From: "Andrew Fish via groups.io" <afish=apple.com@groups.io>
To: edk2-devel-groups-io <devel@edk2.groups.io>,
yuinyee.chew@starfivetech.com
Cc: Yoshinoya <yoshinoyatoko@163.com>
Subject: Re: [edk2-devel] Is there a way to create filesystem in UEFI Shell ?
Date: Wed, 17 Apr 2024 13:30:40 -0700 [thread overview]
Message-ID: <DEE010F4-07D5-4D93-95EE-BB791FCB707B@apple.com> (raw)
In-Reply-To: <30325.1712200260725716779@groups.io>
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FYI you can have much larger files in the newer version of the filesystem. See EFI_COMMON_SECTION_HEADER2
https://uefi.org/specs/PI/1.8A/V3_Code_Definitions.html#firmware-file-system
https://uefi.org/specs/PI/1.8A/V3_Code_Definitions.html#firmware-file-section
Thanks,
Andrew Fish
> On Apr 3, 2024, at 8:11 PM, John Chew <yuinyee.chew@starfivetech.com> wrote:
>
> On Wed, Apr 3, 2024 at 03:48 PM, Yoshinoya wrote:
> Maybe ref to ramdisk sample, create a memory type block io device, then mount file system on it.
> UEFI supports fat file system, some 3rd drivers could be added to support ext4 filesystem.
> Search them on github website
> Thanks Yoshinoya for your input. =)
>
>
> I have tried to compile the filesystem into my FD image as a separate FV. Then building FV HOB with it using "BuildFvHob".
>
> Next, using the "GetSectionFromAnyFv" to load the filesystem into buffer as follow:
>
> <dummyfile.0.part>
>
> Finally, create a disk with the filesystem buffer created earlier.
>
> <dummyfile.1.part>
>
> This works without having to create filesystem in EDK2. Instead loading it from somewhere else.
>
> However, this method has some limitations because the maximum size of each SECTION in FFS is only 16MB.
>
> <dummyfile.2.part>
>
> Thus, I still couldn't TFTP Linux (~25MB) into my filesystem "FS0:"
>
>
> My solution:
>
> <dummyfile.3.part> <dummyfile.4.part>
>
> 1. Allocate buffer
>
> 2. Populate the buffer by with100MB FAT16 header
>
> 3. Register virtual disk with the buffer
>
>
> I'm able to allocate 100MB of FAT16 filesystem and TFTP Linux successfully:
> <dummyfile.5.part>
>
> <dummyfile.6.part>
>
>
> Thanks everyone!!
>
> John
>
>
>
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next prev parent reply other threads:[~2024-04-17 20:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-29 8:21 [edk2-devel] Is there a way to create filesystem in UEFI Shell ? John Chew
2024-03-29 22:10 ` Andrew Fish via groups.io
2024-03-30 0:16 ` Michael D Kinney
2024-04-01 3:43 ` John Chew
2024-04-03 7:47 ` Yoshinoya
2024-04-03 12:27 ` Pedro Falcato
2024-04-04 3:11 ` John Chew
2024-04-17 10:42 ` charlleygreen.work
2024-04-17 20:30 ` Andrew Fish via groups.io [this message]
2024-04-01 3:39 ` John Chew
2024-04-01 15:07 ` Andrew Fish via groups.io
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