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# ─── Software Build (Bare-Metal) ─────────────────────────────────────────────────
#
# This CMakeLists.txt is only included when BUILD_SW=ON and requires
# the RISC-V cross-compilation toolchain:
#
# cmake -B build_sw -DBUILD_SW=ON \
# -DCMAKE_TOOLCHAIN_FILE=tools/toolchain-riscv64.cmake
#
# ─────────────────────────────────────────────────────────────────────────────────
enable_language(ASM)
set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/common/link.ld)
set(STARTUP_SRC ${CMAKE_CURRENT_SOURCE_DIR}/common/start.S)
# ─── Helper: create a bare-metal firmware target ─────────────────────────────────
function(add_firmware)
cmake_parse_arguments(FW "" "NAME" "SOURCES" ${ARGN})
add_executable(${FW_NAME}.elf
${STARTUP_SRC}
${FW_SOURCES}
)
target_include_directories(${FW_NAME}.elf PRIVATE
${CMAKE_CURRENT_SOURCE_DIR}/common
)
target_link_options(${FW_NAME}.elf PRIVATE
-T${LINKER_SCRIPT}
-Wl,-Map=${FW_NAME}.map
)
# Generate .bin
add_custom_command(TARGET ${FW_NAME}.elf POST_BUILD
COMMAND ${CMAKE_OBJCOPY} -O binary
${FW_NAME}.elf ${FW_NAME}.bin
COMMENT "Generating ${FW_NAME}.bin"
)
# Generate .hex (for $readmemh)
add_custom_command(TARGET ${FW_NAME}.elf POST_BUILD
COMMAND ${CMAKE_OBJCOPY} -O verilog
${FW_NAME}.elf ${FW_NAME}.hex
COMMENT "Generating ${FW_NAME}.hex"
)
# Print size
add_custom_command(TARGET ${FW_NAME}.elf POST_BUILD
COMMAND ${CMAKE_SIZE} ${FW_NAME}.elf
)
endfunction()
# ═══════════════════════════════════════════════════════════════════════════════════
# Firmware Targets — uncomment as you create the source files
# ═══════════════════════════════════════════════════════════════════════════════════
#
# add_firmware(
# NAME hello_uart
# SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/baremetal/hello_uart/main.c
# )
#
# add_firmware(
# NAME timer_irq
# SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/baremetal/timer_irq/main.c
# )
#
# add_firmware(
# NAME cache_test
# SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/baremetal/cache_test/main.c
# )
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