include/asm-powerpc/page_32.h

   1 #ifndef _ASM_POWERPC_PAGE_32_H
   2 #define _ASM_POWERPC_PAGE_32_H
   3 #ifdef __KERNEL__
   4
   5 #define VM_DATA_DEFAULT_FLAGS   VM_DATA_DEFAULT_FLAGS32
   6
   7 #define PPC_MEMSTART    0
   8
   9 #ifndef __ASSEMBLY__
  10 /*
  11  * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
  12  * physical addressing.  For now this just the IBM PPC440.
  13  */
  14 #ifdef CONFIG_PTE_64BIT
  15 typedef unsigned long long pte_basic_t;
  16 #define PTE_SHIFT       (PAGE_SHIFT - 3)        /* 512 ptes per page */
  17 #define PTE_FMT         "%16Lx"
  18 #else
  19 typedef unsigned long pte_basic_t;
  20 #define PTE_SHIFT       (PAGE_SHIFT - 2)        /* 1024 ptes per page */
  21 #define PTE_FMT         "%.8lx"
  22 #endif
  23
  24 struct page;
  25 extern void clear_pages(void *page, int order);
  26 static inline void clear_page(void *page) { clear_pages(page, 0); }
  27 extern void copy_page(void *to, void *from);
  28
  29 /* Pure 2^n version of get_order */
  30 extern __inline__ int get_order(unsigned long size)
  31 {
  32         int lz;
  33
  34         size = (size-1) >> PAGE_SHIFT;
  35         asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
  36         return 32 - lz;
  37 }
  38
  39 #endif /* __ASSEMBLY__ */
  40
  41 #endif /* __KERNEL__ */
  42 #endif /* _ASM_POWERPC_PAGE_32_H */