LCOV - code coverage report
Current view: top level - lkbce/arch/x86/include/asm - topology.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       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             : /*
      39             :  * to preserve the visibility of NUMA_NO_NODE definition,
      40             :  * moved to there from here.  May be used independent of
      41             :  * CONFIG_NUMA.
      42             :  */
      43             : #include <linux/numa.h>
      44             : 
      45             : #ifdef CONFIG_NUMA
      46             : #include <linux/cpumask.h>
      47             : 
      48             : #include <asm/mpspec.h>
      49             : 
      50             : #ifdef CONFIG_X86_32
      51             : 
      52             : /* Mappings between logical cpu number and node number */
      53             : extern int cpu_to_node_map[];
      54             : 
      55             : /* Returns the number of the node containing CPU 'cpu' */
      56             : static inline int cpu_to_node(int cpu)
      57             : {
      58             :         return cpu_to_node_map[cpu];
      59             : }
      60             : #define early_cpu_to_node(cpu)  cpu_to_node(cpu)
      61             : 
      62             : #else /* CONFIG_X86_64 */
      63             : 
      64             : /* Mappings between logical cpu number and node number */
      65             : DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
      66             : 
      67             : /* Returns the number of the current Node. */
      68             : DECLARE_PER_CPU(int, node_number);
      69             : #define numa_node_id()          percpu_read(node_number)
      70             : 
      71             : #ifdef CONFIG_DEBUG_PER_CPU_MAPS
      72             : extern int cpu_to_node(int cpu);
      73             : extern int early_cpu_to_node(int cpu);
      74             : 
      75             : #else   /* !CONFIG_DEBUG_PER_CPU_MAPS */
      76             : 
      77             : /* Returns the number of the node containing CPU 'cpu' */
      78             : static inline int cpu_to_node(int cpu)
      79             : {
      80             :         return per_cpu(x86_cpu_to_node_map, cpu);
      81             : }
      82             : 
      83             : /* Same function but used if called before per_cpu areas are setup */
      84             : static inline int early_cpu_to_node(int cpu)
      85             : {
      86             :         return early_per_cpu(x86_cpu_to_node_map, cpu);
      87             : }
      88             : 
      89             : #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
      90             : 
      91             : #endif /* CONFIG_X86_64 */
      92             : 
      93             : /* Mappings between node number and cpus on that node. */
      94             : extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
      95             : 
      96             : #ifdef CONFIG_DEBUG_PER_CPU_MAPS
      97             : extern const struct cpumask *cpumask_of_node(int node);
      98             : #else
      99             : /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
     100             : static inline const struct cpumask *cpumask_of_node(int node)
     101             : {
     102             :         return node_to_cpumask_map[node];
     103             : }
     104             : #endif
     105             : 
     106             : extern void setup_node_to_cpumask_map(void);
     107             : 
     108             : /*
     109             :  * Returns the number of the node containing Node 'node'. This
     110             :  * architecture is flat, so it is a pretty simple function!
