mmu_context.h

来自「Linux Kernel 2.6.9 for OMAP1710」· C头文件 代码 · 共 52 行

/*
 *  linux/include/asm-arm/mmu_context.h
 *
 *  Copyright (C) 1996 Russell King.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Changelog:
 *   27-06-1996	RMK	Created
 */
#ifndef __ASM_ARM_MMU_CONTEXT_H
#define __ASM_ARM_MMU_CONTEXT_H

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

/*
 * This is called when "tsk" is about to enter lazy TLB mode.
 *
 * mm:  describes the currently active mm context
 * tsk: task which is entering lazy tlb
 * cpu: cpu number which is entering lazy tlb
 *
 * tsk->mm will be NULL
 */
static inline void
enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}

/*
 * This is the actual mm switch as far as the scheduler
 * is concerned.  No registers are touched.
 */
static inline void
switch_mm(struct mm_struct *prev, struct mm_struct *next,
	  struct task_struct *tsk)
{
	cpu_switch_mm(next->pgd, next);
}

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

static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
{
	cpu_switch_mm(next->pgd, next);
}

#endif