From 7a39457d7ff5fd80484061a4ff7006921899b229 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 12 Nov 2007 14:38:17 -0800
Subject: [PATCH] X86: Make the micropc available through the thread context
 objects. This is necssary for fault handlers that branch to non-zero micro
 PCs.

--HG--
extra : convert_revision : c1cb4863d779a9f4a508d0b450e64fb7a985f264
---
 src/cpu/o3/thread_context.hh      | 10 ++++++++++
 src/cpu/o3/thread_context_impl.hh | 30 +++++++++++++++++++++++++++++-
 src/cpu/thread_context.hh         | 16 ++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/src/cpu/o3/thread_context.hh b/src/cpu/o3/thread_context.hh
index 31e08db4c..55b385d11 100755
--- a/src/cpu/o3/thread_context.hh
+++ b/src/cpu/o3/thread_context.hh
@@ -203,6 +203,16 @@ class O3ThreadContext : public ThreadContext
     /** Sets this thread's next PC. */
     virtual void setNextPC(uint64_t val);
 
+    virtual uint64_t readMicroPC()
+    { return cpu->readMicroPC(thread->readTid()); }
+
+    virtual void setMicroPC(uint64_t val);
+
+    virtual uint64_t readNextMicroPC()
+    { return cpu->readNextMicroPC(thread->readTid()); }
+
+    virtual void setNextMicroPC(uint64_t val);
+
     /** Reads a miscellaneous register. */
     virtual MiscReg readMiscRegNoEffect(int misc_reg)
     { return cpu->readMiscRegNoEffect(misc_reg, thread->readTid()); }
diff --git a/src/cpu/o3/thread_context_impl.hh b/src/cpu/o3/thread_context_impl.hh
index efbbc2329..55584629e 100755
--- a/src/cpu/o3/thread_context_impl.hh
+++ b/src/cpu/o3/thread_context_impl.hh
@@ -289,9 +289,13 @@ O3ThreadContext<Impl>::copyArchRegs(ThreadContext *tc)
     // Copy the misc regs.
     TheISA::copyMiscRegs(tc, this);
 
-    // Then finally set the PC and the next PC.
+    // Then finally set the PC, the next PC, the nextNPC, the micropc, and the
+    // next micropc.
     cpu->setPC(tc->readPC(), tid);
     cpu->setNextPC(tc->readNextPC(), tid);
+    cpu->setNextNPC(tc->readNextNPC(), tid);
+    cpu->setMicroPC(tc->readMicroPC(), tid);
+    cpu->setNextMicroPC(tc->readNextMicroPC(), tid);
 #if !FULL_SYSTEM
     this->thread->funcExeInst = tc->readFuncExeInst();
 #endif
@@ -448,6 +452,30 @@ O3ThreadContext<Impl>::setNextPC(uint64_t val)
     }
 }
 
+template <class Impl>
+void
+O3ThreadContext<Impl>::setMicroPC(uint64_t val)
+{
+    cpu->setMicroPC(val, thread->readTid());
+
+    // Squash if we're not already in a state update mode.
+    if (!thread->trapPending && !thread->inSyscall) {
+        cpu->squashFromTC(thread->readTid());
+    }
+}
+
+template <class Impl>
+void
+O3ThreadContext<Impl>::setNextMicroPC(uint64_t val)
+{
+    cpu->setNextMicroPC(val, thread->readTid());
+
+    // Squash if we're not already in a state update mode.
+    if (!thread->trapPending && !thread->inSyscall) {
+        cpu->squashFromTC(thread->readTid());
+    }
+}
+
 template <class Impl>
 void
 O3ThreadContext<Impl>::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
diff --git a/src/cpu/thread_context.hh b/src/cpu/thread_context.hh
index 31fdb42c2..0d09492ee 100644
--- a/src/cpu/thread_context.hh
+++ b/src/cpu/thread_context.hh
@@ -226,6 +226,14 @@ class ThreadContext
 
     virtual void setNextNPC(uint64_t val) = 0;
 
+    virtual uint64_t readMicroPC() = 0;
+
+    virtual void setMicroPC(uint64_t val) = 0;
+
+    virtual uint64_t readNextMicroPC() = 0;
+
+    virtual void setNextMicroPC(uint64_t val) = 0;
+
     virtual MiscReg readMiscRegNoEffect(int misc_reg) = 0;
 
     virtual MiscReg readMiscReg(int misc_reg) = 0;
@@ -419,6 +427,14 @@ class ProxyThreadContext : public ThreadContext
 
     void setNextNPC(uint64_t val) { actualTC->setNextNPC(val); }
 
+    uint64_t readMicroPC() { return actualTC->readMicroPC(); }
+
+    void setMicroPC(uint64_t val) { actualTC->setMicroPC(val); }
+
+    uint64_t readNextMicroPC() { return actualTC->readMicroPC(); }
+
+    void setNextMicroPC(uint64_t val) { actualTC->setMicroPC(val); }
+
     MiscReg readMiscRegNoEffect(int misc_reg)
     { return actualTC->readMiscRegNoEffect(misc_reg); }
 
-- 
2.30.2