* 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.
- *
- * Authors: Ali Saidi
*/
+#include "arch/sparc/kernel_stats.hh"
#include "arch/sparc/miscregfile.hh"
#include "base/bitfield.hh"
#include "base/trace.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
+#include "sim/system.hh"
using namespace SparcISA;
+
void
-MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
- ThreadContext *tc)
+MiscRegFile::checkSoftInt(ThreadContext *tc)
{
+ BaseCPU *cpu = tc->getCpuPtr();
+
+ // If PIL < 14, copy over the tm and sm bits
+ if (pil < 14 && softint & 0x10000)
+ cpu->postInterrupt(IT_SOFT_INT, 16);
+ else
+ cpu->clearInterrupt(IT_SOFT_INT, 16);
+ if (pil < 14 && softint & 0x1)
+ cpu->postInterrupt(IT_SOFT_INT, 0);
+ else
+ cpu->clearInterrupt(IT_SOFT_INT, 0);
+
+ // Copy over any of the other bits that are set
+ for (int bit = 15; bit > 0; --bit) {
+ if (1 << bit & softint && bit > pil)
+ cpu->postInterrupt(IT_SOFT_INT, bit);
+ else
+ cpu->clearInterrupt(IT_SOFT_INT, bit);
+ }
+}
+
+
+void
+MiscRegFile::setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc)
+{
+ BaseCPU *cpu = tc->getCpuPtr();
+
int64_t time;
switch (miscReg) {
/* Full system only ASRs */
case MISCREG_SOFTINT:
- // Check if we are going to interrupt because of something
- setReg(miscReg, val);
- tc->getCpuPtr()->checkInterrupts = true;
- if (val != 0x10000 && val != 0)
- warn("Writing to softint not really supported, writing: %#x\n", val);
+ setRegNoEffect(miscReg, val);;
+ checkSoftInt(tc);
break;
-
case MISCREG_SOFTINT_CLR:
- return setRegWithEffect(MISCREG_SOFTINT, ~val & softint, tc);
+ return setReg(MISCREG_SOFTINT, ~val & softint, tc);
case MISCREG_SOFTINT_SET:
- return setRegWithEffect(MISCREG_SOFTINT, val | softint, tc);
+ return setReg(MISCREG_SOFTINT, val | softint, tc);
case MISCREG_TICK_CMPR:
if (tickCompare == NULL)
tickCompare = new TickCompareEvent(this, tc);
- setReg(miscReg, val);
- if ((tick_cmpr & mask(63)) && tickCompare->scheduled())
- tickCompare->deschedule();
+ setRegNoEffect(miscReg, val);
+ if ((tick_cmpr & ~mask(63)) && tickCompare->scheduled())
+ cpu->deschedule(tickCompare);
time = (tick_cmpr & mask(63)) - (tick & mask(63));
- if (!(tick_cmpr & ~mask(63)) && time > 0)
- tickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
+ if (!(tick_cmpr & ~mask(63)) && time > 0) {
+ if (tickCompare->scheduled())
+ cpu->deschedule(tickCompare);
+ cpu->schedule(tickCompare, curTick + time * cpu->ticks(1));
+ }
panic("writing to TICK compare register %#X\n", val);
break;
case MISCREG_STICK_CMPR:
if (sTickCompare == NULL)
sTickCompare = new STickCompareEvent(this, tc);
- setReg(miscReg, val);
+ setRegNoEffect(miscReg, val);
if ((stick_cmpr & ~mask(63)) && sTickCompare->scheduled())
- sTickCompare->deschedule();
+ cpu->deschedule(sTickCompare);
time = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) -
- tc->getCpuPtr()->instCount();
- if (!(stick_cmpr & ~mask(63)) && time > 0)
- sTickCompare->schedule(time * tc->getCpuPtr()->cycles(1) + curTick);
+ cpu->instCount();
+ if (!(stick_cmpr & ~mask(63)) && time > 0) {
+ if (sTickCompare->scheduled())
+ cpu->deschedule(sTickCompare);
+ cpu->schedule(sTickCompare, curTick + time * cpu->ticks(1));
+ }
DPRINTF(Timer, "writing to sTICK compare register value %#X\n", val);
break;
case MISCREG_PSTATE:
- if (val & ie && !(pstate & ie)) {
- tc->getCpuPtr()->checkInterrupts = true;
- }
- setReg(miscReg, val);
+ setRegNoEffect(miscReg, val);
case MISCREG_PIL:
- if (val < pil) {
- tc->getCpuPtr()->checkInterrupts = true;
- }
- setReg(miscReg, val);
+ setRegNoEffect(miscReg, val);
+ checkSoftInt(tc);
break;
case MISCREG_HVER:
panic("Shouldn't be writing HVER\n");
+ case MISCREG_HINTP:
+ setRegNoEffect(miscReg, val);
+ if (hintp)
+ cpu->postInterrupt(IT_HINTP, 0);
+ else
+ cpu->clearInterrupt(IT_HINTP, 0);
+ break;
+
case MISCREG_HTBA:
// clear lower 7 bits on writes.
