* Authors: Gabe Black
* Korey Sewell
* Jaidev Patwardhan
+ * Zhengxing Li
+ * Deyuan Guo
*/
#include "arch/mips/faults.hh"
-#include "cpu/thread_context.hh"
-#include "cpu/base.hh"
-#include "base/trace.hh"
#include "arch/mips/pra_constants.hh"
-#if !FULL_SYSTEM
-#include "sim/process.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/thread_context.hh"
+#include "debug/MipsPRA.hh"
#include "mem/page_table.hh"
-#endif
+#include "sim/process.hh"
namespace MipsISA
{
-FaultName MachineCheckFault::_name = "Machine Check";
-FaultVect MachineCheckFault::_vect = 0x0401;
-FaultStat MachineCheckFault::_count;
-
-FaultName AlignmentFault::_name = "Alignment";
-FaultVect AlignmentFault::_vect = 0x0301;
-FaultStat AlignmentFault::_count;
-
-FaultName ResetFault::_name = "Reset Fault";
-#if FULL_SYSTEM
-FaultVect ResetFault::_vect = 0xBFC00000;
-#else
-FaultVect ResetFault::_vect = 0x001;
-#endif
-FaultStat ResetFault::_count;
-
-FaultName AddressErrorFault::_name = "Address Error";
-FaultVect AddressErrorFault::_vect = 0x0180;
-FaultStat AddressErrorFault::_count;
-
-FaultName StoreAddressErrorFault::_name = "Store Address Error";
-FaultVect StoreAddressErrorFault::_vect = 0x0180;
-FaultStat StoreAddressErrorFault::_count;
-
-
-FaultName SystemCallFault::_name = "Syscall";
-FaultVect SystemCallFault::_vect = 0x0180;
-FaultStat SystemCallFault::_count;
-
-FaultName CoprocessorUnusableFault::_name = "Coprocessor Unusable Fault";
-FaultVect CoprocessorUnusableFault::_vect = 0x180;
-FaultStat CoprocessorUnusableFault::_count;
+typedef MipsFaultBase::FaultVals FaultVals;
-FaultName ReservedInstructionFault::_name = "Reserved Instruction Fault";
-FaultVect ReservedInstructionFault::_vect = 0x0180;
-FaultStat ReservedInstructionFault::_count;
+template <> FaultVals MipsFault<SystemCallFault>::vals =
+ { "Syscall", 0x180, ExcCodeSys };
-FaultName ThreadFault::_name = "Thread Fault";
-FaultVect ThreadFault::_vect = 0x00F1;
-FaultStat ThreadFault::_count;
+template <> FaultVals MipsFault<ReservedInstructionFault>::vals =
+ { "Reserved Instruction Fault", 0x180, ExcCodeRI };
-FaultName ArithmeticFault::_name = "Arithmetic Overflow Exception";
-FaultVect ArithmeticFault::_vect = 0x180;
-FaultStat ArithmeticFault::_count;
+template <> FaultVals MipsFault<ThreadFault>::vals =
+ { "Thread Fault", 0x180, ExcCodeDummy };
-FaultName UnimplementedOpcodeFault::_name = "opdec";
-FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
-FaultStat UnimplementedOpcodeFault::_count;
+template <> FaultVals MipsFault<IntegerOverflowFault>::vals =
+ { "Integer Overflow Exception", 0x180, ExcCodeOv };
-FaultName InterruptFault::_name = "interrupt";
-FaultVect InterruptFault::_vect = 0x0180;
-FaultStat InterruptFault::_count;
+template <> FaultVals MipsFault<TrapFault>::vals =
+ { "Trap", 0x180, ExcCodeTr };
-FaultName TrapFault::_name = "Trap";
-FaultVect TrapFault::_vect = 0x0180;
-FaultStat TrapFault::_count;
+template <> FaultVals MipsFault<BreakpointFault>::vals =
+ { "Breakpoint", 0x180, ExcCodeBp };
-FaultName BreakpointFault::_name = "Breakpoint";
