/*
* pserialize_destroy:
*
* Destroy a passive serialization object.
*/
void
pserialize_destroy(pserialize_t psz)
{
KASSERT(psz->psz_owner == NULL);
kcpuset_destroy(psz->psz_target);
kcpuset_destroy(psz->psz_pass);
kmem_free(psz, sizeof(struct pserialize));
}
/*
* Halt all running cpus, excluding current cpu.
*/
void
cpu_halt_others(void)
{
kcpuset_t *kcp;
// If we are the only CPU running, there's nothing to do.
if (kcpuset_match(cpus_running, curcpu()->ci_data.cpu_kcpuset))
return;
// Get all running CPUs
kcpuset_clone(&kcp, cpus_running);
// Remove ourself
kcpuset_remove(kcp, curcpu()->ci_data.cpu_kcpuset);
// Remove any halted CPUs
kcpuset_remove(kcp, cpus_halted);
// If there are CPUs left, send the IPIs
if (!kcpuset_iszero(kcp)) {
cpu_multicast_ipi(kcp, IPI_HALT);
cpu_ipi_wait("halt", cpus_halted, kcp);
}
kcpuset_destroy(kcp);
/*
* TBD
* Depending on available firmware methods, other cpus will
* either shut down themselves, or spin and wait for us to
* stop them.
*/
}
void
kcpuset_unuse(kcpuset_t *c, kcpuset_t **lst)
{
if (atomic_dec_uint_nv(&c->nused) != 0)
return;
KASSERT(c->nused == 0);
KASSERT(c->next == NULL);
if (lst == NULL) {
kcpuset_destroy(c);
return;
}
c->next = *lst;
*lst = c;
}
