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+/*
+ * Copyright (c) 2012-2013 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: Thomas Grocutt
+ */
+
+#ifndef __ARCH_ARM_STAGE2_MMU_HH__
+#define __ARCH_ARM_STAGE2_MMU_HH__
+
+#include "arch/arm/faults.hh"
+#include "arch/arm/tlb.hh"
+#include "mem/request.hh"
+#include "params/ArmStage2MMU.hh"
+#include "sim/eventq.hh"
+
+namespace ArmISA {
+
+class Stage2MMU : public SimObject
+{
+ private:
+ TLB *_stage1Tlb;
+ /** The TLB that will cache the stage 2 look ups. */
+ TLB *_stage2Tlb;
+
+ public:
+ /** This translation class is used to trigger the data fetch once a timing
+ translation returns the translated physical address */
+ class Stage2Translation : public BaseTLB::Translation
+ {
+ private:
+ uint8_t *data;
+ int numBytes;
+ Request req;
+ Event *event;
+ Stage2MMU &parent;
+ Addr oVAddr;
+
+ public:
+ Fault fault;
+
+ Stage2Translation(Stage2MMU &_parent, uint8_t *_data, Event *_event,
+ Addr _oVAddr);
+
+ void
+ markDelayed() {}
+
+ void
+ finish(Fault fault, RequestPtr req, ThreadContext *tc,
+ BaseTLB::Mode mode);
+
+ void setVirt(Addr vaddr, int size, Request::Flags flags, int masterId)
+ {
+ numBytes = size;
+ req.setVirt(0, vaddr, size, flags, masterId, 0);
+ }
+
+ Fault translateTiming(ThreadContext *tc)
+ {
+ return (parent.stage2Tlb()->translateTiming(&req, tc, this, BaseTLB::Read));
+ }
+ };
+
+ typedef ArmStage2MMUParams Params;
+ Stage2MMU(const Params *p);
+
+ Fault readDataUntimed(ThreadContext *tc, Addr oVAddr, Addr descAddr,
+ uint8_t *data, int numBytes, Request::Flags flags, int masterId,
+ bool isFunctional);
+ Fault readDataTimed(ThreadContext *tc, Addr descAddr,
+ Stage2Translation *translation, int numBytes, Request::Flags flags,
+ int masterId);
+
+ TLB* stage1Tlb() const { return _stage1Tlb; }
+ TLB* stage2Tlb() const { return _stage2Tlb; }
+};
+
+
+
+} // namespace ArmISA
+
+#endif //__ARCH_ARM_STAGE2_MMU_HH__
+