LXR linux/arch/ia64/include/asm/tlbflush.h

   1#ifndef _ASM_IA64_TLBFLUSH_H
   2#define _ASM_IA64_TLBFLUSH_H
   3
   4/*
   5 * Copyright (C) 2002 Hewlett-Packard Co
   6 *      David Mosberger-Tang <davidm@hpl.hp.com>
   7 */
   8
   9
  10#include <linux/mm.h>
  11
  12#include <asm/intrinsics.h>
  13#include <asm/mmu_context.h>
  14#include <asm/page.h>
  15
  16/*
  17 * Now for some TLB flushing routines.  This is the kind of stuff that
  18 * can be very expensive, so try to avoid them whenever possible.
  19 */
  20extern void setup_ptcg_sem(int max_purges, int from_palo);
  21
  22/*
  23 * Flush everything (kernel mapping may also have changed due to
  24 * vmalloc/vfree).
  25 */
  26extern void local_flush_tlb_all (void);
  27
  28#ifdef CONFIG_SMP
  29  extern void smp_flush_tlb_all (void);
  30  extern void smp_flush_tlb_mm (struct mm_struct *mm);
  31  extern void smp_flush_tlb_cpumask (cpumask_t xcpumask);
  32# define flush_tlb_all()        smp_flush_tlb_all()
  33#else
  34# define flush_tlb_all()        local_flush_tlb_all()
  35# define smp_flush_tlb_cpumask(m) local_flush_tlb_all()
  36#endif
  37
  38static inline void
  39local_finish_flush_tlb_mm (struct mm_struct *mm)
  40{
  41        if (mm == current->active_mm)
  42                activate_context(mm);
  43}
  44
  45/*
  46 * Flush a specified user mapping.  This is called, e.g., as a result of fork() and
  47 * exit().  fork() ends up here because the copy-on-write mechanism needs to write-protect
  48 * the PTEs of the parent task.
  49 */
  50static inline void
  51flush_tlb_mm (struct mm_struct *mm)
  52{
  53        if (!mm)
  54                return;
  55
  56        set_bit(mm->context, ia64_ctx.flushmap);
  57        mm->context = 0;
  58
  59        if (atomic_read(&mm->mm_users) == 0)
  60                return;         /* happens as a result of exit_mmap() */
  61
  62#ifdef CONFIG_SMP
  63        smp_flush_tlb_mm(mm);
  64#else
  65        local_finish_flush_tlb_mm(mm);
  66#endif
  67}
  68
  69extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end);
  70
  71/*
  72 * Page-granular tlb flush.
  73 */
  74static inline void
  75flush_tlb_page (struct vm_area_struct *vma, unsigned long addr)
  76{
  77#ifdef CONFIG_SMP
  78        flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE);
  79#else
  80        if (vma->vm_mm == current->active_mm)
  81                ia64_ptcl(addr, (PAGE_SHIFT << 2));
  82        else
  83                vma->vm_mm->context = 0;
  84#endif
  85}
  86
  87/*
  88 * Flush the local TLB. Invoked from another cpu using an IPI.
  89 */
  90#ifdef CONFIG_SMP
  91void smp_local_flush_tlb(void);
  92#else
  93#define smp_local_flush_tlb()
  94#endif
  95
  96static inline void flush_tlb_kernel_range(unsigned long start,
  97                                          unsigned long end)
  98{
  99        flush_tlb_all();        /* XXX fix me */
 100}
 101
 102#endif /* _ASM_IA64_TLBFLUSH_H */
 103