include/asm-blackfin/page.h

   1 #ifndef _BLACKFIN_PAGE_H
   2 #define _BLACKFIN_PAGE_H
   3
   4 /* PAGE_SHIFT determines the page size */
   5
   6 #define PAGE_SHIFT      12
   7 #ifdef __ASSEMBLY__
   8 #define PAGE_SIZE       (1 << PAGE_SHIFT)
   9 #else
  10 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  11 #endif
  12 #define PAGE_MASK       (~(PAGE_SIZE-1))
  13
  14 #include <asm/setup.h>
  15
  16 #ifndef __ASSEMBLY__
  17
  18 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  19 #define free_user_page(page, addr)      free_page(addr)
  20
  21 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  22 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  23
  24 #define clear_user_page(page, vaddr,pg) clear_page(page)
  25 #define copy_user_page(to, from, vaddr,pg)      copy_page(to, from)
  26
  27 /*
  28  * These are used to make use of C type-checking..
  29  */
  30 typedef struct {
  31         unsigned long pte;
  32 } pte_t;
  33 typedef struct {
  34         unsigned long pmd[16];
  35 } pmd_t;
  36 typedef struct {
  37         unsigned long pgd;
  38 } pgd_t;
  39 typedef struct {
  40         unsigned long pgprot;
  41 } pgprot_t;
  42 typedef struct page *pgtable_t;
  43
  44 #define pte_val(x)      ((x).pte)
  45 #define pmd_val(x)      ((&x)->pmd[0])
  46 #define pgd_val(x)      ((x).pgd)
  47 #define pgprot_val(x)   ((x).pgprot)
  48
  49 #define __pte(x)        ((pte_t) { (x) } )
  50 #define __pmd(x)        ((pmd_t) { (x) } )
  51 #define __pgd(x)        ((pgd_t) { (x) } )
  52 #define __pgprot(x)     ((pgprot_t) { (x) } )
  53
  54 /* to align the pointer to the (next) page boundary */
  55 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  56
  57 extern unsigned long memory_start;
  58 extern unsigned long memory_end;
  59
  60 #endif                          /* !__ASSEMBLY__ */
  61
  62 #include <asm/page_offset.h>
  63 #include <asm/io.h>
  64
  65 #define PAGE_OFFSET             (PAGE_OFFSET_RAW)
  66
  67 #ifndef __ASSEMBLY__
  68
  69 #define __pa(vaddr)             virt_to_phys((void *)(vaddr))
  70 #define __va(paddr)             phys_to_virt((unsigned long)(paddr))
  71
  72 #define MAP_NR(addr)            (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
  73
  74 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
  75 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
  76 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  77 #define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
  78 #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  79
  80 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
  81 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
  82 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  83
  84 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
  85                                 ((void *)(kaddr) < (void *)memory_end))
  86
  87 #include <asm-generic/page.h>
  88
  89 #endif                          /* __ASSEMBLY__ */
  90
  91 #endif                          /* _BLACKFIN_PAGE_H */