1. 根目录:
2. arch
3. cris
4. include
5. asm
6. mmu_context.h

#ifndef __CRIS_MMU_CONTEXT_H
#define __CRIS_MMU_CONTEXT_H

#include <asm-generic/mm_hooks.h>

extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
extern void get_mmu_context(struct mm_struct *mm);
extern void destroy_context(struct mm_struct *mm);
extern void switch_mm(struct mm_struct *prev, struct mm_struct *next,
		      struct task_struct *tsk);

#define deactivate_mm(tsk,mm)	do { } while (0)

static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
{
	unsigned long flags;

	local_irq_save(flags);
	switch_mm(prev, next, NULL);
	local_irq_restore(flags);
}

/* current active pgd - this is similar to other processors pgd 
 * registers like cr3 on the i386
 */

/* defined in arch/cris/mm/fault.c */
DECLARE_PER_CPU(pgd_t *, current_pgd);

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}

#endif