* Kevin Lim
*/
+#include "arch/sparc/faults.hh"
+
#include <algorithm>
-#include "arch/sparc/faults.hh"
#include "arch/sparc/isa_traits.hh"
#include "arch/sparc/process.hh"
+#include "arch/sparc/tlb.hh"
#include "arch/sparc/types.hh"
#include "base/bitfield.hh"
#include "base/trace.hh"
-#include "sim/full_system.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "mem/page_table.hh"
-#include "sim/process.hh"
#include "sim/full_system.hh"
+#include "sim/process.hh"
using namespace std;
{
template<> SparcFaultBase::FaultVals
- SparcFault<PowerOnReset>::vals =
-{"power_on_reset", 0x001, 0, {H, H, H}, FaultStat()};
+ SparcFault<PowerOnReset>::vals
+("power_on_reset", 0x001, 0, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<WatchDogReset>::vals =
-{"watch_dog_reset", 0x002, 120, {H, H, H}, FaultStat()};
+ SparcFault<WatchDogReset>::vals
+("watch_dog_reset", 0x002, 120, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<ExternallyInitiatedReset>::vals =
-{"externally_initiated_reset", 0x003, 110, {H, H, H}, FaultStat()};
+ SparcFault<ExternallyInitiatedReset>::vals
+("externally_initiated_reset", 0x003, 110, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<SoftwareInitiatedReset>::vals =
-{"software_initiated_reset", 0x004, 130, {SH, SH, H}, FaultStat()};
+ SparcFault<SoftwareInitiatedReset>::vals
+("software_initiated_reset", 0x004, 130, {{SH, SH, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<REDStateException>::vals =
-{"RED_state_exception", 0x005, 1, {H, H, H}, FaultStat()};
+ SparcFault<REDStateException>::vals
+("RED_state_exception", 0x005, 1, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<StoreError>::vals =
-{"store_error", 0x007, 201, {H, H, H}, FaultStat()};
+ SparcFault<StoreError>::vals
+("store_error", 0x007, 201, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<InstructionAccessException>::vals =
-{"instruction_access_exception", 0x008, 300, {H, H, H}, FaultStat()};
+ SparcFault<InstructionAccessException>::vals
+("instruction_access_exception", 0x008, 300, {{H, H, H}});
//XXX This trap is apparently dropped from ua2005
/*template<> SparcFaultBase::FaultVals
- SparcFault<InstructionAccessMMUMiss>::vals =
- {"inst_mmu", 0x009, 2, {H, H, H}};*/
+ SparcFault<InstructionAccessMMUMiss>::vals
+ ("inst_mmu", 0x009, 2, {{H, H, H}});*/
template<> SparcFaultBase::FaultVals
- SparcFault<InstructionAccessError>::vals =
-{"instruction_access_error", 0x00A, 400, {H, H, H}, FaultStat()};
+ SparcFault<InstructionAccessError>::vals
+("instruction_access_error", 0x00A, 400, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<IllegalInstruction>::vals =
-{"illegal_instruction", 0x010, 620, {H, H, H}, FaultStat()};
+ SparcFault<IllegalInstruction>::vals
+("illegal_instruction", 0x010, 620, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<PrivilegedOpcode>::vals =
-{"privileged_opcode", 0x011, 700, {P, SH, SH}, FaultStat()};
+ SparcFault<PrivilegedOpcode>::vals
+("privileged_opcode", 0x011, 700, {{P, SH, SH}});
//XXX This trap is apparently dropped from ua2005
/*template<> SparcFaultBase::FaultVals
- SparcFault<UnimplementedLDD>::vals =
- {"unimp_ldd", 0x012, 6, {H, H, H}};*/
+ SparcFault<UnimplementedLDD>::vals
+ ("unimp_ldd", 0x012, 6, {{H, H, H}});*/
//XXX This trap is apparently dropped from ua2005
/*template<> SparcFaultBase::FaultVals
- SparcFault<UnimplementedSTD>::vals =
- {"unimp_std", 0x013, 6, {H, H, H}};*/
+ SparcFault<UnimplementedSTD>::vals
