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kernel/linux-rt-4.4.41/arch/frv/include/asm/page.h 2.14 KB
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  #ifndef _ASM_PAGE_H
  #define _ASM_PAGE_H
  
  #include <asm/virtconvert.h>
  #include <asm/mem-layout.h>
  #include <asm/sections.h>
  #include <asm/setup.h>
  
  #ifndef __ASSEMBLY__
  
  #define get_user_page(vaddr)			__get_free_page(GFP_KERNEL)
  #define free_user_page(page, addr)		free_page(addr)
  
  #define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)
  #define copy_page(to,from)			memcpy((to), (from), PAGE_SIZE)
  
  #define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
  #define copy_user_page(vto, vfrom, vaddr, topg)	memcpy((vto), (vfrom), PAGE_SIZE)
  
  /*
   * These are used to make use of C type-checking..
   */
  typedef struct { unsigned long	pte;	} pte_t;
  typedef struct { unsigned long	ste[64];} pmd_t;
  typedef struct { pmd_t		pue[1]; } pud_t;
  typedef struct { pud_t		pge[1];	} pgd_t;
  typedef struct { unsigned long	pgprot;	} pgprot_t;
  typedef struct page *pgtable_t;
  
  #define pte_val(x)	((x).pte)
  #define pmd_val(x)	((x).ste[0])
  #define pud_val(x)	((x).pue[0])
  #define pgd_val(x)	((x).pge[0])
  #define pgprot_val(x)	((x).pgprot)
  
  #define __pte(x)	((pte_t) { (x) } )
  #define __pmd(x)	((pmd_t) { (x) } )
  #define __pud(x)	((pud_t) { (x) } )
  #define __pgd(x)	((pgd_t) { (x) } )
  #define __pgprot(x)	((pgprot_t) { (x) } )
  #define PTE_MASK	PAGE_MASK
  
  #define devmem_is_allowed(pfn)	1
  
  #define __pa(vaddr)		virt_to_phys((void *) (unsigned long) (vaddr))
  #define __va(paddr)		phys_to_virt((unsigned long) (paddr))
  
  #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
  
  extern unsigned long max_low_pfn;
  extern unsigned long min_low_pfn;
  extern unsigned long max_pfn;
  
  #ifdef CONFIG_MMU
  #define pfn_valid(pfn)		((pfn) < max_mapnr)
  #else
  #define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
  #define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
  
  #endif
  
  #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
  
  
  #define VM_DATA_DEFAULT_FLAGS \
  	(VM_READ | VM_WRITE | \
  	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
  		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  
  #endif /* __ASSEMBLY__ */
  
  #include <asm-generic/memory_model.h>
  #include <asm-generic/getorder.h>
  
  #endif /* _ASM_PAGE_H */