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27 lines
678 B
27 lines
678 B
20 years ago
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#ifndef _ASM_X86_64_SPARSEMEM_H
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#define _ASM_X86_64_SPARSEMEM_H 1
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#ifdef CONFIG_SPARSEMEM
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/*
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* generic non-linear memory support:
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*
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* 1) we will not split memory into more chunks than will fit into the flags
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* field of the struct page
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*
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* SECTION_SIZE_BITS 2^n: size of each section
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* MAX_PHYSADDR_BITS 2^n: max size of physical address space
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* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
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*
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*/
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#define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
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#define MAX_PHYSADDR_BITS 40
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#define MAX_PHYSMEM_BITS 40
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extern int early_pfn_to_nid(unsigned long pfn);
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#endif /* CONFIG_SPARSEMEM */
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#endif /* _ASM_X86_64_SPARSEMEM_H */
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