f5da73b688
of CPUs that get switched round-robin (though currently we're only shooting for
two CPUs and one switch event, and even that doesn't quite work yet). Registration
of ExecContexts with System/Process object factored out so we can create two CPUs
but only register one of them at a time. Also worked at making behavior and naming
in System and Process objects more consistent.
arch/alpha/ev5.cc:
Rename ipr_init to initIPRs and get rid of unused mem arg.
arch/alpha/fake_syscall.cc:
Process:numCpus is now a function (not a data member).
base/remote_gdb.hh:
Support for ExecContext switching.
cpu/base_cpu.cc:
cpu/base_cpu.hh:
cpu/exec_context.cc:
cpu/exec_context.hh:
cpu/simple_cpu/simple_cpu.hh:
Support for ExecContext switching.
Renamed contexts array to execContexts to be consistent with Process.
CPU ID now auto-assigned by system object.
cpu/simple_cpu/simple_cpu.cc:
Support for ExecContext switching.
Renamed contexts array to execContexts to be consistent with Process.
CPU ID now auto-assigned by system object.
Cleaned up MP full-system initialization a bit.
dev/alpha_console.cc:
Renamed xcvec array to execContexts to be consistent with Process.
kern/tru64/tru64_system.cc:
kern/tru64/tru64_system.hh:
Support for ExecContext switching.
CPU ID now auto-assigned by system object.
sim/prog.cc:
sim/prog.hh:
Support for ExecContext switching.
Process:numCpus is now a function (not a data member).
sim/system.cc:
sim/system.hh:
Support for ExecContext switching.
Renamed xcvec array to execContexts to be consistent with Process.
--HG--
extra : convert_revision : 79649cffad5bf3e83de8df44236941907926d791
126 lines
3.9 KiB
C++
126 lines
3.9 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string>
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#include "cpu/base_cpu.hh"
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#include "cpu/exec_context.hh"
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#ifdef FULL_SYSTEM
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#include "sim/system.hh"
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#else
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#include "sim/prog.hh"
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#endif
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using namespace std;
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// constructor
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#ifdef FULL_SYSTEM
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ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, System *_sys,
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AlphaItb *_itb, AlphaDtb *_dtb,
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FunctionalMemory *_mem)
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: kernelStats(this, _cpu), cpu(_cpu), thread_num(_thread_num),
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cpu_id(-1), mem(_mem), itb(_itb), dtb(_dtb), system(_sys),
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memCtrl(_sys->memCtrl), physmem(_sys->physmem),
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func_exe_insn(0), storeCondFailures(0)
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{
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memset(®s, 0, sizeof(RegFile));
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setStatus(ExecContext::Unallocated);
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}
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#else
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ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
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Process *_process, int _asid)
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: cpu(_cpu), thread_num(_thread_num), cpu_id(-1),
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process(_process), asid (_asid),
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func_exe_insn(0), storeCondFailures(0)
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{
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setStatus(ExecContext::Unallocated);
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mem = process->getMemory();
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}
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ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
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FunctionalMemory *_mem, int _asid)
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: cpu(_cpu), thread_num(_thread_num), process(0), mem(_mem), asid(_asid),
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func_exe_insn(0), storeCondFailures(0)
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{
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}
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#endif
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void
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ExecContext::takeOverFrom(ExecContext *oldContext)
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{
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// some things should already be set up
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assert(mem == oldContext->mem);
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#ifdef FULL_SYSTEM
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assert(system == oldContext->system);
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#else
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assert(process == oldContext->process);
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#endif
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// copy over functional state
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_status = oldContext->_status;
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#ifdef FULL_SYSTEM
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kernelStats = oldContext->kernelStats;
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#endif
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regs = oldContext->regs;
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cpu_id = oldContext->cpu_id;
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func_exe_insn = oldContext->func_exe_insn;
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storeCondFailures = 0;
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oldContext->_status = ExecContext::Unallocated;
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}
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void
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ExecContext::setStatus(Status new_status)
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{
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#ifdef FULL_SYSTEM
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if (status() == new_status)
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return;
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// Don't change the status from active if there are pending interrupts
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if (new_status == Suspended && cpu->check_interrupts()) {
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assert(status() == Active);
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return;
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}
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#endif
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_status = new_status;
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cpu->execCtxStatusChg();
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}
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void
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ExecContext::regStats(const string &name)
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{
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#ifdef FULL_SYSTEM
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kernelStats.regStats(name + ".kern");
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#endif
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}
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