1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * arch/arm/include/asm/tlb.h
5 * Copyright (C) 2002 Russell King
7 * Experimentation shows that on a StrongARM, it appears to be faster
8 * to use the "invalidate whole tlb" rather than "invalidate single
11 * This appears true for both the process fork+exit case, as well as
12 * the munmap-large-area case.
14 #ifndef __ASMARM_TLB_H
15 #define __ASMARM_TLB_H
17 #include <asm/cacheflush.h>
21 #include <linux/pagemap.h>
23 #define tlb_flush(tlb) ((void) tlb)
25 #include <asm-generic/tlb.h>
27 #else /* !CONFIG_MMU */
29 #include <linux/swap.h>
30 #include <asm/pgalloc.h>
31 #include <asm/tlbflush.h>
33 static inline void __tlb_remove_table(void *_table)
35 free_page_and_swap_cache((struct page *)_table);
38 #include <asm-generic/tlb.h>
40 #ifndef CONFIG_HAVE_RCU_TABLE_FREE
41 #define tlb_remove_table(tlb, entry) tlb_remove_page(tlb, entry)
45 __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
47 pgtable_pte_page_dtor(pte);
49 #ifndef CONFIG_ARM_LPAE
51 * With the classic ARM MMU, a pte page has two corresponding pmd
52 * entries, each covering 1MB.
54 addr = (addr & PMD_MASK) + SZ_1M;
55 __tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE);
58 tlb_remove_table(tlb, pte);
62 __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr)
64 #ifdef CONFIG_ARM_LPAE
65 struct page *page = virt_to_page(pmdp);
67 tlb_remove_table(tlb, page);
71 #endif /* CONFIG_MMU */