Rev 703 | Rev 756 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | jermar | 1 | /* |
| 703 | jermar | 2 | * Copyright (C) 2001-2006 Jakub Jermar |
| 1 | jermar | 3 | * All rights reserved. |
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 703 | jermar | 29 | /* |
| 30 | * Virtual Address Translation subsystem. |
||
| 31 | */ |
||
| 32 | |||
| 1 | jermar | 33 | #include <mm/page.h> |
| 687 | jermar | 34 | #include <arch/mm/page.h> |
| 35 | #include <arch/mm/asid.h> |
||
| 755 | jermar | 36 | #include <mm/as.h> |
| 120 | jermar | 37 | #include <mm/frame.h> |
| 116 | jermar | 38 | #include <arch/types.h> |
| 39 | #include <typedefs.h> |
||
| 120 | jermar | 40 | #include <arch/asm.h> |
| 195 | vana | 41 | #include <memstr.h> |
| 684 | jermar | 42 | #include <debug.h> |
| 687 | jermar | 43 | #include <arch.h> |
| 1 | jermar | 44 | |
| 684 | jermar | 45 | /** Virtual operations for page subsystem. */ |
| 46 | page_operations_t *page_operations = NULL; |
||
| 47 | |||
| 1 | jermar | 48 | void page_init(void) |
| 226 | palkovsky | 49 | { |
| 23 | jermar | 50 | page_arch_init(); |
| 755 | jermar | 51 | page_mapping_insert(AS_KERNEL, 0x0, 0x0, PAGE_NOT_PRESENT, 0); |
| 1 | jermar | 52 | } |
| 116 | jermar | 53 | |
| 54 | /** Map memory structure |
||
| 55 | * |
||
| 56 | * Identity-map memory structure |
||
| 57 | * considering possible crossings |
||
| 58 | * of page boundaries. |
||
| 59 | * |
||
| 60 | * @param s Address of the structure. |
||
| 61 | * @param size Size of the structure. |
||
| 62 | */ |
||
| 63 | void map_structure(__address s, size_t size) |
||
| 64 | { |
||
| 65 | int i, cnt, length; |
||
| 66 | |||
| 226 | palkovsky | 67 | length = size + (s - (s & ~(PAGE_SIZE-1))); |
| 125 | jermar | 68 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
| 116 | jermar | 69 | |
| 125 | jermar | 70 | for (i = 0; i < cnt; i++) |
| 755 | jermar | 71 | page_mapping_insert(AS_KERNEL, s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
| 116 | jermar | 72 | |
| 73 | } |
||
| 120 | jermar | 74 | |
| 75 | /** Map page to frame |
||
| 76 | * |
||
| 77 | * Map virtual address 'page' to physical address 'frame' |
||
| 78 | * using 'flags'. Allocate and setup any missing page tables. |
||
| 79 | * |
||
| 755 | jermar | 80 | * @param as Address space to wich page belongs. Must be locked prior the call. |
| 120 | jermar | 81 | * @param page Virtual address of the page to be mapped. |
| 82 | * @param frame Physical address of memory frame to which the mapping is done. |
||
| 83 | * @param flags Flags to be used for mapping. |
||
| 84 | * @param root Explicit PTL0 address. |
||
| 85 | */ |
||
| 755 | jermar | 86 | void page_mapping_insert(as_t *as, __address page, __address frame, int flags, __address root) |
| 120 | jermar | 87 | { |
| 684 | jermar | 88 | ASSERT(page_operations); |
| 89 | ASSERT(page_operations->mapping_insert); |
||
| 90 | |||
| 755 | jermar | 91 | page_operations->mapping_insert(as, page, frame, flags, root); |
| 120 | jermar | 92 | } |
| 391 | jermar | 93 | |
| 94 | /** Find mapping for virtual page |
||
| 95 | * |
||
| 96 | * Find mapping for virtual page. |
||
| 97 | * |
||
| 755 | jermar | 98 | * @param as Address space to wich page belongs must be locked prior the call. |
| 391 | jermar | 99 | * @param page Virtual page. |
| 100 | * @param root PTL0 address if non-zero. |
||
| 101 | * |
||
| 699 | jermar | 102 | * @return NULL if there is no such mapping; requested mapping otherwise. |
| 391 | jermar | 103 | */ |
| 755 | jermar | 104 | pte_t *page_mapping_find(as_t *as, __address page, __address root) |
| 391 | jermar | 105 | { |
| 684 | jermar | 106 | ASSERT(page_operations); |
| 107 | ASSERT(page_operations->mapping_find); |
||
| 391 | jermar | 108 | |
| 755 | jermar | 109 | return page_operations->mapping_find(as, page, root); |
| 391 | jermar | 110 | } |