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 "um_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 get_mmu_context(task) do ; while(0)
16 #define activate_context(tsk) do ; while(0)
17
18 #define deactivate_mm(tsk,mm) do { } while (0)
19
20 extern void force_flush_all(void);
21
activate_mm(struct mm_struct * old,struct mm_struct * new)22 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
23 {
24 /*
25 * This is called by fs/exec.c and sys_unshare()
26 * when the new ->mm is used for the first time.
27 */
28 __switch_mm(&new->context.id);
29 arch_dup_mmap(old, new);
30 }
31
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk)32 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
33 struct task_struct *tsk)
34 {
35 unsigned cpu = smp_processor_id();
36
37 if(prev != next){
38 cpumask_clear_cpu(cpu, mm_cpumask(prev));
39 cpumask_set_cpu(cpu, mm_cpumask(next));
40 if(next != &init_mm)
41 __switch_mm(&next->context.id);
42 }
43 }
44
enter_lazy_tlb(struct mm_struct * mm,struct task_struct * tsk)45 static inline void enter_lazy_tlb(struct mm_struct *mm,
46 struct task_struct *tsk)
47 {
48 }
49
50 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
51
52 extern void destroy_context(struct mm_struct *mm);
53
54 #endif
55