[linux-2.6-block.git] / arch / arm / include / asm / sparsemem.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ASMARM_SPARSEMEM_H
#define ASMARM_SPARSEMEM_H

#include <asm/memory.h>

/*
 * Two definitions are required for sparsemem:
 *
 * MAX_PHYSMEM_BITS: The number of physical address bits required
 *   to address the last byte of memory.
 *
 * SECTION_SIZE_BITS: The number of physical address bits to cover
 *   the maximum amount of memory in a section.
 *
 * Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000,
 * then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26.
 *
 * These can be overridden in your mach/memory.h.
 */
#if !defined(MAX_PHYSMEM_BITS) || !defined(SECTION_SIZE_BITS)
#define MAX_PHYSMEM_BITS	36
#define SECTION_SIZE_BITS	28
#endif

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
05944d74 RK	2	#ifndef ASMARM_SPARSEMEM_H
	3	#define ASMARM_SPARSEMEM_H
	4
	5	#include <asm/memory.h>
	6
07f841b7 RK	7	/*
	8	* Two definitions are required for sparsemem:
	9	*
	10	* MAX_PHYSMEM_BITS: The number of physical address bits required
	11	* to address the last byte of memory.
	12	*
	13	* SECTION_SIZE_BITS: The number of physical address bits to cover
	14	* the maximum amount of memory in a section.
	15	*
	16	* Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000,
	17	* then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26.
	18	*
db57f88e	19	* These can be overridden in your mach/memory.h.
07f841b7	20	*/
db57f88e KC	21	#if !defined(MAX_PHYSMEM_BITS) \|\| !defined(SECTION_SIZE_BITS)
	22	#define MAX_PHYSMEM_BITS 36
	23	#define SECTION_SIZE_BITS 28
07f841b7	24	#endif
05944d74 RK	25
05944d74 RK	26	#endif