On Thu, Sep 07, 2023 at 06:25:43PM +0800, caiyuqing...@163.com wrote:
> From: caiyuqing379 <202235...@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 <202235...@mail.sdu.edu.cn>
> Co-authored-by: USER0FISH <libing1...@outlook.com>
> Cc: dahogn <dah...@hotmail.com>
> Cc: meng-cz <mengcz1...@gmail.com>
> Cc: yli147 <yong...@intel.com>
> Cc: ChaiEvan <evan.c...@intel.com>
> Cc: Sunil V L <suni...@ventanamicro.com>
> Cc: Leif Lindholm <quic_llind...@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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