rtc: add support for the S-35390A RTC chip
[wrt350n-kernel.git] / include / asm-x86 / topology.h
blob8af05a93f09714dd16fd54b7e3119960e554f103
1 /*
2 * Written by: Matthew Dobson, IBM Corporation
4 * Copyright (C) 2002, IBM Corp.
6 * All rights reserved.
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
17 * details.
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
28 #ifdef CONFIG_NUMA
29 #include <linux/cpumask.h>
30 #include <asm/mpspec.h>
32 /* Mappings between logical cpu number and node number */
33 #ifdef CONFIG_X86_32
34 extern int cpu_to_node_map[];
36 #else
37 DECLARE_PER_CPU(int, x86_cpu_to_node_map);
38 extern int x86_cpu_to_node_map_init[];
39 extern void *x86_cpu_to_node_map_early_ptr;
40 /* Returns the number of the current Node. */
41 #define numa_node_id() (early_cpu_to_node(raw_smp_processor_id()))
42 #endif
44 extern cpumask_t node_to_cpumask_map[];
46 #define NUMA_NO_NODE (-1)
48 /* Returns the number of the node containing CPU 'cpu' */
49 #ifdef CONFIG_X86_32
50 #define early_cpu_to_node(cpu) cpu_to_node(cpu)
51 static inline int cpu_to_node(int cpu)
53 return cpu_to_node_map[cpu];
56 #else /* CONFIG_X86_64 */
57 static inline int early_cpu_to_node(int cpu)
59 int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
61 if (cpu_to_node_map)
62 return cpu_to_node_map[cpu];
63 else if (per_cpu_offset(cpu))
64 return per_cpu(x86_cpu_to_node_map, cpu);
65 else
66 return NUMA_NO_NODE;
69 static inline int cpu_to_node(int cpu)
71 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
72 if (x86_cpu_to_node_map_early_ptr) {
73 printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n",
74 (int)cpu);
75 dump_stack();
76 return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
78 #endif
79 if (per_cpu_offset(cpu))
80 return per_cpu(x86_cpu_to_node_map, cpu);
81 else
82 return NUMA_NO_NODE;
84 #endif /* CONFIG_X86_64 */
87 * Returns the number of the node containing Node 'node'. This
88 * architecture is flat, so it is a pretty simple function!
90 #define parent_node(node) (node)
92 /* Returns a bitmask of CPUs on Node 'node'. */
93 static inline cpumask_t node_to_cpumask(int node)
95 return node_to_cpumask_map[node];
98 /* Returns the number of the first CPU on Node 'node'. */
99 static inline int node_to_first_cpu(int node)
101 cpumask_t mask = node_to_cpumask(node);
103 return first_cpu(mask);
106 #define pcibus_to_node(bus) __pcibus_to_node(bus)
107 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
109 #ifdef CONFIG_X86_32
110 extern unsigned long node_start_pfn[];
111 extern unsigned long node_end_pfn[];
112 extern unsigned long node_remap_size[];
113 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
115 # ifdef CONFIG_X86_HT
116 # define ENABLE_TOPO_DEFINES
117 # endif
119 # define SD_CACHE_NICE_TRIES 1
120 # define SD_IDLE_IDX 1
121 # define SD_NEWIDLE_IDX 2
122 # define SD_FORKEXEC_IDX 0
124 #else
126 # ifdef CONFIG_SMP
127 # define ENABLE_TOPO_DEFINES
128 # endif
130 # define SD_CACHE_NICE_TRIES 2
131 # define SD_IDLE_IDX 2
132 # define SD_NEWIDLE_IDX 0
133 # define SD_FORKEXEC_IDX 1
135 #endif
137 /* sched_domains SD_NODE_INIT for NUMAQ machines */
138 #define SD_NODE_INIT (struct sched_domain) { \
139 .span = CPU_MASK_NONE, \
140 .parent = NULL, \
141 .child = NULL, \
142 .groups = NULL, \
143 .min_interval = 8, \
144 .max_interval = 32, \
145 .busy_factor = 32, \
146 .imbalance_pct = 125, \
147 .cache_nice_tries = SD_CACHE_NICE_TRIES, \
148 .busy_idx = 3, \
149 .idle_idx = SD_IDLE_IDX, \
150 .newidle_idx = SD_NEWIDLE_IDX, \
151 .wake_idx = 1, \
152 .forkexec_idx = SD_FORKEXEC_IDX, \
153 .flags = SD_LOAD_BALANCE \
154 | SD_BALANCE_EXEC \
155 | SD_BALANCE_FORK \
156 | SD_SERIALIZE \
157 | SD_WAKE_BALANCE, \
158 .last_balance = jiffies, \
159 .balance_interval = 1, \
160 .nr_balance_failed = 0, \
163 #ifdef CONFIG_X86_64_ACPI_NUMA
164 extern int __node_distance(int, int);
165 #define node_distance(a, b) __node_distance(a, b)
166 #endif
168 #else /* CONFIG_NUMA */
170 #include <asm-generic/topology.h>
172 #endif
174 extern cpumask_t cpu_coregroup_map(int cpu);
176 #ifdef ENABLE_TOPO_DEFINES
177 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
178 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
179 #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
180 #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
181 #endif
183 #ifdef CONFIG_SMP
184 #define mc_capable() (boot_cpu_data.x86_max_cores > 1)
185 #define smt_capable() (smp_num_siblings > 1)
186 #endif
188 #endif