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 #ifdef __KERNEL__
  15
  16 #include <asm/setup.h>
  17
  18 #ifndef __ASSEMBLY__
  19
  20 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  21 #define free_user_page(page, addr)      free_page(addr)
  22
  23 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  24 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  25
  26 #define clear_user_page(page, vaddr,pg) clear_page(page)
  27 #define copy_user_page(to, from, vaddr,pg)      copy_page(to, from)
  28
  29 /*
  30  * These are used to make use of C type-checking..
  31  */
  32 typedef struct {
  33         unsigned long pte;
  34 } pte_t;
  35 typedef struct {
  36         unsigned long pmd[16];
  37 } pmd_t;
  38 typedef struct {
  39         unsigned long pgd;
  40 } pgd_t;
  41 typedef struct {
  42         unsigned long pgprot;
  43 } pgprot_t;
  44
  45 #define pte_val(x)      ((x).pte)
  46 #define pmd_val(x)      ((&x)->pmd[0])
  47 #define pgd_val(x)      ((x).pgd)
  48 #define pgprot_val(x)   ((x).pgprot)
  49
  50 #define __pte(x)        ((pte_t) { (x) } )
  51 #define __pmd(x)        ((pmd_t) { (x) } )
  52 #define __pgd(x)        ((pgd_t) { (x) } )
  53 #define __pgprot(x)     ((pgprot_t) { (x) } )
  54
  55 /* to align the pointer to the (next) page boundary */
  56 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  57
  58 extern unsigned long memory_start;
  59 extern unsigned long memory_end;
  60
  61 #endif                          /* !__ASSEMBLY__ */
  62
  63 #include <asm/page_offset.h>
  64 #include <asm/io.h>
  65
  66 #define PAGE_OFFSET             (PAGE_OFFSET_RAW)
  67
  68 #ifndef __ASSEMBLY__
  69
  70 #define __pa(vaddr)             virt_to_phys((void *)(vaddr))
  71 #define __va(paddr)             phys_to_virt((unsigned long)(paddr))
  72
  73 #define MAP_NR(addr)            (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
  74
  75 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
  76 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
  77 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  78 #define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
  79 #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  80
  81 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
  82 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
  83 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  84
  85 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
  86                                 ((void *)(kaddr) < (void *)memory_end))
  87
  88 #include <asm-generic/page.h>
  89
  90 #endif                          /* __ASSEMBLY__ */
  91 #endif                          /* __KERNEL__ */
  92
  93 #endif                          /* _BLACKFIN_PAGE_H */