[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / ia64 / kernel / numa.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * ia64 kernel NUMA specific stuff
 *
 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
 * Copyright (C) 2004 Silicon Graphics, Inc.
 *   Jesse Barnes <jbarnes@sgi.com>
 */
#include <linux/topology.h>
#include <linux/module.h>
#include <asm/processor.h>
#include <asm/smp.h>

u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
EXPORT_SYMBOL(cpu_to_node_map);

cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;

/**
 * build_cpu_to_node_map - setup cpu to node and node to cpumask arrays
 *
 * Build cpu to node mapping and initialize the per node cpu masks using
 * info from the node_cpuid array handed to us by ACPI.
 */
void __init build_cpu_to_node_map(void)
{
	int cpu, i, node;

	for(node=0; node < MAX_NUMNODES; node++)
		cpus_clear(node_to_cpu_mask[node]);

	for(cpu = 0; cpu < NR_CPUS; ++cpu) {
		node = -1;
		for (i = 0; i < NR_CPUS; ++i)
			if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
				node = node_cpuid[i].nid;
				break;
			}
		cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
		if (node >= 0)
			cpu_set(cpu, node_to_cpu_mask[node]);
	}
}
Commit	Line	Data
8d7e3517 TL	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	*/
8d7e3517 TL	22	#include <linux/topology.h>
	23	#include <linux/module.h>
	24	#include <asm/processor.h>
	25	#include <asm/smp.h>
	26
a9de9835	27	u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
8d7e3517 TL	28	EXPORT_SYMBOL(cpu_to_node_map);
	29
	30	cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
	31
	32	/**
	33	* build_cpu_to_node_map - setup cpu to node and node to cpumask arrays
	34	*
	35	* Build cpu to node mapping and initialize the per node cpu masks using
	36	* info from the node_cpuid array handed to us by ACPI.
	37	*/
	38	void __init build_cpu_to_node_map(void)
	39	{
	40	int cpu, i, node;
	41
	42	for(node=0; node < MAX_NUMNODES; node++)
	43	cpus_clear(node_to_cpu_mask[node]);
	44
	45	for(cpu = 0; cpu < NR_CPUS; ++cpu) {
	46	node = -1;
	47	for (i = 0; i < NR_CPUS; ++i)
	48	if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
	49	node = node_cpuid[i].nid;
	50	break;
	51	}
	52	cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
	53	if (node >= 0)
	54	cpu_set(cpu, node_to_cpu_mask[node]);
	55	}
	56	}