include/asm-m68knommu/pgtable.h

   1 #ifndef _M68KNOMMU_PGTABLE_H
   2 #define _M68KNOMMU_PGTABLE_H
   3
   4 #include <asm-generic/4level-fixup.h>
   5
   6 /*
   7  * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
   8  */
   9
  10 #include <linux/slab.h>
  11 #include <asm/processor.h>
  12 #include <asm/page.h>
  13 #include <asm/io.h>
  14
  15 /*
  16  * Trivial page table functions.
  17  */
  18 #define pgd_present(pgd)        (1)
  19 #define pgd_none(pgd)           (0)
  20 #define pgd_bad(pgd)            (0)
  21 #define pgd_clear(pgdp)
  22 #define kern_addr_valid(addr)   (1)
  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 #define __swp_type(x)           (0)
  35 #define __swp_offset(x)         (0)
  36 #define __swp_entry(typ,off)    ((swp_entry_t) { ((typ) | ((off) << 7)) })
  37 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
  38 #define __swp_entry_to_pte(x)   ((pte_t) { (x).val })
  39
  40 static inline int pte_file(pte_t pte) { return 0; }
  41
  42 /*
  43  * ZERO_PAGE is a global shared page that is always zero: used
  44  * for zero-mapped memory areas etc..
  45  */
  46 #define ZERO_PAGE(vaddr)        (virt_to_page(0))
  47
  48 /*
  49  * These would be in other places but having them here reduces the diffs.
  50  */
  51 extern unsigned int kobjsize(const void *objp);
  52 extern int is_in_rom(unsigned long);
  53
  54 /*
  55  * No page table caches to initialise.
  56  */
  57 #define pgtable_cache_init()    do { } while (0)
  58
  59 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot)         \
  60                 remap_pfn_range(vma, vaddr, pfn, size, prot)
  61
  62 #define MK_IOSPACE_PFN(space, pfn)      (pfn)
  63 #define GET_IOSPACE(pfn)                0
  64 #define GET_PFN(pfn)                    (pfn)
  65
  66 /*
  67  * All 32bit addresses are effectively valid for vmalloc...
  68  * Sort of meaningless for non-VM targets.
  69  */
  70 #define VMALLOC_START   0
  71 #define VMALLOC_END     0xffffffff
  72
  73 #endif /* _M68KNOMMU_PGTABLE_H */