1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright 2003 PathScale Inc
4 * Derived from include/asm-i386/pgtable.h
7 #ifndef __UM_PGTABLE_3LEVEL_H
8 #define __UM_PGTABLE_3LEVEL_H
10 #include <asm-generic/pgtable-nopud.h>
12 /* PGDIR_SHIFT determines what a third-level page table entry can map */
15 #define PGDIR_SHIFT 30
17 #define PGDIR_SHIFT 31
19 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
20 #define PGDIR_MASK (~(PGDIR_SIZE-1))
22 /* PMD_SHIFT determines the size of the area a second-level page table can
27 #define PMD_SIZE (1UL << PMD_SHIFT)
28 #define PMD_MASK (~(PMD_SIZE-1))
31 * entries per page directory level
34 #define PTRS_PER_PTE 512
36 #define PTRS_PER_PMD 512
37 #define PTRS_PER_PGD 512
39 #define PTRS_PER_PMD 1024
40 #define PTRS_PER_PGD 1024
43 #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
44 #define FIRST_USER_ADDRESS 0UL
46 #define pte_ERROR(e) \
47 printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
49 #define pmd_ERROR(e) \
50 printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
52 #define pgd_ERROR(e) \
53 printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
56 #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
57 #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
58 #define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
59 #define pud_populate(mm, pud, pmd) \
60 set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
63 #define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
65 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
68 static inline int pgd_newpage(pgd_t pgd)
70 return(pgd_val(pgd) & _PAGE_NEWPAGE);
73 static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
76 #define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
78 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
81 static inline void pud_clear (pud_t *pud)
83 set_pud(pud, __pud(_PAGE_NEWPAGE));
86 #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
87 #define pud_pgtable(pud) ((pmd_t *) __va(pud_val(pud) & PAGE_MASK))
89 static inline unsigned long pte_pfn(pte_t pte)
91 return phys_to_pfn(pte_val(pte));
94 static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
97 phys_t phys = pfn_to_phys(page_nr);
99 pte_set_val(pte, phys, pgprot);
103 static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
105 return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));