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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 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 <genarch/mm/page_pt.h> |
29 | #include <genarch/mm/page_pt.h> |
30 | #include <mm/page.h> |
30 | #include <mm/page.h> |
31 | #include <mm/frame.h> |
31 | #include <mm/frame.h> |
32 | #include <mm/as.h> |
32 | #include <mm/as.h> |
33 | #include <arch/mm/page.h> |
33 | #include <arch/mm/page.h> |
34 | #include <arch/mm/as.h> |
34 | #include <arch/mm/as.h> |
35 | #include <arch/types.h> |
35 | #include <arch/types.h> |
36 | #include <typedefs.h> |
36 | #include <typedefs.h> |
37 | #include <memstr.h> |
37 | #include <memstr.h> |
38 | #include <arch.h> |
38 | #include <arch.h> |
39 | 39 | ||
40 | static pte_t *ptl0_create(int flags); |
40 | static pte_t *ptl0_create(int flags); |
41 | 41 | ||
- | 42 | static void pt_lock(as_t *as, bool lock); |
|
- | 43 | static void pt_unlock(as_t *as, bool unlock); |
|
- | 44 | ||
42 | as_operations_t as_pt_operations = { |
45 | as_operations_t as_pt_operations = { |
43 | .page_table_create = ptl0_create |
46 | .page_table_create = ptl0_create, |
- | 47 | .page_table_lock = pt_lock, |
|
- | 48 | .page_table_unlock = pt_unlock |
|
44 | }; |
49 | }; |
45 | 50 | ||
46 | /** Create PTL0. |
51 | /** Create PTL0. |
47 | * |
52 | * |
48 | * PTL0 of 4-level page table will be created for each address space. |
53 | * PTL0 of 4-level page table will be created for each address space. |
49 | * |
54 | * |
50 | * @param flags Flags can specify whether ptl0 is for the kernel address space. |
55 | * @param flags Flags can specify whether ptl0 is for the kernel address space. |
51 | * |
56 | * |
52 | * @return New PTL0. |
57 | * @return New PTL0. |
53 | */ |
58 | */ |
54 | pte_t *ptl0_create(int flags) |
59 | pte_t *ptl0_create(int flags) |
55 | { |
60 | { |
56 | pte_t *src_ptl0, *dst_ptl0; |
61 | pte_t *src_ptl0, *dst_ptl0; |
57 | ipl_t ipl; |
62 | ipl_t ipl; |
58 | 63 | ||
59 | dst_ptl0 = (pte_t *) PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA | FRAME_PANIC))); |
64 | dst_ptl0 = (pte_t *) PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA | FRAME_PANIC))); |
60 | 65 | ||
61 | if (flags & FLAG_AS_KERNEL) { |
66 | if (flags & FLAG_AS_KERNEL) { |
62 | memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
67 | memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
63 | } else { |
68 | } else { |
64 | /* |
69 | /* |
65 | * Copy the kernel address space portion to new PTL0. |
70 | * Copy the kernel address space portion to new PTL0. |
66 | * TODO: copy only kernel address space. |
71 | * TODO: copy only kernel address space. |
67 | */ |
72 | */ |
68 | 73 | ||
69 | ipl = interrupts_disable(); |
74 | ipl = interrupts_disable(); |
70 | spinlock_lock(&AS_KERNEL->lock); |
75 | spinlock_lock(&AS_KERNEL->lock); |
71 | src_ptl0 = (pte_t *) PA2KA((__address) AS_KERNEL->page_table); |
76 | src_ptl0 = (pte_t *) PA2KA((__address) AS_KERNEL->page_table); |
72 | memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE); |
77 | memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE); |
73 | spinlock_unlock(&AS_KERNEL->lock); |
78 | spinlock_unlock(&AS_KERNEL->lock); |
74 | interrupts_restore(ipl); |
79 | interrupts_restore(ipl); |
75 | } |
80 | } |
76 | 81 | ||
77 | return (pte_t *) KA2PA((__address) dst_ptl0); |
82 | return (pte_t *) KA2PA((__address) dst_ptl0); |
78 | } |
83 | } |
- | 84 | ||
- | 85 | /** Lock page tables. |
|
- | 86 | * |
|
- | 87 | * Lock only the address space. |
|
- | 88 | * Interrupts must be disabled. |
|
- | 89 | * |
|
- | 90 | * @param as Address space. |
|
- | 91 | * @param lock If false, do not attempt to lock the address space. |
|
- | 92 | */ |
|
- | 93 | void pt_lock(as_t *as, bool lock) |
|
- | 94 | { |
|
- | 95 | if (lock) |
|
- | 96 | spinlock_lock(&as->lock); |
|
- | 97 | } |
|
- | 98 | ||
- | 99 | /** Unlock page tables. |
|
- | 100 | * |
|
- | 101 | * Unlock the address space. |
|
- | 102 | * Interrupts must be disabled. |
|
- | 103 | * |
|
- | 104 | * @param as Address space. |
|
- | 105 | * @param unlock If false, do not attempt to unlock the address space. |
|
- | 106 | */ |
|
- | 107 | void pt_unlock(as_t *as, bool unlock) |
|
- | 108 | { |
|
- | 109 | if (unlock) |
|
- | 110 | spinlock_unlock(&as->lock); |
|
- | 111 | } |
|
79 | 112 |