- setReg(miscReg, val & ULL(~0x7FFF));
+ setRegNoEffect(miscReg, val & ULL(~0x7FFF));
break;
case MISCREG_QUEUE_CPU_MONDO_HEAD:
case MISCREG_QUEUE_CPU_MONDO_TAIL:
+ setRegNoEffect(miscReg, val);
+ if (cpu_mondo_head != cpu_mondo_tail)
+ cpu->postInterrupt(IT_CPU_MONDO, 0);
+ else
+ cpu->clearInterrupt(IT_CPU_MONDO, 0);
+ break;
case MISCREG_QUEUE_DEV_MONDO_HEAD:
case MISCREG_QUEUE_DEV_MONDO_TAIL:
+ setRegNoEffect(miscReg, val);
+ if (dev_mondo_head != dev_mondo_tail)
+ cpu->postInterrupt(IT_DEV_MONDO, 0);
+ else
+ cpu->clearInterrupt(IT_DEV_MONDO, 0);
+ break;
case MISCREG_QUEUE_RES_ERROR_HEAD:
case MISCREG_QUEUE_RES_ERROR_TAIL:
+ setRegNoEffect(miscReg, val);
+ if (res_error_head != res_error_tail)
+ cpu->postInterrupt(IT_RES_ERROR, 0);
+ else
+ cpu->clearInterrupt(IT_RES_ERROR, 0);
+ break;
case MISCREG_QUEUE_NRES_ERROR_HEAD:
case MISCREG_QUEUE_NRES_ERROR_TAIL:
- setReg(miscReg, val);
- tc->getCpuPtr()->checkInterrupts = true;
+ setRegNoEffect(miscReg, val);
+ // This one doesn't have an interrupt to report to the guest OS
break;
case MISCREG_HSTICK_CMPR:
if (hSTickCompare == NULL)
hSTickCompare = new HSTickCompareEvent(this, tc);
- setReg(miscReg, val);
+ setRegNoEffect(miscReg, val);
if ((hstick_cmpr & ~mask(63)) && hSTickCompare->scheduled())
- hSTickCompare->deschedule();
+ cpu->deschedule(hSTickCompare);
time = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
- tc->getCpuPtr()->instCount();
- if (!(hstick_cmpr & ~mask(63)) && time > 0)
- hSTickCompare->schedule(curTick + time * tc->getCpuPtr()->cycles(1));
+ cpu->instCount();
+ if (!(hstick_cmpr & ~mask(63)) && time > 0) {
+ if (hSTickCompare->scheduled())
+ cpu->deschedule(hSTickCompare);
+ cpu->schedule(hSTickCompare, curTick + time * cpu->ticks(1));
+ }
DPRINTF(Timer, "writing to hsTICK compare register value %#X\n", val);
break;
case MISCREG_HPSTATE:
// T1000 spec says impl. dependent val must always be 1
- setReg(miscReg, val | id);
+ setRegNoEffect(miscReg, val | HPSTATE::id);
+#if FULL_SYSTEM
+ if (hpstate & HPSTATE::tlz && tl == 0 && !(hpstate & HPSTATE::hpriv))
+ cpu->postInterrupt(IT_TRAP_LEVEL_ZERO, 0);
+ else
+ cpu->clearInterrupt(IT_TRAP_LEVEL_ZERO, 0);
+#endif
break;
case MISCREG_HTSTATE:
+ setRegNoEffect(miscReg, val);
+ break;
+
case MISCREG_STRAND_STS_REG:
- setReg(miscReg, val);
+ if (bits(val,2,2))
+ panic("No support for setting spec_en bit\n");
+ setRegNoEffect(miscReg, bits(val,0,0));
+ if (!bits(val,0,0)) {
+ DPRINTF(Quiesce, "Cpu executed quiescing instruction\n");
+ // Time to go to sleep
+ tc->suspend();
+ if (tc->getKernelStats())
+ tc->getKernelStats()->quiesce();
+ }
break;
default:
- panic("Invalid write to FS misc register %s\n", getMiscRegName(miscReg));
+ panic("Invalid write to FS misc register %s\n",
+ getMiscRegName(miscReg));
}
}
MiscReg
-MiscRegFile::readFSRegWithEffect(int miscReg, ThreadContext * tc)
+MiscRegFile::readFSReg(int miscReg, ThreadContext * tc)
{
+ uint64_t temp;
+
switch (miscReg) {
/* Privileged registers. */
case MISCREG_QUEUE_CPU_MONDO_HEAD:
case MISCREG_HPSTATE:
case MISCREG_HINTP:
case MISCREG_HTSTATE:
- case MISCREG_STRAND_STS_REG:
case MISCREG_HSTICK_CMPR:
- return readReg(miscReg) ;
+ return readRegNoEffect(miscReg) ;
case MISCREG_HTBA:
- return readReg(miscReg) & ULL(~0x7FFF);
+ return readRegNoEffect(miscReg) & ULL(~0x7FFF);
case MISCREG_HVER:
