ia64/xen-unstable

annotate xen/include/xen/time.h @ 4294:46155de3064d

bitkeeper revision 1.1236.43.1 (4242f75e6Zk-5XZxY7UL-J_Qi8D43g)

Fix VIRQ_TIMER holdoff for SMP guests.
Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Thu Mar 24 17:22:38 2005 +0000 (2005-03-24)
parents a13b9052d91d
children a01199a95070 fac5011f75be
rev   line source
kaf24@3914 1 /****************************************************************************
kaf24@1210 2 * (C) 2002 - Rolf Neugebauer - Intel Research Cambridge
kaf24@1210 3 ****************************************************************************
kaf24@1210 4 *
kaf24@1210 5 * File: time.h
kaf24@1210 6 * Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
kaf24@1210 7 * Changes:
kaf24@1210 8 *
kaf24@1210 9 * Date: Nov 2002
kaf24@1210 10 *
kaf24@1210 11 * Environment: Xen Hypervisor
kaf24@1210 12 * Description: This file provides a one stop shop for all time related
kaf24@1210 13 * issues within the hypervisor.
kaf24@1210 14 *
kaf24@1210 15 * The Hypervisor provides the following notions of time:
kaf24@1210 16 * Cycle Counter Time, System Time, Wall Clock Time, and
kaf24@1210 17 * Domain Virtual Time.
kaf24@1210 18 *
kaf24@1210 19 ****************************************************************************
kaf24@1210 20 * $Id: h-insert.h,v 1.4 2002/11/08 16:03:55 rn Exp $
kaf24@1210 21 ****************************************************************************
kaf24@1210 22 */
kaf24@1210 23
kaf24@1210 24
kaf24@1210 25
kaf24@1211 26 #ifndef __XEN_TIME_H__
kaf24@1211 27 #define __XEN_TIME_H__
kaf24@1210 28
kaf24@1210 29 #include <xen/types.h>
kaf24@2789 30 #include <public/xen.h>
kaf24@3645 31 #include <asm/time.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
cl349@2922 37 struct domain;
cl349@2922 38
kaf24@1210 39 /*
kaf24@1210 40 * System Time
kaf24@1210 41 * 64 bit value containing the nanoseconds elapsed since boot time.
kaf24@1210 42 * This value is adjusted by frequency drift.
kaf24@1210 43 * NOW() returns the current time.
kaf24@1210 44 * The other macros are for convenience to approximate short intervals
kaf24@1210 45 * of real time into system time
kaf24@1210 46 */
kaf24@1210 47
kaf24@1488 48 typedef s64 s_time_t;
kaf24@1488 49
kaf24@1210 50 s_time_t get_s_time(void);
kaf24@1210 51
kaf24@1486 52 #define NOW() ((s_time_t)get_s_time())
kaf24@1486 53 #define SECONDS(_s) (((s_time_t)(_s)) * 1000000000ULL )
kaf24@1486 54 #define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000ULL )
kaf24@1486 55 #define MICROSECS(_us) (((s_time_t)(_us)) * 1000ULL )
kaf24@1210 56
kaf24@4294 57 extern void update_dom_time(struct exec_domain *ed);
kaf24@4294 58 extern void do_settime(
kaf24@4294 59 unsigned long secs, unsigned long usecs, u64 system_time_base);
kaf24@1210 60
kaf24@1211 61 #endif /* __XEN_TIME_H__ */
kaf24@3914 62
kaf24@3914 63 /*
kaf24@3914 64 * Local variables:
kaf24@3914 65 * mode: C
kaf24@3914 66 * c-set-style: "BSD"
kaf24@3914 67 * c-basic-offset: 4
kaf24@3914 68 * tab-width: 4
kaf24@3914 69 * indent-tabs-mode: nil
kaf24@3988 70 * End:
kaf24@3914 71 */