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#include "base/cprintf.hh"
#include "base/statistics.hh"
#include "base/timebuf.hh"
#include "mem/cache/cache.hh" // for dynamic cast
#include "mem/mem_interface.hh"
#include "sim/builder.hh"
#include "sim/sim_events.hh"
#include "sim/stats.hh"
#include "cpu/beta_cpu/alpha_full_cpu.hh"
#include "cpu/beta_cpu/alpha_params.hh"
#include "cpu/beta_cpu/comm.hh"
#ifdef FULL_SYSTEM
#include "arch/alpha/osfpal.hh"
#include "arch/alpha/isa_traits.hh"
//#include "arch/alpha/ev5.hh"
//using namespace EV5;
#endif
template <class Impl>
AlphaFullCPU<Impl>::AlphaFullCPU(Params ¶ms)
: FullBetaCPU<Impl>(params)
{
DPRINTF(FullCPU, "AlphaFullCPU: Creating AlphaFullCPU object.\n");
this->fetch.setCPU(this);
this->decode.setCPU(this);
this->rename.setCPU(this);
this->iew.setCPU(this);
this->commit.setCPU(this);
this->rob.setCPU(this);
}
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();
}
#ifndef FULL_SYSTEM
// Will probably need to know which thread is calling syscall
// Will need to pass that information in to the DynInst when it is constructed,
// so that this call can be made with the proper thread number.
template <class Impl>
void
AlphaFullCPU<Impl>::syscall(short thread_num)
{
DPRINTF(FullCPU, "AlphaFullCPU: Syscall() called.\n\n");
// Commit stage needs to run as well.
this->commit.tick();
squashStages();
// Temporarily increase this by one to account for the syscall
// instruction.
++(this->funcExeInst);
// Copy over all important state to xc once all the unrolling is done.
copyToXC();
this->thread[0]->syscall();
// this->thread[thread_num]->syscall();
// Copy over all important state back to CPU.
copyFromXC();
// Decrease funcExeInst by one as the normal commit will handle
// incrememnting it.
--(this->funcExeInst);
}
// This is not a pretty function, and should only be used if it is necessary
// to fake having everything squash all at once (ie for non-full system
// syscalls). Maybe put this at the FullCPU level?
template <class Impl>
void
AlphaFullCPU<Impl>::squashStages()
{
InstSeqNum rob_head = this->rob.readHeadSeqNum();
// Now hack the time buffer to put this sequence number in the places
// where the stages might read it.
for (int i = 0; i < 5; ++i)
{
this->timeBuffer.access(-i)->commitInfo.doneSeqNum = rob_head;
}
this->fetch.squash(this->rob.readHeadNextPC());
this->fetchQueue.advance();
this->decode.squash();
this->decodeQueue.advance();
this->rename.squash();
this->renameQueue.advance();
this->renameQueue.advance();
// Be sure to advance the IEW queues so that the commit stage doesn't
// try to set an instruction as completed at the same time that it
// might be deleting it.
this->iew.squash();
this->iewQueue.advance();
this->iewQueue.advance();
// Needs to tell the LSQ to write back all of its data
this->iew.lsqWriteback();
this->rob.squash(rob_head);
this->commit.setSquashing();
// Now hack the time buffer to clear the sequence numbers in the places
// where the stages might read it.?
for (int i = 0; i < 5; ++i)
{
this->timeBuffer.access(-i)->commitInfo.doneSeqNum = 0;
}
}
#endif // FULL_SYSTEM
template <class Impl>
void
AlphaFullCPU<Impl>::copyToXC()
{
PhysRegIndex renamed_reg;
// First loop through the integer registers.
for (int i = 0; i < AlphaISA::NumIntRegs; ++i)
{
renamed_reg = this->renameMap.lookup(i);
this->xc->regs.intRegFile[i] = this->regFile.readIntReg(renamed_reg);
DPRINTF(FullCPU, "FullCPU: Copying register %i, has data %lli.\n",
renamed_reg, this->regFile.intRegFile[renamed_reg]);
}
// Then loop through the floating point registers.
for (int i = 0; i < AlphaISA::NumFloatRegs; ++i)
{
renamed_reg = this->renameMap.lookup(i + AlphaISA::FP_Base_DepTag);
this->xc->regs.floatRegFile.d[i] =
this->regFile.readFloatRegDouble(renamed_reg);
this->xc->regs.floatRegFile.q[i] =
this->regFile.readFloatRegInt(renamed_reg);
}
this->xc->regs.miscRegs.fpcr = this->regFile.miscRegs.fpcr;
this->xc->regs.miscRegs.uniq = this->regFile.miscRegs.uniq;
this->xc->regs.miscRegs.lock_flag = this->regFile.miscRegs.lock_flag;
this->xc->regs.miscRegs.lock_addr = this->regFile.miscRegs.lock_addr;
this->xc->regs.pc = this->rob.readHeadPC();
this->xc->regs.npc = this->xc->regs.pc+4;
this->xc->func_exe_inst = this->funcExeInst;
}
// This function will probably mess things up unless the ROB is empty and
// there are no instructions in the pipeline.
template <class Impl>
void
AlphaFullCPU<Impl>::copyFromXC()
{
PhysRegIndex renamed_reg;
// First loop through the integer registers.
