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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/sys-manager-core.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/sys-manager-core.c')
-rw-r--r--drivers/ps3/sys-manager-core.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/ps3/sys-manager-core.c b/drivers/ps3/sys-manager-core.c
index 31648f7d9ae1..474225852b63 100644
--- a/drivers/ps3/sys-manager-core.c
+++ b/drivers/ps3/sys-manager-core.c
@@ -19,6 +19,7 @@
*/
#include <linux/kernel.h>
+#include <asm/lv1call.h>
#include <asm/ps3.h>
/**
@@ -50,10 +51,7 @@ void ps3_sys_manager_power_off(void)
if (ps3_sys_manager_ops.power_off)
ps3_sys_manager_ops.power_off(ps3_sys_manager_ops.dev);
- printk(KERN_EMERG "System Halted, OK to turn off power\n");
- local_irq_disable();
- while (1)
- (void)0;
+ ps3_sys_manager_halt();
}
void ps3_sys_manager_restart(void)
@@ -61,8 +59,14 @@ void ps3_sys_manager_restart(void)
if (ps3_sys_manager_ops.restart)
ps3_sys_manager_ops.restart(ps3_sys_manager_ops.dev);
- printk(KERN_EMERG "System Halted, OK to turn off power\n");
+ ps3_sys_manager_halt();
+}
+
+void ps3_sys_manager_halt(void)
+{
+ pr_emerg("System Halted, OK to turn off power\n");
local_irq_disable();
while (1)
- (void)0;
+ lv1_pause(1);
}
+