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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 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 | #include <mm/page.h> |
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30 | #include <arch/mm/page.h> |
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116 | jermar | 31 | #include <arch/types.h> |
32 | #include <typedefs.h> |
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1 | jermar | 33 | |
34 | void page_init(void) |
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35 | { |
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23 | jermar | 36 | page_arch_init(); |
1 | jermar | 37 | map_page_to_frame(0x0, 0x0, PAGE_NOT_PRESENT, 0); |
38 | } |
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116 | jermar | 39 | |
40 | /** Map memory structure |
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41 | * |
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42 | * Identity-map memory structure |
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43 | * considering possible crossings |
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44 | * of page boundaries. |
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45 | * |
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46 | * @param s Address of the structure. |
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47 | * @param size Size of the structure. |
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48 | */ |
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49 | void map_structure(__address s, size_t size) |
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50 | { |
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51 | int i, cnt, length; |
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52 | |||
53 | /* TODO: implement portable way of computing page address from address */ |
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54 | length = size + (s - (s & 0xfffff000)); |
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55 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
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56 | |||
57 | for (i = 0; i < cnt; i++) |
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58 | map_page_to_frame(s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
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59 | |||
60 | } |