static int
acpicpu_once_detach(void)
{
struct acpicpu_softc *sc;
if (acpicpu_count != 0)
return EDEADLK;
cpufreq_deregister();
if (acpicpu_log != NULL)
sysctl_teardown(&acpicpu_log);
if (acpicpu_sc != NULL)
kmem_free(acpicpu_sc, maxcpus * sizeof(*sc));
return 0;
}
int
cpufreq_register(struct cpufreq *cf)
{
uint32_t c, i, j, k, m;
int rv;
if (cold != 0)
return EBUSY;
KASSERT(cf != NULL);
KASSERT(cf_backend != NULL);
KASSERT(cf->cf_get_freq != NULL);
KASSERT(cf->cf_set_freq != NULL);
KASSERT(cf->cf_state_count > 0);
KASSERT(cf->cf_state_count < CPUFREQ_STATE_MAX);
mutex_enter(&cpufreq_lock);
if (cf_backend->cf_init != false) {
mutex_exit(&cpufreq_lock);
return EALREADY;
}
cf_backend->cf_init = true;
cf_backend->cf_mp = cf->cf_mp;
cf_backend->cf_cookie = cf->cf_cookie;
cf_backend->cf_get_freq = cf->cf_get_freq;
cf_backend->cf_set_freq = cf->cf_set_freq;
(void)strlcpy(cf_backend->cf_name, cf->cf_name, sizeof(cf->cf_name));
/*
* Sanity check the values and verify descending order.
*/
for (c = i = 0; i < cf->cf_state_count; i++) {
CTASSERT(CPUFREQ_STATE_ENABLED != 0);
CTASSERT(CPUFREQ_STATE_DISABLED != 0);
if (cf->cf_state[i].cfs_freq == 0)
continue;
if (cf->cf_state[i].cfs_freq > 9999 &&
cf->cf_state[i].cfs_freq != CPUFREQ_STATE_ENABLED &&
cf->cf_state[i].cfs_freq != CPUFREQ_STATE_DISABLED)
continue;
for (j = k = 0; j < i; j++) {
if (cf->cf_state[i].cfs_freq >=
cf->cf_state[j].cfs_freq) {
k = 1;
break;
}
}
if (k != 0)
continue;
cf_backend->cf_state[c].cfs_index = c;
cf_backend->cf_state[c].cfs_freq = cf->cf_state[i].cfs_freq;
cf_backend->cf_state[c].cfs_power = cf->cf_state[i].cfs_power;
c++;
}
cf_backend->cf_state_count = c;
if (cf_backend->cf_state_count == 0) {
mutex_exit(&cpufreq_lock);
cpufreq_deregister();
return EINVAL;
}
rv = cpufreq_latency();
if (rv != 0) {
mutex_exit(&cpufreq_lock);
cpufreq_deregister();
return rv;
}
m = cpufreq_get_max();
cpufreq_set_all_raw(m);
mutex_exit(&cpufreq_lock);
return 0;
}
