1/* 2 * Copyright (C) 2001 Kyle A. Lucke IBM Corporation 3 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19#include <linux/init.h> 20#include <linux/proc_fs.h> 21#include <linux/seq_file.h> 22#include <linux/param.h> /* for HZ */ 23#include <asm/paca.h> 24#include <asm/processor.h> 25#include <asm/time.h> 26#include <asm/lppaca.h> 27#include <asm/firmware.h> 28#include <asm/iseries/hv_call_xm.h> 29 30#include "processor_vpd.h" 31#include "main_store.h" 32 33static int __init iseries_proc_create(void) 34{ 35 struct proc_dir_entry *e; 36 37 if (!firmware_has_feature(FW_FEATURE_ISERIES)) 38 return 0; 39 40 e = proc_mkdir("iSeries", 0); 41 if (!e) 42 return 1; 43 44 return 0; 45} 46core_initcall(iseries_proc_create); 47 48static unsigned long startTitan = 0; 49static unsigned long startTb = 0; 50 51static int proc_titantod_show(struct seq_file *m, void *v) 52{ 53 unsigned long tb0, titan_tod; 54 55 tb0 = get_tb(); 56 titan_tod = HvCallXm_loadTod(); 57 58 seq_printf(m, "Titan\n" ); 59 seq_printf(m, " time base = %016lx\n", tb0); 60 seq_printf(m, " titan tod = %016lx\n", titan_tod); 61 seq_printf(m, " xProcFreq = %016x\n", 62 xIoHriProcessorVpd[0].xProcFreq); 63 seq_printf(m, " xTimeBaseFreq = %016x\n", 64 xIoHriProcessorVpd[0].xTimeBaseFreq); 65 seq_printf(m, " tb_ticks_per_jiffy = %lu\n", tb_ticks_per_jiffy); 66 seq_printf(m, " tb_ticks_per_usec = %lu\n", tb_ticks_per_usec); 67 68 if (!startTitan) { 69 startTitan = titan_tod; 70 startTb = tb0; 71 } else { 72 unsigned long titan_usec = (titan_tod - startTitan) >> 12; 73 unsigned long tb_ticks = (tb0 - startTb); 74 unsigned long titan_jiffies = titan_usec / (1000000/HZ); 75 unsigned long titan_jiff_usec = titan_jiffies * (1000000/HZ); 76 unsigned long titan_jiff_rem_usec = 77 titan_usec - titan_jiff_usec; 78 unsigned long tb_jiffies = tb_ticks / tb_ticks_per_jiffy; 79 unsigned long tb_jiff_ticks = tb_jiffies * tb_ticks_per_jiffy; 80 unsigned long tb_jiff_rem_ticks = tb_ticks - tb_jiff_ticks; 81 unsigned long tb_jiff_rem_usec = 82 tb_jiff_rem_ticks / tb_ticks_per_usec; 83 unsigned long new_tb_ticks_per_jiffy = 84 (tb_ticks * (1000000/HZ))/titan_usec; 85 86 seq_printf(m, " titan elapsed = %lu uSec\n", titan_usec); 87 seq_printf(m, " tb elapsed = %lu ticks\n", tb_ticks); 88 seq_printf(m, " titan jiffies = %lu.%04lu\n", titan_jiffies, 89 titan_jiff_rem_usec); 90 seq_printf(m, " tb jiffies = %lu.%04lu\n", tb_jiffies, 91 tb_jiff_rem_usec); 92 seq_printf(m, " new tb_ticks_per_jiffy = %lu\n", 93 new_tb_ticks_per_jiffy); 94 } 95 96 return 0; 97} 98 99static int proc_titantod_open(struct inode *inode, struct file *file) 100{ 101 return single_open(file, proc_titantod_show, NULL); 102} 103 104static const struct file_operations proc_titantod_operations = { 105 .open = proc_titantod_open, 106 .read = seq_read, 107 .llseek = seq_lseek, 108 .release = single_release, 109}; 110 111static int __init iseries_proc_init(void) 112{ 113 if (!firmware_has_feature(FW_FEATURE_ISERIES)) 114 return 0; 115 116 proc_create("iSeries/titanTod", S_IFREG|S_IRUGO, NULL, 117 &proc_titantod_operations); 118 return 0; 119} 120__initcall(iseries_proc_init); 121