Rev 654 | Rev 687 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 654 | Rev 684 | ||
---|---|---|---|
Line 31... | Line 31... | ||
31 | #include <arch/mm/page.h> |
31 | #include <arch/mm/page.h> |
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | #include <arch/asm.h> |
34 | #include <arch/asm.h> |
35 | #include <memstr.h> |
35 | #include <memstr.h> |
- | 36 | #include <debug.h> |
|
- | 37 | ||
- | 38 | /** Virtual operations for page subsystem. */ |
|
- | 39 | page_operations_t *page_operations = NULL; |
|
36 | 40 | ||
37 | void page_init(void) |
41 | void page_init(void) |
38 | { |
42 | { |
39 | page_arch_init(); |
43 | page_arch_init(); |
40 | page_mapping_insert(0x0, 0x0, PAGE_NOT_PRESENT, 0); |
44 | page_mapping_insert(0x0, 0x0, PAGE_NOT_PRESENT, 0); |
Line 71... | Line 75... | ||
71 | * @param flags Flags to be used for mapping. |
75 | * @param flags Flags to be used for mapping. |
72 | * @param root Explicit PTL0 address. |
76 | * @param root Explicit PTL0 address. |
73 | */ |
77 | */ |
74 | void page_mapping_insert(__address page, __address frame, int flags, __address root) |
78 | void page_mapping_insert(__address page, __address frame, int flags, __address root) |
75 | { |
79 | { |
76 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
- | |
77 | __address newpt; |
- | |
78 | - | ||
79 | ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
- | |
80 | - | ||
81 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
- | |
82 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
- | |
83 | memsetb(newpt, PAGE_SIZE, 0); |
80 | ASSERT(page_operations); |
84 | SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
- | |
85 | SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
- | |
86 | } |
- | |
87 | - | ||
88 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
- | |
89 | - | ||
90 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
- | |
91 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
- | |
92 | memsetb(newpt, PAGE_SIZE, 0); |
- | |
93 | SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
- | |
94 | SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
- | |
95 | } |
- | |
96 | - | ||
97 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
- | |
98 | - | ||
99 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
- | |
100 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
81 | ASSERT(page_operations->mapping_insert); |
101 | memsetb(newpt, PAGE_SIZE, 0); |
- | |
102 | SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
- | |
103 | SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
- | |
104 | } |
82 | |
105 | - | ||
106 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
- | |
107 | - | ||
108 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
- | |
109 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
83 | page_operations->mapping_insert(page, frame, flags, root); |
110 | } |
84 | } |
111 | 85 | ||
112 | /** Find mapping for virtual page |
86 | /** Find mapping for virtual page |
113 | * |
87 | * |
114 | * Find mapping for virtual page. |
88 | * Find mapping for virtual page. |
Line 118... | Line 92... | ||
118 | * |
92 | * |
119 | * @return NULL if there is no such mapping; entry from PTL3 describing the mapping otherwise. |
93 | * @return NULL if there is no such mapping; entry from PTL3 describing the mapping otherwise. |
120 | */ |
94 | */ |
121 | pte_t *page_mapping_find(__address page, __address root) |
95 | pte_t *page_mapping_find(__address page, __address root) |
122 | { |
96 | { |
123 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
97 | ASSERT(page_operations); |
124 | - | ||
125 | ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
- | |
126 | - | ||
127 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) |
- | |
128 | return NULL; |
- | |
129 | - | ||
130 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
- | |
131 | - | ||
132 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) |
- | |
133 | return NULL; |
- | |
134 | - | ||
135 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
- | |
136 | - | ||
137 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) |
98 | ASSERT(page_operations->mapping_find); |
138 | return NULL; |
- | |
139 | - | ||
140 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
- | |
141 | 99 | ||
142 | return &ptl3[PTL3_INDEX(page)]; |
100 | return page_operations->mapping_find(page, root); |
143 | } |
101 | } |