Merge head 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
[linux-2.6] / arch / ppc64 / kernel / iSeries_proc.c
1 /*
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>
31 #include <asm/iSeries/IoHriProcessorVpd.h>
32
33 static 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 }
41 core_initcall(iseries_proc_create);
42
43 static unsigned long startTitan = 0;
44 static unsigned long startTb = 0;
45
46 static 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
91 static int proc_titantod_open(struct inode *inode, struct file *file)
92 {
93         return single_open(file, proc_titantod_show, NULL);
94 }
95
96 static 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
103 static int __init iseries_proc_init(void)
104 {
105         struct proc_dir_entry *e;
106
107         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);