gem5/cpu/o3/alpha_cpu_impl.hh
Kevin Lim cbfbb7bc56 Updates to bring CPU portion of m5 up-to-date with newmem.
--HG--
extra : convert_revision : 00e6eefb24e6ffd9c7c5d8165db26fbf6199fdc4
2006-08-02 12:05:34 -04:00

782 lines
20 KiB
C++

/*
* Copyright (c) 2004-2006 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 "arch/alpha/faults.hh"
#include "base/cprintf.hh"
#include "base/statistics.hh"
#include "base/timebuf.hh"
#include "cpu/checker/exec_context.hh"
#include "mem/mem_interface.hh"
#include "sim/sim_events.hh"
#include "sim/stats.hh"
#include "cpu/o3/alpha_cpu.hh"
#include "cpu/o3/alpha_params.hh"
#include "cpu/o3/comm.hh"
#include "cpu/o3/thread_state.hh"
#if FULL_SYSTEM
#include "arch/alpha/osfpal.hh"
#include "arch/isa_traits.hh"
#include "cpu/quiesce_event.hh"
#include "kern/kernel_stats.hh"
#endif
using namespace TheISA;
template <class Impl>
AlphaFullCPU<Impl>::AlphaFullCPU(Params *params)
#if FULL_SYSTEM
: FullO3CPU<Impl>(params), itb(params->itb), dtb(params->dtb)
#else
: FullO3CPU<Impl>(params)
#endif
{
DPRINTF(FullCPU, "AlphaFullCPU: Creating AlphaFullCPU object.\n");
// Setup any thread state.
this->thread.resize(this->numThreads);
for (int i = 0; i < this->numThreads; ++i) {
#if FULL_SYSTEM
// SMT is not supported in FS mode yet.
assert(this->numThreads == 1);
this->thread[i] = new Thread(this, 0, params->mem);
this->thread[i]->setStatus(ExecContext::Suspended);
#else
if (i < params->workload.size()) {
DPRINTF(FullCPU, "FullCPU: Workload[%i]'s starting PC is %#x, "
"process is %#x",
i, params->workload[i]->prog_entry, this->thread[i]);
this->thread[i] = new Thread(this, i, params->workload[i], i);
assert(params->workload[i]->getMemory() != NULL);
this->thread[i]->setStatus(ExecContext::Suspended);
//usedTids[i] = true;
//threadMap[i] = i;
} else {
//Allocate Empty execution context so M5 can use later
//when scheduling threads to CPU
Process* dummy_proc = NULL;
this->thread[i] = new Thread(this, i, dummy_proc, i);
//usedTids[i] = false;
}
#endif // !FULL_SYSTEM
ExecContext *xc_proxy;
// Setup the XC that will serve as the interface to the threads/CPU.
AlphaXC *alpha_xc = new AlphaXC;
// If we're using a checker, then the XC should be the
// CheckerExecContext.
if (params->checker) {
xc_proxy = new CheckerExecContext<AlphaXC>(
alpha_xc, this->checker);
} else {
xc_proxy = alpha_xc;
}
alpha_xc->cpu = this;
alpha_xc->thread = this->thread[i];
#if FULL_SYSTEM
// Setup quiesce event.
this->thread[i]->quiesceEvent =
new EndQuiesceEvent(xc_proxy);
this->thread[i]->lastActivate = 0;
this->thread[i]->lastSuspend = 0;
#endif
// Give the thread the XC.
this->thread[i]->xcProxy = xc_proxy;
// Add the XC to the CPU's list of XC's.
this->execContexts.push_back(xc_proxy);
}
for (int i=0; i < this->numThreads; i++) {
this->thread[i]->funcExeInst = 0;
}
// Sets CPU pointers. These must be set at this level because the CPU
// pointers are defined to be the highest level of CPU class.
this->fetch.setCPU(this);
this->decode.setCPU(this);
this->rename.setCPU(this);
this->iew.setCPU(this);
this->commit.setCPU(this);
this->rob.setCPU(this);
this->regFile.setCPU(this);
lockAddr = 0;
lockFlag = false;
}
template <class Impl>
void
AlphaFullCPU<Impl>::regStats()
{
// Register stats for everything that has stats.
