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/compiler.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/sgialib.h>
24 #include <asm/sn/addrs.h>
25 #include <asm/sn/agent.h>
26 #include <asm/sn/arch.h>
27 #include <asm/sn/gda.h>
28
29 #include "ip27-common.h"
30
31 void machine_restart(char *command) __noreturn;
32 void machine_halt(void) __noreturn;
33 void machine_power_off(void) __noreturn;
34
35 #define noreturn while(1); /* Silence gcc. */
36
37 /* XXX How to pass the reboot command to the firmware??? */
38 static void ip27_machine_restart(char *command)
39 {
40 #if 0
41 int i;
42 #endif
43
44 printk("Reboot started from CPU %d\n", smp_processor_id());
45 #ifdef CONFIG_SMP
46 smp_send_stop();
47 #endif
48 #if 0
49 for_each_online_node(i)
50 REMOTE_HUB_S(i, PROMOP_REG, 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(i, PROMOP_REG, PROMOP_RESTART);
66 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
67 noreturn;
68 }
69
70 static void ip27_machine_power_off(void)
71 {
72 /* To do ... */
73 noreturn;
74 }
75
76 void ip27_reboot_setup(void)
77 {
78 _machine_restart = ip27_machine_restart;
79 _machine_halt = ip27_machine_halt;
80 pm_power_off = ip27_machine_power_off;
81 }
82
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