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kernel add
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#ifndef __ASM_SH_PGTABLE_2LEVEL_H
#define __ASM_SH_PGTABLE_2LEVEL_H
#include <asm-generic/pgtable-nopmd.h>
/*
* traditional two-level paging structure
*/
#define PAGETABLE_LEVELS 2
/* PTE bits */
#define PTE_MAGNITUDE 2 /* 32-bit PTEs */
#define PTE_SHIFT PAGE_SHIFT
#define PTE_BITS (PTE_SHIFT - PTE_MAGNITUDE)
/* PGD bits */
#define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
#define PTRS_PER_PGD (PAGE_SIZE / (1 << PTE_MAGNITUDE))
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
#endif /* __ASM_SH_PGTABLE_2LEVEL_H */
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