ia64/xen-unstable

annotate xen/include/xen/time.h @ 1488:4f79516ed019

bitkeeper revision 1.971 (40d0bbb1JPrSxn2RF8RhPvWOZBY1Sg)

More code excision.
author kaf24@scramble.cl.cam.ac.uk
date Wed Jun 16 21:29:21 2004 +0000 (2004-06-16)
parents 55825bcb964e
children b914ff7d73b5 3f929065a1d1 0a4b76b6b5a0
rev   line source
kaf24@1210 1 /* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
kaf24@1210 2 ****************************************************************************
kaf24@1210 3 * (C) 2002 - Rolf Neugebauer - Intel Research Cambridge
kaf24@1210 4 ****************************************************************************
kaf24@1210 5 *
kaf24@1210 6 * File: time.h
kaf24@1210 7 * Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
kaf24@1210 8 * Changes:
kaf24@1210 9 *
kaf24@1210 10 * Date: Nov 2002
kaf24@1210 11 *
kaf24@1210 12 * Environment: Xen Hypervisor
kaf24@1210 13 * Description: This file provides a one stop shop for all time related
kaf24@1210 14 * issues within the hypervisor.
kaf24@1210 15 *
kaf24@1210 16 * The Hypervisor provides the following notions of time:
kaf24@1210 17 * Cycle Counter Time, System Time, Wall Clock Time, and
kaf24@1210 18 * Domain Virtual Time.
kaf24@1210 19 *
kaf24@1210 20 ****************************************************************************
kaf24@1210 21 * $Id: h-insert.h,v 1.4 2002/11/08 16:03:55 rn Exp $
kaf24@1210 22 ****************************************************************************
kaf24@1210 23 */
kaf24@1210 24
kaf24@1210 25
kaf24@1210 26
kaf24@1211 27 #ifndef __XEN_TIME_H__
kaf24@1211 28 #define __XEN_TIME_H__
kaf24@1210 29
kaf24@1210 30 #include <xen/types.h>
kaf24@1210 31 #include <hypervisor-ifs/hypervisor-if.h>
kaf24@1210 32
kaf24@1210 33 extern int init_xen_time();
kaf24@1210 34
kaf24@1488 35 extern unsigned long cpu_khz;
kaf24@1210 36
kaf24@1210 37 /*
kaf24@1210 38 * System Time
kaf24@1210 39 * 64 bit value containing the nanoseconds elapsed since boot time.
kaf24@1210 40 * This value is adjusted by frequency drift.
kaf24@1210 41 * NOW() returns the current time.
kaf24@1210 42 * The other macros are for convenience to approximate short intervals
kaf24@1210 43 * of real time into system time
kaf24@1210 44 */
kaf24@1210 45
kaf24@1488 46 typedef s64 s_time_t;
kaf24@1488 47
kaf24@1210 48 s_time_t get_s_time(void);
kaf24@1210 49
kaf24@1486 50 #define NOW() ((s_time_t)get_s_time())
kaf24@1486 51 #define SECONDS(_s) (((s_time_t)(_s)) * 1000000000ULL )
kaf24@1486 52 #define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000ULL )
kaf24@1486 53 #define MICROSECS(_us) (((s_time_t)(_us)) * 1000ULL )
kaf24@1210 54
kaf24@1210 55 extern void update_dom_time(shared_info_t *si);
kaf24@1210 56 extern void do_settime(unsigned long secs, unsigned long usecs,
kaf24@1210 57 u64 system_time_base);
kaf24@1210 58
kaf24@1211 59 #endif /* __XEN_TIME_H__ */