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Diffstat (limited to 'arch/m32r/kernel/time.c')
| -rw-r--r-- | arch/m32r/kernel/time.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c deleted file mode 100644 index 521749fbbb56..000000000000 --- a/arch/m32r/kernel/time.c +++ /dev/null @@ -1,199 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/arch/m32r/kernel/time.c - * - * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata, - * Hitoshi Yamamoto - * Taken from i386 version. - * Copyright (C) 1991, 1992, 1995 Linus Torvalds - * Copyright (C) 1996, 1997, 1998 Ralf Baechle - * - * This file contains the time handling details for PC-style clocks as - * found in some MIPS systems. - * - * Some code taken from sh version. - * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka - * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> - */ - -#undef DEBUG_TIMER - -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/profile.h> - -#include <asm/io.h> -#include <asm/m32r.h> - -#include <asm/hw_irq.h> - -#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) -/* this needs a better home */ -DEFINE_SPINLOCK(rtc_lock); - -#ifdef CONFIG_RTC_DRV_CMOS_MODULE -EXPORT_SYMBOL(rtc_lock); -#endif -#endif /* pc-style 'CMOS' RTC support */ - -#ifdef CONFIG_SMP -extern void smp_local_timer_interrupt(void); -#endif - -#define TICK_SIZE (tick_nsec / 1000) - -/* - * Change this if you have some constant time drift - */ - -/* This is for machines which generate the exact clock. */ -#define USECS_PER_JIFFY (1000000/HZ) - -static unsigned long latch; - -static u32 m32r_gettimeoffset(void) -{ - unsigned long elapsed_time = 0; /* [us] */ - -#if defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_XNUX2) \ - || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_M32700) \ - || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104) -#ifndef CONFIG_SMP - - unsigned long count; - - /* timer count may underflow right here */ - count = inl(M32R_MFT2CUT_PORTL); - - if (inl(M32R_ICU_CR18_PORTL) & 0x00000100) /* underflow check */ - count = 0; - - count = (latch - count) * TICK_SIZE; - elapsed_time = DIV_ROUND_CLOSEST(count, latch); - /* NOTE: LATCH is equal to the "interval" value (= reload count). */ - -#else /* CONFIG_SMP */ - unsigned long count; - static unsigned long p_jiffies = -1; - static unsigned long p_count = 0; - - /* timer count may underflow right here */ - count = inl(M32R_MFT2CUT_PORTL); - - if (jiffies == p_jiffies && count > p_count) - count = 0; - - p_jiffies = jiffies; - p_count = count; - - count = (latch - count) * TICK_SIZE; - elapsed_time = DIV_ROUND_CLOSEST(count, latch); - /* NOTE: LATCH is equal to the "interval" value (= reload count). */ -#endif /* CONFIG_SMP */ -#elif defined(CONFIG_CHIP_M32310) -#warning do_gettimeoffse not implemented -#else -#error no chip configuration -#endif - - return elapsed_time * 1000; -} - -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "xtime_update()" routine every clocktick - */ -static irqreturn_t timer_interrupt(int irq, void *dev_id) -{ -#ifndef CONFIG_SMP - profile_tick(CPU_PROFILING); -#endif - xtime_update(1); - -#ifndef CONFIG_SMP - update_process_times(user_mode(get_irq_regs())); -#endif - /* As we return to user mode fire off the other CPU schedulers.. - this is basically because we don't yet share IRQ's around. - This message is rigged to be safe on the 386 - basically it's - a hack, so don't look closely for now.. */ - -#ifdef CONFIG_SMP - smp_local_timer_interrupt(); - smp_send_timer(); -#endif - - return IRQ_HANDLED; -} - -static struct irqaction irq0 = { - .handler = timer_interrupt, - .name = "MFT2", -}; - -void read_persistent_clock(struct timespec *ts) -{ - unsigned int epoch, year, mon, day, hour, min, sec; - - sec = min = hour = day = mon = year = 0; - epoch = 0; - - year = 23; - mon = 4; - day = 17; - - /* Attempt to guess the epoch. This is the same heuristic as in rtc.c - so no stupid things will happen to timekeeping. Who knows, maybe - Ultrix also uses 1952 as epoch ... */ - if (year > 10 && year < 44) - epoch = 1980; - else if (year < 96) - epoch = 1952; - year += epoch; - - ts->tv_sec = mktime(year, mon, day, hour, min, sec); - ts->tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ); -} - - -void __init time_init(void) -{ - arch_gettimeoffset = m32r_gettimeoffset; - -#if defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_XNUX2) \ - || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_M32700) \ - || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104) - - /* M32102 MFT setup */ - setup_irq(M32R_IRQ_MFT2, &irq0); - { - unsigned long bus_clock; - unsigned short divide; - - bus_clock = boot_cpu_data.bus_clock; - divide = boot_cpu_data.timer_divide; - latch = DIV_ROUND_CLOSEST(bus_clock/divide, HZ); - - printk("Timer start : latch = %ld\n", latch); - - outl((M32R_MFTMOD_CC_MASK | M32R_MFTMOD_TCCR \ - |M32R_MFTMOD_CSSEL011), M32R_MFT2MOD_PORTL); - outl(latch, M32R_MFT2RLD_PORTL); - outl(latch, M32R_MFT2CUT_PORTL); - outl(0, M32R_MFT2CMPRLD_PORTL); - outl((M32R_MFTCR_MFT2MSK|M32R_MFTCR_MFT2EN), M32R_MFTCR_PORTL); - } - -#elif defined(CONFIG_CHIP_M32310) -#warning time_init not implemented -#else -#error no chip configuration -#endif -} |