MB86613S Просмотр технического описания (PDF) - Fujitsu

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MB86613S

IEEE1394 Open HCI Controller

Fujitsu 

Preliminary

8.6. Notes on Software Implementation

This section describes the software implementations and the corresponding event happened.

1) Bus Reset:

Set the IBR bit of PHY register :

1) when the received self ID packet is abnormal.

2) when IntEvent.cycleTooLong is detected.

3) when a topology needs to change at bus manager operation.

2) Generation of Response Packet :

when a read request packet is received for speed map or topology map is received.

3) Cycle Master Setting :

Set LinkControl.cycleMaster bit :

1) when the device is a root and STATE_CLEAR.cmstr bit (”FFFF_F000_0000h”) is set by

the write request packet from a bus manager.

4) Power Management (when at bus manager operation) :

Transmit a link- on packet:

when enough cable power can be provided based on a calculation of pwr field in selfID packet.

5) Cycle Master (when at bus manager operation) :

Set the force_root bit by sending the phy configuration packet to a root node, and set STATE_CLEAR.

cmstr bit by sending the write request packet.

Make sure that cmc bit in bus_Info_block where 1394 configuration ROM of a root node contains is set.

6) Change Root Node :

Search for the node who has it’s cmc bit = ”1” in the 1394 configuration ROM and set the force_root bit of

found node by the phy configuration packet :

when the current root does not have the cycle master function.

7) Construction of Speed Map and Topology Map :

When the self ID packet is received.

8) Intention to be Bus Manager :

Intend to be a bus manager by sending a lock request packet to the resource manager:

when it want to be a bus manager.

9) Management of priority budget Register :

Store the pri_max value of priority budget register in the pri_req field of Fairness Control register:

when the write request packet is received from the bus manager to priority budget register

(”FFFF_F000_0218h”).

10) Management of LINK ON (when at bus manager operation) :

Clear PacketControl.autoLinkPkt bit :

when it wants to be able to transmit or receive the Link- on packet.

11) Verification of Self ID Packet (when at resource manager) :

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