1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _M68KNOMMU_PGTABLE_H 3 #define _M68KNOMMU_PGTABLE_H 4 5 #include <asm-generic/4level-fixup.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 * No page table caches to initialise. 49 */ 50 #define pgtable_cache_init() do { } while (0) 51 52 /* 53 * All 32bit addresses are effectively valid for vmalloc... 54 * Sort of meaningless for non-VM targets. 55 */ 56 #define VMALLOC_START 0 57 #define VMALLOC_END 0xffffffff 58 #define KMAP_START 0 59 #define KMAP_END 0xffffffff 60 61 #include <asm-generic/pgtable.h> 62 63 #define check_pgt_cache() do { } while (0) 64 65 #endif /* _M68KNOMMU_PGTABLE_H */ 66