+ ("unimp_std", 0x013, 6, {{H, H, H}});*/
template<> SparcFaultBase::FaultVals
- SparcFault<FpDisabled>::vals =
-{"fp_disabled", 0x020, 800, {P, P, H}, FaultStat()};
+ SparcFault<FpDisabled>::vals
+("fp_disabled", 0x020, 800, {{P, P, H}});
+/* SPARCv8 and SPARCv9 define just fp_disabled trap. SIMD is not contemplated
+ * as a separate part. Therefore, we use the same code and TT */
template<> SparcFaultBase::FaultVals
- SparcFault<FpExceptionIEEE754>::vals =
-{"fp_exception_ieee_754", 0x021, 1110, {P, P, H}, FaultStat()};
+ SparcFault<VecDisabled>::vals
+("fp_disabled", 0x020, 800, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<FpExceptionOther>::vals =
-{"fp_exception_other", 0x022, 1110, {P, P, H}, FaultStat()};
+ SparcFault<FpExceptionIEEE754>::vals
+("fp_exception_ieee_754", 0x021, 1110, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<TagOverflow>::vals =
-{"tag_overflow", 0x023, 1400, {P, P, H}, FaultStat()};
+ SparcFault<FpExceptionOther>::vals
+("fp_exception_other", 0x022, 1110, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<CleanWindow>::vals =
-{"clean_window", 0x024, 1010, {P, P, H}, FaultStat()};
+ SparcFault<TagOverflow>::vals
+("tag_overflow", 0x023, 1400, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<DivisionByZero>::vals =
-{"division_by_zero", 0x028, 1500, {P, P, H}, FaultStat()};
+ SparcFault<CleanWindow>::vals
+("clean_window", 0x024, 1010, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<InternalProcessorError>::vals =
-{"internal_processor_error", 0x029, 4, {H, H, H}, FaultStat()};
+ SparcFault<DivisionByZero>::vals
+("division_by_zero", 0x028, 1500, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<InstructionInvalidTSBEntry>::vals =
-{"instruction_invalid_tsb_entry", 0x02A, 210, {H, H, SH}, FaultStat()};
+ SparcFault<InternalProcessorError>::vals
+("internal_processor_error", 0x029, 4, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<DataInvalidTSBEntry>::vals =
-{"data_invalid_tsb_entry", 0x02B, 1203, {H, H, H}, FaultStat()};
+ SparcFault<InstructionInvalidTSBEntry>::vals
+("instruction_invalid_tsb_entry", 0x02A, 210, {{H, H, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<DataAccessException>::vals =
-{"data_access_exception", 0x030, 1201, {H, H, H}, FaultStat()};
+ SparcFault<DataInvalidTSBEntry>::vals
+("data_invalid_tsb_entry", 0x02B, 1203, {{H, H, H}});
+
+template<> SparcFaultBase::FaultVals
+ SparcFault<DataAccessException>::vals
+("data_access_exception", 0x030, 1201, {{H, H, H}});
//XXX This trap is apparently dropped from ua2005
/*template<> SparcFaultBase::FaultVals
- SparcFault<DataAccessMMUMiss>::vals =
- {"data_mmu", 0x031, 12, {H, H, H}};*/
+ SparcFault<DataAccessMMUMiss>::vals
+ ("data_mmu", 0x031, 12, {{H, H, H}});*/
template<> SparcFaultBase::FaultVals
- SparcFault<DataAccessError>::vals =
-{"data_access_error", 0x032, 1210, {H, H, H}, FaultStat()};
+ SparcFault<DataAccessError>::vals
+("data_access_error", 0x032, 1210, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<DataAccessProtection>::vals =
-{"data_access_protection", 0x033, 1207, {H, H, H}, FaultStat()};
+ SparcFault<DataAccessProtection>::vals
+("data_access_protection", 0x033, 1207, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<MemAddressNotAligned>::vals =
-{"mem_address_not_aligned", 0x034, 1020, {H, H, H}, FaultStat()};
+ SparcFault<MemAddressNotAligned>::vals
