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topology.h

/*
 * Copyright (C) 2002, Erich Focht, NEC
 *
 * 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.
 */
#ifndef _ASM_IA64_TOPOLOGY_H
#define _ASM_IA64_TOPOLOGY_H

#include <asm/acpi.h>
#include <asm/numa.h>
#include <asm/smp.h>

#ifdef CONFIG_NUMA

/* Nodes w/o CPUs are preferred for memory allocations, see build_zonelists */
#define PENALTY_FOR_NODE_WITH_CPUS 255

/*
 * Distance above which we begin to use zone reclaim
 */
#define RECLAIM_DISTANCE 15

/*
 * Returns the number of the node containing CPU 'cpu'
 */
#define cpu_to_node(cpu) (int)(cpu_to_node_map[cpu])

/*
 * Returns a bitmask of CPUs on Node 'node'.
 */
#define node_to_cpumask(node) (node_to_cpu_mask[node])

/*
 * Returns the number of the node containing Node 'nid'.
 * Not implemented here. Multi-level hierarchies detected with
 * the help of node_distance().
 */
#define parent_node(nid) (nid)

/*
 * Returns the number of the first CPU on Node 'node'.
 */
#define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))

/*
 * Determines the node for a given pci bus
 */
#define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node

void build_cpu_to_node_map(void);

#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 = 2,              \
      .busy_idx         = 2,              \
      .idle_idx         = 1,              \
      .newidle_idx            = 2,              \
      .wake_idx         = 1,              \
      .forkexec_idx           = 1,              \
      .flags                  = SD_LOAD_BALANCE \
                        | SD_BALANCE_NEWIDLE    \
                        | SD_BALANCE_EXEC \
                        | SD_WAKE_AFFINE, \
      .last_balance           = jiffies,        \
      .balance_interval = 1,              \
      .nr_balance_failed      = 0,              \
}

/* sched_domains SD_NODE_INIT for IA64 NUMA machines */
#define SD_NODE_INIT (struct sched_domain) {          \
      .span             = CPU_MASK_NONE,  \
      .parent                 = NULL,                 \
      .child                  = NULL,                 \
      .groups                 = NULL,                 \
      .min_interval           = 8,              \
      .max_interval           = 8*(min(num_online_cpus(), 32)), \
      .busy_factor            = 64,             \
      .imbalance_pct          = 125,                  \
      .cache_nice_tries = 2,              \
      .busy_idx         = 3,              \
      .idle_idx         = 2,              \
      .newidle_idx            = 2,              \
      .wake_idx         = 1,              \
      .forkexec_idx           = 1,              \
      .flags                  = SD_LOAD_BALANCE \
                        | SD_BALANCE_EXEC \
                        | SD_BALANCE_FORK \
                        | SD_SERIALIZE          \
                        | SD_WAKE_BALANCE,      \
      .last_balance           = jiffies,        \
      .balance_interval = 64,             \
      .nr_balance_failed      = 0,              \
}

#endif /* CONFIG_NUMA */

#ifdef CONFIG_SMP
#define topology_physical_package_id(cpu) (cpu_data(cpu)->socket_id)
#define topology_core_id(cpu)             (cpu_data(cpu)->core_id)
#define topology_core_siblings(cpu)       (cpu_core_map[cpu])
#define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
#define smt_capable()                     (smp_num_siblings > 1)
#endif

extern void arch_fix_phys_package_id(int num, u32 slot);

#define pcibus_to_cpumask(bus)      (pcibus_to_node(bus) == -1 ? \
                              CPU_MASK_ALL : \
                              node_to_cpumask(pcibus_to_node(bus)) \
                        )

#include <asm-generic/topology.h>

#endif /* _ASM_IA64_TOPOLOGY_H */

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