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Diffstat (limited to 'src/arch/arm/stage2_mmu.hh')
-rwxr-xr-x | src/arch/arm/stage2_mmu.hh | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/arch/arm/stage2_mmu.hh b/src/arch/arm/stage2_mmu.hh new file mode 100755 index 000000000..d1812c4ed --- /dev/null +++ b/src/arch/arm/stage2_mmu.hh @@ -0,0 +1,115 @@ +/* + * 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__ + |