1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef ASMARM_SPARSEMEM_H 3 #define ASMARM_SPARSEMEM_H 4 5 #include <asm/page.h> 6 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 * 19 * These can be overridden in your mach/memory.h. 20 */ 21 #if !defined(MAX_PHYSMEM_BITS) || !defined(SECTION_SIZE_BITS) 22 #define MAX_PHYSMEM_BITS 36 23 #define SECTION_SIZE_BITS 28 24 #endif 25 26 #endif 27