IDT Tsi578, User Manual

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2. Serial RapidIO Interface > Lookup Tables 50
Tsi578 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
2.3.7 Lookup Table Error Summary
Table 1 summarizes error conditions and resulting behaviors associated with the LUTs.
Table 1: Error Summary
Event Behavior
Packet routed to a shut down port
a
a. When a port is shut down, all clocks are off to that port. Reading to the registers returns 0 (except for 0x158 and 0x15C which
give the correct values).
Packet discarded and no record of packet is kept
Packet routed to disabled port
b
b. The Port is a healthy port. Packets routed to that port is disallowed to pass through to the Link Partner. All registers are still
functional and when read, return the current operational values.
ISF time out occurs and a transaction error acknowledge
(TEA) interrupt is asserted (if enabled)
Note: The TEA signal is asserted when a timeout is detected
on the ISF due to the requested destination being blocked.
TEA is only asserted after the output port buffers are full.
When this signal is asserted, it indicates to the source of the
transaction that the requested transaction could not be
completed and is removed from the request queue. The TEA
error is reported through a port-write and/or an interrupt.
Programmable in the “Fabric Control Register” and the
interrupt status can be checked in the “Fabric Interrupt Status
Register”
Packet routed to unconnected port
c
c. It's the same as a powered-on port except that the Link Partner was behaving as disconnected to the port. The port is healthy
and when the link partner is resurrected, the link between the port and partner is be re-established.
Packet discarded and no record of packet is kept
Packet routed using an unmapped LUT entry, and the default
egress port is also unmapped. Packet header is recorded in the error capture registers and
the packet is discarded:
• IMP_SPEC_ERR bit is set in the “RapidIO Port x Error
Detect CSR”
• Port write can be generated (if enabled)
• Interrupt can be generated (if enabled).
Parity error on LUT entry Packet header is recorded in the error capture registers,
packet discarded
• IMP_SPEC_ERR bit is set in the “RapidIO Port x Error
Detect CSR”
• Port write can be generated
• Interrupt can be generated
• Port Number is also captured in “RapidIO Port x LUT Parity
Error Info CSR”
Writes to LUT entries through the broadcast LUT registers to
shutdown ports Silently ignored
Access to LUT with a destination ID which exceeds LUT size
(greater than 511 in flat mode) Writes silently ignored and reads return 0xF