- Add an integer argument to idle to indicate how likely we are to wake

   from idle over the next tick.
 - Add a new MD routine, cpu_wake_idle() to wakeup idle threads who are
   suspended in cpu specific states.  This function can fail and cause the
   scheduler to fall back to another mechanism (ipi).
 - Implement support for mwait in cpu_idle() on i386/amd64 machines that
   support it.  mwait is a higher performance way to synchronize cpus
   as compared to hlt & ipis.
 - Allow selecting the idle routine by name via sysctl machdep.idle.  This
   replaces machdep.cpu_idle_hlt.  Only idle routines supported by the
   current machine are permitted.

Sponsored by:	Nokia

2 files changed, 16 insertions, 2 deletions

diff --git a/sys/powerpc/aim/machdep.c b/sys/powerpc/aim/machdep.c
index d407314..15decb7 100644
--- a/sys/powerpc/aim/machdep.c
+++ b/sys/powerpc/aim/machdep.c
@@ -730,7 +730,7 @@ cpu_halt(void)
 }
 
 void
-cpu_idle(void)
+cpu_idle(int busy)
 {
 	uint32_t msr;
 
@@ -750,6 +750,13 @@ cpu_idle(void)
 	}
 }
 
+int
+cpu_idle_wakeup(int cpu)
+{
+
+	return (0);
+}
+
 /*
  * Set set up registers on exec.
  */
diff --git a/sys/powerpc/booke/machdep.c b/sys/powerpc/booke/machdep.c
index 75e5cb6..132ce9c 100644
--- a/sys/powerpc/booke/machdep.c
+++ b/sys/powerpc/booke/machdep.c
@@ -696,7 +696,7 @@ freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
  * Set Wait state enable.
  */
 void
-cpu_idle (void)
+cpu_idle (int busy)
 {
 	register_t msr;
 
@@ -723,6 +723,13 @@ cpu_idle (void)
 #endif
 }
 
+int
+cpu_idle_wakeup(int cpu)
+{
+
+	return (0);
+}
+
 void
 spinlock_enter(void)
 {