ca052f7924
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>
72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* PS3 System Manager core.
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*
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* Copyright (C) 2007 Sony Computer Entertainment Inc.
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* Copyright 2007 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <asm/lv1call.h>
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#include <asm/ps3.h>
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/**
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* Staticly linked routines that allow late binding of a loaded sys-manager
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* module.
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*/
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static struct ps3_sys_manager_ops ps3_sys_manager_ops;
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/**
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* ps3_register_sys_manager_ops - Bind ps3_sys_manager_ops to a module.
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* @ops: struct ps3_sys_manager_ops.
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*
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* To be called from ps3_sys_manager_probe() and ps3_sys_manager_remove() to
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* register call back ops for power control. Copies data to the static
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* variable ps3_sys_manager_ops.
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*/
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void ps3_sys_manager_register_ops(const struct ps3_sys_manager_ops *ops)
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{
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BUG_ON(!ops);
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BUG_ON(!ops->dev);
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ps3_sys_manager_ops = ops ? *ops : ps3_sys_manager_ops;
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}
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EXPORT_SYMBOL_GPL(ps3_sys_manager_register_ops);
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void ps3_sys_manager_power_off(void)
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{
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if (ps3_sys_manager_ops.power_off)
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ps3_sys_manager_ops.power_off(ps3_sys_manager_ops.dev);
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ps3_sys_manager_halt();
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}
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void ps3_sys_manager_restart(void)
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{
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if (ps3_sys_manager_ops.restart)
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ps3_sys_manager_ops.restart(ps3_sys_manager_ops.dev);
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ps3_sys_manager_halt();
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}
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void ps3_sys_manager_halt(void)
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{
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pr_emerg("System Halted, OK to turn off power\n");
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local_irq_disable();
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while (1)
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lv1_pause(1);
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}
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