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
iseries_proc_create(void)33 static 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 }
46 core_initcall(iseries_proc_create);
47
48 static unsigned long startTitan = 0;
49 static unsigned long startTb = 0;
50
proc_titantod_show(struct seq_file * m,void * v)51 static 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
proc_titantod_open(struct inode * inode,struct file * file)99 static int proc_titantod_open(struct inode *inode, struct file *file)
100 {
101 return single_open(file, proc_titantod_show, NULL);
102 }
103
104 static 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
iseries_proc_init(void)111 static 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