1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_IA64_TLB_H
 3#define _ASM_IA64_TLB_H
 4/*
 5 * Based on <asm-generic/tlb.h>.
 6 *
 7 * Copyright (C) 2002-2003 Hewlett-Packard Co
 8 *	David Mosberger-Tang <davidm@hpl.hp.com>
 9 */
10/*
11 * Removing a translation from a page table (including TLB-shootdown) is a four-step
12 * procedure:
13 *
14 *	(1) Flush (virtual) caches --- ensures virtual memory is coherent with kernel memory
15 *	    (this is a no-op on ia64).
16 *	(2) Clear the relevant portions of the page-table
17 *	(3) Flush the TLBs --- ensures that stale content is gone from CPU TLBs
18 *	(4) Release the pages that were freed up in step (2).
19 *
20 * Note that the ordering of these steps is crucial to avoid races on MP machines.
21 *
22 * The Linux kernel defines several platform-specific hooks for TLB-shootdown.  When
23 * unmapping a portion of the virtual address space, these hooks are called according to
24 * the following template:
25 *
26 *	tlb <- tlb_gather_mmu(mm, start, end);		// start unmap for address space MM
27 *	{
28 *	  for each vma that needs a shootdown do {
29 *	    tlb_start_vma(tlb, vma);
30 *	      for each page-table-entry PTE that needs to be removed do {
31 *		tlb_remove_tlb_entry(tlb, pte, address);
32 *		if (pte refers to a normal page) {
33 *		  tlb_remove_page(tlb, page);
34 *		}
35 *	      }
36 *	    tlb_end_vma(tlb, vma);
37 *	  }
38 *	}
39 *	tlb_finish_mmu(tlb, start, end);	// finish unmap for address space MM
40 */
41#include <linux/mm.h>
42#include <linux/pagemap.h>
43#include <linux/swap.h>
44
45#include <asm/processor.h>
46#include <asm/tlbflush.h>
47
48#include <asm-generic/tlb.h>
49
50#endif /* _ASM_IA64_TLB_H */