diff options
Diffstat (limited to 'arch/ia64/sn/kernel/sn2/timer.c')
-rw-r--r-- | arch/ia64/sn/kernel/sn2/timer.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/arch/ia64/sn/kernel/sn2/timer.c b/arch/ia64/sn/kernel/sn2/timer.c deleted file mode 100644 index 3009d9d86f29..000000000000 --- a/arch/ia64/sn/kernel/sn2/timer.c +++ /dev/null @@ -1,61 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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); -} - -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(); -} - -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; -} |