include/asm-x86/topology_32.h

   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_I386_TOPOLOGY_H
  26 #define _ASM_I386_TOPOLOGY_H
  27
  28 #ifdef CONFIG_X86_HT
  29 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
  30 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
  31 #define topology_core_siblings(cpu)             (per_cpu(cpu_core_map, cpu))
  32 #define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
  33 #endif
  34
  35 #ifdef CONFIG_NUMA
  36
  37 #include <asm/mpspec.h>
  38
  39 #include <linux/cpumask.h>
  40
  41 /* Mappings between logical cpu number and node number */
  42 extern cpumask_t node_2_cpu_mask[];
  43 extern int cpu_2_node[];
  44
  45 /* Returns the number of the node containing CPU 'cpu' */
  46 static inline int cpu_to_node(int cpu)
  47 {
  48         return cpu_2_node[cpu];
  49 }
  50
  51 /* Returns the number of the node containing Node 'node'.  This architecture is flat,
  52    so it is a pretty simple function! */
  53 #define parent_node(node) (node)
  54
  55 /* Returns a bitmask of CPUs on Node 'node'. */
  56 static inline cpumask_t node_to_cpumask(int node)
  57 {
  58         return node_2_cpu_mask[node];
  59 }
  60
  61 /* Returns the number of the first CPU on Node 'node'. */
  62 static inline int node_to_first_cpu(int node)
  63 {
  64         cpumask_t mask = node_to_cpumask(node);
  65         return first_cpu(mask);
  66 }
  67
  68 #define pcibus_to_node(bus) ((struct pci_sysdata *)((bus)->sysdata))->node
  69 #define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus))
  70
  71 /* sched_domains SD_NODE_INIT for NUMAQ machines */
  72 #define SD_NODE_INIT (struct sched_domain) {            \
  73         .span                   = CPU_MASK_NONE,        \
  74         .parent                 = NULL,                 \
  75         .child                  = NULL,                 \
  76         .groups                 = NULL,                 \
  77         .min_interval           = 8,                    \
  78         .max_interval           = 32,                   \
  79         .busy_factor            = 32,                   \
  80         .imbalance_pct          = 125,                  \
  81         .cache_nice_tries       = 1,                    \
  82         .busy_idx               = 3,                    \
  83         .idle_idx               = 1,                    \
  84         .newidle_idx            = 2,                    \
  85         .wake_idx               = 1,                    \
  86         .flags                  = SD_LOAD_BALANCE       \
  87                                 | SD_BALANCE_EXEC       \
  88                                 | SD_BALANCE_FORK       \
  89                                 | SD_SERIALIZE          \
  90                                 | SD_WAKE_BALANCE,      \
  91         .last_balance           = jiffies,              \
  92         .balance_interval       = 1,                    \
  93         .nr_balance_failed      = 0,                    \
  94 }
  95
  96 extern unsigned long node_start_pfn[];
  97 extern unsigned long node_end_pfn[];
  98 extern unsigned long node_remap_size[];
  99
 100 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
 101
 102 #else /* !CONFIG_NUMA */
 103 /*
 104  * Other i386 platforms should define their own version of the
 105  * above macros here.
 106  */
 107
 108 #include <asm-generic/topology.h>
 109
 110 #endif /* CONFIG_NUMA */
 111
 112 extern cpumask_t cpu_coregroup_map(int cpu);
 113
 114 #ifdef CONFIG_SMP
 115 #define mc_capable()    (boot_cpu_data.x86_max_cores > 1)
 116 #define smt_capable()   (smp_num_siblings > 1)
 117 #endif
 118
 119 #endif /* _ASM_I386_TOPOLOGY_H */