Pull sem2mutex-ioc4 into release branch
[pandora-kernel.git] / arch / mips / sgi-ip27 / ip27-reset.c
1 /*
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  *
8  * Copyright (C) 1997, 1998, 1999, 2000, 06 by Ralf Baechle
9  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
10  */
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/timer.h>
15 #include <linux/smp.h>
16 #include <linux/mmzone.h>
17 #include <linux/nodemask.h>
18 #include <linux/pm.h>
19
20 #include <asm/io.h>
21 #include <asm/irq.h>
22 #include <asm/reboot.h>
23 #include <asm/system.h>
24 #include <asm/sgialib.h>
25 #include <asm/sn/addrs.h>
26 #include <asm/sn/arch.h>
27 #include <asm/sn/gda.h>
28 #include <asm/sn/sn0/hub.h>
29
30 void machine_restart(char *command) __attribute__((noreturn));
31 void machine_halt(void) __attribute__((noreturn));
32 void machine_power_off(void) __attribute__((noreturn));
33
34 #define noreturn while(1);                              /* Silence gcc.  */
35
36 /* XXX How to pass the reboot command to the firmware??? */
37 static void ip27_machine_restart(char *command)
38 {
39 #if 0
40         int i;
41 #endif
42
43         printk("Reboot started from CPU %d\n", smp_processor_id());
44 #ifdef CONFIG_SMP
45         smp_send_stop();
46 #endif
47 #if 0
48         for_each_online_node(i)
49                 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
50                                                         PROMOP_REBOOT);
51 #else
52         LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
53 #endif
54         noreturn;
55 }
56
57 static void ip27_machine_halt(void)
58 {
59         int i;
60
61 #ifdef CONFIG_SMP
62         smp_send_stop();
63 #endif
64         for_each_online_node(i)
65                 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
66                                                         PROMOP_RESTART);
67         LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
68         noreturn;
69 }
70
71 static void ip27_machine_power_off(void)
72 {
73         /* To do ...  */
74         noreturn;
75 }
76
77 void ip27_reboot_setup(void)
78 {
79         _machine_restart = ip27_machine_restart;
80         _machine_halt = ip27_machine_halt;
81         pm_power_off = ip27_machine_power_off;
82 }