On Thu, Sep 07, 2023 at 06:25:43PM +0800, caiyuqing_hz@163.com wrote:
> From: caiyuqing379 <202235273@mail.sdu.edu.cn>
>
> Description:
> Deploy EDK2 to run on 64-core CPU under RISC-V architecture, and successfully boot to OS.
> Implementation can be found on https://github.com/AII-SDU/edk2-platforms/tree/devel-Sophgo/SG2042Pkg/Platform/Sophgo.
>
> Current progress and status:
> 1.Adopted the scheme of separating OpenSBI and EDK2. It follows PEI less design.
> 2.The startup process is roughly: ZSBL + FSBL + OpenSBI + EDK2 + GRUB + Linux OS.
> The boot medium is SD card, where ZSBL is loaded and executed by an auxiliary MCU, performing initial initialization
> operations such as DIMM initialization. FSBL then continues with further initialization tasks. OpenSBI is used to
> initialize the hardware platform and kernel. Additionally, we have upgraded the OpenSBI from version V0.9 to V1.2 to
> align with community progress. EDK2, running in S-mode, handles configuration operations, primarily completing the
> SD card driver in the DXE stage, while PCIe driver testing and follow-up work are planned. GRUB2 is used to load the
> operating system, facilitating subsequent operations.
>
> Testing:
> 1.Test the project on Sophgo SG2042 EVB and be able to launch Linux OS
> 2.Test the project on Milk V Pioneer board and is able to boot into the UEFI shell.
> However, the SD card driver could not correctly recognize all partitions and start Linux OS.
>
> Current limitation:
> 1.PCIE driver is not currently supported.
> 2.MMU support
> SG2042 (Xuantie C920) MMU can be enabled in SV39 mode. Introduce the PCD variable
> PcdForceNoMMU to disable MMU configuration. Currently, enabling MMU results in a
> timeout for reading data blocks from the SD card, So MMU is disabled by default.
> 3.Clang toolchain support
> Build the port using the CLANGDWARF toolchain (clang version 18.0.0). It is able
> to build successfully but the compiled binary was not fully work.
>
Please add patch revision history which helps reviewers to understand
what has changed compared to previous version of the series.
> Signed-off-by: caiyuqing379 <202235273@mail.sdu.edu.cn>
> Co-authored-by: USER0FISH <libing1202@outlook.com>
> Cc: dahogn <dahogn@hotmail.com>
> Cc: meng-cz <mengcz1126@gmail.com>
> Cc: yli147 <yong.li@intel.com>
> Cc: ChaiEvan <evan.chai@intel.com>
> Cc: Sunil V L <sunilvl@ventanamicro.com>
> Cc: Leif Lindholm <quic_llindhol@quicinc.com>
>
As per Maintainers.txt, Leif and Mike are high level maintainers for
edk2-platforms. Please CC both in future.
Thanks,
Sunil
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