1#ifndef _M68KNOMMU_PGTABLE_H
2#define _M68KNOMMU_PGTABLE_H
3
4#include <asm-generic/4level-fixup.h>
5
6/*
7 * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
8 */
9
10#include <linux/slab.h>
11#include <asm/processor.h>
12#include <asm/page.h>
13#include <asm/io.h>
14
15/*
16 * Trivial page table functions.
17 */
18#define pgd_present(pgd)	(1)
19#define pgd_none(pgd)		(0)
20#define pgd_bad(pgd)		(0)
21#define pgd_clear(pgdp)
22#define kern_addr_valid(addr)	(1)
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
31extern void paging_init(void);
32#define swapper_pg_dir ((pgd_t *) 0)
33
34#define __swp_type(x)		(0)
35#define __swp_offset(x)		(0)
36#define __swp_entry(typ,off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
37#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
38#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
39
40static inline int pte_file(pte_t pte) { return 0; }
41
42/*
43 * ZERO_PAGE is a global shared page that is always zero: used
44 * for zero-mapped memory areas etc..
45 */
46#define ZERO_PAGE(vaddr)	(virt_to_page(0))
47
48/*
49 * These would be in other places but having them here reduces the diffs.
50 */
51extern unsigned int kobjsize(const void *objp);
52extern int is_in_rom(unsigned long);
53
54/*
55 * No page table caches to initialise.
56 */
57#define pgtable_cache_init()	do { } while (0)
58
59#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)		\
60		remap_pfn_range(vma, vaddr, pfn, size, prot)
61
62/*
63 * All 32bit addresses are effectively valid for vmalloc...
64 * Sort of meaningless for non-VM targets.
65 */
66#define	VMALLOC_START	0
67#define	VMALLOC_END	0xffffffff
68
69#endif /* _M68KNOMMU_PGTABLE_H */
70