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kernel/linux-rt-4.4.41/arch/powerpc/include/asm/page_32.h 1.29 KB
5113f6f70   김현기   kernel add
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  #ifndef _ASM_POWERPC_PAGE_32_H
  #define _ASM_POWERPC_PAGE_32_H
  
  #if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
  #if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
  #error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
  #endif
  #endif
  
  #define VM_DATA_DEFAULT_FLAGS	VM_DATA_DEFAULT_FLAGS32
  
  #ifdef CONFIG_NOT_COHERENT_CACHE
  #define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
  #endif
  
  #ifdef CONFIG_PTE_64BIT
  #define PTE_FLAGS_OFFSET	4	/* offset of PTE flags, in bytes */
  #else
  #define PTE_FLAGS_OFFSET	0
  #endif
  
  #ifdef CONFIG_PPC_256K_PAGES
  #define PTE_SHIFT	(PAGE_SHIFT - PTE_T_LOG2 - 2)	/* 1/4 of a page */
  #else
  #define PTE_SHIFT	(PAGE_SHIFT - PTE_T_LOG2)	/* full page */
  #endif
  
  #ifndef __ASSEMBLY__
  /*
   * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
   * physical addressing.
   */
  #ifdef CONFIG_PTE_64BIT
  typedef unsigned long long pte_basic_t;
  #else
  typedef unsigned long pte_basic_t;
  #endif
  
  struct page;
  extern void clear_pages(void *page, int order);
  static inline void clear_page(void *page) { clear_pages(page, 0); }
  extern void copy_page(void *to, void *from);
  
  #include <asm-generic/getorder.h>
  
  #define PGD_T_LOG2	(__builtin_ffs(sizeof(pgd_t)) - 1)
  #define PTE_T_LOG2	(__builtin_ffs(sizeof(pte_t)) - 1)
  
  #endif /* __ASSEMBLY__ */
  
  #endif /* _ASM_POWERPC_PAGE_32_H */