1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
3 * Copyright (c) 2003 The Regents of The University of Michigan
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

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35 */
36
37#ifndef __MEM_PAGE_TABLE_HH__
38#define __MEM_PAGE_TABLE_HH__
39
40#include <string>
41#include <unordered_map>
42
43#include "arch/isa_traits.hh"
44#include "arch/tlb.hh"
45#include "base/intmath.hh"
46#include "base/types.hh"
47#include "config/the_isa.hh"
48#include "mem/request.hh"
49#include "sim/serialize.hh"
50
51class ThreadContext;
52
53class EmulationPageTable : public Serializable
54{
55 protected:
56 typedef std::unordered_map<Addr, TheISA::TlbEntry *> PTable;
57 typedef PTable::iterator PTableItr;
58 PTable pTable;
59
60 const Addr pageSize;
61 const Addr offsetMask;
62
63 const uint64_t pid;
64 const std::string _name;
65
66 public:
67
68 EmulationPageTable(
69 const std::string &__name, uint64_t _pid, Addr _pageSize) :
70 pageSize(_pageSize), offsetMask(mask(floorLog2(_pageSize))),
71 pid(_pid), _name(__name)
72 {
73 assert(isPowerOf2(pageSize));
74 }
75
76 virtual ~EmulationPageTable();
77
78 /* generic page table mapping flags
79 * unset | set
80 * bit 0 - no-clobber | clobber
81 * bit 2 - cacheable | uncacheable
82 * bit 3 - read-write | read-only
83 */
84 enum MappingFlags : uint32_t {
85 Clobber = 1,

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115 */
116 virtual bool isUnmapped(Addr vaddr, int64_t size);
117
118 /**
119 * Lookup function
120 * @param vaddr The virtual address.
121 * @return The page table entry corresponding to vaddr.
122 */
123 virtual TheISA::TlbEntry *lookup(Addr vaddr);
124
125 /**
126 * Translate function
127 * @param vaddr The virtual address.
128 * @param paddr Physical address from translation.
129 * @return True if translation exists
130 */
131 bool translate(Addr vaddr, Addr &paddr);

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