this->fullCPURegStats();
this->fetch.regStats();
this->decode.regStats();
this->rename.regStats();
this->iew.regStats();
this->commit.regStats();
}
#if FULL_SYSTEM
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::dumpFuncProfile()
{
// Currently not supported
}
#endif
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::takeOverFrom(ExecContext *old_context)
{
// some things should already be set up
assert(getMemPtr() == old_context->getMemPtr());
#if FULL_SYSTEM
assert(getSystemPtr() == old_context->getSystemPtr());
#else
assert(getProcessPtr() == old_context->getProcessPtr());
#endif
// copy over functional state
setStatus(old_context->status());
copyArchRegs(old_context);
setCpuId(old_context->readCpuId());
#if !FULL_SYSTEM
thread->funcExeInst = old_context->readFuncExeInst();
#else
EndQuiesceEvent *other_quiesce = old_context->getQuiesceEvent();
if (other_quiesce) {
// Point the quiesce event's XC at this XC so that it wakes up
// the proper CPU.
other_quiesce->xc = this;
}
if (thread->quiesceEvent) {
thread->quiesceEvent->xc = this;
}
// Transfer kernel stats from one CPU to the other.
thread->kernelStats = old_context->getKernelStats();
// storeCondFailures = 0;
cpu->lockFlag = false;
#endif
old_context->setStatus(ExecContext::Unallocated);
thread->inSyscall = false;
thread->trapPending = false;
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::activate(int delay)
{
DPRINTF(FullCPU, "Calling activate on AlphaXC\n");
if (thread->status() == ExecContext::Active)
return;
#if FULL_SYSTEM
thread->lastActivate = curTick;
#endif
if (thread->status() == ExecContext::Unallocated) {
cpu->activateWhenReady(thread->tid);
return;
}
thread->setStatus(ExecContext::Active);
// status() == Suspended
cpu->activateContext(thread->tid, delay);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::suspend()
{
DPRINTF(FullCPU, "Calling suspend on AlphaXC\n");
if (thread->status() == ExecContext::Suspended)
return;
#if FULL_SYSTEM
thread->lastActivate = curTick;
thread->lastSuspend = curTick;
#endif
/*
#if FULL_SYSTEM
// Don't change the status from active if there are pending interrupts
if (cpu->check_interrupts()) {
assert(status() == ExecContext::Active);
return;
}
#endif
*/
thread->setStatus(ExecContext::Suspended);
cpu->suspendContext(thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::deallocate()
{
DPRINTF(FullCPU, "Calling deallocate on AlphaXC\n");
if (thread->status() == ExecContext::Unallocated)
return;
thread->setStatus(ExecContext::Unallocated);
cpu->deallocateContext(thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::halt()
{
DPRINTF(FullCPU, "Calling halt on AlphaXC\n");
if (thread->status() == ExecContext::Halted)
return;
thread->setStatus(ExecContext::Halted);
cpu->haltContext(thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::regStats(const std::string &name)
{
#if FULL_SYSTEM
thread->kernelStats = new Kernel::Statistics(cpu->system);
thread->kernelStats->regStats(name + ".kern");
#endif
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::serialize(std::ostream &os)
{
#if FULL_SYSTEM
if (thread->kernelStats)
thread->kernelStats->serialize(os);
#endif
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::unserialize(Checkpoint *cp, const std::string &section)
{
#if FULL_SYSTEM
if (thread->kernelStats)
thread->kernelStats->unserialize(cp, section);
#endif
}
#if FULL_SYSTEM
template <class Impl>
EndQuiesceEvent *
AlphaFullCPU<Impl>::AlphaXC::getQuiesceEvent()
{
return thread->quiesceEvent;
}
template <class Impl>
Tick
AlphaFullCPU<Impl>::AlphaXC::readLastActivate()
{
return thread->lastActivate;
}
template <class Impl>
Tick
AlphaFullCPU<Impl>::AlphaXC::readLastSuspend()
{
return thread->lastSuspend;
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::profileClear()
{}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::profileSample()
{}
#endif
template <class Impl>
TheISA::MachInst
AlphaFullCPU<Impl>::AlphaXC:: getInst()
{
return thread->inst;
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::copyArchRegs(ExecContext *xc)
{
// This function will mess things up unless the ROB is empty and
// there are no instructions in the pipeline.
unsigned tid = thread->tid;
PhysRegIndex renamed_reg;
// First loop through the integer registers.
for (int i = 0; i < AlphaISA::NumIntRegs; ++i) {
renamed_reg = cpu->renameMap[tid].lookup(i);
DPRINTF(FullCPU, "FullCPU: Copying over register %i, had data %lli, "
"now has data %lli.\n",
renamed_reg, cpu->readIntReg(renamed_reg),
xc->readIntReg(i));
cpu->setIntReg(renamed_reg, xc->readIntReg(i));
}
// Then loop through the floating point registers.
for (int i = 0; i < AlphaISA::NumFloatRegs; ++i) {
renamed_reg = cpu->renameMap[tid].lookup(i + AlphaISA::FP_Base_DepTag);
cpu->setFloatRegDouble(renamed_reg,
xc->readFloatRegDouble(i));
cpu->setFloatRegInt(renamed_reg,
xc->readFloatRegInt(i));
}
// Copy the misc regs.
