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/*
* Copyright (C) 2001 Kyle A. Lucke IBM Corporation
* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/param.h> /* for HZ */
#include <asm/paca.h>
#include <asm/processor.h>
#include <asm/time.h>
#include <asm/lppaca.h>
#include <asm/firmware.h>
#include <asm/iseries/hv_call_xm.h>
#include "processor_vpd.h"
#include "main_store.h"
static int __init iseries_proc_create(void)
{
struct proc_dir_entry *e;
if (!firmware_has_feature(FW_FEATURE_ISERIES))
return 0;
e = proc_mkdir("iSeries", 0);
if (!e)
return 1;
return 0;
}
core_initcall(iseries_proc_create);
static unsigned long startTitan = 0;
static unsigned long startTb = 0;
static int proc_titantod_show(struct seq_file *m, void *v)
{
unsigned long tb0, titan_tod;
tb0 = get_tb();
titan_tod = HvCallXm_loadTod();
seq_printf(m, "Titan\n" );
seq_printf(m, " time base = %016lx\n", tb0);
seq_printf(m, " titan tod = %016lx\n", titan_tod);
seq_printf(m, " xProcFreq = %016x\n",
xIoHriProcessorVpd[0].xProcFreq);
seq_printf(m, " xTimeBaseFreq = %016x\n",
xIoHriProcessorVpd[0].xTimeBaseFreq);
seq_printf(m, " tb_ticks_per_jiffy = %lu\n", tb_ticks_per_jiffy);
seq_printf(m, " tb_ticks_per_usec = %lu\n", tb_ticks_per_usec);
if (!startTitan) {
startTitan = titan_tod;
startTb = tb0;
} else {
unsigned long titan_usec = (titan_tod - startTitan) >> 12;
unsigned long tb_ticks = (tb0 - startTb);
unsigned long titan_jiffies = titan_usec / (1000000/HZ);
unsigned long titan_jiff_usec = titan_jiffies * (1000000/HZ);
unsigned long titan_jiff_rem_usec =
titan_usec - titan_jiff_usec;
unsigned long tb_jiffies = tb_ticks / tb_ticks_per_jiffy;
unsigned long tb_jiff_ticks = tb_jiffies * tb_ticks_per_jiffy;
unsigned long tb_jiff_rem_ticks = tb_ticks - tb_jiff_ticks;
unsigned long tb_jiff_rem_usec =
tb_jiff_rem_ticks / tb_ticks_per_usec;
unsigned long new_tb_ticks_per_jiffy =
(tb_ticks * (1000000/HZ))/titan_usec;
seq_printf(m, " titan elapsed = %lu uSec\n", titan_usec);
seq_printf(m, " tb elapsed = %lu ticks\n", tb_ticks);
seq_printf(m, " titan jiffies = %lu.%04lu \n", titan_jiffies,
titan_jiff_rem_usec);
seq_printf(m, " tb jiffies = %lu.%04lu\n", tb_jiffies,
tb_jiff_rem_usec);
seq_printf(m, " new tb_ticks_per_jiffy = %lu\n",
new_tb_ticks_per_jiffy);
}
return 0;
}
static int proc_titantod_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_titantod_show, NULL);
}
static const struct file_operations proc_titantod_operations = {
.open = proc_titantod_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init iseries_proc_init(void)
{
struct proc_dir_entry *e;
if (!firmware_has_feature(FW_FEATURE_ISERIES))
return 0;
e = create_proc_entry("iSeries/titanTod", S_IFREG|S_IRUGO, NULL);
if (e)
e->proc_fops = &proc_titantod_operations;
return 0;
}
__initcall(iseries_proc_init);
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