arch/ia64/include/asm/sn/rw_mmr.h

   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 */