| #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 */ |
