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);