diff options
Diffstat (limited to 'arch/mips/momentum/ocelot_c/reset.c')
-rw-r--r-- | arch/mips/momentum/ocelot_c/reset.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/momentum/ocelot_c/reset.c b/arch/mips/momentum/ocelot_c/reset.c new file mode 100644 index 000000000000..1f2b4263cc8c --- /dev/null +++ b/arch/mips/momentum/ocelot_c/reset.c | |||
@@ -0,0 +1,59 @@ | |||
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) 1997, 2001 Ralf Baechle | ||
8 | * Copyright 2001 MontaVista Software Inc. | ||
9 | * Author: jsun@mvista.com or jsun@junsun.net | ||
10 | * | ||
11 | * Copyright (C) 2002 Momentum Computer Inc. | ||
12 | * Author: Matthew Dharm <mdharm@momenco.com> | ||
13 | * | ||
14 | * Louis Hamilton, Red Hat, Inc. | ||
15 | * hamilton@redhat.com [MIPS64 modifications] | ||
16 | */ | ||
17 | #include <linux/config.h> | ||
18 | #include <linux/sched.h> | ||
19 | #include <linux/mm.h> | ||
20 | #include <asm/io.h> | ||
21 | #include <asm/pgtable.h> | ||
22 | #include <asm/processor.h> | ||
23 | #include <asm/reboot.h> | ||
24 | #include <asm/system.h> | ||
25 | #include <linux/delay.h> | ||
26 | |||
27 | void momenco_ocelot_restart(char *command) | ||
28 | { | ||
29 | /* base address of timekeeper portion of part */ | ||
30 | void *nvram = (void *) | ||
31 | #ifdef CONFIG_MIPS64 | ||
32 | 0xfffffffffc807000; | ||
33 | #else | ||
34 | 0xfc807000; | ||
35 | #endif | ||
36 | |||
37 | /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */ | ||
38 | writeb(0x84, nvram + 0xff7); | ||
39 | |||
40 | /* wait for the watchdog to go off */ | ||
41 | mdelay(100+(1000/16)); | ||
42 | |||
43 | /* if the watchdog fails for some reason, let people know */ | ||
44 | printk(KERN_NOTICE "Watchdog reset failed\n"); | ||
45 | } | ||
46 | |||
47 | void momenco_ocelot_halt(void) | ||
48 | { | ||
49 | printk(KERN_NOTICE "\n** You can safely turn off the power\n"); | ||
50 | while (1) | ||
51 | __asm__(".set\tmips3\n\t" | ||
52 | "wait\n\t" | ||
53 | ".set\tmips0"); | ||
54 | } | ||
55 | |||
56 | void momenco_ocelot_power_off(void) | ||
57 | { | ||
58 | momenco_ocelot_halt(); | ||
59 | } | ||