1 /*
2 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
3 * Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
4 * Copyright (C) 1999 Silicon Graphics, Inc.
5 *
6 * based on MIPS asm/mmu_context.h
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12
13 #ifndef _ASM_NIOS2_MMU_CONTEXT_H
14 #define _ASM_NIOS2_MMU_CONTEXT_H
15
16 #include <linux/mm_types.h>
17
18 #include <asm-generic/mm_hooks.h>
19
20 extern void mmu_context_init(void);
21 extern unsigned long get_pid_from_context(mm_context_t *ctx);
22
23 /*
24 * For the fast tlb miss handlers, we keep a pointer to the current pgd.
25 * processor.
26 */
27 extern pgd_t *pgd_current;
28
29 /*
30 * Initialize the context related info for a new mm_struct instance.
31 *
32 * Set all new contexts to 0, that way the generation will never match
33 * the currently running generation when this context is switched in.
34 */
35 #define init_new_context init_new_context
init_new_context(struct task_struct * tsk,struct mm_struct * mm)36 static inline int init_new_context(struct task_struct *tsk,
37 struct mm_struct *mm)
38 {
39 mm->context = 0;
40 return 0;
41 }
42
43 void switch_mm(struct mm_struct *prev, struct mm_struct *next,
44 struct task_struct *tsk);
45
46 /*
47 * After we have set current->mm to a new value, this activates
48 * the context for the new mm so we see the new mappings.
49 */
50 #define activate_mm activate_mm
51 void activate_mm(struct mm_struct *prev, struct mm_struct *next);
52
53 #include <asm-generic/mmu_context.h>
54
55 #endif /* _ASM_NIOS2_MMU_CONTEXT_H */
56