5dfe4c964a
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. [akpm@osdl.org: sparc64 fix] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
124 lines
3.7 KiB
C
124 lines
3.7 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/firmware.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;
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if (!firmware_has_feature(FW_FEATURE_ISERIES))
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return 0;
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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 const 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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if (!firmware_has_feature(FW_FEATURE_ISERIES))
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return 0;
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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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