[mirror_ubuntu-artful-kernel.git] / arch / nios2 / include / asm / mmu_context.h

/*
 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
 * Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
 * Copyright (C) 1999 Silicon Graphics, Inc.
 *
 * based on MIPS asm/mmu_context.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_NIOS2_MMU_CONTEXT_H
#define _ASM_NIOS2_MMU_CONTEXT_H

#include <linux/mm_types.h>

#include <asm-generic/mm_hooks.h>

extern void mmu_context_init(void);
extern unsigned long get_pid_from_context(mm_context_t *ctx);

/*
 * For the fast tlb miss handlers, we keep a pointer to the current pgd.
 * processor.
 */
extern pgd_t *pgd_current;

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

/*
 * Initialize the context related info for a new mm_struct instance.
 *
 * Set all new contexts to 0, that way the generation will never match
 * the currently running generation when this context is switched in.
 */
static inline int init_new_context(struct task_struct *tsk,
					struct mm_struct *mm)
{
	mm->context = 0;
	return 0;
}

/*
 * Destroy context related info for an mm_struct that is about
 * to be put to rest.
 */
static inline void destroy_context(struct mm_struct *mm)
{
}

void switch_mm(struct mm_struct *prev, struct mm_struct *next,
		struct task_struct *tsk);

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

/*
 * After we have set current->mm to a new value, this activates
 * the context for the new mm so we see the new mappings.
 */
void activate_mm(struct mm_struct *prev, struct mm_struct *next);

#endif /* _ASM_NIOS2_MMU_CONTEXT_H */
Commit	Line	Data
71995e4d LFT	1	/*
	2	* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
	3	* Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
	4	* Copyright (C) 1999 Silicon Graphics, Inc.
	5	*
	6	* based on MIPS asm/mmu_context.h
	7	*
	8	* This file is subject to the terms and conditions of the GNU General Public
	9	* License. See the file "COPYING" in the main directory of this archive
	10	* for more details.
	11	*/
	12
	13	#ifndef _ASM_NIOS2_MMU_CONTEXT_H
	14	#define _ASM_NIOS2_MMU_CONTEXT_H
	15
589ee628 IM	16	#include <linux/mm_types.h>
589ee628 IM	17
71995e4d LFT	18	#include <asm-generic/mm_hooks.h>
	19
	20	extern void mmu_context_init(void);
	21	extern unsigned long get_pid_from_context(mm_context_t *ctx);
	22
	23	/*
	24	* For the fast tlb miss handlers, we keep a pointer to the current pgd.
	25	* processor.
	26	*/
	27	extern pgd_t *pgd_current;
	28
	29	static inline void enter_lazy_tlb(struct mm_struct mm, struct task_struct tsk)
	30	{
	31	}
	32
	33	/*
	34	* Initialize the context related info for a new mm_struct instance.
	35	*
	36	* Set all new contexts to 0, that way the generation will never match
	37	* the currently running generation when this context is switched in.
	38	*/
	39	static inline int init_new_context(struct task_struct *tsk,
	40	struct mm_struct *mm)
	41	{
	42	mm->context = 0;
	43	return 0;
	44	}
	45
	46	/*
	47	* Destroy context related info for an mm_struct that is about
	48	* to be put to rest.
	49	*/
	50	static inline void destroy_context(struct mm_struct *mm)
	51	{
	52	}
	53
	54	void switch_mm(struct mm_struct prev, struct mm_struct next,
	55	struct task_struct *tsk);
	56
	57	static inline void deactivate_mm(struct task_struct *tsk,
	58	struct mm_struct *mm)
	59	{
	60	}
	61
	62	/*
	63	* After we have set current->mm to a new value, this activates
	64	* the context for the new mm so we see the new mappings.
	65	*/
	66	void activate_mm(struct mm_struct prev, struct mm_struct next);
	67
	68	#endif /* _ASM_NIOS2_MMU_CONTEXT_H */