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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ia32mm |
29 | /** @addtogroup ia32mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <arch/mm/page.h> |
35 | #include <arch/mm/page.h> |
36 | #include <genarch/mm/page_pt.h> |
36 | #include <genarch/mm/page_pt.h> |
37 | #include <arch/mm/frame.h> |
37 | #include <arch/mm/frame.h> |
38 | #include <mm/frame.h> |
38 | #include <mm/frame.h> |
39 | #include <mm/page.h> |
39 | #include <mm/page.h> |
40 | #include <mm/as.h> |
40 | #include <mm/as.h> |
41 | #include <arch/types.h> |
41 | #include <arch/types.h> |
42 | #include <align.h> |
42 | #include <align.h> |
43 | #include <config.h> |
43 | #include <config.h> |
44 | #include <func.h> |
44 | #include <func.h> |
45 | #include <arch/interrupt.h> |
45 | #include <arch/interrupt.h> |
46 | #include <arch/asm.h> |
46 | #include <arch/asm.h> |
47 | #include <debug.h> |
47 | #include <debug.h> |
48 | #include <memstr.h> |
48 | #include <memstr.h> |
49 | #include <print.h> |
49 | #include <print.h> |
50 | #include <interrupt.h> |
50 | #include <interrupt.h> |
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. |
62 | */ |
62 | */ |
63 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
63 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
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 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_WRITE); |
88 | page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
- | 89 | } |
|
88 | 90 | ||
89 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
91 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
90 | 92 | ||
91 | return virtaddr; |
93 | return virtaddr; |
92 | } |
94 | } |
93 | 95 | ||
94 | void page_fault(int n, istate_t *istate) |
96 | void page_fault(int n __attribute__((unused)), istate_t *istate) |
95 | { |
97 | { |
96 | uintptr_t page; |
98 | uintptr_t page; |
97 | pf_access_t access; |
99 | pf_access_t access; |
98 | 100 | ||
99 | page = read_cr2(); |
101 | page = read_cr2(); |
100 | 102 | ||
101 | if (istate->error_word & PFERR_CODE_RSVD) |
103 | if (istate->error_word & PFERR_CODE_RSVD) |
102 | panic("Reserved bit set in page directory.\n"); |
104 | panic("Reserved bit set in page directory.\n"); |
103 | 105 | ||
104 | if (istate->error_word & PFERR_CODE_RW) |
106 | if (istate->error_word & PFERR_CODE_RW) |
105 | access = PF_ACCESS_WRITE; |
107 | access = PF_ACCESS_WRITE; |
106 | else |
108 | else |
107 | access = PF_ACCESS_READ; |
109 | access = PF_ACCESS_READ; |
108 | 110 | ||
109 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
111 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
110 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
112 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
111 | 113 | ||
112 | decode_istate(istate); |
114 | decode_istate(istate); |
113 | printf("page fault address: %#x\n", page); |
115 | printf("page fault address: %#lx\n", page); |
114 | panic("page fault\n"); |
116 | panic("page fault\n"); |
115 | } |
117 | } |
116 | } |
118 | } |
117 | 119 | ||
118 | /** @} |
120 | /** @} |
119 | */ |
121 | */ |
120 | 122 |