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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 <mm/page.h> |
29 | #include <mm/page.h> |
30 | #include <mm/frame.h> |
30 | #include <mm/frame.h> |
31 | #include <arch/mm/page.h> |
31 | #include <arch/mm/page.h> |
32 | #include <arch/interrupt.h> |
32 | #include <arch/interrupt.h> |
33 | #include <arch/asm.h> |
33 | #include <arch/asm.h> |
34 | #include <config.h> |
34 | #include <config.h> |
35 | 35 | ||
36 | #include <memstr.h> |
36 | #include <memstr.h> |
37 | 37 | ||
38 | 38 | ||
39 | __address bootstrap_dba; |
39 | __address bootstrap_dba; |
40 | 40 | ||
41 | void page_arch_init(void) |
41 | void page_arch_init(void) |
42 | { |
42 | { |
43 | __address dba; |
43 | __address dba; |
44 | count_t i; |
44 | count_t i; |
45 | 45 | ||
46 | if (config.cpu_active == 1) { |
46 | if (config.cpu_active == 1) { |
47 | dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
47 | dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
48 | memsetb(dba, PAGE_SIZE, 0); |
48 | memsetb(dba, PAGE_SIZE, 0); |
49 | 49 | ||
50 | bootstrap_dba = dba; |
50 | bootstrap_dba = dba; |
51 | 51 | ||
52 | /* |
52 | /* |
53 | * PA2KA(identity) mapping for all frames. |
53 | * PA2KA(identity) mapping for all frames. |
54 | */ |
54 | */ |
55 | for (i = 0; i < config.memory_size/FRAME_SIZE; i++) { |
55 | for (i = 0; i < config.memory_size/FRAME_SIZE; i++) { |
56 | page_mapping_insert(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
56 | page_mapping_insert(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
57 | } |
57 | } |
58 | 58 | ||
59 | trap_register(14, page_fault); |
59 | trap_register(14, page_fault); |
60 | write_cr3(KA2PA(dba)); |
60 | write_cr3(KA2PA(dba)); |
61 | } |
61 | } |
62 | else { |
62 | else { |
63 | /* |
63 | /* |
64 | * Application processors need to create their own view of the |
64 | * Application processors need to create their own view of the |
65 | * virtual address space. Because of that, each AP copies |
65 | * virtual address space. Because of that, each AP copies |
66 | * already-initialized paging information from the bootstrap |
66 | * already-initialized paging information from the bootstrap |
67 | * processor and adjusts it to fulfill its needs. |
67 | * processor and adjusts it to fulfill its needs. |
68 | */ |
68 | */ |
69 | 69 | ||
70 | dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
70 | dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
71 | memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
71 | memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
72 | write_cr3(KA2PA(dba)); |
72 | write_cr3(KA2PA(dba)); |
73 | } |
73 | } |
74 | } |
74 | } |
75 | 75 |