1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2003 PathScale Inc
4*4882a593Smuzhiyun * Derived from include/asm-i386/pgtable.h
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef __UM_PGTABLE_3LEVEL_H
8*4882a593Smuzhiyun #define __UM_PGTABLE_3LEVEL_H
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <asm-generic/pgtable-nopud.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /* PGDIR_SHIFT determines what a third-level page table entry can map */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #ifdef CONFIG_64BIT
15*4882a593Smuzhiyun #define PGDIR_SHIFT 30
16*4882a593Smuzhiyun #else
17*4882a593Smuzhiyun #define PGDIR_SHIFT 31
18*4882a593Smuzhiyun #endif
19*4882a593Smuzhiyun #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
20*4882a593Smuzhiyun #define PGDIR_MASK (~(PGDIR_SIZE-1))
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /* PMD_SHIFT determines the size of the area a second-level page table can
23*4882a593Smuzhiyun * map
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define PMD_SHIFT 21
27*4882a593Smuzhiyun #define PMD_SIZE (1UL << PMD_SHIFT)
28*4882a593Smuzhiyun #define PMD_MASK (~(PMD_SIZE-1))
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun /*
31*4882a593Smuzhiyun * entries per page directory level
32*4882a593Smuzhiyun */
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #define PTRS_PER_PTE 512
35*4882a593Smuzhiyun #ifdef CONFIG_64BIT
36*4882a593Smuzhiyun #define PTRS_PER_PMD 512
37*4882a593Smuzhiyun #define PTRS_PER_PGD 512
38*4882a593Smuzhiyun #else
39*4882a593Smuzhiyun #define PTRS_PER_PMD 1024
40*4882a593Smuzhiyun #define PTRS_PER_PGD 1024
41*4882a593Smuzhiyun #endif
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
44*4882a593Smuzhiyun #define FIRST_USER_ADDRESS 0UL
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun #define pte_ERROR(e) \
47*4882a593Smuzhiyun printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
48*4882a593Smuzhiyun pte_val(e))
49*4882a593Smuzhiyun #define pmd_ERROR(e) \
50*4882a593Smuzhiyun printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
51*4882a593Smuzhiyun pmd_val(e))
52*4882a593Smuzhiyun #define pgd_ERROR(e) \
53*4882a593Smuzhiyun printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
54*4882a593Smuzhiyun pgd_val(e))
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
57*4882a593Smuzhiyun #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
58*4882a593Smuzhiyun #define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
59*4882a593Smuzhiyun #define pud_populate(mm, pud, pmd) \
60*4882a593Smuzhiyun set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun #ifdef CONFIG_64BIT
63*4882a593Smuzhiyun #define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
64*4882a593Smuzhiyun #else
65*4882a593Smuzhiyun #define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
66*4882a593Smuzhiyun #endif
67*4882a593Smuzhiyun
pgd_newpage(pgd_t pgd)68*4882a593Smuzhiyun static inline int pgd_newpage(pgd_t pgd)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun return(pgd_val(pgd) & _PAGE_NEWPAGE);
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
pgd_mkuptodate(pgd_t pgd)73*4882a593Smuzhiyun static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun #ifdef CONFIG_64BIT
76*4882a593Smuzhiyun #define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
77*4882a593Smuzhiyun #else
78*4882a593Smuzhiyun #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
79*4882a593Smuzhiyun #endif
80*4882a593Smuzhiyun
pud_clear(pud_t * pud)81*4882a593Smuzhiyun static inline void pud_clear (pud_t *pud)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun set_pud(pud, __pud(_PAGE_NEWPAGE));
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
87*4882a593Smuzhiyun #define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
88*4882a593Smuzhiyun
pte_pfn(pte_t pte)89*4882a593Smuzhiyun static inline unsigned long pte_pfn(pte_t pte)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun return phys_to_pfn(pte_val(pte));
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
pfn_pte(unsigned long page_nr,pgprot_t pgprot)94*4882a593Smuzhiyun static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun pte_t pte;
97*4882a593Smuzhiyun phys_t phys = pfn_to_phys(page_nr);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun pte_set_val(pte, phys, pgprot);
100*4882a593Smuzhiyun return pte;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
pfn_pmd(unsigned long page_nr,pgprot_t pgprot)103*4882a593Smuzhiyun static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun #endif
109*4882a593Smuzhiyun
110