1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
4 * Copyright (C) 2012 Regents of the University of California
5 */
6
7 #ifndef _ASM_RISCV_PGALLOC_H
8 #define _ASM_RISCV_PGALLOC_H
9
10 #include <linux/mm.h>
11 #include <asm/sbi.h>
12 #include <asm/tlb.h>
13
14 #ifdef CONFIG_MMU
15 #define __HAVE_ARCH_PUD_FREE
16 #include <asm-generic/pgalloc.h>
17
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)18 static inline void pmd_populate_kernel(struct mm_struct *mm,
19 pmd_t *pmd, pte_t *pte)
20 {
21 unsigned long pfn = virt_to_pfn(pte);
22
23 set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
24 }
25
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)26 static inline void pmd_populate(struct mm_struct *mm,
27 pmd_t *pmd, pgtable_t pte)
28 {
29 unsigned long pfn = virt_to_pfn(page_address(pte));
30
31 set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
32 }
33
34 #ifndef __PAGETABLE_PMD_FOLDED
pud_populate(struct mm_struct * mm,pud_t * pud,pmd_t * pmd)35 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
36 {
37 unsigned long pfn = virt_to_pfn(pmd);
38
39 set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
40 }
41
p4d_populate(struct mm_struct * mm,p4d_t * p4d,pud_t * pud)42 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
43 {
44 if (pgtable_l4_enabled) {
45 unsigned long pfn = virt_to_pfn(pud);
46
47 set_p4d(p4d, __p4d((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
48 }
49 }
50
p4d_populate_safe(struct mm_struct * mm,p4d_t * p4d,pud_t * pud)51 static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d,
52 pud_t *pud)
53 {
54 if (pgtable_l4_enabled) {
55 unsigned long pfn = virt_to_pfn(pud);
56
57 set_p4d_safe(p4d,
58 __p4d((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
59 }
60 }
61
pgd_populate(struct mm_struct * mm,pgd_t * pgd,p4d_t * p4d)62 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
63 {
64 if (pgtable_l5_enabled) {
65 unsigned long pfn = virt_to_pfn(p4d);
66
67 set_pgd(pgd, __pgd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
68 }
69 }
70
pgd_populate_safe(struct mm_struct * mm,pgd_t * pgd,p4d_t * p4d)71 static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd,
72 p4d_t *p4d)
73 {
74 if (pgtable_l5_enabled) {
75 unsigned long pfn = virt_to_pfn(p4d);
76
77 set_pgd_safe(pgd,
78 __pgd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
79 }
80 }
81
82 #define pud_free pud_free
pud_free(struct mm_struct * mm,pud_t * pud)83 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
84 {
85 if (pgtable_l4_enabled)
86 __pud_free(mm, pud);
87 }
88
__pud_free_tlb(struct mmu_gather * tlb,pud_t * pud,unsigned long addr)89 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
90 unsigned long addr)
91 {
92 if (pgtable_l4_enabled)
93 tlb_remove_ptdesc(tlb, virt_to_ptdesc(pud));
94 }
95
__p4d_free_tlb(struct mmu_gather * tlb,p4d_t * p4d,unsigned long addr)96 static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
97 unsigned long addr)
98 {
99 if (pgtable_l5_enabled)
100 tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d));
101 }
102 #endif /* __PAGETABLE_PMD_FOLDED */
103
sync_kernel_mappings(pgd_t * pgd)104 static inline void sync_kernel_mappings(pgd_t *pgd)
105 {
106 memcpy(pgd + USER_PTRS_PER_PGD,
107 init_mm.pgd + USER_PTRS_PER_PGD,
108 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
109 }
110
pgd_alloc(struct mm_struct * mm)111 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
112 {
113 pgd_t *pgd;
114
115 pgd = __pgd_alloc(mm, 0);
116 if (likely(pgd != NULL)) {
117 /* Copy kernel mappings */
118 sync_kernel_mappings(pgd);
119 }
120 return pgd;
121 }
122
123 #ifndef __PAGETABLE_PMD_FOLDED
124
__pmd_free_tlb(struct mmu_gather * tlb,pmd_t * pmd,unsigned long addr)125 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
126 unsigned long addr)
127 {
128 tlb_remove_ptdesc(tlb, virt_to_ptdesc(pmd));
129 }
130
131 #endif /* __PAGETABLE_PMD_FOLDED */
132
__pte_free_tlb(struct mmu_gather * tlb,pgtable_t pte,unsigned long addr)133 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
134 unsigned long addr)
135 {
136 tlb_remove_ptdesc(tlb, page_ptdesc(pte));
137 }
138 #endif /* CONFIG_MMU */
139
140 #endif /* _ASM_RISCV_PGALLOC_H */
141