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/* K8 NUMA support */ /* Copyright 2002,2003 by Andi Kleen, SuSE Labs */ /* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */ #ifndef _ASM_X86_64_MMZONE_H #define _ASM_X86_64_MMZONE_H 1 #ifdef CONFIG_NUMA #define VIRTUAL_BUG_ON(x) #include <asm/smp.h> /* Simple perfect hash to map physical addresses to node numbers */ struct memnode { int shift; unsigned int mapsize; u8 *map; u8 embedded_map[64-16]; } ____cacheline_aligned; /* total size = 64 bytes */ extern struct memnode memnode; #define memnode_shift memnode.shift #define memnodemap memnode.map #define memnodemapsize memnode.mapsize extern struct pglist_data *node_data[]; static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) { unsigned nid; VIRTUAL_BUG_ON(!memnodemap); VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize); nid = memnodemap[addr >> memnode_shift]; VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); return nid; } #define NODE_DATA(nid) (node_data[nid]) #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ NODE_DATA(nid)->node_spanned_pages) #ifdef CONFIG_DISCONTIGMEM #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT) extern int pfn_valid(unsigned long pfn); #endif #ifdef CONFIG_NUMA_EMU #define FAKE_NODE_MIN_SIZE (64*1024*1024) #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1uL)) #endif #endif #endif |