se_translating_port_proxy.cc revision 10318:98771a936b61
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, uint8_t *p, int size) const 94{ 95 int prevSize = 0; 96 97 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 98 Addr paddr; 99 100 if (!pTable->translate(gen.addr(), paddr)) { 101 if (allocating == Always) { 102 process->allocateMem(roundDown(gen.addr(), PageBytes), 103 PageBytes); 104 } else if (allocating == NextPage) { 105 // check if we've accessed the next page on the stack 106 if (!process->fixupStackFault(gen.addr())) 107 panic("Page table fault when accessing virtual address %#x " 108 "during functional write\n", gen.addr()); 109 } else { 110 return false; 111 } 112 pTable->translate(gen.addr(), paddr); 113 } 114 115 PortProxy::writeBlob(paddr, p + prevSize, gen.size()); 116 prevSize += gen.size(); 117 } 118 119 return true; 120} 121 122 123void 124SETranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size) const 125{ 126 if (!tryWriteBlob(addr, p, size)) 127 fatal("writeBlob(0x%x, ...) failed", addr); 128} 129 130bool 131SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const 132{ 133 for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) { 134 Addr paddr; 135 136 if (!pTable->translate(gen.addr(), paddr)) { 137 if (allocating == Always) { 138 process->allocateMem(roundDown(gen.addr(), PageBytes), 139 PageBytes); 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) const 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) const 162{ 163 uint8_t c; 164 165 Addr vaddr = addr; 166 167 do { 168 c = *str++; 169 Addr paddr; 170 171 if (!pTable->translate(vaddr++, paddr)) 172 return false; 173 174 PortProxy::writeBlob(paddr, &c, 1); 175 } while (c); 176 177 return true; 178} 179 180void 181SETranslatingPortProxy::writeString(Addr addr, const char *str) const 182{ 183 if (!tryWriteString(addr, str)) 184 fatal("writeString(0x%x, ...) failed", addr); 185} 186 187bool 188SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) const 189{ 190 uint8_t c; 191 192 Addr vaddr = addr; 193 194 while (true) { 195 Addr paddr; 196 197 if (!pTable->translate(vaddr++, paddr)) 198 return false; 199 200 PortProxy::readBlob(paddr, &c, 1); 201 if (c == '\0') 202 break; 203 204 str += c; 205 } 206 207 return true; 208} 209 210void 211SETranslatingPortProxy::readString(std::string &str, Addr addr) const 212{ 213 if (!tryReadString(str, addr)) 214 fatal("readString(0x%x, ...) failed", addr); 215} 216 217