diff options
author | Jeff Dike <jdike@addtoit.com> | 2006-07-10 04:45:13 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-10 13:24:24 -0700 |
commit | 1d3468a6643a6a5905e2ac9ae1fa1aefc06d882a (patch) | |
tree | 9f605490ab72b8027e9f5e0d4c9626516d8a73c5 /arch/um/kernel/time_kern.c | |
parent | 469226a431f553a7b3ec17d87ce3c2d1c6c25fb2 (diff) | |
download | op-kernel-dev-1d3468a6643a6a5905e2ac9ae1fa1aefc06d882a.zip op-kernel-dev-1d3468a6643a6a5905e2ac9ae1fa1aefc06d882a.tar.gz |
[PATCH] uml: move _kern.c files
Move most *_kern.c files in arch/um/kernel to *.c. This makes UML somewhat
more closely resemble the other arches.
[akpm@osdl.org: use the new INTF_* flags]
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/kernel/time_kern.c')
-rw-r--r-- | arch/um/kernel/time_kern.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c deleted file mode 100644 index 552ca1c..0000000 --- a/arch/um/kernel/time_kern.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/kernel.h" -#include "linux/module.h" -#include "linux/unistd.h" -#include "linux/stddef.h" -#include "linux/spinlock.h" -#include "linux/time.h" -#include "linux/sched.h" -#include "linux/interrupt.h" -#include "linux/init.h" -#include "linux/delay.h" -#include "linux/hrtimer.h" -#include "asm/irq.h" -#include "asm/param.h" -#include "asm/current.h" -#include "kern_util.h" -#include "user_util.h" -#include "mode.h" -#include "os.h" - -int hz(void) -{ - return(HZ); -} - -/* - * Scheduler clock - returns current time in nanosec units. - */ -unsigned long long sched_clock(void) -{ - return (unsigned long long)jiffies_64 * (1000000000 / HZ); -} - -/* Changed at early boot */ -int timer_irq_inited = 0; - -static unsigned long long prev_nsecs; -#ifdef CONFIG_UML_REAL_TIME_CLOCK -static long long delta; /* Deviation per interval */ -#endif - -void timer_irq(union uml_pt_regs *regs) -{ - unsigned long long ticks = 0; - -#ifdef CONFIG_UML_REAL_TIME_CLOCK - if(prev_nsecs){ - /* We've had 1 tick */ - unsigned long long nsecs = os_nsecs(); - - delta += nsecs - prev_nsecs; - prev_nsecs = nsecs; - - /* Protect against the host clock being set backwards */ - if(delta < 0) - delta = 0; - - ticks += (delta * HZ) / BILLION; - delta -= (ticks * BILLION) / HZ; - } - else prev_nsecs = os_nsecs(); -#else - ticks = 1; -#endif - while(ticks > 0){ - do_IRQ(TIMER_IRQ, regs); - ticks--; - } -} - -static DEFINE_SPINLOCK(timer_spinlock); - -static unsigned long long local_offset = 0; - -static inline unsigned long long get_time(void) -{ - unsigned long long nsecs; - unsigned long flags; - - spin_lock_irqsave(&timer_spinlock, flags); - nsecs = os_nsecs(); - nsecs += local_offset; - spin_unlock_irqrestore(&timer_spinlock, flags); - - return nsecs; -} - -irqreturn_t um_timer(int irq, void *dev, struct pt_regs *regs) -{ - unsigned long long nsecs; - unsigned long flags; - - write_seqlock_irqsave(&xtime_lock, flags); - - do_timer(regs); - - nsecs = get_time() + local_offset; - xtime.tv_sec = nsecs / NSEC_PER_SEC; - xtime.tv_nsec = nsecs - xtime.tv_sec * NSEC_PER_SEC; - - write_sequnlock_irqrestore(&xtime_lock, flags); - - return IRQ_HANDLED; -} - -static void register_timer(void) -{ - int err; - - err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL); - if(err != 0) - printk(KERN_ERR "timer_init : request_irq failed - " - "errno = %d\n", -err); - - timer_irq_inited = 1; - - user_time_init(); -} - -extern void (*late_time_init)(void); - -void time_init(void) -{ - long long nsecs; - - nsecs = os_nsecs(); - set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION, - -nsecs % BILLION); - late_time_init = register_timer; -} - -void do_gettimeofday(struct timeval *tv) -{ - unsigned long long nsecs = get_time(); - - tv->tv_sec = nsecs / NSEC_PER_SEC; - /* Careful about calculations here - this was originally done as - * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC - * which gave bogus (> 1000000) values. Dunno why, suspect gcc - * (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion - * problem that I missed. - */ - nsecs -= tv->tv_sec * NSEC_PER_SEC; - tv->tv_usec = (unsigned long) nsecs / NSEC_PER_USEC; -} - -static inline void set_time(unsigned long long nsecs) -{ - unsigned long long now; - unsigned long flags; - - spin_lock_irqsave(&timer_spinlock, flags); - now = os_nsecs(); - local_offset = nsecs - now; - spin_unlock_irqrestore(&timer_spinlock, flags); - - clock_was_set(); -} - -int do_settimeofday(struct timespec *tv) -{ - set_time((unsigned long long) tv->tv_sec * NSEC_PER_SEC + tv->tv_nsec); - - return 0; -} - -void timer_handler(int sig, union uml_pt_regs *regs) -{ - local_irq_disable(); - irq_enter(); - update_process_times(CHOOSE_MODE( - (UPT_SC(regs) && user_context(UPT_SP(regs))), - (regs)->skas.is_user)); - irq_exit(); - local_irq_enable(); - if(current_thread->cpu == 0) - timer_irq(regs); -} |