RE: [U-Boot-Users] Download of kernel Image through Serial Line.
Hi.
- What are the minima requests in terms of memory to run Linux ?
- Minimum Ram Size
- Minimum Flash Size if I don't use NFS ( full embeded application )
That depends on your hardware and software. Define "full embedded application". With 4MB RAM you can get started. Depending on what you need in the kernel (networking, for instance) this can become a little bit tight quickly.
Well my application shouldn't be very big and I don't really need a lot of features of Linux so if it works with 4Mb for a "light" Linux it should be ok. When I speak of "full embedded application" I mean that won't have NFS to store the filesystem. So if I understood correctly I will have to flash my linux image and the filesystem. So I need to have an idea of the size necessary to store a filesystem and a linux image in Flash...
Thanks
Chris
On Wed, 29 Jan 2003 Christophe.LINDHEIMER@fr.thalesgroup.com wrote:
Well my application shouldn't be very big and I don't really need a lot of features of Linux so if it works with 4Mb for a "light" Linux it should be ok. When I speak of "full embedded application" I mean that won't have NFS to store the filesystem. So if I understood correctly I will have to flash my linux image and the filesystem. So I need to have an idea of the size necessary to store a filesystem and a linux image in Flash...
The smallest demo we have in our ElinOS Distribution has a ROM footprint of less than 256KB. Of course that is a _very_ _simple_ system. You should calculate with 512KB-1MB.
Regards Marius
----------------------------------------------------------------------------- Marius Groeger SYSGO Real-Time Solutions AG mgroeger@sysgo.de Software Engineering Embedded and Real-Time Software www.sysgo.de Voice: +49-6136-9948-0 Am Pfaffenstein 14 www.osek.de FAX: +49-6136-9948-10 55270 Klein-Winternheim, Germany www.elinos.com
Hi,
I may be want to try to put U-Boot with a Embedded Linux on a custom MPC860 (33Mhz) board of course with Network (10 Mbps) ( 2MB ROM, 8 ou 16 MB of Flash, 4 MB of DRAM for the system, 16 MB of SRAM for the application )
So for U-Boot and Linux, I want to allow only the DRAM and a part of the flash ( example : 8 MB )
Is it possible to have U-Boot and the kernel linux in the prom without decompress the kernel in RAM ? Flash will be ok for the filesystem and my application. The SRAM should be use for my application Data Base.
Is it enought with network support ?
Thanks
Cedric
-----Message d'origine----- De : u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]De la part de Marius Groeger Envoye : mercredi 29 janvier 2003 11:25 A : Christophe.LINDHEIMER@fr.thalesgroup.com Cc : u-boot-users@lists.sourceforge.net Objet : RE: [U-Boot-Users] Download of kernel Image through Serial Line.
On Wed, 29 Jan 2003 Christophe.LINDHEIMER@fr.thalesgroup.com wrote:
Well my application shouldn't be very big and I don't really need a lot of features of Linux so if it works with 4Mb for a "light" Linux it should be ok. When I speak of "full embedded application" I mean that won't have NFS to store the filesystem. So if I understood correctly I will have to flash my linux image and the filesystem. So I need to have an idea of the size necessary to store a filesystem and a linux image in Flash...
The smallest demo we have in our ElinOS Distribution has a ROM footprint of less than 256KB. Of course that is a _very_ _simple_ system. You should calculate with 512KB-1MB.
Regards Marius
---------------------------------------------------------------------------- - Marius Groeger SYSGO Real-Time Solutions AG mgroeger@sysgo.de Software Engineering Embedded and Real-Time Software www.sysgo.de Voice: +49-6136-9948-0 Am Pfaffenstein 14 www.osek.de FAX: +49-6136-9948-10 55270 Klein-Winternheim, Germany www.elinos.com
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In message NEEAIENMOLHNBKKFKIDMAEBFCAAA.cedric_aubert@softhome.net you wrote:
Is it possible to have U-Boot and the kernel linux in the prom without decompress the kernel in RAM ? Flash will be ok for the
You _can_ run the Linux kernel from ROM; we have implemented and tested XIP (execute in place) for a couple of systems, including PPC. However, the advantages are not what you might expect.
filesystem and my application. The SRAM should be use for my application Data Base.
Linux will always need system memory in RAM.
Viele Grüße,
Wolfgang Denk
participants (4)
-
AUBERT Cedric -
Christophe.LINDHEIMER＠fr.thalesgroup.com -
Marius Groeger -
Wolfgang Denk