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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 | /* Node not present */ | |
39 | #define NUMA_NO_NODE (-1) | |
40 | ||
41 | #ifdef CONFIG_NUMA | |
42 | #include <linux/cpumask.h> | |
43 | #include <asm/mpspec.h> | |
44 | ||
45 | #ifdef CONFIG_X86_32 | |
46 | ||
47 | /* Mappings between node number and cpus on that node. */ | |
48 | extern cpumask_t node_to_cpumask_map[]; | |
49 | ||
50 | /* Mappings between logical cpu number and node number */ | |
51 | extern int cpu_to_node_map[]; | |
52 | ||
53 | /* Returns the number of the node containing CPU 'cpu' */ | |
54 | static inline int cpu_to_node(int cpu) | |
55 | { | |
56 | return cpu_to_node_map[cpu]; | |
57 | } | |
58 | #define early_cpu_to_node(cpu) cpu_to_node(cpu) | |
59 | ||
60 | /* Returns a bitmask of CPUs on Node 'node'. | |
61 | * | |
62 | * Side note: this function creates the returned cpumask on the stack | |
63 | * so with a high NR_CPUS count, excessive stack space is used. The | |
64 | * node_to_cpumask_ptr function should be used whenever possible. | |
65 | */ | |
66 | static inline cpumask_t node_to_cpumask(int node) | |
67 | { | |
68 | return node_to_cpumask_map[node]; | |
69 | } | |
70 | ||
71 | #else /* CONFIG_X86_64 */ | |
72 | ||
73 | /* Mappings between node number and cpus on that node. */ | |
74 | extern cpumask_t *node_to_cpumask_map; | |
75 | ||
76 | /* Mappings between logical cpu number and node number */ | |
77 | DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); | |
78 | ||
79 | /* Returns the number of the current Node. */ | |
80 | #define numa_node_id() read_pda(nodenumber) | |
81 | ||
82 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS | |
83 | extern int cpu_to_node(int cpu); | |
84 | extern int early_cpu_to_node(int cpu); | |
85 | extern const cpumask_t *_node_to_cpumask_ptr(int node); | |
86 | extern cpumask_t node_to_cpumask(int node); | |
87 | ||
88 | #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ | |
89 | ||
90 | /* Returns the number of the node containing CPU 'cpu' */ | |
91 | static inline int cpu_to_node(int cpu) | |
92 | { | |
93 | return per_cpu(x86_cpu_to_node_map, cpu); | |
94 | } | |
95 | ||
96 | /* Same function but used if called before per_cpu areas are setup */ | |
97 | static inline int early_cpu_to_node(int cpu) | |
98 | { | |
99 | if (early_per_cpu_ptr(x86_cpu_to_node_map)) | |
100 | return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; | |
101 | ||
102 | return per_cpu(x86_cpu_to_node_map, cpu); | |
103 | } | |
104 | ||
105 | /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ | |
106 | static inline const cpumask_t *_node_to_cpumask_ptr(int node) | |
107 | { | |
108 | return &node_to_cpumask_map[node]; | |
109 | } | |
110 | ||
111 | /* Returns a bitmask of CPUs on Node 'node'. */ | |
112 | static inline cpumask_t node_to_cpumask(int node) | |
113 | { | |
114 | return node_to_cpumask_map[node]; | |
115 | } | |
116 | ||
117 | #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ | |
118 | ||
119 | /* Replace default node_to_cpumask_ptr with optimized version */ | |
120 | #define node_to_cpumask_ptr(v, node) \ | |
121 | const cpumask_t *v = _node_to_cpumask_ptr(node) | |
122 | ||
123 | #define node_to_cpumask_ptr_next(v, node) \ | |
124 | v = _node_to_cpumask_ptr(node) | |
125 | ||
126 | #endif /* CONFIG_X86_64 */ | |
127 | ||
128 | /* | |
129 | * Returns the number of the node containing Node 'node'. This | |
130 | * architecture is flat, so it is a pretty simple function! | |
131 | */ | |
132 | #define parent_node(node) (node) | |
133 | ||
134 | #define pcibus_to_node(bus) __pcibus_to_node(bus) | |
135 | #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus) | |
136 | ||
137 | #ifdef CONFIG_X86_32 | |
138 | extern unsigned long node_start_pfn[]; | |
139 | extern unsigned long node_end_pfn[]; | |
140 | extern unsigned long node_remap_size[]; | |
