| Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_64_SPARSEMEM_H |
| 2 | #define _ASM_X86_64_SPARSEMEM_H 1 |
| 3 | |
| 4 | #ifdef CONFIG_SPARSEMEM |
| 5 | |
| 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_PHYSADDR_BITS 2^n: max size of physical address space |
| 14 | * MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ |
| 19 | #define MAX_PHYSADDR_BITS 40 |
| 20 | #define MAX_PHYSMEM_BITS 40 |
| 21 | |
| 22 | extern int early_pfn_to_nid(unsigned long pfn); |
| 23 | |
| 24 | #endif /* CONFIG_SPARSEMEM */ |
| 25 | |
| 26 | #endif /* _ASM_X86_64_SPARSEMEM_H */ |