---

yaml
---
r: 18916
b: refs/heads/master
c: cff65c4
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4fef0c10fa174b57a10854b8b4b2b90d155706e0
+refs/heads/master: cff65c4f0ea6662124bbb7bf3806e5df1c6d735d

trunk/arch/um/include/os.h

@@ -190,7 +190,6 @@ extern int os_protect_memory(void *addr, unsigned long len,
 			     int r, int w, int x);
 extern int os_unmap_memory(void *addr, int len);
 extern void os_flush_stdout(void);
-extern unsigned long long os_usecs(void);
 
 /* tt.c
  * for tt mode only (will be deleted in future...)
@@ -245,4 +244,15 @@ extern void setup_machinename(char *machine_out);
 extern void setup_hostinfo(void);
 extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
 
+/* time.c */
+#define BILLION (1000 * 1000 * 1000)
+
+extern void switch_timers(int to_real);
+extern void idle_sleep(int secs);
+extern void enable_timer(void);
+extern void disable_timer(void);
+extern void user_time_init(void);
+extern void uml_idle_timer(void);
+extern unsigned long long os_nsecs(void);
+
 #endif

trunk/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
 

trunk/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"
 

trunk/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"

trunk/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"

trunk/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"

trunk/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();
 }

trunk/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:
- */

trunk/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"

trunk/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"

trunk/arch/um/os-Linux/main.c

@@ -16,7 +16,6 @@
 #include "user_util.h"
 #include "kern_util.h"
 #include "mem_user.h"
-#include "time_user.h"
 #include "irq_user.h"
 #include "user.h"
 #include "init.h"

trunk/arch/um/os-Linux/signal.c

@@ -18,8 +18,8 @@
 #include "sysdep/sigcontext.h"
 #include "sysdep/signal.h"
 #include "sigcontext.h"
-#include "time_user.h"
 #include "mode.h"
+#include "os.h"
 
 void sig_handler(ARCH_SIGHDLR_PARAM)
 {

trunk/arch/um/os-Linux/start_up.c

@@ -29,7 +29,6 @@
 #include "irq_user.h"
 #include "ptrace_user.h"
 #include "mem_user.h"
-#include "time_user.h"
 #include "init.h"
 #include "os.h"
 #include "uml-config.h"