Re: Sequoia build with KDBG

[Steve Heflin <sheflin@newagemicro.com>]

At 05:51 PM 2/29/2008, you wrote:
>On Fri, 29 Feb 2008 17:31:10 -0500
>Steve Heflin <sheflin@newagemicro.com> wrote:
>
> > At 04:35 PM 2/29/2008, Josh Boyer wrote:
> > >On Fri, 29 Feb 2008 16:34:09 -0500
> > >Steve Heflin <sheflin@newagemicro.com> wrote:
> > >
> > > > I attempted to enable the kernel debugger on my Sequoia board, and I
> > > > get build errors:
> > > >   /linux-2.6.25-rc3/arch/powerpc/kernel/setup_32.c:254: undefined
> > > > reference to `set_debug_traps'
> > > >   /linux-2.6.25-rc3/arch/powerpc/kernel/setup_32.c:259: undefined
> > > > reference to `breakpoint'
> > > >
> > > > Josh: I assume you have used the kernel debugger with your 44x
> > > > boards, how did you build it?
> > >
> > >Why would you assume that?  I've never used kgdb on arch/powerpc
> > >kernels, nor have I ever tried to build it.
> >
> > I assumed that because I've always needed a debugger when
> > implementing kernel level components. Since you've implemented kernel
> > level support for several 44x processors, I just assumed that you
> > needed kdbg at some point. So you're saying that your additions
>
>Nope.  I did the poor man's method of manually poking characters out of
>the serial port.
>
> > worked right out of the gate and you never needed a 
> debugger?  You're my hero!
>
>I largely stood on the shoulders of those that came before me.  Porting
>has become trivial lately, mostly due to the collective work lots of
>people have put in.
>
>That all being said, I'm not opposed to having kgdb work on 4xx.  I
>just have never personally looked at it yet.  Patches welcome :).
>
>josh

poor man's debugging works fine if a serial port is available, but my 
Sequoia platform doesn't get that far!  I use u-boot to download and 
boot my image, and I don't get any serial output after the boot completes:

=> bootm 0x500000
## Booting image at 00500000 ...
    Image Name:   Kernel and Ramdisk
    Created:      2008-03-01   0:09:57 UTC
    Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
    Data Size:    2430248 Bytes =  2.3 MB
    Load Address: 00000000
    Entry Point:  00000000
    Contents:
    Image 0:  1471523 Bytes =  1.4 MB
    Image 1:   958712 Bytes = 936.2 kB
    Verifying Checksum ... OK
    Uncompressing Multi-File Image ... OK
    Loading Ramdisk to 07e42000, end 07f2c0f8 ... OK
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console port is now dead.
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