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| Rev | Author | Line No. | Line |
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| 219 | palkovsky | 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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| 226 | palkovsky | 30 | #include <mm/frame.h> |
| 219 | palkovsky | 31 | #include <arch/mm/page.h> |
| 226 | palkovsky | 32 | #include <arch/interrupt.h> |
| 33 | #include <arch/asm.h> |
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| 34 | #include <config.h> |
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| 219 | palkovsky | 35 | |
| 226 | palkovsky | 36 | #include <memstr.h> |
| 37 | |||
| 38 | |||
| 39 | __address bootstrap_dba; |
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| 40 | |||
| 219 | palkovsky | 41 | void page_arch_init(void) |
| 42 | { |
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| 226 | palkovsky | 43 | __address dba; |
| 44 | count_t i; |
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| 45 | |||
| 46 | if (config.cpu_active == 1) { |
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| 47 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
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| 48 | memsetb(dba, PAGE_SIZE, 0); |
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| 49 | |||
| 50 | bootstrap_dba = dba; |
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| 51 | |||
| 52 | /* |
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| 53 | * Identity mapping for all frames. |
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| 54 | * PA2KA(identity) mapping for all frames. |
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| 55 | */ |
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| 56 | for (i = 0; i < frames; i++) { |
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| 57 | map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
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| 58 | map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
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| 59 | } |
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| 60 | |||
| 61 | trap_register(14, page_fault); |
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| 62 | write_cr3(KA2PA(dba)); |
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| 63 | } |
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| 64 | else { |
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| 65 | /* |
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| 66 | * Application processors need to create their own view of the |
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| 67 | * virtual address space. Because of that, each AP copies |
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| 68 | * already-initialized paging information from the bootstrap |
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| 69 | * processor and adjusts it to fulfill its needs. |
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| 70 | */ |
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| 71 | |||
| 72 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
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| 73 | memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
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| 74 | write_cr3(KA2PA(dba)); |
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| 75 | } |
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| 219 | palkovsky | 76 | } |