git.joshuawise.com / netwatch.git / blame
| Commit | Line | Data |
|---|---|---|
| 9e2a82e4 JP |
1 | /** Page table and page directory flags. |
| 2 | * | |
| 3 | * From intel-sys.pdf. | |
| 4 | * | |
| 5 | * @author Jacob Potter (jdpotter) | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _VM_FLAGS_H | |
| 9 | #define _VM_FLAGS_H | |
| 10 | ||
| 923ea2c2 JW |
11 | #define PTE_FOR(x) (((unsigned int)(x) >> 12) & 0x3FF) |
| 12 | #define PDE_FOR(x) ((unsigned int)(x) >> 22) | |
| 13 | #define ADDR_12_MASK(x) ((unsigned int)(x) & ~((1 << 12) - 1)) | |
| 14 | #define ADDR_22_MASK(x) ((unsigned int)(x) & ~((1 << 22) - 1)) | |
| 15 | #define LOWER_12(x) ((unsigned int)(x) & ((1 << 12) - 1)) | |
| 16 | #define LOWER_22(x) ((unsigned int)(x) & ((1 << 22) - 1)) | |
| 17 | ||
| 9e2a82e4 JP |
18 | #define PDE_4M_ADDR_SHIFT 22 |
| 19 | #define PTE_4K_ADDR_SHIFT 12 | |
| 20 | #define PDE_TABLE_ADDR_SHIFT 12 | |
| 21 | #define PTE_FRAME_ADDR_MASK (~((1 << PTE_4K_ADDR_SHIFT) - 1)) | |
| 22 | #define PDE_TABLE_ADDR_MASK (~((1 << PDE_TABLE_ADDR_SHIFT) - 1)) | |
| 23 | ||
| 24 | #define PDE_ATTRIB_INDEX (1 << 12) | |
| 25 | #define PDE_GLOBAL (1 << 8) | |
| 26 | #define PDE_PAGE_SIZE (1 << 7) | |
| 27 | #define PDE_DIRTY (1 << 6) | |
| 28 | #define PDE_ACCESSED (1 << 5) | |
| 29 | #define PDE_NO_CACHE (1 << 4) | |
| 30 | #define PDE_WRITE_THROUGH (1 << 3) | |
| 31 | #define PDE_USER (1 << 2) | |
| 32 | #define PDE_READ_WRITE (1 << 1) | |
| 33 | #define PDE_PRESENT (1 << 0) | |
| 34 | ||
| 35 | #define PTE_GLOBAL (1 << 8) | |
| 36 | #define PTE_ATTRIB_INDEX (1 << 7) | |
| 37 | #define PTE_DIRTY (1 << 6) | |
| 38 | #define PTE_ACCESSED (1 << 5) | |
| 39 | #define PTE_NO_CACHE (1 << 4) | |
| 40 | #define PTE_WRITE_THROUGH (1 << 3) | |
| 41 | #define PTE_USER (1 << 2) | |
| 42 | #define PTE_READ_WRITE (1 << 1) | |
| 43 | #define PTE_PRESENT (1 << 0) | |
| 44 | ||
| 45 | #endif /* _VM_FLAGS_H */ |