forked from Mirrors/opensbi
bc99e707cd
Instead of placing FDT (passed by previous booting stage) at a location relative to next address we should have absolute location of placing FDT so that we more freedom of placing FDT. This will be particularly useful for platforms/boards with very less RAM (such as Kendryte board). Due to above motivation, we rename FW_xyz_FDT_OFFSET options to FW_xyz_FDT_ADDR options and use FW_xyz_FDT_ADDR options as absolute address for placing FDT. Signed-off-by: Anup Patel <anup.patel@wdc.com>
RISC-V Open Source Supervisor Binary Interface (OpenSBI)
The RISC-V Supervisor Binary Interface (SBI) is a recommended interface between:
- platform specific firmware running in M-mode and bootloader running in S-mode
- platform specific firmware running in M-mode and general purpose operating system running in S-mode
- hypervisor runnng in HS-mode and general purpose operating system running in VS-mode.
The RISC-V SBI spec is maintained as independent project by RISC-V Foundation at https://github.com/riscv/riscv-sbi-doc
The RISC-V OpenSBI project aims to provides an open-source and extensible implementation of the SBI spec. This project can be easily extended by RISC-V platform or RISC-V System-on-Chip vendors.
How to Build?
Below are the steps to cross-compile and install RISC-V OpenSBI:
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Setup build environment $ CROSS_COMPILE=riscv64-unknown-linux-gnu-
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Build sources $ make PLAT=<platform_name> OR $ make PLAT=<platform_name> O=<build_directory>
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Install blobs $ make PLAT=<platform_name> install OR $ make PLAT=<platform_name> I=<install_directory> install