh
new file mode 100755
index 000000000..3a1228f46
--- /dev/null
+++ b/src/arch/arm/stage2_lookup.hh
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2010-2013 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
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (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: Ali Saidi
+ *          Giacomo Gabrielli
+ */
+
+#ifndef __ARCH_ARM_STAGE2_LOOKUP_HH__
+#define __ARCH_ARM_STAGE2_LOOKUP_HH__
+
+#include <list>
+
+#include "arch/arm/system.hh"
+#include "arch/arm/table_walker.hh"
+#include "arch/arm/tlb.hh"
+#include "mem/request.hh"
+#include "sim/tlb.hh"
+
+class ThreadContext;
+
+namespace ArmISA {
+class Translation;
+class TLB;
+
+
+class Stage2LookUp : public BaseTLB::Translation
+{
+  private:
+    TLB                     *stage1Tlb;
+    TLB               *stage2Tlb;
+    TlbEntry                stage1Te;
+    RequestPtr              s1Req;
+    TLB::Translation        *transState;
+    BaseTLB::Mode           mode;
+    bool                    timing;
+    bool                    functional;
+    TLB::ArmTranslationType tranType;
+    TlbEntry                *stage2Te;
+    Request                 req;
+    Fault                   fault;
+    bool                    complete;
+    bool                    selfDelete;
+
+  public:
+    Stage2LookUp(TLB *s1Tlb, TLB *s2Tlb, TlbEntry s1Te, RequestPtr _req,
+        TLB::Translation *_transState, BaseTLB::Mode _mode, bool _timing,
+        bool _functional, TLB::ArmTranslationType _tranType) :
+        stage1Tlb(s1Tlb), stage2Tlb(s2Tlb), stage1Te(s1Te), s1Req(_req),
+        transState(_transState), mode(_mode), timing(_timing),
+        functional(_functional), tranType(_tranType), fault(NoFault),
+        complete(false), selfDelete(false)
+    {
+        req.setVirt(0, s1Te.pAddr(s1Req->getVaddr()), s1Req->getSize(),
+                    s1Req->getFlags(), s1Req->masterId(), 0);
+    }
+
+    Fault getTe(ThreadContext *tc, TlbEntry *destTe);
+
+    void mergeTe(RequestPtr req, BaseTLB::Mode mode);
+
+    void setSelfDelete() { selfDelete = true; }
+
+    bool isComplete() const { return complete; }
+
+    void markDelayed() {}
+
+    void finish(Fault fault, RequestPtr req, ThreadContext *tc,
+                BaseTLB::Mode mode);
+};
+
+
+} // namespace ArmISA
+
+#endif //__ARCH_ARM_STAGE2_LOOKUP_HH__
+