Re: [edk2-devel] [PATCH v3 2/8] Sophgo/SG2042Pkg: Add PlatformUpdateMmuDxe module.

["Sunil V L" <sunilvl@ventanamicro.com>]

On Thu, Sep 07, 2023 at 06:25:45PM +0800, caiyuqing_hz@163.com wrote:
> From: caiyuqing379 <202235273@mail.sdu.edu.cn>
> 
> SG2042 (Xuantie C920) MMU can be enabled in SV39 mode. C920 has five
> customizable page properties that control whether the page is Strong
> order(SO), Cacheable(C), Bufferable(B), Shareable(SH), Trustable(Sec).
> This driver modifies the page table attributes to avoid exceptions
> based on the memory attributes of the C920.
> 
> Introduces a PCD variable PcdForceNoMMU to disable MMU configuration.
> Currently, enabling MMU results in a timeout for reading data blocks
> from the SD card.
> 
> 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>
> ---
Acked-by: Sunil V L <sunilvl@ventanamicro.com>


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