include/asm-cris/page.h

   1 #ifndef _CRIS_PAGE_H
   2 #define _CRIS_PAGE_H
   3
   4 #include <linux/config.h>
   5 #include <asm/arch/page.h>
   6
   7 /* PAGE_SHIFT determines the page size */
   8 #define PAGE_SHIFT      13
   9 #ifndef __ASSEMBLY__
  10 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  11 #else
  12 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  13 #endif
  14 #define PAGE_MASK       (~(PAGE_SIZE-1))
  15
  16 #ifdef __KERNEL__
  17
  18 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
  19 #define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
  20
  21 #define clear_user_page(page, vaddr, pg)    clear_page(page)
  22 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
  23
  24 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
  25 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  26
  27 /*
  28  * These are used to make use of C type-checking..
  29  */
  30 #ifndef __ASSEMBLY__
  31 typedef struct { unsigned long pte; } pte_t;
  32 typedef struct { unsigned long pgd; } pgd_t;
  33 typedef struct { unsigned long pgprot; } pgprot_t;
  34 #endif
  35
  36 #define pte_val(x)      ((x).pte)
  37 #define pgd_val(x)      ((x).pgd)
  38 #define pgprot_val(x)   ((x).pgprot)
  39
  40 #define __pte(x)        ((pte_t) { (x) } )
  41 #define __pgd(x)        ((pgd_t) { (x) } )
  42 #define __pgprot(x)     ((pgprot_t) { (x) } )
  43
  44 /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
  45 /* for that before indexing into the page table starting at mem_map    */
  46 #define pfn_to_page(pfn)        (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)))
  47 #define page_to_pfn(page)       ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT))
  48 #define pfn_valid(pfn)          (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
  49
  50 /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
  51  * we can let the map start there. notice that we subtract PAGE_OFFSET because
  52  * we start our mem_map there - in other ports they map mem_map physically and
  53  * use __pa instead. in our system both the physical and virtual address of DRAM
  54  * is too high to let mem_map start at 0, so we do it this way instead (similar
  55  * to arm and m68k I think)
  56  */
  57
  58 #define virt_to_page(kaddr)    (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
  59 #define VALID_PAGE(page)       (((page) - mem_map) < max_mapnr)
  60 #define virt_addr_valid(kaddr)  pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
  61
  62 /* convert a page (based on mem_map and forward) to a physical address
  63  * do this by figuring out the virtual address and then use __pa
  64  */
  65
  66 #define page_to_phys(page)     __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
  67
  68 /* to align the pointer to the (next) page boundary */
  69 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  70
  71 #ifndef __ASSEMBLY__
  72
  73 #endif /* __ASSEMBLY__ */
  74
  75 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  76                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  77
  78 #endif /* __KERNEL__ */
  79
  80 #include <asm-generic/page.h>
  81
  82 #endif /* _CRIS_PAGE_H */
  83