Hi Feng,
I have an embedded Linux system that currently uses eMMC storage and I am
looking at modifying it to use a simple raw NAND-Flash controller instead.
The current system stores BIOS in the eMMC boot-partition. The eMMC
user-partition has a GPT with partitions defined for EFI (Fat32), OS kernel
(raw), OS read-only filesystem (SquashFS), OS r/w filesystem (ext4). The idea
would be to move all of this onto a raw NAND device that is accessed via a raw
NAND controller.
Since the raw NAND controller is simple, software is needed to perform
wear-leveling, bad-block accounting, etc. which was previously done internally
to the eMMC device. I believe UBI can solve this by managing the raw NAND as
UBI volumes.
Ideally, I would also like UEFI to be able to read and write the EFI partition
for development purposes if nothing else. I believe that I would need an
additional software component to expose the UBI volume as a block device to
support FAT32. E.g., an FTL.
Brian
-Original Message-
From: Tian, Feng
Sent: Wednesday, October 07, 2015 8:03 PM
To: Welch, Brian J; edk2-devel@lists.01.org
Cc: Tian, Feng
Subject: RE: Support for UBI volumes and UBIFS?
Hi, Brian
As far as I know, there is no changes on that.
Could you introduce further about your usage model? FAT32 for the first
partition is not enough for boot?
Thanks
Feng
-Original Message-
From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Welch,
Brian J
Sent: Tuesday, October 06, 2015 23:46
To: edk2-devel@lists.01.org
Subject: [edk2] Support for UBI volumes and UBIFS?
Hi,
I searched the list and the most recent topic I found was 10-months-old and
said that no support for UBI/UBIFS was available at that time.
http://sourceforge.net/p/edk2/mailman/message/33144044/
That thread is similar to what I'm wanting to do, which is to have a raw flash
device for boot which ideally would contain an EFI partition and at least one
additional partition for the device's root filesystem.
I'm wondering if support/availability has changed since then.
Brian
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