Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * /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>

#include <asm/atomic.h>

#include <asm/system.h>

#include <asm/hardirq.h>

#include <asm/mmu_context.h>

#include <asm/smp.h>

#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\n", smtc_status);

        totalen += len;

        page += len;

        len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());

        totalen += len;

        page += len;

        len = sprintf(page, "EBASE: 0x%08lx\n", ebase);

        totalen += len;

        page += len;

        len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");

        totalen += len;

        page += len;

        for (i=0; i < NR_CPUS; i++) {

                len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);

                totalen += len;

                page += len;

        }

        len = sprintf(page, "Self-IPIs by CPU:\n");

        totalen += len;

        page += len;

        for(i = 0; i < NR_CPUS; i++) {

                len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);

                totalen += len;

                page += len;

        }

        len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",

                      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);

}