From 9e8e2f9ec6ae4ea3be8f5280a1ca4cb734e3e068 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Sun, 12 Oct 2008 22:42:10 -0700
Subject: [PATCH] X86: Make the x86 interrupt fault kick off the interrupt
 microcode.

---
 src/arch/x86/faults.cc | 14 +++++++++++++-
 src/arch/x86/faults.hh | 19 +++++++++----------
 2 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/src/arch/x86/faults.cc b/src/arch/x86/faults.cc
index 1c94a1251..18680899e 100644
--- a/src/arch/x86/faults.cc
+++ b/src/arch/x86/faults.cc
@@ -85,6 +85,7 @@
  * Authors: Gabe Black
  */
 
+#include "arch/x86/decoder.hh"
 #include "arch/x86/faults.hh"
 #include "base/trace.hh"
 #include "config/full_system.hh"
@@ -112,7 +113,18 @@ namespace X86ISA
 
     void X86Interrupt::invoke(ThreadContext * tc)
     {
-        panic("X86 faults are not implemented!");
+        using namespace X86ISAInst::RomLabels;
+        HandyM5Reg m5reg = tc->readMiscRegNoEffect(MISCREG_M5_REG);
+        MicroPC entry;
+        if (m5reg.mode == LongMode) {
+            entry = extern_label_longModeInterrupt;
+        } else {
+            entry = extern_label_legacyModeInterrupt;
+        }
+        tc->setIntReg(INTREG_MICRO(1), vector);
+        tc->setIntReg(INTREG_MICRO(7), tc->readPC());
+        tc->setMicroPC(romMicroPC(entry));
+        tc->setNextMicroPC(romMicroPC(entry) + 1);
     }
 
     void FakeITLBFault::invoke(ThreadContext * tc)
diff --git a/src/arch/x86/faults.hh b/src/arch/x86/faults.hh
index b15ad15d1..b7948a638 100644
--- a/src/arch/x86/faults.hh
+++ b/src/arch/x86/faults.hh
@@ -137,9 +137,10 @@ namespace X86ISA
     class X86Interrupt : public X86FaultBase
     {
       protected:
-        X86Interrupt(const char * name, const char * mnem,
+        uint8_t vector;
+        X86Interrupt(const char * name, const char * mnem, uint8_t _vector,
                 uint64_t _errorCode = 0) :
-            X86FaultBase(name, mnem, _errorCode)
+            X86FaultBase(name, mnem, _errorCode), vector(_vector)
         {}
 
 #if FULL_SYSTEM
@@ -215,10 +216,9 @@ namespace X86ISA
 
     class NonMaskableInterrupt : public X86Interrupt
     {
-        uint8_t vector;
       public:
         NonMaskableInterrupt(uint8_t _vector) :
-            X86Interrupt("Non Maskable Interrupt", "#NMI"), vector(_vector)
+            X86Interrupt("Non Maskable Interrupt", "#NMI", _vector)
         {}
     };
 
@@ -352,10 +352,9 @@ namespace X86ISA
 
     class ExternalInterrupt : public X86Interrupt
     {
-        uint8_t vector;
       public:
         ExternalInterrupt(uint8_t _vector) :
-            X86Interrupt("External Interrupt", "#INTR"), vector(_vector)
+            X86Interrupt("External Interrupt", "#INTR", _vector)
         {}
     };
 
@@ -363,7 +362,7 @@ namespace X86ISA
     {
       public:
         SystemManagementInterrupt() :
-            X86Interrupt("System Management Interrupt", "#SMI")
+            X86Interrupt("System Management Interrupt", "#SMI", 0)
         {}
     };
 
@@ -372,15 +371,15 @@ namespace X86ISA
         uint8_t vector;
       public:
         InitInterrupt(uint8_t _vector) :
-            X86Interrupt("INIT Interrupt", "#INIT"), vector(_vector)
+            X86Interrupt("INIT Interrupt", "#INIT", _vector)
         {}
     };
 
     class SoftwareInterrupt : public X86Interrupt
     {
       public:
-        SoftwareInterrupt() :
-            X86Interrupt("Software Interrupt", "INTn")
+        SoftwareInterrupt(uint8_t _vector) :
+            X86Interrupt("Software Interrupt", "INTn", _vector)
         {}
     };