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 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 28 static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) 29 { 30 pudval_t pudval = PUD_TYPE_TABLE; 31 32 pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN; 33 __pud_populate(pudp, __pa(pmdp), pudval); 34 } 35 #else 36 static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) 37 { 38 BUILD_BUG(); 39 } 40 #endif /* CONFIG_PGTABLE_LEVELS > 2 */ 41 42 #if CONFIG_PGTABLE_LEVELS > 3 43 44 static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) 45 { 46 set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot)); 47 } 48 49 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp) 50 { 51 p4dval_t p4dval = P4D_TYPE_TABLE; 52 53 p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN; 54 __p4d_populate(p4dp, __pa(pudp), p4dval); 55 } 56 #else 57 static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) 58 { 59 BUILD_BUG(); 60 } 61 #endif /* CONFIG_PGTABLE_LEVELS > 3 */ 62 63 extern pgd_t *pgd_alloc(struct mm_struct *mm); 64 extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp); 65 66 static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep, 67 pmdval_t prot) 68 { 69 set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot)); 70 } 71 72 /* 73 * Populate the pmdp entry with a pointer to the pte. This pmd is part 74 * of the mm address space. 75 */ 76 static inline void 77 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) 78 { 79 VM_BUG_ON(mm && mm != &init_mm); 80 __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE | PMD_TABLE_UXN); 81 } 82 83 static inline void 84 pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) 85 { 86 VM_BUG_ON(mm == &init_mm); 87 __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE | PMD_TABLE_PXN); 88 } 89 90 #endif 91