opensbi | RISC-V Open Source Supervisor Binary Interface

opensbi is a C library. opensbi has no bugs, it has no vulnerabilities and it has low support. However opensbi has a Non-SPDX License. You can download it from GitHub.

The RISC-V Supervisor Binary Interface (SBI) is the recommended interface between:. The RISC-V SBI specification is maintained as an independent project by the RISC-V Foundation on [Github]. The goal of the OpenSBI project is to provide an open-source reference implementation of the RISC-V SBI specifications for platform-specific firmwares executing in M-mode (case 1 mentioned above). An OpenSBI implementation can be easily extended by RISC-V platform and system-on-chip vendors to fit a particular hardware configuration. The main component of OpenSBI is provided in the form of a platform-independent static library libsbi.a implementing the SBI interface. A firmware or bootloader implementation can link against this library to ensure conformance with the SBI interface specifications. libsbi.a also defines an interface for integrating with platform-specific operations provided by the platform firmware implementation (e.g. console access functions, inter-processor interrupt control, etc). To illustrate the use of the libsbi.a library, OpenSBI also provides a set of platform-specific support examples. For each example, a platform-specific static library libplatsbi.a can be compiled. This library implements SBI call processing by integrating libsbi.a with the necessary platform-dependent hardware manipulation functions. For all supported platforms, OpenSBI also provides several runtime firmware examples built using the platform libplatsbi.a. These example firmwares can be used to replace the legacy riscv-pk bootloader (aka BBL) and enable the use of well-known bootloaders such as [U-Boot].