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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_SPARSEMEM_H #define _ASM_X86_SPARSEMEM_H #include <linux/types.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: size of each section * MAX_PHYSMEM_BITS 2^n: max size of physical address space * */ #ifdef CONFIG_X86_32 # ifdef CONFIG_X86_PAE # define SECTION_SIZE_BITS 29 # define MAX_PHYSMEM_BITS 36 # else # define SECTION_SIZE_BITS 26 # define MAX_PHYSMEM_BITS 32 # endif #else /* CONFIG_X86_32 */ # define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ # define MAX_PHYSMEM_BITS (pgtable_l5_enabled() ? 52 : 46) #endif #endif /* CONFIG_SPARSEMEM */ #ifndef __ASSEMBLY__ #ifdef CONFIG_NUMA_KEEP_MEMINFO extern int phys_to_target_node(phys_addr_t start); #define phys_to_target_node phys_to_target_node extern int memory_add_physaddr_to_nid(u64 start); #define memory_add_physaddr_to_nid memory_add_physaddr_to_nid #endif #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_SPARSEMEM_H */