There will rarely be concurrent access to the peripheral control bus
interconnect, so there is no need to optimize for performace. Setting the
interconnect strategy to minimize area can reduce the resource usage by
~90%.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The AXI DMAC controller nativly supports AXI3, there is no need to insert a interconnect to do protocol conversion.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The DMA controller is able to send AXI3 compatible requests, no need to add
a interconnect for protocol conversion in between the DMA controller and the
HP port.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
There are only 4 DAC channels in the fmcomms2 design, so set the number of
channels of the dac_unpack core to 4. This slightly reduces resource usage
as well as reducing the DMA alignment requirement from 128bit to 64bit. The
later value is what existing applications expect the alignement requirement
to be.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We only do have 4 channels in this design. Reducing the number of supported
channels for the dac_util_unpack core to 4 from 8 lowers the DMA alignment
requirement from 128bit to 64bit. We need this since applications only
expect a DMA alignment requirement of 64bit.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We have enough bridge interconnect to give each DMA its own, so use them.
This makes sure that they do not interfere with each others transfers to
much. The SDRAM controller side of the FPGA2SDRAM bridges FIFO runs at a
much faster frequency then what we are able to use in the fabric. So its
better to do the arbitration on that side of the bus to make sure that we
can utilize the buses in the FPGA fabric to the maximum for each DMA core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This is unused and unneeded. The AXI interconnect will make sure that a
peripheral only gets requests that are meant for it, there is no need to
check the address in the peripheral itself.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Otherwise we get timing errors for the reset signal that is generated in the
50MHz clock domain, but used in the VGA PLL clock domain.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Lars-Peter Clausen
Istvan Csomortani
Adrian Costina
Rejeesh Kutty
Michael Hennerich
acozma
dbogdan