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40 #ifndef __ARCH_X86_PAGE_TABLE_WALKER_HH__
41 #define __ARCH_X86_PAGE_TABLE_WALKER_HH__
45 #include "arch/x86/pagetable.hh"
46 #include "arch/x86/tlb.hh"
47 #include "base/types.hh"
48 #include "mem/mem_object.hh"
49 #include "mem/packet.hh"
50 #include "params/X86PagetableWalker.hh"
51 #include "sim/faults.hh"
52 #include "sim/system.hh"
58 class Walker : public MemObject
61 // Port for accessing memory
62 class WalkerPort : public MasterPort
65 WalkerPort(const std::string &_name, Walker * _walker) :
66 MasterPort(_name, _walker), walker(_walker)
72 bool recvTimingResp(PacketPtr pkt);
75 * Snooping a coherence request, do nothing.
77 void recvTimingSnoopReq(PacketPtr pkt) { }
78 Tick recvAtomicSnoop(PacketPtr pkt) { return 0; }
79 void recvFunctionalSnoop(PacketPtr pkt) { }
81 bool isSnooping() const { return true; }
84 friend class WalkerPort;
87 // State to track each walk of the page table
95 LongPML4, LongPDP, LongPD, LongPTE,
97 PAEPDP, PAEPD, PAEPTE,
98 // Non PAE legacy mode with and without PSE
113 std::vector<PacketPtr> writes;
115 TLB::Translation * translation;
122 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
123 RequestPtr _req, bool _isFunctional = false) :
124 walker(_walker), req(_req), state(Ready),
125 nextState(Ready), inflight(0),
126 translation(_translation),
127 functional(_isFunctional), timing(false),
128 retrying(false), started(false)
131 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
132 bool _isTiming = false);
134 Fault startFunctional(Addr &addr, unsigned &logBytes);
135 bool recvPacket(PacketPtr pkt);
140 std::string name() const {return walker->name();}
143 void setupWalk(Addr vaddr);
144 Fault stepWalk(PacketPtr &write);
147 Fault pageFault(bool present);
150 friend class WalkerState;
151 // State for timing and atomic accesses (need multiple per walker in
152 // the case of multiple outstanding requests in timing mode)
153 std::list<WalkerState *> currStates;
154 // State for functional accesses (only need one of these per walker)
155 WalkerState funcState;
157 struct WalkerSenderState : public Packet::SenderState
159 WalkerState * senderWalk;
160 Packet::SenderState * saved;
161 WalkerSenderState(WalkerState * _senderWalk,
162 Packet::SenderState * _saved) :
163 senderWalk(_senderWalk), saved(_saved) {}
167 // Kick off the state machine.
168 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
169 RequestPtr req, BaseTLB::Mode mode);
170 Fault startFunctional(ThreadContext * _tc, Addr &addr,
171 unsigned &logBytes, BaseTLB::Mode mode);
172 BaseMasterPort &getMasterPort(const std::string &if_name,
173 PortID idx = InvalidPortID);
176 // The TLB we're supposed to load.
181 // Functions for dealing with packets.
182 bool recvTimingResp(PacketPtr pkt);
184 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
188 void setTLB(TLB * _tlb)
193 typedef X86PagetableWalkerParams Params;
198 return static_cast<const Params *>(_params);
201 Walker(const Params *params) :
202 MemObject(params), port(name() + ".port", this),
203 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
204 masterId(sys->getMasterId(name()))
209 #endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__