blob: 0fe3116eba29c017d66a12ecec53a1df64391d12 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * iSeries_proc.c
3 * Copyright (C) 2001 Kyle A. Lucke IBM Corporation
4 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#include <linux/init.h>
21#include <linux/proc_fs.h>
22#include <linux/seq_file.h>
23#include <linux/param.h> /* for HZ */
24#include <asm/paca.h>
25#include <asm/processor.h>
26#include <asm/time.h>
27#include <asm/lppaca.h>
28#include <asm/iSeries/ItLpQueue.h>
29#include <asm/iSeries/HvCallXm.h>
30#include <asm/iSeries/IoHriMainStore.h>
Stephen Rothwell0bc0ffd2005-06-21 17:15:36 -070031#include <asm/iSeries/IoHriProcessorVpd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33static int __init iseries_proc_create(void)
34{
35 struct proc_dir_entry *e = proc_mkdir("iSeries", 0);
36 if (!e)
37 return 1;
38
39 return 0;
40}
41core_initcall(iseries_proc_create);
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043static unsigned long startTitan = 0;
44static unsigned long startTb = 0;
45
46static int proc_titantod_show(struct seq_file *m, void *v)
47{
48 unsigned long tb0, titan_tod;
49
50 tb0 = get_tb();
51 titan_tod = HvCallXm_loadTod();
52
53 seq_printf(m, "Titan\n" );
54 seq_printf(m, " time base = %016lx\n", tb0);
55 seq_printf(m, " titan tod = %016lx\n", titan_tod);
56 seq_printf(m, " xProcFreq = %016x\n",
57 xIoHriProcessorVpd[0].xProcFreq);
58 seq_printf(m, " xTimeBaseFreq = %016x\n",
59 xIoHriProcessorVpd[0].xTimeBaseFreq);
60 seq_printf(m, " tb_ticks_per_jiffy = %lu\n", tb_ticks_per_jiffy);
61 seq_printf(m, " tb_ticks_per_usec = %lu\n", tb_ticks_per_usec);
62
63 if (!startTitan) {
64 startTitan = titan_tod;
65 startTb = tb0;
66 } else {
67 unsigned long titan_usec = (titan_tod - startTitan) >> 12;
68 unsigned long tb_ticks = (tb0 - startTb);
69 unsigned long titan_jiffies = titan_usec / (1000000/HZ);
70 unsigned long titan_jiff_usec = titan_jiffies * (1000000/HZ);
71 unsigned long titan_jiff_rem_usec = titan_usec - titan_jiff_usec;
72 unsigned long tb_jiffies = tb_ticks / tb_ticks_per_jiffy;
73 unsigned long tb_jiff_ticks = tb_jiffies * tb_ticks_per_jiffy;
74 unsigned long tb_jiff_rem_ticks = tb_ticks - tb_jiff_ticks;
75 unsigned long tb_jiff_rem_usec = tb_jiff_rem_ticks / tb_ticks_per_usec;
76 unsigned long new_tb_ticks_per_jiffy = (tb_ticks * (1000000/HZ))/titan_usec;
77
78 seq_printf(m, " titan elapsed = %lu uSec\n", titan_usec);
79 seq_printf(m, " tb elapsed = %lu ticks\n", tb_ticks);
80 seq_printf(m, " titan jiffies = %lu.%04lu \n", titan_jiffies,
81 titan_jiff_rem_usec);
82 seq_printf(m, " tb jiffies = %lu.%04lu\n", tb_jiffies,
83 tb_jiff_rem_usec);
84 seq_printf(m, " new tb_ticks_per_jiffy = %lu\n",
85 new_tb_ticks_per_jiffy);
86 }
87
88 return 0;
89}
90
91static int proc_titantod_open(struct inode *inode, struct file *file)
92{
93 return single_open(file, proc_titantod_show, NULL);
94}
95
96static struct file_operations proc_titantod_operations = {
97 .open = proc_titantod_open,
98 .read = seq_read,
99 .llseek = seq_lseek,
100 .release = single_release,
101};
102
103static int __init iseries_proc_init(void)
104{
105 struct proc_dir_entry *e;
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 e = create_proc_entry("iSeries/titanTod", S_IFREG|S_IRUGO, NULL);
108 if (e)
109 e->proc_fops = &proc_titantod_operations;
110
111 return 0;
112}
113__initcall(iseries_proc_init);