[POWERPC] PS3: Save power in busy loops on halt

[linux-2.6-omap-h63xx.git] / drivers / ps3 / ps3-sys-manager.c

diff --git a/drivers/ps3/ps3-sys-manager.c b/drivers/ps3/ps3-sys-manager.c
index d4f6f960dd18d1ea22c52de06a20aed885b67612..1260b01a5361544e8a6257d66477687215eee0db 100644 (file)
--- a/drivers/ps3/ps3-sys-manager.c
+++ b/drivers/ps3/ps3-sys-manager.c
@@ -24,6 +24,7 @@
 #include <linux/reboot.h>
 
 #include <asm/firmware.h>
+#include <asm/lv1call.h>
 #include <asm/ps3.h>
 
 #include "vuart.h"
@@ -581,6 +582,23 @@ fail_id:
        return -EIO;
 }
 
+static void ps3_sys_manager_fin(struct ps3_system_bus_device *dev)
+{
+       ps3_sys_manager_send_request_shutdown(dev);
+
+       pr_emerg("System Halted, OK to turn off power\n");
+
+       while (ps3_sys_manager_handle_msg(dev)) {
+               /* pause until next DEC interrupt */
+               lv1_pause(0);
+       }
+
+       while (1) {
+               /* pause, ignoring DEC interrupt */
+               lv1_pause(1);
+       }
+}
+
 /**
  * ps3_sys_manager_final_power_off - The final platform machine_power_off routine.
  *
@@ -602,12 +620,8 @@ static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev)
 
        ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN,
                PS3_SM_WAKE_DEFAULT);
-       ps3_sys_manager_send_request_shutdown(dev);
-
-       pr_emerg("System Halted, OK to turn off power\n");
 
-       while (1)
-               ps3_sys_manager_handle_msg(dev);
+       ps3_sys_manager_fin(dev);
 }
 
 /**
@@ -639,12 +653,8 @@ static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev)
        ps3_sys_manager_send_attr(dev, 0);
        ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_REBOOT,
                PS3_SM_WAKE_DEFAULT);
-       ps3_sys_manager_send_request_shutdown(dev);
-
-       pr_emerg("System Halted, OK to turn off power\n");
 
-       while (1)
-               ps3_sys_manager_handle_msg(dev);
+       ps3_sys_manager_fin(dev);
 }
 
 /**