arch/sparc/include/asm/page_64.h

   1 #ifndef _SPARC64_PAGE_H
   2 #define _SPARC64_PAGE_H
   3
   4 #include <linux/const.h>
   5
   6 #define PAGE_SHIFT   13
   7
   8 #define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
   9 #define PAGE_MASK    (~(PAGE_SIZE-1))
  10
  11 /* Flushing for D-cache alias handling is only needed if
  12  * the page size is smaller than 16K.
  13  */
  14 #if PAGE_SHIFT < 14
  15 #define DCACHE_ALIASING_POSSIBLE
  16 #endif
  17
  18 #define HPAGE_SHIFT             22
  19
  20 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
  21 #define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
  22 #define HPAGE_MASK              (~(HPAGE_SIZE - 1UL))
  23 #define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
  24 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
  25 #endif
  26
  27 #ifndef __ASSEMBLY__
  28
  29 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
  30 struct pt_regs;
  31 extern void hugetlb_setup(struct pt_regs *regs);
  32 #endif
  33
  34 #define WANT_PAGE_VIRTUAL
  35
  36 extern void _clear_page(void *page);
  37 #define clear_page(X)   _clear_page((void *)(X))
  38 struct page;
  39 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
  40 #define copy_page(X,Y)  memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
  41 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
  42
  43 /* Unlike sparc32, sparc64's parameter passing API is more
  44  * sane in that structures which as small enough are passed
  45  * in registers instead of on the stack.  Thus, setting
  46  * STRICT_MM_TYPECHECKS does not generate worse code so
  47  * let's enable it to get the type checking.
  48  */
  49
  50 #define STRICT_MM_TYPECHECKS
  51
  52 #ifdef STRICT_MM_TYPECHECKS
  53 /* These are used to make use of C type-checking.. */
  54 typedef struct { unsigned long pte; } pte_t;
  55 typedef struct { unsigned long iopte; } iopte_t;
  56 typedef struct { unsigned int pmd; } pmd_t;
  57 typedef struct { unsigned int pgd; } pgd_t;
  58 typedef struct { unsigned long pgprot; } pgprot_t;
  59
  60 #define pte_val(x)      ((x).pte)
  61 #define iopte_val(x)    ((x).iopte)
  62 #define pmd_val(x)      ((x).pmd)
  63 #define pgd_val(x)      ((x).pgd)
  64 #define pgprot_val(x)   ((x).pgprot)
  65
  66 #define __pte(x)        ((pte_t) { (x) } )
  67 #define __iopte(x)      ((iopte_t) { (x) } )
  68 #define __pmd(x)        ((pmd_t) { (x) } )
  69 #define __pgd(x)        ((pgd_t) { (x) } )
  70 #define __pgprot(x)     ((pgprot_t) { (x) } )
  71
  72 #else
  73 /* .. while these make it easier on the compiler */
  74 typedef unsigned long pte_t;
  75 typedef unsigned long iopte_t;
  76 typedef unsigned int pmd_t;
  77 typedef unsigned int pgd_t;
  78 typedef unsigned long pgprot_t;
  79
  80 #define pte_val(x)      (x)
  81 #define iopte_val(x)    (x)
  82 #define pmd_val(x)      (x)
  83 #define pgd_val(x)      (x)
  84 #define pgprot_val(x)   (x)
  85
  86 #define __pte(x)        (x)
  87 #define __iopte(x)      (x)
  88 #define __pmd(x)        (x)
  89 #define __pgd(x)        (x)
  90 #define __pgprot(x)     (x)
  91
  92 #endif /* (STRICT_MM_TYPECHECKS) */
  93
  94 typedef pte_t *pgtable_t;
  95
  96 #define TASK_UNMAPPED_BASE      (test_thread_flag(TIF_32BIT) ? \
  97                                  (_AC(0x0000000070000000,UL)) : \
  98                                  (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
  99
 100 #include <asm-generic/memory_model.h>
 101
 102 #endif /* !(__ASSEMBLY__) */
 103
 104 /* We used to stick this into a hard-coded global register (%g4)
 105  * but that does not make sense anymore.
 106  */
 107 #define PAGE_OFFSET             _AC(0xFFFFF80000000000,UL)
 108
 109 #ifndef __ASSEMBLY__
 110
 111 #define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
 112 #define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
 113
 114 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
 115
 116 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
 117
 118 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 119
 120 #define virt_to_phys __pa
 121 #define phys_to_virt __va
 122
 123 #endif /* !(__ASSEMBLY__) */
 124
 125 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
 126                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 127
 128 #include <asm-generic/getorder.h>
 129
 130 #endif /* _SPARC64_PAGE_H */