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/arch.h>
26 #include <asm/sn/gda.h>
27 #include <asm/sn/sn0/hub.h>
28
29 void machine_restart(char *command) __noreturn;
30 void machine_halt(void) __noreturn;
31 void machine_power_off(void) __noreturn;
32
33 #define noreturn while(1); /* Silence gcc. */
34
35 /* XXX How to pass the reboot command to the firmware??? */
ip27_machine_restart(char * command)36 static 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
ip27_machine_halt(void)56 static 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
ip27_machine_power_off(void)70 static void ip27_machine_power_off(void)
71 {
72 /* To do ... */
73 noreturn;
74 }
75
ip27_reboot_setup(void)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
