src/arch/alpha/process.cc

   1 /*
   2  * Copyright (c) 2003-2004 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  */
  31
  32 #include "arch/alpha/isa_traits.hh"
  33 #include "arch/alpha/process.hh"
  34 #include "base/loader/object_file.hh"
  35 #include "base/misc.hh"
  36 #include "cpu/thread_context.hh"
  37 #include "sim/system.hh"
  38
  39 using namespace AlphaISA;
  40 using namespace std;
  41
  42 AlphaLiveProcess::AlphaLiveProcess(LiveProcessParams *params,
  43                                    ObjectFile *objFile)
  44     : LiveProcess(params, objFile)
  45 {
  46     brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
  47     brk_point = roundUp(brk_point, VMPageSize);
  48
  49     // Set up stack.  On Alpha, stack goes below text section.  This
  50     // code should get moved to some architecture-specific spot.
  51     stack_base = objFile->textBase() - (409600+4096);
  52
  53     // Set up region for mmaps.  Tru64 seems to start just above 0 and
  54     // grow up from there.
  55     mmap_start = mmap_end = 0x10000;
  56
  57     // Set pointer for next thread stack.  Reserve 8M for main stack.
  58     next_thread_stack_base = stack_base - (8 * 1024 * 1024);
  59
  60 }
  61
  62 void
  63 AlphaLiveProcess::startup()
  64 {
  65     if (checkpointRestored)
  66         return;
  67
  68     argsInit(MachineBytes, VMPageSize);
  69
  70     threadContexts[0]->setIntReg(GlobalPointerReg, objFile->globalPointer());
  71     //Opperate in user mode
  72     threadContexts[0]->setMiscRegNoEffect(IPR_ICM, 0x18);
  73     //No super page mapping
  74     threadContexts[0]->setMiscRegNoEffect(IPR_MCSR, 0);
  75     //Set this to 0 for now, but it should be unique for each process
  76     threadContexts[0]->setMiscRegNoEffect(IPR_DTB_ASN, M5_pid << 57);
  77 }
  78