| 33,7 → 33,11 |
|---|
| #include <typedefs.h> |
| #include <arch/asm.h> |
| #include <memstr.h> |
| #include <debug.h> |
| |
| /** Virtual operations for page subsystem. */ |
| page_operations_t *page_operations = NULL; |
| |
| void page_init(void) |
| { |
| page_arch_init(); |
| 73,40 → 77,10 |
|---|
| */ |
| void page_mapping_insert(__address page, __address frame, int flags, __address root) |
| { |
| pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
| __address newpt; |
| |
| ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
| |
| if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
| newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
| memsetb(newpt, PAGE_SIZE, 0); |
| SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
| SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
| } |
| |
| ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
| |
| if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
| newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
| memsetb(newpt, PAGE_SIZE, 0); |
| SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
| SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
| } |
| |
| ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
| |
| if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
| newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
| memsetb(newpt, PAGE_SIZE, 0); |
| SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
| SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
| } |
| |
| ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
| |
| SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
| SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
| ASSERT(page_operations); |
| ASSERT(page_operations->mapping_insert); |
| |
| page_operations->mapping_insert(page, frame, flags, root); |
| } |
| |
| /** Find mapping for virtual page |
| 120,24 → 94,8 |
|---|
| */ |
| pte_t *page_mapping_find(__address page, __address root) |
| { |
| pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
| ASSERT(page_operations); |
| ASSERT(page_operations->mapping_find); |
| |
| ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
| |
| if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) |
| return NULL; |
| |
| ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
| |
| if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) |
| return NULL; |
| |
| ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
| |
| if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) |
| return NULL; |
| |
| ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
| |
| return &ptl3[PTL3_INDEX(page)]; |
| return page_operations->mapping_find(page, root); |
| } |