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cmake_minimum_required(VERSION 3.5)
project(chipdb-gowin NONE)
set(ALL_GOWIN_DEVICES GW1N-1 GW1N-4 GW1N-9)
set(GOWIN_DEVICES ${ALL_GOWIN_DEVICES} CACHE STRING
"Include support for these Gowin devices (available: ${ALL_GOWIN_DEVICES})")
message(STATUS "Enabled Gowin devices: ${GOWIN_DEVICES}")
find_program (GOWIN_BBA_EXECUTABLE gowin_bba)
message(STATUS "gowin_bba executable: ${GOWIN_BBA_EXECUTABLE}")
if(DEFINED GOWIN_CHIPDB)
add_custom_target(chipdb-gowin-bbas ALL)
else()
find_package(PythonInterp 3.6 REQUIRED)
# shared among all families
set(SERIALIZE_CHIPDBS TRUE CACHE BOOL
"Serialize device data preprocessing to minimize memory use")
set(all_device_bbas)
file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/chipdb)
foreach(device ${GOWIN_DEVICES})
if(NOT device IN_LIST ALL_GOWIN_DEVICES)
message(FATAL_ERROR "Device ${device} is not a supported Gowin device")
endif()
set(device_bba chipdb/chipdb-${device}.bba)
add_custom_command(
OUTPUT ${device_bba}
COMMAND ${GOWIN_BBA_EXECUTABLE} -d ${device} -i ${CMAKE_CURRENT_SOURCE_DIR}/constids.inc -o ${device_bba}.new
# atomically update
COMMAND ${CMAKE_COMMAND} -E rename ${device_bba}.new ${device_bba}
DEPENDS
${GOWIN_BBA_EXECUTABLE}
${PREVIOUS_CHIPDB_TARGET}
${CMAKE_CURRENT_SOURCE_DIR}/constids.inc
VERBATIM)
list(APPEND all_device_bbas ${device_bba})
if(SERIALIZE_CHIPDBS)
set(PREVIOUS_CHIPDB_TARGET ${CMAKE_CURRENT_BINARY_DIR}/${device_bba})
endif()
endforeach()
add_custom_target(chipdb-gowin-bbas ALL DEPENDS ${all_device_bbas})
get_directory_property(has_parent PARENT_DIRECTORY)
if(has_parent)
set(GOWIN_CHIPDB ${CMAKE_CURRENT_BINARY_DIR}/chipdb PARENT_SCOPE)
# serialize chipdb build across multiple architectures
set(PREVIOUS_CHIPDB_TARGET chipdb-gowin-bbas PARENT_SCOPE)
else()
message(STATUS "Build nextpnr with -DGOWIN_CHIPDB=${CMAKE_CURRENT_BINARY_DIR}/chipdb")
endif()
endif()
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