projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 77ef50a5 VN |
1 | #ifndef ASM_X86__SPARSEMEM_H |
| 2 | #define ASM_X86__SPARSEMEM_H | |
| 8a423ff0 TG |
3 | |
| 4 | #ifdef CONFIG_SPARSEMEM | |
| 5 | /* | |
| 6 | * generic non-linear memory support: | |
| 7 | * | |
| 8 | * 1) we will not split memory into more chunks than will fit into the flags | |
| 9 | * field of the struct page | |
| 10 | * | |
| 11 | * SECTION_SIZE_BITS 2^n: size of each section | |
| 12 | * MAX_PHYSADDR_BITS 2^n: max size of physical address space | |
| 13 | * MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space | |
| 14 | * | |
| 15 | */ | |
| 16 | ||
| 96a388de | 17 | #ifdef CONFIG_X86_32 |
| 8a423ff0 | 18 | # ifdef CONFIG_X86_PAE |
| fb8e8375 | 19 | # define SECTION_SIZE_BITS 29 |
| 8a423ff0 TG |
20 | # define MAX_PHYSADDR_BITS 36 |
| 21 | # define MAX_PHYSMEM_BITS 36 | |
| 22 | # else | |
| 23 | # define SECTION_SIZE_BITS 26 | |
| 24 | # define MAX_PHYSADDR_BITS 32 | |
| 25 | # define MAX_PHYSMEM_BITS 32 | |
| 26 | # endif | |
| 27 | #else /* CONFIG_X86_32 */ | |
| 28 | # define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ | |
| 8434e73d JS |
29 | # define MAX_PHYSADDR_BITS 44 |
| 30 | # define MAX_PHYSMEM_BITS 44 | |
| 8a423ff0 TG |
31 | #endif |
| 32 | ||
| 33 | #endif /* CONFIG_SPARSEMEM */ | |
| 77ef50a5 | 34 | #endif /* ASM_X86__SPARSEMEM_H */ |