From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arm64/include/asm/pgalloc.h | 155 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 arch/arm64/include/asm/pgalloc.h (limited to 'arch/arm64/include/asm/pgalloc.h') diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h new file mode 100644 index 000000000..2e05bcd94 --- /dev/null +++ b/arch/arm64/include/asm/pgalloc.h @@ -0,0 +1,155 @@ +/* + * Based on arch/arm/include/asm/pgalloc.h + * + * Copyright (C) 2000-2001 Russell King + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifndef __ASM_PGALLOC_H +#define __ASM_PGALLOC_H + +#include +#include +#include +#include + +#define check_pgt_cache() do { } while (0) + +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO) +#define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) + +#if CONFIG_PGTABLE_LEVELS > 2 + +static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + return (pmd_t *)__get_free_page(PGALLOC_GFP); +} + +static inline void pmd_free(struct mm_struct *mm, pmd_t *pmdp) +{ + BUG_ON((unsigned long)pmdp & (PAGE_SIZE-1)); + free_page((unsigned long)pmdp); +} + +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) +{ + set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot)); +} + +static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) +{ + __pud_populate(pudp, __pa(pmdp), PMD_TYPE_TABLE); +} +#else +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) +{ + BUILD_BUG(); +} +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ + +#if CONFIG_PGTABLE_LEVELS > 3 + +static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + return (pud_t *)__get_free_page(PGALLOC_GFP); +} + +static inline void pud_free(struct mm_struct *mm, pud_t *pudp) +{ + BUG_ON((unsigned long)pudp & (PAGE_SIZE-1)); + free_page((unsigned long)pudp); +} + +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pudp, pgdval_t prot) +{ + set_pgd(pgdp, __pgd(__phys_to_pgd_val(pudp) | prot)); +} + +static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, pud_t *pudp) +{ + __pgd_populate(pgdp, __pa(pudp), PUD_TYPE_TABLE); +} +#else +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pudp, pgdval_t prot) +{ + BUILD_BUG(); +} +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ + +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp); + +static inline pte_t * +pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) +{ + return (pte_t *)__get_free_page(PGALLOC_GFP); +} + +static inline pgtable_t +pte_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + struct page *pte; + + pte = alloc_pages(PGALLOC_GFP, 0); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } + return pte; +} + +/* + * Free a PTE table. + */ +static inline void pte_free_kernel(struct mm_struct *mm, pte_t *ptep) +{ + if (ptep) + free_page((unsigned long)ptep); +} + +static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + pgtable_page_dtor(pte); + __free_page(pte); +} + +static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep, + pmdval_t prot) +{ + set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot)); +} + +/* + * Populate the pmdp entry with a pointer to the pte. This pmd is part + * of the mm address space. + */ +static inline void +pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) +{ + /* + * The pmd must be loaded with the physical address of the PTE table + */ + __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); +} + +static inline void +pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) +{ + __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); +} +#define pmd_pgtable(pmd) pmd_page(pmd) + +#endif -- cgit v1.2.3