1 /*
2 * linux/include/asm-arm/mmu_context.h
3 *
4 * Copyright (C) 1996 Russell King.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Changelog:
11 * 27-06-1996 RMK Created
12 */
13 #ifndef __ASM_ARM_MMU_CONTEXT_H
14 #define __ASM_ARM_MMU_CONTEXT_H
15
16 #include <asm/pgtable.h>
17 #include <asm/memory.h>
18 #include <asm/proc-fns.h>
19
20 #define destroy_context(mm) do { } while(0)
21 #define init_new_context(tsk,mm) 0
22
23 /*
24 * This is called when "tsk" is about to enter lazy TLB mode.
25 *
26 * mm: describes the currently active mm context
27 * tsk: task which is entering lazy tlb
28 * cpu: cpu number which is entering lazy tlb
29 *
30 * tsk->mm will be NULL
31 */
32 static inline void
enter_lazy_tlb(struct mm_struct * mm,struct task_struct * tsk,unsigned cpu)33 enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk, unsigned cpu)
34 {
35 }
36
37 /*
38 * This is the actual mm switch as far as the scheduler
39 * is concerned. No registers are touched.
40 */
41 static inline void
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk,unsigned int cpu)42 switch_mm(struct mm_struct *prev, struct mm_struct *next,
43 struct task_struct *tsk, unsigned int cpu)
44 {
45 if (prev != next)
46 cpu_switch_mm(next->pgd, tsk);
47 }
48
49 #define activate_mm(prev, next) \
50 switch_mm((prev),(next),NULL,smp_processor_id())
51
52 #endif
53