xref: /openbmc/linux/arch/ia64/include/asm/topology.h (revision b34e08d5)
1 /*
2  * Copyright (C) 2002, Erich Focht, NEC
3  *
4  * All rights reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 #ifndef _ASM_IA64_TOPOLOGY_H
12 #define _ASM_IA64_TOPOLOGY_H
13 
14 #include <asm/acpi.h>
15 #include <asm/numa.h>
16 #include <asm/smp.h>
17 
18 #ifdef CONFIG_NUMA
19 
20 /* Nodes w/o CPUs are preferred for memory allocations, see build_zonelists */
21 #define PENALTY_FOR_NODE_WITH_CPUS 255
22 
23 /*
24  * Distance above which we begin to use zone reclaim
25  */
26 #define RECLAIM_DISTANCE 15
27 
28 /*
29  * Returns a bitmask of CPUs on Node 'node'.
30  */
31 #define cpumask_of_node(node) ((node) == -1 ?				\
32 			       cpu_all_mask :				\
33 			       &node_to_cpu_mask[node])
34 
35 /*
36  * Returns the number of the node containing Node 'nid'.
37  * Not implemented here. Multi-level hierarchies detected with
38  * the help of node_distance().
39  */
40 #define parent_node(nid) (nid)
41 
42 /*
43  * Determines the node for a given pci bus
44  */
45 #define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
46 
47 void build_cpu_to_node_map(void);
48 
49 #define SD_CPU_INIT (struct sched_domain) {		\
50 	.parent			= NULL,			\
51 	.child			= NULL,			\
52 	.groups			= NULL,			\
53 	.min_interval		= 1,			\
54 	.max_interval		= 4,			\
55 	.busy_factor		= 64,			\
56 	.imbalance_pct		= 125,			\
57 	.cache_nice_tries	= 2,			\
58 	.busy_idx		= 2,			\
59 	.idle_idx		= 1,			\
60 	.newidle_idx		= 0,			\
61 	.wake_idx		= 0,			\
62 	.forkexec_idx		= 0,			\
63 	.flags			= SD_LOAD_BALANCE	\
64 				| SD_BALANCE_NEWIDLE	\
65 				| SD_BALANCE_EXEC	\
66 				| SD_BALANCE_FORK	\
67 				| SD_WAKE_AFFINE,	\
68 	.last_balance		= jiffies,		\
69 	.balance_interval	= 1,			\
70 	.nr_balance_failed	= 0,			\
71 }
72 
73 #endif /* CONFIG_NUMA */
74 
75 #ifdef CONFIG_SMP
76 #define topology_physical_package_id(cpu)	(cpu_data(cpu)->socket_id)
77 #define topology_core_id(cpu)			(cpu_data(cpu)->core_id)
78 #define topology_core_cpumask(cpu)		(&cpu_core_map[cpu])
79 #define topology_thread_cpumask(cpu)		(&per_cpu(cpu_sibling_map, cpu))
80 #endif
81 
82 extern void arch_fix_phys_package_id(int num, u32 slot);
83 
84 #define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
85 				 cpu_all_mask :				\
86 				 cpumask_of_node(pcibus_to_node(bus)))
87 
88 #include <asm-generic/topology.h>
89 
90 #endif /* _ASM_IA64_TOPOLOGY_H */
91