topology.h

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/*
 * 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 a bitmask of CPUs on Node 'node'.
 */
#define cpumask_of_node(node) ((node) == -1 ?               \
                   cpu_all_mask :               \
                   &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)

/*
 * 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) {     \
    .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        = 0,            \
    .wake_idx       = 0,            \
    .forkexec_idx       = 0,            \
    .flags          = SD_LOAD_BALANCE   \
                | SD_BALANCE_NEWIDLE    \
                | SD_BALANCE_EXEC   \
                | SD_BALANCE_FORK   \
                | SD_WAKE_AFFINE,   \
    .last_balance       = jiffies,      \
    .balance_interval   = 1,            \
    .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_cpumask(cpu)      (&cpu_core_map[cpu])
#define topology_thread_cpumask(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 cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?        \
                 cpu_all_mask :             \
                 cpumask_of_node(pcibus_to_node(bus)))

#include <asm-generic/topology.h>

#endif /* _ASM_IA64_TOPOLOGY_H */