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| Rev | Author | Line No. | Line |
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| 391 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __ia64_ASID_H__ |
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| 30 | #define __ia64_ASID_H__ |
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| 31 | |||
| 727 | jermar | 32 | #include <arch/types.h> |
| 391 | jermar | 33 | |
| 727 | jermar | 34 | typedef __u32 asid_t; |
| 391 | jermar | 35 | |
| 741 | jermar | 36 | /** |
| 37 | * This macro eliminates the stealing branch of asid_get(). |
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| 38 | */ |
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| 39 | #define ASID_STEALING_ENABLED 0 |
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| 40 | |||
| 740 | jermar | 41 | /** Number of ia64 RIDs (Region Identifiers) per kernel ASID. */ |
| 42 | #define RIDS_PER_ASID 7 |
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| 43 | #define RID_OVERFLOW 16777216 /* 2^24 */ |
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| 44 | |||
| 749 | jermar | 45 | #define ASID2RID(asid, vrn) (((asid)*RIDS_PER_ASID)+(vrn)) |
| 46 | #define RID2ASID(rid) ((rid)/RIDS_PER_ASID) |
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| 47 | |||
| 48 | typedef __u32 rid_t; |
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| 49 | |||
| 740 | jermar | 50 | /** |
| 741 | jermar | 51 | * This macro is needed only to compile the kernel. |
| 52 | * On ia64, its value is ignored. |
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| 727 | jermar | 53 | */ |
| 741 | jermar | 54 | #define ASID_MAX_ARCH 0 |
| 727 | jermar | 55 | |
| 740 | jermar | 56 | /** |
| 57 | * Value used to recognize the situation when all ASIDs were already allocated. |
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| 58 | */ |
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| 59 | #define ASID_OVERFLOW (RID_OVERFLOW/RIDS_PER_ASID) |
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| 60 | |||
| 747 | jermar | 61 | /** On ia64, this is no-op. */ |
| 730 | jermar | 62 | #define asid_put_arch(x) |
| 63 | |||
| 391 | jermar | 64 | #endif |