Re: need help physical memory eboot

From: voidcoder (voidcoder_at_yahoo.com)
Date: 12/29/04 

Date: Wed, 29 Dec 2004 11:37:04 +0100

Ok, then it should be something around addressing.
Are You sure that image is loaded at right RAM
address (pls verify with Your config.bib). Also
pls verify that You jumping to the right address of
KernelStart. For example (just to chek it)
You can try to calculate address manually.

eg.

; Jump to KernelStart

ADD r0, pc, #OEMAddressTable-(.+8)
LDR r1, =KernelStart
LDR r2, =0x80000000 ; RAM base virtual
SUB r1, r1, r2
LDR r2, =0xA0000000 ; RAM base physical
ADD r1, r1, r2

MOV lr, r1

IF Interworking :LOR: Thumbing
    bx lr
ELSE
   mov pc, lr
ENDIF

Pls try it.

"Peter" <arockiarajeshpeter_at_harita_dot_com> wrote in message
news:E6EFE5E4-5273-4F94-A8A1-CABDCB8EBFF6@microsoft.com...
> Thanks.
> In my Virtual Eboot itself i am not passing OEMaddressTable address to
> kernelstart. But, jumping and woking fine. really, i couldn't find the
> reason, (I'm using Lubbock code)
>
> Even, i tired to pass OEMAddressTable address in r0 register before moving
> the KernelEntry address in to my program counter...not getting called.
>
> Peter
>
> "voidcoder" wrote:
>
> > Probably you forgot to pass pointer to OEMAddressTable
> > while calling KernelStart. Please chek it.
> >
> >
> > "Peter" <arockiarajeshpeter_at_harita_dot_com> wrote in message
> > news:014301A9-8565-4083-9862-F54718C2231F@microsoft.com...
> > > Hi,
> > >
> > > I am using PXA255, Lubbock BSP, WinCE 4.2.
> > >
> > > I'm able to download the OS image using my Physical memory Eboot.
> > > But, eboot is not jumping to the kernel start. The same code is
working
> > fine
> > > for Jumping to OS kernel using Virtaul memory.
> > >
> > > I just modified the respective address from virtual to physical
memory.
> > > Then, I tested i could reach the Launch () function and from there i
am
> > not
> > > able to jump to the KernelStart().
> > >
> > > Is any other thing i need to take care while convertig a Virtual Eboot
o
> > > Physical Eboot?
> > >
> > > Please help me out.
> > >
> > > Thanks & Regards,
> > > Peter
> >
> >
> >