se_translating_port_proxy.cc revision 6658
1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ron Dreslinski 29 * Steve Reinhardt 30 */ 31 32#include <string> 33 34#include "base/chunk_generator.hh" 35#include "config/the_isa.hh" 36#include "mem/port.hh" 37#include "mem/translating_port.hh" 38#include "mem/page_table.hh" 39#include "sim/process.hh" 40 41using namespace TheISA; 42 43TranslatingPort::TranslatingPort(const std::string &_name, 44 Process *p, AllocType alloc) 45 : FunctionalPort(_name), pTable(p->pTable), process(p), 46 allocating(alloc) 47{ } 48 49TranslatingPort::~TranslatingPort() 50{ } 51 52bool 53TranslatingPort::tryReadBlob(Addr addr, uint8_t *p, int size) 54{ 55 Addr paddr; 56 int prevSize = 0; 57 58 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 59 60 if (!pTable->translate(gen.addr(),paddr)) 61 return false; 62 63 Port::readBlob(paddr, p + prevSize, gen.size()); 64 prevSize += gen.size(); 65 } 66 67 return true; 68} 69 70void 71TranslatingPort::readBlob(Addr addr, uint8_t *p, int size) 72{ 73 if (!tryReadBlob(addr, p, size)) 74 fatal("readBlob(0x%x, ...) failed", addr); 75} 76 77 78bool 79TranslatingPort::tryWriteBlob(Addr addr, uint8_t *p, int size) 80{ 81 82 Addr paddr; 83 int prevSize = 0; 84 85 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 86 87 if (!pTable->translate(gen.addr(), paddr)) { 88 if (allocating == Always) { 89 pTable->allocate(roundDown(gen.addr(), VMPageSize), 90 VMPageSize); 91 } else if (allocating == NextPage) { 92 // check if we've accessed the next page on the stack 93 if (!process->checkAndAllocNextPage(gen.addr())) 94 panic("Page table fault when accessing virtual address %#x " 95 "during functional write\n", gen.addr()); 96 } else { 97 return false; 98 } 99 pTable->translate(gen.addr(), paddr); 100 } 101 102 Port::writeBlob(paddr, p + prevSize, gen.size()); 103 prevSize += gen.size(); 104 } 105 106 return true; 107} 108 109 110void 111TranslatingPort::writeBlob(Addr addr, uint8_t *p, int size) 112{ 113 if (!tryWriteBlob(addr, p, size)) 114 fatal("writeBlob(0x%x, ...) failed", addr); 115} 116 117bool 118TranslatingPort::tryMemsetBlob(Addr addr, uint8_t val, int size) 119{ 120 Addr paddr; 121 122 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 123 124 if (!pTable->translate(gen.addr(), paddr)) { 125 if (allocating == Always) { 126 pTable->allocate(roundDown(gen.addr(), VMPageSize), 127 VMPageSize); 128 pTable->translate(gen.addr(), paddr); 129 } else { 130 return false; 131 } 132 } 133 134 Port::memsetBlob(paddr, val, gen.size()); 135 } 136 137 return true; 138} 139 140void 141TranslatingPort::memsetBlob(Addr addr, uint8_t val, int size) 142{ 143 if (!tryMemsetBlob(addr, val, size)) 144 fatal("memsetBlob(0x%x, ...) failed", addr); 145} 146 147 148bool 149TranslatingPort::tryWriteString(Addr addr, const char *str) 150{ 151 Addr paddr,vaddr; 152 uint8_t c; 153 154 vaddr = addr; 155 156 do { 157 c = *str++; 158 if (!pTable->translate(vaddr++,paddr)) 159 return false; 160 161 Port::writeBlob(paddr, &c, 1); 162 } while (c); 163 164 return true; 165} 166 167void 168TranslatingPort::writeString(Addr addr, const char *str) 169{ 170 if (!tryWriteString(addr, str)) 171 fatal("writeString(0x%x, ...) failed", addr); 172} 173 174bool 175TranslatingPort::tryReadString(std::string &str, Addr addr) 176{ 177 Addr paddr,vaddr; 178 uint8_t c; 179 180 vaddr = addr; 181 182 do { 183 if (!pTable->translate(vaddr++,paddr)) 184 return false; 185 186 Port::readBlob(paddr, &c, 1); 187 str += c; 188 } while (c); 189 190 return true; 191} 192 193void 194TranslatingPort::readString(std::string &str, Addr addr) 195{ 196 if (!tryReadString(str, addr)) 197 fatal("readString(0x%x, ...) failed", addr); 198} 199 200