initial commit: project architecture

1 files changed, 71 insertions, 0 deletions

diff --git a/rv64cpu/sw/CMakeLists.txt b/rv64cpu/sw/CMakeLists.txt
new file mode 100644
index 0000000..c43580f
--- /dev/null
+++ b/rv64cpu/sw/CMakeLists.txt
@@ -0,0 +1,71 @@
+# ─── 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
+# )