include/asm-um/mmu_context.h

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.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 "linux/config.h"
  11 #include "choose-mode.h"
  12 #include "um_mmu.h"
  13
  14 #define get_mmu_context(task) do ; while(0)
  15 #define activate_context(tsk) do ; while(0)
  16
  17 #define deactivate_mm(tsk,mm)   do { } while (0)
  18
  19 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
  20 {
  21 }
  22
  23 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
  24                              struct task_struct *tsk)
  25 {
  26         unsigned cpu = smp_processor_id();
  27
  28         if(prev != next){
  29                 cpu_clear(cpu, prev->cpu_vm_mask);
  30                 cpu_set(cpu, next->cpu_vm_mask);
  31                 if(next != &init_mm)
  32                         CHOOSE_MODE((void) 0,
  33                                     switch_mm_skas(&next->context.skas.id));
  34         }
  35 }
  36
  37 static inline void enter_lazy_tlb(struct mm_struct *mm,
  38                                   struct task_struct *tsk)
  39 {
  40 }
  41
  42 extern int init_new_context_skas(struct task_struct *task,
  43                                  struct mm_struct *mm);
  44
  45 static inline int init_new_context_tt(struct task_struct *task,
  46                                       struct mm_struct *mm)
  47 {
  48         return(0);
  49 }
  50
  51 static inline int init_new_context(struct task_struct *task,
  52                                    struct mm_struct *mm)
  53 {
  54         return(CHOOSE_MODE_PROC(init_new_context_tt, init_new_context_skas,
  55                                 task, mm));
  56 }
  57
  58 extern void destroy_context_skas(struct mm_struct *mm);
  59
  60 static inline void destroy_context(struct mm_struct *mm)
  61 {
  62         CHOOSE_MODE((void) 0, destroy_context_skas(mm));
  63 }
  64
  65 #endif
  66
  67 /*
  68  * Overrides for Emacs so that we follow Linus's tabbing style.
  69  * Emacs will notice this stuff at the end of the file and automatically
  70  * adjust the settings for this buffer only.  This must remain at the end
  71  * of the file.
  72  * ---------------------------------------------------------------------------
  73  * Local variables:
  74  * c-file-style: "linux"
  75  * End:
  76  */