projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 41c594ab RB |
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> | |
| 41c594ab RB |
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 | */ | |
| 30 | unsigned long selfipis[NR_CPUS]; | |
| 31 | ||
| 32 | struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; | |
| 33 | ||
| 34 | static struct proc_dir_entry *smtc_stats; | |
| 35 | ||
| 36 | atomic_t smtc_fpu_recoveries; | |
| 37 | ||
| 38 | static 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 | ||
| 79 | void 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 | } |