     111             :  */
     112             : #define parent_node(node) (node)
     113             : 
     114             : #define pcibus_to_node(bus) __pcibus_to_node(bus)
     115             : 
     116             : #ifdef CONFIG_X86_32
     117             : extern unsigned long node_start_pfn[];
     118             : extern unsigned long node_end_pfn[];
     119             : extern unsigned long node_remap_size[];
     120             : #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
     121             : 
     122             : # define SD_CACHE_NICE_TRIES    1
     123             : # define SD_IDLE_IDX            1
     124             : 
     125             : #else
     126             : 
     127             : # define SD_CACHE_NICE_TRIES    2
     128             : # define SD_IDLE_IDX            2
     129             : 
     130             : #endif
     131             : 
     132             : /* sched_domains SD_NODE_INIT for NUMA machines */
     133             : #define SD_NODE_INIT (struct sched_domain) {                            \
     134             :         .min_interval           = 8,                                    \
     135             :         .max_interval           = 32,                                   \
     136             :         .busy_factor            = 32,                                   \
     137             :         .imbalance_pct          = 125,                                  \
     138             :         .cache_nice_tries       = SD_CACHE_NICE_TRIES,                  \
     139             :         .busy_idx               = 3,                                    \
     140             :         .idle_idx               = SD_IDLE_IDX,                          \
     141             :         .newidle_idx            = 0,                                    \
     142             :         .wake_idx               = 0,                                    \
     143             :         .forkexec_idx           = 0,                                    \
     144             :                                                                         \
     145             :         .flags                  = 1*SD_LOAD_BALANCE                     \
     146             :                                 | 1*SD_BALANCE_NEWIDLE                  \
     147             :                                 | 1*SD_BALANCE_EXEC                     \
     148             :                                 | 1*SD_BALANCE_FORK                     \
     149             :                                 | 0*SD_BALANCE_WAKE                     \
     150             :                                 | 1*SD_WAKE_AFFINE                      \
     151             :                                 | 0*SD_PREFER_LOCAL                     \
     152             :                                 | 0*SD_SHARE_CPUPOWER                   \
     153             :                                 | 0*SD_POWERSAVINGS_BALANCE             \
     154             :                                 | 0*SD_SHARE_PKG_RESOURCES              \
     155             :                                 | 1*SD_SERIALIZE                        \
     156             :                                 | 0*SD_PREFER_SIBLING                   \
     157             :                                 ,                                       \
     158             :         .last_balance           = jiffies,                              \
     159             :         .balance_interval       = 1,                                    \
     160             : }
     161             : 
     162             : #ifdef CONFIG_X86_64_ACPI_NUMA
     163             : extern int __node_distance(int, int);
     164             : #define node_distance(a, b) __node_distance(a, b)
     165             : #endif
     166             : 
     167             : #else /* !CONFIG_NUMA */
     168             : 
     169             : static inline int numa_node_id(void)
     170             : {
     171             :         return 0;
     172             : }
     173             : 
     174             : static inline int early_cpu_to_node(int cpu)
     175             : {
     176             :         return 0;
     177             : }
     178             : 
     179             : static inline void setup_node_to_cpumask_map(void) { }
     180             : 
     181             : #endif
     182             : 
     183             : #include <asm-generic/topology.h>
     184             : 
     185             : extern const struct cpumask *cpu_coregroup_mask(int cpu);
     186             : 
     187             : #ifdef ENABLE_TOPO_DEFINES
     188             : #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
     189             : #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
     190             : #define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
     191             : #define topology_thread_cpumask(cpu)            (per_cpu(cpu_sibling_map, cpu))
     192             : 
     193             : /* indicates that pointers to the topology cpumask_t maps are valid */
     194             : #define arch_provides_topology_pointers         yes
     195             : #endif
     196             : 
     197             : static inline void arch_fix_phys_package_id(int num, u32 slot)
     198             : {
     199             : }
     200           1 : 
     201             : struct pci_bus;
     202             : void x86_pci_root_bus_res_quirks(struct pci_bus *b);
     203             : 
     204             : #ifdef CONFIG_SMP
     205             : #define mc_capable()    ((boot_cpu_data.x86_max_cores > 1) && \
     206             :                         (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
     207             : #define smt_capable()                   (smp_num_siblings > 1)
     208             : #endif
     209             : 
     210             : #ifdef CONFIG_NUMA
     211             : extern int get_mp_bus_to_node(int busnum);
     212             : extern void set_mp_bus_to_node(int busnum, int node);
     213             : #else
     214             : static inline int get_mp_bus_to_node(int busnum)
     215             : {
     216             :         return 0;
     217             : }
     218             : static inline void set_mp_bus_to_node(int busnum, int node)
     219             : {
     220             : }
     221             : #endif
     222             : 
     223             : #endif /* _ASM_X86_TOPOLOGY_H */

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