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phoenix |
/*
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000-2003 Silicon Graphics, Inc. All rights reserved.
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*/
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/*
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* This file contains definitions for accessing a platform supported high resolution
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* clock. The clock is monitonically increasing and can be accessed from any node
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* in the system. The clock is synchronized across nodes - all nodes see the
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* same value.
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*
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* RTC_COUNTER_ADDR - contains the address of the counter
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*
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* GET_RTC_COUNTER() - macro to read the value of the clock
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*
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* RTC_CYCLES_PER_SEC - clock frequency in ticks per second
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*
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*/
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#ifndef _ASM_IA64_SN_CLKSUPPORT_H
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#define _ASM_IA64_SN_CLKSUPPORT_H
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#include <linux/config.h>
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#include <asm/sn/arch.h>
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#include <asm/sn/addrs.h>
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typedef long clkreg_t;
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extern unsigned long sn_rtc_cycles_per_second;
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extern unsigned long sn_rtc_usec_per_cyc;
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extern unsigned long sn_rtc_per_itc;
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extern unsigned long sn_rtc_delta;
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#include <asm/sn/addrs.h>
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#include <asm/sn/sn2/addrs.h>
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#include <asm/sn/sn2/shubio.h>
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#include <asm/sn/sn2/shub_mmr.h>
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#define RTC_MASK SH_RTC_MASK
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#define RTC_COUNTER_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_COMPARE_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_COMPARE_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_INT_PENDING_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_INT_PENDING_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_INT_ENABLED_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define RTC_INT_ENABLED_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
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#define SN_RTC_PER_ITC_SHIFT 34
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#define GET_RTC_COUNTER() (*RTC_COUNTER_ADDR)
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#define rtc_time() GET_RTC_COUNTER()
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#define RTC_CYCLES_PER_SEC sn_rtc_cycles_per_second
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#endif /* _ASM_IA64_SN_CLKSUPPORT_H */
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