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
39 * to preserve the visibility of NUMA_NO_NODE definition,
40 * moved to there from here. May be used independent of
43 #include <linux/numa.h>
46 #include <linux/cpumask.h>
48 #include <asm/mpspec.h>
50 /* Mappings between logical cpu number and node number */
51 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map
);
53 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
55 * override generic percpu implementation of cpu_to_node
57 extern int __cpu_to_node(int cpu
);
58 #define cpu_to_node __cpu_to_node
60 extern int early_cpu_to_node(int cpu
);
62 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
64 /* Same function but used if called before per_cpu areas are setup */
65 static inline int early_cpu_to_node(int cpu
)
67 return early_per_cpu(x86_cpu_to_node_map
, cpu
);
70 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
72 /* Mappings between node number and cpus on that node. */
73 extern cpumask_var_t node_to_cpumask_map
[MAX_NUMNODES
];
75 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
76 extern const struct cpumask
*cpumask_of_node(int node
);
78 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
79 static inline const struct cpumask
*cpumask_of_node(int node
)
81 return node_to_cpumask_map
[node
];
85 extern void setup_node_to_cpumask_map(void);
88 * Returns the number of the node containing Node 'node'. This
89 * architecture is flat, so it is a pretty simple function!
91 #define parent_node(node) (node)
93 #define pcibus_to_node(bus) __pcibus_to_node(bus)
95 extern int __node_distance(int, int);
96 #define node_distance(a, b) __node_distance(a, b)
98 #else /* !CONFIG_NUMA */
100 static inline int numa_node_id(void)
107 #define numa_node_id numa_node_id
109 static inline int early_cpu_to_node(int cpu
)
114 static inline void setup_node_to_cpumask_map(void) { }
118 #include <asm-generic/topology.h>
120 extern const struct cpumask
*cpu_coregroup_mask(int cpu
);
122 #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id)
123 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
124 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
126 #ifdef ENABLE_TOPO_DEFINES
127 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
128 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
130 extern unsigned int __max_logical_packages
;
131 #define topology_max_packages() (__max_logical_packages)
132 int topology_update_package_map(unsigned int apicid
, unsigned int cpu
);
133 extern int topology_phys_to_logical_pkg(unsigned int pkg
);
135 #define topology_max_packages() (1)
137 topology_update_package_map(unsigned int apicid
, unsigned int cpu
) { return 0; }
138 static inline int topology_phys_to_logical_pkg(unsigned int pkg
) { return 0; }
141 static inline void arch_fix_phys_package_id(int num
, u32 slot
)
146 int x86_pci_root_bus_node(int bus
);
147 void x86_pci_root_bus_resources(int bus
, struct list_head
*resources
);
149 #endif /* _ASM_X86_TOPOLOGY_H */