sparsemem.h (1102B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_SPARSEMEM_H 3#define _ASM_X86_SPARSEMEM_H 4 5#ifdef CONFIG_SPARSEMEM 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_PHYSMEM_BITS 2^n: max size of physical address space 14 * 15 */ 16 17#ifdef CONFIG_X86_32 18# ifdef CONFIG_X86_PAE 19# define SECTION_SIZE_BITS 29 20# define MAX_PHYSMEM_BITS 36 21# else 22# define SECTION_SIZE_BITS 26 23# define MAX_PHYSMEM_BITS 32 24# endif 25#else /* CONFIG_X86_32 */ 26# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ 27# define MAX_PHYSMEM_BITS (pgtable_l5_enabled() ? 52 : 46) 28#endif 29 30#endif /* CONFIG_SPARSEMEM */ 31 32#ifndef __ASSEMBLY__ 33#ifdef CONFIG_NUMA_KEEP_MEMINFO 34extern int phys_to_target_node(phys_addr_t start); 35#define phys_to_target_node phys_to_target_node 36extern int memory_add_physaddr_to_nid(u64 start); 37#define memory_add_physaddr_to_nid memory_add_physaddr_to_nid 38#endif 39#endif /* __ASSEMBLY__ */ 40 41#endif /* _ASM_X86_SPARSEMEM_H */