TheISA::copyMiscRegs(xc, this);
// Then finally set the PC and the next PC.
cpu->setPC(xc->readPC(), tid);
cpu->setNextPC(xc->readNextPC(), tid);
#if !FULL_SYSTEM
this->thread->funcExeInst = xc->readFuncExeInst();
#endif
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::clearArchRegs()
{}
template <class Impl>
uint64_t
AlphaFullCPU<Impl>::AlphaXC::readIntReg(int reg_idx)
{
return cpu->readArchIntReg(reg_idx, thread->tid);
}
template <class Impl>
float
AlphaFullCPU<Impl>::AlphaXC::readFloatRegSingle(int reg_idx)
{
return cpu->readArchFloatRegSingle(reg_idx, thread->tid);
}
template <class Impl>
double
AlphaFullCPU<Impl>::AlphaXC::readFloatRegDouble(int reg_idx)
{
return cpu->readArchFloatRegDouble(reg_idx, thread->tid);
}
template <class Impl>
uint64_t
AlphaFullCPU<Impl>::AlphaXC::readFloatRegInt(int reg_idx)
{
return cpu->readArchFloatRegInt(reg_idx, thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setIntReg(int reg_idx, uint64_t val)
{
cpu->setArchIntReg(reg_idx, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setFloatRegSingle(int reg_idx, float val)
{
cpu->setArchFloatRegSingle(reg_idx, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setFloatRegDouble(int reg_idx, double val)
{
cpu->setArchFloatRegDouble(reg_idx, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setFloatRegInt(int reg_idx, uint64_t val)
{
cpu->setArchFloatRegInt(reg_idx, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setPC(uint64_t val)
{
cpu->setPC(val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setNextPC(uint64_t val)
{
cpu->setNextPC(val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::AlphaXC::setMiscReg(int misc_reg, const MiscReg &val)
{
Fault ret_fault = cpu->setMiscReg(misc_reg, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
return ret_fault;
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::AlphaXC::setMiscRegWithEffect(int misc_reg,
const MiscReg &val)
{
Fault ret_fault = cpu->setMiscRegWithEffect(misc_reg, val, thread->tid);
// Squash if we're not already in a state update mode.
if (!thread->trapPending && !thread->inSyscall) {
cpu->squashFromXC(thread->tid);
}
return ret_fault;
}
#if !FULL_SYSTEM
template <class Impl>
TheISA::IntReg
AlphaFullCPU<Impl>::AlphaXC::getSyscallArg(int i)
{
return cpu->getSyscallArg(i, thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setSyscallArg(int i, IntReg val)
{
cpu->setSyscallArg(i, val, thread->tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::AlphaXC::setSyscallReturn(SyscallReturn return_value)
{
cpu->setSyscallReturn(return_value, thread->tid);
}
#endif // FULL_SYSTEM
template <class Impl>
MiscReg
AlphaFullCPU<Impl>::readMiscReg(int misc_reg, unsigned tid)
{
return this->regFile.readMiscReg(misc_reg, tid);
}
template <class Impl>
MiscReg
AlphaFullCPU<Impl>::readMiscRegWithEffect(int misc_reg, Fault &fault,
unsigned tid)
{
return this->regFile.readMiscRegWithEffect(misc_reg, fault, tid);
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::setMiscReg(int misc_reg, const MiscReg &val, unsigned tid)
{
return this->regFile.setMiscReg(misc_reg, val, tid);
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::setMiscRegWithEffect(int misc_reg, const MiscReg &val,
unsigned tid)
{
return this->regFile.setMiscRegWithEffect(misc_reg, val, tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::squashFromXC(unsigned tid)
{
this->thread[tid]->inSyscall = true;
this->commit.generateXCEvent(tid);
}
#if FULL_SYSTEM
template <class Impl>
void
AlphaFullCPU<Impl>::post_interrupt(int int_num, int index)
{
BaseCPU::post_interrupt(int_num, index);
if (this->thread[0]->status() == ExecContext::Suspended) {
DPRINTF(IPI,"Suspended Processor awoke\n");
this->execContexts[0]->activate();
}
}
template <class Impl>
int
AlphaFullCPU<Impl>::readIntrFlag()
{
return this->regFile.readIntrFlag();
}
template <class Impl>
void
AlphaFullCPU<Impl>::setIntrFlag(int val)
{
this->regFile.setIntrFlag(val);
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::hwrei(unsigned tid)
{
// Need to clear the lock flag upon returning from an interrupt.
