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 cpumask_t node_to_cpumask(int node)
63 return node_to_cpumask_map[node];
66 #else /* CONFIG_X86_64 */
68 /* Mappings between node number and cpus on that node. */
69 extern cpumask_t *node_to_cpumask_map;
71 /* Mappings between logical cpu number and node number */
72 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
74 /* Returns the number of the current Node. */
75 #define numa_node_id() read_pda(nodenumber)
77 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
78 extern int cpu_to_node(int cpu);
79 extern int early_cpu_to_node(int cpu);
80 extern cpumask_t *_node_to_cpumask_ptr(int node);
81 extern cpumask_t node_to_cpumask(int node);
83 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
85 /* Returns the number of the node containing CPU 'cpu' */
86 static inline int cpu_to_node(int cpu)
88 return per_cpu(x86_cpu_to_node_map, cpu);
91 /* Same function but used if called before per_cpu areas are setup */
92 static inline int early_cpu_to_node(int cpu)
94 if (early_per_cpu_ptr(x86_cpu_to_node_map))
95 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
97 return per_cpu(x86_cpu_to_node_map, cpu);
100 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
101 static inline cpumask_t *_node_to_cpumask_ptr(int node)
103 return &node_to_cpumask_map[node];
106 /* Returns a bitmask of CPUs on Node 'node'. */
107 static inline cpumask_t node_to_cpumask(int node)
109 return node_to_cpumask_map[node];
112 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
114 /* Replace default node_to_cpumask_ptr with optimized version */
115 #define node_to_cpumask_ptr(v, node) \
116 cpumask_t *v = _node_to_cpumask_ptr(node)
118 #define node_to_cpumask_ptr_next(v, node) \
119 v = _node_to_cpumask_ptr(node)
121 #endif /* CONFIG_X86_64 */
124 * Returns the number of the node containing Node 'node'. This
125 * architecture is flat, so it is a pretty simple function!
127 #define parent_node(node) (node)
129 #define pcibus_to_node(bus) __pcibus_to_node(bus)
130 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
133 extern unsigned long node_start_pfn[];
134 extern unsigned long node_end_pfn[];
135 extern unsigned long node_remap_size[];
136 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
138 # define SD_CACHE_NICE_TRIES 1
139 # define SD_IDLE_IDX 1
140 # define SD_NEWIDLE_IDX 2
141 # define SD_FORKEXEC_IDX 0
145 # define SD_CACHE_NICE_TRIES 2
146 # define SD_IDLE_IDX 2
147 # define SD_NEWIDLE_IDX 2
148 # define SD_FORKEXEC_IDX 1
152 /* sched_domains SD_NODE_INIT for NUMAQ machines */
153 #define SD_NODE_INIT (struct sched_domain) { \
155 .max_interval = 32, \
157 .imbalance_pct = 125, \
158 .cache_nice_tries = SD_CACHE_NICE_TRIES, \
160 .idle_idx = SD_IDLE_IDX, \
161 .newidle_idx = SD_NEWIDLE_IDX, \
163 .forkexec_idx = SD_FORKEXEC_IDX, \
164 .flags = SD_LOAD_BALANCE \
169 .last_balance = jiffies, \
170 .balance_interval = 1, \
173 #ifdef CONFIG_X86_64_ACPI_NUMA
174 extern int __node_distance(int, int);
175 #define node_distance(a, b) __node_distance(a, b)
178 #else /* !CONFIG_NUMA */
180 #define numa_node_id() 0
181 #define cpu_to_node(cpu) 0
182 #define early_cpu_to_node(cpu) 0
184 static inline cpumask_t *_node_to_cpumask_ptr(int node)
186 return &cpu_online_map;
188 static inline cpumask_t node_to_cpumask(int node)
190 return cpu_online_map;
192 static inline int node_to_first_cpu(int node)
194 return first_cpu(cpu_online_map);
197 /* Replace default node_to_cpumask_ptr with optimized version */
198 #define node_to_cpumask_ptr(v, node) \
199 cpumask_t *v = _node_to_cpumask_ptr(node)
201 #define node_to_cpumask_ptr_next(v, node) \
202 v = _node_to_cpumask_ptr(node)
205 #include <asm-generic/topology.h>
208 /* Returns the number of the first CPU on Node 'node'. */
209 static inline int node_to_first_cpu(int node)
211 node_to_cpumask_ptr(mask, node);
212 return first_cpu(*mask);
216 extern cpumask_t cpu_coregroup_map(int cpu);
218 #ifdef ENABLE_TOPO_DEFINES
219 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
220 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
221 #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
222 #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
224 /* indicates that pointers to the topology cpumask_t maps are valid */
225 #define arch_provides_topology_pointers yes
228 static inline void arch_fix_phys_package_id(int num, u32 slot)
233 void set_pci_bus_resources_arch_default(struct pci_bus *b);
236 #define mc_capable() (boot_cpu_data.x86_max_cores > 1)
237 #define smt_capable() (smp_num_siblings > 1)
241 extern int get_mp_bus_to_node(int busnum);
242 extern void set_mp_bus_to_node(int busnum, int node);
244 static inline int get_mp_bus_to_node(int busnum)
248 static inline void set_mp_bus_to_node(int busnum, int node)
253 #endif /* _ASM_X86_TOPOLOGY_H */