1 /*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
8
9 #include <linux/sched.h>
10 #include <asm/mmu.h>
11
12 extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
13 extern void arch_exit_mmap(struct mm_struct *mm);
14
15 #define deactivate_mm(tsk,mm) do { } while (0)
16
17 extern void force_flush_all(void);
18
activate_mm(struct mm_struct * old,struct mm_struct * new)19 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
20 {
21 /*
22 * This is called by fs/exec.c and sys_unshare()
23 * when the new ->mm is used for the first time.
24 */
25 __switch_mm(&new->context.id);
26 arch_dup_mmap(old, new);
27 }
28
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk)29 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
30 struct task_struct *tsk)
31 {
32 unsigned cpu = smp_processor_id();
33
34 if(prev != next){
35 cpumask_clear_cpu(cpu, mm_cpumask(prev));
36 cpumask_set_cpu(cpu, mm_cpumask(next));
37 if(next != &init_mm)
38 __switch_mm(&next->context.id);
39 }
40 }
41
enter_lazy_tlb(struct mm_struct * mm,struct task_struct * tsk)42 static inline void enter_lazy_tlb(struct mm_struct *mm,
43 struct task_struct *tsk)
44 {
45 }
46
47 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
48
49 extern void destroy_context(struct mm_struct *mm);
50
51 #endif
52