arch/m68k/include/asm/pgtable_no.h

Source file repositories/reference/linux-study-clean/arch/m68k/include/asm/pgtable_no.h

File Facts

System
Linux kernel
Corpus path
arch/m68k/include/asm/pgtable_no.h
Extension
.h
Size
931 bytes
Lines
43
Domain
Architecture Layer
Bucket
arch/m68k
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 _M68KNOMMU_PGTABLE_H
#define _M68KNOMMU_PGTABLE_H

#include <asm-generic/pgtable-nopud.h>

/*
 * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
 */

#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/io.h>

/*
 * Trivial page table functions.
 */
#define pgd_present(pgd)	(1)
#define pgd_none(pgd)		(0)
#define pgd_bad(pgd)		(0)
#define pgd_clear(pgdp)
#define	pmd_offset(a, b)	((void *)0)

#define PAGE_NONE	__pgprot(0)
#define PAGE_SHARED	__pgprot(0)
#define PAGE_COPY	__pgprot(0)
#define PAGE_READONLY	__pgprot(0)
#define PAGE_KERNEL	__pgprot(0)

#define swapper_pg_dir ((pgd_t *) 0)

/*
 * All 32bit addresses are effectively valid for vmalloc...
 * Sort of meaningless for non-VM targets.
 */
#define	VMALLOC_START	0
#define	VMALLOC_END	0xffffffff
#define	KMAP_START	0
#define	KMAP_END	0xffffffff

#endif /* _M68KNOMMU_PGTABLE_H */

Annotation

Implementation Notes