* Authors: Ali Saidi
*/
-#include "arch/sparc/regfile.hh"
+#include "arch/sparc/miscregfile.hh"
+#include "base/bitfield.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/thread_context.hh"
-Fault
-SparcISA::MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
+using namespace SparcISA;
+
+void
+MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
ThreadContext *tc)
{
int64_t time;
- SparcSystem *sys;
+ int oldLevel, newLevel;
switch (miscReg) {
/* Full system only ASRs */
case MISCREG_SOFTINT:
- if (isNonPriv())
- return new PrivilegedOpcode;
// Check if we are going to interrupt because of something
- int oldLevel = InterruptLevel(softint);
- int newLevel = InterruptLevel(val);
+ oldLevel = InterruptLevel(softint);
+ newLevel = InterruptLevel(val);
setReg(miscReg, val);
if (newLevel > oldLevel)
; // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
//tc->getCpuPtr()->checkInterrupts = true;
- return NoFault;
+ panic("SOFTINT not implemented\n");
+ break;
case MISCREG_SOFTINT_CLR:
return setRegWithEffect(miscReg, ~val & softint, tc);
return setRegWithEffect(miscReg, val | softint, tc);
case MISCREG_TICK_CMPR:
- if (isNonPriv())
- return new PrivilegedOpcode;
if (tickCompare == NULL)
tickCompare = new TickCompareEvent(this, tc);
setReg(miscReg, val);
- if (tick_cmprFields.int_dis && tickCompare.scheduled())
- tickCompare.deschedule();
- time = tick_cmprFields.tick_cmpr - tickFields.counter;
- if (!tick_cmprFields.int_dis && time > 0)
- tickCompare.schedule(time * tc->getCpuPtr()->cycles(1));
- return NoFault;
-
- case MISCREG_STICK:
- if (isNonPriv())
- return new PrivilegedOpcode;
- if (isPriv())
- return new PrivilegedAction;
- sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
- assert(sys != NULL);
- sys->sysTick = curTick/Clock::Int::ns - val & ~Bit64;
- stickFields.npt = val & Bit64 ? 1 : 0;
- return NoFault;
+ if ((tick_cmpr & mask(63)) && tickCompare->scheduled())
+ tickCompare->deschedule();
+ time = (tick_cmpr & mask(63)) - (tick & mask(63));
+ if (!(tick_cmpr & ~mask(63)) && time > 0)
+ tickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
+ break;
case MISCREG_STICK_CMPR:
- if (isNonPriv())
- return new PrivilegedOpcode;
if (sTickCompare == NULL)
sTickCompare = new STickCompareEvent(this, tc);
- sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
- assert(sys != NULL);
setReg(miscReg, val);
- if (stick_cmprFields.int_dis && sTickCompare.scheduled())
- sTickCompare.deschedule();
- time = stick_cmprFields.tick_cmpr - sys->sysTick;
- if (!stick_cmprFields.int_dis && time > 0)
- sTickCompare.schedule(time * Clock::Int::ns);
- return NoFault;
-
- /* Fullsystem only Priv registers. */
+ if ((stick_cmpr & mask(63)) && sTickCompare->scheduled())
+ sTickCompare->deschedule();
+ time = (stick_cmpr & mask(63)) - (stick & mask(63));
+ if (!(stick_cmpr & ~mask(63)) && time > 0)
+ sTickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
+ break;
+
case MISCREG_PIL:
- if (FULL_SYSTEM) {
- setReg(miscReg, val);
- //tc->getCpuPtr()->checkInterrupts;
- // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
- return NoFault;
- } else
- panic("PIL not implemented for syscall emulation\n");
-
- /* Hyper privileged registers */
- case MISCREG_HPSTATE:
- case MISCREG_HINTP:
setReg(miscReg, val);
- return NoFault;
- case MISCREG_HTSTATE:
- if (tl == 0)
- return new IllegalInstruction;
- setReg(miscReg, val);
- return NoFault;
+ //tc->getCpuPtr()->checkInterrupts;
+ // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
+ panic("PIL not implemented\n");
+ break;
+
+ case MISCREG_HVER:
+ panic("Shouldn't be writing HVER\n");
case MISCREG_HTBA:
// clear lower 7 bits on writes.
