/*
   * 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)							\
  	({									\
  		cpumask_t __tmp__;						\
  		__tmp__ = node_to_cpumask(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.
   */
  #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) {		\
  	.span			= CPU_MASK_NONE,	\
  	.parent			= NULL,			\

  	.child			= NULL,			\

  	.groups			= NULL,			\
  	.min_interval		= 1,			\
  	.max_interval		= 2,			\

  	.busy_factor		= 64,			\

  	.imbalance_pct		= 110,			\

  	.cache_nice_tries	= 0,			\

  	.busy_idx		= 0,			\
  	.idle_idx		= 0,			\

  	.newidle_idx		= 0,			\

  	.wake_idx		= 0,			\

  	.forkexec_idx		= 0,			\

  	.flags			= SD_LOAD_BALANCE	\
  				| SD_BALANCE_NEWIDLE	\
  				| SD_BALANCE_EXEC	\
  				| SD_WAKE_AFFINE	\
  				| SD_WAKE_IDLE		\
  				| SD_SHARE_CPUPOWER,	\
  	.last_balance		= jiffies,		\
  	.balance_interval	= 1,			\
  	.nr_balance_failed	= 0,			\
  }
  #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) {		\
  	.span			= CPU_MASK_NONE,	\
  	.parent			= NULL,			\
  	.child			= NULL,			\
  	.groups			= NULL,			\
  	.min_interval		= 1,			\
  	.max_interval		= 4,			\
  	.busy_factor		= 64,			\
  	.imbalance_pct		= 125,			\
  	.cache_nice_tries	= 1,			\

  	.busy_idx		= 2,			\

  	.idle_idx		= 0,			\
  	.newidle_idx		= 0,			\

  	.wake_idx		= 1,			\
  	.forkexec_idx		= 1,			\
  	.flags			= SD_LOAD_BALANCE	\
  				| SD_BALANCE_NEWIDLE	\
  				| SD_BALANCE_EXEC	\
  				| SD_WAKE_AFFINE	\

  				| SD_WAKE_IDLE		\

  				| SD_SHARE_PKG_RESOURCES\
  				| BALANCE_FOR_MC_POWER,	\
  	.last_balance		= jiffies,		\
  	.balance_interval	= 1,			\
  	.nr_balance_failed	= 0,			\
  }
  #endif
  #endif /* CONFIG_SCHED_MC */

  /* Common values for CPUs */
  #ifndef SD_CPU_INIT
  #define SD_CPU_INIT (struct sched_domain) {		\
  	.span			= CPU_MASK_NONE,	\
  	.parent			= NULL,			\

  	.child			= NULL,			\

  	.groups			= NULL,			\
  	.min_interval		= 1,			\
  	.max_interval		= 4,			\
  	.busy_factor		= 64,			\
  	.imbalance_pct		= 125,			\

  	.cache_nice_tries	= 1,			\

  	.busy_idx		= 2,			\

  	.idle_idx		= 0,			\
  	.newidle_idx		= 0,			\

  	.wake_idx		= 1,			\

  	.forkexec_idx		= 1,			\

  	.flags			= SD_LOAD_BALANCE	\
  				| SD_BALANCE_NEWIDLE	\
  				| SD_BALANCE_EXEC	\

  				| SD_WAKE_AFFINE	\

  				| SD_WAKE_IDLE		\

  				| BALANCE_FOR_PKG_POWER,\

  	.last_balance		= jiffies,		\
  	.balance_interval	= 1,			\
  	.nr_balance_failed	= 0,			\
  }
  #endif

  /* sched_domains SD_ALLNODES_INIT for NUMA machines */
  #define SD_ALLNODES_INIT (struct sched_domain) {	\
  	.span			= CPU_MASK_NONE,	\
  	.parent			= NULL,			\

  	.child			= NULL,			\

  	.groups			= NULL,			\
  	.min_interval		= 64,			\
  	.max_interval		= 64*num_online_cpus(),	\
  	.busy_factor		= 128,			\
  	.imbalance_pct		= 133,			\
  	.cache_hot_time		= (10*1000000),		\
  	.cache_nice_tries	= 1,			\
  	.busy_idx		= 3,			\
  	.idle_idx		= 3,			\
  	.newidle_idx		= 0, /* unused */	\
  	.wake_idx		= 0, /* unused */	\
  	.forkexec_idx		= 0, /* unused */	\

  	.flags			= SD_LOAD_BALANCE	\
  				| SD_SERIALIZE,	\

  	.last_balance		= jiffies,		\
  	.balance_interval	= 64,			\
  	.nr_balance_failed	= 0,			\
  }

  #ifdef CONFIG_NUMA
  #ifndef SD_NODE_INIT
  #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!!
  #endif
  #endif /* CONFIG_NUMA */
  
  #endif /* _LINUX_TOPOLOGY_H */