8d7e35174d
Jesse Barnes provided the original version of this patch months ago, but other changes kept conflicting with it, so it got deferred. Greg Edwards dug it out of obscurity just over a week ago, and almost immediately another conflicting patch appeared (Bob Picco's memory-less nodes). I've resolved the conflicts and got it running again. CONFIG_SGI_TIOCX is set to "y" in defconfig, which causes a Tiger to not boot (oops in tiocx_init). But that can be resolved later ... get this in now before it gets stale again. Signed-off-by: Tony Luck <tony.luck@intel.com>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ia64 kernel NUMA specific stuff
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*
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* Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
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* Copyright (C) 2004 Silicon Graphics, Inc.
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* Jesse Barnes <jbarnes@sgi.com>
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*/
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#include <linux/config.h>
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#include <linux/topology.h>
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#include <linux/module.h>
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#include <asm/processor.h>
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#include <asm/smp.h>
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u8 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
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EXPORT_SYMBOL(cpu_to_node_map);
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cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
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/**
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* build_cpu_to_node_map - setup cpu to node and node to cpumask arrays
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*
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* Build cpu to node mapping and initialize the per node cpu masks using
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* info from the node_cpuid array handed to us by ACPI.
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*/
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void __init build_cpu_to_node_map(void)
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{
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int cpu, i, node;
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for(node=0; node < MAX_NUMNODES; node++)
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cpus_clear(node_to_cpu_mask[node]);
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for(cpu = 0; cpu < NR_CPUS; ++cpu) {
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node = -1;
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for (i = 0; i < NR_CPUS; ++i)
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if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
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node = node_cpuid[i].nid;
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break;
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}
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cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
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if (node >= 0)
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cpu_set(cpu, node_to_cpu_mask[node]);
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}
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}
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