1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _M68KNOMMU_PGTABLE_H
3 #define _M68KNOMMU_PGTABLE_H
5 #include <asm-generic/pgtable-nopud.h>
8 * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
11 #include <linux/slab.h>
12 #include <asm/processor.h>
17 * Trivial page table functions.
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)
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)
31 #define swapper_pg_dir ((pgd_t *) 0)
34 * ZERO_PAGE is a global shared page that is always zero: used
35 * for zero-mapped memory areas etc..
37 extern void *empty_zero_page;
38 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
41 * All 32bit addresses are effectively valid for vmalloc...
42 * Sort of meaningless for non-VM targets.
44 #define VMALLOC_START 0
45 #define VMALLOC_END 0xffffffff
47 #define KMAP_END 0xffffffff
49 #endif /* _M68KNOMMU_PGTABLE_H */