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 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
18 #include <asm/io.h>
19 #include <asm/irq.h>
20 #include <asm/reboot.h>
21 #include <asm/system.h>
22 #include <asm/sgialib.h>
23 #include <asm/sn/addrs.h>
24 #include <asm/sn/arch.h>
25 #include <asm/sn/gda.h>
26 #include <asm/sn/sn0/hub.h>
27
28 void machine_restart(char *command) __attribute__((noreturn));
29 void machine_halt(void) __attribute__((noreturn));
30 void machine_power_off(void) __attribute__((noreturn));
31
32 #define noreturn while(1); /* Silence gcc. */
33
34 /* XXX How to pass the reboot command to the firmware??? */
ip27_machine_restart(char * command)35 static void ip27_machine_restart(char *command)
36 {
37 #if 0
38 int i;
39 #endif
40
41 printk("Reboot started from CPU %d\n", smp_processor_id());
42 #ifdef CONFIG_SMP
43 smp_send_stop();
44 #endif
45 #if 0
46 for (i = 0; i < numnodes; i++)
47 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
48 PROMOP_REBOOT);
49 #else
50 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
51 #endif
52 noreturn;
53 }
54
ip27_machine_halt(void)55 static void ip27_machine_halt(void)
56 {
57 int i;
58
59 #ifdef CONFIG_SMP
60 smp_send_stop();
61 #endif
62 for (i = 0; i < numnodes; i++)
63 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
64 PROMOP_RESTART);
65 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
66 noreturn;
67 }
68
ip27_machine_power_off(void)69 static void ip27_machine_power_off(void)
70 {
71 /* To do ... */
72 noreturn;
73 }
74
ip27_reboot_setup(void)75 void ip27_reboot_setup(void)
76 {
77 _machine_restart = ip27_machine_restart;
78 _machine_halt = ip27_machine_halt;
79 _machine_power_off = ip27_machine_power_off;
80 }
81