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