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
 43static 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
 76static void *c_start(struct seq_file *m, loff_t *pos)
 77{
 78	return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
 79}
 80static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 81{
 82	++*pos;
 83	return c_start(m, pos);
 84}
 85static void c_stop(struct seq_file *m, void *v)
 86{
 87}
 88const 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
 99static 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
110arch_initcall(proc_tile_init);
111
112/*
113 * Support /proc/sys/tile directory
114 */
115
116static 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
141static ctl_table unaligned_table[] = {
142	{
143		.procname	= "unaligned_fixup",
144		.mode		= 0555,
145		.child		= unaligned_subtable
146	},
147	{}
148};
149
150static struct ctl_path tile_path[] = {
151	{ .procname = "tile" },
152	{ }
153};
154
155static int __init proc_sys_tile_init(void)
156{
157	register_sysctl_paths(tile_path, unaligned_table);
158	return 0;
159}
160
161arch_initcall(proc_sys_tile_init);