dev: prevent RTC events firing before startup

This change includes edits to MC146818 timer to prevent RTC 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/cmos.cc b/src/dev/x86/cmos.cc
index d7107deb7..6a778b758 100644
--- a/src/dev/x86/cmos.cc
+++ b/src/dev/x86/cmos.cc
@@ -113,6 +113,12 @@ X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
 }
 
 void
+X86ISA::Cmos::startup()
+{
+    rtc.startup();
+}
+
+void
 X86ISA::Cmos::serialize(std::ostream &os)
 {
     SERIALIZE_SCALAR(address);
diff --git a/src/dev/x86/cmos.hh b/src/dev/x86/cmos.hh
index 7957e5304..fa5865c0a 100644
--- a/src/dev/x86/cmos.hh
+++ b/src/dev/x86/cmos.hh
@@ -82,6 +82,7 @@ class Cmos : public BasicPioDevice
 
     Tick write(PacketPtr pkt);
 
+    virtual void startup();
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);