arch/nios2/include/asm/mmu_context.h

Source file repositories/reference/linux-study-clean/arch/nios2/include/asm/mmu_context.h

File Facts

System
Linux kernel
Corpus path
arch/nios2/include/asm/mmu_context.h
Extension
.h
Size
1513 bytes
Lines
56
Domain
Architecture Layer
Bucket
arch/nios2
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_NIOS2_MMU_CONTEXT_H
#define _ASM_NIOS2_MMU_CONTEXT_H

#include <linux/mm_types.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;

/*
 * 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.
 */
#define init_new_context init_new_context
static inline int init_new_context(struct task_struct *tsk,
					struct mm_struct *mm)
{
	mm->context = 0;
	return 0;
}

void switch_mm(struct mm_struct *prev, struct mm_struct *next,
		struct task_struct *tsk);

/*
 * After we have set current->mm to a new value, this activates
 * the context for the new mm so we see the new mappings.
 */
#define activate_mm activate_mm
void activate_mm(struct mm_struct *prev, struct mm_struct *next);

#include <asm-generic/mmu_context.h>

#endif /* _ASM_NIOS2_MMU_CONTEXT_H */

Annotation

Implementation Notes