Add documentation for Himbaechel Gowin uarch

README.md

@@ -118,29 +118,33 @@ sudo make install
 
 Nexus support is currently experimental, and has only been tested with engineering sample silicon.
 
-### nextpnr-gowin
+### nextpnr-generic
 
-For Gowin support, install [Project Apicula](https://github.com/YosysHQ/apicula). If a virtualenv is used, the path to `gowin_bba` needs to be provided as follows:
+The generic target allows running placement and routing for arbitrary custom architectures.
 
 ```
-cmake . -DARCH=gowin -DGOWIN_BBA_EXECUTABLE=path
+cmake . -DARCH=generic
 make -j$(nproc)
 sudo make install
 ```
 
- - Examples of the Gowin flow for a range of boards can be found in the [Project Apicula Examples](https://github.com/YosysHQ/apicula/tree/master/examples).
+An example of how to use the generic flow is in [generic/examples](generic/examples). See also the [Generic Architecture docs](docs/generic.md).
 
-### nextpnr-generic
+### nextpnr-himbaechel
 
-The generic target allows running placement and routing for arbitrary custom architectures.
+The himbaechel target allows running placement and routing for larger architectures that share a common structure.
+
+#### gowin
+
+For Gowin support, install [Project Apicula](https://github.com/YosysHQ/apicula)
 
 ```
-cmake . -DARCH=generic
+cmake . -DARCH="himbaechel" -DHIMBAECHEL_GOWIN_DEVICES="all"
 make -j$(nproc)
 sudo make install
 ```
 
-An example of how to use the generic flow is in [generic/examples](generic/examples). See also the [Generic Architecture docs](docs/generic.md).
+ - Examples of the Gowin flow for a range of boards can be found in the [Project Apicula Examples](https://github.com/YosysHQ/apicula/tree/master/examples).
 
 ### GUI