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1da177e4 LT |
1 | /* |
2 | * linux/include/asm-i386/topology.h | |
3 | * | |
4 | * Written by: Matthew Dobson, IBM Corporation | |
5 | * | |
6 | * Copyright (C) 2002, IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <colpatch@us.ibm.com> | |
26 | */ | |
27 | #ifndef _ASM_I386_TOPOLOGY_H | |
28 | #define _ASM_I386_TOPOLOGY_H | |
29 | ||
8b09fb34 | 30 | #ifdef CONFIG_X86_HT |
4b89aff9 RS |
31 | #define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id) |
32 | #define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id) | |
69dcc991 ZY |
33 | #define topology_core_siblings(cpu) (cpu_core_map[cpu]) |
34 | #define topology_thread_siblings(cpu) (cpu_sibling_map[cpu]) | |
35 | #endif | |
36 | ||
1da177e4 LT |
37 | #ifdef CONFIG_NUMA |
38 | ||
39 | #include <asm/mpspec.h> | |
40 | ||
41 | #include <linux/cpumask.h> | |
42 | ||
43 | /* Mappings between logical cpu number and node number */ | |
44 | extern cpumask_t node_2_cpu_mask[]; | |
45 | extern int cpu_2_node[]; | |
46 | ||
47 | /* Returns the number of the node containing CPU 'cpu' */ | |
48 | static inline int cpu_to_node(int cpu) | |
49 | { | |
50 | return cpu_2_node[cpu]; | |
51 | } | |
52 | ||
53 | /* Returns the number of the node containing Node 'node'. This architecture is flat, | |
54 | so it is a pretty simple function! */ | |
55 | #define parent_node(node) (node) | |
56 | ||
57 | /* Returns a bitmask of CPUs on Node 'node'. */ | |
58 | static inline cpumask_t node_to_cpumask(int node) | |
59 | { | |
60 | return node_2_cpu_mask[node]; | |
61 | } | |
62 | ||
63 | /* Returns the number of the first CPU on Node 'node'. */ | |
64 | static inline int node_to_first_cpu(int node) | |
65 | { | |
66 | cpumask_t mask = node_to_cpumask(node); | |
67 | return first_cpu(mask); | |
68 | } | |
69 | ||
69e1a33f | 70 | #define pcibus_to_node(bus) ((long) (bus)->sysdata) |
8c5a0908 | 71 | #define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus)) |
1da177e4 LT |
72 | |
73 | /* sched_domains SD_NODE_INIT for NUMAQ machines */ | |
74 | #define SD_NODE_INIT (struct sched_domain) { \ | |
75 | .span = CPU_MASK_NONE, \ | |
76 | .parent = NULL, \ | |
1a848870 | 77 | .child = NULL, \ |
1da177e4 LT |
78 | .groups = NULL, \ |
79 | .min_interval = 8, \ | |
80 | .max_interval = 32, \ | |
81 | .busy_factor = 32, \ | |
82 | .imbalance_pct = 125, \ | |
1da177e4 | 83 | .cache_nice_tries = 1, \ |
7897986b NP |
84 | .busy_idx = 3, \ |
85 | .idle_idx = 1, \ | |
86 | .newidle_idx = 2, \ | |
87 | .wake_idx = 1, \ | |
1da177e4 LT |
88 | .flags = SD_LOAD_BALANCE \ |
89 | | SD_BALANCE_EXEC \ | |
687f1661 | 90 | | SD_BALANCE_FORK \ |
08c183f3 | 91 | | SD_SERIALIZE \ |
1da177e4 LT |
92 | | SD_WAKE_BALANCE, \ |
93 | .last_balance = jiffies, \ | |
94 | .balance_interval = 1, \ | |
95 | .nr_balance_failed = 0, \ | |
96 | } | |
97 | ||
98 | extern unsigned long node_start_pfn[]; | |
99 | extern unsigned long node_end_pfn[]; | |
100 | extern unsigned long node_remap_size[]; | |
101 | ||
102 | #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) | |
103 | ||
104 | #else /* !CONFIG_NUMA */ | |
105 | /* | |
106 | * Other i386 platforms should define their own version of the | |
107 | * above macros here. | |
108 | */ | |
109 | ||
110 | #include <asm-generic/topology.h> | |
111 | ||
112 | #endif /* CONFIG_NUMA */ | |
113 | ||
1e9f28fa SS |
114 | extern cpumask_t cpu_coregroup_map(int cpu); |
115 | ||
5c45bf27 SS |
116 | #ifdef CONFIG_SMP |
117 | #define mc_capable() (boot_cpu_data.x86_max_cores > 1) | |
118 | #define smt_capable() (smp_num_siblings > 1) | |
119 | #endif | |
120 | ||
1da177e4 | 121 | #endif /* _ASM_I386_TOPOLOGY_H */ |