Altera RapidIO II MegaCore Function - Manual (Page 146)

6–8 Chapter 6: Software Interface
Physical Layer Registers
RapidIO II MegaCore Function August 2014 Altera Corporation
User Guide
Table 6–7. Port Link Time-Out Control CSR—0x120
Field Bits Access Function Default
VALUE [31:8] RW
Time-out interval value for link-layer event pairs such as the
time interval between sending a packet and receiving the
corresponding acknowledge control symbol, or between
sending a link-request and receiving the corresponding
link-response.
The duration of the link-response time-out is approximately
equal to 4.5 seconds multiplied by the contents of this field,
divided by (2
24 - 1).
24'hFF_FFFF
RSRV [7:0] UR0 Reserved 8’h0
Table 6–8. Port Response Time-Out Control CSR—0x124
Field Bits Access Function Default
VALUE [31:8] RW
Time-out internal value for request-response pairs: the time interval
between sending a request packet and receiving the corresponding
response packet.
The duration of the port response time-out for all transactions that require a
response—including MAINTENANCE, DOORBELL, NWRITE_R, and NREAD
transactions—is approximately equal to 4.5 seconds multiplied by the
contents of this field, divided by (2
24 - 1).
Note: A new value in this field might not propagate quickly enough to be
applied to the next transaction.
Note: Avoid changing the value in this field when any packet is waiting to be
transmitted or waiting for a response, to ensure that in each FIFO, the
pending entries all have the same time-out value.
24'hFF_FFFF
RSRV [7:0] UR0 Reserved 8'h0
Table 6–9. Port General Control—Offset: 0x13C (Part 1 of 2)
Field Bits Access Function Default
HOST [31] RW
A host device is a device that is responsible for system exploration, initialization,
and maintenance. Host devices typically initialize agent or slave devices.
1'b0 - agent or slave device
1'b1 - host device
This field is for software use only. Its value has no effect on hardware.
(1)
ENA [30] RW
The Master Enable bit controls whether or not a device is allowed to issue
requests to the system. If Master Enable is not set, the device may only
respond to requests.
1'b0 - The processing element cannot issue requests
1'b1 - The processing element can issue requests
(1)