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 "config/the_isa.hh"
  38 #include "cpu/thread_context.hh"
  39 #include "mem/vport.hh"
  40
  41 void
  42 VirtualPort::readBlob(Addr addr, uint8_t *p, int size)
  43 {
  44     Addr paddr;
  45     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  46             gen.next())
  47     {
  48         if (tc)
  49             paddr = TheISA::vtophys(tc,gen.addr());
  50         else
  51             paddr = TheISA::vtophys(gen.addr());
  52
  53         FunctionalPort::readBlob(paddr, p, gen.size());
  54         p += gen.size();
  55     }
  56 }
  57
  58 void
  59 VirtualPort::writeBlob(Addr addr, uint8_t *p, int size)
  60 {
  61     Addr paddr;
  62     for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
  63             gen.next())
  64     {
  65         if (tc)
  66             paddr = TheISA::vtophys(tc,gen.addr());
  67         else
  68             paddr = TheISA::vtophys(gen.addr());
  69
  70         FunctionalPort::writeBlob(paddr, p, gen.size());
  71         p += gen.size();
  72     }
  73 }
  74
  75 void
  76 CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
  77 {
  78     uint8_t *dst = (uint8_t *)dest;
  79     VirtualPort *vp = tc->getVirtPort();
  80
  81     vp->readBlob(src, dst, cplen);
  82 }
  83
  84 void
  85 CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen)
  86 {
  87     uint8_t *src = (uint8_t *)source;
  88     VirtualPort *vp = tc->getVirtPort();
  89
  90     vp->writeBlob(dest, src, cplen);
  91 }
  92
  93 void
  94 CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
  95 {
  96     int len = 0;
  97     char *start = dst;
  98     VirtualPort *vp = tc->getVirtPort();
  99
 100     do {
 101         vp->readBlob(vaddr++, (uint8_t*)dst++, 1);
 102     } while (len < maxlen && start[len++] != 0 );
 103
 104     dst[len] = 0;
 105 }
 106
 107 void
 108 CopyStringIn(ThreadContext *tc, char *src, Addr vaddr)
 109 {
 110     VirtualPort *vp = tc->getVirtPort();
 111     for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
 112             gen.next())
 113     {
 114         vp->writeBlob(gen.addr(), (uint8_t*)src, gen.size());
 115         src += gen.size();
 116     }
 117 }