/*

 * include/linux/topology.h

 *

 * Written by: Matthew Dobson, IBM Corporation

 *

 * Copyright (C) 2002, IBM Corp.

 *

 * All rights reserved.

 *

 * 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, GOOD TITLE or

 * NON INFRINGEMENT.  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., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 * Send feedback to <colpatch@us.ibm.com>

 */

#ifndef _LINUX_TOPOLOGY_H

#define _LINUX_TOPOLOGY_H

#include <linux/cpumask.h>

#include <linux/bitops.h>

#include <linux/mmzone.h>

#include <linux/smp.h>

#include <asm/topology.h>

#ifndef node_has_online_mem

#define node_has_online_mem(nid) (1)

#endif

#ifndef nr_cpus_node

#define nr_cpus_node(node)				\

	({						\

		node_to_cpumask_ptr(__tmp__, node);	\

		cpus_weight(*__tmp__);			\

	})

#endif

#define for_each_node_with_cpus(node)			\

	for_each_online_node(node)			\

		if (nr_cpus_node(node))

/* Conform to ACPI 2.0 SLIT distance definitions */

#define LOCAL_DISTANCE		10

#define REMOTE_DISTANCE		20

#ifndef node_distance

#define node_distance(from,to)	((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)

#endif

#ifndef RECLAIM_DISTANCE

/*

 * If the distance between nodes in a system is larger than RECLAIM_DISTANCE

 * (in whatever arch specific measurement units returned by node_distance())

 * then switch on zone reclaim on boot.

 */

#define RECLAIM_DISTANCE 20

#endif

#ifndef PENALTY_FOR_NODE_WITH_CPUS

#define PENALTY_FOR_NODE_WITH_CPUS	(1)

#endif

/*

 * Below are the 3 major initializers used in building sched_domains:

 * SD_SIBLING_INIT, for SMT domains

 * SD_CPU_INIT, for SMP domains

 * SD_NODE_INIT, for NUMA domains

 *

 * Any architecture that cares to do any tuning to these values should do so

 * by defining their own arch-specific initializer in include/asm/topology.h.

 * A definition there will automagically override these default initializers

 * and allow arch-specific performance tuning of sched_domains.

 * (Only non-zero and non-null fields need be specified.)

 */

#ifdef CONFIG_SCHED_SMT

/* MCD - Do we really need this?  It is always on if CONFIG_SCHED_SMT is,

 * so can't we drop this in favor of CONFIG_SCHED_SMT?

 */

#define ARCH_HAS_SCHED_WAKE_IDLE

/* Common values for SMT siblings */

#ifndef SD_SIBLING_INIT

#define SD_SIBLING_INIT (struct sched_domain) {		\

	.min_interval		= 1,			\

	.max_interval		= 2,			\

	.busy_factor		= 64,			\

	.imbalance_pct		= 110,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_NEWIDLE	\

				| SD_BALANCE_FORK	\

				| SD_BALANCE_EXEC	\

				| SD_WAKE_AFFINE	\

				| SD_WAKE_BALANCE	\

				| SD_SHARE_CPUPOWER,	\

	.last_balance		= jiffies,		\

	.balance_interval	= 1,			\

}

#endif

#endif /* CONFIG_SCHED_SMT */

#ifdef CONFIG_SCHED_MC

/* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */

#ifndef SD_MC_INIT

#define SD_MC_INIT (struct sched_domain) {		\

	.min_interval		= 1,			\

	.max_interval		= 4,			\

	.busy_factor		= 64,			\

	.imbalance_pct		= 125,			\

	.cache_nice_tries	= 1,			\

	.busy_idx		= 2,			\

	.wake_idx		= 1,			\

	.forkexec_idx		= 1,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_FORK	\

				| SD_BALANCE_EXEC	\

				| SD_WAKE_AFFINE	\

				| SD_WAKE_BALANCE	\

				| SD_SHARE_PKG_RESOURCES\

	.last_balance		= jiffies,		\

	.balance_interval	= 1,			\

}

#endif

#endif /* CONFIG_SCHED_MC */

/* Common values for CPUs */

#ifndef SD_CPU_INIT

#define SD_CPU_INIT (struct sched_domain) {		\

	.min_interval		= 1,			\

	.max_interval		= 4,			\

	.busy_factor		= 64,			\

	.imbalance_pct		= 125,			\

	.cache_nice_tries	= 1,			\

	.busy_idx		= 2,			\

	.idle_idx		= 1,			\

	.newidle_idx		= 2,			\

	.wake_idx		= 1,			\

	.forkexec_idx		= 1,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_EXEC	\

				| SD_BALANCE_FORK	\

				| SD_WAKE_AFFINE	\

				| SD_WAKE_BALANCE	\

	.last_balance		= jiffies,		\

	.balance_interval	= 1,			\

}

#endif

/* sched_domains SD_ALLNODES_INIT for NUMA machines */

#define SD_ALLNODES_INIT (struct sched_domain) {	\

	.min_interval		= 64,			\

	.max_interval		= 64*num_online_cpus(),	\

	.busy_factor		= 128,			\

	.imbalance_pct		= 133,			\

	.cache_nice_tries	= 1,			\

	.busy_idx		= 3,			\

	.idle_idx		= 3,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_NEWIDLE	\

				| SD_WAKE_AFFINE	\

				| SD_SERIALIZE,		\

	.last_balance		= jiffies,		\

	.balance_interval	= 64,			\

}

#ifdef CONFIG_NUMA

#ifndef SD_NODE_INIT

#error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!!

#endif

#endif /* CONFIG_NUMA */

#ifndef topology_physical_package_id

#define topology_physical_package_id(cpu)	((void)(cpu), -1)

#endif

#ifndef topology_core_id

#define topology_core_id(cpu)			((void)(cpu), 0)

#endif

#ifndef topology_thread_siblings

#define topology_thread_siblings(cpu)		cpumask_of_cpu(cpu)

#endif

#ifndef topology_core_siblings

#define topology_core_siblings(cpu)		cpumask_of_cpu(cpu)

#endif

#endif /* _LINUX_TOPOLOGY_H */