| #ifndef _I386_SPARSEMEM_H | |
| #define _I386_SPARSEMEM_H | |
| #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: how big each section will be | |
| * MAX_PHYSADDR_BITS 2^N: how much physical address space we have | |
| * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space | |
| */ | |
| #ifdef CONFIG_X86_PAE | |
| #define SECTION_SIZE_BITS 30 | |
| #define MAX_PHYSADDR_BITS 36 | |
| #define MAX_PHYSMEM_BITS 36 | |
| #else | |
| #define SECTION_SIZE_BITS 26 | |
| #define MAX_PHYSADDR_BITS 32 | |
| #define MAX_PHYSMEM_BITS 32 | |
| #endif | |
| /* XXX: FIXME -- wli */ | |
| #define kern_addr_valid(kaddr) (0) | |
| #endif /* CONFIG_SPARSEMEM */ | |
| #endif /* _I386_SPARSEMEM_H */ |