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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _M68KNOMMU_PGTABLE_H
3#define _M68KNOMMU_PGTABLE_H
4
5#include <asm-generic/pgtable-nopud.h>
6
7/*
8 * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
9 */
10
11#include <linux/slab.h>
12#include <asm/processor.h>
13#include <asm/page.h>
14#include <asm/io.h>
15
16/*
17 * Trivial page table functions.
18 */
19#define pgd_present(pgd) (1)
20#define pgd_none(pgd) (0)
21#define pgd_bad(pgd) (0)
22#define pgd_clear(pgdp)
23#define pmd_offset(a, b) ((void *)0)
24
25#define PAGE_NONE __pgprot(0)
26#define PAGE_SHARED __pgprot(0)
27#define PAGE_COPY __pgprot(0)
28#define PAGE_READONLY __pgprot(0)
29#define PAGE_KERNEL __pgprot(0)
30
31#define swapper_pg_dir ((pgd_t *) 0)
32
33/*
34 * ZERO_PAGE is a global shared page that is always zero: used
35 * for zero-mapped memory areas etc..
36 */
37extern void *empty_zero_page;
38#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
39
40/*
41 * All 32bit addresses are effectively valid for vmalloc...
42 * Sort of meaningless for non-VM targets.
43 */
44#define VMALLOC_START 0
45#define VMALLOC_END 0xffffffff
46#define KMAP_START 0
47#define KMAP_END 0xffffffff
48
49#endif /* _M68KNOMMU_PGTABLE_H */