diff options
Diffstat (limited to 'xen-2.4.16/include/xeno/time.h')
| -rw-r--r-- | xen-2.4.16/include/xeno/time.h | 61 |
1 files changed, 58 insertions, 3 deletions
diff --git a/xen-2.4.16/include/xeno/time.h b/xen-2.4.16/include/xeno/time.h index 33837c5009..5bb717fb2d 100644 --- a/xen-2.4.16/include/xeno/time.h +++ b/xen-2.4.16/include/xeno/time.h @@ -1,13 +1,61 @@ -/****************************************************************************** - * time.h +/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*- + **************************************************************************** + * (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 __XENO_TIME_H__ #define __XENO_TIME_H__ +#include <asm/ptrace.h> /* XXX Only used for do_timer which should be moved */ +#include <asm/time.h> /* pull in architecture specific time definition */ #include <xeno/types.h> -#include <asm/ptrace.h> +/* + * Cycle Counter Time (defined in asm/time.h) + */ + + +/* + * 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 + */ +#define NOW() ((s_time_t)get_s_time()) +#define SECONDS(_s) (((s_time_t)(_s)) * 1000000000UL ) +#define TENTHS(_ts) (((s_time_t)(_ts)) * 100000000UL ) +#define HUNDREDTHS(_hs) (((s_time_t)(_hs)) * 10000000UL ) +#define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000UL ) +#define MICROSECS(_us) (((s_time_t)(_us)) * 1000UL ) +#define Time_Max ((s_time_t) 0x7fffffffffffffffLL) +#define FOREVER Time_Max + +/* + * Wall Clock Time + */ struct timeval { long tv_sec; /* seconds */ long tv_usec; /* microseconds */ @@ -25,6 +73,13 @@ extern void get_fast_time(struct timeval *tv); extern void (*do_get_fast_time)(struct timeval *); #endif +/* + * Domain Virtual Time (defined in asm/time.h) + */ +/* XXX Interface for getting and setting still missing */ + + +/* XXX move this */ extern void do_timer(struct pt_regs *regs); #endif /* __XENO_TIME_H__ */ |