arch/tile/kernel/proc.c

   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
  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                 seq_printf(m, "cpu count\t: %d\n", num_online_cpus());
  49                 seq_printf(m, "cpu list\t: %*pbl\n",
  50                            cpumask_pr_args(cpu_online_mask));
  51                 seq_printf(m, "model name\t: %s\n", chip_model);
  52                 seq_printf(m, "flags\t\t:\n");  /* nothing for now */
  53                 seq_printf(m, "cpu MHz\t\t: %llu.%06llu\n",
  54                            get_clock_rate() / 1000000,
  55                            (get_clock_rate() % 1000000));
  56                 seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
  57                            loops_per_jiffy/(500000/HZ),
  58                            (loops_per_jiffy/(5000/HZ)) % 100);
  59         }
  60
  61 #ifdef CONFIG_SMP
  62         if (!cpu_online(n))
  63                 return 0;
  64 #endif
  65
  66         seq_printf(m, "processor\t: %d\n", n);
  67
  68         /* Print only num_online_cpus() blank lines total. */
  69         if (cpumask_next(n, cpu_online_mask) < nr_cpu_ids)
  70                 seq_printf(m, "\n");
  71
  72         return 0;
  73 }
  74
  75 static void *c_start(struct seq_file *m, loff_t *pos)
  76 {
  77         return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
  78 }
  79 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
  80 {
  81         ++*pos;
  82         return c_start(m, pos);
  83 }
  84 static void c_stop(struct seq_file *m, void *v)
  85 {
  86 }
  87 const struct seq_operations cpuinfo_op = {
  88         .start  = c_start,
  89         .next   = c_next,
  90         .stop   = c_stop,
  91         .show   = show_cpuinfo,
  92 };
  93
  94 /*
  95  * Support /proc/tile directory
  96  */
  97
  98 static int __init proc_tile_init(void)
  99 {
 100         struct proc_dir_entry *root = proc_mkdir("tile", NULL);
 101         if (root == NULL)
 102                 return 0;
 103
 104         proc_tile_hardwall_init(root);
 105
 106         return 0;
 107 }
 108
 109 arch_initcall(proc_tile_init);
 110
 111 /*
 112  * Support /proc/sys/tile directory
 113  */
 114
 115 static struct 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
 140 static struct ctl_table unaligned_table[] = {
 141         {
 142                 .procname       = "unaligned_fixup",
 143                 .mode           = 0555,
 144                 .child          = unaligned_subtable
 145         },
 146         {}
 147 };
 148
 149 static struct ctl_path tile_path[] = {
 150         { .procname = "tile" },
 151         { }
 152 };
 153
 154 static int __init proc_sys_tile_init(void)
 155 {
 156         register_sysctl_paths(tile_path, unaligned_table);
 157         return 0;
 158 }
 159
 160 arch_initcall(proc_sys_tile_init);