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
29 * to preserve the visibility of NUMA_NO_NODE definition,
30 * moved to there from here. May be used independent of
33 #include <linux/numa.h>
36 #include <linux/cpumask.h>
38 #include <asm/mpspec.h>
40 /* Mappings between logical cpu number and node number */
41 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map
);
43 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
45 * override generic percpu implementation of cpu_to_node
47 extern int __cpu_to_node(int cpu
);
48 #define cpu_to_node __cpu_to_node
50 extern int early_cpu_to_node(int cpu
);
52 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */
54 /* Same function but used if called before per_cpu areas are setup */
55 static inline int early_cpu_to_node(int cpu
)
57 return early_per_cpu(x86_cpu_to_node_map
, cpu
);
60 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
62 /* Mappings between node number and cpus on that node. */
63 extern cpumask_var_t node_to_cpumask_map
[MAX_NUMNODES
];
65 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
66 extern const struct cpumask
*cpumask_of_node(int node
);
68 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
69 static inline const struct cpumask
*cpumask_of_node(int node
)
71 return node_to_cpumask_map
[node
];
75 extern void setup_node_to_cpumask_map(void);
78 * Returns the number of the node containing Node 'node'. This
79 * architecture is flat, so it is a pretty simple function!
81 #define parent_node(node) (node)
83 #define pcibus_to_node(bus) __pcibus_to_node(bus)
85 extern int __node_distance(int, int);
86 #define node_distance(a, b) __node_distance(a, b)
88 #else /* !CONFIG_NUMA */
90 static inline int numa_node_id(void)
97 #define numa_node_id numa_node_id
99 static inline int early_cpu_to_node(int cpu
)
104 static inline void setup_node_to_cpumask_map(void) { }
108 #include <asm-generic/topology.h>
110 extern const struct cpumask
*cpu_coregroup_mask(int cpu
);
112 #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id)
113 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
114 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
117 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
118 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
120 extern unsigned int __max_logical_packages
;
121 #define topology_max_packages() (__max_logical_packages)
123 extern int __max_smt_threads
;
125 static inline int topology_max_smt_threads(void)
127 return __max_smt_threads
;
130 int topology_update_package_map(unsigned int apicid
, unsigned int cpu
);
131 extern int topology_phys_to_logical_pkg(unsigned int pkg
);
133 #define topology_max_packages() (1)
135 topology_update_package_map(unsigned int apicid
, unsigned int cpu
) { return 0; }
136 static inline int topology_phys_to_logical_pkg(unsigned int pkg
) { return 0; }
137 static inline int topology_max_smt_threads(void) { return 1; }
140 static inline void arch_fix_phys_package_id(int num
, u32 slot
)
145 int x86_pci_root_bus_node(int bus
);
146 void x86_pci_root_bus_resources(int bus
, struct list_head
*resources
);
148 #endif /* _ASM_X86_TOPOLOGY_H */