pgtable-3level-defs.h 569 字节
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#ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H
#define _ASM_X86_PGTABLE_3LEVEL_DEFS_H
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#ifdef CONFIG_PARAVIRT
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#define SHARED_KERNEL_PMD	(pv_info.shared_kernel_pmd)
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#else
#define SHARED_KERNEL_PMD	1
#endif

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/*
 * PGDIR_SHIFT determines what a top-level page table entry can map
 */
#define PGDIR_SHIFT	30
#define PTRS_PER_PGD	4

/*
 * PMD_SHIFT determines the size of the area a middle-level
 * page table can map
 */
#define PMD_SHIFT	21
#define PTRS_PER_PMD	512

/*
 * entries per page directory level
 */
#define PTRS_PER_PTE	512

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#endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */