include/asm-m68knommu/page.h

   1 #ifndef _M68KNOMMU_PAGE_H
   2 #define _M68KNOMMU_PAGE_H
   3
   4 #ifdef __KERNEL__
   5
   6 /* PAGE_SHIFT determines the page size */
   7
   8 #define PAGE_SHIFT      (12)
   9 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  10 #define PAGE_MASK       (~(PAGE_SIZE-1))
  11
  12 #include <asm/setup.h>
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  17 #define free_user_page(page, addr)      free_page(addr)
  18
  19 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  20 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  21
  22 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  23 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  24
  25 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
  26 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  27
  28 /*
  29  * These are used to make use of C type-checking..
  30  */
  31 typedef struct { unsigned long pte; } pte_t;
  32 typedef struct { unsigned long pmd[16]; } pmd_t;
  33 typedef struct { unsigned long pgd; } pgd_t;
  34 typedef struct { unsigned long pgprot; } pgprot_t;
  35
  36 #define pte_val(x)      ((x).pte)
  37 #define pmd_val(x)      ((&x)->pmd[0])
  38 #define pgd_val(x)      ((x).pgd)
  39 #define pgprot_val(x)   ((x).pgprot)
  40
  41 #define __pte(x)        ((pte_t) { (x) } )
  42 #define __pmd(x)        ((pmd_t) { (x) } )
  43 #define __pgd(x)        ((pgd_t) { (x) } )
  44 #define __pgprot(x)     ((pgprot_t) { (x) } )
  45
  46 /* to align the pointer to the (next) page boundary */
  47 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  48
  49 extern unsigned long memory_start;
  50 extern unsigned long memory_end;
  51
  52 #endif /* !__ASSEMBLY__ */
  53
  54 #include <asm/page_offset.h>
  55
  56 #define PAGE_OFFSET             (PAGE_OFFSET_RAW)
  57
  58 #ifndef __ASSEMBLY__
  59
  60 #define __pa(vaddr)             virt_to_phys((void *)(vaddr))
  61 #define __va(paddr)             phys_to_virt((unsigned long)(paddr))
  62
  63 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
  64 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
  65
  66 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  67 #define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
  68
  69 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
  70 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
  71 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  72
  73 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
  74                                 ((void *)(kaddr) < (void *)memory_end))
  75
  76 #endif /* __ASSEMBLY__ */
  77
  78 #include <asm-generic/page.h>
  79
  80 #endif /* __KERNEL__ */
  81
  82 #endif /* _M68KNOMMU_PAGE_H */