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
30#ifdef CONFIG_X86_HT
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)
33#define topology_core_siblings(cpu)		(cpu_core_map[cpu])
34#define topology_thread_siblings(cpu)		(cpu_sibling_map[cpu])
35#endif
36
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 */
44extern cpumask_t node_2_cpu_mask[];
45extern int cpu_2_node[];
46
47/* Returns the number of the node containing CPU 'cpu' */
48static 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'. */
58static 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'. */
64static inline int node_to_first_cpu(int node)
65{
66	cpumask_t mask = node_to_cpumask(node);
67	return first_cpu(mask);
68}
69
70#define pcibus_to_node(bus) ((long) (bus)->sysdata)
71#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus))
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,			\
77	.child			= NULL,			\
78	.groups			= NULL,			\
79	.min_interval		= 8,			\
80	.max_interval		= 32,			\
81	.busy_factor		= 32,			\
82	.imbalance_pct		= 125,			\
83	.cache_nice_tries	= 1,			\
84	.busy_idx		= 3,			\
85	.idle_idx		= 1,			\
86	.newidle_idx		= 2,			\
87	.wake_idx		= 1,			\
88	.flags			= SD_LOAD_BALANCE	\
89				| SD_BALANCE_EXEC	\
90				| SD_BALANCE_FORK	\
91				| SD_SERIALIZE		\
92				| SD_WAKE_BALANCE,	\
93	.last_balance		= jiffies,		\
94	.balance_interval	= 1,			\
95	.nr_balance_failed	= 0,			\
96}
97
98extern unsigned long node_start_pfn[];
99extern unsigned long node_end_pfn[];
100extern 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
114extern cpumask_t cpu_coregroup_map(int cpu);
115
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
121#endif /* _ASM_I386_TOPOLOGY_H */
122