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| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * arch/arm/include/asm/tlb.h |
| 4 | * |
| 5 | * Copyright (C) 2002 Russell King |
| 6 | * |
| 7 | * Experimentation shows that on a StrongARM, it appears to be faster |
| 8 | * to use the "invalidate whole tlb" rather than "invalidate single |
| 9 | * tlb" for this. |
| 10 | * |
| 11 | * This appears true for both the process fork+exit case, as well as |
| 12 | * the munmap-large-area case. |
| 13 | */ |
| 14 | #ifndef __ASMARM_TLB_H |
| 15 | #define __ASMARM_TLB_H |
| 16 | |
| 17 | #include <asm/cacheflush.h> |
| 18 | |
| 19 | #ifndef CONFIG_MMU |
| 20 | |
| 21 | #include <linux/pagemap.h> |
| 22 | |
| 23 | #define tlb_flush(tlb) ((void) tlb) |
| 24 | |
| 25 | #include <asm-generic/tlb.h> |
| 26 | |
| 27 | #else /* !CONFIG_MMU */ |
| 28 | |
| 29 | #include <asm/tlbflush.h> |
| 30 | #include <asm-generic/tlb.h> |
| 31 | |
| 32 | static inline void |
| 33 | __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr) |
| 34 | { |
| 35 | struct ptdesc *ptdesc = page_ptdesc(pte); |
| 36 | |
| 37 | #ifndef CONFIG_ARM_LPAE |
| 38 | /* |
| 39 | * With the classic ARM MMU, a pte page has two corresponding pmd |
| 40 | * entries, each covering 1MB. |
| 41 | */ |
| 42 | addr = (addr & PMD_MASK) + SZ_1M; |
| 43 | __tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE); |
| 44 | #endif |
| 45 | |
| 46 | tlb_remove_ptdesc(tlb, ptdesc); |
| 47 | } |
| 48 | |
| 49 | static inline void |
| 50 | __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr) |
| 51 | { |
| 52 | #ifdef CONFIG_ARM_LPAE |
| 53 | struct ptdesc *ptdesc = virt_to_ptdesc(pmdp); |
| 54 | |
| 55 | tlb_remove_ptdesc(tlb, ptdesc); |
| 56 | #endif |
| 57 | } |
| 58 | |
| 59 | #endif /* CONFIG_MMU */ |
| 60 | #endif |
| 61 |
Warning: This file is not a C or C++ file. It does not have highlighting.