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.. SPDX-License-Identifier: GPL-2.0+
Booting from eMMC using HSS
---------------------------
Building U-Boot
~~~~~~~~~~~~~~~
1. Add the RISC-V toolchain to your PATH.
2. Setup ARCH & cross compilation environment variable:
.. code-block:: none
export CROSS_COMPILE=<riscv64 toolchain prefix>
3. make microchip_mpfs_generic_defconfig
4. make
Flashing
~~~~~~~~
The current U-Boot port is supported in S-mode only and loaded from DRAM.
A prior stage M-mode firmware/bootloader (e.g HSS with OpenSBI) is required to
boot the u-boot.bin in S-mode.
Currently, the u-boot.bin is used as a payload of the HSS firmware (Microchip
boot-flow) and OpenSBI generic platform fw_payload.bin (with u-boot.bin embedded)
as HSS payload (Custom boot-flow)
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