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authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>2008-03-27 03:38:31 +0300
committerPaul Mackerras <paulus@samba.org>2008-04-01 13:43:07 +0400
commitca052f7924141f34998ab440bb4d908dc021a46b (patch)
treef84280e5932f214794afcbbe95d866eabcf0a3a7 /drivers/ps3/ps3-sys-manager.c
parent5761eaa3a5ae3c7ea796add73b86176b7c963cca (diff)
downloadlinux-ca052f7924141f34998ab440bb4d908dc021a46b.tar.xz
[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>
Diffstat (limited to 'drivers/ps3/ps3-sys-manager.c')
-rw-r--r--drivers/ps3/ps3-sys-manager.c30
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/ps3/ps3-sys-manager.c b/drivers/ps3/ps3-sys-manager.c
index d4f6f960dd18..1260b01a5361 100644
--- 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);
}
/**