include/asm-m68knommu/pgtable.h

   1 #ifndef _M68KNOMMU_PGTABLE_H
   2 #define _M68KNOMMU_PGTABLE_H
   3
   4 /*
   5  * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
   6  */
   7
   8 #include <linux/config.h>
   9 #include <linux/slab.h>
  10 #include <asm/processor.h>
  11 #include <asm/page.h>
  12 #include <asm/io.h>
  13
  14 typedef pte_t *pte_addr_t;
  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 static inline int pte_file(pte_t pte) { return 0; }
  42
  43 /*
  44  * ZERO_PAGE is a global shared page that is always zero: used
  45  * for zero-mapped memory areas etc..
  46  */
  47 #define ZERO_PAGE(vaddr)        (virt_to_page(0))
  48
  49 /*
  50  * These would be in other places but having them here reduces the diffs.
  51  */
  52 extern unsigned int kobjsize(const void *objp);
  53 extern int is_in_rom(unsigned long);
  54
  55 /*
  56  * No page table caches to initialise.
  57  */
  58 #define pgtable_cache_init()    do { } while (0)
  59 #define io_remap_page_range     remap_page_range
  60
  61 /*
  62  * All 32bit addresses are effectively valid for vmalloc...
  63  * Sort of meaningless for non-VM targets.
  64  */
  65 #define VMALLOC_START   0
  66 #define VMALLOC_END     0xffffffff
  67
  68 #endif /* _M68KNOMMU_PGTABLE_H */