aboutsummaryrefslogtreecommitdiff
path: root/include/asm-um/mmu_context.h
blob: 54f42e8b0105b7112c9d42a47d41f5fc4fc68312 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
/* 
 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#ifndef __UM_MMU_CONTEXT_H
#define __UM_MMU_CONTEXT_H

#include "linux/sched.h"
#include "um_mmu.h"

extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
extern void arch_exit_mmap(struct mm_struct *mm);

#define get_mmu_context(task) do ; while(0)
#define activate_context(tsk) do ; while(0)

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

extern void force_flush_all(void);

static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
{
	/*
	 * This is called by fs/exec.c and sys_unshare()
	 * when the new ->mm is used for the first time.
	 */
	__switch_mm(&new->context.id);
	arch_dup_mmap(old, new);
}

static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
			     struct task_struct *tsk)
{
	unsigned cpu = smp_processor_id();

	if(prev != next){
		cpu_clear(cpu, prev->cpu_vm_mask);
		cpu_set(cpu, next->cpu_vm_mask);
		if(next != &init_mm)
			__switch_mm(&next->context.id);
	}
}

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

extern int init_new_context(struct task_struct *task, struct mm_struct *mm);

extern void destroy_context(struct mm_struct *mm);

#endif