src/sim/tlb.cc

   1 /*
   2  * Copyright (c) 2001-2005 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: Gabe Black
  29  */
  30
  31 #include "cpu/thread_context.hh"
  32 #include "mem/page_table.hh"
  33 #include "sim/process.hh"
  34 #include "sim/faults.hh"
  35 #include "sim/tlb.hh"
  36
  37 Fault
  38 GenericTLB::translateAtomic(RequestPtr req, ThreadContext *tc, Mode)
  39 {
  40 #if FULL_SYSTEM
  41         panic("Generic translation shouldn't be used in full system mode.\n");
  42 #else
  43         Process * p = tc->getProcessPtr();
  44
  45         Fault fault = p->pTable->translate(req);
  46         if(fault != NoFault)
  47             return fault;
  48
  49         return NoFault;
  50 #endif
  51 }
  52
  53 void
  54 GenericTLB::translateTiming(RequestPtr req, ThreadContext *tc,
  55         Translation *translation, Mode mode)
  56 {
  57     assert(translation);
  58     translation->finish(translateAtomic(req, tc, mode), req, tc, mode);
  59 }
  60
  61 void
  62 GenericTLB::demapPage(Addr vaddr, uint64_t asn)
  63 {
  64     warn("Demapping pages in the generic TLB is unnecessary.\n");
  65 }