AHCI_PREG_SSTS
r = ahci_pread(ap, AHCI_PREG_SSTS);
if (ahci_pwait_eq(ap, 3000, AHCI_PREG_SSTS,
data = ahci_pread(ap, AHCI_PREG_SSTS);
switch (ahci_pread(ap, AHCI_PREG_SSTS) & AHCI_PREG_SSTS_DET) {
r = ahci_pread(ap, AHCI_PREG_SSTS);
switch(ahci_pread(ap, AHCI_PREG_SSTS) &