[linux.git] / include / asm-x86_64 / sparsemem.h

#ifndef _ASM_X86_64_SPARSEMEM_H
#define _ASM_X86_64_SPARSEMEM_H 1

#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
 *
 */

#define SECTION_SIZE_BITS	27 /* matt - 128 is convenient right now */
#define MAX_PHYSADDR_BITS	40
#define MAX_PHYSMEM_BITS	40

extern int early_pfn_to_nid(unsigned long pfn);

#endif /* CONFIG_SPARSEMEM */

#endif /* _ASM_X86_64_SPARSEMEM_H */
Commit	Line	Data
bbfceef4 MT	1	#ifndef _ASM_X86_64_SPARSEMEM_H
	2	#define _ASM_X86_64_SPARSEMEM_H 1
	3
	4	#ifdef CONFIG_SPARSEMEM
	5
	6	/*
	7	* generic non-linear memory support:
	8	*
	9	* 1) we will not split memory into more chunks than will fit into the flags
	10	* field of the struct page
	11	*
	12	* SECTION_SIZE_BITS 2^n: size of each section
	13	* MAX_PHYSADDR_BITS 2^n: max size of physical address space
	14	* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
	15	*
	16	*/
	17
	18	#define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
	19	#define MAX_PHYSADDR_BITS 40
	20	#define MAX_PHYSMEM_BITS 40
	21
	22	extern int early_pfn_to_nid(unsigned long pfn);
	23
	24	#endif /* CONFIG_SPARSEMEM */
	25
	26	#endif /* _ASM_X86_64_SPARSEMEM_H */