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126 | decky | 1 | /* |
127 | jermar | 2 | * Copyright (C) 2005 Martin Decky |
126 | decky | 3 | * All rights reserved. |
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 | #include <arch.h> |
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30 | #include <memstr.h> |
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31 | |||
32 | /**< Array of threads that have currently some ASID assigned, |
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33 | NULL means no thread have ASID with number of that index assigned */ |
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34 | struct thread * asids[256]; |
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35 | int last_asid; /**< The number of last assigned ASID */ |
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36 | int asid_bitmap[32]; /**< Bitmap of ASIDs currently in TLB */ |
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37 | |||
38 | |||
39 | /** Cleanup asid_bitmap |
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40 | * |
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41 | */ |
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42 | void asid_bitmap_reset() |
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43 | { |
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44 | memsetb(asid_bitmap, sizeof(asid_bitmap), 0); |
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45 | } |
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46 | |||
47 | |||
48 | /** Initialize manipulating with ASIDs |
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49 | * |
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50 | */ |
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51 | void init_asids() |
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52 | { |
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53 | memsetb(asids, sizeof(asids), 0); |
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54 | asid_bitmap_reset(); |
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55 | last_asid = 0; |
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56 | } |