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 */ 15struct memnode { 16 int shift; 17 unsigned int mapsize; 18 s16 *map; 19 s16 embedded_map[64 - 8]; 20} ____cacheline_aligned; /* total size = 128 bytes */ 21extern struct memnode memnode; 22#define memnode_shift memnode.shift 23#define memnodemap memnode.map 24#define memnodemapsize memnode.mapsize 25 26extern struct pglist_data *node_data[]; 27 28static 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#endif 43#endif /* _ASM_X86_MMZONE_64_H */ 44