| #ifndef _ASM_X86_64_SPARSEMEM_H | |
| #define _ASM_X86_64_SPARSEMEM_H 1 | |
| #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_PHYSADDR_BITS 2^n: max size of physical address space | |
| * MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space | |
| * | |
| */ | |
| #define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ | |
| #define MAX_PHYSADDR_BITS 40 | |
| #define MAX_PHYSMEM_BITS 40 | |
| extern int early_pfn_to_nid(unsigned long pfn); | |
| #endif /* CONFIG_SPARSEMEM */ | |
| #endif /* _ASM_X86_64_SPARSEMEM_H */ |