2 * linux/arch/ia64/sn/kernel/sn2/timer.c
4 * Copyright (C) 2003 Silicon Graphics, Inc.
5 * Copyright (C) 2003 Hewlett-Packard Co
6 * David Mosberger <davidm@hpl.hp.com>: updated for new timer-interpolation infrastructure
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/time.h>
13 #include <linux/interrupt.h>
15 #include <asm/hw_irq.h>
16 #include <asm/system.h>
18 #include <asm/sn/leds.h>
19 #include <asm/sn/clksupport.h>
22 extern unsigned long sn_rtc_cycles_per_second
;
24 static struct time_interpolator sn2_interpolator
;
29 sn2_interpolator
.frequency
= sn_rtc_cycles_per_second
;
30 sn2_interpolator
.drift
= -1; /* unknown */
31 sn2_interpolator
.shift
= 10; /* RTC is 54 bits maximum shift is 10 */
32 sn2_interpolator
.addr
= RTC_COUNTER_ADDR
;
33 sn2_interpolator
.source
= TIME_SOURCE_MMIO64
;
34 register_time_interpolator(&sn2_interpolator
);