IDT Tsi578, Руководство пользователя

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12. Serial RapidIO Registers > Multicast Registers 396
Tsi578 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
12.13.2 RapidIO Multicast Maximum Latency Counter CSR
This register identifies the maximum time a packet copy can wait at the head of a broadcast buffer. If
this time limit is exceeded the multicast packet and packet copies in flight to the broadcast buffer are
dropped, and an interrupt is raised/port-write packet sent. Optionally, the port is removed from future
multicast operations until software clears the error.
Register name: RIO{0..15}_MC_LAT_LIMIT
Reset value: 0x0000_0000
Register offset: 1B004,1B104, 1B204, 1B304, 1B404,
1B504, 1B604, 1B704, 1B804, 1B904, 1BA04, 1BB04,
1BC04, 1BD04, 1BE04, 1BF04
Bits 0 1 2 3 4 5 6 7
00:07 AUTODEA
D
Reserved
08:15 MAX_MC_LAT
16:23 MAX_MC_LAT
24:31 MAX_MC_LAT
Bits Name Description Type
Reset
Value
0 AUTODEA
D Remove Port from Multicast if Latency Timer Expires Enable
0 = Do not remove port from multicast operations if the multicast
maximum latency timer expires for this port.
1 = Remove this port from future multicast operations if the multicast
maximum latency timer expires for this port.
R/W 0
1:7 Reserved N/A R 0
8:31 MAX_MC_L
AT The time period after which the oldest packet copy residing in the
broadcast buffer is deemed to have expired.
If MAX_MC_LAT == 0x0000, the multicast maximum latency feature is
disabled.
The timeout period is: 6.4ns * MAX_MC_LAT
When the multicast maximum latency counter expires, all packet
copies in the broadcast buffer are discarded. Packet copies that have
been partially transferred to the broadcast buffer are also discarded. A
port-write packet or interrupt may be issued to report an error.
Optionally, the port may be removed from future multicast operations
until software recovers the port.
Ports whose maximum latency timer have expired are marked in the
“RapidIO Broadcast Buffer Maximum Latency Expired Error Register”
on page 384
.
Note: If MAX_MC_LAT is set to its maximum value, it is equivalent to
the maximum time-to-live timeout value for packets.
R/W 0