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OpenSBI payloads and u-boot options #504

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OpenSBI payloads and u-boot options #504

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3ca318c
opensbi: support providing explicit fw payloads
heshamelmatary Jun 17, 2026
84af567
Add a new cheri-std093-opensbi target with u-boot as fw payload
heshamelmatary Jun 17, 2026
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24 changes: 24 additions & 0 deletions pycheribuild/projects/cross/opensbi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
#
from pathlib import Path

from .u_boot import BuildCheriAllianceUBoot
from ..build_qemu import BuildCheriAllianceQEMU, BuildQEMU
from ..project import (
BuildType,
Expand Down Expand Up @@ -83,6 +84,9 @@ def setup_config_options(cls, **kwargs) -> None:
cls.fw_jump_fdt_addr = cls.add_optional_config_option(
"fw-jump-fdt-addr", kind=str, help="OpenSBI FW_JUMP_FDT_ADDR"
)
cls.fw_payload_path = cls.add_optional_config_option(
"fw-payload-path", kind=Path, help="OpenSBI FW_PAYLOAD_PATH"
)

def check_system_dependencies(self) -> None:
super().check_system_dependencies()
Expand Down Expand Up @@ -117,6 +121,9 @@ def setup(self):
self.make_args.set(FW_JUMP_ADDR=self.fw_jump_addr)
if self.fw_jump_fdt_addr:
self.make_args.set(FW_JUMP_FDT_ADDR=self.fw_jump_fdt_addr)
if self.fw_payload_path:
assert self.fw_payload_path.exists()
self.make_args.set(FW_PAYLOAD_PATH=self.fw_payload_path)
if self.config.verbose:
self.make_args.set(V=True)

Expand Down Expand Up @@ -293,3 +300,20 @@ class BuildAllianceOpenSBIGFE(BuildAllianceOpenSBI):
def setup(self):
super().setup()
self.make_args.set(FW_TEXT_START="0xC0000000")


class BuildAllianceOpenSBIWithUBoot(BuildAllianceOpenSBI):
target = "cheri-std093-opensbi-u-boot"
_supported_architectures = (
CompilationTargets.FREESTANDING_RISCV64,
CompilationTargets.FREESTANDING_RISCV64_PURECAP_093,
)

@classmethod
def dependencies(cls, config: CheriConfig) -> "tuple[str, ...]":
return *super().dependencies(config), "cheri-std093-u-boot"

def setup(self):
super().setup()
uboot = BuildCheriAllianceUBoot.get_install_dir(self)
self.make_args.set(FW_PAYLOAD_PATH=uboot / "u-boot.bin")
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