Fix numato csr headers

get_csr_header parameter with_shadow_base
removed/deprecated in litex 2a8d8c8f. New default
behavior matches the desired behavior in these targets.

litex commit 8be5824e258b84df240d34636aaa539124b92c65 simplified the handling
of csr regions and constants.

targets: keep attributes are no longer needed since automatically added when applying constraints to signals.

The SoCCore definition used to be available under litex.soc.integration,
however it was removed in
https://github.com/enjoy-digital/litex/commit/626533ce9d84ba081aa320dd330f5f0d800333b0



Signed-off-by: Sean Cross <sean@xobs.io>

Fomu Hacker supports dual spi, so add a "spiflash4x" definition.
The litex spi_flash module will run this flash in dual mode, because the
`dq` array is only two signals wide.

Signed-off-by: Sean Cross <sean@xobs.io>

This documentation can be fetched using a package such as lxsocdoc.

Signed-off-by: Sean Cross <sean@xobs.io>

These pins were swapped in the definition, which made them not work so
well.

Signed-off-by: Sean Cross <sean@xobs.io>

platforms/target: only catch ModuleNotFoundError exceptions to improve error reporting (thanks mwelling)

Gls sync litex

Sync up with Litex commit #49372852d.

Sync up with litex commit #201218b2c.

Sync up with litex commit #ae9c25b74.

memory device selection for ulx3s

add sys clock freq flag, uses same method as current versa code

This connector is for the six "debug" pins on the Raspberry Pi header.

Signed-off-by: Sean Cross <sean@xobs.io>

The D3 and D4 pins were swapped around, leading to interesting issues.

Signed-off-by: Sean Cross <sean@xobs.io>

Fomu cpu updates

Signed-off-by: Sean Cross <sean@xobs.io>

The heap placer is important enough that we should just make it the
default.

Also, add a `USBSoC` that includes the required interrupt table, as this
must be specified prior to calling `__init__()`.

Signed-off-by: Sean Cross <sean@xobs.io>

Use the memory array to find the address for the sram bank.

Signed-off-by: Sean Cross <sean@xobs.io>

Allow the user to specify a CPU.

Signed-off-by: Sean Cross <sean@xobs.io>