Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
new file mode 100644
index 0000000..c40c86a
--- /dev/null
+++ b/arch/um/kernel/time.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#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 "signal_user.h"
+#include "time_user.h"
+#include "kern_constants.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;
+
+extern struct timeval xtime;
+
+struct timeval local_offset = { 0, 0 };
+
+void timer(void)
+{
+ gettimeofday(&xtime, NULL);
+ timeradd(&xtime, &local_offset, &xtime);
+}
+
+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)
+{
+ int usec = 1000000/hz();
+ struct itimerval enable = ((struct itimerval) { { 0, usec },
+ { 0, usec }});
+ if(setitimer(ITIMER_VIRTUAL, &enable, NULL))
+ printk("enable_timer - setitimer failed, errno = %d\n",
+ errno);
+}
+
+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 int do_posix_clock_monotonic_gettime(struct timespec *tp);
+
+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;
+}
+
+/* Declared in linux/time.h, which can't be included here */
+extern void clock_was_set(void);
+
+void do_gettimeofday(struct timeval *tv)
+{
+ unsigned long flags;
+
+ flags = time_lock();
+ gettimeofday(tv, NULL);
+ timeradd(tv, &local_offset, tv);
+ time_unlock(flags);
+ clock_was_set();
+}
+
+int do_settimeofday(struct timespec *tv)
+{
+ struct timeval now;
+ unsigned long flags;
+ struct timeval tv_in;
+
+ if ((unsigned long) tv->tv_nsec >= UM_NSEC_PER_SEC)
+ return -EINVAL;
+
+ tv_in.tv_sec = tv->tv_sec;
+ tv_in.tv_usec = tv->tv_nsec / 1000;
+
+ flags = time_lock();
+ gettimeofday(&now, NULL);
+ timersub(&tv_in, &now, &local_offset);
+ time_unlock(flags);
+
+ return(0);
+}
+
+void idle_sleep(int secs)
+{
+ struct timespec ts;
+
+ ts.tv_sec = secs;
+ ts.tv_nsec = 0;
+ nanosleep(&ts, NULL);
+}
+
+/*
+ * 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:
+ */