| 1 | /*
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| 2 | * Copyright (C) 2006 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 |
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| 29 | #include <genarch/mm/page_ht.h>
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| 30 | #include <mm/page.h>
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| 31 | #include <mm/frame.h>
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| 32 | #include <arch/mm/asid.h>
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| 33 | #include <arch/types.h>
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| 34 | #include <typedefs.h>
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| 35 | #include <arch/asm.h>
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| 36 |
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| 37 | static void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root);
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| 38 | static pte_t *ht_mapping_find(__address page, asid_t asid, __address root);
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| 39 |
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| 40 | page_operations_t page_ht_operations = {
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| 41 | .mapping_insert = ht_mapping_insert,
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| 42 | .mapping_find = ht_mapping_find
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| 43 | };
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| 44 |
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| 45 | /** Map page to frame using page hash table.
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| 46 | *
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| 47 | * Map virtual address 'page' to physical address 'frame'
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| 48 | * using 'flags'.
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| 49 | *
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| 50 | * @param page Virtual address of the page to be mapped.
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| 51 | * @param asid Address space to which page belongs.
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| 52 | * @param frame Physical address of memory frame to which the mapping is done.
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| 53 | * @param flags Flags to be used for mapping.
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| 54 | * @param root Explicit PTL0 address.
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| 55 | */
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| 56 | void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root)
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| 57 | {
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| 58 | }
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| 59 |
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| 60 | /** Find mapping for virtual page in page hash table.
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| 61 | *
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| 62 | * Find mapping for virtual page.
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| 63 | *
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| 64 | * @param page Virtual page.
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| 65 | * @param asid Address space to wich page belongs.
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| 66 | * @param root PTL0 address if non-zero.
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| 67 | *
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| 68 | * @return NULL if there is no such mapping; entry from PTL3 describing the mapping otherwise.
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| 69 | */
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| 70 | pte_t *ht_mapping_find(__address page, asid_t asid, __address root)
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| 71 | {
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| 72 | return NULL;
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| 73 | }
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