Trace: Allow printing ASIDs and selectively tracing based on user/kernel code.

Debug flags are ExecUser, ExecKernel, and ExecAsid. ExecUser and
ExecKernel are set by default when Exec is specified.  Use minus
sign with ExecUser or ExecKernel to remove user or kernel tracing
respectively.

src/arch/alpha/utility.cc

@@ -29,7 +29,6 @@
  *          Ali Saidi
  */
 
-#include "arch/alpha/ev5.hh"
 #include "arch/alpha/utility.hh"
 
 #if FULL_SYSTEM

src/arch/alpha/utility.hh

@@ -39,6 +39,7 @@
 #include "config/full_system.hh"
 #include "cpu/static_inst.hh"
 #include "cpu/thread_context.hh"
+#include "arch/alpha/ev5.hh"
 
 namespace AlphaISA {
 
@@ -111,6 +112,12 @@ advancePC(PCState &pc, const StaticInstPtr inst)
     pc.advance();
 }
 
+inline uint64_t
+getExecutingAsid(ThreadContext *tc)
+{
+    return DTB_ASN_ASN(tc->readMiscRegNoEffect(IPR_DTB_ASN));
+}
+
 } // namespace AlphaISA
 
 #endif // __ARCH_ALPHA_UTILITY_HH__