Linux Kernel  3.7.1
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clksupport.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
7  */
8 
9 /*
10  * This file contains definitions for accessing a platform supported high resolution
11  * clock. The clock is monitonically increasing and can be accessed from any node
12  * in the system. The clock is synchronized across nodes - all nodes see the
13  * same value.
14  *
15  * RTC_COUNTER_ADDR - contains the address of the counter
16  *
17  */
18 
19 #ifndef _ASM_IA64_SN_CLKSUPPORT_H
20 #define _ASM_IA64_SN_CLKSUPPORT_H
21 
22 extern unsigned long sn_rtc_cycles_per_second;
23 
24 #define RTC_COUNTER_ADDR ((long *)LOCAL_MMR_ADDR(SH_RTC))
25 
26 #define rtc_time() (*RTC_COUNTER_ADDR)
27 
28 #endif /* _ASM_IA64_SN_CLKSUPPORT_H */