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_64_MMZONE_H 5#define _ASM_X86_64_MMZONE_H 1 6 7 8#ifdef CONFIG_NUMA 9 10#define VIRTUAL_BUG_ON(x) 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 u8 *map; 19 u8 embedded_map[64-16]; 20} ____cacheline_aligned; /* total size = 64 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 VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize); 33 nid = memnodemap[addr >> memnode_shift]; 34 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); 35 return nid; 36} 37 38#define NODE_DATA(nid) (node_data[nid]) 39 40#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) 41#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ 42 NODE_DATA(nid)->node_spanned_pages) 43 44#ifdef CONFIG_DISCONTIGMEM 45#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT) 46 47extern int pfn_valid(unsigned long pfn); 48#endif 49 50#ifdef CONFIG_NUMA_EMU 51#define FAKE_NODE_MIN_SIZE (64*1024*1024) 52#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1uL)) 53#endif 54 55#endif 56#endif 57