forked from Mirrors/opensbi
892e87998c
- put all URLs at the end of the doc - satisfy the 80 character per line rule as much as possible Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
33 lines
1.7 KiB
Markdown
33 lines
1.7 KiB
Markdown
OpenSBI as coreboot payload
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===========================
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[coreboot] is a free/libre and open source firmware platform support multiple
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hardware architectures(x86, ARMv7, arm64, PowerPC64, MIPS and RISC-V) and
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diverse hardware models. In RISC-V world, coreboot currently support HiFive
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Unleashed with OpenSBI as a payload to boot GNU/Linux:
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```
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SiFive HiFive unleashed's original firmware boot process:
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+-----------+
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+------+ +------+ +------+ | BBL |
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| MSEL |--->| ZSBL |--->| FSBL |--->| +-------+
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+------+ +------+ +------+ | | linux |
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+---+-------+
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coreboot boot process:
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+---------------------------------------------------------------------+
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| coreboot |
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+------+ +------+ | +-----------+ +----------+ +----------+ +-----------------------+
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| MSEL |-->| ZSBL |-->| | bootblock |->| romstage |->| ramstage |->| payload ( OpenSBI) |
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+------+ +------+ | +-----------+ +----------+ +----------+ | +-------+ |
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| | | linux | |
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+---------------------------------------------+-------------+-------+-+
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```
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The upstreaming work is still in progress. There's a [documentation] about how
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to build [out-of-tree code] to load OpenSBI.
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[coreboot]: https://www.coreboot.org/
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[documentation]: https://github.com/hardenedlinux/embedded-iot_profile/blob/master/docs/riscv/hifiveunleashed_coreboot_notes-en.md
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[out-of-tree code]: https://github.com/hardenedlinux/coreboot-HiFiveUnleashed
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