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 FSTranslatingPortProxy::FSTranslatingPortProxy(ThreadContext *tc)
  58     : PortProxy(tc->getCpuPtr()->getDataPort(),
  59                 tc->getSystemPtr()->cacheLineSize()), _tc(tc)
  60 {
  61 }
  62
  63 FSTranslatingPortProxy::FSTranslatingPortProxy(MasterPort &port,
  64                                                unsigned int cacheLineSize)
  65     : PortProxy(port, cacheLineSize), _tc(NULL)
  66 {
  67 }
  68
  69 FSTranslatingPortProxy::~FSTranslatingPortProxy()
  70 {
  71 }
  72
  73 void
  74 FSTranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
  75 {
  76     Addr paddr;
  77     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  78          gen.next())
  79     {
  80         if (_tc)
  81             paddr = TheISA::vtophys(_tc,gen.addr());
  82         else
  83             paddr = TheISA::vtophys(gen.addr());
  84
  85         PortProxy::readBlobPhys(paddr, 0, p, gen.size());
  86         p += gen.size();
  87     }
  88 }
  89
  90 void
  91 FSTranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const
  92 {
  93     Addr paddr;
  94     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  95          gen.next())
  96     {
  97         if (_tc)
  98             paddr = TheISA::vtophys(_tc,gen.addr());
  99         else
 100             paddr = TheISA::vtophys(gen.addr());
 101
 102         PortProxy::writeBlobPhys(paddr, 0, p, gen.size());
 103         p += gen.size();
 104     }
 105 }
 106
 107 void
 108 FSTranslatingPortProxy::memsetBlob(Addr address, uint8_t v, int size) const
 109 {
 110     Addr paddr;
 111     for (ChunkGenerator gen(address, size, TheISA::PageBytes); !gen.done();
 112          gen.next())
 113     {
 114         if (_tc)
 115             paddr = TheISA::vtophys(_tc,gen.addr());
 116         else
 117             paddr = TheISA::vtophys(gen.addr());
 118
 119         PortProxy::memsetBlobPhys(paddr, 0, v, gen.size());
 120     }
 121 }
 122
 123 void
 124 CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
 125 {
 126     uint8_t *dst = (uint8_t *)dest;
 127     tc->getVirtProxy().readBlob(src, dst, cplen);
 128 }
 129
 130 void
 131 CopyIn(ThreadContext *tc, Addr dest, const void *source, size_t cplen)
 132 {
 133     uint8_t *src = (uint8_t *)source;
 134     tc->getVirtProxy().writeBlob(dest, src, cplen);
 135 }
 136
 137 void
 138 CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
 139 {
 140     char *start = dst;
 141     FSTranslatingPortProxy &vp = tc->getVirtProxy();
 142
 143     bool foundNull = false;
 144     while ((dst - start + 1) < maxlen && !foundNull) {
 145         vp.readBlob(vaddr++, (uint8_t*)dst, 1);
 146         if (*dst == '\0')
 147             foundNull = true;
 148         dst++;
 149     }
 150
 151     if (!foundNull)
 152         *dst = '\0';
 153 }
 154
 155 void
 156 CopyStringIn(ThreadContext *tc, const char *src, Addr vaddr)
 157 {
 158     FSTranslatingPortProxy &vp = tc->getVirtProxy();
 159     for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
 160          gen.next())
 161     {
 162         vp.writeBlob(gen.addr(), (uint8_t*)src, gen.size());
 163         src += gen.size();
 164     }
 165 }