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
23static 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
28static 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
33static 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
41static 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
46static 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
51static 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
57extern pgd_t *pgd_alloc(struct mm_struct *mm);
58extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp);
59
60static 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 */
70static inline void
71pmd_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
79static inline void
80pmd_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