[POWERPC] PS3: Save power in busy loops on halt
PS3 save power on halt:
- Replace infinite busy loops by smarter loops calling
lv1_pause() to save power.
- Add ps3_halt() and ps3_sys_manager_halt().
- Add __noreturn annotations.
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
index 5c2cbb0..c144669 100644
--- a/arch/powerpc/platforms/ps3/setup.c
+++ b/arch/powerpc/platforms/ps3/setup.c
@@ -95,6 +95,14 @@
ps3_sys_manager_power_off(); /* never returns */
}
+static void ps3_halt(void)
+{
+ DBG("%s:%d\n", __func__, __LINE__);
+
+ smp_send_stop();
+ ps3_sys_manager_halt(); /* never returns */
+}
+
static void ps3_panic(char *str)
{
DBG("%s:%d %s\n", __func__, __LINE__, str);
@@ -105,7 +113,8 @@
printk(" Please press POWER button.\n");
printk("\n");
- while(1);
+ while(1)
+ lv1_pause(1);
}
#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
@@ -266,6 +275,7 @@
.progress = ps3_progress,
.restart = ps3_restart,
.power_off = ps3_power_off,
+ .halt = ps3_halt,
#if defined(CONFIG_KEXEC)
.kexec_cpu_down = ps3_kexec_cpu_down,
.machine_kexec = default_machine_kexec,