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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/*
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* Copyright (C) 2001 Kyle A. Lucke IBM Corporation
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* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/param.h> /* for HZ */
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#include <asm/paca.h>
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#include <asm/processor.h>
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#include <asm/time.h>
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#include <asm/lppaca.h>
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#include <asm/iSeries/ItLpQueue.h>
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#include <asm/iseries/hv_call_xm.h>
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#include "processor_vpd.h"
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#include "main_store.h"
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static int __init iseries_proc_create(void)
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{
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struct proc_dir_entry *e = proc_mkdir("iSeries", 0);
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if (!e)
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return 1;
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return 0;
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}
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core_initcall(iseries_proc_create);
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static unsigned long startTitan = 0;
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static unsigned long startTb = 0;
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static int proc_titantod_show(struct seq_file *m, void *v)
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{
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unsigned long tb0, titan_tod;
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tb0 = get_tb();
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titan_tod = HvCallXm_loadTod();
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seq_printf(m, "Titan\n" );
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seq_printf(m, " time base = %016lx\n", tb0);
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seq_printf(m, " titan tod = %016lx\n", titan_tod);
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seq_printf(m, " xProcFreq = %016x\n",
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xIoHriProcessorVpd[0].xProcFreq);
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seq_printf(m, " xTimeBaseFreq = %016x\n",
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xIoHriProcessorVpd[0].xTimeBaseFreq);
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seq_printf(m, " tb_ticks_per_jiffy = %lu\n", tb_ticks_per_jiffy);
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seq_printf(m, " tb_ticks_per_usec = %lu\n", tb_ticks_per_usec);
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if (!startTitan) {
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startTitan = titan_tod;
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startTb = tb0;
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} else {
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unsigned long titan_usec = (titan_tod - startTitan) >> 12;
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unsigned long tb_ticks = (tb0 - startTb);
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unsigned long titan_jiffies = titan_usec / (1000000/HZ);
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unsigned long titan_jiff_usec = titan_jiffies * (1000000/HZ);
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unsigned long titan_jiff_rem_usec =
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titan_usec - titan_jiff_usec;
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unsigned long tb_jiffies = tb_ticks / tb_ticks_per_jiffy;
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unsigned long tb_jiff_ticks = tb_jiffies * tb_ticks_per_jiffy;
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unsigned long tb_jiff_rem_ticks = tb_ticks - tb_jiff_ticks;
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unsigned long tb_jiff_rem_usec =
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tb_jiff_rem_ticks / tb_ticks_per_usec;
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unsigned long new_tb_ticks_per_jiffy =
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(tb_ticks * (1000000/HZ))/titan_usec;
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seq_printf(m, " titan elapsed = %lu uSec\n", titan_usec);
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seq_printf(m, " tb elapsed = %lu ticks\n", tb_ticks);
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seq_printf(m, " titan jiffies = %lu.%04lu \n", titan_jiffies,
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titan_jiff_rem_usec);
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seq_printf(m, " tb jiffies = %lu.%04lu\n", tb_jiffies,
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tb_jiff_rem_usec);
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seq_printf(m, " new tb_ticks_per_jiffy = %lu\n",
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new_tb_ticks_per_jiffy);
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}
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return 0;
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}
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static int proc_titantod_open(struct inode *inode, struct file *file)
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{
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return single_open(file, proc_titantod_show, NULL);
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}
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static struct file_operations proc_titantod_operations = {
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.open = proc_titantod_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init iseries_proc_init(void)
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{
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struct proc_dir_entry *e;
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e = create_proc_entry("iSeries/titanTod", S_IFREG|S_IRUGO, NULL);
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if (e)
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e->proc_fops = &proc_titantod_operations;
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return 0;
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}
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__initcall(iseries_proc_init);
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