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 --- 26 unchanged lines hidden (view full) --- 35 * @file 36 * Definitions of functional page table. 37 */ 38#include "mem/page_table.hh" 39 40#include <string> 41 42#include "base/trace.hh" |
43#include "debug/MMU.hh" 44#include "sim/faults.hh" 45#include "sim/serialize.hh" 46 47using namespace std; |
48 |
49void 50EmulationPageTable::map(Addr vaddr, Addr paddr, int64_t size, uint64_t flags) 51{ 52 bool clobber = flags & Clobber; 53 // starting address must be page aligned 54 assert(pageOffset(vaddr) == 0); 55 56 DPRINTF(MMU, "Allocating Page: %#x-%#x\n", vaddr, vaddr + size); 57 58 while (size > 0) { 59 auto it = pTable.find(vaddr); 60 if (it != pTable.end()) { |
61 // already mapped 62 panic_if(!clobber, 63 "EmulationPageTable::allocate: addr %#x already mapped", 64 vaddr); 65 it->second = Entry(paddr, flags); |
66 } else { |
67 pTable.emplace(vaddr, Entry(paddr, flags)); |
68 } 69 |
70 size -= pageSize; 71 vaddr += pageSize; 72 paddr += pageSize; 73 } 74} 75 76void 77EmulationPageTable::remap(Addr vaddr, int64_t size, Addr new_vaddr) --- 6 unchanged lines hidden (view full) --- 84 85 while (size > 0) { 86 auto new_it = pTable.find(new_vaddr); 87 auto old_it = pTable.find(vaddr); 88 assert(old_it != pTable.end() && new_it == pTable.end()); 89 90 new_it->second = old_it->second; 91 pTable.erase(old_it); |
92 size -= pageSize; 93 vaddr += pageSize; 94 new_vaddr += pageSize; 95 } 96} 97 98void 99EmulationPageTable::getMappings(std::vector<std::pair<Addr, Addr>> *addr_maps) 100{ 101 for (auto &iter : pTable) |
102 addr_maps->push_back(make_pair(iter.first, iter.second.paddr)); |
103} 104 105void 106EmulationPageTable::unmap(Addr vaddr, int64_t size) 107{ 108 assert(pageOffset(vaddr) == 0); 109 |
110 DPRINTF(MMU, "Unmapping page: %#x-%#x\n", vaddr, vaddr + size); |
111 112 while (size > 0) { 113 auto it = pTable.find(vaddr); 114 assert(it != pTable.end()); |
115 pTable.erase(it); 116 size -= pageSize; 117 vaddr += pageSize; 118 } 119} 120 121bool 122EmulationPageTable::isUnmapped(Addr vaddr, int64_t size) 123{ 124 // starting address must be page aligned 125 assert(pageOffset(vaddr) == 0); 126 127 for (int64_t offset = 0; offset < size; offset += pageSize) 128 if (pTable.find(vaddr + offset) != pTable.end()) 129 return false; 130 131 return true; 132} 133 |
134const EmulationPageTable::Entry * |
135EmulationPageTable::lookup(Addr vaddr) 136{ 137 Addr page_addr = pageAlign(vaddr); 138 PTableItr iter = pTable.find(page_addr); 139 if (iter == pTable.end()) 140 return nullptr; |
141 return &(iter->second); |
142} 143 144bool 145EmulationPageTable::translate(Addr vaddr, Addr &paddr) 146{ |
147 const Entry *entry = lookup(vaddr); |
148 if (!entry) { 149 DPRINTF(MMU, "Couldn't Translate: %#x\n", vaddr); 150 return false; 151 } |
152 paddr = pageOffset(vaddr) + entry->paddr; |
153 DPRINTF(MMU, "Translating: %#x->%#x\n", vaddr, paddr); 154 return true; 155} 156 157Fault 158EmulationPageTable::translate(RequestPtr req) 159{ 160 Addr paddr; --- 14 unchanged lines hidden (view full) --- 175{ 176 paramOut(cp, "ptable.size", pTable.size()); 177 178 PTable::size_type count = 0; 179 for (auto &pte : pTable) { 180 ScopedCheckpointSection sec(cp, csprintf("Entry%d", count++)); 181 182 paramOut(cp, "vaddr", pte.first); |
183 paramOut(cp, "paddr", pte.second.paddr); 184 paramOut(cp, "flags", pte.second.flags); |
185 } 186 assert(count == pTable.size()); 187} 188 189void 190EmulationPageTable::unserialize(CheckpointIn &cp) 191{ 192 int count; 193 paramIn(cp, "ptable.size", count); 194 195 for (int i = 0; i < count; ++i) { 196 ScopedCheckpointSection sec(cp, csprintf("Entry%d", i)); 197 |
198 Addr vaddr; |
199 UNSERIALIZE_SCALAR(vaddr); 200 Addr paddr; 201 uint64_t flags; 202 UNSERIALIZE_SCALAR(paddr); 203 UNSERIALIZE_SCALAR(flags); |
204 |
205 pTable.emplace(vaddr, Entry(paddr, flags)); |
206 } 207} 208 |