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41 lines
1.4 KiB
Markdown
41 lines
1.4 KiB
Markdown
RISC-V Proxy Kernel and Boot Loader
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=====================================
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About
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---------
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The RISC-V Proxy Kernel, `pk`, is a lightweight application execution
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environment that can host statically-linked RISC-V ELF binaries. It is
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designed to support tethered RISC-V implementations with limited I/O
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capability and and thus handles I/O-related system calls by proxying them to
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a host computer.
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This package also contains the Berkeley Boot Loader, `bbl`, which is a
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supervisor execution environment for tethered RISC-V systems. It is
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designed to host the RISC-V Linux port.
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Build Steps
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---------------
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We assume that the RISCV environment variable is set to the RISC-V tools
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install path, and that the riscv-gnu-toolchain package is installed.
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Please note that building the binaries directly inside the source
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directory is not supported; you need to use a separate build directory.
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$ mkdir build
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$ cd build
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$ ../configure --prefix=$RISCV --host=riscv64-unknown-elf
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$ make
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$ make install
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Alternatively, the GNU/Linux toolchain may be used to build this package,
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by setting `--host=riscv64-unknown-linux-gnu`.
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By default, 64-bit (RV64) versions of `pk` and `bbl` are built. To
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built 32-bit (RV32) versions, supply a `--enable-32bit` flag to the
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configure command.
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The `install` step installs 64-bit build products into
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`$RISCV/riscv64-unknown-elf`, and 32-bit versions into
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`$RISCV/riscv32-unknown-elf`.
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