process.cc revision 5713:993c7952b930 
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
39using namespace AlphaISA;
40using namespace std;
41
42AlphaLiveProcess::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
62void
63AlphaLiveProcess::startup()
64{
65    if (checkpointRestored)
66        return;
67
68    argsInit(MachineBytes, VMPageSize);
69
70    ThreadContext *tc = system->getThreadContext(contextIds[0]);
71    tc->setIntReg(GlobalPointerReg, objFile->globalPointer());
72    //Operate in user mode
73    tc->setMiscRegNoEffect(IPR_ICM, 0x18);
74    //No super page mapping
75    tc->setMiscRegNoEffect(IPR_MCSR, 0);
76    //Set this to 0 for now, but it should be unique for each process
77    tc->setMiscRegNoEffect(IPR_DTB_ASN, M5_pid << 57);
78}
79
80