1 /*
2 * Written by: Matthew Dobson, IBM Corporation
3 *
4 * Copyright (C) 2002, IBM Corp.
5 *
6 * All rights reserved.
7 *
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.
12 *
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
17 * details.
18 *
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.
22 *
23 * Send feedback to <colpatch@us.ibm.com>
24 */
25 #ifndef _ASM_X86_TOPOLOGY_H
26 #define _ASM_X86_TOPOLOGY_H
27
28 #ifdef CONFIG_X86_32
29 # ifdef CONFIG_SMP
30 # define ENABLE_TOPO_DEFINES
31 # endif
32 #else
33 # ifdef CONFIG_SMP
34 # define ENABLE_TOPO_DEFINES
35 # endif
36 #endif
37
38 /*
39 * to preserve the visibility of NUMA_NO_NODE definition,
40 * moved to there from here. May be used independent of
41 * CONFIG_NUMA.
42 */
43 #include <linux/numa.h>
44
45 #ifdef CONFIG_NUMA
46 #include <linux/cpumask.h>
47
48 #include <asm/mpspec.h>
49
50 /* Mappings between logical cpu number and node number */
51 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
52
53 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
54 /*
55 * override generic percpu implementation of cpu_to_node
56 */
57 extern int __cpu_to_node(int cpu);
58 #define cpu_to_node __cpu_to_node
59
60 extern int early_cpu_to_node(int cpu);
61
62 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
63
64 /* Same function but used if called before per_cpu areas are setup */
early_cpu_to_node(int cpu)65 static inline int early_cpu_to_node(int cpu)
66 {
67 return early_per_cpu(x86_cpu_to_node_map, cpu);
68 }
69
70 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
71
72 /* Mappings between node number and cpus on that node. */
73 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
74
75 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
76 extern const struct cpumask *cpumask_of_node(int node);
77 #else
78 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
cpumask_of_node(int node)79 static inline const struct cpumask *cpumask_of_node(int node)
80 {
81 return node_to_cpumask_map[node];
82 }
83 #endif
84
85 extern void setup_node_to_cpumask_map(void);
86
87 /*
88 * Returns the number of the node containing Node 'node'. This
89 * architecture is flat, so it is a pretty simple function!
90 */
91 #define parent_node(node) (node)
92
93 #define pcibus_to_node(bus) __pcibus_to_node(bus)
94
95 extern int __node_distance(int, int);
96 #define node_distance(a, b) __node_distance(a, b)
97
98 #else /* !CONFIG_NUMA */
99
numa_node_id(void)100 static inline int numa_node_id(void)
101 {
102 return 0;
103 }
104 /*
105 * indicate override:
106 */
107 #define numa_node_id numa_node_id
108
early_cpu_to_node(int cpu)109 static inline int early_cpu_to_node(int cpu)
110 {
111 return 0;
112 }
113
setup_node_to_cpumask_map(void)114 static inline void setup_node_to_cpumask_map(void) { }
115
116 #endif
117
118 #include <asm-generic/topology.h>
119
120 extern const struct cpumask *cpu_coregroup_mask(int cpu);
121
122 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
123 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
124
125 #ifdef ENABLE_TOPO_DEFINES
126 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
127 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
128 #endif
129
arch_fix_phys_package_id(int num,u32 slot)130 static inline void arch_fix_phys_package_id(int num, u32 slot)
131 {
132 }
133
134 struct pci_bus;
135 int x86_pci_root_bus_node(int bus);
136 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
137
138 #endif /* _ASM_X86_TOPOLOGY_H */
139