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- Add structures for defining cpu topologies more complex than SMP.

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smp_topology may be left NULL by architectures which have vanilla SMP
   setups.
This commit is contained in:
Jeff Roberson 2003-06-28 22:06:19 +00:00
parent 8e1e7b93b3
commit 107902b895
1 changed files with 27 additions and 0 deletions
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27
sys/sys/smp.h
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@ -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;