| 55,57 → 55,14 |
|---|
| #define PAGE_WRITE (1<<PAGE_WRITE_SHIFT) |
| #define PAGE_EXEC (1<<PAGE_EXEC_SHIFT) |
| |
| /* |
| * This is the generic 4-level page table interface. |
| * Architectures are supposed to implement *_ARCH macros. |
| */ |
| struct page_operations { |
| void (* mapping_insert)(__address page, __address frame, int flags, __address root); |
| pte_t *(* mapping_find)(__address page, __address root); |
| }; |
| typedef struct page_operations page_operations_t; |
| |
| /* |
| * These macros process vaddr and extract those portions |
| * of it that function as indices to respective page tables. |
| */ |
| #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
| #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
| #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
| #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
| extern page_operations_t *page_operations; |
| |
| #define GET_PTL0_ADDRESS() GET_PTL0_ADDRESS_ARCH() |
| #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
| |
| /* |
| * These macros traverse the 4-level tree of page tables, |
| * each descending by one level. |
| */ |
| #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
| #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
| #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
| #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
| |
| /* |
| * These macros are provided to change shape of the 4-level |
| * tree of page tables on respective level. |
| */ |
| #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
| #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
| #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
| #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
| |
| /* |
| * These macros are provided to query various flags within the page tables. |
| */ |
| #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
| #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
| #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
| #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
| |
| /* |
| * These macros are provided to set/clear various flags within the page tables. |
| */ |
| #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
| #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
| #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
| #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
| |
| extern void page_init(void); |
| extern void page_mapping_insert(__address page, __address frame, int flags, __address root); |
| extern pte_t *page_mapping_find(__address page, __address root); |