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
  33 extern void tlb_flush(struct mmu_gather *tlb);
  34
  35 /* Get the generic bits... */
  36 #include <asm-generic/tlb.h>
  37
  38 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
  39                              unsigned long address);
  40
  41 static 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
  50 static 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
  66 static 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
  73 static 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 */
  80 static 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 */
  88 static inline int mm_is_core_local(struct mm_struct *mm)
  89 {
  90         return 1;
  91 }
  92
  93 static 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 */