PCCCMD_ENPA
pcc->cmdr = (pm_creg &= ~(PCCCMD_ENPA | PCCCMD_ENPB));
pcc->cmdr = (pm_creg |= (PCCCMD_ENPA | PCCCMD_ENPB));
wdc->enable = ss->ss_curcmd & PCCCMD_ENPA ? 1 : 0;
ss->ss_curcmd |= PCCCMD_ENPB | PCCCMD_ENPA;
ss->ss_curcmd &= ~(PCCCMD_ENPB | PCCCMD_ENPA);