1/*
 2 * This program is free software; you can redistribute  it and/or modify it
 3 * under  the terms of  the GNU General  Public License as published by the
 4 * Free Software Foundation;  either version 2 of the  License, or (at your
 5 * option) any later version.
 6 *
 7 * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
 8 * Author: Fuxin Zhang, zhangfx@lemote.com
 9 * Copyright (C) 2009 Lemote, Inc.
10 * Author: Zhangjin Wu, wuzhangjin@gmail.com
11 */
12#include <linux/init.h>
13#include <linux/pm.h>
14
15#include <asm/reboot.h>
16
17#include <loongson.h>
18
19static inline void loongson_reboot(void)
20{
21#ifndef CONFIG_CPU_JUMP_WORKAROUNDS
22	((void (*)(void))ioremap_nocache(LOONGSON_BOOT_BASE, 4)) ();
23#else
24	void (*func)(void);
25
26	func = (void *)ioremap_nocache(LOONGSON_BOOT_BASE, 4);
27
28	__asm__ __volatile__(
29	"       .set    noat                                            \n"
30	"       jr      %[func]                                         \n"
31	"       .set    at                                              \n"
32	: /* No outputs */
33	: [func] "r" (func));
34#endif
35}
36
37static void loongson_restart(char *command)
38{
39	/* do preparation for reboot */
40	mach_prepare_reboot();
41
42	/* reboot via jumping to boot base address */
43	loongson_reboot();
44}
45
46static void loongson_poweroff(void)
47{
48	mach_prepare_shutdown();
49	unreachable();
50}
51
52static void loongson_halt(void)
53{
54	pr_notice("\n\n** You can safely turn off the power now **\n\n");
55	while (1) {
56		if (cpu_wait)
57			cpu_wait();
58	}
59}
60
61static int __init mips_reboot_setup(void)
62{
63	_machine_restart = loongson_restart;
64	_machine_halt = loongson_halt;
65	pm_power_off = loongson_poweroff;
66
67	return 0;
68}
69
70arch_initcall(mips_reboot_setup);