/* * /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); }