arch/alpha/include/asm/page.h

   1 #ifndef _ALPHA_PAGE_H
   2 #define _ALPHA_PAGE_H
   3
   4 #include <linux/const.h>
   5 #include <asm/pal.h>
   6
   7 /* PAGE_SHIFT determines the page size */
   8 #define PAGE_SHIFT      13
   9 #define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
  10 #define PAGE_MASK       (~(PAGE_SIZE-1))
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #define STRICT_MM_TYPECHECKS
  15
  16 extern void clear_page(void *page);
  17 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  18
  19 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
  20         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vmaddr)
  21 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  22
  23 extern void copy_page(void * _to, void * _from);
  24 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  25
  26 #ifdef STRICT_MM_TYPECHECKS
  27 /*
  28  * These are used to make use of C type-checking..
  29  */
  30 typedef struct { unsigned long pte; } pte_t;
  31 typedef struct { unsigned long pmd; } pmd_t;
  32 typedef struct { unsigned long pgd; } pgd_t;
  33 typedef struct { unsigned long pgprot; } pgprot_t;
  34
  35 #define pte_val(x)      ((x).pte)
  36 #define pmd_val(x)      ((x).pmd)
  37 #define pgd_val(x)      ((x).pgd)
  38 #define pgprot_val(x)   ((x).pgprot)
  39
  40 #define __pte(x)        ((pte_t) { (x) } )
  41 #define __pmd(x)        ((pmd_t) { (x) } )
  42 #define __pgd(x)        ((pgd_t) { (x) } )
  43 #define __pgprot(x)     ((pgprot_t) { (x) } )
  44
  45 #else
  46 /*
  47  * .. while these make it easier on the compiler
  48  */
  49 typedef unsigned long pte_t;
  50 typedef unsigned long pmd_t;
  51 typedef unsigned long pgd_t;
  52 typedef unsigned long pgprot_t;
  53
  54 #define pte_val(x)      (x)
  55 #define pmd_val(x)      (x)
  56 #define pgd_val(x)      (x)
  57 #define pgprot_val(x)   (x)
  58
  59 #define __pte(x)        (x)
  60 #define __pgd(x)        (x)
  61 #define __pgprot(x)     (x)
  62
  63 #endif /* STRICT_MM_TYPECHECKS */
  64
  65 typedef struct page *pgtable_t;
  66
  67 #ifdef USE_48_BIT_KSEG
  68 #define PAGE_OFFSET             0xffff800000000000UL
  69 #else
  70 #define PAGE_OFFSET             0xfffffc0000000000UL
  71 #endif
  72
  73 #else
  74
  75 #ifdef USE_48_BIT_KSEG
  76 #define PAGE_OFFSET             0xffff800000000000
  77 #else
  78 #define PAGE_OFFSET             0xfffffc0000000000
  79 #endif
  80
  81 #endif /* !__ASSEMBLY__ */
  82
  83 #define __pa(x)                 ((unsigned long) (x) - PAGE_OFFSET)
  84 #define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
  85 #ifndef CONFIG_DISCONTIGMEM
  86 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  87
  88 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  89 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
  90 #endif /* CONFIG_DISCONTIGMEM */
  91
  92 #define VM_DATA_DEFAULT_FLAGS           (VM_READ | VM_WRITE | VM_EXEC | \
  93                                          VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  94
  95 #include <asm-generic/memory_model.h>
  96 #include <asm-generic/getorder.h>
  97
  98 #endif /* _ALPHA_PAGE_H */