1/* SPDX-License-Identifier: GPL-2.0 */
 2/* 
 3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
 4 */
 5
 6#ifndef __UM_MMU_CONTEXT_H
 7#define __UM_MMU_CONTEXT_H
 8
 9#include <linux/sched.h>
10#include <linux/mm_types.h>
11#include <linux/mmap_lock.h>
12
13#include <asm/mm_hooks.h>
14#include <asm/mmu.h>
 
 
 
 
 
15
16extern void force_flush_all(void);
17
18#define activate_mm activate_mm
19static 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}
27
28static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
29			     struct task_struct *tsk)
30{
31	unsigned cpu = smp_processor_id();
32
33	if(prev != next){
34		cpumask_clear_cpu(cpu, mm_cpumask(prev));
35		cpumask_set_cpu(cpu, mm_cpumask(next));
36		if(next != &init_mm)
37			__switch_mm(&next->context.id);
38	}
39}
40
41#define init_new_context init_new_context
 
 
 
 
42extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
43
44#define destroy_context destroy_context
45extern void destroy_context(struct mm_struct *mm);
46
47#include <asm-generic/mmu_context.h>
48
49#endif

 
 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
12extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
13extern 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
20extern void force_flush_all(void);
21
 
22static 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
32static 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
45static inline void enter_lazy_tlb(struct mm_struct *mm, 
46				  struct task_struct *tsk)
47{
48}
49
50extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
51
 
52extern void destroy_context(struct mm_struct *mm);
 
 
53
54#endif