-FaultVect BreakpointFault::_vect = 0x0180;
-FaultStat BreakpointFault::_count;
+template <> FaultVals MipsFault<DspStateDisabledFault>::vals =
+ { "DSP Disabled Fault", 0x180, ExcCodeDummy };
-FaultName ItbInvalidFault::_name = "Invalid TLB Entry Exception (I-Fetch/LW)";
-FaultVect ItbInvalidFault::_vect = 0x0180;
-FaultStat ItbInvalidFault::_count;
+template <> FaultVals MipsFault<MachineCheckFault>::vals =
+ { "Machine Check", 0x180, ExcCodeMCheck };
-FaultName ItbPageFault::_name = "itbmiss";
-FaultVect ItbPageFault::_vect = 0x0181;
-FaultStat ItbPageFault::_count;
+template <> FaultVals MipsFault<ResetFault>::vals =
+ { "Reset Fault", 0x000, ExcCodeDummy };
-FaultName ItbMissFault::_name = "itbmiss";
-FaultVect ItbMissFault::_vect = 0x0181;
-FaultStat ItbMissFault::_count;
+template <> FaultVals MipsFault<SoftResetFault>::vals =
+ { "Soft Reset Fault", 0x000, ExcCodeDummy };
-FaultName ItbAcvFault::_name = "iaccvio";
-FaultVect ItbAcvFault::_vect = 0x0081;
-FaultStat ItbAcvFault::_count;
+template <> FaultVals MipsFault<NonMaskableInterrupt>::vals =
+ { "Non Maskable Interrupt", 0x000, ExcCodeDummy };
-FaultName ItbRefillFault::_name = "TLB Refill Exception (I-Fetch/LW)";
-FaultVect ItbRefillFault::_vect = 0x0180;
-FaultStat ItbRefillFault::_count;
+template <> FaultVals MipsFault<CoprocessorUnusableFault>::vals =
+ { "Coprocessor Unusable Fault", 0x180, ExcCodeCpU };
-FaultName NDtbMissFault::_name = "dtb_miss_single";
-FaultVect NDtbMissFault::_vect = 0x0201;
-FaultStat NDtbMissFault::_count;
+template <> FaultVals MipsFault<InterruptFault>::vals =
+ { "Interrupt", 0x000, ExcCodeInt };
-FaultName PDtbMissFault::_name = "dtb_miss_double";
-FaultVect PDtbMissFault::_vect = 0x0281;
-FaultStat PDtbMissFault::_count;
+template <> FaultVals MipsFault<AddressErrorFault>::vals =
+ { "Address Error", 0x180, ExcCodeDummy };
-FaultName DtbPageFault::_name = "dfault";
-FaultVect DtbPageFault::_vect = 0x0381;
-FaultStat DtbPageFault::_count;
+template <> FaultVals MipsFault<TlbInvalidFault>::vals =
+ { "Invalid TLB Entry Exception", 0x180, ExcCodeDummy };
-FaultName DtbAcvFault::_name = "dfault";
-FaultVect DtbAcvFault::_vect = 0x0381;
-FaultStat DtbAcvFault::_count;
+template <> FaultVals MipsFault<TlbRefillFault>::vals =
+ { "TLB Refill Exception", 0x180, ExcCodeDummy };
-FaultName DtbInvalidFault::_name = "Invalid TLB Entry Exception (Store)";
-FaultVect DtbInvalidFault::_vect = 0x0180;
-FaultStat DtbInvalidFault::_count;
-
-FaultName DtbRefillFault::_name = "TLB Refill Exception (Store)";
-FaultVect DtbRefillFault::_vect = 0x0180;
-FaultStat DtbRefillFault::_count;
-
-FaultName TLBModifiedFault::_name = "TLB Modified Exception";
-FaultVect TLBModifiedFault::_vect = 0x0180;
-FaultStat TLBModifiedFault::_count;
-
-FaultName FloatEnableFault::_name = "float_enable_fault";
-FaultVect FloatEnableFault::_vect = 0x0581;
-FaultStat FloatEnableFault::_count;
-
-FaultName IntegerOverflowFault::_name = "Integer Overflow Fault";
-FaultVect IntegerOverflowFault::_vect = 0x0501;
-FaultStat IntegerOverflowFault::_count;
