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 logical cpu number and node number */
48 extern int cpu_to_node_map[];
50 /* Returns the number of the node containing CPU 'cpu' */
51 static inline int cpu_to_node(int cpu)
53 return cpu_to_node_map[cpu];
55 #define early_cpu_to_node(cpu) cpu_to_node(cpu)
57 #else /* CONFIG_X86_64 */
59 /* Mappings between logical cpu number and node number */
60 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
62 /* Returns the number of the current Node. */
63 DECLARE_PER_CPU(int, node_number);
64 #define numa_node_id() percpu_read(node_number)
66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
67 extern int cpu_to_node(int cpu);
68 extern int early_cpu_to_node(int cpu);
70 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
72 /* Returns the number of the node containing CPU 'cpu' */
73 static inline int cpu_to_node(int cpu)
75 return per_cpu(x86_cpu_to_node_map, cpu);
78 /* Same function but used if called before per_cpu areas are setup */
79 static inline int early_cpu_to_node(int cpu)
81 return early_per_cpu(x86_cpu_to_node_map, cpu);
84 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
86 #endif /* CONFIG_X86_64 */
88 /* Mappings between node number and cpus on that node. */
89 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
91 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
92 extern const struct cpumask *cpumask_of_node(int node);
94 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
95 static inline const struct cpumask *cpumask_of_node(int node)
97 return node_to_cpumask_map[node];
101 extern void setup_node_to_cpumask_map(void);
104 * Returns the number of the node containing Node 'node'. This
105 * architecture is flat, so it is a pretty simple function!
107 #define parent_node(node) (node)
109 #define pcibus_to_node(bus) __pcibus_to_node(bus)
112 extern unsigned long node_start_pfn[];
113 extern unsigned long node_end_pfn[];
114 extern unsigned long node_remap_size[];
115 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
117 # define SD_CACHE_NICE_TRIES 1
118 # define SD_IDLE_IDX 1
119 # define SD_NEWIDLE_IDX 2
120 # define SD_FORKEXEC_IDX 0
124 # define SD_CACHE_NICE_TRIES 2
125 # define SD_IDLE_IDX 2
126 # define SD_NEWIDLE_IDX 2
127 # define SD_FORKEXEC_IDX 1
131 /* sched_domains SD_NODE_INIT for NUMA machines */
132 #define SD_NODE_INIT (struct sched_domain) { \
134 .max_interval = 32, \
136 .imbalance_pct = 125, \
137 .cache_nice_tries = SD_CACHE_NICE_TRIES, \
139 .idle_idx = SD_IDLE_IDX, \
140 .newidle_idx = SD_NEWIDLE_IDX, \
142 .forkexec_idx = SD_FORKEXEC_IDX, \
143 .flags = SD_LOAD_BALANCE \
149 .last_balance = jiffies, \
150 .balance_interval = 1, \
153 #ifdef CONFIG_X86_64_ACPI_NUMA
154 extern int __node_distance(int, int);
155 #define node_distance(a, b) __node_distance(a, b)
158 #else /* !CONFIG_NUMA */
160 static inline int numa_node_id(void)
165 static inline int cpu_to_node(int cpu)
170 static inline int early_cpu_to_node(int cpu)
175 static inline const struct cpumask *cpumask_of_node(int node)
177 return cpu_online_mask;
180 static inline void setup_node_to_cpumask_map(void) { }
184 #include <asm-generic/topology.h>
186 extern const struct cpumask *cpu_coregroup_mask(int cpu);
188 #ifdef ENABLE_TOPO_DEFINES
189 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
190 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
191 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
192 #define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
194 /* indicates that pointers to the topology cpumask_t maps are valid */
195 #define arch_provides_topology_pointers yes
198 static inline void arch_fix_phys_package_id(int num, u32 slot)
203 void x86_pci_root_bus_res_quirks(struct pci_bus *b);
206 #define mc_capable() ((boot_cpu_data.x86_max_cores > 1) && \
207 (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
208 #define smt_capable() (smp_num_siblings > 1)
212 extern int get_mp_bus_to_node(int busnum);
213 extern void set_mp_bus_to_node(int busnum, int node);
215 static inline int get_mp_bus_to_node(int busnum)
219 static inline void set_mp_bus_to_node(int busnum, int node)
224 #endif /* _ASM_X86_TOPOLOGY_H */