• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
3  *
4  *   This program is free software; you can redistribute it and/or
5  *   modify it under the terms of the GNU General Public License
6  *   as published by the Free Software Foundation, version 2.
7  *
8  *   This program is distributed in the hope that it will be useful, but
9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11  *   NON INFRINGEMENT.  See the GNU General Public License for
12  *   more details.
13  */
14 
15 #include <linux/smp.h>
16 #include <linux/seq_file.h>
17 #include <linux/threads.h>
18 #include <linux/cpumask.h>
19 #include <linux/timex.h>
20 #include <linux/delay.h>
21 #include <linux/fs.h>
22 #include <linux/proc_fs.h>
23 #include <linux/sysctl.h>
24 #include <linux/hardirq.h>
25 #include <linux/hugetlb.h>
26 #include <linux/mman.h>
27 #include <asm/unaligned.h>
28 #include <asm/pgtable.h>
29 #include <asm/processor.h>
30 #include <asm/sections.h>
31 #include <asm/homecache.h>
32 #include <asm/hardwall.h>
33 #include <arch/chip.h>
34 
35 
36 /*
37  * Support /proc/cpuinfo
38  */
39 
40 #define cpu_to_ptr(n) ((void *)((long)(n)+1))
41 #define ptr_to_cpu(p) ((long)(p) - 1)
42 
show_cpuinfo(struct seq_file * m,void * v)43 static int show_cpuinfo(struct seq_file *m, void *v)
44 {
45 	int n = ptr_to_cpu(v);
46 
47 	if (n == 0) {
48 		char buf[NR_CPUS*5];
49 		cpulist_scnprintf(buf, sizeof(buf), cpu_online_mask);
50 		seq_printf(m, "cpu count\t: %d\n", num_online_cpus());
51 		seq_printf(m, "cpu list\t: %s\n", buf);
52 		seq_printf(m, "model name\t: %s\n", chip_model);
53 		seq_printf(m, "flags\t\t:\n");  /* nothing for now */
54 		seq_printf(m, "cpu MHz\t\t: %llu.%06llu\n",
55 			   get_clock_rate() / 1000000,
56 			   (get_clock_rate() % 1000000));
57 		seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
58 			   loops_per_jiffy/(500000/HZ),
59 			   (loops_per_jiffy/(5000/HZ)) % 100);
60 	}
61 
62 #ifdef CONFIG_SMP
63 	if (!cpu_online(n))
64 		return 0;
65 #endif
66 
67 	seq_printf(m, "processor\t: %d\n", n);
68 
69 	/* Print only num_online_cpus() blank lines total. */
70 	if (cpumask_next(n, cpu_online_mask) < nr_cpu_ids)
71 		seq_printf(m, "\n");
72 
73 	return 0;
74 }
75 
c_start(struct seq_file * m,loff_t * pos)76 static void *c_start(struct seq_file *m, loff_t *pos)
77 {
78 	return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
79 }
c_next(struct seq_file * m,void * v,loff_t * pos)80 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
81 {
82 	++*pos;
83 	return c_start(m, pos);
84 }
c_stop(struct seq_file * m,void * v)85 static void c_stop(struct seq_file *m, void *v)
86 {
87 }
88 const struct seq_operations cpuinfo_op = {
89 	.start	= c_start,
90 	.next	= c_next,
91 	.stop	= c_stop,
92 	.show	= show_cpuinfo,
93 };
94 
95 /*
96  * Support /proc/tile directory
97  */
98 
proc_tile_init(void)99 static int __init proc_tile_init(void)
100 {
101 	struct proc_dir_entry *root = proc_mkdir("tile", NULL);
102 	if (root == NULL)
103 		return 0;
104 
105 	proc_tile_hardwall_init(root);
106 
107 	return 0;
108 }
109 
110 arch_initcall(proc_tile_init);
111 
112 /*
113  * Support /proc/sys/tile directory
114  */
115 
116 static struct ctl_table unaligned_subtable[] = {
117 	{
118 		.procname	= "enabled",
119 		.data		= &unaligned_fixup,
120 		.maxlen		= sizeof(int),
121 		.mode		= 0644,
122 		.proc_handler	= &proc_dointvec
123 	},
124 	{
125 		.procname	= "printk",
126 		.data		= &unaligned_printk,
127 		.maxlen		= sizeof(int),
128 		.mode		= 0644,
129 		.proc_handler	= &proc_dointvec
130 	},
131 	{
132 		.procname	= "count",
133 		.data		= &unaligned_fixup_count,
134 		.maxlen		= sizeof(int),
135 		.mode		= 0644,
136 		.proc_handler	= &proc_dointvec
137 	},
138 	{}
139 };
140 
141 static struct ctl_table unaligned_table[] = {
142 	{
143 		.procname	= "unaligned_fixup",
144 		.mode		= 0555,
145 		.child		= unaligned_subtable
146 	},
147 	{}
148 };
149 
150 static struct ctl_path tile_path[] = {
151 	{ .procname = "tile" },
152 	{ }
153 };
154 
proc_sys_tile_init(void)155 static int __init proc_sys_tile_init(void)
156 {
157 	register_sysctl_paths(tile_path, unaligned_table);
158 	return 0;
159 }
160 
161 arch_initcall(proc_sys_tile_init);
162