arch/openrisc/include/asm/mmu_context.h

   1 /*
   2  * OpenRISC Linux
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * OpenRISC implementation:
   9  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  10  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11  * et al.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #ifndef __ASM_OPENRISC_MMU_CONTEXT_H
  20 #define __ASM_OPENRISC_MMU_CONTEXT_H
  21
  22 #include <asm-generic/mm_hooks.h>
  23
  24 extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
  25 extern void destroy_context(struct mm_struct *mm);
  26 extern void switch_mm(struct mm_struct *prev, struct mm_struct *next,
  27                       struct task_struct *tsk);
  28
  29 #define deactivate_mm(tsk, mm)  do { } while (0)
  30
  31 #define activate_mm(prev, next) switch_mm((prev), (next), NULL)
  32
  33 /* current active pgd - this is similar to other processors pgd
  34  * registers like cr3 on the i386
  35  */
  36
  37 extern volatile pgd_t *current_pgd;   /* defined in arch/openrisc/mm/fault.c */
  38
  39 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
  40 {
  41 }
  42
  43 #endif