2 * Written by: Matthew Dobson, IBM Corporation
4 * Copyright (C) 2002, IBM Corp.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
16 * NON INFRINGEMENT. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Send feedback to <colpatch@us.ibm.com>
25 #ifndef _ASM_X86_TOPOLOGY_H
26 #define _ASM_X86_TOPOLOGY_H
30 # define ENABLE_TOPO_DEFINES
34 # define ENABLE_TOPO_DEFINES
38 /* Node not present */
39 #define NUMA_NO_NODE (-1)
42 #include <linux/cpumask.h>
43 #include <asm/mpspec.h>
47 /* Mappings between node number and cpus on that node. */
48 extern cpumask_t node_to_cpumask_map[];
50 /* Mappings between logical cpu number and node number */
51 extern int cpu_to_node_map[];
53 /* Returns the number of the node containing CPU 'cpu' */
54 static inline int cpu_to_node(int cpu)
56 return cpu_to_node_map[cpu];
58 #define early_cpu_to_node(cpu) cpu_to_node(cpu)
60 /* Returns a bitmask of CPUs on Node 'node'. */
61 static inline const struct cpumask *cpumask_of_node(int node)
63 return &node_to_cpumask_map[node];
66 static inline void setup_node_to_cpumask_map(void) { }
68 #else /* CONFIG_X86_64 */
70 /* Mappings between node number and cpus on that node. */
71 extern cpumask_t *node_to_cpumask_map;
73 /* Mappings between logical cpu number and node number */
74 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
76 /* Returns the number of the current Node. */
77 DECLARE_PER_CPU(int, node_number);
78 #define numa_node_id() percpu_read(node_number)
80 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
81 extern int cpu_to_node(int cpu);
82 extern int early_cpu_to_node(int cpu);
83 extern const cpumask_t *cpumask_of_node(int node);
85 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
87 /* Returns the number of the node containing CPU 'cpu' */
88 static inline int cpu_to_node(int cpu)
90 return per_cpu(x86_cpu_to_node_map, cpu);
93 /* Same function but used if called before per_cpu areas are setup */
94 static inline int early_cpu_to_node(int cpu)
96 return early_per_cpu(x86_cpu_to_node_map, cpu);
99 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
100 static inline const cpumask_t *cpumask_of_node(int node)
102 return &node_to_cpumask_map[node];
105 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
107 extern void setup_node_to_cpumask_map(void);
109 #endif /* CONFIG_X86_64 */
112 * Returns the number of the node containing Node 'node'. This
113 * architecture is flat, so it is a pretty simple function!
115 #define parent_node(node) (node)
117 #define pcibus_to_node(bus) __pcibus_to_node(bus)
120 extern unsigned long node_start_pfn[];
121 extern unsigned long node_end_pfn[];
122 extern unsigned long node_remap_size[];
123 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
125 # define SD_CACHE_NICE_TRIES 1
126 # define SD_IDLE_IDX 1
127 # define SD_NEWIDLE_IDX 2
128 # define SD_FORKEXEC_IDX 0
132 # define SD_CACHE_NICE_TRIES 2
133 # define SD_IDLE_IDX 2
134 # define SD_NEWIDLE_IDX 2
135 # define SD_FORKEXEC_IDX 1
139 /* sched_domains SD_NODE_INIT for NUMA machines */
140 #define SD_NODE_INIT (struct sched_domain) { \
142 .max_interval = 32, \
144 .imbalance_pct = 125, \
145 .cache_nice_tries = SD_CACHE_NICE_TRIES, \
147 .idle_idx = SD_IDLE_IDX, \
148 .newidle_idx = SD_NEWIDLE_IDX, \
150 .forkexec_idx = SD_FORKEXEC_IDX, \
151 .flags = SD_LOAD_BALANCE \
157 .last_balance = jiffies, \
158 .balance_interval = 1, \
161 #ifdef CONFIG_X86_64_ACPI_NUMA
162 extern int __node_distance(int, int);
163 #define node_distance(a, b) __node_distance(a, b)
166 #else /* !CONFIG_NUMA */
168 static inline int numa_node_id(void)
173 static inline int cpu_to_node(int cpu)
178 static inline int early_cpu_to_node(int cpu)
183 static inline const cpumask_t *cpumask_of_node(int node)
185 return &cpu_online_map;
187 static inline int node_to_first_cpu(int node)
189 return first_cpu(cpu_online_map);
192 static inline void setup_node_to_cpumask_map(void) { }
196 #include <asm-generic/topology.h>
199 /* Returns the number of the first CPU on Node 'node'. */
200 static inline int node_to_first_cpu(int node)
202 return cpumask_first(cpumask_of_node(node));
206 extern const struct cpumask *cpu_coregroup_mask(int cpu);
208 #ifdef ENABLE_TOPO_DEFINES
209 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
210 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
211 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
212 #define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
214 /* indicates that pointers to the topology cpumask_t maps are valid */
215 #define arch_provides_topology_pointers yes
218 static inline void arch_fix_phys_package_id(int num, u32 slot)
223 void set_pci_bus_resources_arch_default(struct pci_bus *b);
226 #define mc_capable() (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids)
227 #define smt_capable() (smp_num_siblings > 1)
231 extern int get_mp_bus_to_node(int busnum);
232 extern void set_mp_bus_to_node(int busnum, int node);
234 static inline int get_mp_bus_to_node(int busnum)
238 static inline void set_mp_bus_to_node(int busnum, int node)
243 #endif /* _ASM_X86_TOPOLOGY_H */