LXR linux/arch/arm64/include/asm/tlb.h

   1/*
   2 * Based on arch/arm/include/asm/tlb.h
   3 *
   4 * Copyright (C) 2002 Russell King
   5 * Copyright (C) 2012 ARM Ltd.
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19#ifndef __ASM_TLB_H
  20#define __ASM_TLB_H
  21
  22#include <linux/pagemap.h>
  23#include <linux/swap.h>
  24
  25static inline void __tlb_remove_table(void *_table)
  26{
  27        free_page_and_swap_cache((struct page *)_table);
  28}
  29
  30#define tlb_flush tlb_flush
  31static void tlb_flush(struct mmu_gather *tlb);
  32
  33#include <asm-generic/tlb.h>
  34
  35static inline void tlb_flush(struct mmu_gather *tlb)
  36{
  37        struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
  38
  39        /*
  40         * The ASID allocator will either invalidate the ASID or mark
  41         * it as used.
  42         */
  43        if (tlb->fullmm)
  44                return;
  45
  46        /*
  47         * The intermediate page table levels are already handled by
  48         * the __(pte|pmd|pud)_free_tlb() functions, so last level
  49         * TLBI is sufficient here.
  50         */
  51        __flush_tlb_range(&vma, tlb->start, tlb->end, PAGE_SIZE, true);
  52}
  53
  54static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
  55                                  unsigned long addr)
  56{
  57        __flush_tlb_pgtable(tlb->mm, addr);
  58        pgtable_page_dtor(pte);
  59        tlb_remove_table(tlb, pte);
  60}
  61
  62#if CONFIG_PGTABLE_LEVELS > 2
  63static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
  64                                  unsigned long addr)
  65{
  66        __flush_tlb_pgtable(tlb->mm, addr);
  67        tlb_remove_table(tlb, virt_to_page(pmdp));
  68}
  69#endif
  70
  71#if CONFIG_PGTABLE_LEVELS > 3
  72static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
  73                                  unsigned long addr)
  74{
  75        __flush_tlb_pgtable(tlb->mm, addr);
  76        tlb_remove_table(tlb, virt_to_page(pudp));
  77}
  78#endif
  79
  80#endif
  81