tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/mman.h>
26#include <asm/pgtable.h>
27#include <asm/processor.h>
28#include <asm/sections.h>
29#include <asm/homecache.h>
30#include <asm/hardwall.h>
31#include <arch/chip.h>
32
33
34/*
35 * Support /proc/cpuinfo
36 */
37
38#define cpu_to_ptr(n) ((void *)((long)(n)+1))
39#define ptr_to_cpu(p) ((long)(p) - 1)
40
41static int show_cpuinfo(struct seq_file *m, void *v)
42{
43 int n = ptr_to_cpu(v);
44
45 if (n == 0) {
46 char buf[NR_CPUS*5];
47 cpulist_scnprintf(buf, sizeof(buf), cpu_online_mask);
48 seq_printf(m, "cpu count\t: %d\n", num_online_cpus());
49 seq_printf(m, "cpu list\t: %s\n", buf);
50 seq_printf(m, "model name\t: %s\n", chip_model);
51 seq_printf(m, "flags\t\t:\n"); /* nothing for now */
52 seq_printf(m, "cpu MHz\t\t: %llu.%06llu\n",
53 get_clock_rate() / 1000000,
54 (get_clock_rate() % 1000000));
55 seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
56 loops_per_jiffy/(500000/HZ),
57 (loops_per_jiffy/(5000/HZ)) % 100);
58 }
59
60#ifdef CONFIG_SMP
61 if (!cpu_online(n))
62 return 0;
63#endif
64
65 seq_printf(m, "processor\t: %d\n", n);
66
67 /* Print only num_online_cpus() blank lines total. */
68 if (cpumask_next(n, cpu_online_mask) < nr_cpu_ids)
69 seq_printf(m, "\n");
70
71 return 0;
72}
73
74static void *c_start(struct seq_file *m, loff_t *pos)
75{
76 return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
77}
78static void *c_next(struct seq_file *m, void *v, loff_t *pos)
79{
80 ++*pos;
81 return c_start(m, pos);
82}
83static void c_stop(struct seq_file *m, void *v)
84{
85}
86const struct seq_operations cpuinfo_op = {
87 .start = c_start,
88 .next = c_next,
89 .stop = c_stop,
90 .show = show_cpuinfo,
91};
92
93/*
94 * Support /proc/tile directory
95 */
96
97static int __init proc_tile_init(void)
98{
99 struct proc_dir_entry *root = proc_mkdir("tile", NULL);
100 if (root == NULL)
101 return 0;
102
103 proc_tile_hardwall_init(root);
104
105 return 0;
106}
107
108arch_initcall(proc_tile_init);
109
110/*
111 * Support /proc/sys/tile directory
112 */
113
114#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */
115static ctl_table unaligned_subtable[] = {
116 {
117 .procname = "enabled",
118 .data = &unaligned_fixup,
119 .maxlen = sizeof(int),
120 .mode = 0644,
121 .proc_handler = &proc_dointvec
122 },
123 {
124 .procname = "printk",
125 .data = &unaligned_printk,
126 .maxlen = sizeof(int),
127 .mode = 0644,
128 .proc_handler = &proc_dointvec
129 },
130 {
131 .procname = "count",
132 .data = &unaligned_fixup_count,
133 .maxlen = sizeof(int),
134 .mode = 0644,
135 .proc_handler = &proc_dointvec
136 },
137 {}
138};
139
140static ctl_table unaligned_table[] = {
141 {
142 .procname = "unaligned_fixup",
143 .mode = 0555,
144 .child = unaligned_subtable
145 },
146 {}
147};
148#endif
149
150static struct ctl_path tile_path[] = {
151 { .procname = "tile" },
152 { }
153};
154
155static int __init proc_sys_tile_init(void)
156{
157#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */
158 register_sysctl_paths(tile_path, unaligned_table);
159#endif
160 return 0;
161}
162
163arch_initcall(proc_sys_tile_init);