- return NWindows | MaxTL << 8 | MaxGL << 16;
+ // XXX set to match Legion
+ return ULL(0x3e) << 48 |
+ ULL(0x23) << 32 |
+ ULL(0x20) << 24 |
+ //MaxGL << 16 | XXX For some reason legion doesn't set GL
+ MaxTL << 8 |
+ (NWindows -1) << 0;
+
+ case MISCREG_STRAND_STS_REG:
+ System *sys;
+ int x;
+ sys = tc->getSystemPtr();
+
+ temp = readRegNoEffect(miscReg) & (STS::active | STS::speculative);
+ // Check that the CPU array is fully populated
+ // (by calling getNumCPus())
+ assert(sys->numContexts() > tc->contextId());
+ temp |= tc->contextId() << STS::shft_id;
+
+ for (x = tc->contextId() & ~3; x < sys->threadContexts.size(); x++) {
+ switch (sys->threadContexts[x]->status()) {
+ case ThreadContext::Active:
+ temp |= STS::st_run << (STS::shft_fsm0 -
+ ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+ break;
+ case ThreadContext::Suspended:
+ // should this be idle?
+ temp |= STS::st_idle << (STS::shft_fsm0 -
+ ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+ break;
+ case ThreadContext::Halted:
+ temp |= STS::st_halt << (STS::shft_fsm0 -
+ ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+ break;
+ default:
+ panic("What state are we in?!\n");
+ } // switch
+ } // for
+
+ return temp;
default:
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)
void
MiscRegFile::processSTickCompare(ThreadContext *tc)
{
+ BaseCPU *cpu = tc->getCpuPtr();
+
// since our microcode instructions take two cycles we need to check if
// we're actually at the correct cycle or we need to wait a little while
// more
int ticks;
ticks = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) -
- tc->getCpuPtr()->instCount();
+ cpu->instCount();
assert(ticks >= 0 && "stick compare missed interrupt cycle");
- if (ticks == 0) {
+ if (ticks == 0 || tc->status() == ThreadContext::Suspended) {
DPRINTF(Timer, "STick compare cycle reached at %#x\n",
(stick_cmpr & mask(63)));
- tc->getCpuPtr()->checkInterrupts = true;
- softint |= ULL(1) << 16;
+ if (!(tc->readMiscRegNoEffect(MISCREG_STICK_CMPR) & (ULL(1) << 63))) {
+ setReg(MISCREG_SOFTINT, softint | (ULL(1) << 16), tc);
+ }
} else
- sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick);
+ cpu->schedule(sTickCompare, curTick + ticks * cpu->ticks(1));
}
void
MiscRegFile::processHSTickCompare(ThreadContext *tc)
{
+ BaseCPU *cpu = tc->getCpuPtr();
+
// since our microcode instructions take two cycles we need to check if
// we're actually at the correct cycle or we need to wait a little while
// more
int ticks;
+ if ( tc->status() == ThreadContext::Halted ||
+ tc->status() == ThreadContext::Unallocated)
+ return;
+
ticks = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
- tc->getCpuPtr()->instCount();
+ cpu->instCount();
assert(ticks >= 0 && "hstick compare missed interrupt cycle");
- if (ticks == 0) {
+ if (ticks == 0 || tc->status() == ThreadContext::Suspended) {
DPRINTF(Timer, "HSTick compare cycle reached at %#x\n",
(stick_cmpr & mask(63)));
- tc->getCpuPtr()->checkInterrupts = true;
+ if (!(tc->readMiscRegNoEffect(MISCREG_HSTICK_CMPR) & (ULL(1) << 63))) {
+ setReg(MISCREG_HINTP, 1, tc);
+ }
// Need to do something to cause interrupt to happen here !!! @todo
} else
- sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick);
+ cpu->schedule(hSTickCompare, curTick + ticks * cpu->ticks(1));
}
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