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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string>
#include "base_cpu.hh"
#include "exec_context.hh"
#ifdef FULL_SYSTEM
#include "system.hh"
#else
#include "prog.hh"
#endif
using namespace std;
// constructor
#ifdef FULL_SYSTEM
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, System *_sys,
AlphaItb *_itb, AlphaDtb *_dtb,
FunctionalMemory *_mem, int _cpu_id)
: kernelStats(this, _cpu), cpu(_cpu), thread_num(_thread_num), mem(_mem),
itb(_itb), dtb(_dtb), cpu_id(_cpu_id), system(_sys),
memCtrl(_sys->memCtrl), physmem(_sys->physmem)
{
memset(®s, 0, sizeof(RegFile));
_status = Active;
func_exe_insn = 0;
storeCondFailures = 0;
system->registerExecContext(this);
}
#else
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
Process *_process, int _asid)
: cpu(_cpu), thread_num(_thread_num), process(_process), asid (_asid)
{
// Register with process object. Our 'active' will be set by the
// process iff we're the initial context. Others are reserved for
// dynamically created threads.
process->registerExecContext(this);
mem = process->getMemory();
func_exe_insn = 0;
storeCondFailures = 0;
}
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
FunctionalMemory *_mem, int _asid)
: cpu(_cpu), thread_num(_thread_num), process(NULL), mem(_mem),
asid(_asid)
{
}
#endif
void
ExecContext::setStatus(Status new_status)
{
#ifdef FULL_SYSTEM
if (status() == new_status)
return;
// Don't change the status from active if there are pending interrupts
if (new_status == Suspended && cpu->check_interrupts()) {
assert(status() == Active);
return;
}
#endif
_status = new_status;
cpu->execCtxStatusChg();
}
void
ExecContext::regStats(const string &name)
{
#ifdef FULL_SYSTEM
kernelStats.regStats(name + ".kern");
#endif
}
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