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   1 /* MN10300 TLB flushing functions
   2  *
   3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #ifndef _ASM_TLBFLUSH_H
  12 #define _ASM_TLBFLUSH_H
  13
  14 #include <asm/processor.h>
  15
  16 #define __flush_tlb()                                           \
  17 do {                                                            \
  18         int w;                                                  \
  19         __asm__ __volatile__                                    \
  20                 ("      mov %1,%0               \n"             \
  21                  "      or %2,%0                \n"             \
  22                  "      mov %0,%1               \n"             \
  23                  : "=d"(w)                                      \
  24                  : "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV)      \
  25                  : "memory"                                     \
  26                  );                                             \
  27 } while (0)
  28
  29 #define __flush_tlb_all() __flush_tlb()
  30 #define __flush_tlb_one(addr) __flush_tlb()
  31
  32
  33 /*
  34  * TLB flushing:
  35  *
  36  *  - flush_tlb() flushes the current mm struct TLBs
  37  *  - flush_tlb_all() flushes all processes TLBs
  38  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  39  *  - flush_tlb_page(vma, vmaddr) flushes one page
  40  *  - flush_tlb_range(mm, start, end) flushes a range of pages
  41  *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
  42  */
  43 #define flush_tlb_all()                         \
  44 do {                                            \
  45         preempt_disable();                      \
  46         __flush_tlb_all();                      \
  47         preempt_enable();                       \
  48 } while (0)
  49
  50 #define flush_tlb_mm(mm)                        \
  51 do {                                            \
  52         preempt_disable();                      \
  53         __flush_tlb_all();                      \
  54         preempt_enable();                       \
  55 } while (0)
  56
  57 #define flush_tlb_range(vma, start, end)                        \
  58 do {                                                            \
  59         unsigned long __s __attribute__((unused)) = (start);    \
  60         unsigned long __e __attribute__((unused)) = (end);      \
  61         preempt_disable();                                      \
  62         __flush_tlb_all();                                      \
  63         preempt_enable();                                       \
  64 } while (0)
  65
  66
  67 #define __flush_tlb_global()                    flush_tlb_all()
  68 #define flush_tlb()                             flush_tlb_all()
  69 #define flush_tlb_kernel_range(start, end)                      \
  70 do {                                                            \
  71         unsigned long __s __attribute__((unused)) = (start);    \
  72         unsigned long __e __attribute__((unused)) = (end);      \
  73         flush_tlb_all();                                        \
  74 } while (0)
  75
  76 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
  77
  78 #define flush_tlb_pgtables(mm, start, end)      do {} while (0)
  79
  80 #endif /* _ASM_TLBFLUSH_H */