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

   1/*
   2 *      TLB shootdown specifics for powerpc
   3 *
   4 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
   5 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License
   9 * as published by the Free Software Foundation; either version
  10 * 2 of the License, or (at your option) any later version.
  11 */
  12#ifndef _ASM_POWERPC_TLB_H
  13#define _ASM_POWERPC_TLB_H
  14#ifdef __KERNEL__
  15
  16#ifndef __powerpc64__
  17#include <asm/pgtable.h>
  18#endif
  19#include <asm/pgalloc.h>
  20#include <asm/tlbflush.h>
  21#ifndef __powerpc64__
  22#include <asm/page.h>
  23#include <asm/mmu.h>
  24#endif
  25
  26#include <linux/pagemap.h>
  27
  28struct mmu_gather;
  29
  30#define tlb_start_vma(tlb, vma) do { } while (0)
  31#define tlb_end_vma(tlb, vma)   do { } while (0)
  32
  33#if !defined(CONFIG_PPC_STD_MMU)
  34
  35#define tlb_flush(tlb)                  flush_tlb_mm((tlb)->mm)
  36
  37#elif defined(__powerpc64__)
  38
  39extern void pte_free_finish(void);
  40
  41static inline void tlb_flush(struct mmu_gather *tlb)
  42{
  43        struct ppc64_tlb_batch *tlbbatch = &__get_cpu_var(ppc64_tlb_batch);
  44
  45        /* If there's a TLB batch pending, then we must flush it because the
  46         * pages are going to be freed and we really don't want to have a CPU
  47         * access a freed page because it has a stale TLB
  48         */
  49        if (tlbbatch->index)
  50                __flush_tlb_pending(tlbbatch);
  51
  52        pte_free_finish();
  53}
  54
  55#else
  56
  57extern void tlb_flush(struct mmu_gather *tlb);
  58
  59#endif
  60
  61/* Get the generic bits... */
  62#include <asm-generic/tlb.h>
  63
  64#if !defined(CONFIG_PPC_STD_MMU) || defined(__powerpc64__)
  65
  66#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
  67
  68#else
  69extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
  70                             unsigned long address);
  71
  72static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
  73                                        unsigned long address)
  74{
  75        if (pte_val(*ptep) & _PAGE_HASHPTE)
  76                flush_hash_entry(tlb->mm, ptep, address);
  77}
  78
  79#endif
  80#endif /* __KERNEL__ */
  81#endif /* __ASM_POWERPC_TLB_H */
  82