blob: c17076108d47974f21fd9a89d40b461d9389806c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Reset an IP27.
7 *
Ralf Baechlefcdb27a2006-01-18 17:37:07 +00008 * Copyright (C) 1997, 1998, 1999, 2000, 06 by Ralf Baechle
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
10 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/timer.h>
14#include <linux/smp.h>
15#include <linux/mmzone.h>
16#include <linux/nodemask.h>
Ralf Baechlefcdb27a2006-01-18 17:37:07 +000017#include <linux/pm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#include <asm/io.h>
20#include <asm/irq.h>
21#include <asm/reboot.h>
22#include <asm/system.h>
23#include <asm/sgialib.h>
24#include <asm/sn/addrs.h>
25#include <asm/sn/arch.h>
26#include <asm/sn/gda.h>
27#include <asm/sn/sn0/hub.h>
28
29void machine_restart(char *command) __attribute__((noreturn));
30void machine_halt(void) __attribute__((noreturn));
31void machine_power_off(void) __attribute__((noreturn));
32
33#define noreturn while(1); /* Silence gcc. */
34
35/* XXX How to pass the reboot command to the firmware??? */
36static void ip27_machine_restart(char *command)
37{
38#if 0
39 int i;
40#endif
41
42 printk("Reboot started from CPU %d\n", smp_processor_id());
43#ifdef CONFIG_SMP
44 smp_send_stop();
45#endif
46#if 0
47 for_each_online_node(i)
48 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
49 PROMOP_REBOOT);
50#else
51 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
52#endif
53 noreturn;
54}
55
56static void ip27_machine_halt(void)
57{
58 int i;
59
60#ifdef CONFIG_SMP
61 smp_send_stop();
62#endif
63 for_each_online_node(i)
64 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
65 PROMOP_RESTART);
66 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
67 noreturn;
68}
69
70static void ip27_machine_power_off(void)
71{
72 /* To do ... */
73 noreturn;
74}
75
76void ip27_reboot_setup(void)
77{
78 _machine_restart = ip27_machine_restart;
79 _machine_halt = ip27_machine_halt;
Ralf Baechlefcdb27a2006-01-18 17:37:07 +000080 pm_power_off = ip27_machine_power_off;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}