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authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>2008-03-27 11:38:31 +1100
committerPaul Mackerras <paulus@samba.org>2008-04-01 20:43:07 +1100
commitca052f7924141f34998ab440bb4d908dc021a46b (patch)
treef84280e5932f214794afcbbe95d866eabcf0a3a7 /arch
parent5761eaa3a5ae3c7ea796add73b86176b7c963cca (diff)
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[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 'arch')
-rw-r--r--arch/powerpc/platforms/ps3/setup.c12
1 files changed, 11 insertions, 1 deletions
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 @@ static void ps3_power_off(void)
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 @@ static void ps3_panic(char *str)
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 @@ define_machine(ps3) {
.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,