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/****************************************************************************
* (C) 2002 - Rolf Neugebauer - Intel Research Cambridge
****************************************************************************
*
* File: time.h
* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
* Changes:
*
* Date: Nov 2002
*
* Environment: Xen Hypervisor
* Description: This file provides a one stop shop for all time related
* issues within the hypervisor.
*
* The Hypervisor provides the following notions of time:
* Cycle Counter Time, System Time, Wall Clock Time, and
* Domain Virtual Time.
*
****************************************************************************
* $Id: h-insert.h,v 1.4 2002/11/08 16:03:55 rn Exp $
****************************************************************************
*/
#ifndef __XEN_TIME_H__
#define __XEN_TIME_H__
#include <xen/types.h>
#include <public/xen.h>
#include <asm/time.h>
extern int init_xen_time();
extern unsigned long cpu_khz;
struct domain;
/*
* System Time
* 64 bit value containing the nanoseconds elapsed since boot time.
* This value is adjusted by frequency drift.
* NOW() returns the current time.
* The other macros are for convenience to approximate short intervals
* of real time into system time
*/
typedef s64 s_time_t;
s_time_t get_s_time(void);
#define NOW() ((s_time_t)get_s_time())
#define SECONDS(_s) (((s_time_t)(_s)) * 1000000000ULL )
#define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000ULL )
#define MICROSECS(_us) (((s_time_t)(_us)) * 1000ULL )
extern void update_dom_time(struct exec_domain *ed);
extern void do_settime(
unsigned long secs, unsigned long usecs, u64 system_time_base);
#endif /* __XEN_TIME_H__ */
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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