1/* 2 * /proc hooks for SMTC kernel 3 * Copyright (C) 2005 Mips Technologies, Inc 4 */ 5 6#include <linux/kernel.h> 7#include <linux/sched.h> 8#include <linux/cpumask.h> 9#include <linux/interrupt.h> 10 11#include <asm/cpu.h> 12#include <asm/processor.h> 13#include <asm/atomic.h> 14#include <asm/system.h> 15#include <asm/hardirq.h> 16#include <asm/mmu_context.h> 17#include <asm/mipsregs.h> 18#include <asm/cacheflush.h> 19#include <linux/proc_fs.h> 20 21#include <asm/smtc_proc.h> 22 23/* 24 * /proc diagnostic and statistics hooks 25 */ 26 27/* 28 * Statistics gathered 29 */ 30unsigned long selfipis[NR_CPUS]; 31 32struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; 33 34static struct proc_dir_entry *smtc_stats; 35 36atomic_t smtc_fpu_recoveries; 37 38static int proc_read_smtc(char *page, char **start, off_t off, 39 int count, int *eof, void *data) 40{ 41 int totalen = 0; 42 int len; 43 int i; 44 extern unsigned long ebase; 45 46 len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status); 47 totalen += len; 48 page += len; 49 len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7()); 50 totalen += len; 51 page += len; 52 len = sprintf(page, "EBASE: 0x%08lx\n", ebase); 53 totalen += len; 54 page += len; 55 len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n"); 56 totalen += len; 57 page += len; 58 for (i=0; i < NR_CPUS; i++) { 59 len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); 60 totalen += len; 61 page += len; 62 } 63 len = sprintf(page, "Self-IPIs by CPU:\n"); 64 totalen += len; 65 page += len; 66 for(i = 0; i < NR_CPUS; i++) { 67 len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); 68 totalen += len; 69 page += len; 70 } 71 len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n", 72 atomic_read(&smtc_fpu_recoveries)); 73 totalen += len; 74 page += len; 75 76 return totalen; 77} 78 79void init_smtc_stats(void) 80{ 81 int i; 82 83 for (i=0; i<NR_CPUS; i++) { 84 smtc_cpu_stats[i].timerints = 0; 85 smtc_cpu_stats[i].selfipis = 0; 86 } 87 88 atomic_set(&smtc_fpu_recoveries, 0); 89 90 smtc_stats = create_proc_read_entry("smtc", 0444, NULL, 91 proc_read_smtc, NULL); 92} 93