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kernel/linux-rt-4.4.41/arch/ia64/include/asm/sn/clksupport.h 844 Bytes
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  /*
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
   */
  
  /*
   * This file contains definitions for accessing a platform supported high resolution
   * clock. The clock is monitonically increasing and can be accessed from any node
   * in the system. The clock is synchronized across nodes - all nodes see the
   * same value.
   * 
   *	RTC_COUNTER_ADDR - contains the address of the counter 
   *
   */
  
  #ifndef _ASM_IA64_SN_CLKSUPPORT_H
  #define _ASM_IA64_SN_CLKSUPPORT_H
  
  extern unsigned long sn_rtc_cycles_per_second;
  
  #define RTC_COUNTER_ADDR	((long *)LOCAL_MMR_ADDR(SH_RTC))
  
  #define rtc_time()		(*RTC_COUNTER_ADDR)
  
  #endif /* _ASM_IA64_SN_CLKSUPPORT_H */