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39 lines
776 B
C
39 lines
776 B
C
#ifndef __CR_ASM_PAGE_H__
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#define __CR_ASM_PAGE_H__
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#define ARCH_HAS_LONG_PAGES
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#ifndef CR_NOGLIBC
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#include <string.h> /* ffsl() */
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#include <unistd.h> /* _SC_PAGESIZE */
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static unsigned __page_size;
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static unsigned __page_shift;
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static inline unsigned page_size(void)
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{
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if (!__page_size)
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__page_size = sysconf(_SC_PAGESIZE);
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return __page_size;
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}
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static inline unsigned page_shift(void)
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{
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if (!__page_shift)
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__page_shift = (ffsl(page_size()) - 1);
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return __page_shift;
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}
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#define PAGE_SIZE page_size()
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#define PAGE_SHIFT page_shift()
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#define PAGE_MASK (~(PAGE_SIZE - 1))
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#define PAGE_PFN(addr) ((addr) / PAGE_SIZE)
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#else /* CR_NOGLIBC */
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extern unsigned page_size(void);
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#define PAGE_SIZE page_size()
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#endif /* CR_NOGLIBC */
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#endif /* __CR_ASM_PAGE_H__ */
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