taiga/7448 questions

[Leisner, Martin]

OK, I built 2.6.20.11 and 2.6.21.1 for taiga...with the supplied config 
(and I didn't know about the dtc for powerpc until I booted and nothing
happened).
I changed a few things (like /proc/config.gz)

A few issues I've seen:

1) after we start booting, the console turns off until the login message
appears:

taiga login: [    0.000000] Zone PFN ranges:
000000]   Normal     131072 ->   131072
[    0.000000] early_node_map[1] active PFN ranges
[    0.000000]     0:        0 ->   131072
[    0.000000] Built 1 zonelists.  Total pages: 130048
[    0.000000] Kernel command line: root=/dev/sda2 console=ttyS0,11520
[    0.000000] mpic: Setting up MPIC "Tsi108_PIC" version 1.2 at
c0007400, max 4 CPUs
[    0.000000] mpic: ISU size: 24, shift: 5, mask: 1f
[    0.000000] mpic: Initializing for 24 sources
[    0.000000] PID hash table entries: 2048 (order: 11, 8192 bytes)



Linux System
Kernel 2.6.21.1 on an ppc
Version: #2 Thu May 24 14:37:53 EDT 2007

This is consistent on 2.6.20.11 and 2.6.21.1...

2) Does "reboot" work?  Even when I do a <sysrq-magic-b> it doesn't want
to boot
until I do a hardware reset....

3) It seems 2.6.21.1 consistently works, 2.6.20.11 sometimes hangs (and
since I can't see the
console, I don't know what's hanging and why)


4) The dtb strategy seems to a little clumsy...is there a way to embed a
default dtc into a kernel
(so if you just tftp one file, something happens?)  I like the ability
to do fewer operations (i.e.
initramfs embedded in the image) -- I like reducing steps into of
increasing them...
Is there a way to tell the kernel "use a default dtb if you don't have
one better?"

marty