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-rw-r--r--arch/alpha/alpha_memory.cc4
-rw-r--r--arch/alpha/ev5.cc67
-rw-r--r--arch/alpha/ev5.hh2
-rw-r--r--arch/alpha/isa_traits.hh10
-rw-r--r--cpu/exec_context.cc15
-rw-r--r--cpu/exec_context.hh24
-rw-r--r--cpu/simple_cpu/simple_cpu.cc3
-rw-r--r--cpu/static_inst.hh6
8 files changed, 125 insertions, 6 deletions
diff --git a/arch/alpha/alpha_memory.cc b/arch/alpha/alpha_memory.cc
index 1608cc4a4..23815bf01 100644
--- a/arch/alpha/alpha_memory.cc
+++ b/arch/alpha/alpha_memory.cc
@@ -425,8 +425,8 @@ AlphaDTB::fault(Addr vaddr, uint64_t flags, ExecContext *xc) const
ipr[AlphaISA::IPR_VA] = vaddr;
// set MM_STAT register flags
- ipr[AlphaISA::IPR_MM_STAT] = (((xc->regs.opcode & 0x3f) << 11)
- | ((xc->regs.ra & 0x1f) << 6)
+ ipr[AlphaISA::IPR_MM_STAT] = (((OPCODE(xc->getInst()) & 0x3f) << 11)
+ | ((RA(xc->getInst()) & 0x1f) << 6)
| (flags & 0x3f));
// set VA_FORM register with faulting formatted address
diff --git a/arch/alpha/ev5.cc b/arch/alpha/ev5.cc
index 96d54c54c..e88f6d0a3 100644
--- a/arch/alpha/ev5.cc
+++ b/arch/alpha/ev5.cc
@@ -7,6 +7,7 @@
#include "base/remote_gdb.hh"
#include "base/stats/events.hh"
#include "cpu/exec_context.hh"
+#include "cpu/fast_cpu/fast_cpu.hh"
#include "sim/debug.hh"
#include "sim/sim_events.hh"
@@ -98,6 +99,64 @@ AlphaISA::initIPRs(RegFile *regs)
}
+template <class XC>
+void
+AlphaISA::processInterrupts(XC *xc)
+{
+ //Check if there are any outstanding interrupts
+ //Handle the interrupts
+ int ipl = 0;
+ int summary = 0;
+ IntReg *ipr = xc->getIprPtr();
+
+ check_interrupts = 0;
+
+ if (ipr[IPR_ASTRR])
+ panic("asynchronous traps not implemented\n");
+
+ if (ipr[IPR_SIRR]) {
+ for (int i = INTLEVEL_SOFTWARE_MIN;
+ i < INTLEVEL_SOFTWARE_MAX; i++) {
+ if (ipr[IPR_SIRR] & (ULL(1) << i)) {
+ // See table 4-19 of the 21164 hardware reference
+ ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1;
+ summary |= (ULL(1) << i);
+ }
+ }
+ }
+
+ uint64_t interrupts = xc->intr_status();
+
+ if (interrupts) {
+ for (int i = INTLEVEL_EXTERNAL_MIN;
+ i < INTLEVEL_EXTERNAL_MAX; i++) {
+ if (interrupts & (ULL(1) << i)) {
+ // See table 4-19 of the 21164 hardware reference
+ ipl = i;
+ summary |= (ULL(1) << i);
+ }
+ }
+ }
+
+ if (ipl && ipl > ipr[IPR_IPLR]) {
+ ipr[IPR_ISR] = summary;
+ ipr[IPR_INTID] = ipl;
+ xc->trap(Interrupt_Fault);
+ DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
+ ipr[IPR_IPLR], ipl, summary);
+ }
+
+}
+
+template <class XC>
+void
+AlphaISA::zeroRegisters(XC *xc)
+{
+ // Insure ISA semantics
+ xc->setIntReg(ZeroReg, 0);
+ xc->setFloatRegDouble(ZeroReg, 0.0);
+}
+
void
ExecContext::ev5_trap(Fault fault)
{
@@ -582,4 +641,12 @@ ExecContext::simPalCheck(int palFunc)
return true;
}
+//Forward instantiation for FastCPU object
+template
+void AlphaISA::processInterrupts(FastCPU *xc);
+
+//Forward instantiation for FastCPU object
+template
+void AlphaISA::zeroRegisters(FastCPU *xc);
+
#endif // FULL_SYSTEM
diff --git a/arch/alpha/ev5.hh b/arch/alpha/ev5.hh
index aa3d7e226..6947ef708 100644
--- a/arch/alpha/ev5.hh
+++ b/arch/alpha/ev5.hh
@@ -71,6 +71,8 @@
#define MM_STAT_ACV_MASK 0x0002
#define MM_STAT_WR_MASK 0x0001
+#define OPCODE(X) (X >> 26) & 0x3f
+#define RA(X) (X >> 21) & 0x1f
////////////////////////////////////////////////////////////////////////
//
diff --git a/arch/alpha/isa_traits.hh b/arch/alpha/isa_traits.hh
index 05ab89978..37ba77192 100644
--- a/arch/alpha/isa_traits.hh
+++ b/arch/alpha/isa_traits.hh
@@ -33,6 +33,7 @@
#include "targetarch/faults.hh"
#include "base/misc.hh"
+class FastCPU;
class FullCPU;
class Checkpoint;
@@ -156,8 +157,6 @@ class AlphaISA
int intrflag; // interrupt flag
bool pal_shadow; // using pal_shadow registers
#endif // FULL_SYSTEM
- // Are these architectural, or just for convenience?
