mirror of https://gitee.com/openkylin/linux.git
32 lines
786 B
C
32 lines
786 B
C
#ifndef _I386_SPARSEMEM_H
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#define _I386_SPARSEMEM_H
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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
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* flags field of the struct page
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*/
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/*
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* SECTION_SIZE_BITS 2^N: how big each section will be
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* MAX_PHYSADDR_BITS 2^N: how much physical address space we have
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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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#ifdef CONFIG_X86_PAE
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#define SECTION_SIZE_BITS 30
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#define MAX_PHYSADDR_BITS 36
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#define MAX_PHYSMEM_BITS 36
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#else
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#define SECTION_SIZE_BITS 26
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#define MAX_PHYSADDR_BITS 32
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#define MAX_PHYSMEM_BITS 32
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#endif
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/* XXX: FIXME -- wli */
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#define kern_addr_valid(kaddr) (0)
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#endif /* CONFIG_SPARSEMEM */
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#endif /* _I386_SPARSEMEM_H */
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