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| Rev | Author | Line No. | Line |
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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; |
| 4377 | svoboda | 56 | |
| 1 | jermar | 57 | if (config.cpu_active == 1) { |
| 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) { |
| 2222 | decky | 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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| 4377 | svoboda | 69 | |
| 958 | jermar | 70 | exc_register(14, "page_fault", (iroutine) page_fault); |
| 2106 | jermar | 71 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
| 2222 | decky | 72 | } else |
| 2106 | jermar | 73 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
| 4377 | svoboda | 74 | |
| 1 | jermar | 75 | paging_on(); |
| 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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| 4377 | svoboda | 82 | panic("Unable to map physical memory %p (%d bytes).", physaddr, size) |
| 1382 | decky | 83 | |
| 1780 | jermar | 84 | uintptr_t virtaddr = PA2KA(last_frame); |
| 1382 | decky | 85 | pfn_t i; |
| 2441 | decky | 86 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
| 87 | uintptr_t addr = PFN2ADDR(i); |
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| 88 | page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
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| 89 | } |
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| 1382 | decky | 90 | |
| 91 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
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| 92 | |||
| 93 | return virtaddr; |
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| 94 | } |
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| 1411 | jermar | 95 | |
| 2441 | decky | 96 | void page_fault(int n __attribute__((unused)), istate_t *istate) |
| 1411 | jermar | 97 | { |
| 2222 | decky | 98 | uintptr_t page; |
| 1411 | jermar | 99 | pf_access_t access; |
| 100 | |||
| 2222 | decky | 101 | page = read_cr2(); |
| 1411 | jermar | 102 | |
| 2222 | decky | 103 | if (istate->error_word & PFERR_CODE_RSVD) |
| 4377 | svoboda | 104 | panic("Reserved bit set in page directory."); |
| 105 | |||
| 1411 | jermar | 106 | if (istate->error_word & PFERR_CODE_RW) |
| 107 | access = PF_ACCESS_WRITE; |
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| 108 | else |
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| 109 | access = PF_ACCESS_READ; |
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| 2222 | decky | 110 | |
| 111 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
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| 4377 | svoboda | 112 | fault_if_from_uspace(istate, "Page fault: %#x.", page); |
| 2222 | decky | 113 | |
| 114 | decode_istate(istate); |
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| 2441 | decky | 115 | printf("page fault address: %#lx\n", page); |
| 4377 | svoboda | 116 | panic("Page fault."); |
| 2222 | decky | 117 | } |
| 1411 | jermar | 118 | } |
| 1702 | cejka | 119 | |
| 1888 | jermar | 120 | /** @} |
| 1702 | cejka | 121 | */ |