Release 4.10 arch/x86/include/asm/sparsemem.h

#ifndef _ASM_X86_SPARSEMEM_H

#define _ASM_X86_SPARSEMEM_H

#ifdef CONFIG_SPARSEMEM
/*
 * generic non-linear memory support:
 *
 * 1) we will not split memory into more chunks than will fit into the flags
 *    field of the struct page
 *
 * SECTION_SIZE_BITS            2^n: size of each section
 * MAX_PHYSADDR_BITS            2^n: max size of physical address space
 * MAX_PHYSMEM_BITS             2^n: how much memory we can have in that space
 *
 */

#ifdef CONFIG_X86_32
# ifdef CONFIG_X86_PAE

#  define SECTION_SIZE_BITS	29

#  define MAX_PHYSADDR_BITS	36

#  define MAX_PHYSMEM_BITS	36
# else

#  define SECTION_SIZE_BITS	26

#  define MAX_PHYSADDR_BITS	32

#  define MAX_PHYSMEM_BITS	32
# endif
#else /* CONFIG_X86_32 */

# define SECTION_SIZE_BITS	27 
/* matt - 128 is convenient right now */

# define MAX_PHYSADDR_BITS	44

# define MAX_PHYSMEM_BITS	46
#endif

#endif /* CONFIG_SPARSEMEM */
#endif /* _ASM_X86_SPARSEMEM_H */
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thomas gleixner
thomas gleixner
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h. peter anvin
h. peter anvin
3
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1
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jack steiner
jack steiner
1
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jeremy fitzhardinge
jeremy fitzhardinge
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rik van riel
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Directory: arch/x86/include/asm

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