LXR linux/arch/mips/kernel/smtc-proc.c

   1/*
   2 * /proc hooks for SMTC kernel
   3 * Copyright (C) 2005 Mips Technologies, Inc
   4 */
   5
   6#include <linux/kernel.h>
   7#include <linux/sched.h>
   8#include <linux/cpumask.h>
   9#include <linux/interrupt.h>
  10
  11#include <asm/cpu.h>
  12#include <asm/processor.h>
  13#include <linux/atomic.h>
  14#include <asm/hardirq.h>
  15#include <asm/mmu_context.h>
  16#include <asm/mipsregs.h>
  17#include <asm/cacheflush.h>
  18#include <linux/proc_fs.h>
  19#include <linux/seq_file.h>
  20
  21#include <asm/smtc_proc.h>
  22
  23/*
  24 * /proc diagnostic and statistics hooks
  25 */
  26
  27/*
  28 * Statistics gathered
  29 */
  30unsigned long selfipis[NR_CPUS];
  31
  32struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
  33
  34atomic_t smtc_fpu_recoveries;
  35
  36static int smtc_proc_show(struct seq_file *m, void *v)
  37{
  38        int i;
  39        extern unsigned long ebase;
  40
  41        seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status);
  42        seq_printf(m, "Config7: 0x%08x\n", read_c0_config7());
  43        seq_printf(m, "EBASE: 0x%08lx\n", ebase);
  44        seq_printf(m, "Counter Interrupts taken per CPU (TC)\n");
  45        for (i=0; i < NR_CPUS; i++)
  46                seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
  47        seq_printf(m, "Self-IPIs by CPU:\n");
  48        for(i = 0; i < NR_CPUS; i++)
  49                seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
  50        seq_printf(m, "%d Recoveries of \"stolen\" FPU\n",
  51                   atomic_read(&smtc_fpu_recoveries));
  52        return 0;
  53}
  54
  55static int smtc_proc_open(struct inode *inode, struct file *file)
  56{
  57        return single_open(file, smtc_proc_show, NULL);
  58}
  59
  60static const struct file_operations smtc_proc_fops = {
  61        .open           = smtc_proc_open,
  62        .read           = seq_read,
  63        .llseek         = seq_lseek,
  64        .release        = single_release,
  65};
  66
  67void init_smtc_stats(void)
  68{
  69        int i;
  70
  71        for (i=0; i<NR_CPUS; i++) {
  72                smtc_cpu_stats[i].timerints = 0;
  73                smtc_cpu_stats[i].selfipis = 0;
  74        }
  75
  76        atomic_set(&smtc_fpu_recoveries, 0);
  77
  78        proc_create("smtc", 0444, NULL, &smtc_proc_fops);
  79}
  80