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