Eric Lee / smarc-fsl-linux-kernel

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arch/mips/kernel/smtc-proc.c 2 KB
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41c594ab6   Ralf Baechle   [MIPS] MT: Improv... 
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  /*
   * /proc hooks for SMTC kernel
   * Copyright (C) 2005 Mips Technologies, Inc
   */
  
  #include <linux/kernel.h>
  #include <linux/sched.h>
  #include <linux/cpumask.h>
  #include <linux/interrupt.h>
  
  #include <asm/cpu.h>
  #include <asm/processor.h>
60063497a   Arun Sharma   atomic: use <linu... 
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  #include <linux/atomic.h>
41c594ab6   Ralf Baechle   [MIPS] MT: Improv... 
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  #include <asm/system.h>
  #include <asm/hardirq.h>
  #include <asm/mmu_context.h>
41c594ab6   Ralf Baechle   [MIPS] MT: Improv... 
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  #include <asm/mipsregs.h>
  #include <asm/cacheflush.h>
  #include <linux/proc_fs.h>
  
  #include <asm/smtc_proc.h>
  
  /*
   * /proc diagnostic and statistics hooks
   */
  
  /*
   * Statistics gathered
   */
  unsigned long selfipis[NR_CPUS];
  
  struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
  
  static struct proc_dir_entry *smtc_stats;
  
  atomic_t smtc_fpu_recoveries;
  
  static int proc_read_smtc(char *page, char **start, off_t off,
                            int count, int *eof, void *data)
  {
  	int totalen = 0;
  	int len;
  	int i;
  	extern unsigned long ebase;
  
  	len = sprintf(page, "SMTC Status Word: 0x%08x
  ", smtc_status);
  	totalen += len;
  	page += len;
  	len = sprintf(page, "Config7: 0x%08x
  ", read_c0_config7());
  	totalen += len;
  	page += len;
  	len = sprintf(page, "EBASE: 0x%08lx
  ", ebase);
  	totalen += len;
  	page += len;
  	len = sprintf(page, "Counter Interrupts taken per CPU (TC)
  ");
  	totalen += len;
  	page += len;
  	for (i=0; i < NR_CPUS; i++) {
  		len = sprintf(page, "%d: %ld
  ", i, smtc_cpu_stats[i].timerints);
  		totalen += len;
  		page += len;
  	}
  	len = sprintf(page, "Self-IPIs by CPU:
  ");
  	totalen += len;
  	page += len;
  	for(i = 0; i < NR_CPUS; i++) {
  		len = sprintf(page, "%d: %ld
  ", i, smtc_cpu_stats[i].selfipis);
  		totalen += len;
  		page += len;
  	}
  	len = sprintf(page, "%d Recoveries of \"stolen\" FPU
  ",
  	              atomic_read(&smtc_fpu_recoveries));
  	totalen += len;
  	page += len;
  
  	return totalen;
  }
  
  void init_smtc_stats(void)
  {
  	int i;
  
  	for (i=0; i<NR_CPUS; i++) {
  		smtc_cpu_stats[i].timerints = 0;
  		smtc_cpu_stats[i].selfipis = 0;
  	}
  
  	atomic_set(&smtc_fpu_recoveries, 0);
  
  	smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
  	                                    proc_read_smtc, NULL);
  }