setReg(miscReg, val & ULL(~0x7FFF));
- return NoFault;
+ break;
- case MISCREG_STRAND_STS_REG:
- setReg(miscReg, strandStatusReg);
- return NoFault;
case MISCREG_HSTICK_CMPR:
- if (isNonPriv())
- return new PrivilegedOpcode;
if (hSTickCompare == NULL)
hSTickCompare = new HSTickCompareEvent(this, tc);
- sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
- assert(sys != NULL);
setReg(miscReg, val);
- if (hstick_cmprFields.int_dis && hSTickCompare.scheduled())
- hSTickCompare.deschedule();
- int64_t time = hstick_cmprFields.tick_cmpr - sys->sysTick;
- if (!hstick_cmprFields.int_dis && time > 0)
- hSTickCompare.schedule(time * Clock::Int::ns);
- return NoFault;
+ if ((hstick_cmpr & mask(63)) && hSTickCompare->scheduled())
+ hSTickCompare->deschedule();
+ time = (hstick_cmpr & mask(63)) - (stick & mask(63));
+ if (!(hstick_cmpr & ~mask(63)) && time > 0)
+ hSTickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
+ break;
+
+ case MISCREG_HPSTATE:
+ case MISCREG_HTSTATE:
+ case MISCREG_STRAND_STS_REG:
+ setReg(miscReg, val);
+ break;
+
default:
- return new IllegalInstruction;
+ panic("Invalid write to FS misc register\n");
}
}
MiscReg
-MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext * tc)
+MiscRegFile::readFSRegWithEffect(int miscReg, ThreadContext * tc)
{
switch (miscReg) {
/* Privileged registers. */
case MISCREG_SOFTINT:
- if (isNonPriv()) {
- fault = new PrivilegedOpcode;
- return 0;
- }
- return readReg(miscReg);
case MISCREG_TICK_CMPR:
- if (isNonPriv()) {
- fault = new PrivilegedOpcode;
- return 0;
- }
- return readReg(miscReg);
- case MISCREG_STICK:
- SparcSystem *sys;
- if (stickFields.npt && !isNonPriv()) {
- fault = new PrivilegedAction;
- return 0;
- }
- sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
- assert(sys != NULL);
- return curTick/Clock::Int::ns - sys->sysTick | stickFields.npt << 63;
case MISCREG_STICK_CMPR:
- if (isNonPriv()) {
- fault = new PrivilegedOpcode;
- return 0;
- }
- return readReg(miscReg);
-
-
- /* Hyper privileged registers */
+ case MISCREG_PIL:
case MISCREG_HPSTATE:
case MISCREG_HINTP:
- return readReg(miscReg);
case MISCREG_HTSTATE:
- if (tl == 0) {
- fault = new IllegalInstruction;
- return 0;
- }
- return readReg(miscReg);
+ case MISCREG_STRAND_STS_REG:
+ case MISCREG_HSTICK_CMPR:
+ return readReg(miscReg) ;
case MISCREG_HTBA:
return readReg(miscReg) & ULL(~0x7FFF);
case MISCREG_HVER:
return NWindows | MaxTL << 8 | MaxGL << 16;
- case MISCREG_STRAND_STS_REG:
- return strandStatusReg;
- case MISCREG_HSTICK_CMPR:
- return hstick_cmpr;
default:
- fault = new IllegalInstruction;
- return 0;
+ panic("Invalid read to FS misc register\n");
}
}
+/*
+ In Niagra STICK==TICK so this isn't needed
+ case MISCREG_STICK:
+ SparcSystem *sys;
+ sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
+ assert(sys != NULL);
+ return curTick/Clock::Int::ns - sys->sysTick | (stick & ~(mask(63)));
+*/
+
+
void
MiscRegFile::processTickCompare(ThreadContext *tc)
panic("tick compare not implemented\n");
}
-}; // namespace SparcISA
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