arch/x86/include/asm/page.h

   1 #ifndef _ASM_X86_PAGE_H
   2 #define _ASM_X86_PAGE_H
   3
   4 #include <linux/types.h>
   5
   6 #ifdef __KERNEL__
   7
   8 #include <asm/page_types.h>
   9
  10 #ifdef CONFIG_X86_64
  11 #include <asm/page_64.h>
  12 #else
  13 #include <asm/page_32.h>
  14 #endif  /* CONFIG_X86_64 */
  15
  16 #ifndef __ASSEMBLY__
  17
  18 struct page;
  19
  20 static inline void clear_user_page(void *page, unsigned long vaddr,
  21                                    struct page *pg)
  22 {
  23         clear_page(page);
  24 }
  25
  26 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
  27                                   struct page *topage)
  28 {
  29         copy_page(to, from);
  30 }
  31
  32 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
  33         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
  34 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  35
  36 #define __pa(x)         __phys_addr((unsigned long)(x))
  37 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
  38 /* __pa_symbol should be used for C visible symbols.
  39    This seems to be the official gcc blessed way to do such arithmetic. */
  40 #define __pa_symbol(x)  __pa(__phys_reloc_hide((unsigned long)(x)))
  41
  42 #define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
  43
  44 #define __boot_va(x)            __va(x)
  45 #define __boot_pa(x)            __pa(x)
  46
  47 /*
  48  * virt_to_page(kaddr) returns a valid pointer if and only if
  49  * virt_addr_valid(kaddr) returns true.
  50  */
  51 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  52 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
  53 extern bool __virt_addr_valid(unsigned long kaddr);
  54 #define virt_addr_valid(kaddr)  __virt_addr_valid((unsigned long) (kaddr))
  55
  56 #endif  /* __ASSEMBLY__ */
  57
  58 #include <asm-generic/memory_model.h>
  59 #include <asm-generic/getorder.h>
  60
  61 #define __HAVE_ARCH_GATE_AREA 1
  62
  63 #endif  /* __KERNEL__ */
  64 #endif /* _ASM_X86_PAGE_H */