- uint8_t opcode, ra; // current instruction details (for intr's)
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string &section);
@@ -233,6 +232,13 @@ class AlphaISA
ConfigNode *node,
RegFile &regs);
#endif
+
+ /**
+ * Function to insure ISA semantics about 0 registers.
+ * @param xc The execution context.
+ */
+ template <class XC>
+ static void zeroRegisters(XC *xc);
};
diff --git a/cpu/exec_context.cc b/cpu/exec_context.cc
index 7f7719bf0..0d3a80fe7 100644
--- a/cpu/exec_context.cc
+++ b/cpu/exec_context.cc
@@ -106,6 +106,7 @@ ExecContext::serialize(ostream &os)
regs.serialize(os);
// thread_num and cpu_id are deterministic from the config
SERIALIZE_SCALAR(func_exe_inst);
+ SERIALIZE_SCALAR(inst);
#ifdef FULL_SYSTEM
bool ctx = false;
@@ -143,6 +144,7 @@ ExecContext::unserialize(Checkpoint *cp, const std::string &section)
regs.unserialize(cp, section);
// thread_num and cpu_id are deterministic from the config
UNSERIALIZE_SCALAR(func_exe_inst);
+ UNSERIALIZE_SCALAR(inst);
#ifdef FULL_SYSTEM
bool ctx;
@@ -233,3 +235,16 @@ ExecContext::regStats(const string &name)
kernelStats.regStats(name + ".kern");
#endif
}
+
+void
+ExecContext::trap(Fault fault)
+{
+ //TheISA::trap(fault); //One possible way to do it...
+
+ /** @todo: Going to hack it for now. Do a true fixup later. */
+#ifdef FULL_SYSTEM
+ ev5_trap(fault);
+#else
+ fatal("fault (%d) detected @ PC 0x%08p", fault, readPC());
+#endif
+}
diff --git a/cpu/exec_context.hh b/cpu/exec_context.hh
index 7be83539a..a62225f1b 100644
--- a/cpu/exec_context.hh
+++ b/cpu/exec_context.hh
@@ -31,6 +31,7 @@
#include "sim/host.hh"
#include "mem/mem_req.hh"
+#include "mem/functional_mem/functional_memory.hh"
#include "sim/serialize.hh"
// forward declaration: see functional_memory.hh
@@ -114,6 +115,9 @@ class ExecContext
// pointer to CPU associated with this context
BaseCPU *cpu;
+ // Current instruction
+ MachInst inst;
+
// Index of hardware thread context on the CPU that this represents.
int thread_num;
@@ -311,6 +315,18 @@ class ExecContext
virtual bool misspeculating();
+ MachInst getInst() { return inst; }
+
+ void setInst(MachInst new_inst)
+ {
+ inst = new_inst;
+ }
+
+ Fault instRead(MemReqPtr &req)
+ {
+ return mem->read(req, inst);
+ }
+
//
// New accessors for new decoder.
//
@@ -395,6 +411,14 @@ class ExecContext
bool simPalCheck(int palFunc);
#endif
+ /** Meant to be more generic trap function to be
+ * called when an instruction faults.
+ * @param fault The fault generated by executing the instruction.
+ * @todo How to do this properly so it's dependent upon ISA only?
+ */
+
+ void trap(Fault fault);
+
#ifndef FULL_SYSTEM
IntReg getSyscallArg(int i)
{
diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 1ade235ed..e1a861ad8 100644
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -714,8 +714,7 @@ SimpleCPU::tick()
xc->regs.pc);
#ifdef FULL_SYSTEM
- xc->regs.opcode = (inst >> 26) & 0x3f;
- xc->regs.ra = (inst >> 21) & 0x1f;
+ xc->setInst(inst);
#endif // FULL_SYSTEM
xc->func_exe_inst++;
diff --git a/cpu/static_inst.hh b/cpu/static_inst.hh
index 088fdbdb7..3eeefb675 100644
--- a/cpu/static_inst.hh
+++ b/cpu/static_inst.hh
@@ -42,6 +42,7 @@
// forward declarations
class ExecContext;
class DynInst;
+class FastCPU;
class SimpleCPU;
class SymbolTable;
@@ -313,6 +314,11 @@ class StaticInst : public StaticInstBase
virtual Fault execute(SimpleCPU *xc, Trace::InstRecord *traceData) = 0;
/**
+ * Execute this instruction under FastCPU model.
+ */
+ virtual Fault execute(FastCPU *xc, Trace::InstRecord *traceData) = 0;
+
+ /**
* Execute this instruction under detailed FullCPU model.
*/
virtual Fault execute(DynInst *xc, Trace::InstRecord *traceData) = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 04:38:36 +0000