[mirror_ubuntu-bionic-kernel.git] / include / asm-i386 / sparsemem.h

#ifndef _I386_SPARSEMEM_H
#define _I386_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: how big each section will be
 * MAX_PHYSADDR_BITS		2^N: how much physical address space we have
 * MAX_PHYSMEM_BITS		2^N: how much memory we can have in that space
 */
#ifdef CONFIG_X86_PAE
#define SECTION_SIZE_BITS       30
#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

/* XXX: FIXME -- wli */
#define kern_addr_valid(kaddr)  (0)

#endif /* CONFIG_SPARSEMEM */
#endif /* _I386_SPARSEMEM_H */
Commit	Line	Data
05b79bdc AW	1	#ifndef _I386_SPARSEMEM_H
	2	#define _I386_SPARSEMEM_H
	3	#ifdef CONFIG_SPARSEMEM
	4
	5	/*
	6	* generic non-linear memory support:
	7	*
	8	* 1) we will not split memory into more chunks than will fit into the
	9	* flags field of the struct page
	10	*/
	11
	12	/*
	13	* SECTION_SIZE_BITS 2^N: how big each section will be
	14	* MAX_PHYSADDR_BITS 2^N: how much physical address space we have
	15	* MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
	16	*/
	17	#ifdef CONFIG_X86_PAE
	18	#define SECTION_SIZE_BITS 30
	19	#define MAX_PHYSADDR_BITS 36
	20	#define MAX_PHYSMEM_BITS 36
	21	#else
	22	#define SECTION_SIZE_BITS 26
	23	#define MAX_PHYSADDR_BITS 32
	24	#define MAX_PHYSMEM_BITS 32
	25	#endif
	26
	27	/* XXX: FIXME -- wli */
	28	#define kern_addr_valid(kaddr) (0)
	29
	30	#endif /* CONFIG_SPARSEMEM */
	31	#endif /* _I386_SPARSEMEM_H */