[U-Boot-Users] does someone add YAFFS2 support in uboot? - U-Boot - denx.biz

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[U-Boot-Users] does someone add YAFFS2 support in uboot?

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zhuzhenhua

6 Mar 2006 6 Mar '06

3:45 a.m.

i want to boot the kernel under the dir /boot/ of a yaffs2 filesystem, does someone succeed on it? thanks for any hints. Best Regards

zhuzhenhua

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Wolfgang Denk

6 Mar 6 Mar

7:39 a.m.

In message 50c9a2250603051845v6fe64015g6229f6d065cc0202@mail.gmail.com you wrote:

i want to boot the kernel under the dir /boot/ of a yaffs2 filesystem,

May I ask why you want to do this? I don't see any advantages of such an approach.

Best regards,

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "Data is a lot like humans: It is born. Matures. Gets married to other data, divorced. Gets old. One thing that it doesn't do is die. It has to be killed." - Arthur Miller

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Aubrey

10:06 a.m.

Yes, Putting the kernel image in the filesystem is not a wise approach. You will encounter some problems like power failure, etc. Since U-Boot supports NAND driver to read/write the NAND flash, you can boot kernel from a sperate partition by U-Boot.

Thanks, -Aubrey

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zhuzhenhua

12:08 p.m.

On 3/6/06, Aubrey aubreylee@gmail.com wrote:

Yes, Putting the kernel image in the filesystem is not a wise approach. You will encounter some problems like power failure, etc. Since U-Boot supports NAND driver to read/write the NAND flash, you can boot kernel from a sperate partition by U-Boot.

Thanks, -Aubrey

if put the kernel in a sperate partition, i think it may waste some space, because you must keep the partition larger than the size of kernel.

Best Regards zhuzhenhua

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Wolfgang Denk

12:51 p.m.

In message 50c9a2250603060308t3f7e4c35w37ed5362f9b8006e@mail.gmail.com you wrote:

if put the kernel in a sperate partition, i think it may waste some space, because you must keep the partition larger than the size of kernel.

Yes, you may lose a few 100 kB. But you get a lot of additionally flexibility (like being able to update kernel and root file system independently from each other). And if your system does not allow for 100 or 200 kB now when you start designing the system you have MAJOR problems anyway as your application software will need MUCH more reserve.

Best regards,

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Just about every computer on the market today runs Unix, except the Mac (and nobody cares about it). - Bill Joy 6/21/85

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zhuzhenhua

12:15 p.m.

On 3/6/06, Aubrey aubreylee@gmail.com wrote:

Yes, Putting the kernel image in the filesystem is not a wise approach. You will encounter some problems like power failure, etc. Since U-Boot supports NAND driver to read/write the NAND flash, you can boot kernel from a sperate partition by U-Boot.

Thanks, -Aubrey

what does the "power failure" means? i think it has no difference between boot from partition and yaffs, maybe boot from yaffs need more time. do i miss something else?

Thanks zhuzhenhua

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Aubrey
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zhuzhenhua