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sparsemem.h
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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 */