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-rw-r--r--arch/um/kernel/Makefile4
-rw-r--r--arch/um/kernel/exec_kern.c1
-rw-r--r--arch/um/kernel/process_kern.c1
-rw-r--r--arch/um/kernel/skas/process.c1
-rw-r--r--arch/um/kernel/skas/process_kern.c1
-rw-r--r--arch/um/kernel/syscall.c4
-rw-r--r--arch/um/kernel/time_kern.c124
-rw-r--r--arch/um/kernel/tt/exec_kern.c1
-rw-r--r--arch/um/kernel/tt/process_kern.c1
9 files changed, 80 insertions, 58 deletions
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 165c8639c9f..693018ba80f 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -9,7 +9,7 @@ clean-files :=
obj-y = config.o exec_kern.o exitcode.o \
init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
- signal_kern.o smp.o syscall_kern.o sysrq.o time.o \
+ signal_kern.o smp.o syscall_kern.o sysrq.o \
time_kern.o tlb.o trap_kern.o uaccess.o um_arch.o umid.o
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
@@ -23,7 +23,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/
user-objs-$(CONFIG_TTY_LOG) += tty_log.o
-USER_OBJS := $(user-objs-y) config.o time.o tty_log.o
+USER_OBJS := $(user-objs-y) config.o tty_log.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/exec_kern.c b/arch/um/kernel/exec_kern.c
index efd222ffe20..569fe8b9b05 100644
--- a/arch/um/kernel/exec_kern.c
+++ b/arch/um/kernel/exec_kern.c
@@ -17,7 +17,6 @@
#include "irq_user.h"
#include "tlb.h"
#include "os.h"
-#include "time_user.h"
#include "choose-mode.h"
#include "mode_kern.h"
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 7f13b85d265..e167cf0a71f 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -39,7 +39,6 @@
#include "init.h"
#include "irq_user.h"
#include "mem_user.h"
-#include "time_user.h"
#include "tlb.h"
#include "frame_kern.h"
#include "sigcontext.h"
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index 3b3955d8440..eea1c9c4bb0 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -18,7 +18,6 @@
#include <asm/types.h>
#include "user.h"
#include "ptrace_user.h"
-#include "time_user.h"
#include "sysdep/ptrace.h"
#include "user_util.h"
#include "kern_util.h"
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index fcddee76c7c..a340006dec4 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -13,7 +13,6 @@
#include "asm/uaccess.h"
#include "asm/atomic.h"
#include "kern_util.h"
-#include "time_user.h"
#include "skas.h"
#include "os.h"
#include "user_util.h"
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index 1429c131879..1731d90e685 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -25,12 +25,12 @@ int record_syscall_start(int syscall)
syscall_record[index].syscall = syscall;
syscall_record[index].pid = current_pid();
syscall_record[index].result = 0xdeadbeef;
- syscall_record[index].start = os_usecs();
+ syscall_record[index].start = os_nsecs();
return(index);
}
void record_syscall_end(int index, long result)
{
syscall_record[index].result = result;
- syscall_record[index].end = os_usecs();
+ syscall_record[index].end = os_nsecs();
}
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 020ca79b8d3..6712ffad024 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -1,4 +1,4 @@
-/*
+/*
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -13,12 +13,12 @@
#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 "time_user.h"
#include "mode.h"
#include "os.h"
@@ -39,7 +39,7 @@ unsigned long long sched_clock(void)
int timer_irq_inited = 0;
static int first_tick;
-static unsigned long long prev_usecs;
+static unsigned long long prev_nsecs;
#ifdef CONFIG_UML_REAL_TIME_CLOCK
static long long delta; /* Deviation per interval */
#endif
@@ -58,23 +58,23 @@ void timer_irq(union uml_pt_regs *regs)
if(first_tick){
#ifdef CONFIG_UML_REAL_TIME_CLOCK
/* We've had 1 tick */
- unsigned long long usecs = os_usecs();
+ unsigned long long nsecs = os_nsecs();
- delta += usecs - prev_usecs;
- prev_usecs = usecs;
+ delta += nsecs - prev_nsecs;
+ prev_nsecs = nsecs;
/* Protect against the host clock being set backwards */
if(delta < 0)
delta = 0;
- ticks += (delta * HZ) / MILLION;
- delta -= (ticks * MILLION) / HZ;
+ ticks += (delta * HZ) / BILLION;
+ delta -= (ticks * BILLION) / HZ;
#else
ticks = 1;
#endif
}
else {
- prev_usecs = os_usecs();
+ prev_nsecs = os_nsecs();
first_tick = 1;
}
@@ -88,45 +88,99 @@ void boot_timer_handler(int sig)
{
struct pt_regs regs;
- CHOOSE_MODE((void)
+ CHOOSE_MODE((void)
(UPT_SC(&regs.regs) = (struct sigcontext *) (&sig + 1)),
(void) (regs.regs.skas.is_user = 0));
do_timer(&regs);
}
+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;
do_timer(regs);
+
write_seqlock_irqsave(&xtime_lock, flags);
- timer();
+ 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);
}
long um_time(int __user *tloc)
{
- struct timeval now;
+ long ret = get_time() / NSEC_PER_SEC;
- do_gettimeofday(&now);
- if (tloc) {
- if (put_user(now.tv_sec, tloc))
- now.tv_sec = -EFAULT;
- }
- return now.tv_sec;
+ if((tloc != NULL) && put_user(ret, tloc))
+ return -EFAULT;
+
+ return ret;
+}
+
+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();
}
long um_stime(int __user *tptr)
{
int value;
- struct timespec new;
if (get_user(value, tptr))
return -EFAULT;
- new.tv_sec = value;
- new.tv_nsec = 0;
- do_settimeofday(&new);
+
+ set_time((unsigned long long) value * NSEC_PER_SEC);
+
+ return 0;
+}
+
+int do_settimeofday(struct timespec *tv)
+{
+ set_time((unsigned long long) tv->tv_sec * NSEC_PER_SEC + tv->tv_nsec);
+
return 0;
}
@@ -142,21 +196,6 @@ void timer_handler(int sig, union uml_pt_regs *regs)
timer_irq(regs);
}
-static DEFINE_SPINLOCK(timer_spinlock);
-
-unsigned long time_lock(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&timer_spinlock, flags);
- return(flags);
-}
-
-void time_unlock(unsigned long flags)
-{
- spin_unlock_irqrestore(&timer_spinlock, flags);
-}
-
int __init timer_init(void)
{
int err;
@@ -171,14 +210,3 @@ int __init timer_init(void)
}
__initcall(timer_init);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
index 8f40e483873..5c1e4cc1c04 100644
--- a/arch/um/kernel/tt/exec_kern.c
+++ b/arch/um/kernel/tt/exec_kern.c
@@ -13,7 +13,6 @@
#include "user_util.h"
#include "kern_util.h"
#include "irq_user.h"
-#include "time_user.h"
#include "mem_user.h"
#include "os.h"
#include "tlb.h"
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index 62535303aa2..295c1ac817b 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -18,7 +18,6 @@
#include "os.h"
#include "kern.h"
#include "sigcontext.h"
-#include "time_user.h"
#include "mem_user.h"
#include "tlb.h"
#include "mode.h"
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 04:29:33 +0000