for (int i = 0; i < AlphaISA::NumIntRegs; ++i)
{
renamed_reg = this->renameMap.lookup(i);
DPRINTF(FullCPU, "FullCPU: Copying over register %i, had data %lli, "
"now has data %lli.\n",
renamed_reg, this->regFile.intRegFile[renamed_reg],
this->xc->regs.intRegFile[i]);
this->regFile.setIntReg(renamed_reg, this->xc->regs.intRegFile[i]);
}
// Then loop through the floating point registers.
for (int i = 0; i < AlphaISA::NumFloatRegs; ++i)
{
renamed_reg = this->renameMap.lookup(i + AlphaISA::FP_Base_DepTag);
this->regFile.setFloatRegDouble(renamed_reg,
this->xc->regs.floatRegFile.d[i]);
this->regFile.setFloatRegInt(renamed_reg,
this->xc->regs.floatRegFile.q[i]);
}
// Then loop through the misc registers.
this->regFile.miscRegs.fpcr = this->xc->regs.miscRegs.fpcr;
this->regFile.miscRegs.uniq = this->xc->regs.miscRegs.uniq;
this->regFile.miscRegs.lock_flag = this->xc->regs.miscRegs.lock_flag;
this->regFile.miscRegs.lock_addr = this->xc->regs.miscRegs.lock_addr;
// Then finally set the PC and the next PC.
// regFile.pc = xc->regs.pc;
// regFile.npc = xc->regs.npc;
this->funcExeInst = this->xc->func_exe_inst;
}
#ifdef FULL_SYSTEM
template <class Impl>
uint64_t *
AlphaFullCPU<Impl>::getIpr()
{
return this->regFile.getIpr();
}
template <class Impl>
uint64_t
AlphaFullCPU<Impl>::readIpr(int idx, Fault &fault)
{
return this->regFile.readIpr(idx, fault);
}
template <class Impl>
Fault
AlphaFullCPU<Impl>::setIpr(int idx, uint64_t val)
{
return this->regFile.setIpr(idx, val);
}
template <class Impl>
int
AlphaFullCPU<Impl>::readIntrFlag()
{
return this->regFile.readIntrFlag();
}
template <class Impl>
void
AlphaFullCPU<Impl>::setIntrFlag(int val)
{
this->regFile.setIntrFlag(val);
}
// Can force commit stage to squash and stuff.
template <class Impl>
Fault
AlphaFullCPU<Impl>::hwrei()
{
uint64_t *ipr = getIpr();
if (!inPalMode())
return Unimplemented_Opcode_Fault;
setNextPC(ipr[AlphaISA::IPR_EXC_ADDR]);
// kernelStats.hwrei();
if ((ipr[AlphaISA::IPR_EXC_ADDR] & 1) == 0)
// AlphaISA::swap_palshadow(®s, false);
this->checkInterrupts = true;
// FIXME: XXX check for interrupts? XXX
return No_Fault;
}
template <class Impl>
bool
AlphaFullCPU<Impl>::simPalCheck(int palFunc)
{
// kernelStats.callpal(palFunc);
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;
}
// Probably shouldn't be able to switch to the trap handler as quickly as
// this. Also needs to get the exception restart address from the commit
// stage.
template <class Impl>
void
AlphaFullCPU<Impl>::trap(Fault fault)
{
// Keep in mind that a trap may be initiated by fetch if there's a TLB
// miss
uint64_t PC = this->commit.readCommitPC();
DPRINTF(Fault, "Fault %s\n", FaultName(fault));
this->recordEvent(csprintf("Fault %s", FaultName(fault)));
// kernelStats.fault(fault);
if (fault == Arithmetic_Fault)
panic("Arithmetic traps are unimplemented!");
typename AlphaISA::InternalProcReg *ipr = getIpr();
// exception restart address - Get the commit PC
if (fault != Interrupt_Fault || !inPalMode(PC))
ipr[AlphaISA::IPR_EXC_ADDR] = PC;
if (fault == Pal_Fault || fault == Arithmetic_Fault /* ||
fault == Interrupt_Fault && !PC_PAL(regs.pc) */) {
// traps... skip faulting instruction
ipr[AlphaISA::IPR_EXC_ADDR] += 4;
}
if (!inPalMode(PC))
swapPALShadow(true);
this->regFile.setPC( ipr[AlphaISA::IPR_PAL_BASE] +
AlphaISA::fault_addr[fault] );
this->regFile.setNextPC(PC + sizeof(MachInst));
}
template <class Impl>
void
AlphaFullCPU<Impl>::processInterrupts()
{
// Check for interrupts here. For now can copy the code that exists
// within isa_fullsys_traits.hh.
}
// swap_palshadow swaps in the values of the shadow registers and
// swaps them with the values of the physical registers that map to the
// same logical index.
template <class Impl>
void
AlphaFullCPU<Impl>::swapPALShadow(bool use_shadow)
{
if (palShadowEnabled == use_shadow)
panic("swap_palshadow: wrong PAL shadow state");
palShadowEnabled = use_shadow;
// Will have to lookup in rename map to get physical registers, then
// swap.
/*
for (int i = 0; i < AlphaISA::NumIntRegs; i++) {
if (reg_redir[i]) {
AlphaISA::IntReg temp = regs->intRegFile[i];
regs->intRegFile[i] = regs->palregs[i];
regs->palregs[i] = temp;
}
}
*/
}
#endif // FULL_SYSTEM
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