Specifications

Changing Shelf Settings Using HPI

FRU power-on sequence controls

Theshelfresource(ResourceId0x01)providesasetofHPIdiscretecontrols,eachofwhich

mapstoapowerdescriptor.ThediscretecontrolstatevaluesmaptotheslotResourceIdsof

eachofthesitesassociatedwiththepowerdescriptors.

EachintelligentFRUslotintheshelfhasonepowerdescriptorintheshelfactivationand

powermanagementrecordintheshelfFRUinformation.AcorrespondingnumberofFRU

power‐onsequencecontrolsexistintheshelfresource’sRDR,whicharenumberedstarting

with0x1301.TheslotResourceIdlistedasthecontrolstateofcontrol0x1301isthefirstsiteto

bepoweredon,theslotResourceIdlistedasthecontrolstateofcontrol0x1302isthenext

sitetobepoweredon,andsoon.

TheHPIapplicationcanchangethediscrete stateofanyofthesecontrolstoanyofthevalid

slotResourceIdstomodifythesequenceinwhichthesites(representedbytheslotresources)

arepoweredupbytheShMS.

Forexample,intheATCA‐6006shelf,thedefaultpower‐onsequencehasfrontslot3as8th

andslot5as10thtoreceivepower.Toexchangethepositionsoftheseslotsinthesequence,

soslot3becomes10thandslot5beco mes8th:

1. Changethediscretestatevalueofcontrol0x130Ato0x3FF86(slotResourceIdoffront

slot 3).

2. Changethediscretestatevalueofcontrol0x1308to0x5FF90(slotResourceIdoffront

slot 5).

FRU power-on sequence commit control

ChangingthecontrolstatesalonewouldnotmakethechangeintheshelfFRUinformation

persistent.Digitalcontrol0x1300isusedtoinitiatetheprocessofreorderingthepower

descriptorsintheshelfFRUinformation.Thisdigitalcontrol,knownastheFRUpower‐on

sequencecommitcontrol,acceptsonlytheSAHPI_CTRL_STATE_PULSE_ONvalueandupdates

theshelfactivationandpowermanagementrecordtothedesiredpower‐onsequenceafter

successfulcompletion.AfterupdatingthePower On Sequencecontrolstatesforthediscrete

Power On Sequencecontrols(0x1301–0x1316)asdesired,theHPIapplicationmustuse

control0x1300todoaControlSetwithdigitalvalue=SAHPI_CTRL_STATE_PULSE_ONto

committhechangestotheshelfFRUinformationandtheshelfFRUdevice,whereitwillbe

persistentfollowingashelfPower‐OnReset(POR).