pagetable_walker.cc (10241:1444f2ee67d7) pagetable_walker.cc (10299:bec0c5ffc323)
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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58#include "cpu/base.hh"
59#include "cpu/thread_context.hh"
60#include "debug/PageTableWalker.hh"
61#include "mem/packet_access.hh"
62#include "mem/request.hh"
63
64namespace X86ISA {
65
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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58#include "cpu/base.hh"
59#include "cpu/thread_context.hh"
60#include "debug/PageTableWalker.hh"
61#include "mem/packet_access.hh"
62#include "mem/request.hh"
63
64namespace X86ISA {
65
66// Unfortunately, the placement of the base field in a page table entry is
67// very erratic and would make a mess here. It might be moved here at some
68// point in the future.
69BitUnion64(PageTableEntry)
70 Bitfield<63> nx;
71 Bitfield<11, 9> avl;
72 Bitfield<8> g;
73 Bitfield<7> ps;
74 Bitfield<6> d;
75 Bitfield<5> a;
76 Bitfield<4> pcd;
77 Bitfield<3> pwt;
78 Bitfield<2> u;
79 Bitfield<1> w;
80 Bitfield<0> p;
81EndBitUnion(PageTableEntry)
82
83Fault
84Walker::start(ThreadContext * _tc, BaseTLB::Translation *_translation,
85 RequestPtr _req, BaseTLB::Mode _mode)
86{
87 // TODO: in timing mode, instead of blocking when there are other
88 // outstanding requests, see if this request can be coalesced with
89 // another one (i.e. either coalesce or start walk)
90 WalkerState * newState = new WalkerState(this, _translation, _req);

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67Walker::start(ThreadContext * _tc, BaseTLB::Translation *_translation,
68 RequestPtr _req, BaseTLB::Mode _mode)
69{
70 // TODO: in timing mode, instead of blocking when there are other
71 // outstanding requests, see if this request can be coalesced with
72 // another one (i.e. either coalesce or start walk)
73 WalkerState * newState = new WalkerState(this, _translation, _req);

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