+("mem_address_not_aligned", 0x034, 1020, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<LDDFMemAddressNotAligned>::vals =
-{"LDDF_mem_address_not_aligned", 0x035, 1010, {H, H, H}, FaultStat()};
+ SparcFault<LDDFMemAddressNotAligned>::vals
+("LDDF_mem_address_not_aligned", 0x035, 1010, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<STDFMemAddressNotAligned>::vals =
-{"STDF_mem_address_not_aligned", 0x036, 1010, {H, H, H}, FaultStat()};
+ SparcFault<STDFMemAddressNotAligned>::vals
+("STDF_mem_address_not_aligned", 0x036, 1010, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<PrivilegedAction>::vals =
-{"privileged_action", 0x037, 1110, {H, H, SH}, FaultStat()};
+ SparcFault<PrivilegedAction>::vals
+("privileged_action", 0x037, 1110, {{H, H, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<LDQFMemAddressNotAligned>::vals =
-{"LDQF_mem_address_not_aligned", 0x038, 1010, {H, H, H}, FaultStat()};
+ SparcFault<LDQFMemAddressNotAligned>::vals
+("LDQF_mem_address_not_aligned", 0x038, 1010, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<STQFMemAddressNotAligned>::vals =
-{"STQF_mem_address_not_aligned", 0x039, 1010, {H, H, H}, FaultStat()};
+ SparcFault<STQFMemAddressNotAligned>::vals
+("STQF_mem_address_not_aligned", 0x039, 1010, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<InstructionRealTranslationMiss>::vals =
-{"instruction_real_translation_miss", 0x03E, 208, {H, H, SH}, FaultStat()};
+ SparcFault<InstructionRealTranslationMiss>::vals
+("instruction_real_translation_miss", 0x03E, 208, {{H, H, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<DataRealTranslationMiss>::vals =
-{"data_real_translation_miss", 0x03F, 1203, {H, H, H}, FaultStat()};
+ SparcFault<DataRealTranslationMiss>::vals
+("data_real_translation_miss", 0x03F, 1203, {{H, H, H}});
//XXX This trap is apparently dropped from ua2005
/*template<> SparcFaultBase::FaultVals
- SparcFault<AsyncDataError>::vals =
- {"async_data", 0x040, 2, {H, H, H}};*/
+ SparcFault<AsyncDataError>::vals
+ ("async_data", 0x040, 2, {{H, H, H}});*/
template<> SparcFaultBase::FaultVals
- SparcFault<InterruptLevelN>::vals =
-{"interrupt_level_n", 0x040, 0, {P, P, SH}, FaultStat()};
+ SparcFault<InterruptLevelN>::vals
+("interrupt_level_n", 0x040, 0, {{P, P, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<HstickMatch>::vals =
-{"hstick_match", 0x05E, 1601, {H, H, H}, FaultStat()};
+ SparcFault<HstickMatch>::vals
+("hstick_match", 0x05E, 1601, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<TrapLevelZero>::vals =
-{"trap_level_zero", 0x05F, 202, {H, H, SH}, FaultStat()};
+ SparcFault<TrapLevelZero>::vals
+("trap_level_zero", 0x05F, 202, {{H, H, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<InterruptVector>::vals =
-{"interrupt_vector", 0x060, 2630, {H, H, H}, FaultStat()};
+ SparcFault<InterruptVector>::vals
+("interrupt_vector", 0x060, 2630, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<PAWatchpoint>::vals =
-{"PA_watchpoint", 0x061, 1209, {H, H, H}, FaultStat()};
+ SparcFault<PAWatchpoint>::vals
+("PA_watchpoint", 0x061, 1209, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<VAWatchpoint>::vals =
-{"VA_watchpoint", 0x062, 1120, {P, P, SH}, FaultStat()};
+ SparcFault<VAWatchpoint>::vals
+("VA_watchpoint", 0x062, 1120, {{P, P, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<FastInstructionAccessMMUMiss>::vals =
-{"fast_instruction_access_MMU_miss", 0x064, 208, {H, H, SH}, FaultStat()};
+ SparcFault<FastInstructionAccessMMUMiss>::vals
