1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * This file contains NUMA specific prototypes and definitions. 7 * 8 * 2002/08/05 Erich Focht <efocht@ess.nec.de> 9 * 10 */ 11#ifndef _ASM_IA64_NUMA_H 12#define _ASM_IA64_NUMA_H 13 14 15#ifdef CONFIG_NUMA 16 17#include <linux/cache.h> 18#include <linux/cpumask.h> 19#include <linux/numa.h> 20#include <linux/smp.h> 21#include <linux/threads.h> 22 23#include <asm/mmzone.h> 24 25extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned; 26extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; 27 28/* Stuff below this line could be architecture independent */ 29 30extern int num_node_memblks; /* total number of memory chunks */ 31 32/* 33 * List of node memory chunks. Filled when parsing SRAT table to 34 * obtain information about memory nodes. 35*/ 36 37struct node_memblk_s { 38 unsigned long start_paddr; 39 unsigned long size; 40 int nid; /* which logical node contains this chunk? */ 41 int bank; /* which mem bank on this node */ 42}; 43 44struct node_cpuid_s { 45 u16 phys_id; /* id << 8 | eid */ 46 int nid; /* logical node containing this CPU */ 47}; 48 49extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS]; 50extern struct node_cpuid_s node_cpuid[NR_CPUS]; 51 52/* 53 * ACPI 2.0 SLIT (System Locality Information Table) 54 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf 55 * 56 * This is a matrix with "distances" between nodes, they should be 57 * proportional to the memory access latency ratios. 58 */ 59 60extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES]; 61#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)]) 62 63extern int paddr_to_nid(unsigned long paddr); 64 65#define local_nodeid (cpu_to_node_map[smp_processor_id()]) 66 67extern void map_cpu_to_node(int cpu, int nid); 68extern void unmap_cpu_from_node(int cpu, int nid); 69 70 71#else /* !CONFIG_NUMA */ 72#define map_cpu_to_node(cpu, nid) do{}while(0) 73#define unmap_cpu_from_node(cpu, nid) do{}while(0) 74 75#define paddr_to_nid(addr) 0 76 77#endif /* CONFIG_NUMA */ 78 79#endif /* _ASM_IA64_NUMA_H */ 80