4b32c9fb4d
This patch adds a function to X86 tlb that returns the walker port. This port is required for correctly connecting the walker ports for the cpu just switched in
205 lines
7.1 KiB
C++
205 lines
7.1 KiB
C++
/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#ifndef __ARCH_X86_PAGE_TABLE_WALKER_HH__
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#define __ARCH_X86_PAGE_TABLE_WALKER_HH__
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#include <vector>
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#include "arch/x86/pagetable.hh"
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#include "arch/x86/tlb.hh"
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#include "base/fast_alloc.hh"
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#include "base/types.hh"
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#include "mem/mem_object.hh"
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#include "mem/packet.hh"
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#include "params/X86PagetableWalker.hh"
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#include "sim/faults.hh"
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#include "sim/system.hh"
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class ThreadContext;
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namespace X86ISA
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{
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class Walker : public MemObject
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{
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protected:
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// Port for accessing memory
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class WalkerPort : public Port
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{
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public:
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WalkerPort(const std::string &_name, Walker * _walker) :
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Port(_name, _walker), walker(_walker)
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{}
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protected:
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Walker *walker;
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bool recvTiming(PacketPtr pkt);
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Tick recvAtomic(PacketPtr pkt);
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void recvFunctional(PacketPtr pkt);
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void recvRangeChange();
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void recvRetry();
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bool isSnooping() { return true; }
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};
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friend class WalkerPort;
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WalkerPort port;
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// State to track each walk of the page table
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class WalkerState : public FastAlloc
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{
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private:
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enum State {
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Ready,
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Waiting,
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// Long mode
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LongPML4, LongPDP, LongPD, LongPTE,
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// PAE legacy mode
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PAEPDP, PAEPD, PAEPTE,
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// Non PAE legacy mode with and without PSE
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PSEPD, PD, PTE
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};
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protected:
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Walker *walker;
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ThreadContext *tc;
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RequestPtr req;
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State state;
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State nextState;
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int dataSize;
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bool enableNX;
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unsigned inflight;
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TlbEntry entry;
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PacketPtr read;
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std::vector<PacketPtr> writes;
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Fault timingFault;
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TLB::Translation * translation;
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BaseTLB::Mode mode;
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bool functional;
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bool timing;
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bool retrying;
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bool started;
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public:
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WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
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RequestPtr _req, bool _isFunctional = false) :
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walker(_walker), req(_req), state(Ready),
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nextState(Ready), inflight(0),
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translation(_translation),
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functional(_isFunctional), timing(false),
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retrying(false), started(false)
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{
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}
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void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
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bool _isTiming = false);
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Fault startWalk();
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Fault startFunctional(Addr &addr, Addr &pageSize);
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bool recvPacket(PacketPtr pkt);
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bool isRetrying();
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bool wasStarted();
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bool isTiming();
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void retry();
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std::string name() const {return walker->name();}
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private:
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void setupWalk(Addr vaddr);
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Fault stepWalk(PacketPtr &write);
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void sendPackets();
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void endWalk();
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Fault pageFault(bool present);
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};
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friend class WalkerState;
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// State for timing and atomic accesses (need multiple per walker in
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// the case of multiple outstanding requests in timing mode)
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std::list<WalkerState *> currStates;
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// State for functional accesses (only need one of these per walker)
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WalkerState funcState;
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struct WalkerSenderState : public Packet::SenderState
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{
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WalkerState * senderWalk;
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Packet::SenderState * saved;
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WalkerSenderState(WalkerState * _senderWalk,
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Packet::SenderState * _saved) :
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senderWalk(_senderWalk), saved(_saved) {}
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};
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public:
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// Kick off the state machine.
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Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
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RequestPtr req, BaseTLB::Mode mode);
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Fault startFunctional(ThreadContext * _tc, Addr &addr,
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Addr &pageSize, BaseTLB::Mode mode);
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Port *getPort(const std::string &if_name, int idx = -1);
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protected:
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// The TLB we're supposed to load.
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TLB * tlb;
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System * sys;
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MasterID masterId;
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// Functions for dealing with packets.
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bool recvTiming(PacketPtr pkt);
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void recvRetry();
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bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
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public:
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void setTLB(TLB * _tlb)
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{
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tlb = _tlb;
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}
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typedef X86PagetableWalkerParams Params;
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const Params *
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params() const
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{
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return static_cast<const Params *>(_params);
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}
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Walker(const Params *params) :
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MemObject(params), port(name() + ".port", this),
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funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
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masterId(sys->getMasterId(name()))
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{
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}
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};
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}
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#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
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