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rw_mmr.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) 2002-2006 Silicon Graphics, Inc. All Rights Reserved.
7  */
8 #ifndef _ASM_IA64_SN_RW_MMR_H
9 #define _ASM_IA64_SN_RW_MMR_H
10 
11 
12 /*
13  * This file that access MMRs via uncached physical addresses.
14  * pio_phys_read_mmr - read an MMR
15  * pio_phys_write_mmr - write an MMR
16  * pio_atomic_phys_write_mmrs - atomically write 1 or 2 MMRs with psr.ic=0
17  * Second MMR will be skipped if address is NULL
18  *
19  * Addresses passed to these routines should be uncached physical addresses
20  * ie., 0x80000....
21  */
22 
23 
24 extern long pio_phys_read_mmr(volatile long *mmr);
25 extern void pio_phys_write_mmr(volatile long *mmr, long val);
26 extern void pio_atomic_phys_write_mmrs(volatile long *mmr1, long val1, volatile long *mmr2, long val2);
27 
28 #endif /* _ASM_IA64_SN_RW_MMR_H */