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
  28#define tlb_start_vma(tlb, vma) do { } while (0)
  29#define tlb_end_vma(tlb, vma)   do { } while (0)
  30#define __tlb_remove_tlb_entry  __tlb_remove_tlb_entry
  31#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
  32
  33extern void tlb_flush(struct mmu_gather *tlb);
  34
  35/* Get the generic bits... */
  36#include <asm-generic/tlb.h>
  37
  38extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
  39                             unsigned long address);
  40
  41static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
  42                                          unsigned long address)
  43{
  44#ifdef CONFIG_PPC_STD_MMU_32
  45        if (pte_val(*ptep) & _PAGE_HASHPTE)
  46                flush_hash_entry(tlb->mm, ptep, address);
  47#endif
  48}
  49
  50static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
  51                                                     unsigned int page_size)
  52{
  53        if (!tlb->page_size)
  54                tlb->page_size = page_size;
  55        else if (tlb->page_size != page_size) {
  56                tlb_flush_mmu(tlb);
  57                /*
  58                 * update the page size after flush for the new
  59                 * mmu_gather.
  60                 */
  61                tlb->page_size = page_size;
  62        }
  63}
  64
  65#ifdef CONFIG_SMP
  66static inline int mm_is_core_local(struct mm_struct *mm)
  67{
  68        return cpumask_subset(mm_cpumask(mm),
  69                              topology_sibling_cpumask(smp_processor_id()));
  70}
  71
  72#ifdef CONFIG_PPC_BOOK3S_64
  73static inline int mm_is_thread_local(struct mm_struct *mm)
  74{
  75        if (atomic_read(&mm->context.active_cpus) > 1)
  76                return false;
  77        return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
  78}
  79#else /* CONFIG_PPC_BOOK3S_64 */
  80static inline int mm_is_thread_local(struct mm_struct *mm)
  81{
  82        return cpumask_equal(mm_cpumask(mm),
  83                              cpumask_of(smp_processor_id()));
  84}
  85#endif /* !CONFIG_PPC_BOOK3S_64 */
  86
  87#else /* CONFIG_SMP */
  88static inline int mm_is_core_local(struct mm_struct *mm)
  89{
  90        return 1;
  91}
  92
  93static inline int mm_is_thread_local(struct mm_struct *mm)
  94{
  95        return 1;
  96}
  97#endif
  98
  99#endif /* __KERNEL__ */
 100#endif /* __ASM_POWERPC_TLB_H */
 101