se_translating_port_proxy.cc revision 10564:a8c16e2d466a
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 "arch/isa_traits.hh" 48#include "base/chunk_generator.hh" 49#include "config/the_isa.hh" 50#include "mem/page_table.hh" 51#include "mem/se_translating_port_proxy.hh" 52#include "sim/process.hh" 53#include "sim/system.hh" 54 55using namespace TheISA; 56 57SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p, 58 AllocType alloc) 59 : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable), 60 process(p), allocating(alloc) 61{ } 62 63SETranslatingPortProxy::~SETranslatingPortProxy() 64{ } 65 66bool 67SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size) const 68{ 69 int prevSize = 0; 70 71 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 72 Addr paddr; 73 74 if (!pTable->translate(gen.addr(),paddr)) 75 return false; 76 77 PortProxy::readBlob(paddr, p + prevSize, gen.size()); 78 prevSize += gen.size(); 79 } 80 81 return true; 82} 83 84void 85SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const 86{ 87 if (!tryReadBlob(addr, p, size)) 88 fatal("readBlob(0x%x, ...) failed", addr); 89} 90 91 92bool 93SETranslatingPortProxy::tryWriteBlob(Addr addr, const uint8_t *p, 94 int size) const 95{ 96 int prevSize = 0; 97 98 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 99 Addr paddr; 100 101 if (!pTable->translate(gen.addr(), paddr)) { 102 if (allocating == Always) { 103 process->allocateMem(roundDown(gen.addr(), PageBytes), 104 PageBytes); 105 } else if (allocating == NextPage) { 106 // check if we've accessed the next page on the stack 107 if (!process->fixupStackFault(gen.addr())) 108 panic("Page table fault when accessing virtual address %#x " 109 "during functional write\n", gen.addr()); 110 } else { 111 return false; 112 } 113 pTable->translate(gen.addr(), paddr); 114 } 115 116 PortProxy::writeBlob(paddr, p + prevSize, gen.size()); 117 prevSize += gen.size(); 118 } 119 120 return true; 121} 122 123 124void 125SETranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const 126{ 127 if (!tryWriteBlob(addr, p, size)) 128 fatal("writeBlob(0x%x, ...) failed", addr); 129} 130 131bool 132SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const 133{ 134 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 135 Addr paddr; 136 137 if (!pTable->translate(gen.addr(), paddr)) { 138 if (allocating == Always) { 139 process->allocateMem(roundDown(gen.addr(), PageBytes), 140 PageBytes); 141 pTable->translate(gen.addr(), paddr); 142 } else { 143 return false; 144 } 145 } 146 147 PortProxy::memsetBlob(paddr, val, gen.size()); 148 } 149 150 return true; 151} 152 153void 154SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size) const 155{ 156 if (!tryMemsetBlob(addr, val, size)) 157 fatal("memsetBlob(0x%x, ...) failed", addr); 158} 159 160 161bool 162SETranslatingPortProxy::tryWriteString(Addr addr, const char *str) const 163{ 164 uint8_t c; 165 166 Addr vaddr = addr; 167 168 do { 169 c = *str++; 170 Addr paddr; 171 172 if (!pTable->translate(vaddr++, paddr)) 173 return false; 174 175 PortProxy::writeBlob(paddr, &c, 1); 176 } while (c); 177 178 return true; 179} 180 181void 182SETranslatingPortProxy::writeString(Addr addr, const char *str) const 183{ 184 if (!tryWriteString(addr, str)) 185 fatal("writeString(0x%x, ...) failed", addr); 186} 187 188bool 189SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) const 190{ 191 uint8_t c; 192 193 Addr vaddr = addr; 194 195 while (true) { 196 Addr paddr; 197 198 if (!pTable->translate(vaddr++, paddr)) 199 return false; 200 201 PortProxy::readBlob(paddr, &c, 1); 202 if (c == '\0') 203 break; 204 205 str += c; 206 } 207 208 return true; 209} 210 211void 212SETranslatingPortProxy::readString(std::string &str, Addr addr) const 213{ 214 if (!tryReadString(str, addr)) 215 fatal("readString(0x%x, ...) failed", addr); 216} 217 218