se_translating_port_proxy.cc revision 11793:ef606668d247
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 "mem/se_translating_port_proxy.hh" 46 47#include <string> 48 49#include "arch/isa_traits.hh" 50#include "base/chunk_generator.hh" 51#include "config/the_isa.hh" 52#include "mem/page_table.hh" 53#include "sim/process.hh" 54#include "sim/system.hh" 55 56using namespace TheISA; 57 58SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p, 59 AllocType alloc) 60 : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable), 61 process(p), allocating(alloc) 62{ } 63 64SETranslatingPortProxy::~SETranslatingPortProxy() 65{ } 66 67bool 68SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size) const 69{ 70 int prevSize = 0; 71 72 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 73 Addr paddr; 74 75 if (!pTable->translate(gen.addr(),paddr)) 76 return false; 77 78 PortProxy::readBlob(paddr, p + prevSize, gen.size()); 79 prevSize += gen.size(); 80 } 81 82 return true; 83} 84 85void 86SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const 87{ 88 if (!tryReadBlob(addr, p, size)) 89 fatal("readBlob(0x%x, ...) failed", addr); 90} 91 92 93bool 94SETranslatingPortProxy::tryWriteBlob(Addr addr, const uint8_t *p, 95 int size) const 96{ 97 int prevSize = 0; 98 99 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 100 Addr paddr; 101 102 if (!pTable->translate(gen.addr(), paddr)) { 103 if (allocating == Always) { 104 process->allocateMem(roundDown(gen.addr(), PageBytes), 105 PageBytes); 106 } else if (allocating == NextPage) { 107 // check if we've accessed the next page on the stack 108 if (!process->fixupStackFault(gen.addr())) 109 panic("Page table fault when accessing virtual address %#x " 110 "during functional write\n", gen.addr()); 111 } else { 112 return false; 113 } 114 pTable->translate(gen.addr(), paddr); 115 } 116 117 PortProxy::writeBlob(paddr, p + prevSize, gen.size()); 118 prevSize += gen.size(); 119 } 120 121 return true; 122} 123 124 125void 126SETranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const 127{ 128 if (!tryWriteBlob(addr, p, size)) 129 fatal("writeBlob(0x%x, ...) failed", addr); 130} 131 132bool 133SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const 134{ 135 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 136 Addr paddr; 137 138 if (!pTable->translate(gen.addr(), paddr)) { 139 if (allocating == Always) { 140 process->allocateMem(roundDown(gen.addr(), PageBytes), 141 PageBytes); 142 pTable->translate(gen.addr(), paddr); 143 } else { 144 return false; 145 } 146 } 147 148 PortProxy::memsetBlob(paddr, val, gen.size()); 149 } 150 151 return true; 152} 153 154void 155SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size) const 156{ 157 if (!tryMemsetBlob(addr, val, size)) 158 fatal("memsetBlob(0x%x, ...) failed", addr); 159} 160 161 162bool 163SETranslatingPortProxy::tryWriteString(Addr addr, const char *str) const 164{ 165 uint8_t c; 166 167 Addr vaddr = addr; 168 169 do { 170 c = *str++; 171 Addr paddr; 172 173 if (!pTable->translate(vaddr++, paddr)) 174 return false; 175 176 PortProxy::writeBlob(paddr, &c, 1); 177 } while (c); 178 179 return true; 180} 181 182void 183SETranslatingPortProxy::writeString(Addr addr, const char *str) const 184{ 185 if (!tryWriteString(addr, str)) 186 fatal("writeString(0x%x, ...) failed", addr); 187} 188 189bool 190SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) const 191{ 192 uint8_t c; 193 194 Addr vaddr = addr; 195 196 while (true) { 197 Addr paddr; 198 199 if (!pTable->translate(vaddr++, paddr)) 200 return false; 201 202 PortProxy::readBlob(paddr, &c, 1); 203 if (c == '\0') 204 break; 205 206 str += c; 207 } 208 209 return true; 210} 211 212void 213SETranslatingPortProxy::readString(std::string &str, Addr addr) const 214{ 215 if (!tryReadString(str, addr)) 216 fatal("readString(0x%x, ...) failed", addr); 217} 218 219