src/mem/fs_translating_port_proxy.cc

   1 /*
   2  * Copyright (c) 2011,2013 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) 2006 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: Ali Saidi
  41  *          Andreas Hansson
  42  */
  43
  44 /**
  45  * @file
  46  * Port object definitions.
  47  */
  48
  49 #include "mem/fs_translating_port_proxy.hh"
  50
  51 #include "arch/vtophys.hh"
  52 #include "base/chunk_generator.hh"
  53 #include "cpu/base.hh"
  54 #include "cpu/thread_context.hh"
  55 #include "sim/system.hh"
  56
  57 using namespace TheISA;
  58
  59 FSTranslatingPortProxy::FSTranslatingPortProxy(ThreadContext *tc)
  60     : PortProxy(tc->getCpuPtr()->getDataPort(),
  61                 tc->getSystemPtr()->cacheLineSize()), _tc(tc)
  62 {
  63 }
  64
  65 FSTranslatingPortProxy::FSTranslatingPortProxy(MasterPort &port,
  66                                                unsigned int cacheLineSize)
  67     : PortProxy(port, cacheLineSize), _tc(NULL)
  68 {
  69 }
  70
  71 FSTranslatingPortProxy::~FSTranslatingPortProxy()
  72 {
  73 }
  74
  75 void
  76 FSTranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
  77 {
  78     Addr paddr;
  79     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  80          gen.next())
  81     {
  82         if (_tc)
  83             paddr = TheISA::vtophys(_tc,gen.addr());
  84         else
  85             paddr = TheISA::vtophys(gen.addr());
  86
  87         PortProxy::readBlob(paddr, p, gen.size());
  88         p += gen.size();
  89     }
  90 }
  91
  92 void
  93 FSTranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const
  94 {
  95     Addr paddr;
  96     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  97          gen.next())
  98     {
  99         if (_tc)
 100             paddr = TheISA::vtophys(_tc,gen.addr());
 101         else
 102             paddr = TheISA::vtophys(gen.addr());
 103
 104         PortProxy::writeBlob(paddr, p, gen.size());
 105         p += gen.size();
 106     }
 107 }
 108
 109 void
 110 FSTranslatingPortProxy::memsetBlob(Addr address, uint8_t v, int size) const
 111 {
 112     Addr paddr;
 113     for (ChunkGenerator gen(address, size, TheISA::PageBytes); !gen.done();
 114          gen.next())
 115     {
 116         if (_tc)
 117             paddr = TheISA::vtophys(_tc,gen.addr());
 118         else
 119             paddr = TheISA::vtophys(gen.addr());
 120
 121         PortProxy::memsetBlob(paddr, v, gen.size());
 122     }
 123 }
 124
 125 void
 126 CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
 127 {
 128     uint8_t *dst = (uint8_t *)dest;
 129     tc->getVirtProxy().readBlob(src, dst, cplen);
 130 }
 131
 132 void
 133 CopyIn(ThreadContext *tc, Addr dest, const void *source, size_t cplen)
 134 {
 135     uint8_t *src = (uint8_t *)source;
 136     tc->getVirtProxy().writeBlob(dest, src, cplen);
 137 }
 138
 139 void
 140 CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
 141 {
 142     char *start = dst;
 143     FSTranslatingPortProxy &vp = tc->getVirtProxy();
 144
 145     bool foundNull = false;
 146     while ((dst - start + 1) < maxlen && !foundNull) {
 147         vp.readBlob(vaddr++, (uint8_t*)dst, 1);
 148         if (*dst == '\0')
 149             foundNull = true;
 150         dst++;
 151     }
 152
 153     if (!foundNull)
 154         *dst = '\0';
 155 }
 156
 157 void
 158 CopyStringIn(ThreadContext *tc, const char *src, Addr vaddr)
 159 {
 160     FSTranslatingPortProxy &vp = tc->getVirtProxy();
 161     for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
 162          gen.next())
 163     {
 164         vp.writeBlob(gen.addr(), (uint8_t*)src, gen.size());
 165         src += gen.size();
 166     }
 167 }