-
-FaultName DspStateDisabledFault::_name = "DSP Disabled Fault";
-FaultVect DspStateDisabledFault::_vect = 0x001a;
-FaultStat DspStateDisabledFault::_count;
-
-#if FULL_SYSTEM
-void
-MipsFault::setHandlerPC(Addr HandlerBase, ThreadContext *tc)
-{
- tc->setPC(HandlerBase);
- tc->setNextPC(HandlerBase + sizeof(MachInst));
- tc->setNextNPC(HandlerBase + 2 * sizeof(MachInst));
-}
+template <> MipsFaultBase::FaultVals MipsFault<TlbModifiedFault>::vals =
+ { "TLB Modified Exception", 0x180, ExcCodeMod };
void
-MipsFault::setExceptionState(ThreadContext *tc, uint8_t excCode)
+MipsFaultBase::setExceptionState(ThreadContext *tc, uint8_t excCode)
{
// modify SRS Ctl - Save CSS, put ESS into CSS
StatusReg status = tc->readMiscReg(MISCREG_STATUS);
tc->setMiscRegNoEffect(MISCREG_STATUS, status);
// write EPC
- // CHECK ME or FIXME or FIX ME or POSSIBLE HACK
- // Check to see if the exception occurred in the branch delay slot
- DPRINTF(MipsPRA, "PC: %x, NextPC: %x, NNPC: %x\n",
- tc->readPC(), tc->readNextPC(), tc->readNextNPC());
- int bd = 0;
- if (tc->readPC() + sizeof(MachInst) != tc->readNextPC()) {
- tc->setMiscRegNoEffect(MISCREG_EPC, tc->readPC() - sizeof(MachInst));
- // In the branch delay slot? set CAUSE_31
- bd = 1;
- } else {
- tc->setMiscRegNoEffect(MISCREG_EPC, tc->readPC());
- // In the branch delay slot? reset CAUSE_31
- bd = 0;
- }
+ PCState pc = tc->pcState();
+ DPRINTF(MipsPRA, "PC: %s\n", pc);
+ bool delay_slot = pc.pc() + sizeof(MachInst) != pc.npc();
+ tc->setMiscRegNoEffect(MISCREG_EPC,
+ pc.pc() - (delay_slot ? sizeof(MachInst) : 0));
// Set Cause_EXCCODE field
CauseReg cause = tc->readMiscReg(MISCREG_CAUSE);
cause.excCode = excCode;
- cause.bd = bd;
+ cause.bd = delay_slot ? 1 : 0;
cause.ce = 0;
tc->setMiscRegNoEffect(MISCREG_CAUSE, cause);
}
void
-ArithmeticFault::invoke(ThreadContext *tc)
+MipsFaultBase::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0xC);
-
- // Set new PC
- Addr HandlerBase;
- StatusReg status = tc->readMiscReg(MISCREG_STATUS);
- // Here, the handler is dependent on BEV, which is not modified by
- // setExceptionState()
- if (!status.bev) {
- // See MIPS ARM Vol 3, Revision 2, Page 38
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
+ if (FullSystem) {
+ DPRINTF(MipsPRA, "Fault %s encountered.\n", name());
+ setExceptionState(tc, code());
+ tc->pcState(vect(tc));
} else {
- HandlerBase = 0xBFC00200;
+ panic("Fault %s encountered.\n", name());
}
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-StoreAddressErrorFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x5);
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
}
void
-TrapFault::invoke(ThreadContext *tc)
+ResetFault::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0xD);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-BreakpointFault::invoke(ThreadContext *tc)
-{
- setExceptionState(tc, 0x9);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-DtbInvalidFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
-
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
