1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef _ASM_PGALLOC_H 6 #define _ASM_PGALLOC_H 7 8 #include <linux/mm.h> 9 #include <linux/sched.h> 10 11 #define __HAVE_ARCH_PMD_ALLOC_ONE 12 #define __HAVE_ARCH_PUD_ALLOC_ONE 13 #include <asm-generic/pgalloc.h> 14 15 static inline void pmd_populate_kernel(struct mm_struct *mm, 16 pmd_t *pmd, pte_t *pte) 17 { 18 set_pmd(pmd, __pmd((unsigned long)pte)); 19 } 20 21 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte) 22 { 23 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 24 } 25 26 #ifndef __PAGETABLE_PMD_FOLDED 27 28 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 29 { 30 set_pud(pud, __pud((unsigned long)pmd)); 31 } 32 #endif 33 34 #ifndef __PAGETABLE_PUD_FOLDED 35 36 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 37 { 38 set_p4d(p4d, __p4d((unsigned long)pud)); 39 } 40 41 #endif /* __PAGETABLE_PUD_FOLDED */ 42 43 extern void pagetable_init(void); 44 45 extern pgd_t *pgd_alloc(struct mm_struct *mm); 46 47 #define __pte_free_tlb(tlb, pte, address) \ 48 do { \ 49 pagetable_pte_dtor(page_ptdesc(pte)); \ 50 tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \ 51 } while (0) 52 53 #ifndef __PAGETABLE_PMD_FOLDED 54 55 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) 56 { 57 pmd_t *pmd; 58 struct ptdesc *ptdesc; 59 60 ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, 0); 61 if (!ptdesc) 62 return NULL; 63 64 if (!pagetable_pmd_ctor(ptdesc)) { 65 pagetable_free(ptdesc); 66 return NULL; 67 } 68 69 pmd = ptdesc_address(ptdesc); 70 pmd_init(pmd); 71 return pmd; 72 } 73 74 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) 75 76 #endif 77 78 #ifndef __PAGETABLE_PUD_FOLDED 79 80 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) 81 { 82 pud_t *pud; 83 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0); 84 85 if (!ptdesc) 86 return NULL; 87 pud = ptdesc_address(ptdesc); 88 89 pud_init(pud); 90 return pud; 91 } 92 93 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) 94 95 #endif /* __PAGETABLE_PUD_FOLDED */ 96 97 extern pte_t * __init populate_kernel_pte(unsigned long addr); 98 #endif /* _ASM_PGALLOC_H */ 99