235 lines
6.2 KiB
C++
235 lines
6.2 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/process.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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: _status(ExecContext::Unallocated),
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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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swCtx(NULL), func_exe_inst(0), storeCondFailures(0)
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{
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memset(®s, 0, sizeof(RegFile));
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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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: _status(ExecContext::Unallocated),
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cpu(_cpu), thread_num(_thread_num), cpu_id(-1),
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process(_process), mem(process->getMemory()), asid(_asid),
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func_exe_inst(0), storeCondFailures(0)
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{
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memset(®s, 0, sizeof(RegFile));
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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_inst(0), storeCondFailures(0)
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{
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memset(®s, 0, sizeof(RegFile));
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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_inst = oldContext->func_exe_inst;
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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::serialize(ostream &os)
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{
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SERIALIZE_ENUM(_status);
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regs.serialize(os);
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// thread_num and cpu_id are deterministic from the config
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SERIALIZE_SCALAR(func_exe_inst);
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#ifdef FULL_SYSTEM
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bool ctx = false;
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if (swCtx) {
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ctx = true;
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SERIALIZE_SCALAR(ctx);
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SERIALIZE_SCALAR(swCtx->calls);
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std::stack<fnCall *> *stack = &(swCtx->callStack);
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fnCall *top;
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int size = stack->size();
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SERIALIZE_SCALAR(size);
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for (int j=0; j<size; ++j) {
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top = stack->top();
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paramOut(os, csprintf("stackpos[%d]",j), top->name);
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delete top;
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stack->pop();
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}
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} else {
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SERIALIZE_SCALAR(ctx);
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}
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if (system->bin) {
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Stats::MainBin *cur = Stats::MainBin::curBin();
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string bin_name = cur->name();
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SERIALIZE_SCALAR(bin_name);
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}
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#endif //FULL_SYSTEM
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}
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void
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ExecContext::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_ENUM(_status);
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regs.unserialize(cp, section);
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// thread_num and cpu_id are deterministic from the config
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UNSERIALIZE_SCALAR(func_exe_inst);
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#ifdef FULL_SYSTEM
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bool ctx;
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UNSERIALIZE_SCALAR(ctx);
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if (ctx) {
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swCtx = new SWContext;
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UNSERIALIZE_SCALAR(swCtx->calls);
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int size;
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UNSERIALIZE_SCALAR(size);
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vector<fnCall *> calls;
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fnCall *call;
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for (int i=0; i<size; ++i) {
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call = new fnCall;
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paramIn(cp, section, csprintf("stackpos[%d]",i), call->name);
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call->myBin = system->getBin(call->name);
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calls.push_back(call);
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}
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for (int i=size-1; i>=0; --i) {
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swCtx->callStack.push(calls[i]);
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}
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}
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if (system->bin) {
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string bin_name;
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UNSERIALIZE_SCALAR(bin_name);
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system->getBin(bin_name)->activate();
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}
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#endif //FULL_SYSTEM
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}
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void
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ExecContext::activate(int delay)
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{
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if (status() == Active)
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return;
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_status = Active;
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cpu->activateContext(thread_num, delay);
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}
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void
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ExecContext::suspend()
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{
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if (status() == Suspended)
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return;
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#ifdef FULL_SYSTEM
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// Don't change the status from active if there are pending interrupts
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if (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 = Suspended;
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cpu->suspendContext(thread_num);
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}
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void
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ExecContext::deallocate()
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{
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if (status() == Unallocated)
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return;
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_status = Unallocated;
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cpu->deallocateContext(thread_num);
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}
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void
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ExecContext::halt()
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{
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if (status() == Halted)
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return;
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_status = Halted;
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cpu->haltContext(thread_num);
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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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