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| author | Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> | 2008-03-27 11:38:31 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-04-01 20:43:07 +1100 |
| commit | ca052f7924141f34998ab440bb4d908dc021a46b (patch) | |
| tree | f84280e5932f214794afcbbe95d866eabcf0a3a7 /drivers/ps3/ps3-sys-manager.c | |
| parent | 5761eaa3a5ae3c7ea796add73b86176b7c963cca (diff) | |
| download | kernel_samsung_smdk4412-ca052f7924141f34998ab440bb4d908dc021a46b.tar.gz kernel_samsung_smdk4412-ca052f7924141f34998ab440bb4d908dc021a46b.tar.bz2 kernel_samsung_smdk4412-ca052f7924141f34998ab440bb4d908dc021a46b.zip | |
[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.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/ps3/ps3-sys-manager.c b/drivers/ps3/ps3-sys-manager.c index d4f6f960dd1..1260b01a536 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); } /** |