Merge zizzer.eecs.umich.edu:/bk/m5/

[gem5.git] / arch / alpha / ev5.cc

diff --git a/arch/alpha/ev5.cc b/arch/alpha/ev5.cc
index 96d54c54c66eadc6ae5bf34bf29c303447564c73..2e32da53147b9c8ea993405c092d975a741a8f72 100644 (file)
--- a/arch/alpha/ev5.cc
+++ b/arch/alpha/ev5.cc
@@ -6,15 +6,16 @@
 #include "base/kgdb.h"
 #include "base/remote_gdb.hh"
 #include "base/stats/events.hh"
+#include "cpu/base_cpu.hh"
 #include "cpu/exec_context.hh"
+#include "cpu/fast_cpu/fast_cpu.hh"
+#include "kern/kernel_stats.hh"
 #include "sim/debug.hh"
 #include "sim/sim_events.hh"
 
 #ifdef FULL_SYSTEM
 
-#ifndef SYSTEM_EV5
-#error This code is only valid for EV5 systems
-#endif
+using namespace EV5;
 
 ////////////////////////////////////////////////////////////////////////
 //
@@ -93,18 +94,79 @@ AlphaISA::initIPRs(RegFile *regs)
     uint64_t *ipr = regs->ipr;
 
     bzero((char *)ipr, NumInternalProcRegs * sizeof(InternalProcReg));
-    ipr[IPR_PAL_BASE] = PAL_BASE;
+    ipr[IPR_PAL_BASE] = PalBase;
     ipr[IPR_MCSR] = 0x6;
 }
 
 
+template <class CPU>
+void
+AlphaISA::processInterrupts(CPU *cpu)
+{
+    //Check if there are any outstanding interrupts
+    //Handle the interrupts
+    int ipl = 0;
+    int summary = 0;
+    IntReg *ipr = cpu->getIprPtr();
+
+    cpu->checkInterrupts = false;
+
+    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 = cpu->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;
+        cpu->trap(Interrupt_Fault);
+        DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
+                ipr[IPR_IPLR], ipl, summary);
+    }
+
+}
+
+template <class CPU>
+void
+AlphaISA::zeroRegisters(CPU *cpu)
+{
+    // Insure ISA semantics
+    // (no longer very clean due to the change in setIntReg() in the
+    // cpu model.  Consider changing later.)
+    cpu->xc->setIntReg(ZeroReg, 0);
+    cpu->xc->setFloatRegDouble(ZeroReg, 0.0);
+}
+
 void
 ExecContext::ev5_trap(Fault fault)
 {
-    Stats::recordEvent(csprintf("Fault %s", FaultName(fault)));
+    DPRINTF(Fault, "Fault %s at PC: %#x\n", FaultName(fault), regs.pc);
+    cpu->recordEvent(csprintf("Fault %s", FaultName(fault)));
 
     assert(!misspeculating());
-    kernelStats.fault(fault);
+    kernelStats->fault(fault);
 
     if (fault == Arithmetic_Fault)
         panic("Arithmetic traps are unimplemented!");
@@ -112,16 +174,16 @@ ExecContext::ev5_trap(Fault fault)
     AlphaISA::InternalProcReg *ipr = regs.ipr;
 
     // exception restart address
-    if (fault != Interrupt_Fault || !PC_PAL(regs.pc))
+    if (fault != Interrupt_Fault || !inPalMode())
         ipr[AlphaISA::IPR_EXC_ADDR] = regs.pc;
 
     if (fault == Pal_Fault || fault == Arithmetic_Fault /* ||
-        fault == Interrupt_Fault && !PC_PAL(regs.pc) */) {
+        fault == Interrupt_Fault && !inPalMode() */) {
         // traps...  skip faulting instruction
         ipr[AlphaISA::IPR_EXC_ADDR] += 4;
     }
 
-    if (!PC_PAL(regs.pc))
+    if (!inPalMode())
         AlphaISA::swap_palshadow(&regs, true);
 
     regs.pc = ipr[AlphaISA::IPR_PAL_BASE] + AlphaISA::fault_addr[fault];
@@ -156,25 +218,23 @@ AlphaISA::intr_post(RegFile *regs, Fault fault, Addr pc)
     // that's it! (orders of magnitude less painful than x86)
 }
 
-bool AlphaISA::check_interrupts = false;
-
 Fault
 ExecContext::hwrei()
 {
     uint64_t *ipr = regs.ipr;
 
-    if (!PC_PAL(regs.pc))
+    if (!inPalMode())
         return Unimplemented_Opcode_Fault;
 
     setNextPC(ipr[AlphaISA::IPR_EXC_ADDR]);
 
     if (!misspeculating()) {
-        kernelStats.hwrei();
+        kernelStats->hwrei();
 
         if ((ipr[AlphaISA::IPR_EXC_ADDR] & 1) == 0)
             AlphaISA::swap_palshadow(&regs, false);
 
-        AlphaISA::check_interrupts = true;
+        cpu->checkInterrupts = true;
     }
 
     // FIXME: XXX check for interrupts? XXX
@@ -241,11 +301,7 @@ ExecContext::readIpr(int idx, Fault &fault)
         break;
 
       case AlphaISA::IPR_VA:
-        // SFX: unlocks interrupt status registers
         retval = ipr[idx];
-
-        if (!misspeculating())
-            regs.intrlock = false;
         break;
 
       case AlphaISA::IPR_VA_FORM:
@@ -356,7 +412,7 @@ ExecContext::setIpr(int idx, uint64_t val)
         // write entire quad w/ no side-effect
         old = ipr[idx];
         ipr[idx] = val;
-        kernelStats.context(old, val);
+        kernelStats->context(old, val);
         break;
 
       case AlphaISA::IPR_DTB_PTE:
@@ -383,11 +439,14 @@ ExecContext::setIpr(int idx, uint64_t val)
 
         // only write least significant five bits - interrupt level
         ipr[idx] = val & 0x1f;
-        kernelStats.swpipl(ipr[idx]);
+        kernelStats->swpipl(ipr[idx]);
         break;
 
       case AlphaISA::IPR_DTB_CM:
-        kernelStats.mode((val & 0x18) != 0);
+        if (val & 0x18)
+            kernelStats->mode(Kernel::user);
+        else
+            kernelStats->mode(Kernel::kernel);
 
       case AlphaISA::IPR_ICM:
         // only write two mode bits - processor mode
@@ -563,7 +622,7 @@ ExecContext::setIpr(int idx, uint64_t val)
 bool
 ExecContext::simPalCheck(int palFunc)
 {
-    kernelStats.callpal(palFunc);
+    kernelStats->callpal(palFunc);
 
     switch (palFunc) {
       case PAL::halt:
@@ -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