| Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License as published by |
| 4 | * the Free Software Foundation; either version 2 of the License, or |
| 5 | * (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 15 | * |
| 16 | * ia64 kernel NUMA specific stuff |
| 17 | * |
| 18 | * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de> |
| 19 | * Copyright (C) 2004 Silicon Graphics, Inc. |
| 20 | * Jesse Barnes <jbarnes@sgi.com> |
| 21 | */ |
| 22 | #include <linux/config.h> |
| 23 | #include <linux/topology.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <asm/processor.h> |
| 26 | #include <asm/smp.h> |
| 27 | |
| 28 | u8 cpu_to_node_map[NR_CPUS] __cacheline_aligned; |
| 29 | EXPORT_SYMBOL(cpu_to_node_map); |
| 30 | |
| 31 | cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; |
| 32 | |
| 33 | /** |
| 34 | * build_cpu_to_node_map - setup cpu to node and node to cpumask arrays |
| 35 | * |
| 36 | * Build cpu to node mapping and initialize the per node cpu masks using |
| 37 | * info from the node_cpuid array handed to us by ACPI. |
| 38 | */ |
| 39 | void __init build_cpu_to_node_map(void) |
| 40 | { |
| 41 | int cpu, i, node; |
| 42 | |
| 43 | for(node=0; node < MAX_NUMNODES; node++) |
| 44 | cpus_clear(node_to_cpu_mask[node]); |
| 45 | |
| 46 | for(cpu = 0; cpu < NR_CPUS; ++cpu) { |
| 47 | node = -1; |
| 48 | for (i = 0; i < NR_CPUS; ++i) |
| 49 | if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) { |
| 50 | node = node_cpuid[i].nid; |
| 51 | break; |
| 52 | } |
| 53 | cpu_to_node_map[cpu] = (node >= 0) ? node : 0; |
| 54 | if (node >= 0) |
| 55 | cpu_set(cpu, node_to_cpu_mask[node]); |
| 56 | } |
| 57 | } |