71995e4d00
This patch adds support for thread creation and context switching. Signed-off-by: Ley Foon Tan <lftan@altera.com>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
|
|
* Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
|
|
* Copyright (C) 1999 Silicon Graphics, Inc.
|
|
*
|
|
* based on MIPS asm/mmu_context.h
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#ifndef _ASM_NIOS2_MMU_CONTEXT_H
|
|
#define _ASM_NIOS2_MMU_CONTEXT_H
|
|
|
|
#include <asm-generic/mm_hooks.h>
|
|
|
|
extern void mmu_context_init(void);
|
|
extern unsigned long get_pid_from_context(mm_context_t *ctx);
|
|
|
|
/*
|
|
* For the fast tlb miss handlers, we keep a pointer to the current pgd.
|
|
* processor.
|
|
*/
|
|
extern pgd_t *pgd_current;
|
|
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Initialize the context related info for a new mm_struct instance.
|
|
*
|
|
* Set all new contexts to 0, that way the generation will never match
|
|
* the currently running generation when this context is switched in.
|
|
*/
|
|
static inline int init_new_context(struct task_struct *tsk,
|
|
struct mm_struct *mm)
|
|
{
|
|
mm->context = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Destroy context related info for an mm_struct that is about
|
|
* to be put to rest.
|
|
*/
|
|
static inline void destroy_context(struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
void switch_mm(struct mm_struct *prev, struct mm_struct *next,
|
|
struct task_struct *tsk);
|
|
|
|
static inline void deactivate_mm(struct task_struct *tsk,
|
|
struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* After we have set current->mm to a new value, this activates
|
|
* the context for the new mm so we see the new mappings.
|
|
*/
|
|
void activate_mm(struct mm_struct *prev, struct mm_struct *next);
|
|
|
|
#endif /* _ASM_NIOS2_MMU_CONTEXT_H */
|