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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
32static 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
49static 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