include/asm-x86/topology.h - linux - Git at Google

 /*
  * 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_X86_32
 # ifdef CONFIG_X86_HT
 #  define ENABLE_TOPO_DEFINES
 # endif
 #else
 # ifdef CONFIG_SMP
 #  define ENABLE_TOPO_DEFINES
 # endif
 #endif

 /* Node not present */
 #define NUMA_NO_NODE	(-1)

 #ifdef CONFIG_NUMA
 #include <linux/cpumask.h>
 #include <asm/mpspec.h>

 #ifdef CONFIG_X86_32

 /* Mappings between node number and cpus on that node. */
 extern cpumask_t node_to_cpumask_map[];

 /* Mappings between logical cpu number and node number */
 extern int cpu_to_node_map[];

 /* Returns the number of the node containing CPU 'cpu' */
 static inline int cpu_to_node(int cpu)
 {
 	return cpu_to_node_map[cpu];
 }
 #define early_cpu_to_node(cpu)	cpu_to_node(cpu)

 /* Returns a bitmask of CPUs on Node 'node'.
  *
  * Side note: this function creates the returned cpumask on the stack
  * so with a high NR_CPUS count, excessive stack space is used.  The
  * node_to_cpumask_ptr function should be used whenever possible.
  */
 static inline cpumask_t node_to_cpumask(int node)
 {
 	return node_to_cpumask_map[node];
 }

 #else /* CONFIG_X86_64 */

 /* Mappings between node number and cpus on that node. */
 extern cpumask_t *node_to_cpumask_map;

 /* Mappings between logical cpu number and node number */
 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);

 /* Returns the number of the current Node. */
 #define numa_node_id()		read_pda(nodenumber)

 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
 extern int cpu_to_node(int cpu);
 extern int early_cpu_to_node(int cpu);
 extern const cpumask_t *_node_to_cpumask_ptr(int node);
 extern cpumask_t node_to_cpumask(int node);

 #else	/* !CONFIG_DEBUG_PER_CPU_MAPS */

 /* Returns the number of the node containing CPU 'cpu' */
 static inline int cpu_to_node(int cpu)
 {
 	return per_cpu(x86_cpu_to_node_map, cpu);
 }

 /* Same function but used if called before per_cpu areas are setup */
 static inline int early_cpu_to_node(int cpu)
 {
 	if (early_per_cpu_ptr(x86_cpu_to_node_map))
 		return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];

 	return per_cpu(x86_cpu_to_node_map, cpu);
 }

 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
 static inline const cpumask_t *_node_to_cpumask_ptr(int node)
 {
 	return &node_to_cpumask_map[node];
 }

 /* Returns a bitmask of CPUs on Node 'node'. */
 static inline cpumask_t node_to_cpumask(int node)
 {
 	return node_to_cpumask_map[node];
 }

 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */

 /* Replace default node_to_cpumask_ptr with optimized version */
 #define node_to_cpumask_ptr(v, node)		\
 		const cpumask_t *v = _node_to_cpumask_ptr(node)

 #define node_to_cpumask_ptr_next(v, node)	\
 			   v = _node_to_cpumask_ptr(node)

 #endif /* CONFIG_X86_64 */

 /*
  * 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)

 #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])

 # define SD_CACHE_NICE_TRIES	1
 # define SD_IDLE_IDX		1
 # define SD_NEWIDLE_IDX		2
 # define SD_FORKEXEC_IDX	0

 #else

 # define SD_CACHE_NICE_TRIES	2
 # define SD_IDLE_IDX		2
 # define SD_NEWIDLE_IDX		2
 # define SD_FORKEXEC_IDX	1

 #endif

 /* sched_domains SD_NODE_INIT for NUMAQ machines */
 #define SD_NODE_INIT (struct sched_domain) {		\
 	.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,			\
 }

