Serial RapidIO (SRIO) User's Guide

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5.56 Processing Element Features CAR (PE_FEAT)
SRIO Registers
The processing element features CAR (PE_FEAT) is shown in Figure 119 and described in Table 127 .
Figure 119. Processing Element Features CAR (PE_FEAT) - Address Offset 1010h
31 30 29 28 27 24
BRIDGE MEMORY PROCESSOR SWITCH Reserved
R-0 R-0 R-1 R-0 R-0h
23 16
Reserved
R-00h
15 8
Reserved
R-00h
7 6 5 4 3 2 0
FLOW_
RETRANSMIT_ CRF_ LARGE_ EXTENDED_
CONTROL_ EXTENDED_ADDRESSING_SUPPORT
SUPPRESS SUPPORT SUPPORT FEATURES
SUPPORT
R-0 R-0 R-0 R-0 R-1 R-001
LEGEND: R = Read only; - n = Value after reset
Table 127. Processing Element Features CAR (PE_FEAT) Field Descriptions
Bit Field Value Description
31 BRIDGE PE can bridge to another interface. Examples are PCI,
proprietary processor buses, DRAM, etc.
30 MEMORY PE has physically addressable local address space and can be
accessed as an endpoint through non-maintenance (i.e.,
non-coherent read and write) operations. This local address
space may be limited to local configuration Registers, or could be
on-chip SRAM, etc.
29 PROCESSOR PE physically contains a local processor or similar device that
executes code. A device that bridges to an interface that
connects to a processor does not count (see bit 31).
28 SWITCH PE can bridge to another external RapidIO interface. An internal
port to a local endpoint does not count as a switch port. For
example, a device with two RapidIO ports and a local endpoint is
a two port switch, not a three port switch, regardless of the
internal architecture.
27–8 Reserved 0 These read-only bits return 0s when read.
7 FLOW_CONTROL_SUPPORT PE supports congestion flow control mechanism
0 PE does not support flow control
1 PE supports flow control
6 RETRANSMIT_SUPPRESS PE supports suppression of error recovery on packet CRC errors.
0 PE does not support suppression
1 PE supports suppression
5 CRF_SUPPORT This bit indicates PE support for the Critical Request Flow (CRF)
Function.
0 PE does not support CRF Function
1 PE supports CRF Function
4 LARGE_SUPPORT Support of common transport large systems.
0 PE does not support common transport large systems
1 PE supports common transport large systems
3 EXTENDED_FEATURES PE has extended features list; the extended features pointer is
valid.
186 Serial RapidIO (SRIO) SPRUE13A – September 2006
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