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 kern_addr_valid(addr)	(1)
24 #define	pmd_offset(a, b)	((void *)0)
25 
26 #define PAGE_NONE	__pgprot(0)
27 #define PAGE_SHARED	__pgprot(0)
28 #define PAGE_COPY	__pgprot(0)
29 #define PAGE_READONLY	__pgprot(0)
30 #define PAGE_KERNEL	__pgprot(0)
31 
32 extern void paging_init(void);
33 #define swapper_pg_dir ((pgd_t *) 0)
34 
35 #define __swp_type(x)		(0)
36 #define __swp_offset(x)		(0)
37 #define __swp_entry(typ,off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
38 #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
39 #define __swp_entry_to_pte(x)	((pte_t) { (x).val })
40 
41 /*
42  * ZERO_PAGE is a global shared page that is always zero: used
43  * for zero-mapped memory areas etc..
44  */
45 #define ZERO_PAGE(vaddr)	(virt_to_page(0))
46 
47 /*
48  * All 32bit addresses are effectively valid for vmalloc...
49  * Sort of meaningless for non-VM targets.
50  */
51 #define	VMALLOC_START	0
52 #define	VMALLOC_END	0xffffffff
53 #define	KMAP_START	0
54 #define	KMAP_END	0xffffffff
55 
56 #endif /* _M68KNOMMU_PGTABLE_H */
57