2005-04-16 16:20:36 -06:00
|
|
|
/* mmu_context.h: MMU context management routines
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
|
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
|
|
|
*
|
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
|
* as published by the Free Software Foundation; either version
|
|
|
|
|
* 2 of the License, or (at your option) any later version.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef _ASM_MMU_CONTEXT_H
|
|
|
|
|
#define _ASM_MMU_CONTEXT_H
|
|
|
|
|
|
|
|
|
|
#include <asm/setup.h>
|
|
|
|
|
#include <asm/page.h>
|
|
|
|
|
#include <asm/pgalloc.h>
|
2007-05-02 11:27:14 -06:00
|
|
|
#include <asm-generic/mm_hooks.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
|
extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
|
|
|
|
|
extern void change_mm_context(mm_context_t *old, mm_context_t *ctx, pgd_t *_pgd);
|
|
|
|
|
extern void destroy_context(struct mm_struct *mm);
|
|
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
#define init_new_context(tsk, mm) ({ 0; })
|
|
|
|
|
#define change_mm_context(old, ctx, _pml4) do {} while(0)
|
|
|
|
|
#define destroy_context(mm) do {} while(0)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#define switch_mm(prev, next, tsk) \
|
|
|
|
|
do { \
|
|
|
|
|
if (prev != next) \
|
|
|
|
|
change_mm_context(&prev->context, &next->context, next->pgd); \
|
|
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
#define activate_mm(prev, next) \
|
|
|
|
|
do { \
|
|
|
|
|
change_mm_context(&prev->context, &next->context, next->pgd); \
|
|
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
#define deactivate_mm(tsk, mm) \
|
|
|
|
|
do { \
|
|
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
#endif
|
