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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 <config.h> |
37 | #include <config.h> |
| 37 | #include <func.h> |
38 | #include <func.h> |
| 38 | #include <arch/interrupt.h> |
39 | #include <arch/interrupt.h> |
| 39 | #include <arch/asm.h> |
40 | #include <arch/asm.h> |
| 40 | #include <debug.h> |
41 | #include <debug.h> |
| 41 | #include <memstr.h> |
42 | #include <memstr.h> |
| 42 | #include <print.h> |
43 | #include <print.h> |
| 43 | #include <interrupt.h> |
44 | #include <interrupt.h> |
| 44 | 45 | ||
| - | 46 | ||
| 45 | void page_arch_init(void) |
47 | void page_arch_init(void) |
| 46 | { |
48 | { |
| 47 | __address cur; |
49 | __address cur; |
| 48 | int flags; |
50 | int flags; |
| 49 | 51 | ||
| 50 | if (config.cpu_active == 1) { |
52 | if (config.cpu_active == 1) { |
| 51 | page_mapping_operations = &pt_mapping_operations; |
53 | page_mapping_operations = &pt_mapping_operations; |
| 52 | 54 | ||
| 53 | /* |
55 | /* |
| 54 | * PA2KA(identity) mapping for all frames until last_frame. |
56 | * PA2KA(identity) mapping for all frames until last_frame. |
| 55 | */ |
57 | */ |
| 56 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
58 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
| 57 | flags = PAGE_CACHEABLE; |
59 | flags = PAGE_CACHEABLE; |
| 58 | if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
60 | if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
| 59 | flags |= PAGE_GLOBAL; |
61 | flags |= PAGE_GLOBAL; |
| 60 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
62 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
| 61 | } |
63 | } |
| 62 | 64 | ||
| 63 | exc_register(14, "page_fault", (iroutine) page_fault); |
65 | exc_register(14, "page_fault", (iroutine) page_fault); |
| 64 | write_cr3((__address) AS_KERNEL->page_table); |
66 | write_cr3((__address) AS_KERNEL->page_table); |
| 65 | } |
67 | } |
| 66 | else { |
68 | else { |
| 67 | write_cr3((__address) AS_KERNEL->page_table); |
69 | write_cr3((__address) AS_KERNEL->page_table); |
| 68 | } |
70 | } |
| 69 | 71 | ||
| 70 | paging_on(); |
72 | paging_on(); |
| 71 | } |
73 | } |
| - | 74 | ||
| - | 75 | ||
| - | 76 | __address hw_map(__address physaddr, size_t size) |
|
| - | 77 | { |
|
| - | 78 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
|
| - | 79 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
|
| - | 80 | ||
| - | 81 | __address virtaddr = PA2KA(last_frame); |
|
| - | 82 | pfn_t i; |
|
| - | 83 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) |
|
| - | 84 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE); |
|
| - | 85 | ||
| - | 86 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
|
| - | 87 | ||
| - | 88 | return virtaddr; |
|
| - | 89 | } |
|
| 72 | 90 | ||