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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);
- }
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