Rev 2787 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2787 | Rev 4377 | ||
|---|---|---|---|
| Line 51... | Line 51... | ||
| 51 | 51 | ||
| 52 | void page_arch_init(void) |
52 | void page_arch_init(void) |
| 53 | { |
53 | { |
| 54 | uintptr_t cur; |
54 | uintptr_t cur; |
| 55 | int flags; |
55 | int flags; |
| 56 | 56 | ||
| 57 | if (config.cpu_active == 1) { |
57 | if (config.cpu_active == 1) { |
| 58 | page_mapping_operations = &pt_mapping_operations; |
58 | page_mapping_operations = &pt_mapping_operations; |
| 59 | 59 | ||
| 60 | /* |
60 | /* |
| 61 | * PA2KA(identity) mapping for all frames until last_frame. |
61 | * PA2KA(identity) mapping for all frames until last_frame. |
| Line 64... | Line 64... | ||
| 64 | flags = PAGE_CACHEABLE | PAGE_WRITE; |
64 | flags = PAGE_CACHEABLE | PAGE_WRITE; |
| 65 | if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
65 | if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
| 66 | flags |= PAGE_GLOBAL; |
66 | flags |= PAGE_GLOBAL; |
| 67 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
67 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
| 68 | } |
68 | } |
| 69 | 69 | ||
| 70 | exc_register(14, "page_fault", (iroutine) page_fault); |
70 | exc_register(14, "page_fault", (iroutine) page_fault); |
| 71 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
71 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
| 72 | } else |
72 | } else |
| 73 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
73 | write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); |
| 74 | 74 | ||
| 75 | paging_on(); |
75 | paging_on(); |
| 76 | } |
76 | } |
| 77 | 77 | ||
| 78 | 78 | ||
| 79 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
79 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
| 80 | { |
80 | { |
| 81 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
81 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
| 82 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
82 | panic("Unable to map physical memory %p (%d bytes).", physaddr, size) |
| 83 | 83 | ||
| 84 | uintptr_t virtaddr = PA2KA(last_frame); |
84 | uintptr_t virtaddr = PA2KA(last_frame); |
| 85 | pfn_t i; |
85 | pfn_t i; |
| 86 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
86 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
| 87 | uintptr_t addr = PFN2ADDR(i); |
87 | uintptr_t addr = PFN2ADDR(i); |
| Line 99... | Line 99... | ||
| 99 | pf_access_t access; |
99 | pf_access_t access; |
| 100 | 100 | ||
| 101 | page = read_cr2(); |
101 | page = read_cr2(); |
| 102 | 102 | ||
| 103 | if (istate->error_word & PFERR_CODE_RSVD) |
103 | if (istate->error_word & PFERR_CODE_RSVD) |
| 104 | panic("Reserved bit set in page directory.\n"); |
104 | panic("Reserved bit set in page directory."); |
| 105 | 105 | ||
| 106 | if (istate->error_word & PFERR_CODE_RW) |
106 | if (istate->error_word & PFERR_CODE_RW) |
| 107 | access = PF_ACCESS_WRITE; |
107 | access = PF_ACCESS_WRITE; |
| 108 | else |
108 | else |
| 109 | access = PF_ACCESS_READ; |
109 | access = PF_ACCESS_READ; |
| 110 | 110 | ||
| 111 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
111 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
| 112 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
112 | fault_if_from_uspace(istate, "Page fault: %#x.", page); |
| 113 | 113 | ||
| 114 | decode_istate(istate); |
114 | decode_istate(istate); |
| 115 | printf("page fault address: %#lx\n", page); |
115 | printf("page fault address: %#lx\n", page); |
| 116 | panic("page fault\n"); |
116 | panic("Page fault."); |
| 117 | } |
117 | } |
| 118 | } |
118 | } |
| 119 | 119 | ||
| 120 | /** @} |
120 | /** @} |
| 121 | */ |
121 | */ |