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| Rev | Author | Line No. | Line |
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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 <arch/types.h> |
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| 30 | #include <config.h> |
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| 31 | #include <func.h> |
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| 32 | #include <mm/frame.h> |
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| 33 | #include <mm/page.h> |
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| 34 | #include <arch/mm/page.h> |
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| 35 | #include <arch/interrupt.h> |
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| 36 | #include <arch/asm.h> |
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| 37 | #include <synch/spinlock.h> |
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| 106 | jermar | 38 | #include <debug.h> |
| 195 | vana | 39 | #include <memstr.h> |
| 235 | decky | 40 | #include <print.h> |
| 1 | jermar | 41 | |
| 42 | __address bootstrap_dba; |
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| 43 | |||
| 44 | void page_arch_init(void) |
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| 45 | { |
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| 46 | __address dba; |
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| 47 | __u32 i; |
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| 48 | |||
| 49 | if (config.cpu_active == 1) { |
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| 106 | jermar | 50 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
| 1 | jermar | 51 | memsetb(dba, PAGE_SIZE, 0); |
| 125 | jermar | 52 | |
| 1 | jermar | 53 | bootstrap_dba = dba; |
| 235 | decky | 54 | |
| 1 | jermar | 55 | /* |
| 116 | jermar | 56 | * Identity mapping for all frames. |
| 57 | * PA2KA(identity) mapping for all frames. |
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| 1 | jermar | 58 | */ |
| 116 | jermar | 59 | for (i = 0; i < frames; i++) { |
| 113 | jermar | 60 | map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE, KA2PA(dba)); |
| 61 | map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE, KA2PA(dba)); |
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| 105 | jermar | 62 | } |
| 1 | jermar | 63 | |
| 64 | trap_register(14, page_fault); |
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| 115 | jermar | 65 | write_cr3(KA2PA(dba)); |
| 1 | jermar | 66 | } |
| 67 | else { |
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| 68 | /* |
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| 69 | * Application processors need to create their own view of the |
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| 70 | * virtual address space. Because of that, each AP copies |
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| 71 | * already-initialized paging information from the bootstrap |
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| 72 | * processor and adjusts it to fulfill its needs. |
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| 73 | */ |
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| 74 | |||
| 75 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
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| 205 | jermar | 76 | memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
| 115 | jermar | 77 | write_cr3(KA2PA(dba)); |
| 1 | jermar | 78 | } |
| 79 | |||
| 80 | paging_on(); |
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| 81 | } |