+("fast_instruction_access_MMU_miss", 0x064, 208, {{H, H, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<FastDataAccessMMUMiss>::vals =
-{"fast_data_access_MMU_miss", 0x068, 1203, {H, H, H}, FaultStat()};
+ SparcFault<FastDataAccessMMUMiss>::vals
+("fast_data_access_MMU_miss", 0x068, 1203, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<FastDataAccessProtection>::vals =
-{"fast_data_access_protection", 0x06C, 1207, {H, H, H}, FaultStat()};
+ SparcFault<FastDataAccessProtection>::vals
+("fast_data_access_protection", 0x06C, 1207, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<InstructionBreakpoint>::vals =
-{"instruction_break", 0x076, 610, {H, H, H}, FaultStat()};
+ SparcFault<InstructionBreakpoint>::vals
+("instruction_break", 0x076, 610, {{H, H, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<CpuMondo>::vals =
-{"cpu_mondo", 0x07C, 1608, {P, P, SH}, FaultStat()};
+ SparcFault<CpuMondo>::vals
+("cpu_mondo", 0x07C, 1608, {{P, P, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<DevMondo>::vals =
-{"dev_mondo", 0x07D, 1611, {P, P, SH}, FaultStat()};
+ SparcFault<DevMondo>::vals
+("dev_mondo", 0x07D, 1611, {{P, P, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<ResumableError>::vals =
-{"resume_error", 0x07E, 3330, {P, P, SH}, FaultStat()};
+ SparcFault<ResumableError>::vals
+("resume_error", 0x07E, 3330, {{P, P, SH}});
template<> SparcFaultBase::FaultVals
- SparcFault<SpillNNormal>::vals =
-{"spill_n_normal", 0x080, 900, {P, P, H}, FaultStat()};
+ SparcFault<SpillNNormal>::vals
+("spill_n_normal", 0x080, 900, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<SpillNOther>::vals =
-{"spill_n_other", 0x0A0, 900, {P, P, H}, FaultStat()};
+ SparcFault<SpillNOther>::vals
+("spill_n_other", 0x0A0, 900, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<FillNNormal>::vals =
-{"fill_n_normal", 0x0C0, 900, {P, P, H}, FaultStat()};
+ SparcFault<FillNNormal>::vals
+("fill_n_normal", 0x0C0, 900, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<FillNOther>::vals =
-{"fill_n_other", 0x0E0, 900, {P, P, H}, FaultStat()};
+ SparcFault<FillNOther>::vals
+("fill_n_other", 0x0E0, 900, {{P, P, H}});
template<> SparcFaultBase::FaultVals
- SparcFault<TrapInstruction>::vals =
-{"trap_instruction", 0x100, 1602, {P, P, H}, FaultStat()};
+ SparcFault<TrapInstruction>::vals
+("trap_instruction", 0x100, 1602, {{P, P, H}});
/**
* This causes the thread context to enter RED state. This causes the side
void
doREDFault(ThreadContext *tc, TrapType tt)
{
- MiscReg TL = tc->readMiscRegNoEffect(MISCREG_TL);
- MiscReg TSTATE = tc->readMiscRegNoEffect(MISCREG_TSTATE);
+ RegVal TL = tc->readMiscRegNoEffect(MISCREG_TL);
+ RegVal TSTATE = tc->readMiscRegNoEffect(MISCREG_TSTATE);
PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE);
HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE);
- MiscReg CCR = tc->readIntReg(NumIntArchRegs + 2);
- MiscReg ASI = tc->readMiscRegNoEffect(MISCREG_ASI);
- MiscReg CWP = tc->readMiscRegNoEffect(MISCREG_CWP);
- MiscReg CANSAVE = tc->readMiscRegNoEffect(NumIntArchRegs + 3);
- MiscReg GL = tc->readMiscRegNoEffect(MISCREG_GL);
+ RegVal CCR = tc->readIntReg(NumIntArchRegs + 2);
+ RegVal ASI = tc->readMiscRegNoEffect(MISCREG_ASI);
+ RegVal CWP = tc->readMiscRegNoEffect(MISCREG_CWP);
+ RegVal CANSAVE = tc->readMiscRegNoEffect(NumIntArchRegs + 3);
+ RegVal GL = tc->readMiscRegNoEffect(MISCREG_GL);
PCState pc = tc->pcState();
