sys/sys/cpu_topology.h

   1 #ifndef _CPU_TOPOLOGY_H_
   2 #define _CPU_TOPOLOGY_H_
   3
   4 #ifdef _KERNEL
   5
   6 #include <machine/cpumask.h>
   7
   8 /* CPU TOPOLOGY DATA AND FUNCTIONS */
   9 struct cpu_node {
  10         struct cpu_node * parent_node;
  11         struct cpu_node * child_node[MAXCPU];
  12         uint32_t child_no;
  13         cpumask_t members;
  14         uint8_t type;
  15         uint8_t compute_unit_id; /* AMD compute unit ID */
  16 };
  17 typedef struct cpu_node cpu_node_t;
  18
  19 extern int cpu_topology_levels_number;
  20 extern cpu_node_t *root_cpu_node;
  21
  22 cpumask_t get_cpumask_from_level(int cpuid, uint8_t level_type);
  23 cpu_node_t *get_cpu_node_by_cpuid(int cpuid);
  24 const cpu_node_t *get_cpu_node_by_chipid(int chip_id);
  25
  26 #define LEVEL_NO 4
  27
  28 /* Level type for CPU siblings */
  29 #define PACKAGE_LEVEL   1
  30 #define CHIP_LEVEL      2
  31 #define CORE_LEVEL      3
  32 #define THREAD_LEVEL    4
  33
  34 #define CPUSET_FOREACH(cpu, mask)                       \
  35         for ((cpu) = 0; (cpu) < ncpus; (cpu)++)         \
  36                 if (CPUMASK_TESTBIT(mask, cpu))
  37
  38
  39 #endif /* _KERNEL */
  40 #endif /* _CPU_TOPOLOGY_H_ */