 #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 */

 #define numa_node_id()		0
 #define	cpu_to_node(cpu)	0
 #define	early_cpu_to_node(cpu)	0

 static inline const cpumask_t *_node_to_cpumask_ptr(int node)
 {
 	return &cpu_online_map;
 }
 static inline cpumask_t node_to_cpumask(int node)
 {
 	return cpu_online_map;
 }
 static inline int node_to_first_cpu(int node)
 {
 	return first_cpu(cpu_online_map);
 }

 /* Replace default node_to_cpumask_ptr with optimized version */
 #define node_to_cpumask_ptr(v, node)		\
 		const cpumask_t *v = _node_to_cpumask_ptr(node)

 #define node_to_cpumask_ptr_next(v, node)	\
 			   v = _node_to_cpumask_ptr(node)
 #endif

 #include <asm-generic/topology.h>

 #ifdef CONFIG_NUMA
 /* Returns the number of the first CPU on Node 'node'. */
 static inline int node_to_first_cpu(int node)
 {
 	node_to_cpumask_ptr(mask, node);
 	return first_cpu(*mask);
 }
 #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))

 /* indicates that pointers to the topology cpumask_t maps are valid */
 #define arch_provides_topology_pointers		yes
 #endif

 static inline void arch_fix_phys_package_id(int num, u32 slot)
 {
 }

 struct pci_bus;
 void set_pci_bus_resources_arch_default(struct pci_bus *b);

 #ifdef CONFIG_SMP
 #define mc_capable()			(boot_cpu_data.x86_max_cores > 1)
 #define smt_capable()			(smp_num_siblings > 1)
 #endif

 #ifdef CONFIG_NUMA
 extern int get_mp_bus_to_node(int busnum);
 extern void set_mp_bus_to_node(int busnum, int node);
 #else
 static inline int get_mp_bus_to_node(int busnum)
 {
 	return 0;
 }
 static inline void set_mp_bus_to_node(int busnum, int node)
 {
 }
 #endif

 #endif /* _ASM_X86_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 _ASM_X86_TOPOLOGY_H
	#define _ASM_X86_TOPOLOGY_H

	#ifdef CONFIG_X86_32
	# ifdef CONFIG_X86_HT
	# define ENABLE_TOPO_DEFINES
	# endif
	#else
	# ifdef CONFIG_SMP
	# define ENABLE_TOPO_DEFINES
	# endif
	#endif

	/* Node not present */
	#define NUMA_NO_NODE (-1)

	#ifdef CONFIG_NUMA
	#include <linux/cpumask.h>
	#include <asm/mpspec.h>

	#ifdef CONFIG_X86_32

	/* Mappings between node number and cpus on that node. */
	extern cpumask_t node_to_cpumask_map[];

	/* Mappings between logical cpu number and node number */
	extern int cpu_to_node_map[];

	/* Returns the number of the node containing CPU 'cpu' */
	static inline int cpu_to_node(int cpu)
	{
	return cpu_to_node_map[cpu];
	}
	#define early_cpu_to_node(cpu) cpu_to_node(cpu)

	/* Returns a bitmask of CPUs on Node 'node'.
	*
	* Side note: this function creates the returned cpumask on the stack
	* so with a high NR_CPUS count, excessive stack space is used. The
	* node_to_cpumask_ptr function should be used whenever possible.
	*/
	static inline cpumask_t node_to_cpumask(int node)
	{
	return node_to_cpumask_map[node];
	}

	#else /* CONFIG_X86_64 */

	/* Mappings between node number and cpus on that node. */
	extern cpumask_t *node_to_cpumask_map;

	/* Mappings between logical cpu number and node number */
	DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);

	/* Returns the number of the current Node. */
	#define numa_node_id() read_pda(nodenumber)

	#ifdef CONFIG_DEBUG_PER_CPU_MAPS
	extern int cpu_to_node(int cpu);
	extern int early_cpu_to_node(int cpu);
	extern const cpumask_t *_node_to_cpumask_ptr(int node);
	extern cpumask_t node_to_cpumask(int node);

