Initial support processor idle functionality

xtoskrnl/po/idle.c

@@ -0,0 +1,50 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/po/idle.c
+ * DESCRIPTION:     Processor idle functionality support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Initializes Processor Control Block's (PRCB) power state structures.
+ *
+ * @param Prcb
+ *        Supplies a pointer to the PRCB being initialized.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+PoInitializeProcessorControlBlock(IN OUT PKPROCESSOR_CONTROL_BLOCK Prcb)
+{
+    RtlZeroMemory(&Prcb->PowerState, sizeof(Prcb->PowerState));
+
+    Prcb->PowerState.Idle0TimeLimit = 0xFFFFFFFF;
+    Prcb->PowerState.CurrentThrottle = 100;
+    Prcb->PowerState.IdleFunction = PopIdle0Function;
+
+    KeInitializeTimerEx(&Prcb->PowerState.PerfTimer, SynchronizationTimer);
+}
+
+/**
+ * Processor idle loop routine.
+ *
+ * @param PowerState
+ *        Supplies a pointer to the structere containing current processor power state.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTFASTCALL
+VOID
+PopIdle0Function(IN PPROCESSOR_POWER_STATE PowerState)
+{
+    UNIMPLEMENTED;
+}