LXR linux/arch/um/include/asm/mmu

   1/* 
   2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3 * Licensed under the GPL
   4 */
   5
   6#ifndef __UM_MMU_CONTEXT_H
   7#define __UM_MMU_CONTEXT_H
   8
   9#include <linux/sched.h>
  10#include <asm/mmu.h>
  11
  12extern void uml_setup_stubs(struct mm_struct *mm);
  13/*
  14 * Needed since we do not use the asm-generic/mm_hooks.h:
  15 */
  16static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
  17{
  18        uml_setup_stubs(mm);
  19}
  20extern void arch_exit_mmap(struct mm_struct *mm);
  21static inline void arch_unmap(struct mm_struct *mm,
  22                        struct vm_area_struct *vma,
  23                        unsigned long start, unsigned long end)
  24{
  25}
  26static inline void arch_bprm_mm_init(struct mm_struct *mm,
  27                                     struct vm_area_struct *vma)
  28{
  29}
  30/*
  31 * end asm-generic/mm_hooks.h functions
  32 */
  33
  34#define deactivate_mm(tsk,mm)   do { } while (0)
  35
  36extern void force_flush_all(void);
  37
  38static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
  39{
  40        /*
  41         * This is called by fs/exec.c and sys_unshare()
  42         * when the new ->mm is used for the first time.
  43         */
  44        __switch_mm(&new->context.id);
  45        down_write(&new->mmap_sem);
  46        uml_setup_stubs(new);
  47        up_write(&new->mmap_sem);
  48}
  49
  50static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
  51                             struct task_struct *tsk)
  52{
  53        unsigned cpu = smp_processor_id();
  54
  55        if(prev != next){
  56                cpumask_clear_cpu(cpu, mm_cpumask(prev));
  57                cpumask_set_cpu(cpu, mm_cpumask(next));
  58                if(next != &init_mm)
  59                        __switch_mm(&next->context.id);
  60        }
  61}
  62
  63static inline void enter_lazy_tlb(struct mm_struct *mm, 
  64                                  struct task_struct *tsk)
  65{
  66}
  67
  68extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
  69
  70extern void destroy_context(struct mm_struct *mm);
  71
  72#endif
  73