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 */ 50