se_translating_port_proxy.cc revision 8706
1/* 2 * Copyright (c) 2011 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 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2001-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ron Dreslinski 41 * Steve Reinhardt 42 * Andreas Hansson 43 */ 44 45#include <string> 46 47#include "base/chunk_generator.hh" 48#include "config/the_isa.hh" 49#include "mem/page_table.hh" 50#include "mem/se_translating_port_proxy.hh" 51#include "sim/process.hh" 52 53using namespace TheISA; 54 55SETranslatingPortProxy::SETranslatingPortProxy(Port& port, Process *p, 56 AllocType alloc) 57 : PortProxy(port), pTable(p->pTable), process(p), 58 allocating(alloc) 59{ } 60 61SETranslatingPortProxy::~SETranslatingPortProxy() 62{ } 63 64bool 65SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size) 66{ 67 Addr paddr; 68 int prevSize = 0; 69 70 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 71 72 if (!pTable->translate(gen.addr(),paddr)) 73 return false; 74 75 PortProxy::readBlob(paddr, p + prevSize, gen.size()); 76 prevSize += gen.size(); 77 } 78 79 return true; 80} 81 82void 83SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) 84{ 85 if (!tryReadBlob(addr, p, size)) 86 fatal("readBlob(0x%x, ...) failed", addr); 87} 88 89 90bool 91SETranslatingPortProxy::tryWriteBlob(Addr addr, uint8_t *p, int size) 92{ 93 94 Addr paddr; 95 int prevSize = 0; 96 97 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 98 99 if (!pTable->translate(gen.addr(), paddr)) { 100 if (allocating == Always) { 101 process->allocateMem(roundDown(gen.addr(), VMPageSize), 102 VMPageSize); 103 } else if (allocating == NextPage) { 104 // check if we've accessed the next page on the stack 105 if (!process->fixupStackFault(gen.addr())) 106 panic("Page table fault when accessing virtual address %#x " 107 "during functional write\n", gen.addr()); 108 } else { 109 return false; 110 } 111 pTable->translate(gen.addr(), paddr); 112 } 113 114 PortProxy::writeBlob(paddr, p + prevSize, gen.size()); 115 prevSize += gen.size(); 116 } 117 118 return true; 119} 120 121 122void 123SETranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size) 124{ 125 if (!tryWriteBlob(addr, p, size)) 126 fatal("writeBlob(0x%x, ...) failed", addr); 127} 128 129bool 130SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) 131{ 132 Addr paddr; 133 134 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { 135 136 if (!pTable->translate(gen.addr(), paddr)) { 137 if (allocating == Always) { 138 process->allocateMem(roundDown(gen.addr(), VMPageSize), 139 VMPageSize); 140 pTable->translate(gen.addr(), paddr); 141 } else { 142 return false; 143 } 144 } 145 146 PortProxy::memsetBlob(paddr, val, gen.size()); 147 } 148 149 return true; 150} 151 152void 153SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size) 154{ 155 if (!tryMemsetBlob(addr, val, size)) 156 fatal("memsetBlob(0x%x, ...) failed", addr); 157} 158 159 160bool 161SETranslatingPortProxy::tryWriteString(Addr addr, const char *str) 162{ 163 Addr paddr,vaddr; 164 uint8_t c; 165 166 vaddr = addr; 167 168 do { 169 c = *str++; 170 if (!pTable->translate(vaddr++,paddr)) 171 return false; 172 173 PortProxy::writeBlob(paddr, &c, 1); 174 } while (c); 175 176 return true; 177} 178 179void 180SETranslatingPortProxy::writeString(Addr addr, const char *str) 181{ 182 if (!tryWriteString(addr, str)) 183 fatal("writeString(0x%x, ...) failed", addr); 184} 185 186bool 187SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) 188{ 189 Addr paddr,vaddr; 190 uint8_t c; 191 192 vaddr = addr; 193 194 do { 195 if (!pTable->translate(vaddr++,paddr)) 196 return false; 197 198 PortProxy::readBlob(paddr, &c, 1); 199 str += c; 200 } while (c); 201 202 return true; 203} 204 205void 206SETranslatingPortProxy::readString(std::string &str, Addr addr) 207{ 208 if (!tryReadString(str, addr)) 209 fatal("readString(0x%x, ...) failed", addr); 210} 211 212