include/asm-ppc/tlbflush.h

   1 /*
   2  * include/asm-ppc/tlbflush.h
   3  *
   4  *  This program is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU General Public License
   6  *  as published by the Free Software Foundation; either version
   7  *  2 of the License, or (at your option) any later version.
   8  */
   9 #ifdef __KERNEL__
  10 #ifndef _PPC_TLBFLUSH_H
  11 #define _PPC_TLBFLUSH_H
  12
  13 #include <linux/config.h>
  14 #include <linux/mm.h>
  15
  16 extern void _tlbie(unsigned long address);
  17 extern void _tlbia(void);
  18
  19 #if defined(CONFIG_4xx)
  20
  21 #ifndef CONFIG_44x
  22 #define __tlbia()       asm volatile ("sync; tlbia; isync" : : : "memory")
  23 #else
  24 #define __tlbia         _tlbia
  25 #endif
  26
  27 static inline void flush_tlb_mm(struct mm_struct *mm)
  28         { __tlbia(); }
  29 static inline void flush_tlb_page(struct vm_area_struct *vma,
  30                                 unsigned long vmaddr)
  31         { _tlbie(vmaddr); }
  32 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
  33                                          unsigned long vmaddr)
  34         { _tlbie(vmaddr); }
  35 static inline void flush_tlb_range(struct vm_area_struct *vma,
  36                                 unsigned long start, unsigned long end)
  37         { __tlbia(); }
  38 static inline void flush_tlb_kernel_range(unsigned long start,
  39                                 unsigned long end)
  40         { __tlbia(); }
  41
  42 #elif defined(CONFIG_FSL_BOOKE)
  43
  44 /* TODO: determine if flush_tlb_range & flush_tlb_kernel_range
  45  * are best implemented as tlbia vs specific tlbie's */
  46
  47 #define __tlbia()       _tlbia()
  48
  49 static inline void flush_tlb_mm(struct mm_struct *mm)
  50         { __tlbia(); }
  51 static inline void flush_tlb_page(struct vm_area_struct *vma,
  52                                 unsigned long vmaddr)
  53         { _tlbie(vmaddr); }
  54 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
  55                                          unsigned long vmaddr)
  56         { _tlbie(vmaddr); }
  57 static inline void flush_tlb_range(struct vm_area_struct *vma,
  58                                 unsigned long start, unsigned long end)
  59         { __tlbia(); }
  60 static inline void flush_tlb_kernel_range(unsigned long start,
  61                                 unsigned long end)
  62         { __tlbia(); }
  63
  64 #elif defined(CONFIG_8xx)
  65 #define __tlbia()       asm volatile ("tlbia; sync" : : : "memory")
  66
  67 static inline void flush_tlb_mm(struct mm_struct *mm)
  68         { __tlbia(); }
  69 static inline void flush_tlb_page(struct vm_area_struct *vma,
  70                                 unsigned long vmaddr)
  71         { _tlbie(vmaddr); }
  72 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
  73                                          unsigned long vmaddr)
  74         { _tlbie(vmaddr); }
  75 static inline void flush_tlb_range(struct mm_struct *mm,
  76                                 unsigned long start, unsigned long end)
  77         { __tlbia(); }
  78 static inline void flush_tlb_kernel_range(unsigned long start,
  79                                 unsigned long end)
  80         { __tlbia(); }
  81
  82 #else   /* 6xx, 7xx, 7xxx cpus */
  83 struct mm_struct;
  84 struct vm_area_struct;
  85 extern void flush_tlb_mm(struct mm_struct *mm);
  86 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  87 extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
  88 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
  89                             unsigned long end);
  90 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
  91 #endif
  92
  93 /*
  94  * This is called in munmap when we have freed up some page-table
  95  * pages.  We don't need to do anything here, there's nothing special
  96  * about our page-table pages.  -- paulus
  97  */
  98 static inline void flush_tlb_pgtables(struct mm_struct *mm,
  99                                       unsigned long start, unsigned long end)
 100 {
 101 }
 102
 103 /*
 104  * This gets called at the end of handling a page fault, when
 105  * the kernel has put a new PTE into the page table for the process.
 106  * We use it to ensure coherency between the i-cache and d-cache
 107  * for the page which has just been mapped in.
 108  * On machines which use an MMU hash table, we use this to put a
 109  * corresponding HPTE into the hash table ahead of time, instead of
 110  * waiting for the inevitable extra hash-table miss exception.
 111  */
 112 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 113
 114 #endif /* _PPC_TLBFLUSH_H */
 115 #endif /*__KERNEL__ */