64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#ifndef _ASM_X86_PGTABLE_64_DEFS_H
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#define _ASM_X86_PGTABLE_64_DEFS_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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/*
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* These are used to make use of C type-checking..
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*/
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typedef unsigned long pteval_t;
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typedef unsigned long pmdval_t;
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typedef unsigned long pudval_t;
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typedef unsigned long pgdval_t;
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typedef unsigned long pgprotval_t;
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typedef struct { pteval_t pte; } pte_t;
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#endif /* !__ASSEMBLY__ */
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#define SHARED_KERNEL_PMD 0
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#define PAGETABLE_LEVELS 4
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/*
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* PGDIR_SHIFT determines what a top-level page table entry can map
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*/
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#define PGDIR_SHIFT 39
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#define PTRS_PER_PGD 512
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/*
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* 3rd level page
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*/
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#define PUD_SHIFT 30
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#define PTRS_PER_PUD 512
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/*
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* PMD_SHIFT determines the size of the area a middle-level
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* page table can map
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*/
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#define PMD_SHIFT 21
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#define PTRS_PER_PMD 512
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/*
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* entries per page directory level
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*/
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#define PTRS_PER_PTE 512
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#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
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#define PMD_MASK (~(PMD_SIZE - 1))
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#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
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#define PUD_MASK (~(PUD_SIZE - 1))
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#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE - 1))
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/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
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#define MAXMEM _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
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#define VMALLOC_START _AC(0xffffc90000000000, UL)
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#define VMALLOC_END _AC(0xffffe8ffffffffff, UL)
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#define VMEMMAP_START _AC(0xffffea0000000000, UL)
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#define MODULES_VADDR _AC(0xffffffffa0000000, UL)
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#define MODULES_END _AC(0xffffffffff000000, UL)
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#define MODULES_LEN (MODULES_END - MODULES_VADDR)
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#endif /* _ASM_X86_PGTABLE_64_DEFS_H */
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