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 extern void force_flush_all(void);
  20
  21 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
  22 {
  23         if (old != new)
  24                 force_flush_all();
  25 }
  26
  27 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
  28                              struct task_struct *tsk)
  29 {
  30         unsigned cpu = smp_processor_id();
  31
  32         if(prev != next){
  33                 cpu_clear(cpu, prev->cpu_vm_mask);
  34                 cpu_set(cpu, next->cpu_vm_mask);
  35                 if(next != &init_mm)
  36                         CHOOSE_MODE((void) 0,
  37                                     switch_mm_skas(&next->context.skas.id));
  38         }
  39 }
  40
  41 static inline void enter_lazy_tlb(struct mm_struct *mm,
  42                                   struct task_struct *tsk)
  43 {
  44 }
  45
  46 extern int init_new_context_skas(struct task_struct *task,
  47                                  struct mm_struct *mm);
  48
  49 static inline int init_new_context_tt(struct task_struct *task,
  50                                       struct mm_struct *mm)
  51 {
  52         return(0);
  53 }
  54
  55 static inline int init_new_context(struct task_struct *task,
  56                                    struct mm_struct *mm)
  57 {
  58         return(CHOOSE_MODE_PROC(init_new_context_tt, init_new_context_skas,
  59                                 task, mm));
  60 }
  61
  62 extern void destroy_context_skas(struct mm_struct *mm);
  63
  64 static inline void destroy_context(struct mm_struct *mm)
  65 {
  66         CHOOSE_MODE((void) 0, destroy_context_skas(mm));
  67 }
  68
  69 #endif
  70
  71 /*
  72  * Overrides for Emacs so that we follow Linus's tabbing style.
  73  * Emacs will notice this stuff at the end of the file and automatically
  74  * adjust the settings for this buffer only.  This must remain at the end
  75  * of the file.
  76  * ---------------------------------------------------------------------------
  77  * Local variables:
  78  * c-file-style: "linux"
  79  * End:
  80  */