include/asm-i386/topology.h

   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 */
  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
  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         .per_cpu_gain           = 100,                  \
  89         .flags                  = SD_LOAD_BALANCE       \
  90                                 | SD_BALANCE_EXEC       \
  91                                 | SD_BALANCE_FORK       \
  92                                 | SD_SERIALIZE          \
  93                                 | SD_WAKE_BALANCE,      \
  94         .last_balance           = jiffies,              \
  95         .balance_interval       = 1,                    \
  96         .nr_balance_failed      = 0,                    \
  97 }
  98
  99 extern unsigned long node_start_pfn[];
 100 extern unsigned long node_end_pfn[];
 101 extern unsigned long node_remap_size[];
 102
 103 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
 104
 105 #else /* !CONFIG_NUMA */
 106 /*
 107  * Other i386 platforms should define their own version of the
 108  * above macros here.
 109  */
 110
 111 #include <asm-generic/topology.h>
 112
 113 #endif /* CONFIG_NUMA */
 114
 115 extern cpumask_t cpu_coregroup_map(int cpu);
 116
 117 #ifdef CONFIG_SMP
 118 #define mc_capable()    (boot_cpu_data.x86_max_cores > 1)
 119 #define smt_capable()   (smp_num_siblings > 1)
 120 #endif
 121
 122 #endif /* _ASM_I386_TOPOLOGY_H */