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1 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
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 | |||
1888 | jermar | 29 | /** @addtogroup ia32mm |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
540 | jermar | 35 | #include <arch/mm/page.h> |
684 | jermar | 36 | #include <genarch/mm/page_pt.h> |
540 | jermar | 37 | #include <arch/mm/frame.h> |
38 | #include <mm/frame.h> |
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39 | #include <mm/page.h> |
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755 | jermar | 40 | #include <mm/as.h> |
1 | jermar | 41 | #include <arch/types.h> |
1382 | decky | 42 | #include <align.h> |
1 | jermar | 43 | #include <config.h> |
44 | #include <func.h> |
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45 | #include <arch/interrupt.h> |
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46 | #include <arch/asm.h> |
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106 | jermar | 47 | #include <debug.h> |
195 | vana | 48 | #include <memstr.h> |
235 | decky | 49 | #include <print.h> |
576 | palkovsky | 50 | #include <interrupt.h> |
1 | jermar | 51 | |
52 | void page_arch_init(void) |
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53 | { |
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1780 | jermar | 54 | uintptr_t cur; |
825 | jermar | 55 | int flags; |
1 | jermar | 56 | |
57 | if (config.cpu_active == 1) { |
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793 | jermar | 58 | page_mapping_operations = &pt_mapping_operations; |
684 | jermar | 59 | |
1 | jermar | 60 | /* |
540 | jermar | 61 | * PA2KA(identity) mapping for all frames until last_frame. |
1 | jermar | 62 | */ |
825 | jermar | 63 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
2307 | hudecek | 64 | flags = PAGE_CACHEABLE | PAGE_WRITE; |
825 | jermar | 65 | if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
66 | flags |= PAGE_GLOBAL; |
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67 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
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68 | } |
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1 | jermar | 69 | |
958 | jermar | 70 | exc_register(14, "page_fault", (iroutine) page_fault); |
2106 | jermar | 71 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
2307 | hudecek | 72 | } else |
2106 | jermar | 73 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
1 | jermar | 74 | |
75 | paging_on(); |
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76 | } |
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1382 | decky | 77 | |
78 | |||
1780 | jermar | 79 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
1382 | decky | 80 | { |
81 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
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82 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
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83 | |||
1780 | jermar | 84 | uintptr_t virtaddr = PA2KA(last_frame); |
1382 | decky | 85 | pfn_t i; |
86 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) |
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2307 | hudecek | 87 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_WRITE); |
1382 | decky | 88 | |
89 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
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90 | |||
91 | return virtaddr; |
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92 | } |
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1411 | jermar | 93 | |
94 | void page_fault(int n, istate_t *istate) |
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95 | { |
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2307 | hudecek | 96 | uintptr_t page; |
1411 | jermar | 97 | pf_access_t access; |
98 | |||
2307 | hudecek | 99 | page = read_cr2(); |
1411 | jermar | 100 | |
2307 | hudecek | 101 | if (istate->error_word & PFERR_CODE_RSVD) |
1411 | jermar | 102 | panic("Reserved bit set in page directory.\n"); |
103 | |||
104 | if (istate->error_word & PFERR_CODE_RW) |
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105 | access = PF_ACCESS_WRITE; |
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106 | else |
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107 | access = PF_ACCESS_READ; |
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2307 | hudecek | 108 | |
109 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
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1595 | palkovsky | 110 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
2307 | hudecek | 111 | |
112 | decode_istate(istate); |
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113 | printf("page fault address: %#x\n", page); |
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114 | panic("page fault\n"); |
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115 | } |
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1411 | jermar | 116 | } |
1702 | cejka | 117 | |
1888 | jermar | 118 | /** @} |
1702 | cejka | 119 | */ |