From ca052f7924141f34998ab440bb4d908dc021a46b Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 27 Mar 2008 11:38:31 +1100 Subject: [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 Signed-off-by: Geoff Levand Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/ps3/setup.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/platforms/ps3/setup.c') diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c index 5c2cbb08eb5..c144669a0d3 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, -- cgit v1.2.3