1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Based on arch/arm/include/asm/pgalloc.h
4 *
5 * Copyright (C) 2000-2001 Russell King
6 * Copyright (C) 2012 ARM Ltd.
7 */
8 #ifndef __ASM_PGALLOC_H
9 #define __ASM_PGALLOC_H
10
11 #include <asm/pgtable-hwdef.h>
12 #include <asm/processor.h>
13 #include <asm/cacheflush.h>
14 #include <asm/tlbflush.h>
15
16 #define __HAVE_ARCH_PGD_FREE
17 #include <asm-generic/pgalloc.h>
18
19 #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))
20
21 #if CONFIG_PGTABLE_LEVELS > 2
22
__pud_populate(pud_t * pudp,phys_addr_t pmdp,pudval_t prot)23 static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
24 {
25 set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot));
26 }
27
pud_populate(struct mm_struct * mm,pud_t * pudp,pmd_t * pmdp)28 static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp)
29 {
30 __pud_populate(pudp, __pa(pmdp), PMD_TYPE_TABLE);
31 }
32 #else
__pud_populate(pud_t * pudp,phys_addr_t pmdp,pudval_t prot)33 static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
34 {
35 BUILD_BUG();
36 }
37 #endif /* CONFIG_PGTABLE_LEVELS > 2 */
38
39 #if CONFIG_PGTABLE_LEVELS > 3
40
__p4d_populate(p4d_t * p4dp,phys_addr_t pudp,p4dval_t prot)41 static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
42 {
43 set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
44 }
45
p4d_populate(struct mm_struct * mm,p4d_t * p4dp,pud_t * pudp)46 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
47 {
48 __p4d_populate(p4dp, __pa(pudp), PUD_TYPE_TABLE);
49 }
50 #else
__p4d_populate(p4d_t * p4dp,phys_addr_t pudp,p4dval_t prot)51 static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
52 {
53 BUILD_BUG();
54 }
55 #endif /* CONFIG_PGTABLE_LEVELS > 3 */
56
57 extern pgd_t *pgd_alloc(struct mm_struct *mm);
58 extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp);
59
__pmd_populate(pmd_t * pmdp,phys_addr_t ptep,pmdval_t prot)60 static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep,
61 pmdval_t prot)
62 {
63 set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot));
64 }
65
66 /*
67 * Populate the pmdp entry with a pointer to the pte. This pmd is part
68 * of the mm address space.
69 */
70 static inline void
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmdp,pte_t * ptep)71 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
72 {
73 /*
74 * The pmd must be loaded with the physical address of the PTE table
75 */
76 __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE);
77 }
78
79 static inline void
pmd_populate(struct mm_struct * mm,pmd_t * pmdp,pgtable_t ptep)80 pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
81 {
82 __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE);
83 }
84 #define pmd_pgtable(pmd) pmd_page(pmd)
85
86 #endif
87