- EntryHiReg entryHi = tc->readMiscReg(MISCREG_ENTRYHI);
- entryHi.asid = entryHiAsid;
- entryHi.vpn2 = entryHiVPN2;
- entryHi.vpn2x = entryHiVPN2X;
- tc->setMiscRegNoEffect(MISCREG_ENTRYHI, entryHi);
-
- ContextReg context = tc->readMiscReg(MISCREG_CONTEXT);
- context.badVPN2 = contextBadVPN2;
- tc->setMiscRegNoEffect(MISCREG_CONTEXT, context);
- setExceptionState(tc, 0x3);
-
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-AddressErrorFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x4);
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-ItbInvalidFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x2);
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
- EntryHiReg entryHi = tc->readMiscReg(MISCREG_ENTRYHI);
- entryHi.asid = entryHiAsid;
- entryHi.vpn2 = entryHiVPN2;
- entryHi.vpn2x = entryHiVPN2X;
- tc->setMiscRegNoEffect(MISCREG_ENTRYHI, entryHi);
-
- ContextReg context = tc->readMiscReg(MISCREG_CONTEXT);
- context.badVPN2 = contextBadVPN2;
- tc->setMiscRegNoEffect(MISCREG_CONTEXT, context);
-
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase,tc);
- DPRINTF(MipsPRA, "Exception Handler At: %x , EPC set to %x\n",
- HandlerBase, tc->readMiscReg(MISCREG_EPC));
-}
-
-void
-ItbRefillFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered (%x).\n", name(), MISCREG_BADVADDR);
- Addr HandlerBase;
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
- EntryHiReg entryHi = tc->readMiscReg(MISCREG_ENTRYHI);
- entryHi.asid = entryHiAsid;
- entryHi.vpn2 = entryHiVPN2;
- entryHi.vpn2x = entryHiVPN2X;
- tc->setMiscRegNoEffect(MISCREG_ENTRYHI, entryHi);
- ContextReg context = tc->readMiscReg(MISCREG_CONTEXT);
- context.badVPN2 = contextBadVPN2;
- tc->setMiscRegNoEffect(MISCREG_CONTEXT, context);
-
- StatusReg status = tc->readMiscReg(MISCREG_STATUS);
- // Since handler depends on EXL bit, must check EXL bit before setting it!!
- // See MIPS ARM Vol 3, Revision 2, Page 38
- if (status.exl == 1) {
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- } else {
- // Offset 0x000
- HandlerBase = tc->readMiscReg(MISCREG_EBASE);
+ if (FullSystem) {
+ DPRINTF(MipsPRA, "%s encountered.\n", name());
+ /* All reset activity must be invoked from here */
+ Addr handler = vect(tc);
+ tc->pcState(handler);
+ DPRINTF(MipsPRA, "ResetFault::invoke : PC set to %x", handler);
}
- setExceptionState(tc, 0x2);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-DtbRefillFault::invoke(ThreadContext *tc)
-{
- // Set new PC
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- Addr HandlerBase;
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
- EntryHiReg entryHi = tc->readMiscReg(MISCREG_ENTRYHI);
- entryHi.asid = entryHiAsid;
- entryHi.vpn2 = entryHiVPN2;
- entryHi.vpn2x = entryHiVPN2X;
- tc->setMiscRegNoEffect(MISCREG_ENTRYHI, entryHi);
-
- ContextReg context = tc->readMiscReg(MISCREG_CONTEXT);
- context.badVPN2 = contextBadVPN2;
- tc->setMiscRegNoEffect(MISCREG_CONTEXT, context);
-
- StatusReg status = tc->readMiscReg(MISCREG_STATUS);
- // Since handler depends on EXL bit, must check EXL bit before setting it!!
