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_X86_HT
30 # define ENABLE_TOPO_DEFINES
31 # endif
32 #else
33 # ifdef CONFIG_SMP
34 # define ENABLE_TOPO_DEFINES
35 # endif
36 #endif
37
38 #ifdef CONFIG_NUMA
39 #include <linux/cpumask.h>
40 #include <asm/mpspec.h>
41
42 /* Mappings between logical cpu number and node number */
43 #ifdef CONFIG_X86_32
44 extern int cpu_to_node_map[];
45
46 #else
47 DECLARE_PER_CPU(int, x86_cpu_to_node_map);
48 extern int x86_cpu_to_node_map_init[];
49 extern void *x86_cpu_to_node_map_early_ptr;
50 /* Returns the number of the current Node. */
51 #define numa_node_id() (early_cpu_to_node(raw_smp_processor_id()))
52 #endif
53
54 extern cpumask_t node_to_cpumask_map[];
55
56 #define NUMA_NO_NODE (-1)
57
58 /* Returns the number of the node containing CPU 'cpu' */
59 #ifdef CONFIG_X86_32
60 #define early_cpu_to_node(cpu) cpu_to_node(cpu)
61 static inline int cpu_to_node(int cpu)
62 {
63 return cpu_to_node_map[cpu];
64 }
65
66 #else /* CONFIG_X86_64 */
67 static inline int early_cpu_to_node(int cpu)
68 {
69 int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
70
71 if (cpu_to_node_map)
72 return cpu_to_node_map[cpu];
73 else if (per_cpu_offset(cpu))
74 return per_cpu(x86_cpu_to_node_map, cpu);
75 else
76 return NUMA_NO_NODE;
77 }
78
79 static inline int cpu_to_node(int cpu)
80 {
81 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
82 if (x86_cpu_to_node_map_early_ptr) {
83 printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n",
84 (int)cpu);
85 dump_stack();
86 return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
87 }
88 #endif
89 if (per_cpu_offset(cpu))
90 return per_cpu(x86_cpu_to_node_map, cpu);
91 else
92 return NUMA_NO_NODE;
93 }
94 #endif /* CONFIG_X86_64 */
95
96 /*
97 * Returns the number of the node containing Node 'node'. This
98 * architecture is flat, so it is a pretty simple function!
99 */
100 #define parent_node(node) (node)
101
102 /* Returns a bitmask of CPUs on Node 'node'. */
103 static inline cpumask_t node_to_cpumask(int node)
104 {
105 return node_to_cpumask_map[node];
106 }
107
108 /* Returns the number of the first CPU on Node 'node'. */
109 static inline int node_to_first_cpu(int node)
110 {
111 cpumask_t mask = node_to_cpumask(node);
112
113 return first_cpu(mask);
114 }
115
116 #define pcibus_to_node(bus) __pcibus_to_node(bus)
117 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
118
119 #ifdef CONFIG_X86_32
120 extern unsigned long node_start_pfn[];
121 extern unsigned long node_end_pfn[];
122 extern unsigned long node_remap_size[];
123 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
124
125 # define SD_CACHE_NICE_TRIES 1
126 # define SD_IDLE_IDX 1
127 # define SD_NEWIDLE_IDX 2
128 # define SD_FORKEXEC_IDX 0
129
130 #else
131
132 # define SD_CACHE_NICE_TRIES 2
133 # define SD_IDLE_IDX 2
134 # define SD_NEWIDLE_IDX 0
135 # define SD_FORKEXEC_IDX 1
136
137 #endif
138
139 /* sched_domains SD_NODE_INIT for NUMAQ machines */
140 #define SD_NODE_INIT (struct sched_domain) { \
141 .span = CPU_MASK_NONE, \
142 .parent = NULL, \
143 .child = NULL, \
144 .groups = NULL, \
145 .min_interval = 8, \
146 .max_interval = 32, \
147 .busy_factor = 32, \
148 .imbalance_pct = 125, \
149 .cache_nice_tries = SD_CACHE_NICE_TRIES, \
150 .busy_idx = 3, \
151 .idle_idx = SD_IDLE_IDX, \
152 .newidle_idx = SD_NEWIDLE_IDX, \
153 .wake_idx = 1, \
154 .forkexec_idx = SD_FORKEXEC_IDX, \
155 .flags = SD_LOAD_BALANCE \
156 | SD_BALANCE_EXEC \
157 | SD_BALANCE_FORK \
158 | SD_SERIALIZE \
159 | SD_WAKE_BALANCE, \
160 .last_balance = jiffies, \
161 .balance_interval = 1, \
162 .nr_balance_failed = 0, \
163 }
164
165 #ifdef CONFIG_X86_64_ACPI_NUMA
166 extern int __node_distance(int, int);
167 #define node_distance(a, b) __node_distance(a, b)
168 #endif
169
170 #else /* CONFIG_NUMA */
171
172 #include <asm-generic/topology.h>
173
174 #endif
175
176 extern cpumask_t cpu_coregroup_map(int cpu);
177
178 #ifdef ENABLE_TOPO_DEFINES
179 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
180 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
181 #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
182 #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
183 #endif
184
185 #ifdef CONFIG_SMP
186 #define mc_capable() (boot_cpu_data.x86_max_cores > 1)
187 #define smt_capable() (smp_num_siblings > 1)
188 #endif
189
190 #endif
191
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