TL++;
void
doNormalFault(ThreadContext *tc, TrapType tt, bool gotoHpriv)
{
- MiscReg TL = tc->readMiscRegNoEffect(MISCREG_TL);
- MiscReg TSTATE = tc->readMiscRegNoEffect(MISCREG_TSTATE);
+ RegVal TL = tc->readMiscRegNoEffect(MISCREG_TL);
+ RegVal TSTATE = tc->readMiscRegNoEffect(MISCREG_TSTATE);
PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE);
HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE);
- MiscReg CCR = tc->readIntReg(NumIntArchRegs + 2);
- MiscReg ASI = tc->readMiscRegNoEffect(MISCREG_ASI);
- MiscReg CWP = tc->readMiscRegNoEffect(MISCREG_CWP);
- MiscReg CANSAVE = tc->readIntReg(NumIntArchRegs + 3);
- MiscReg GL = tc->readMiscRegNoEffect(MISCREG_GL);
+ RegVal CCR = tc->readIntReg(NumIntArchRegs + 2);
+ RegVal ASI = tc->readMiscRegNoEffect(MISCREG_ASI);
+ RegVal CWP = tc->readMiscRegNoEffect(MISCREG_CWP);
+ RegVal CANSAVE = tc->readIntReg(NumIntArchRegs + 3);
+ RegVal GL = tc->readMiscRegNoEffect(MISCREG_GL);
PCState pc = tc->pcState();
// Increment the trap level
}
void
-getREDVector(MiscReg TT, Addr &PC, Addr &NPC)
+getREDVector(RegVal TT, Addr &PC, Addr &NPC)
{
//XXX The following constant might belong in a header file.
const Addr RSTVAddr = 0xFFF0000000ULL;
}
void
-getHyperVector(ThreadContext * tc, Addr &PC, Addr &NPC, MiscReg TT)
+getHyperVector(ThreadContext * tc, Addr &PC, Addr &NPC, RegVal TT)
{
Addr HTBA = tc->readMiscRegNoEffect(MISCREG_HTBA);
PC = (HTBA & ~mask(14)) | ((TT << 5) & mask(14));
}
void
-getPrivVector(ThreadContext *tc, Addr &PC, Addr &NPC, MiscReg TT, MiscReg TL)
+getPrivVector(ThreadContext *tc, Addr &PC, Addr &NPC, RegVal TT, RegVal TL)
{
Addr TBA = tc->readMiscRegNoEffect(MISCREG_TBA);
PC = (TBA & ~mask(15)) |
}
void
-SparcFaultBase::invoke(ThreadContext * tc, StaticInstPtr inst)
+SparcFaultBase::invoke(ThreadContext * tc, const StaticInstPtr &inst)
{
FaultBase::invoke(tc);
if (!FullSystem)
// We can refer to this to see what the trap level -was-, but something
// in the middle could change it in the regfile out from under us.
- MiscReg tl = tc->readMiscRegNoEffect(MISCREG_TL);
- MiscReg tt = tc->readMiscRegNoEffect(MISCREG_TT);
+ RegVal tl = tc->readMiscRegNoEffect(MISCREG_TL);
+ RegVal tt = tc->readMiscRegNoEffect(MISCREG_TT);
PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE);
HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE);
}
void
-PowerOnReset::invoke(ThreadContext *tc, StaticInstPtr inst)
+PowerOnReset::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
// For SPARC, when a system is first started, there is a power
// on reset Trap which sets the processor into the following state.
}
void
-FastInstructionAccessMMUMiss::invoke(ThreadContext *tc, StaticInstPtr inst)
+FastInstructionAccessMMUMiss::invoke(ThreadContext *tc,
+ const StaticInstPtr &inst)
{
if (FullSystem) {
SparcFaultBase::invoke(tc, inst);
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(vaddr, entry);
- if (!success) {
- panic("Tried to execute unmapped address %#x.\n", vaddr);
- } else {
- Addr alignedVaddr = p->pTable->pageAlign(vaddr);
- tc->getITBPtr()->insert(alignedVaddr, 0 /*partition id*/,
- p->M5_pid /*context id*/, false, entry.pte);
- }
+ const EmulationPageTable::Entry *pte = p->pTable->lookup(vaddr);
+ panic_if(!pte, "Tried to execute unmapped address %#x.\n", vaddr);
+
+ Addr alignedvaddr = p->pTable->pageAlign(vaddr);
+
+ // Grab fields used during instruction translation to figure out
+ // which context to use.
+ uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
+
+ // Inside a VM, a real address is the address that guest OS would
+ // interpret to be a physical address. To map to the physical address,
+ // it still needs to undergo a translation. The instruction
+ // translation code in the SPARC ITLB code assumes that the context is
+ // zero (kernel-level) if real addressing is being used.
+ bool is_real_address = !bits(tlbdata, 4);
+
+ // The SPARC ITLB code assumes that traps are executed in context
+ // zero so we carry that assumption through here.
+ bool trapped = bits(tlbdata, 18, 16) > 0;
+
+ // The primary context acts as a PASID. It allows the MMU to
+ // distinguish between virtual addresses that would alias to the
+ // same physical address (if two or more processes shared the same
+ // virtual address mapping).
+ int primary_context = bits(tlbdata, 47, 32);
+
+ // The partition id distinguishes between virtualized environments.
+ int const partition_id = 0;
+
+ // Given the assumptions in the translateInst code in the SPARC ITLB,
+ // the logic works out to the following for the context.
+ int context_id = (is_real_address || trapped) ? 0 : primary_context;
+
+ TlbEntry entry(p->pTable->pid(), alignedvaddr, pte->paddr,
+ pte->flags & EmulationPageTable::Uncacheable,
+ pte->flags & EmulationPageTable::ReadOnly);
+
+ // Insert the TLB entry.
+ // The entry specifying whether the address is "real" is set to
+ // false for syscall emulation mode regardless of whether the
+ // address is real in preceding code. Not sure sure that this is
+ // correct, but also not sure if it matters at all.
+ dynamic_cast<TLB *>(tc->getITBPtr())->
+ insert(alignedvaddr, partition_id, context_id, false, entry.pte);
}
void
-FastDataAccessMMUMiss::invoke(ThreadContext *tc, StaticInstPtr inst)
+FastDataAccessMMUMiss::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
if (FullSystem) {
SparcFaultBase::invoke(tc, inst);
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(vaddr, entry);
- if (!success) {
- if (p->fixupStackFault(vaddr))
- success = p->pTable->lookup(vaddr, entry);
- }
- if (!success) {
- panic("Tried to access unmapped address %#x.\n", vaddr);
- } else {
- Addr alignedVaddr = p->pTable->pageAlign(vaddr);
- tc->getDTBPtr()->insert(alignedVaddr, 0 /*partition id*/,
- p->M5_pid /*context id*/, false, entry.pte);
- }
+ const EmulationPageTable::Entry *pte = p->pTable->lookup(vaddr);
+ if (!pte && p->fixupStackFault(vaddr))
+ pte = p->pTable->lookup(vaddr);
+ panic_if(!pte, "Tried to access unmapped address %#x.\n", vaddr);
+
+ Addr alignedvaddr = p->pTable->pageAlign(vaddr);
+
+ // Grab fields used during data translation to figure out
+ // which context to use.
+ uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
+
+ // The primary context acts as a PASID. It allows the MMU to
+ // distinguish between virtual addresses that would alias to the
+ // same physical address (if two or more processes shared the same
+ // virtual address mapping). There's a secondary context used in the
+ // DTLB translation code, but it should __probably__ be zero for
+ // syscall emulation code. (The secondary context is used by Solaris
+ // to allow kernel privilege code to access user space code:
+ // [ISBN 0-13-022496-0]:PG199.)
+ int primary_context = bits(tlbdata, 47, 32);
+
+ // "Hyper-Privileged Mode" is in use. There are three main modes of
+ // operation for Sparc: Hyper-Privileged Mode, Privileged Mode, and
+ // User Mode.
+ int hpriv = bits(tlbdata, 0);
+
+ // Reset, Error and Debug state is in use. Something horrible has
+ // happened or the system is operating in Reset Mode.
+ int red = bits(tlbdata, 1);
+
+ // Inside a VM, a real address is the address that guest OS would
+ // interpret to be a physical address. To map to the physical address,
+ // it still needs to undergo a translation. The instruction
+ // translation code in the SPARC ITLB code assumes that the context is
+ // zero (kernel-level) if real addressing is being used.
