2009-07-02 23:26:45 +08:00
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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2010-01-04 17:16:45 +08:00
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* Copyright (C) 2009 Lemote, Inc.
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2010-01-04 17:16:51 +08:00
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* Author: Zhangjin Wu, wuzhangjin@gmail.com
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2009-07-02 23:26:45 +08:00
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*/
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#include <linux/init.h>
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#include <linux/pm.h>
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#include <asm/reboot.h>
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#include <loongson.h>
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static void loongson_restart(char *command)
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{
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/* do preparation for reboot */
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mach_prepare_reboot();
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/* reboot via jumping to boot base address */
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2009-10-16 14:17:19 +08:00
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((void (*)(void))ioremap_nocache(LOONGSON_BOOT_BASE, 4)) ();
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2009-07-02 23:26:45 +08:00
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}
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MIPS: Loongson: Cleanup the halt and poweroff action
In the old source code, I have let halt and poweroff do the same action,
but in reality, they have different meanings.
As the manpage of shutdown shows:
-r Reboot after shutdown.
-H Halt action is to halt or drop into boot monitor on systems that support it.
-P Halt action is to turn off the power.
and in the real world, some machines(e.g. NAS) did not provide a power
button and the shutdown works as reset, so, we need to provide a
mechanism to let the users turn off the power safely without breaking
the system, such a mechanism is "halt", which only put the system into a
dead loop or a power-save mode and print some information to the screen
to tell the users to turn off the power safely.
$ shutdown -hH now /* loongson_halt, not turn off the power */
$ shutdown -hP now /* loongson_poweroff, work as poweroff */
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Tested-by: Liu Shiwei <liushiwei@gmail.com>
Cc: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/883/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-01-27 22:39:46 +08:00
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static void loongson_poweroff(void)
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2009-07-02 23:26:45 +08:00
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{
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mach_prepare_shutdown();
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2010-01-04 17:16:45 +08:00
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unreachable();
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2009-07-02 23:26:45 +08:00
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}
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MIPS: Loongson: Cleanup the halt and poweroff action
In the old source code, I have let halt and poweroff do the same action,
but in reality, they have different meanings.
As the manpage of shutdown shows:
-r Reboot after shutdown.
-H Halt action is to halt or drop into boot monitor on systems that support it.
-P Halt action is to turn off the power.
and in the real world, some machines(e.g. NAS) did not provide a power
button and the shutdown works as reset, so, we need to provide a
mechanism to let the users turn off the power safely without breaking
the system, such a mechanism is "halt", which only put the system into a
dead loop or a power-save mode and print some information to the screen
to tell the users to turn off the power safely.
$ shutdown -hH now /* loongson_halt, not turn off the power */
$ shutdown -hP now /* loongson_poweroff, work as poweroff */
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Tested-by: Liu Shiwei <liushiwei@gmail.com>
Cc: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/883/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-01-27 22:39:46 +08:00
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static void loongson_halt(void)
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{
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pr_notice("\n\n** You can safely turn off the power now **\n\n");
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while (1) {
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if (cpu_wait)
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cpu_wait();
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}
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}
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2009-07-02 23:26:45 +08:00
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static int __init mips_reboot_setup(void)
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{
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_machine_restart = loongson_restart;
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_machine_halt = loongson_halt;
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MIPS: Loongson: Cleanup the halt and poweroff action
In the old source code, I have let halt and poweroff do the same action,
but in reality, they have different meanings.
As the manpage of shutdown shows:
-r Reboot after shutdown.
-H Halt action is to halt or drop into boot monitor on systems that support it.
-P Halt action is to turn off the power.
and in the real world, some machines(e.g. NAS) did not provide a power
button and the shutdown works as reset, so, we need to provide a
mechanism to let the users turn off the power safely without breaking
the system, such a mechanism is "halt", which only put the system into a
dead loop or a power-save mode and print some information to the screen
to tell the users to turn off the power safely.
$ shutdown -hH now /* loongson_halt, not turn off the power */
$ shutdown -hP now /* loongson_poweroff, work as poweroff */
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Tested-by: Liu Shiwei <liushiwei@gmail.com>
Cc: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/883/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-01-27 22:39:46 +08:00
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pm_power_off = loongson_poweroff;
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2009-07-02 23:26:45 +08:00
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return 0;
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}
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arch_initcall(mips_reboot_setup);
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