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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) 2000-2002 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
*
* GET_RTC_COUNTER() - macro to read the value of the clock
*
* RTC_CYCLES_PER_SEC - clock frequency in ticks per second
*
*/
#ifndef _ASM_IA64_SN_CLKSUPPORT_H
#define _ASM_IA64_SN_CLKSUPPORT_H
#include <linux/config.h>
#include <asm/sn/arch.h>
#include <asm/sn/addrs.h>
typedef long clkreg_t;
extern unsigned long sn_rtc_cycles_per_second;
#if defined(CONFIG_IA64_SGI_SN1)
#include <asm/sn/sn1/bedrock.h>
#include <asm/sn/sn1/hubpi_next.h>
extern nasid_t master_nasid;
#define RTC_MASK 0x007fffffffffffffUL
/* clocks are not synchronized yet on SN1 - used node 0 (problem if no NASID 0) */
#define RTC_COUNTER_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_COUNTER))
#define RTC_COMPARE_A_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_COMPARE_A))
#define RTC_COMPARE_B_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_COMPARE_B))
#define RTC_INT_PENDING_A_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_INT_PEND_A))
#define RTC_INT_PENDING_B_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_INT_PEND_B))
#define RTC_INT_ENABLED_A_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_INT_EN_A))
#define RTC_INT_ENABLED_B_ADDR ((clkreg_t*)REMOTE_HUB_ADDR(master_nasid, PI_RT_INT_EN_B))
#else /* !CONFIG_IA64_SGI_SN1 */
#include <asm/sn/addrs.h>
#include <asm/sn/sn2/addrs.h>
#include <asm/sn/sn2/shubio.h>
#include <asm/sn/sn2/shub_mmr.h>
#define RTC_MASK SH_RTC_MASK
#define RTC_COUNTER_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_COMPARE_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_COMPARE_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_INT_PENDING_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_INT_PENDING_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_INT_ENABLED_A_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#define RTC_INT_ENABLED_B_ADDR ((clkreg_t*)LOCAL_MMR_ADDR(SH_RTC))
#endif /* CONFIG_IA64_SGI_SN1 */
#define GET_RTC_COUNTER() (*RTC_COUNTER_ADDR)
#define rtc_time() GET_RTC_COUNTER()
#define RTC_CYCLES_PER_SEC sn_rtc_cycles_per_second
#endif /* _ASM_IA64_SN_CLKSUPPORT_H */
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