51 строка
1.5 KiB
C
51 строка
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_IA64_TLB_H
|
|
#define _ASM_IA64_TLB_H
|
|
/*
|
|
* Based on <asm-generic/tlb.h>.
|
|
*
|
|
* Copyright (C) 2002-2003 Hewlett-Packard Co
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
*/
|
|
/*
|
|
* Removing a translation from a page table (including TLB-shootdown) is a four-step
|
|
* procedure:
|
|
*
|
|
* (1) Flush (virtual) caches --- ensures virtual memory is coherent with kernel memory
|
|
* (this is a no-op on ia64).
|
|
* (2) Clear the relevant portions of the page-table
|
|
* (3) Flush the TLBs --- ensures that stale content is gone from CPU TLBs
|
|
* (4) Release the pages that were freed up in step (2).
|
|
*
|
|
* Note that the ordering of these steps is crucial to avoid races on MP machines.
|
|
*
|
|
* The Linux kernel defines several platform-specific hooks for TLB-shootdown. When
|
|
* unmapping a portion of the virtual address space, these hooks are called according to
|
|
* the following template:
|
|
*
|
|
* tlb <- tlb_gather_mmu(mm); // start unmap for address space MM
|
|
* {
|
|
* for each vma that needs a shootdown do {
|
|
* tlb_start_vma(tlb, vma);
|
|
* for each page-table-entry PTE that needs to be removed do {
|
|
* tlb_remove_tlb_entry(tlb, pte, address);
|
|
* if (pte refers to a normal page) {
|
|
* tlb_remove_page(tlb, page);
|
|
* }
|
|
* }
|
|
* tlb_end_vma(tlb, vma);
|
|
* }
|
|
* }
|
|
* tlb_finish_mmu(tlb); // finish unmap for address space MM
|
|
*/
|
|
#include <linux/mm.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/swap.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
#include <asm-generic/tlb.h>
|
|
|
|
#endif /* _ASM_IA64_TLB_H */
|