| Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 1 | #ifndef _I386_SPARSEMEM_H |
| 2 | #define _I386_SPARSEMEM_H |
| 3 | #ifdef CONFIG_SPARSEMEM |
| 4 | |
| 5 | /* |
| 6 | * generic non-linear memory support: |
| 7 | * |
| 8 | * 1) we will not split memory into more chunks than will fit into the |
| 9 | * flags field of the struct page |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * SECTION_SIZE_BITS 2^N: how big each section will be |
| 14 | * MAX_PHYSADDR_BITS 2^N: how much physical address space we have |
| 15 | * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space |
| 16 | */ |
| 17 | #ifdef CONFIG_X86_PAE |
| 18 | #define SECTION_SIZE_BITS 30 |
| 19 | #define MAX_PHYSADDR_BITS 36 |
| 20 | #define MAX_PHYSMEM_BITS 36 |
| 21 | #else |
| 22 | #define SECTION_SIZE_BITS 26 |
| 23 | #define MAX_PHYSADDR_BITS 32 |
| 24 | #define MAX_PHYSMEM_BITS 32 |
| 25 | #endif |
| 26 | |
| 27 | /* XXX: FIXME -- wli */ |
| 28 | #define kern_addr_valid(kaddr) (0) |
| 29 | |
| 30 | #endif /* CONFIG_SPARSEMEM */ |
| 31 | #endif /* _I386_SPARSEMEM_H */ |