Rev 814 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 814 | Rev 826 | ||
---|---|---|---|
Line 36... | Line 36... | ||
36 | #include <typedefs.h> |
36 | #include <typedefs.h> |
37 | #include <arch/asm.h> |
37 | #include <arch/asm.h> |
38 | #include <memstr.h> |
38 | #include <memstr.h> |
39 | 39 | ||
40 | static void pt_mapping_insert(as_t *as, __address page, __address frame, int flags); |
40 | static void pt_mapping_insert(as_t *as, __address page, __address frame, int flags); |
- | 41 | static void pt_mapping_remove(as_t *as, __address page); |
|
41 | static pte_t *pt_mapping_find(as_t *as, __address page); |
42 | static pte_t *pt_mapping_find(as_t *as, __address page); |
42 | 43 | ||
43 | page_mapping_operations_t pt_mapping_operations = { |
44 | page_mapping_operations_t pt_mapping_operations = { |
44 | .mapping_insert = pt_mapping_insert, |
45 | .mapping_insert = pt_mapping_insert, |
- | 46 | .mapping_remove = pt_mapping_remove, |
|
45 | .mapping_find = pt_mapping_find |
47 | .mapping_find = pt_mapping_find |
46 | }; |
48 | }; |
47 | 49 | ||
48 | /** Map page to frame using hierarchical page tables. |
50 | /** Map page to frame using hierarchical page tables. |
49 | * |
51 | * |
Line 93... | Line 95... | ||
93 | 95 | ||
94 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
96 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
95 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
97 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
96 | } |
98 | } |
97 | 99 | ||
- | 100 | /** Remove mapping of page from hierarchical page tables. |
|
- | 101 | * |
|
- | 102 | * Remove any mapping of 'page' within address space 'as'. |
|
- | 103 | * TLB shootdown should follow in order to make effects of |
|
- | 104 | * this call visible. |
|
- | 105 | * |
|
- | 106 | * The address space must be locked and interrupts must be disabled. |
|
- | 107 | * |
|
- | 108 | * @param as Address space to wich page belongs. |
|
- | 109 | * @param page Virtual address of the page to be demapped. |
|
- | 110 | */ |
|
- | 111 | void pt_mapping_remove(as_t *as, __address page) |
|
- | 112 | { |
|
- | 113 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
|
- | 114 | ||
- | 115 | ptl0 = (pte_t *) PA2KA((__address) as->page_table); |
|
- | 116 | ||
- | 117 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) |
|
- | 118 | return; |
|
- | 119 | ||
- | 120 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
|
- | 121 | ||
- | 122 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) |
|
- | 123 | return; |
|
- | 124 | ||
- | 125 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
|
- | 126 | ||
- | 127 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) |
|
- | 128 | return; |
|
- | 129 | ||
- | 130 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
|
- | 131 | ||
- | 132 | /* Destroy the mapping. Setting to PAGE_NOT_PRESENT is not sufficient. */ |
|
- | 133 | memsetb((__address) &ptl3[PTL3_INDEX(page)], sizeof(pte_t), 0); |
|
- | 134 | } |
|
- | 135 | ||
98 | /** Find mapping for virtual page in hierarchical page tables. |
136 | /** Find mapping for virtual page in hierarchical page tables. |
99 | * |
137 | * |
100 | * Find mapping for virtual page. |
138 | * Find mapping for virtual page. |
101 | * |
139 | * |
102 | * The address space must be locked and interrupts must be disabled. |
140 | * The address space must be locked and interrupts must be disabled. |