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From: "Andrew Fish via groups.io" <afish=apple.com@groups.io>
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Subject: Re: [edk2-devel] Is there a way to create filesystem in UEFI Shell ?
Date: Fri, 29 Mar 2024 15:10:36 -0700
References: <QxQh.1711700498925714243.bpxd@groups.io>
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MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskDxe.inf is a virtual storage =
device, so it just emulates an unformatted disk. You would need to partitio=
n or initialize the file system given you have a RAM disk.=20
The file system driver lives here: https://github.com/tianocore/edk2/tree/m=
aster/FatPkg/EnhancedFatDxe
The ArmPkg has a driver that lets you do a file system over JTAG: https://g=
ithub.com/tianocore/edk2/blob/master/ArmPkg/Filesystem/SemihostFs/Arm/
You can make a ReadOnly file system out of contents on an FV (Firmware Volu=
me): https://github.com/tianocore/edk2/tree/master/MdeModulePkg/Universal/F=
vSimpleFileSystemDxe
FV is defined in the PI Spec as a layout for flash that contains files, but=
no directories.=20
Thanks,
Andrew Fish
> On Mar 29, 2024, at 1:21=E2=80=AFAM, John Chew <yuinyee.chew@starfivetech=
.com> wrote:
>=20
>=20
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=
=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; -webkit-nbsp-mod=
e: space; line-break: after-white-space;">MdeModulePkg/Universal/Disk/RamDi=
skDxe/RamDiskDxe.inf is a virtual storage device, so it just emulates an un=
formatted disk. You would need to partition or initialize the file system g=
iven you have a RAM disk. <div><br></div><div>The file system driver l=
ives here: <a href=3D"https://github.com/tianocore/edk2/tree/master/Fa=
tPkg/EnhancedFatDxe">https://github.com/tianocore/edk2/tree/master/FatPkg/E=
nhancedFatDxe</a></div><div><br></div><div></div><div>The ArmPkg has a driv=
er that lets you do a file system over JTAG: <a href=3D"https://github=
.com/tianocore/edk2/blob/master/ArmPkg/Filesystem/SemihostFs/Arm/">https://=
github.com/tianocore/edk2/blob/master/ArmPkg/Filesystem/SemihostFs/Arm/</a>=
</div><div><br></div><div>You can make a ReadOnly file system out of conten=
ts on an FV (Firmware Volume): <a href=3D"https://github.com/tianocore=
/edk2/tree/master/MdeModulePkg/Universal/FvSimpleFileSystemDxe">https://git=
hub.com/tianocore/edk2/tree/master/MdeModulePkg/Universal/FvSimpleFileSyste=
mDxe</a></div><div>FV is defined in the PI Spec as a layout for flash that =
contains files, but no directories. <br><div><br></div><div>Thanks,</d=
iv><div><br></div><div>Andrew Fish</div><div><div><br><blockquote type=3D"c=
ite"><div>On Mar 29, 2024, at 1:21=E2=80=AFAM, John Chew <yuinyee.chew@s=
tarfivetech.com> wrote:</div><br class=3D"Apple-interchange-newline"><di=
v><img src=3D"cid:attach_0_17C12E88E9BAF705_29633@groups.io" alt=3D"" width=
=3D"469" height=3D"366" style=3D"caret-color: rgb(0, 0, 0); font-family: He=
lvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; fo=
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; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-tex=
t-stroke-width: 0px; text-decoration: none;"></div></blockquote></div><br><=
/div></div></body></html>
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