Re: regarding boot.bib and config.bib
From: Peter (peter_at_nospam.com)
Date: 10/28/04
- Next message: Radha Kumar Reddy: "unable to boot cepc from HD"
- Previous message: Lee: "Installing Platform Builder"
- In reply to: Sujith: "Re: regarding boot.bib and config.bib"
- Next in thread: Sujith: "Re: regarding boot.bib and config.bib"
- Reply: Sujith: "Re: regarding boot.bib and config.bib"
- Messages sorted by: [ date ] [ thread ]
Date: Thu, 28 Oct 2004 08:53:10 -0700
Thanks for your reply.
I like to clarify some more.
If you see the boot.bib of Lubbock it is using 0x8000 0000 --> as you said
if it is a physical memory, in PXA255 this memory is reserved does not
belongs to any Chip Select. Then, here how come one can use Physical
memory????? really, it may be a trivial question too?
thanks & regards,
Peter
"Sujith" wrote:
> Hi,
> Today I just have gone through the code, for some reference and this is what
> I understood.
>
> the address you have to use is physical address only. because, it
> bootloaders normally works in physical address only, not virtual address.
>
> as you said, you are able to download atleast 300 packets, that is proved.
> now, why it is failing after that, you have to find out!
> one possible option is that, the kernel is overwriting the bootloader area.
> check your boot.bib and config.bib. check your ROMOFFSET where it tries to
> load the NK.BIN.
>
> possibly this could be the problem.
>
> > Which address I need to specify in boot.bib? Physical / Virtual?
> physical.
> > boot.bib I need to give Flash address OR SDRAM Address?
> it depends on the type of build. if you are building for Flash it should be
> flash or else RAM
> > Is nk.bin configuration in config.bib should follow eboot configuration in
> > boot.bib? for SDRAM Image?
> certainly not. because, the configuration files in config.bib all should be
> virtual and boot.bib is physical ! :-)
>
> Best of Luck
>
> Regards
> Sujith
>
> "Peter" <peter@nospam.com> wrote in message
> news:DBB623F2-3624-405C-AD4E-74BDE02930E8@microsoft.com...
> > Hi,
> > i am porting Lubbock BSP, for a hardware made with reference to Accelent.
> > Now, i am in the process of downloading the OS nk.bin through Ethernet.
> >
> > I saw boot.bib and config.bib in Lubbock BSP, in that boot.bib and
> > config.bib is using virtual memory for the definitions. Am i right?
> >
> > But, when i use 0xA000 0000 i-e my SDRAM Physical address. My bootloader
> > atleast initiating the download process and disconnecting after 300 TFTP
> > Pakcets.
> > config.bib i am using lubbock's configuration.
> >
> > When i change the boot.bib to 0x8000000 i-e virtual address of SDRAM i am
> > not able start download itself. PB is able to detect the target but it's
> not
> > starting the download. Target is keep sending BOOTME packet.
> >
> > Here are my question:
> >
> > Which address i need to sepcify in boot.bib? Physical / Virtual?
> > boot.bib i need to give Flash address OR SDRAM Address?
> > Is nk.bin configuration in config.bib should follow eboot configuration in
> > boot.bib? for SDRAM Image?
> >
> > Please suggest.
> >
> > Thanks & regards,
> > Peter
> >
> >
>
>
>
- Next message: Radha Kumar Reddy: "unable to boot cepc from HD"
- Previous message: Lee: "Installing Platform Builder"
- In reply to: Sujith: "Re: regarding boot.bib and config.bib"
- Next in thread: Sujith: "Re: regarding boot.bib and config.bib"
- Reply: Sujith: "Re: regarding boot.bib and config.bib"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
|
