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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/fast_alloc.hh"
48 #include "base/types.hh"
49 #include "mem/mem_object.hh"
50 #include "mem/packet.hh"
51 #include "params/X86PagetableWalker.hh"
52 #include "sim/faults.hh"
53 #include "sim/system.hh"
59 class Walker : public MemObject
62 // Port for accessing memory
63 class WalkerPort : public MasterPort
66 WalkerPort(const std::string &_name, Walker * _walker) :
67 MasterPort(_name, _walker), walker(_walker)
73 bool recvTiming(PacketPtr pkt);
74 Tick recvAtomic(PacketPtr pkt);
75 void recvFunctional(PacketPtr pkt);
77 bool isSnooping() const { return true; }
80 friend class WalkerPort;
83 // State to track each walk of the page table
84 class WalkerState : public FastAlloc
91 LongPML4, LongPDP, LongPD, LongPTE,
93 PAEPDP, PAEPD, PAEPTE,
94 // Non PAE legacy mode with and without PSE
109 std::vector<PacketPtr> writes;
111 TLB::Translation * translation;
118 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
119 RequestPtr _req, bool _isFunctional = false) :
120 walker(_walker), req(_req), state(Ready),
121 nextState(Ready), inflight(0),
122 translation(_translation),
123 functional(_isFunctional), timing(false),
124 retrying(false), started(false)
127 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
128 bool _isTiming = false);
130 Fault startFunctional(Addr &addr, Addr &pageSize);
131 bool recvPacket(PacketPtr pkt);
136 std::string name() const {return walker->name();}
139 void setupWalk(Addr vaddr);
140 Fault stepWalk(PacketPtr &write);
143 Fault pageFault(bool present);
146 friend class WalkerState;
147 // State for timing and atomic accesses (need multiple per walker in
148 // the case of multiple outstanding requests in timing mode)
149 std::list<WalkerState *> currStates;
150 // State for functional accesses (only need one of these per walker)
151 WalkerState funcState;
153 struct WalkerSenderState : public Packet::SenderState
155 WalkerState * senderWalk;
156 Packet::SenderState * saved;
157 WalkerSenderState(WalkerState * _senderWalk,
158 Packet::SenderState * _saved) :
159 senderWalk(_senderWalk), saved(_saved) {}
163 // Kick off the state machine.
164 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
165 RequestPtr req, BaseTLB::Mode mode);
166 Fault startFunctional(ThreadContext * _tc, Addr &addr,
167 Addr &pageSize, BaseTLB::Mode mode);
168 MasterPort &getMasterPort(const std::string &if_name, int idx = -1);
171 // The TLB we're supposed to load.
176 // Functions for dealing with packets.
177 bool recvTiming(PacketPtr pkt);
179 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
183 void setTLB(TLB * _tlb)
188 typedef X86PagetableWalkerParams Params;
193 return static_cast<const Params *>(_params);
196 Walker(const Params *params) :
197 MemObject(params), port(name() + ".port", this),
198 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
199 masterId(sys->getMasterId(name()))
204 #endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__