1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _M68KNOMMU_PGTABLE_H 3*4882a593Smuzhiyun #define _M68KNOMMU_PGTABLE_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm-generic/pgtable-nopud.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/slab.h> 12*4882a593Smuzhiyun #include <asm/processor.h> 13*4882a593Smuzhiyun #include <asm/page.h> 14*4882a593Smuzhiyun #include <asm/io.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * Trivial page table functions. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun #define pgd_present(pgd) (1) 20*4882a593Smuzhiyun #define pgd_none(pgd) (0) 21*4882a593Smuzhiyun #define pgd_bad(pgd) (0) 22*4882a593Smuzhiyun #define pgd_clear(pgdp) 23*4882a593Smuzhiyun #define kern_addr_valid(addr) (1) 24*4882a593Smuzhiyun #define pmd_offset(a, b) ((void *)0) 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define PAGE_NONE __pgprot(0) 27*4882a593Smuzhiyun #define PAGE_SHARED __pgprot(0) 28*4882a593Smuzhiyun #define PAGE_COPY __pgprot(0) 29*4882a593Smuzhiyun #define PAGE_READONLY __pgprot(0) 30*4882a593Smuzhiyun #define PAGE_KERNEL __pgprot(0) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun extern void paging_init(void); 33*4882a593Smuzhiyun #define swapper_pg_dir ((pgd_t *) 0) 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #define __swp_type(x) (0) 36*4882a593Smuzhiyun #define __swp_offset(x) (0) 37*4882a593Smuzhiyun #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) 38*4882a593Smuzhiyun #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 39*4882a593Smuzhiyun #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* 42*4882a593Smuzhiyun * ZERO_PAGE is a global shared page that is always zero: used 43*4882a593Smuzhiyun * for zero-mapped memory areas etc.. 44*4882a593Smuzhiyun */ 45*4882a593Smuzhiyun extern void *empty_zero_page; 46*4882a593Smuzhiyun #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* 49*4882a593Smuzhiyun * All 32bit addresses are effectively valid for vmalloc... 50*4882a593Smuzhiyun * Sort of meaningless for non-VM targets. 51*4882a593Smuzhiyun */ 52*4882a593Smuzhiyun #define VMALLOC_START 0 53*4882a593Smuzhiyun #define VMALLOC_END 0xffffffff 54*4882a593Smuzhiyun #define KMAP_START 0 55*4882a593Smuzhiyun #define KMAP_END 0xffffffff 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun #endif /* _M68KNOMMU_PGTABLE_H */ 58