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< # Copyright (c) 2012 ARM Limited
---
> # Copyright (c) 2012, 2015 ARM Limited
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< slave = VectorSlavePort("vector port for connecting masters")
< master = VectorMasterPort("vector port for connecting slaves")
< header_cycles = Param.Cycles(1, "cycles of overhead per transaction")
< width = Param.Unsigned(8, "xbar width (bytes)")
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> slave = VectorSlavePort("Vector port for connecting masters")
> master = VectorMasterPort("Vector port for connecting slaves")
>
> # Latencies governing the time taken for the variuos paths a
> # packet has through the crossbar. Note that the crossbar itself
> # does not add the latency due to assumptions in the coherency
> # mechanism. Instead the latency is annotated on the packet and
> # left to the neighbouring modules.
> #
> # A request incurs the frontend latency, possibly snoop filter
> # lookup latency, and forward latency. A response incurs the
> # response latency. Frontend latency encompasses arbitration and
> # deciding what to do when a request arrives. the forward latency
> # is the latency involved once a decision is made to forward the
> # request. The response latency, is similar to the forward
> # latency, but for responses rather than requests.
> frontend_latency = Param.Cycles(3, "Frontend latency")
> forward_latency = Param.Cycles(4, "Forward latency")
> response_latency = Param.Cycles(2, "Response latency")
>
> # Width governing the throughput of the crossbar
> width = Param.Unsigned(8, "Datapath width per port (bytes)")
>
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> # The coherent crossbar additionally has snoop responses that are
> # forwarded after a specific latency.
> snoop_response_latency = Param.Cycles(4, "Snoop response latency")
>
> # An optional snoop filter
> snoop_filter = Param.SnoopFilter(NULL, "Selected snoop filter")
>
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< snoop_filter = Param.SnoopFilter(NULL, "Selected snoop filter.")
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< lookup_latency = Param.Cycles(3, "lookup latency (cycles)")
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> # Lookup latency of the snoop filter, added to requests that pass
> # through a coherent crossbar.
> lookup_latency = Param.Cycles(1, "Lookup latency")
>
< # Copyright (c) 2012 ARM Limited
---
> # Copyright (c) 2012, 2015 ARM Limited
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< slave = VectorSlavePort("vector port for connecting masters")
< master = VectorMasterPort("vector port for connecting slaves")
< header_cycles = Param.Cycles(1, "cycles of overhead per transaction")
< width = Param.Unsigned(8, "xbar width (bytes)")
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> slave = VectorSlavePort("Vector port for connecting masters")
> master = VectorMasterPort("Vector port for connecting slaves")
>
> # Latencies governing the time taken for the variuos paths a
> # packet has through the crossbar. Note that the crossbar itself
> # does not add the latency due to assumptions in the coherency
> # mechanism. Instead the latency is annotated on the packet and
> # left to the neighbouring modules.
> #
> # A request incurs the frontend latency, possibly snoop filter
> # lookup latency, and forward latency. A response incurs the
> # response latency. Frontend latency encompasses arbitration and
> # deciding what to do when a request arrives. the forward latency
> # is the latency involved once a decision is made to forward the
> # request. The response latency, is similar to the forward
> # latency, but for responses rather than requests.
> frontend_latency = Param.Cycles(3, "Frontend latency")
> forward_latency = Param.Cycles(4, "Forward latency")
> response_latency = Param.Cycles(2, "Response latency")
>
> # Width governing the throughput of the crossbar
> width = Param.Unsigned(8, "Datapath width per port (bytes)")
>
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> # The coherent crossbar additionally has snoop responses that are
> # forwarded after a specific latency.
> snoop_response_latency = Param.Cycles(4, "Snoop response latency")
>
> # An optional snoop filter
> snoop_filter = Param.SnoopFilter(NULL, "Selected snoop filter")
>
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< snoop_filter = Param.SnoopFilter(NULL, "Selected snoop filter.")
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< lookup_latency = Param.Cycles(3, "lookup latency (cycles)")
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> # Lookup latency of the snoop filter, added to requests that pass
> # through a coherent crossbar.
> lookup_latency = Param.Cycles(1, "Lookup latency")
>