1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_IA64_PGALLOC_H 3 #define _ASM_IA64_PGALLOC_H 4 5 /* 6 * This file contains the functions and defines necessary to allocate 7 * page tables. 8 * 9 * This hopefully works with any (fixed) ia-64 page-size, as defined 10 * in <asm/page.h> (currently 8192). 11 * 12 * Copyright (C) 1998-2001 Hewlett-Packard Co 13 * David Mosberger-Tang <davidm@hpl.hp.com> 14 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com> 15 */ 16 17 18 #include <linux/compiler.h> 19 #include <linux/mm.h> 20 #include <linux/page-flags.h> 21 #include <linux/threads.h> 22 23 #include <asm-generic/pgalloc.h> 24 25 #include <asm/mmu_context.h> 26 27 static inline pgd_t *pgd_alloc(struct mm_struct *mm) 28 { 29 return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); 30 } 31 32 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 33 { 34 free_page((unsigned long)pgd); 35 } 36 37 #if CONFIG_PGTABLE_LEVELS == 4 38 static inline void 39 pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) 40 { 41 pgd_val(*pgd_entry) = __pa(pud); 42 } 43 44 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 45 { 46 return (pud_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); 47 } 48 49 static inline void pud_free(struct mm_struct *mm, pud_t *pud) 50 { 51 free_page((unsigned long)pud); 52 } 53 #define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud) 54 #endif /* CONFIG_PGTABLE_LEVELS == 4 */ 55 56 static inline void 57 pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) 58 { 59 pud_val(*pud_entry) = __pa(pmd); 60 } 61 62 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 63 { 64 return (pmd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); 65 } 66 67 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 68 { 69 free_page((unsigned long)pmd); 70 } 71 72 #define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd) 73 74 static inline void 75 pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte) 76 { 77 pmd_val(*pmd_entry) = page_to_phys(pte); 78 } 79 #define pmd_pgtable(pmd) pmd_page(pmd) 80 81 static inline void 82 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) 83 { 84 pmd_val(*pmd_entry) = __pa(pte); 85 } 86 87 #define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte) 88 89 #endif /* _ASM_IA64_PGALLOC_H */ 90