1 #ifndef _M68KNOMMU_PGTABLE_H
2 #define _M68KNOMMU_PGTABLE_H
4 #include <asm-generic/4level-fixup.h>
7 * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
10 #include <linux/config.h>
11 #include <linux/slab.h>
12 #include <asm/processor.h>
17 * Trivial page table functions.
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)
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)
32 extern void paging_init(void);
33 #define swapper_pg_dir ((pgd_t *) 0)
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 })
41 static inline int pte_file(pte_t pte) { return 0; }
44 * ZERO_PAGE is a global shared page that is always zero: used
45 * for zero-mapped memory areas etc..
47 #define ZERO_PAGE(vaddr) (virt_to_page(0))
50 * These would be in other places but having them here reduces the diffs.
52 extern unsigned int kobjsize(const void *objp);
53 extern int is_in_rom(unsigned long);
56 * No page table caches to initialise.
58 #define pgtable_cache_init() do { } while (0)
59 #define io_remap_page_range(vma, vaddr, paddr, size, prot) \
60 remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
62 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
63 remap_pfn_range(vma, vaddr, pfn, size, prot)
65 #define MK_IOSPACE_PFN(space, pfn) (pfn)
66 #define GET_IOSPACE(pfn) 0
67 #define GET_PFN(pfn) (pfn)
70 * All 32bit addresses are effectively valid for vmalloc...
71 * Sort of meaningless for non-VM targets.
73 #define VMALLOC_START 0
74 #define VMALLOC_END 0xffffffff
76 #endif /* _M68KNOMMU_PGTABLE_H */