text: /* SPDX-License-Identifier: GPL-2.0-only */
  /*
   *  arch/arm/include/asm/tlb.h
   *
   *  Copyright (C) 2002 Russell King
   *
   *  Experimentation shows that on a StrongARM, it appears to be faster
   *  to use the "invalidate whole tlb" rather than "invalidate single
   *  tlb" for this.
   *
   *  This appears true for both the process fork+exit case, as well as
   *  the munmap-large-area case.
   */
  #ifndef __ASMARM_TLB_H
  #define __ASMARM_TLB_H
  
  #include <asm/cacheflush.h>
  
  #ifndef CONFIG_MMU
  
  #include <linux/pagemap.h>
  
  #define tlb_flush(tlb)	((void) tlb)
  
  #include <asm-generic/tlb.h>
  
  #else /* !CONFIG_MMU */
  
  #include <linux/swap.h>
  #include <asm/pgalloc.h>
  #include <asm/tlbflush.h>
  
  static inline void __tlb_remove_table(void *_table)
  {
  	free_page_and_swap_cache((struct page *)_table);
  }
  
  #include <asm-generic/tlb.h>
  
  #ifndef CONFIG_HAVE_RCU_TABLE_FREE
  #define tlb_remove_table(tlb, entry) tlb_remove_page(tlb, entry)
  #endif
  
  static inline void
  __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
  {
  	pgtable_page_dtor(pte);
  
  #ifndef CONFIG_ARM_LPAE
  	/*
  	 * With the classic ARM MMU, a pte page has two corresponding pmd
  	 * entries, each covering 1MB.
  	 */
  	addr = (addr & PMD_MASK) + SZ_1M;
  	__tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE);
  #endif
  
  	tlb_remove_table(tlb, pte);
  }
  
  static inline void
  __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr)
  {
  #ifdef CONFIG_ARM_LPAE
  	struct page *page = virt_to_page(pmdp);
  
  	tlb_remove_table(tlb, page);
  #endif
  }
  
  #endif /* CONFIG_MMU */
  #endif
  