1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 24baa9922SRussell King #ifndef ASMARM_SPARSEMEM_H 34baa9922SRussell King #define ASMARM_SPARSEMEM_H 44baa9922SRussell King 5*a9ff6961SLinus Walleij #include <asm/page.h> 64baa9922SRussell King 707f841b7SRussell King /* 807f841b7SRussell King * Two definitions are required for sparsemem: 907f841b7SRussell King * 1007f841b7SRussell King * MAX_PHYSMEM_BITS: The number of physical address bits required 1107f841b7SRussell King * to address the last byte of memory. 1207f841b7SRussell King * 1307f841b7SRussell King * SECTION_SIZE_BITS: The number of physical address bits to cover 1407f841b7SRussell King * the maximum amount of memory in a section. 1507f841b7SRussell King * 1607f841b7SRussell King * Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000, 1707f841b7SRussell King * then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26. 1807f841b7SRussell King * 19db57f88eSKevin Cernekee * These can be overridden in your mach/memory.h. 2007f841b7SRussell King */ 21db57f88eSKevin Cernekee #if !defined(MAX_PHYSMEM_BITS) || !defined(SECTION_SIZE_BITS) 22db57f88eSKevin Cernekee #define MAX_PHYSMEM_BITS 36 23db57f88eSKevin Cernekee #define SECTION_SIZE_BITS 28 2407f841b7SRussell King #endif 254baa9922SRussell King 264baa9922SRussell King #endif 27