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391 jermar 1
/*
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 * Copyright (c) 2005 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup ia64mm 
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_ia64_ASID_H_
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#define KERN_ia64_ASID_H_
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#ifndef __ASM__
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#include <arch/types.h>
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typedef uint16_t asid_t;
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typedef uint32_t rid_t;
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#endif  /* __ASM__ */
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/**
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 * Number of ia64 RIDs (Region Identifiers) per kernel ASID.
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 * Note that some architectures may support more bits,
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 * but those extra bits are not used by the kernel.
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 */
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#define RIDS_PER_ASID       7
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#define RID_MAX         262143      /* 2^18 - 1 */
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#define RID_KERNEL      0
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#define RID_INVALID     1
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#define ASID2RID(asid, vrn) (((asid)>RIDS_PER_ASID)?(((asid)*RIDS_PER_ASID)+(vrn)):(asid))
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#define RID2ASID(rid)       ((rid)/RIDS_PER_ASID)
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#define ASID_MAX_ARCH       (RID_MAX/RIDS_PER_ASID)
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#endif
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/** @}
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 */