| #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 */ |