src/arch/mips/process.cc

   1 /*
   2  * Copyright (c) 2004-2005 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  *          Ali Saidi
  30  *          Korey Sewell
  31  */
  32
  33 #include "arch/mips/isa_traits.hh"
  34 #include "arch/mips/process.hh"
  35 #include "base/loader/object_file.hh"
  36 #include "base/misc.hh"
  37 #include "cpu/thread_context.hh"
  38 #include "sim/system.hh"
  39
  40 using namespace std;
  41 using namespace MipsISA;
  42
  43 MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params,
  44         ObjectFile *objFile)
  45     : LiveProcess(params, objFile)
  46 {
  47     // Set up stack. On MIPS, stack starts at the top of kuseg
  48     // user address space. MIPS stack grows down from here
  49     stack_base = 0x7FFFFFFF;
  50
  51     // Set pointer for next thread stack.  Reserve 8M for main stack.
  52     next_thread_stack_base = stack_base - (8 * 1024 * 1024);
  53
  54     // Set up break point (Top of Heap)
  55     brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
  56     brk_point = roundUp(brk_point, VMPageSize);
  57
  58     // Set up region for mmaps. For now, start at bottom of kuseg space.
  59     mmap_start = mmap_end = 0x10000;
  60 }
  61
  62 void
  63 MipsLiveProcess::startup()
  64 {
  65     argsInit(MachineBytes, VMPageSize);
  66 }