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 extern void paging_init(void); 32 #define swapper_pg_dir ((pgd_t *) 0) 33 34 /* 35 * ZERO_PAGE is a global shared page that is always zero: used 36 * for zero-mapped memory areas etc.. 37 */ 38 extern void *empty_zero_page; 39 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 40 41 /* 42 * All 32bit addresses are effectively valid for vmalloc... 43 * Sort of meaningless for non-VM targets. 44 */ 45 #define VMALLOC_START 0 46 #define VMALLOC_END 0xffffffff 47 #define KMAP_START 0 48 #define KMAP_END 0xffffffff 49 50 #endif /* _M68KNOMMU_PGTABLE_H */ 51