1. 根目录:
2. arch
3. ia64
4. include
5. asm
6. sn
7. rw_mmr.h

/*
 * 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) 2002-2006 Silicon Graphics, Inc.  All Rights Reserved.
 */
#ifndef _ASM_IA64_SN_RW_MMR_H
#define _ASM_IA64_SN_RW_MMR_H


/*
 * This file that access MMRs via uncached physical addresses.
 * 	pio_phys_read_mmr  - read an MMR
 * 	pio_phys_write_mmr - write an MMR
 * 	pio_atomic_phys_write_mmrs - atomically write 1 or 2 MMRs with psr.ic=0
 *		Second MMR will be skipped if address is NULL
 *
 * Addresses passed to these routines should be uncached physical addresses
 * ie., 0x80000....
 */


extern long pio_phys_read_mmr(volatile long *mmr); 
extern void pio_phys_write_mmr(volatile long *mmr, long val);
extern void pio_atomic_phys_write_mmrs(volatile long *mmr1, long val1, volatile long *mmr2, long val2); 

#endif /* _ASM_IA64_SN_RW_MMR_H */