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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/page.h> |
32 | #include <mm/page.h> |
33 | #include <mm/frame.h> |
33 | #include <mm/frame.h> |
34 | #include <mm/as.h> |
34 | #include <mm/as.h> |
35 | #include <arch/interrupt.h> |
35 | #include <arch/interrupt.h> |
36 | #include <arch/asm.h> |
36 | #include <arch/asm.h> |
37 | #include <config.h> |
37 | #include <config.h> |
38 | #include <memstr.h> |
38 | #include <memstr.h> |
39 | #include <interrupt.h> |
39 | #include <interrupt.h> |
40 | 40 | ||
41 | static __address bootstrap_dba; |
- | |
42 | - | ||
43 | void page_arch_init(void) |
41 | void page_arch_init(void) |
44 | { |
42 | { |
45 | __address dba; |
- | |
46 | __address cur; |
43 | __address cur; |
47 | 44 | ||
48 | if (config.cpu_active == 1) { |
45 | if (config.cpu_active == 1) { |
49 | page_operations = &page_pt_operations; |
46 | page_operations = &page_pt_operations; |
50 | 47 | ||
51 | dba = frame_alloc(FRAME_KA | FRAME_PANIC, ONE_FRAME, NULL); |
- | |
52 | memsetb(dba, PAGE_SIZE, 0); |
- | |
53 | - | ||
54 | bootstrap_dba = dba; |
- | |
55 | - | ||
56 | /* |
48 | /* |
57 | * PA2KA(identity) mapping for all frames. |
49 | * PA2KA(identity) mapping for all frames. |
58 | */ |
50 | */ |
59 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
51 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
60 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
52 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, PAGE_CACHEABLE | PAGE_EXEC); |
61 | } |
53 | } |
62 | 54 | ||
63 | exc_register(14, "page_fault", page_fault); |
55 | exc_register(14, "page_fault", page_fault); |
64 | write_cr3(KA2PA(dba)); |
56 | write_cr3((__address) AS_KERNEL->page_table); |
65 | } |
57 | } |
66 | else { |
58 | else { |
67 | write_cr3(KA2PA(bootstrap_dba)); |
59 | write_cr3((__address) AS_KERNEL->page_table); |
68 | } |
60 | } |
69 | } |
61 | } |
70 | 62 |