1 #ifndef _ASM_IA64_SPARSEMEM_H 2 #define _ASM_IA64_SPARSEMEM_H 3 4 #ifdef CONFIG_SPARSEMEM 5 /* 6 * SECTION_SIZE_BITS 2^N: how big each section will be 7 * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space 8 */ 9 10 #define SECTION_SIZE_BITS (30) 11 #define MAX_PHYSMEM_BITS (50) 12 #ifdef CONFIG_FORCE_MAX_ZONEORDER 13 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS) 14 #undef SECTION_SIZE_BITS 15 #define SECTION_SIZE_BITS (CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) 16 #endif 17 #endif 18 19 #endif /* CONFIG_SPARSEMEM */ 20 #endif /* _ASM_IA64_SPARSEMEM_H */ 21