Michael Brown ecac4a34c7 [lkrn] Add basic support for the RISC-V Linux kernel image format ...

The RISC-V and AArch64 bare-metal kernel images share a common header
format, and require essentially the same execution environment: loaded
close to the start of RAM, entered with paging disabled, and passed a
pointer to a flattened device tree that describes the hardware and any
boot arguments.

Implement basic support for executing bare-metal RISC-V and AArch64
kernel images.  The (trivial) AArch64-specific code path is untested
since we do not yet have the ability to build for any bare-metal
AArch64 platforms.  Constructing and passing an initramfs image is not
yet supported.

Rename the IMAGE_BZIMAGE build configuration option to IMAGE_LKRN,
since "bzImage" is specific to x86.  To retain backwards compatibility
with existing local build configurations, we leave IMAGE_BZIMAGE as
the enabled option in config/default/pcbios.h and treat IMAGE_LKRN as
a synonym for IMAGE_BZIMAGE when building for x86 BIOS.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

2025-05-20 13:08:38 +01:00

322 B

Raw Blame History

View Raw