MFcalloutng:

When CPU becomes idle, cpu_idleclock() calculates time to the next timer
event in order to reprogram hw timer. Return that time in sbintime_t to
the caller and pass it to acpi_cpu_idle(), where it can be used as one
more factor (quite precise) to extimate furter sleep time and choose
optimal sleep state. This is a preparatory change for further callout
improvements will be committed in the next days.

The commmit is not targeted for MFC.

3 files changed, 12 insertions, 11 deletions

diff --git a/sys/powerpc/powerpc/cpu.c b/sys/powerpc/powerpc/cpu.c
index d177c8b..d67f359 100644
--- a/sys/powerpc/powerpc/cpu.c
+++ b/sys/powerpc/powerpc/cpu.c
@@ -79,9 +79,9 @@ static void	cpu_970_setup(int cpuid, uint16_t vers);
 static void	cpu_booke_setup(int cpuid, uint16_t vers);
 
 int powerpc_pow_enabled;
-void (*cpu_idle_hook)(void) = NULL;
-static void	cpu_idle_60x(void);
-static void	cpu_idle_booke(void);
+void (*cpu_idle_hook)(sbintime_t) = NULL;
+static void	cpu_idle_60x(sbintime_t);
+static void	cpu_idle_booke(sbintime_t);
 
 struct cputab {
 	const char	*name;
@@ -516,6 +516,7 @@ cpu_feature_bit(SYSCTL_HANDLER_ARGS)
 void
 cpu_idle(int busy)
 {
+	sbintime_t sbt = -1;
 
 #ifdef INVARIANTS
 	if ((mfmsr() & PSL_EE) != PSL_EE) {
@@ -531,9 +532,9 @@ cpu_idle(int busy)
 	if (cpu_idle_hook != NULL) {
 		if (!busy) {
 			critical_enter();
-			cpu_idleclock();
+			sbt = cpu_idleclock();
 		}
-		cpu_idle_hook();
+		cpu_idle_hook(sbt);
 		if (!busy) {
 			cpu_activeclock();
 			critical_exit();
@@ -551,7 +552,7 @@ cpu_idle_wakeup(int cpu)
 }
 
 static void
-cpu_idle_60x(void)
+cpu_idle_60x(sbintime_t sbt)
 {
 	register_t msr;
 	uint16_t vers;
@@ -586,7 +587,7 @@ cpu_idle_60x(void)
 }
 
 static void
-cpu_idle_booke(void)
+cpu_idle_booke(sbintime_t sbt)
 {
 	register_t msr;
 
diff --git a/sys/powerpc/ps3/platform_ps3.c b/sys/powerpc/ps3/platform_ps3.c
index 61ce873..207382d 100644
--- a/sys/powerpc/ps3/platform_ps3.c
+++ b/sys/powerpc/ps3/platform_ps3.c
@@ -70,7 +70,7 @@ static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
 static struct cpu_group *ps3_smp_topo(platform_t);
 #endif
 static void ps3_reset(platform_t);
-static void ps3_cpu_idle(void);
+static void ps3_cpu_idle(sbintime_t);
 
 static platform_method_t ps3_methods[] = {
 	PLATFORMMETHOD(platform_probe, 		ps3_probe),
@@ -245,7 +245,7 @@ ps3_real_maxaddr(platform_t plat)
 }
 
 static void
-ps3_cpu_idle(void)
+ps3_cpu_idle(sbintime_t sbt)
 {
 	lv1_pause(0);
 }
diff --git a/sys/powerpc/wii/platform_wii.c b/sys/powerpc/wii/platform_wii.c
index 2bb6022..bc35105 100644
--- a/sys/powerpc/wii/platform_wii.c
+++ b/sys/powerpc/wii/platform_wii.c
@@ -60,7 +60,7 @@ static void		wii_mem_regions(platform_t, struct mem_region **,
 			    int *, struct mem_region **, int *);
 static unsigned long	wii_timebase_freq(platform_t, struct cpuref *cpuref);
 static void		wii_reset(platform_t);
-static void		wii_cpu_idle(void);
+static void		wii_cpu_idle(sbintime_t sbt);
 
 static platform_method_t wii_methods[] = {
 	PLATFORMMETHOD(platform_probe,		wii_probe),
@@ -155,6 +155,6 @@ wii_reset(platform_t plat)
 }
 
 static void
-wii_cpu_idle(void)
+wii_cpu_idle(sbintime_t sbt)
 {
 }