The OpenTitan Reference Firmware Images together make up the Opentitan Reference Firmware Stack. Different images are used for different boot stages.
The Reference Firmware Images are, in boot order:
sw/device/silicon_creator/rom), executed at chip reset;sw/device/silicon_creator/rom_ext), the second stage Silicon Creator code, executed from flash; andThere are also some other standalone firmware images in the repository, which are only used for testing.
sw/device/tests contains several categories of chip-level tests, including smoke, IP integration, and system-level (use case) tests.
sw/device/benchmarks/coremark contains infrastructure for running the CoreMark benchmark suite on the OpenTitan device.
sw/device/riscv_compliance_support contains infrastructure so we can run the RISC-V Compliance tests on the OpenTitan core.
sw/device/sca contains on-device software used for Side-Channel Analysis.
sw/device/prebuilt contains pre-built Tock images, which may not be up-to-date.
sw/device/examples contains example images, including a simple Hello World.
There are also prototype versions of some of the boot stages, now only used for testing:
sw/device/lib/testing/test_rom is a previous, testing-only version of the ROM.sw/device/exts contains software for our prototype second boot stage images.{{% sectionContent %}}