[ECOS] Why the application run on redboot uncorrectly?

[Chris Garry]

----- Original Message ----- 
From: "xie boyan" <xieboyan@hotmail.com>
To: <ecos-discuss@sources.redhat.com>
Sent: Thursday, November 27, 2003 1:53 AM
Subject: Re: [ECOS] Why the application run on redboot uncorrectly?


> 
> > > > I download the hello elf file by using command:
> > > >     load -v -h MyHost -m tftp /tftpboot/hello
> > > > and it failed by displaying "Abort! Attempt to load ELF data to 
> address:
> > > > 0x00020000 which
> > > > is not  in RAM."
> > >
> > > A little logical thinking is required. "is not in RAM" probably means
> > > its trying to load it into ROM. So you have probably built a ROM
> > > app. Try building a RAM application.
> > >
> > >      Andrew
> >
> >But for the snds platform if nothing is changed 0x20000 is RAM. It should
> >be right.
> >
> >Maybe RedBoot is a RAM version?
> >
> >Roland
> 
> Hi, Roland
> 
> My RedBoot is exactly the ROM version and my application is definitely the 
> RAM version. I have read some earlier archives in mailing list, the same 
> issue occured but it seems not have a final answer.
> This especially seems to be a problem of snds eval board, mybe you can find 
> out some bugs in the redboot source in the package?
> 
> I've tried to enforce the base=0x300000 in the entry of function 
> load_elf_image() whithin the source file load.c in the redboot source 
> directory, and the command
>       RedBoot> load -v -h MyHost_IP -m tftp /tftpboot/hello
> works out. It looks all right because of the screen messages are OK, 
> especially the memory size which contain the downloaded elf codes exactly 
> equal to the original elf file size in host. I think this means that the 
> source of redboot has at least a load base address bug.
> 
> The first problem, i.e. the elf load, has been resolved by temporarily 
> enforcing base=0x300000, but another problem comes up. When I do "GO" 
> command, the application hello still does not say "Hello !".
> 

The "Abort! Attempt to load ELF data to address: 0x00020000 which
is not in RAM." message will also be seen when you try to load an
image into RAM that RedBoot is already using.

What RAM does RedBoot report as 'available' when it first runs?

Chris




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