arch/score/include/asm/page.h

   1 #ifndef _ASM_SCORE_PAGE_H
   2 #define _ASM_SCORE_PAGE_H
   3
   4 #include <linux/pfn.h>
   5
   6 /* PAGE_SHIFT determines the page size */
   7 #define PAGE_SHIFT      (12)
   8 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
   9 #define PAGE_MASK       (~(PAGE_SIZE-1))
  10
  11 #ifdef __KERNEL__
  12
  13 #ifndef __ASSEMBLY__
  14
  15 #define PAGE_UP(addr)   (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
  16 #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
  17
  18 /* align addr on a size boundary - adjust address up/down if needed */
  19 #define _ALIGN_UP(addr, size)   (((addr)+((size)-1))&(~((size)-1)))
  20 #define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
  21
  22 /* align addr on a size boundary - adjust address up if needed */
  23 #define _ALIGN(addr, size)      _ALIGN_UP(addr, size)
  24
  25 /*
  26  * PAGE_OFFSET -- the first address of the first page of memory. When not
  27  * using MMU this corresponds to the first free page in physical memory (aligned
  28  * on a page boundary).
  29  */
  30 #define PAGE_OFFSET             (0xA0000000UL)
  31
  32 #define clear_page(pgaddr)                      memset((pgaddr), 0, PAGE_SIZE)
  33 #define copy_page(to, from)                     memcpy((to), (from), PAGE_SIZE)
  34
  35 #define clear_user_page(pgaddr, vaddr, page)    memset((pgaddr), 0, PAGE_SIZE)
  36 #define copy_user_page(vto, vfrom, vaddr, topg) \
  37                         memcpy((vto), (vfrom), PAGE_SIZE)
  38
  39 /*
  40  * These are used to make use of C type-checking..
  41  */
  42
  43 typedef struct { unsigned long pte; } pte_t;            /* page table entry */
  44 typedef struct { unsigned long pgd; } pgd_t;            /* PGD table entry */
  45 typedef struct { unsigned long pgprot; } pgprot_t;
  46 typedef struct page *pgtable_t;
  47
  48 #define pte_val(x)      ((x).pte)
  49 #define pgd_val(x)      ((x).pgd)
  50 #define pgprot_val(x)   ((x).pgprot)
  51
  52 #define __pte(x)        ((pte_t) { (x) })
  53 #define __pgd(x)        ((pgd_t) { (x) })
  54 #define __pgprot(x)     ((pgprot_t) { (x) })
  55
  56 extern unsigned long max_low_pfn;
  57 extern unsigned long min_low_pfn;
  58 extern unsigned long max_pfn;
  59
  60 #define __pa(vaddr)             ((unsigned long) (vaddr))
  61 #define __va(paddr)             ((void *) (paddr))
  62
  63 #define phys_to_pfn(phys)       (PFN_DOWN(phys))
  64 #define pfn_to_phys(pfn)        (PFN_PHYS(pfn))
  65
  66 #define virt_to_pfn(vaddr)      (phys_to_pfn((__pa(vaddr))))
  67 #define pfn_to_virt(pfn)        __va(pfn_to_phys((pfn)))
  68
  69 #define virt_to_page(vaddr)     (pfn_to_page(virt_to_pfn(vaddr)))
  70 #define page_to_virt(page)      (pfn_to_virt(page_to_pfn(page)))
  71
  72 #define page_to_phys(page)      (pfn_to_phys(page_to_pfn(page)))
  73 #define page_to_bus(page)       (page_to_phys(page))
  74 #define phys_to_page(paddr)     (pfn_to_page(phys_to_pfn(paddr)))
  75
  76 #define pfn_valid(pfn)          ((pfn) >= min_low_pfn && (pfn) < max_mapnr)
  77
  78 #define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
  79
  80 #endif /* __ASSEMBLY__ */
  81
  82 #define virt_addr_valid(vaddr)  (pfn_valid(virt_to_pfn(vaddr)))
  83
  84 #endif /* __KERNEL__ */
  85
  86 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  87                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  88
  89 #include <asm-generic/memory_model.h>
  90 #include <asm-generic/getorder.h>
  91
  92 #endif /* _ASM_SCORE_PAGE_H */