+ int is_real_address = !bits(tlbdata, 5);
+
+ // Grab the address space identifier register from the thread context.
+ // XXX: Inspecting how setMiscReg and setMiscRegNoEffect behave for
+ // MISCREG_ASI causes me to think that the ASI register implementation
+ // might be bugged. The NoEffect variant changes the ASI register
+ // value in the architectural state while the normal variant changes
+ // the context field in the thread context's currently decoded request
+ // but does not directly affect the ASI register value in the
+ // architectural state. The ASI values and the context field in the
+ // request packet seem to have completely different uses.
+ RegVal reg_asi = tc->readMiscRegNoEffect(MISCREG_ASI);
+ ASI asi = static_cast<ASI>(reg_asi);
+
+ // The SPARC DTLB code assumes that traps are executed in context
+ // zero if the asi value is ASI_IMPLICIT (which is 0x0). There's also
+ // an assumption that the nucleus address space is being used, but
+ // the context is the relevant issue since we need to pass it to TLB.
+ bool trapped = bits(tlbdata, 18, 16) > 0;
+
+ // Given the assumptions in the translateData code in the SPARC DTLB,
+ // the logic works out to the following for the context.
+ int context_id = ((!hpriv && !red && is_real_address) ||
+ asiIsReal(asi) ||
+ (trapped && asi == ASI_IMPLICIT))
+ ? 0 : primary_context;
+
+ // The partition id distinguishes between virtualized environments.
+ int const partition_id = 0;
+
+ TlbEntry entry(p->pTable->pid(), alignedvaddr, pte->paddr,
+ pte->flags & EmulationPageTable::Uncacheable,
+ pte->flags & EmulationPageTable::ReadOnly);
+
+ // Insert the TLB entry.
+ // The entry specifying whether the address is "real" is set to
+ // false for syscall emulation mode regardless of whether the
+ // address is real in preceding code. Not sure sure that this is
+ // correct, but also not sure if it matters at all.
+ dynamic_cast<TLB *>(tc->getDTBPtr())->
+ insert(alignedvaddr, partition_id, context_id, false, entry.pte);
}
void
-SpillNNormal::invoke(ThreadContext *tc, StaticInstPtr inst)
+SpillNNormal::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
if (FullSystem) {
SparcFaultBase::invoke(tc, inst);
Process *p = tc->getProcessPtr();
- //XXX This will only work in faults from a SparcLiveProcess
- SparcLiveProcess *lp = dynamic_cast<SparcLiveProcess *>(p);
- assert(lp);
+ SparcProcess *sp = dynamic_cast<SparcProcess *>(p);
+ assert(sp);
// Then adjust the PC and NPC
- tc->pcState(lp->readSpillStart());
+ tc->pcState(sp->readSpillStart());
}
void
-FillNNormal::invoke(ThreadContext *tc, StaticInstPtr inst)
+FillNNormal::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
if (FullSystem) {
SparcFaultBase::invoke(tc, inst);
Process *p = tc->getProcessPtr();
- //XXX This will only work in faults from a SparcLiveProcess
- SparcLiveProcess *lp = dynamic_cast<SparcLiveProcess *>(p);
- assert(lp);
+ SparcProcess *sp = dynamic_cast<SparcProcess *>(p);
+ assert(sp);
// Then adjust the PC and NPC
- tc->pcState(lp->readFillStart());
+ tc->pcState(sp->readFillStart());
}
void
-TrapInstruction::invoke(ThreadContext *tc, StaticInstPtr inst)
+TrapInstruction::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
if (FullSystem) {
SparcFaultBase::invoke(tc, inst);
Process *p = tc->getProcessPtr();
- SparcLiveProcess *lp = dynamic_cast<SparcLiveProcess *>(p);
- assert(lp);
+ SparcProcess *sp = dynamic_cast<SparcProcess *>(p);
+ assert(sp);
- lp->handleTrap(_n, tc);
+ Fault fault;
+ sp->handleTrap(_n, tc, &fault);
// We need to explicitly advance the pc, since that's not done for us
// on a faulting instruction
projects / gem5.git / blobdiff