141 | #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) | |
142 | ||
143 | # define SD_CACHE_NICE_TRIES 1 | |
144 | # define SD_IDLE_IDX 1 | |
145 | # define SD_NEWIDLE_IDX 2 | |
146 | # define SD_FORKEXEC_IDX 0 | |
147 | ||
148 | #else | |
149 | ||
150 | # define SD_CACHE_NICE_TRIES 2 | |
151 | # define SD_IDLE_IDX 2 | |
152 | # define SD_NEWIDLE_IDX 2 | |
153 | # define SD_FORKEXEC_IDX 1 | |
154 | ||
155 | #endif | |
156 | ||
157 | /* sched_domains SD_NODE_INIT for NUMAQ machines */ | |
158 | #define SD_NODE_INIT (struct sched_domain) { \ | |
159 | .min_interval = 8, \ | |
160 | .max_interval = 32, \ | |
161 | .busy_factor = 32, \ | |
162 | .imbalance_pct = 125, \ | |
163 | .cache_nice_tries = SD_CACHE_NICE_TRIES, \ | |
164 | .busy_idx = 3, \ | |
165 | .idle_idx = SD_IDLE_IDX, \ | |
166 | .newidle_idx = SD_NEWIDLE_IDX, \ | |
167 | .wake_idx = 1, \ | |
168 | .forkexec_idx = SD_FORKEXEC_IDX, \ | |
169 | .flags = SD_LOAD_BALANCE \ | |
170 | | SD_BALANCE_EXEC \ | |
171 | | SD_BALANCE_FORK \ | |
172 | | SD_SERIALIZE \ | |
173 | | SD_WAKE_BALANCE, \ | |
174 | .last_balance = jiffies, \ | |
175 | .balance_interval = 1, \ | |
176 | } | |
177 | ||
178 | #ifdef CONFIG_X86_64_ACPI_NUMA | |
179 | extern int __node_distance(int, int); | |
180 | #define node_distance(a, b) __node_distance(a, b) | |
181 | #endif | |
182 | ||
183 | #else /* !CONFIG_NUMA */ | |
184 | ||
185 | #define numa_node_id() 0 | |
186 | #define cpu_to_node(cpu) 0 | |
187 | #define early_cpu_to_node(cpu) 0 | |
188 | ||
189 | static inline const cpumask_t *_node_to_cpumask_ptr(int node) | |
190 | { | |
191 | return &cpu_online_map; | |
192 | } | |
193 | static inline cpumask_t node_to_cpumask(int node) | |
194 | { | |
195 | return cpu_online_map; | |
196 | } | |
197 | static inline int node_to_first_cpu(int node) | |
198 | { | |
199 | return first_cpu(cpu_online_map); | |
200 | } | |
201 | ||
202 | /* Replace default node_to_cpumask_ptr with optimized version */ | |
203 | #define node_to_cpumask_ptr(v, node) \ | |
204 | const cpumask_t *v = _node_to_cpumask_ptr(node) | |
205 | ||
206 | #define node_to_cpumask_ptr_next(v, node) \ | |
207 | v = _node_to_cpumask_ptr(node) | |
208 | #endif | |
209 | ||
210 | #include <asm-generic/topology.h> | |
211 | ||
212 | #ifdef CONFIG_NUMA | |
213 | /* Returns the number of the first CPU on Node 'node'. */ | |
214 | static inline int node_to_first_cpu(int node) | |
215 | { | |
216 | node_to_cpumask_ptr(mask, node); | |
217 | return first_cpu(*mask); | |
218 | } | |
219 | #endif | |
220 | ||
221 | extern cpumask_t cpu_coregroup_map(int cpu); | |
222 | ||
223 | #ifdef ENABLE_TOPO_DEFINES | |
224 | #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) | |
225 | #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) | |
226 | #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) | |
227 | #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) | |
228 | ||
229 | /* indicates that pointers to the topology cpumask_t maps are valid */ | |
230 | #define arch_provides_topology_pointers yes | |
231 | #endif | |
232 | ||
233 | static inline void arch_fix_phys_package_id(int num, u32 slot) | |
234 | { | |
235 | } | |
236 | ||
237 | struct pci_bus; | |
238 | void set_pci_bus_resources_arch_default(struct pci_bus *b); | |
239 | ||
240 | #ifdef CONFIG_SMP | |
241 | #define mc_capable() (boot_cpu_data.x86_max_cores > 1) | |
242 | #define smt_capable() (smp_num_siblings > 1) | |
243 | #endif | |
244 | ||
245 | #ifdef CONFIG_NUMA | |
246 | extern int get_mp_bus_to_node(int busnum); | |
247 | extern void set_mp_bus_to_node(int busnum, int node); | |
248 | #else | |
249 | static inline int get_mp_bus_to_node(int busnum) | |
250 | { | |
251 | return 0; | |
252 | } | |
253 | static inline void set_mp_bus_to_node(int busnum, int node) | |
254 | { | |
255 | } | |
256 | #endif | |
257 | ||
258 | #endif /* _ASM_X86_TOPOLOGY_H */ |