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[PATCH] uml: move libc-dependent time code

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The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all systemcalls from time.c file under os-Linux dir and joins
time.c and tine_kernel.c files

Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
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>
This commit is contained in:
Gennady Sharapov 2006-01-18 17:42:42 -08:00 committed by Linus Torvalds
parent 4fef0c10fa
commit cff65c4f0e
16 changed files with 213 additions and 96 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
arch/um/include/os.h
View file

@ -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

19
arch/um/include/time_user.h
View file

@ -1,19 +0,0 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#ifndef __TIME_USER_H__
#define __TIME_USER_H__
extern void timer(void);
extern void switch_timers(int to_real);
extern void idle_sleep(int secs);
extern void enable_timer(void);
extern void prepare_timer(void * ptr);
extern void disable_timer(void);
extern unsigned long time_lock(void);
extern void time_unlock(unsigned long);
extern void user_time_init(void);
#endif

4
arch/um/kernel/Makefile
View file

@ -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

1
arch/um/kernel/exec_kern.c
View file

@ -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"

1
arch/um/kernel/process_kern.c
View file

@ -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"

1
arch/um/kernel/skas/process.c
View file

@ -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"

1
arch/um/kernel/skas/process_kern.c
View file

@ -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"

4
arch/um/kernel/syscall.c
View file

@ -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();
}

124
arch/um/kernel/time_kern.c
View file

@ -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:
*/

1
arch/um/kernel/tt/exec_kern.c
View file

@ -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"

1
arch/um/kernel/tt/process_kern.c
View file

@ -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"

1
arch/um/os-Linux/main.c
View file

@ -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"

2
arch/um/os-Linux/signal.c
View file

@ -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)
{

1
arch/um/os-Linux/start_up.c
View file

@ -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"

135
arch/um/os-Linux/time.c
View file

@ -1,21 +1,128 @@
#include <stdlib.h>
#include <sys/time.h>
/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
unsigned long long os_usecs(void)
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include "user_util.h"
#include "kern_util.h"
#include "user.h"
#include "process.h"
#include "kern_constants.h"
#include "os.h"
/* XXX This really needs to be declared and initialized in a kernel file since
* it's in <linux/time.h>
*/
extern struct timespec wall_to_monotonic;
static void set_interval(int timer_type)
{
int usec = 1000000/hz();
struct itimerval interval = ((struct itimerval) { { 0, usec },
{ 0, usec } });
if(setitimer(timer_type, &interval, NULL) == -1)
panic("setitimer failed - errno = %d\n", errno);
}
void enable_timer(void)
{
set_interval(ITIMER_VIRTUAL);
}
void disable_timer(void)
{
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
if((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) ||
(setitimer(ITIMER_REAL, &disable, NULL) < 0))
printk("disnable_timer - setitimer failed, errno = %d\n",
errno);
/* If there are signals already queued, after unblocking ignore them */
set_handler(SIGALRM, SIG_IGN, 0, -1);
set_handler(SIGVTALRM, SIG_IGN, 0, -1);
}
void switch_timers(int to_real)
{
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
struct itimerval enable = ((struct itimerval) { { 0, 1000000/hz() },
{ 0, 1000000/hz() }});
int old, new;
if(to_real){
old = ITIMER_VIRTUAL;
new = ITIMER_REAL;
}
else {
old = ITIMER_REAL;
new = ITIMER_VIRTUAL;
}
if((setitimer(old, &disable, NULL) < 0) ||
(setitimer(new, &enable, NULL)))
printk("switch_timers - setitimer failed, errno = %d\n",
errno);
}
void uml_idle_timer(void)
{
if(signal(SIGVTALRM, SIG_IGN) == SIG_ERR)
panic("Couldn't unset SIGVTALRM handler");
set_handler(SIGALRM, (__sighandler_t) alarm_handler,
SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
set_interval(ITIMER_REAL);
}
extern void ktime_get_ts(struct timespec *ts);
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
void time_init(void)
{
struct timespec now;
if(signal(SIGVTALRM, boot_timer_handler) == SIG_ERR)
panic("Couldn't set SIGVTALRM handler");
set_interval(ITIMER_VIRTUAL);
do_posix_clock_monotonic_gettime(&now);
wall_to_monotonic.tv_sec = -now.tv_sec;
wall_to_monotonic.tv_nsec = -now.tv_nsec;
}
unsigned long long os_nsecs(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return((unsigned long long) tv.tv_sec * 1000000 + tv.tv_usec);
return((unsigned long long) tv.tv_sec * BILLION + tv.tv_usec * 1000);
}
/*
* 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:
*/
void idle_sleep(int secs)
{
struct timespec ts;
ts.tv_sec = secs;
ts.tv_nsec = 0;
nanosleep(&ts, NULL);
}
/* XXX This partly duplicates init_irq_signals */
void user_time_init(void)
{
set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
SIGALRM, SIGUSR2, -1);
set_handler(SIGALRM, (__sighandler_t) alarm_handler,
SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
SIGVTALRM, SIGUSR2, -1);
set_interval(ITIMER_VIRTUAL);
}

1
arch/um/os-Linux/tt.c
View file

@ -27,7 +27,6 @@
#include "sysdep/sigcontext.h"
#include "irq_user.h"
#include "ptrace_user.h"
#include "time_user.h"
#include "init.h"
#include "os.h"
#include "uml-config.h"