LXR linux/arch/mn10300/include/asm/tlbflush.h

   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()                                           \
  17do {                                                            \
  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()                         \
  44do {                                            \
  45        preempt_disable();                      \
  46        __flush_tlb_all();                      \
  47        preempt_enable();                       \
  48} while (0)
  49
  50#define flush_tlb_mm(mm)                        \
  51do {                                            \
  52        preempt_disable();                      \
  53        __flush_tlb_all();                      \
  54        preempt_enable();                       \
  55} while (0)
  56
  57#define flush_tlb_range(vma, start, end)                        \
  58do {                                                            \
  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)                      \
  70do {                                                            \
  71        unsigned long __s __attribute__((unused)) = (start);    \
  72        unsigned long __e __attribute__((unused)) = (end);      \
  73        flush_tlb_all();                                        \
  74} while (0)
  75
  76extern 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 */
  81