- // See MIPS ARM Vol 3, Revision 2, Page 38
- if (status.exl) {
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- } else {
- // Offset 0x000
- HandlerBase = tc->readMiscReg(MISCREG_EBASE);
- }
-
- setExceptionState(tc, 0x3);
-
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-TLBModifiedFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- tc->setMiscRegNoEffect(MISCREG_BADVADDR, badVAddr);
- EntryHiReg entryHi = tc->readMiscReg(MISCREG_ENTRYHI);
- entryHi.asid = entryHiAsid;
- entryHi.vpn2 = entryHiVPN2;
- entryHi.vpn2x = entryHiVPN2X;
- tc->setMiscRegNoEffect(MISCREG_ENTRYHI, entryHi);
-
- ContextReg context = tc->readMiscReg(MISCREG_CONTEXT);
- context.badVPN2 = contextBadVPN2;
- tc->setMiscRegNoEffect(MISCREG_CONTEXT, context);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setExceptionState(tc, 0x1);
- setHandlerPC(HandlerBase, tc);
-
-}
-
-void
-SystemCallFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x8);
-
- // Set new PC
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-}
-
-void
-InterruptFault::invoke(ThreadContext *tc)
-{
-#if FULL_SYSTEM
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x0A);
- Addr HandlerBase;
-
- CauseReg cause = tc->readMiscRegNoEffect(MISCREG_CAUSE);
- if (cause.iv) {
- // Offset 200 for release 2
- HandlerBase = 0x20 + vect() + tc->readMiscRegNoEffect(MISCREG_EBASE);
- } else {
- //Ofset at 180 for release 1
- HandlerBase = vect() + tc->readMiscRegNoEffect(MISCREG_EBASE);
- }
-
- setHandlerPC(HandlerBase, tc);
-#endif
-}
-
-#endif // FULL_SYSTEM
-
-void
-ResetFault::invoke(ThreadContext *tc)
-{
-#if FULL_SYSTEM
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- /* All reset activity must be invoked from here */
- tc->setPC(vect());
- tc->setNextPC(vect() + sizeof(MachInst));
- tc->setNextNPC(vect() + sizeof(MachInst) + sizeof(MachInst));
- DPRINTF(MipsPRA, "ResetFault::invoke : PC set to %x", tc->readPC());
-#endif
-
// Set Coprocessor 1 (Floating Point) To Usable
StatusReg status = tc->readMiscRegNoEffect(MISCREG_STATUS);
status.cu.cu1 = 1;
}
void
-ReservedInstructionFault::invoke(ThreadContext *tc)
-{
-#if FULL_SYSTEM
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0x0A);
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscRegNoEffect(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-#else
- panic("%s encountered.\n", name());
-#endif
-}
-
-void
-ThreadFault::invoke(ThreadContext *tc)
-{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- panic("%s encountered.\n", name());
-}
-
-void
-DspStateDisabledFault::invoke(ThreadContext *tc)
+SoftResetFault::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- panic("%s encountered.\n", name());
+ panic("Soft reset not implemented.\n");
}
void
-CoprocessorUnusableFault::invoke(ThreadContext *tc)
+NonMaskableInterrupt::invoke(ThreadContext *tc, const StaticInstPtr &inst)
{
-#if FULL_SYSTEM
- DPRINTF(MipsPRA, "%s encountered.\n", name());
- setExceptionState(tc, 0xb);
- // The ID of the coprocessor causing the exception is stored in
- // CoprocessorUnusableFault::coProcID
- CauseReg cause = tc->readMiscReg(MISCREG_CAUSE);
- cause.ce = coProcID;
- tc->setMiscRegNoEffect(MISCREG_CAUSE, cause);
-
- Addr HandlerBase;
- // Offset 0x180 - General Exception Vector
- HandlerBase = vect() + tc->readMiscReg(MISCREG_EBASE);
- setHandlerPC(HandlerBase, tc);
-
-#else
- warn("%s (CP%d) encountered.\n", name(), coProcID);
-#endif
+ panic("Non maskable interrupt not implemented.\n");
}
} // namespace MipsISA
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