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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>
#include <linux/atomic.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
#include <asm/mipsregs.h>
#include <asm/cacheflush.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.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];
atomic_t smtc_fpu_recoveries;
static int smtc_proc_show(struct seq_file *m, void *v)
{
int i;
extern unsigned long ebase;
seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status);
seq_printf(m, "Config7: 0x%08x\n", read_c0_config7());
seq_printf(m, "EBASE: 0x%08lx\n", ebase);
seq_printf(m, "Counter Interrupts taken per CPU (TC)\n");
for (i=0; i < NR_CPUS; i++)
seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
seq_printf(m, "Self-IPIs by CPU:\n");
for(i = 0; i < NR_CPUS; i++)
seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
seq_printf(m, "%d Recoveries of \"stolen\" FPU\n",
atomic_read(&smtc_fpu_recoveries));
return 0;
}
static int smtc_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, smtc_proc_show, NULL);
}
static const struct file_operations smtc_proc_fops = {
.open = smtc_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
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);
proc_create("smtc", 0444, NULL, &smtc_proc_fops);
}
static int proc_cpuinfo_chain_call(struct notifier_block *nfb,
unsigned long action_unused, void *data)
{
struct proc_cpuinfo_notifier_args *pcn = data;
struct seq_file *m = pcn->m;
unsigned long n = pcn->n;
if (!cpu_has_mipsmt)
return NOTIFY_OK;
seq_printf(m, "VPE\t\t\t: %d\n", cpu_data[n].vpe_id);
seq_printf(m, "TC\t\t\t: %d\n", cpu_data[n].tc_id);
return NOTIFY_OK;
}
static int __init proc_cpuinfo_notifier_init(void)
{
return proc_cpuinfo_notifier(proc_cpuinfo_chain_call, 0);
}
subsys_initcall(proc_cpuinfo_notifier_init);
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