Drive all output pins of the disabled interfaces with a constant value.
This avoids warnings from the tools about not driven output ports.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Mark all unused output ports explicitly as explicitly. This makes it clear
that they are left unconnected on purpose and avoids warnings from the
tools about unconnected ports.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Group the axi_dmac parameters by function and provide a human readable name
for the IPI GUI. This makes it easier to understand what parameter does
what when using the IPI GUI to configure the core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add validation values for the different configuration parameters. This
enables the tools to check whether the configured value is valid and avoids
accidental misconfiguration.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The address width for the AXI-Lite configuration bus for the core is only
14 bit. Remove the upper unused bits from the public interface.
This allows infrastructure code to know about this and it might be able to
perform optimizations of the interconnect based on this.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Move the clock and reset signals of the m_axi_src interface next to the
other signals in the module definition.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
According to the documentation when using a BRAM block in SDP mode the
REGCEB pin is not used and should be connected to GND. The tools though
when inferring a BRAM connect REGCEB to the same signal REGCEA. This causes
issues with timing verification since the REGCEB pin is associated with the
write clock whereas the REGCEA pin is associated with the read clock.
Until this is fixed in the tools mark all paths to the REGCEB pin as false
paths.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Configure the maximum burst size as well as the maximum number of active
requests on the AXI master interfaces according to the core configuration.
This allows connected slaves to know what kind of requests to expect and
allows them to configure themselves accordingly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The axi_dmac core does not issue narrow AXI bursts. Indicate this by
setting the SUPPORTS_NARROW_BURST property to 0 on both AXI master
interfaces.
This allows connected slaves to know that they will not receive narrow
bursts, which allows them to disable support for it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The axi_dmac core generates requests which are both AXI3 and AXI4
compliant. This means it is possible to connect it to both a AXI3 or AXI4
slave port without needing a AXI protocol converter. Unfortunately it is
not possible to declare a port as both AXI3 and AXI4 compliant, so the core
has the C_DMA_AXI_PROTCOL_SRC and C_DMA_AXI_PROTOCOL_DEST parameters, which
allow to configure the protocol type of the corresponding AXI master
interface. Currently the default is always AXI4.
But when being used on ZYNQ it is most likely that the AXI master interface
of the DMAC core ends up being connected to the AXI3, so change the default
to AXI3 if the core is instantiated in a ZYNQ design.
The default can still be overwritten by explicitly setting the
configuration property.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add support for querying the clock domains of the clock pins for the
axi_dmac controller. This allows the core to automatically figure out
whether its different parts run in different clock domains or not and setup
the configuration parameters accordingly.
Being able to auto-detect those configuration parameters makes the core
easier to use and also avoids accidental misconfiguration.
It is still possible to automatically overwrite the configuration
parameters by hand if necessary.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
bd files can be used to automate certain tasks in IP integrator when the
core is instantiated. Add a helper command for adding such files to a core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
For the source controller use the pause signal that has been properly
transferred to the source clock domain rather than the pause signal from
the request clock domain.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
When having multiple DMA cores sharing the same constraint file Vivado
seems to apply the constraints from the first core to all the other cores
when re-running synthesis and implementation from within the Vivado GUI.
This causes wrong timing constraints if the DMA cores have different
configurations. To avoid this issue use a TTCL template that generates a
custom constraint file for each DMA core instance.
This also allows us to drop the asynchronous clock detection hack from the
constraint file and move it to the template and only generate the CDC
constraints if the clock domains are asynchronous.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The synchronization interface is a single bidirectional line. Output for Master, input for Slave.
The sync_period value is relative to frame length and the digital interface clock. The actual synchronization
period will be: sync_period * frame_length * fb_clock_cycle
The memory mapped AXI interfaces for the AXI-DMAC are uni-directional.
Which means they are either write-only or read-only. Unfortunately the
Altera tools can't handle this, so we had to add dummy signals for the
other direction.
The Xilinx tools on the other hand handle uni-directional AXI interfaces
and in fact IPI can do a better job and use less resources when creating
the AXI interconnects when it knows that the interface is uni-directional.
So always disable the dummy ports for the IPI package.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Adrian Costina
Istvan Csomortani
Lars-Peter Clausen
Rejeesh Kutty