include/asm-ppc/tlb.h

   1 /*
   2  *      TLB shootdown specifics for PPC
   3  *
   4  * Copyright (C) 2002 Paul Mackerras, IBM Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11 #ifndef _PPC_TLB_H
  12 #define _PPC_TLB_H
  13
  14 #include <linux/config.h>
  15 #include <asm/pgtable.h>
  16 #include <asm/pgalloc.h>
  17 #include <asm/tlbflush.h>
  18 #include <asm/page.h>
  19 #include <asm/mmu.h>
  20
  21 #ifdef CONFIG_PPC_STD_MMU
  22 /* Classic PPC with hash-table based MMU... */
  23
  24 struct mmu_gather;
  25 extern void tlb_flush(struct mmu_gather *tlb);
  26
  27 /* Get the generic bits... */
  28 #include <asm-generic/tlb.h>
  29
  30 /* Nothing needed here in fact... */
  31 #define tlb_start_vma(tlb, vma) do { } while (0)
  32 #define tlb_end_vma(tlb, vma)   do { } while (0)
  33
  34 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
  35                              unsigned long address);
  36
  37 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
  38                                         unsigned long address)
  39 {
  40         if (pte_val(*ptep) & _PAGE_HASHPTE)
  41                 flush_hash_entry(tlb->mm, ptep, address);
  42 }
  43
  44 #else
  45 /* Embedded PPC with software-loaded TLB, very simple... */
  46
  47 #define tlb_start_vma(tlb, vma)         do { } while (0)
  48 #define tlb_end_vma(tlb, vma)           do { } while (0)
  49 #define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
  50 #define tlb_flush(tlb)                  flush_tlb_mm((tlb)->mm)
  51
  52 /* Get the generic bits... */
  53 #include <asm-generic/tlb.h>
  54
  55 #endif /* CONFIG_PPC_STD_MMU */
  56
  57 #endif /* __PPC_TLB_H */