init gnumach copy

1 files changed, 112 insertions, 0 deletions

diff --git a/kern/mach_clock.h b/kern/mach_clock.h
new file mode 100644
index 0000000..66903b8
--- /dev/null
+++ b/kern/mach_clock.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Author: Barry deFreese and others.
+ */
+
+#ifndef _KERN_MACH_CLOCK_H_
+#define _KERN_MACH_CLOCK_H_
+
+/*
+ * Mach time-out and time-of-day facility.
+ */
+
+#include <mach/machine/kern_return.h>
+#include <mach/time_value.h>
+#include <kern/host.h>
+#include <kern/queue.h>
+#include <sys/types.h>
+
+struct io_req;
+typedef struct io_req *io_req_t;
+
+
+/* Timers in kernel.  */
+extern unsigned long	elapsed_ticks;	/* number of ticks elapsed since bootup */
+extern int		hz;		/* number of ticks per second */
+extern int		tick;		/* number of usec per tick */
+
+extern time_value64_t	time; 		/* time since bootup (uncorrected) */
+
+typedef void timer_func_t(void *);
+
+/* Time-out element.  */
+struct timer_elt {
+	queue_chain_t	chain;		/* chain in order of expiration */
+	timer_func_t	*fcn;		/* function to call */
+	void *		param;		/* with this parameter */
+	unsigned long	ticks;		/* expiration time, in ticks */
+	int		set;		/* unset | set | allocated */
+};
+#define	TELT_UNSET	0		/* timer not set */
+#define	TELT_SET	1		/* timer set */
+#define	TELT_ALLOC	2		/* timer allocated from pool */
+
+typedef	struct timer_elt	timer_elt_data_t;
+typedef	struct timer_elt	*timer_elt_t;
+
+
+extern void clock_interrupt(
+   int usec,
+   boolean_t usermode,
+   boolean_t basepri,
+   vm_offset_t pc);
+
+extern void softclock (void);
+
+/* For `private' timer elements.  */
+extern void set_timeout(
+   timer_elt_t telt,
+   unsigned int interval);
+extern boolean_t reset_timeout(timer_elt_t telt);
+
+#define	set_timeout_setup(telt,fcn,param,interval)	\
+	((telt)->fcn = (fcn),				\
+	 (telt)->param = (param),			\
+	 (telt)->private = TRUE,			\
+	set_timeout((telt), (interval)))
+
+#define	reset_timeout_check(t)				\
+	MACRO_BEGIN					\
+	if ((t)->set)					\
+	    reset_timeout((t));				\
+	MACRO_END
+
+extern void init_timeout (void);
+
+/*
+ * Record a timestamp in STAMP.  Records values in the boot-time clock
+ * frame.
+ */
+extern void record_time_stamp (time_value64_t *stamp);
+
+/*
+ * Read a timestamp in STAMP into RESULT.  Returns values in the
+ * real-time clock frame.
+ */
+extern void read_time_stamp (const time_value64_t *stamp, time_value64_t *result);
+
+extern void mapable_time_init (void);
+
+/* For public timer elements.  */
+extern void timeout(timer_func_t *fcn, void *param, int interval);
+extern boolean_t untimeout(timer_func_t *fcn, const void *param);
+
+extern int timeopen(dev_t dev, int flag, io_req_t ior);
+extern void timeclose(dev_t dev, int flag);
+
+#endif /* _KERN_MACH_CLOCK_H_ */