Linux Kernel  3.7.1
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pgtable-2level.h
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1 #ifndef __ASM_SH_PGTABLE_2LEVEL_H
2 #define __ASM_SH_PGTABLE_2LEVEL_H
3 
5 
6 /*
7  * traditional two-level paging structure
8  */
9 #define PAGETABLE_LEVELS 2
10 
11 /* PTE bits */
12 #define PTE_MAGNITUDE 2 /* 32-bit PTEs */
13 
14 #define PTE_SHIFT PAGE_SHIFT
15 #define PTE_BITS (PTE_SHIFT - PTE_MAGNITUDE)
16 
17 /* PGD bits */
18 #define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
19 
20 #define PTRS_PER_PGD (PAGE_SIZE / (1 << PTE_MAGNITUDE))
21 #define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
22 
23 #endif /* __ASM_SH_PGTABLE_2LEVEL_H */