src/mem/se_translating_port_proxy.cc

   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
  56 using namespace TheISA;
  57
  58 SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p,
  59                                            AllocType alloc)
  60     : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable),
  61       process(p), allocating(alloc)
  62 { }
  63
  64 SETranslatingPortProxy::~SETranslatingPortProxy()
  65 { }
  66
  67 bool
  68 SETranslatingPortProxy::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
  85 void
  86 SETranslatingPortProxy::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
  93 bool
  94 SETranslatingPortProxy::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
 125 void
 126 SETranslatingPortProxy::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
 132 bool
 133 SETranslatingPortProxy::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
 154 void
 155 SETranslatingPortProxy::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
 162 bool
 163 SETranslatingPortProxy::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
 182 void
 183 SETranslatingPortProxy::writeString(Addr addr, const char *str) const
 184 {
 185     if (!tryWriteString(addr, str))
 186         fatal("writeString(0x%x, ...) failed", addr);
 187 }
 188
 189 bool
 190 SETranslatingPortProxy::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
 212 void
 213 SETranslatingPortProxy::readString(std::string &str, Addr addr) const
 214 {
 215     if (!tryReadString(str, addr))
 216         fatal("readString(0x%x, ...) failed", addr);
 217 }
 218