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

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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>
This commit is contained in:
Geert Uytterhoeven
2008-03-27 11:38:31 +11:00
committed by Paul Mackerras
parent 5761eaa3a5
commit ca052f7924
4 changed files with 44 additions and 19 deletions
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12
arch/powerpc/platforms/ps3/setup.c
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@@ -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,