1 /* K8 NUMA support */ 2 /* Copyright 2002,2003 by Andi Kleen, SuSE Labs */ 3 /* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */ 4 #ifndef _ASM_X86_MMZONE_64_H 5 #define _ASM_X86_MMZONE_64_H 6 7 8 #ifdef CONFIG_NUMA 9 10 #include <linux/mmdebug.h> 11 12 #include <asm/smp.h> 13 14 /* Simple perfect hash to map physical addresses to node numbers */ 15 struct memnode { 16 int shift; 17 unsigned int mapsize; 18 s16 *map; 19 s16 embedded_map[64 - 8]; 20 } ____cacheline_aligned; /* total size = 128 bytes */ 21 extern struct memnode memnode; 22 #define memnode_shift memnode.shift 23 #define memnodemap memnode.map 24 #define memnodemapsize memnode.mapsize 25 26 extern struct pglist_data *node_data[]; 27 28 static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) 29 { 30 unsigned nid; 31 VIRTUAL_BUG_ON(!memnodemap); 32 nid = memnodemap[addr >> memnode_shift]; 33 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); 34 return nid; 35 } 36 37 #define NODE_DATA(nid) (node_data[nid]) 38 39 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) 40 #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ 41 NODE_DATA(nid)->node_spanned_pages) 42 43 #ifdef CONFIG_NUMA_EMU 44 #define FAKE_NODE_MIN_SIZE (64 * 1024 * 1024) 45 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL)) 46 #endif 47 48 #endif 49 #endif /* _ASM_X86_MMZONE_64_H */ 50