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1 /* -*- mode: c; c-basic-offset: 8 -*- */ 1
2
3 /* Copyright (C) 2001
4 *
5 * Author: J.E.J.Bottomley@HansenPartnership.c
6 *
7 * linux/arch/i386/kernel/voyager_thread.c
8 *
9 * This module provides the machine status mon
10 * voyager architecture. This allows us to mo
11 * environment (temp, voltage, fan function) a
12 * internal UPS. If a fault is detected, this
13 * action (usually just informing init)
14 * */
15
16 #include <linux/module.h>
17 #include <linux/config.h>
18 #include <linux/mm.h>
19 #include <linux/kernel_stat.h>
20 #include <linux/delay.h>
21 #include <linux/mc146818rtc.h>
22 #include <linux/smp_lock.h>
23 #include <linux/init.h>
24 #include <linux/bootmem.h>
25 #include <linux/kmod.h>
26 #include <linux/completion.h>
27 #include <linux/sched.h>
28 #include <asm/desc.h>
29 #include <asm/voyager.h>
30 #include <asm/vic.h>
31 #include <asm/mtrr.h>
32 #include <asm/msr.h>
33
34 #include <linux/irq.h>
35
36 #define THREAD_NAME "kvoyagerd"
37
38 /* external variables */
39 int kvoyagerd_running = 0;
40 DECLARE_MUTEX_LOCKED(kvoyagerd_sem);
41
42 static int thread(void *);
43
44 static __u8 set_timeout = 0;
45
46 /* Start the machine monitor thread. Return 1
47 static int __init
48 voyager_thread_start(void)
49 {
50 if(kernel_thread(thread, NULL, CLONE_K
51 /* This is serious, but not fa
52 printk(KERN_ERR "Voyager: Fail
53 return 1;
54 }
55 return 0;
56 }
57
58 static int
59 execute(const char *string)
60 {
61 int ret;
62
63 char *envp[] = {
64 "HOME=/",
65 "TERM=linux",
66 "PATH=/sbin:/usr/sbin:/bin:/us
67 NULL,
68 };
69 char *argv[] = {
70 "/bin/bash",
71 "-c",
72 (char *)string,
73 NULL,
74 };
75
76 if ((ret = call_usermodehelper(argv[0]
77 printk(KERN_ERR "Voyager faile
78 string, ret);
79 }
80 return ret;
81 }
82
83 static void
84 check_from_kernel(void)
85 {
86 if(voyager_status.switch_off) {
87
88 /* FIXME: This should be confi
89 execute("umask 600; echo 0 > /
90 } else if(voyager_status.power_fail) {
91 VDEBUG(("Voyager daemon detect
92
93 /* FIXME: This should be confi
94 execute("umask 600; echo F > /
95 set_timeout = 1;
96 }
97 }
98
99 static void
100 check_continuing_condition(void)
101 {
102 if(voyager_status.power_fail) {
103 __u8 data;
104 voyager_cat_psi(VOYAGER_PSI_SU
105 VOYAGER_PSI_AC
106 if((data & 0x1f) == 0) {
107 /* all power restored
108 printk(KERN_NOTICE "VO
109 /* FIXME: should be us
110 execute("umask 600; ec
111 set_timeout = 0;
112 }
113 }
114 }
115
116 static void
117 wakeup(unsigned long unused)
118 {
119 up(&kvoyagerd_sem);
120 }
121
122 static int
123 thread(void *unused)
124 {
125 struct timer_list wakeup_timer;
126
127 kvoyagerd_running = 1;
128
129 reparent_to_init();
130 daemonize(THREAD_NAME);
131
132 set_timeout = 0;
133
134 init_timer(&wakeup_timer);
135
136 sigfillset(¤t->blocked);
137 current->signal->tty = NULL;
138
139 printk(KERN_NOTICE "Voyager starting m
140
141 for(;;) {
142 down_interruptible(&kvoyagerd_
143 VDEBUG(("Voyager Daemon awoken
144 if(voyager_status.request_from
145 /* probably awoken fro
146 check_continuing_condi
147 } else {
148 check_from_kernel();
149 voyager_status.request
150 }
151 if(set_timeout) {
152 del_timer(&wakeup_time
153 wakeup_timer.expires =
154 wakeup_timer.function
155 add_timer(&wakeup_time
156 }
157 }
158 }
159
160 static void __exit
161 voyager_thread_stop(void)
162 {
163 /* FIXME: do nothing at the moment */
164 }
165
166 module_init(voyager_thread_start);
167 //module_exit(voyager_thread_stop);
168
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