this->lockFlag = false;
this->thread[tid]->kernelStats->hwrei();
this->checkInterrupts = true;
// FIXME: XXX check for interrupts? XXX
return NoFault;
}
template <class Impl>
bool
AlphaFullCPU<Impl>::simPalCheck(int palFunc, unsigned tid)
{
if (this->thread[tid]->kernelStats)
this->thread[tid]->kernelStats->callpal(palFunc,
this->execContexts[tid]);
switch (palFunc) {
case PAL::halt:
halt();
if (--System::numSystemsRunning == 0)
new SimExitEvent("all cpus halted");
break;
case PAL::bpt:
case PAL::bugchk:
if (this->system->breakpoint())
return false;
break;
}
return true;
}
template <class Impl>
void
AlphaFullCPU<Impl>::trap(Fault fault, unsigned tid)
{
// Pass the thread's XC into the invoke method.
fault->invoke(this->execContexts[tid]);
}
template <class Impl>
void
AlphaFullCPU<Impl>::processInterrupts()
{
// Check for interrupts here. For now can copy the code that
// exists within isa_fullsys_traits.hh. Also assume that thread 0
// is the one that handles the interrupts.
// @todo: Possibly consolidate the interrupt checking code.
// @todo: Allow other threads to handle interrupts.
// Check if there are any outstanding interrupts
//Handle the interrupts
int ipl = 0;
int summary = 0;
this->checkInterrupts = false;
if (this->readMiscReg(IPR_ASTRR, 0))
panic("asynchronous traps not implemented\n");
if (this->readMiscReg(IPR_SIRR, 0)) {
for (int i = INTLEVEL_SOFTWARE_MIN;
i < INTLEVEL_SOFTWARE_MAX; i++) {
if (this->readMiscReg(IPR_SIRR, 0) & (ULL(1) << i)) {
// See table 4-19 of the 21164 hardware reference
ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1;
summary |= (ULL(1) << i);
}
}
}
uint64_t interrupts = this->intr_status();
if (interrupts) {
for (int i = INTLEVEL_EXTERNAL_MIN;
i < INTLEVEL_EXTERNAL_MAX; i++) {
if (interrupts & (ULL(1) << i)) {
// See table 4-19 of the 21164 hardware reference
ipl = i;
summary |= (ULL(1) << i);
}
}
}
if (ipl && ipl > this->readMiscReg(IPR_IPLR, 0)) {
this->setMiscReg(IPR_ISR, summary, 0);
this->setMiscReg(IPR_INTID, ipl, 0);
// Checker needs to know these two registers were updated.
if (this->checker) {
this->checker->cpuXCBase()->setMiscReg(IPR_ISR, summary);
this->checker->cpuXCBase()->setMiscReg(IPR_INTID, ipl);
}
this->trap(Fault(new InterruptFault), 0);
DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
this->readMiscReg(IPR_IPLR, 0), ipl, summary);
}
}
#endif // FULL_SYSTEM
#if !FULL_SYSTEM
template <class Impl>
void
AlphaFullCPU<Impl>::syscall(int tid)
{
DPRINTF(FullCPU, "AlphaFullCPU: [tid:%i] Executing syscall().\n\n", tid);
DPRINTF(Activity,"Activity: syscall() called.\n");
// Temporarily increase this by one to account for the syscall
// instruction.
++(this->thread[tid]->funcExeInst);
// Execute the actual syscall.
this->thread[tid]->syscall();
// Decrease funcExeInst by one as the normal commit will handle
// incrementing it.
--(this->thread[tid]->funcExeInst);
}
template <class Impl>
TheISA::IntReg
AlphaFullCPU<Impl>::getSyscallArg(int i, int tid)
{
return this->readArchIntReg(AlphaISA::ArgumentReg0 + i, tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::setSyscallArg(int i, IntReg val, int tid)
{
this->setArchIntReg(AlphaISA::ArgumentReg0 + i, val, tid);
}
template <class Impl>
void
AlphaFullCPU<Impl>::setSyscallReturn(SyscallReturn return_value, int tid)
{
// check for error condition. Alpha syscall convention is to
// indicate success/failure in reg a3 (r19) and put the
// return value itself in the standard return value reg (v0).
if (return_value.successful()) {
// no error
this->setArchIntReg(SyscallSuccessReg, 0, tid);
this->setArchIntReg(ReturnValueReg, return_value.value(), tid);
} else {
// got an error, return details
this->setArchIntReg(SyscallSuccessReg, (IntReg) -1, tid);
this->setArchIntReg(ReturnValueReg, -return_value.value(), tid);
}
}
#endif