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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. */
48extern cpumask_t node_to_cpumask_map[];
49
50/* Mappings between logical cpu number and node number */
51extern int cpu_to_node_map[];
52
53/* Returns the number of the node containing CPU 'cpu' */
54static 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 */
66static 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. */
74extern cpumask_t *node_to_cpumask_map;
75
76/* Mappings between logical cpu number and node number */
77DECLARE_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
83extern int cpu_to_node(int cpu);
84extern int early_cpu_to_node(int cpu);
85extern const cpumask_t *_node_to_cpumask_ptr(int node);
86extern 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' */
91static 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 */
97static 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'. */
106static 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'. */
112static 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
138extern unsigned long node_start_pfn[];
139extern unsigned long node_end_pfn[];
140extern 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
179extern 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
189static inline const cpumask_t *_node_to_cpumask_ptr(int node)
190{
191 return &cpu_online_map;
192}
193static inline cpumask_t node_to_cpumask(int node)
194{
195 return cpu_online_map;
196}
197static 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'. */
214static 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
221extern 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
233static inline void arch_fix_phys_package_id(int num, u32 slot)
234{
235}
236
237struct pci_bus;
238void 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
246extern int get_mp_bus_to_node(int busnum);
247extern void set_mp_bus_to_node(int busnum, int node);
248#else
249static inline int get_mp_bus_to_node(int busnum)
250{
251 return 0;
252}
253static inline void set_mp_bus_to_node(int busnum, int node)
254{
255}
256#endif
257
258#endif /* ASM_X86__TOPOLOGY_H */
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