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/*
* 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 _ASM_X86_TOPOLOGY_H
#define _ASM_X86_TOPOLOGY_H
#ifdef CONFIG_NUMA
#include <linux/cpumask.h>
#include <asm/mpspec.h>
/* Mappings between logical cpu number and node number */
DECLARE_PER_CPU(u16, x86_cpu_to_node_map);
extern u16 __initdata x86_cpu_to_node_map_init[];
extern void *x86_cpu_to_node_map_early_ptr;
extern cpumask_t node_to_cpumask_map[];
#define NUMA_NO_NODE ((u16)(~0))
/* Returns the number of the node containing CPU 'cpu' */
static inline int cpu_to_node(int cpu)
{
u16 *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
if (cpu_to_node_map)
return cpu_to_node_map[cpu];
else if (per_cpu_offset(cpu))
return per_cpu(x86_cpu_to_node_map, cpu);
else
return NUMA_NO_NODE;
}
/*
* Returns the number of the node containing Node 'node'. This
* architecture is flat, so it is a pretty simple function!
*/
#define parent_node(node) (node)
/* Returns a bitmask of CPUs on Node 'node'. */
static inline cpumask_t node_to_cpumask(int node)
{
return node_to_cpumask_map[node];
}
/* Returns the number of the first CPU on Node 'node'. */
static inline int node_to_first_cpu(int node)
{
cpumask_t mask = node_to_cpumask(node);
return first_cpu(mask);
}
#define pcibus_to_node(bus) __pcibus_to_node(bus)
#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
#ifdef CONFIG_X86_32
extern unsigned long node_start_pfn[];
extern unsigned long node_end_pfn[];
extern unsigned long node_remap_size[];
#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
# ifdef CONFIG_X86_HT
# define ENABLE_TOPO_DEFINES
# endif
# define SD_CACHE_NICE_TRIES 1
# define SD_IDLE_IDX 1
# define SD_NEWIDLE_IDX 2
# define SD_FORKEXEC_IDX 0
#else
# ifdef CONFIG_SMP
# define ENABLE_TOPO_DEFINES
# endif
# define SD_CACHE_NICE_TRIES 2
# define SD_IDLE_IDX 2
# define SD_NEWIDLE_IDX 0
# define SD_FORKEXEC_IDX 1
#endif
/* sched_domains SD_NODE_INIT for NUMAQ machines */
#define SD_NODE_INIT (struct sched_domain) { \
.span = CPU_MASK_NONE, \
.parent = NULL, \
.child = NULL, \
.groups = NULL, \
.min_interval = 8, \
.max_interval = 32, \
.busy_factor = 32, \
.imbalance_pct = 125, \
.cache_nice_tries = SD_CACHE_NICE_TRIES, \
.busy_idx = 3, \
.idle_idx = SD_IDLE_IDX, \
.newidle_idx = SD_NEWIDLE_IDX, \
.wake_idx = 1, \
.forkexec_idx = SD_FORKEXEC_IDX, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_EXEC \
| SD_BALANCE_FORK \
| SD_SERIALIZE \
| SD_WAKE_BALANCE, \
.last_balance = jiffies, \
.balance_interval = 1, \
.nr_balance_failed = 0, \
}
#ifdef CONFIG_X86_64_ACPI_NUMA
extern int __node_distance(int, int);
#define node_distance(a, b) __node_distance(a, b)
#endif
#else /* CONFIG_NUMA */
#include <asm-generic/topology.h>
#endif
extern cpumask_t cpu_coregroup_map(int cpu);
#ifdef ENABLE_TOPO_DEFINES
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
#endif
#ifdef CONFIG_SMP
#define mc_capable() (boot_cpu_data.x86_max_cores > 1)
#define smt_capable() (smp_num_siblings > 1)
#endif
#endif
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