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
  41 #include "mem/se_translating_port_proxy.hh"
  42
  43 #include <string>
  44
  45 #include "arch/isa_traits.hh"
  46 #include "base/chunk_generator.hh"
  47 #include "config/the_isa.hh"
  48 #include "mem/page_table.hh"
  49 #include "sim/process.hh"
  50 #include "sim/system.hh"
  51
  52 using namespace TheISA;
  53
  54 SETranslatingPortProxy::SETranslatingPortProxy(
  55         SendFunctionalFunc func, Process *p, AllocType alloc)
  56     : PortProxy(func, p->system->cacheLineSize()), pTable(p->pTable),
  57       process(p), allocating(alloc)
  58 { }
  59 SETranslatingPortProxy::SETranslatingPortProxy(MasterPort &port,
  60                                                Process *p, AllocType alloc)
  61     : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable),
  62       process(p), allocating(alloc)
  63 { }
  64
  65 bool
  66 SETranslatingPortProxy::tryReadBlob(Addr addr, void *p, int size) const
  67 {
  68     int prevSize = 0;
  69     auto *bytes = static_cast<uint8_t *>(p);
  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::readBlobPhys(paddr, 0, bytes + prevSize, gen.size());
  78         prevSize += gen.size();
  79     }
  80
  81     return true;
  82 }
  83
  84
  85 bool
  86 SETranslatingPortProxy::tryWriteBlob(Addr addr, const void *p, int size) const
  87 {
  88     int prevSize = 0;
  89     auto *bytes = static_cast<const uint8_t *>(p);
  90
  91     for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
  92         Addr paddr;
  93
  94         if (!pTable->translate(gen.addr(), paddr)) {
  95             if (allocating == Always) {
  96                 process->allocateMem(roundDown(gen.addr(), PageBytes),
  97                                      PageBytes);
  98             } else if (allocating == NextPage) {
  99                 // check if we've accessed the next page on the stack
 100                 if (!process->fixupStackFault(gen.addr()))
 101                     panic("Page table fault when accessing virtual address %#x "
 102                             "during functional write\n", gen.addr());
 103             } else {
 104                 return false;
 105             }
 106             pTable->translate(gen.addr(), paddr);
 107         }
 108
 109         PortProxy::writeBlobPhys(paddr, 0, bytes + prevSize, gen.size());
 110         prevSize += gen.size();
 111     }
 112
 113     return true;
 114 }
 115
 116
 117 bool
 118 SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const
 119 {
 120     for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
 121         Addr paddr;
 122
 123         if (!pTable->translate(gen.addr(), paddr)) {
 124             if (allocating == Always) {
 125                 process->allocateMem(roundDown(gen.addr(), PageBytes),
 126                                      PageBytes);
 127                 pTable->translate(gen.addr(), paddr);
 128             } else {
 129                 return false;
 130             }
 131         }
 132
 133         PortProxy::memsetBlobPhys(paddr, 0, val, gen.size());
 134     }
 135
 136     return true;
 137 }