Release 4.11 arch/ia64/sn/kernel/sn2/timer.c

/*
 * linux/arch/ia64/sn/kernel/sn2/timer.c
 *
 * Copyright (C) 2003 Silicon Graphics, Inc.
 * Copyright (C) 2003 Hewlett-Packard Co
 *      David Mosberger <davidm@hpl.hp.com>: updated for new timer-interpolation infrastructure
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/interrupt.h>
#include <linux/clocksource.h>

#include <asm/hw_irq.h>
#include <asm/timex.h>

#include <asm/sn/leds.h>
#include <asm/sn/shub_mmr.h>
#include <asm/sn/clksupport.h>

extern unsigned long sn_rtc_cycles_per_second;



static u64 read_sn2(struct clocksource *cs)
{
	return (u64)readq(RTC_COUNTER_ADDR);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
13
65.00%
1
25.00%
Magnus Damm
4
20.00%
1
25.00%
Thomas Gleixner
2
10.00%
1
25.00%
Christoph Lameter
1
5.00%
1
25.00%
Total
20
100.00%
4
100.00%


static struct clocksource clocksource_sn2 = {
        .name           = "sn2_rtc",
        .rating         = 450,
        .read           = read_sn2,
        .mask           = (1LL << 55) - 1,
        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
};

/*
 * sn udelay uses the RTC instead of the ITC because the ITC is not
 * synchronized across all CPUs, and the thread may migrate to another CPU
 * if preemption is enabled.
 */

static void

ia64_sn_udelay (unsigned long usecs)
{
	unsigned long start = rtc_time();
	unsigned long end = start +
			usecs * sn_rtc_cycles_per_second / 1000000;

	while (time_before((unsigned long)rtc_time(), end))
		cpu_relax();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Hawkes
46
100.00%
1
100.00%
Total
46
100.00%
1
100.00%



void __init sn_timer_init(void)
{
	clocksource_sn2.archdata.fsys_mmio = RTC_COUNTER_ADDR;
	clocksource_register_hz(&clocksource_sn2, sn_rtc_cycles_per_second);

	ia64_udelay = &ia64_sn_udelay;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Lameter
10
34.48%
2
25.00%
John Hawkes
5
17.24%
1
12.50%
Jack Steiner
4
13.79%
1
12.50%
Tony Luck
3
10.34%
1
12.50%
John Stultz
3
10.34%
1
12.50%
Andrew Lutomirski
2
6.90%
1
12.50%
Jes Sorensen
2
6.90%
1
12.50%
Total
29
100.00%
8
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
John Hawkes
55
31.79%
1
7.14%
Jes Sorensen
33
19.08%
1
7.14%
Tony Luck
33
19.08%
1
7.14%
Christoph Lameter
29
16.76%
3
21.43%
David Mosberger-Tang
5
2.89%
2
14.29%
Magnus Damm
4
2.31%
1
7.14%
Jack Steiner
4
2.31%
1
7.14%
Patrick Gefre
3
1.73%
1
7.14%
John Stultz
3
1.73%
1
7.14%
Andrew Lutomirski
2
1.16%
1
7.14%
Thomas Gleixner
2
1.16%
1
7.14%
Total
173
100.00%
14
100.00%
Directory: arch/ia64/sn/kernel/sn2

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.