diff options
| -rw-r--r-- | sys/sys/smp.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sys/sys/smp.h b/sys/sys/smp.h index 9fe9faf..277e879 100644 --- a/sys/sys/smp.h +++ b/sys/sys/smp.h @@ -17,6 +17,33 @@ #ifndef LOCORE #ifdef SMP + +/* + * Topology of a NUMA or HTT system. + * + * The top level topology is an array of pointers to groups. Each group + * contains a bitmask of cpus in its group or subgroups. It may also + * contain a pointer to an array of child groups. + * + * The bitmasks at non leaf groups may be used by consumers who support + * a smaller depth than the hardware provides. + * + * The topology may be omitted by systems where all CPUs are equal. + */ + +struct cpu_group { + u_int cg_mask; /* Mask of cpus in this group. */ + int cg_count; /* Count of cpus in this group. */ + int cg_children; /* Number of children groups. */ + struct cpu_group *cg_child; /* Optional child group. */ +}; + +struct cpu_top { + int ct_count; /* Count of groups. */ + struct cpu_group *ct_group; /* Array of pointers to cpu groups. */ +}; + +extern struct cpu_top *smp_topology; extern void (*cpustop_restartfunc)(void); extern int mp_ncpus; extern int smp_active; |
