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| Rev | Author | Line No. | Line |
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| 1809 | decky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
| 1809 | decky | 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 | |||
| 1952 | jermar | 29 | /** @addtogroup ia32xen_mm |
| 1809 | decky | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #include <arch/mm/page.h> |
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| 36 | #include <genarch/mm/page_pt.h> |
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| 37 | #include <arch/mm/frame.h> |
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| 38 | #include <mm/frame.h> |
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| 39 | #include <mm/page.h> |
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| 40 | #include <mm/as.h> |
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| 41 | #include <arch/types.h> |
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| 42 | #include <align.h> |
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| 43 | #include <config.h> |
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| 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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| 47 | #include <debug.h> |
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| 48 | #include <memstr.h> |
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| 49 | #include <print.h> |
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| 50 | #include <interrupt.h> |
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| 51 | |||
| 52 | void page_arch_init(void) |
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| 53 | { |
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| 54 | if (config.cpu_active == 1) { |
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| 55 | page_mapping_operations = &pt_mapping_operations; |
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| 1821 | decky | 56 | AS_KERNEL->page_table = (pte_t *) KA2PA(start_info.ptl0); |
| 57 | } else |
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| 58 | SET_PTL0_ADDRESS_ARCH(AS_KERNEL->page_table); |
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| 1809 | decky | 59 | } |
| 60 | |||
| 61 | void page_fault(int n, istate_t *istate) |
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| 62 | { |
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| 1816 | decky | 63 | uintptr_t page; |
| 1809 | decky | 64 | pf_access_t access; |
| 65 | |||
| 1816 | decky | 66 | page = read_cr2(); |
| 67 | |||
| 68 | if (istate->error_word & PFERR_CODE_RSVD) |
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| 1809 | decky | 69 | panic("Reserved bit set in page directory.\n"); |
| 1816 | decky | 70 | |
| 1809 | decky | 71 | if (istate->error_word & PFERR_CODE_RW) |
| 72 | access = PF_ACCESS_WRITE; |
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| 73 | else |
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| 74 | access = PF_ACCESS_READ; |
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| 1816 | decky | 75 | |
| 76 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
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| 1809 | decky | 77 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
| 1816 | decky | 78 | |
| 1959 | decky | 79 | decode_istate(istate); |
| 1816 | decky | 80 | printf("page fault address: %#x\n", page); |
| 81 | panic("page fault\n"); |
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| 82 | } |
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| 1809 | decky | 83 | } |
| 84 | |||
| 85 | /** @} |
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| 86 | */ |