2 * arch/arm/include/asm/tlb.h
4 * Copyright (C) 2002 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Experimentation shows that on a StrongARM, it appears to be faster
11 * to use the "invalidate whole tlb" rather than "invalidate single
14 * This appears true for both the process fork+exit case, as well as
15 * the munmap-large-area case.
17 #ifndef __ASMARM_TLB_H
18 #define __ASMARM_TLB_H
20 #include <asm/cacheflush.h>
24 #include <linux/pagemap.h>
26 #define tlb_flush(tlb) ((void) tlb)
28 #include <asm-generic/tlb.h>
30 #else /* !CONFIG_MMU */
32 #include <linux/swap.h>
33 #include <asm/pgalloc.h>
34 #include <asm/tlbflush.h>
36 static inline void __tlb_remove_table(void *_table)
38 free_page_and_swap_cache((struct page *)_table);
41 #include <asm-generic/tlb.h>
43 #ifndef CONFIG_HAVE_RCU_TABLE_FREE
44 #define tlb_remove_table(tlb, entry) tlb_remove_page(tlb, entry)
48 __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
50 pgtable_page_dtor(pte);
52 #ifndef CONFIG_ARM_LPAE
54 * With the classic ARM MMU, a pte page has two corresponding pmd
55 * entries, each covering 1MB.
57 addr = (addr & PMD_MASK) + SZ_1M;
58 __tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE);
61 tlb_remove_table(tlb, pte);
65 __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr)
67 #ifdef CONFIG_ARM_LPAE
68 struct page *page = virt_to_page(pmdp);
70 tlb_remove_table(tlb, page);
74 #endif /* CONFIG_MMU */