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/smp.h> 18#include <asm/mipsregs.h> 19#include <asm/cacheflush.h> 20#include <linux/proc_fs.h> 21 22#include <asm/smtc_proc.h> 23 24/* 25 * /proc diagnostic and statistics hooks 26 */ 27 28/* 29 * Statistics gathered 30 */ 31unsigned long selfipis[NR_CPUS]; 32 33struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; 34 35static struct proc_dir_entry *smtc_stats; 36 37atomic_t smtc_fpu_recoveries; 38 39static int proc_read_smtc(char *page, char **start, off_t off, 40 int count, int *eof, void *data) 41{ 42 int totalen = 0; 43 int len; 44 int i; 45 extern unsigned long ebase; 46 47 len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status); 48 totalen += len; 49 page += len; 50 len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7()); 51 totalen += len; 52 page += len; 53 len = sprintf(page, "EBASE: 0x%08lx\n", ebase); 54 totalen += len; 55 page += len; 56 len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n"); 57 totalen += len; 58 page += len; 59 for (i=0; i < NR_CPUS; i++) { 60 len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); 61 totalen += len; 62 page += len; 63 } 64 len = sprintf(page, "Self-IPIs by CPU:\n"); 65 totalen += len; 66 page += len; 67 for(i = 0; i < NR_CPUS; i++) { 68 len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); 69 totalen += len; 70 page += len; 71 } 72 len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n", 73 atomic_read(&smtc_fpu_recoveries)); 74 totalen += len; 75 page += len; 76 77 return totalen; 78} 79 80void init_smtc_stats(void) 81{ 82 int i; 83 84 for (i=0; i<NR_CPUS; i++) { 85 smtc_cpu_stats[i].timerints = 0; 86 smtc_cpu_stats[i].selfipis = 0; 87 } 88 89 atomic_set(&smtc_fpu_recoveries, 0); 90 91 smtc_stats = create_proc_read_entry("smtc", 0444, NULL, 92 proc_read_smtc, NULL); 93} 94