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68 lines
1.4 KiB
68 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* arch/arm/include/asm/tlb.h |
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* |
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* Copyright (C) 2002 Russell King |
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* |
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* Experimentation shows that on a StrongARM, it appears to be faster |
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* to use the "invalidate whole tlb" rather than "invalidate single |
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* tlb" for this. |
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* |
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* This appears true for both the process fork+exit case, as well as |
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* the munmap-large-area case. |
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*/ |
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#ifndef __ASMARM_TLB_H |
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#define __ASMARM_TLB_H |
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#include <asm/cacheflush.h> |
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#ifndef CONFIG_MMU |
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#include <linux/pagemap.h> |
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#define tlb_flush(tlb) ((void) tlb) |
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#include <asm-generic/tlb.h> |
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#else /* !CONFIG_MMU */ |
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#include <linux/swap.h> |
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#include <asm/tlbflush.h> |
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static inline void __tlb_remove_table(void *_table) |
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{ |
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free_page_and_swap_cache((struct page *)_table); |
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} |
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#include <asm-generic/tlb.h> |
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static inline void |
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__pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr) |
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{ |
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pgtable_pte_page_dtor(pte); |
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#ifndef CONFIG_ARM_LPAE |
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/* |
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* With the classic ARM MMU, a pte page has two corresponding pmd |
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* entries, each covering 1MB. |
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*/ |
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addr = (addr & PMD_MASK) + SZ_1M; |
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__tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE); |
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#endif |
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tlb_remove_table(tlb, pte); |
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} |
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static inline void |
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__pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr) |
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{ |
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#ifdef CONFIG_ARM_LPAE |
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struct page *page = virt_to_page(pmdp); |
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pgtable_pmd_page_dtor(page); |
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tlb_remove_table(tlb, page); |
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#endif |
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} |
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#endif /* CONFIG_MMU */ |
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#endif
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