include/asm-sparc/mmu_context.h

   1 #ifndef __SPARC_MMU_CONTEXT_H
   2 #define __SPARC_MMU_CONTEXT_H
   3
   4 #include <asm/btfixup.h>
   5
   6 #ifndef __ASSEMBLY__
   7
   8 #include <asm-generic/mm_hooks.h>
   9
  10 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
  11 {
  12 }
  13
  14 /*
  15  * Initialize a new mmu context.  This is invoked when a new
  16  * address space instance (unique or shared) is instantiated.
  17  */
  18 #define init_new_context(tsk, mm) (((mm)->context = NO_CONTEXT), 0)
  19
  20 /*
  21  * Destroy a dead context.  This occurs when mmput drops the
  22  * mm_users count to zero, the mmaps have been released, and
  23  * all the page tables have been flushed.  Our job is to destroy
  24  * any remaining processor-specific state.
  25  */
  26 BTFIXUPDEF_CALL(void, destroy_context, struct mm_struct *)
  27
  28 #define destroy_context(mm) BTFIXUP_CALL(destroy_context)(mm)
  29
  30 /* Switch the current MM context. */
  31 BTFIXUPDEF_CALL(void, switch_mm, struct mm_struct *, struct mm_struct *, struct task_struct *)
  32
  33 #define switch_mm(old_mm, mm, tsk) BTFIXUP_CALL(switch_mm)(old_mm, mm, tsk)
  34
  35 #define deactivate_mm(tsk,mm)   do { } while (0)
  36
  37 /* Activate a new MM instance for the current task. */
  38 #define activate_mm(active_mm, mm) switch_mm((active_mm), (mm), NULL)
  39
  40 #endif /* !(__ASSEMBLY__) */
  41
  42 #endif /* !(__SPARC_MMU_CONTEXT_H) */