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 32extern 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