1 /** Page table and page directory flags.
5 * @author Jacob Potter (jdpotter)
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))
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))
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)
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)
45 #endif /* _VM_FLAGS_H */