	#else /* !CONFIG_DEBUG_PER_CPU_MAPS */

	/* Returns the number of the node containing CPU 'cpu' */
	static inline int cpu_to_node(int cpu)
	{
	return per_cpu(x86_cpu_to_node_map, cpu);
	}

	/* Same function but used if called before per_cpu areas are setup */
	static inline int early_cpu_to_node(int cpu)
	{
	if (early_per_cpu_ptr(x86_cpu_to_node_map))
	return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];

	return per_cpu(x86_cpu_to_node_map, cpu);
	}

	/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
	static inline const cpumask_t *_node_to_cpumask_ptr(int node)
	{
	return &node_to_cpumask_map[node];
	}

	/* Returns a bitmask of CPUs on Node 'node'. */
	static inline cpumask_t node_to_cpumask(int node)
	{
	return node_to_cpumask_map[node];
	}

	#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */

	/* Replace default node_to_cpumask_ptr with optimized version */
	#define node_to_cpumask_ptr(v, node) \
	const cpumask_t *v = _node_to_cpumask_ptr(node)

	#define node_to_cpumask_ptr_next(v, node) \
	v = _node_to_cpumask_ptr(node)

	#endif /* CONFIG_X86_64 */

	/*
	* 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)

	#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])

	# define SD_CACHE_NICE_TRIES 1
	# define SD_IDLE_IDX 1
	# define SD_NEWIDLE_IDX 2
	# define SD_FORKEXEC_IDX 0

	#else

	# define SD_CACHE_NICE_TRIES 2
	# define SD_IDLE_IDX 2
	# define SD_NEWIDLE_IDX 2
	# define SD_FORKEXEC_IDX 1

	#endif

	/* sched_domains SD_NODE_INIT for NUMAQ machines */
	#define SD_NODE_INIT (struct sched_domain) { \
	.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, \
	}

	#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 */

	#define numa_node_id() 0
	#define cpu_to_node(cpu) 0
	#define early_cpu_to_node(cpu) 0

	static inline const cpumask_t *_node_to_cpumask_ptr(int node)
	{
	return &cpu_online_map;
	}
	static inline cpumask_t node_to_cpumask(int node)
	{
	return cpu_online_map;
	}
	static inline int node_to_first_cpu(int node)
	{
	return first_cpu(cpu_online_map);
	}

	/* Replace default node_to_cpumask_ptr with optimized version */
	#define node_to_cpumask_ptr(v, node) \
	const cpumask_t *v = _node_to_cpumask_ptr(node)

	#define node_to_cpumask_ptr_next(v, node) \
	v = _node_to_cpumask_ptr(node)
	#endif

	#include <asm-generic/topology.h>

	#ifdef CONFIG_NUMA
	/* Returns the number of the first CPU on Node 'node'. */
	static inline int node_to_first_cpu(int node)
	{
	node_to_cpumask_ptr(mask, node);
	return first_cpu(*mask);
	}
	#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))

	/* indicates that pointers to the topology cpumask_t maps are valid */
	#define arch_provides_topology_pointers yes
	#endif

	static inline void arch_fix_phys_package_id(int num, u32 slot)
	{
	}

	struct pci_bus;
	void set_pci_bus_resources_arch_default(struct pci_bus *b);

	#ifdef CONFIG_SMP
	#define mc_capable() (boot_cpu_data.x86_max_cores > 1)
	#define smt_capable() (smp_num_siblings > 1)
	#endif

	#ifdef CONFIG_NUMA
	extern int get_mp_bus_to_node(int busnum);
	extern void set_mp_bus_to_node(int busnum, int node);
	#else
	static inline int get_mp_bus_to_node(int busnum)
	{
	return 0;
	}
	static inline void set_mp_bus_to_node(int busnum, int node)
	{
	}
	#endif

	#endif /* _ASM_X86_TOPOLOGY_H */