37 lines
865 B
C
37 lines
865 B
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 <asm/hw_irq.h>
|
||
|
|
#include <asm/system.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 struct time_interpolator sn2_interpolator = {
|
||
|
|
.drift = -1,
|
||
|
|
.shift = 10,
|
||
|
|
.mask = (1LL << 55) - 1,
|
||
|
|
.source = TIME_SOURCE_MMIO64
|
||
|
|
};
|
||
|
|
|
||
|
|
void __init sn_timer_init(void)
|
||
|
|
{
|
||
|
|
sn2_interpolator.frequency = sn_rtc_cycles_per_second;
|
||
|
|
sn2_interpolator.addr = RTC_COUNTER_ADDR;
|
||
|
|
register_time_interpolator(&sn2_interpolator);
|
||
|
|
}
|