mirror of https://gitee.com/openkylin/linux.git
41 lines
1015 B
C
41 lines
1015 B
C
#ifndef _ASM_POWERPC_PAGE_32_H
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#define _ASM_POWERPC_PAGE_32_H
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#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
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#define PPC_MEMSTART 0
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#ifndef __ASSEMBLY__
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/*
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* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
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* physical addressing. For now this just the IBM PPC440.
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*/
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#ifdef CONFIG_PTE_64BIT
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typedef unsigned long long pte_basic_t;
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#define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */
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#define PTE_FMT "%16Lx"
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#else
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typedef unsigned long pte_basic_t;
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#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
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#define PTE_FMT "%.8lx"
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#endif
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struct page;
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extern void clear_pages(void *page, int order);
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static inline void clear_page(void *page) { clear_pages(page, 0); }
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extern void copy_page(void *to, void *from);
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/* Pure 2^n version of get_order */
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extern __inline__ int get_order(unsigned long size)
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{
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int lz;
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size = (size-1) >> PAGE_SHIFT;
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asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
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return 32 - lz;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_PAGE_32_H */
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