Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/riscv/include/asm/pgalloc.h
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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com> * Copyright (C) 2012 Regents of the University of California */ #ifndef _ASM_RISCV_PGALLOC_H #define _ASM_RISCV_PGALLOC_H #include <linux/mm.h> #include <asm/tlb.h> #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) { unsigned long pfn = virt_to_pfn(pte); set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte) { unsigned long pfn = virt_to_pfn(page_address(pte)); set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); } #ifndef __PAGETABLE_PMD_FOLDED static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) { unsigned long pfn = virt_to_pfn(pmd); set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); } #endif /* __PAGETABLE_PMD_FOLDED */ #define pmd_pgtable(pmd) pmd_page(pmd) static inline pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *pgd; pgd = (pgd_t *)__get_free_page(GFP_KERNEL); if (likely(pgd != NULL)) { memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t)); /* Copy kernel mappings */ memcpy(pgd + USER_PTRS_PER_PGD, init_mm.pgd + USER_PTRS_PER_PGD, (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); } return pgd; } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { free_page((unsigned long)pgd); } #ifndef __PAGETABLE_PMD_FOLDED static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { return (pmd_t *)__get_free_page( GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { free_page((unsigned long)pmd); } #define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) #endif /* __PAGETABLE_PMD_FOLDED */ #define __pte_free_tlb(tlb, pte, buf) \ do { \ pgtable_pte_page_dtor(pte); \ tlb_remove_page((tlb), pte); \ } while (0) #endif /* _ASM_RISCV_PGALLOC_H */
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