[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e
Hi guys,
I'm new to the list, but I though it would be a good place to find out some help.
I'm looking for some "recent" documentation for U-boot for the rpxlite project. I've been trying to understand the doc, but the readme is based on the old project (ppcboot-0.8.1) and the date is 29-01-2001. I'm working with a crosscompiler and I'm not able to compile an executable binary. (The cross-compiler is the cross-tools from timesys, I also tried powerpc-eabi (p.o.m.p. tools suit) and it did'nt work either.)
I know the crosscompiler works, because I've compiled busybox and a kernel and they both work great. Now my goal is to stop using the nfsmount (timesys default) and boot from the flash (probably with an initrd image).
If anyone has some doc or a link to it, a few hints would be greatly appreciated.
PS: sorry for my bad english, it's not my first/main language.
Raphael
Dear Raphael,
in message 200408132105.25912.ccool@ninjatech.biz you wrote:
I'm looking for some "recent" documentation for U-boot for the rpxlite project. I've been trying to understand the doc, but the readme is based on
There is no "rpxlite project".
the old project (ppcboot-0.8.1) and the date is 29-01-2001. I'm working
So what? If you think that parts of this documentation are wrong or obsolete please point them out in detail.
with a crosscompiler and I'm not able to compile an executable binary. (The cross-compiler is the cross-tools from timesys, I also tried powerpc-eabi (p.o.m.p. tools suit) and it did'nt work either.)
I know neither of these, but it seems everybody else hase no problems compiling the code. We're using the ELDK, and it workes without any problems.
I know the crosscompiler works, because I've compiled busybox and a kernel and
You did not bother to mention any specific error message you get when following the instructions.
It's impossible to help you without more (and better) information for you.
they both work great. Now my goal is to stop using the nfsmount (timesys default) and boot from the flash (probably with an initrd image).
What makes you think that this requires to recompile U-Boot?
Did you actually READ the available documentation, especially the DULG's sections about U-Boot's environment variables and how to employ these?
If anyone has some doc or a link to it, a few hints would be greatly appreciated.
RTFM. It's at http://www.denx.de/twiki/bin/view/DULG/Manual
Best regards,
Wolfgang Denk
There is no "rpxlite project".
Sorry I meant the RPXlite section in the U-boot project.
the old project (ppcboot-0.8.1) and the date is 29-01-2001. I'm working
So what? If you think that parts of this documentation are wrong or obsolete please point them out in detail.
I was talking about Readme file : "doc/README.RPXlite" file. I thought that the section 1 might be obsolete. With the documentation of my RPXlite, I have'nt found any VisionClick flash programmer.
About the documentation link you've sent me, I read everything except the ELDK section. I did compile a u-boot, u-boot.bin, and everything without any error messages. (Compiler used is 2.95.2, just in case). Before writing everything into the flash memory, I wanted to test it by loading it into the ram and execute the binary file. ( the same way I do when I want to run linux on the box, I load a kernel at 0040 0000, and then run the code starting at 0040 0000 or 0041 0000 (when the 64k ELF header is not stripped)). And as for the u-boot binaries, they do not want to run, and I get no error message, my RPXLite either reboot or freeze.
I also tried the u-boot.srec, just in case the S-record image would run better, but it did'nt. I guess that's why I'm looking for someone who could give me a few hints about how to run u-boot.
As I understand it (and maybe this is where my problem is) I am supposed to be able tu run u-boot's binary (or s-record image) directly from the ram. Now, this task seems impossible to me. I even tried to run the elf binary in the linux box that I have made (mounted via nfs) and it crashed (Segmentation fault error only)
I know these questions might sound "newbee" to you guys, but I really need to know if this code is suppose to work alone, without any kernel, or it absolutly need to work under linux (a bit like when you run lilo from a "normal-i386" linux box)
I thank you a lot for your time, this is really helpful. Like they say, the firsts steps are always the hardest and theses are my first in the embedded world...
Raphaël
Dear Raphaël,
in message 200408151527.48616.ccool@ninjatech.biz you wrote:
So what? If you think that parts of this documentation are wrong or obsolete please point them out in detail.
I was talking about Readme file : "doc/README.RPXlite" file. I thought that the section 1 might be obsolete. With the documentation of my RPXlite, I have'nt found any VisionClick flash programmer.
That doesn't mean that the documentationis obsolete. You can buy a Visio* Debugger if you like (*), but this is a complete separate product and has nothing to to with the RPXlite.
(*) IMHO your money is better spent if you buy a BDI2000 instead.
everything into the flash memory, I wanted to test it by loading it into the ram and execute the binary file. ( the same way I do when I want to run
This cannot be done easily (*), and if you read the mailing list archive you will find why.
(*) "Not easily" means that you cannot do it if you have to ask why it's not working or what needs to be done to get it working. And if you know these things, you will not do it because then you'll also understand that it doesn't allow you to perform the test you are looking for.
better, but it did'nt. I guess that's why I'm looking for someone who could give me a few hints about how to run u-boot.
This is writtenin the docs: burn it into flash, and reset the board.
As I understand it (and maybe this is where my problem is) I am supposed to be able tu run u-boot's binary (or s-record image) directly from the ram. Now,
No, you are NOT supposed to. There is not a single place in the docs which even faintly suggests this.
I know these questions might sound "newbee" to you guys, but I really need to
Just stick with the written documentation, and follow it verbatim; don't speculate.
know if this code is suppose to work alone, without any kernel, or it absolutly need to work under linux (a bit like when you run lilo from a "normal-i386" linux box)
You are confused. Running the "lilo" comand under Linux has nothing to do with running the "lilo" boot loader. These are totally different programs.
Best regards,
Wolfgang Denk
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Wolfgang Denk