dev: prevent intel 8254 timer counter events firing before startup

This change includes edits to Intel8254Timer to prevent counter events firing
before startup to comply with SimObject initialization call sequence.

Committed by: Nilay Vaish <nilay@cs.wisc.edu>

2 files changed, 7 insertions, 0 deletions

diff --git a/src/dev/x86/i8254.cc b/src/dev/x86/i8254.cc
index f6af34a65..b80952237 100644
--- a/src/dev/x86/i8254.cc
+++ b/src/dev/x86/i8254.cc
@@ -89,6 +89,12 @@ X86ISA::I8254::unserialize(Checkpoint *cp, const std::string &section)
     pit.unserialize("pit", cp, section);
 }
 
+void
+X86ISA::I8254::startup()
+{
+    pit.startup();
+}
+
 X86ISA::I8254 *
 I8254Params::create()
 {
diff --git a/src/dev/x86/i8254.hh b/src/dev/x86/i8254.hh
index 49ea271e9..76521e73e 100644
--- a/src/dev/x86/i8254.hh
+++ b/src/dev/x86/i8254.hh
@@ -111,6 +111,7 @@ class I8254 : public BasicPioDevice
 
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);
+    virtual void startup();
 
 };