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此仓库是为了提升国内下载速度的镜像仓库,每日同步一次。 原始仓库: https://github.com/riscv/opensbi
RISC-V Supervisor二进制接口(SBI)是以下之间的推荐接口: 在M模式下运行的特定于平台的固件,以S模式或HS模式执行的引导加载程序,管理程序或通用OS spread retract

https://www.oschina.net/p/opensbi

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OpenSBI Firmware with Dynamic Information (FW_DYNAMIC)

OpenSBI firmware with dynamic info (FW_DYNAMIC) is a firmware which gets information about next booting stage (e.g. a bootloader or an OS) and runtime OpenSBI library options from previous booting stage.

The previous booting stage will pass information to FW_DYNAMIC by creating struct fw_dynamic_info in memory and passing it's address to FW_DYNAMIC via a2 register of RISC-V CPU.

A FW_DYNAMIC firmware is particularly useful when the booting stage executed prior to OpenSBI firmware is capable of loading both the OpenSBI firmware and the booting stage binary to follow OpenSBI firmware.

FW_DYNAMIC Compilation

A platform can enable FW_DYNAMIC firmware using any of the following methods.

  1. Specifying FW_DYNAMIC=y on the top level make command line.
  2. Specifying FW_DYNAMIC=y in the target platform config.mk configuration file.

The compiled FW_DYNAMIC firmware ELF file is named fw_dynamic.elf. It's expanded image file is fw_dynamic.bin. Both files are created in the platform specific build directory under the build/platform/<platform_subdir>/firmware directory.

FW_DYNAMIC Firmware Configuration Options

The FW_DYNAMIC firmware does not requires any platform specific configuration parameters because all required information is passed by previous booting stage at runtime via struct fw_dynamic_info.

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