src/mem/vport.cc

   1 /*
   2  * Copyright (c) 2006 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Ali Saidi
  29  */
  30
  31 /**
  32  * @file
  33  * Port object definitions.
  34  */
  35
  36 #include "base/chunk_generator.hh"
  37 #include "cpu/thread_context.hh"
  38 #include "mem/vport.hh"
  39
  40 void
  41 VirtualPort::readBlob(Addr addr, uint8_t *p, int size)
  42 {
  43     Addr paddr;
  44     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  45             gen.next())
  46     {
  47         if (tc)
  48             paddr = TheISA::vtophys(tc,gen.addr());
  49         else
  50             paddr = TheISA::vtophys(gen.addr());
  51
  52         FunctionalPort::readBlob(paddr, p, gen.size());
  53         p += gen.size();
  54     }
  55 }
  56
  57 void
  58 VirtualPort::writeBlob(Addr addr, uint8_t *p, int size)
  59 {
  60     Addr paddr;
  61     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  62             gen.next())
  63     {
  64         if (tc)
  65             paddr = TheISA::vtophys(tc,gen.addr());
  66         else
  67             paddr = TheISA::vtophys(gen.addr());
  68
  69         FunctionalPort::writeBlob(paddr, p, gen.size());
  70         p += gen.size();
  71     }
  72 }
  73
  74 void
  75 CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
  76 {
  77     uint8_t *dst = (uint8_t *)dest;
  78     VirtualPort *vp = tc->getVirtPort();
  79
  80     vp->readBlob(src, dst, cplen);
  81 }
  82
  83 void
  84 CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen)
  85 {
  86     uint8_t *src = (uint8_t *)source;
  87     VirtualPort *vp = tc->getVirtPort();
  88
  89     vp->writeBlob(dest, src, cplen);
  90 }
  91
  92 void
  93 CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
  94 {
  95     int len = 0;
  96     char *start = dst;
  97     VirtualPort *vp = tc->getVirtPort();
  98
  99     do {
 100         vp->readBlob(vaddr++, (uint8_t*)dst++, 1);
 101     } while (len < maxlen && start[len++] != 0 );
 102
 103     dst[len] = 0;
 104 }
 105
 106 void
 107 CopyStringIn(ThreadContext *tc, char *src, Addr vaddr)
 108 {
 109     VirtualPort *vp = tc->getVirtPort();
 110     for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
 111             gen.next())
 112     {
 113         vp->writeBlob(gen.addr(), (uint8_t*)src, gen.size());
 114         src += gen.size();
 115     }
 116 }