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69 lines
1.7 KiB
69 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2009 Chen Liqin <[email protected]> |
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* Copyright (C) 2012 Regents of the University of California |
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*/ |
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#ifndef _ASM_RISCV_PGALLOC_H |
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#define _ASM_RISCV_PGALLOC_H |
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#include <linux/mm.h> |
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#include <asm/tlb.h> |
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#ifdef CONFIG_MMU |
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#include <asm-generic/pgalloc.h> |
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static inline void pmd_populate_kernel(struct mm_struct *mm, |
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pmd_t *pmd, pte_t *pte) |
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{ |
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unsigned long pfn = virt_to_pfn(pte); |
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set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); |
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} |
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static inline void pmd_populate(struct mm_struct *mm, |
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pmd_t *pmd, pgtable_t pte) |
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{ |
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unsigned long pfn = virt_to_pfn(page_address(pte)); |
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set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); |
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} |
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#ifndef __PAGETABLE_PMD_FOLDED |
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) |
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{ |
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unsigned long pfn = virt_to_pfn(pmd); |
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set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE)); |
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} |
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#endif /* __PAGETABLE_PMD_FOLDED */ |
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static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
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{ |
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pgd_t *pgd; |
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pgd = (pgd_t *)__get_free_page(GFP_KERNEL); |
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if (likely(pgd != NULL)) { |
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memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t)); |
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/* Copy kernel mappings */ |
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memcpy(pgd + USER_PTRS_PER_PGD, |
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init_mm.pgd + USER_PTRS_PER_PGD, |
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); |
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} |
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return pgd; |
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} |
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#ifndef __PAGETABLE_PMD_FOLDED |
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#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) |
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#endif /* __PAGETABLE_PMD_FOLDED */ |
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#define __pte_free_tlb(tlb, pte, buf) \ |
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do { \ |
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pgtable_pte_page_dtor(pte); \ |
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tlb_remove_page((tlb), pte); \ |
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} while (0) |
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#endif /* CONFIG_MMU */ |
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#endif /* _ASM_RISCV_PGALLOC_H */
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