Contents of /boot and /etc/yaboot.conf

[Chris Doherty <c_doherty@hotpop.com>]

Here's the yaboot.conf:

## yaboot.conf generated by debian-installer
##
## run: "man yaboot.conf" for details. Do not make changes until you have!!
## see also: /usr/share/doc/yaboot/examples for example configurations.
##
## For a dual-boot menu, add one or more of:
## bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ

boot=/dev/hda2
device=/pci@80000000/mac-io@10/ide@20000/disk@0:
partition=4
root=/dev/hda4
timeout=100
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
enablecdboot

image=/boot/vmlinux
        label=Linux
        read-only
        initrd=/boot/initrd.img

image=/boot/vmlinux.old
        label=old
        read-only
        initrd=/boot/initrd.img.old

And /boot.  Notice that there's no initrd.img symlink.  I thought there was earlier, but I was obviously mistaken.

drwxr-xr-x   2 root root    4096 2005-01-20 03:23 .
drwxr-xr-x  22 root root    4096 2004-12-16 01:07 ..
-rw-r--r--   1 root root   39983 2005-01-18 23:32 config-2.6.8-20050118
-rw-r--r--   1 root root   40069 2004-10-03 07:15 config-2.6.8-powerpc
-rw-r--r--   1 root root    1024 2004-10-28 13:46 first.b
-rw-r--r--   1 root root 4800512 2004-12-16 01:44 initrd.img-2.6.8-powerpc
lrwxrwxrwx   1 root root      24 2005-01-20 03:23 initrd.img.old -> initrd.img-2.6.8-powerpc
-rw-r--r--   1 root root   44336 2004-10-28 13:46 second.b
-rw-r--r--   1 root root  944303 2005-01-19 03:48 System.map-2.6.8-20050118
-rw-r--r--   1 root root  942649 2004-10-03 08:13 System.map-2.6.8-powerpc
lrwxr-xr-x   1 root root      22 2005-01-19 18:51 vmlinux -> vmlinux-2.6.8-20050118
-rw-r--r--   1 root root 3966579 2005-01-19 03:48 vmlinux-2.6.8-20050118
-rw-r--r--   1 root root 3964695 2004-10-03 08:13 vmlinux-2.6.8-powerpc
-rw-r--r--   1 root root 1290162 2005-01-19 03:48 vmlinux.coff-2.6.8-20050118
lrwxr-xr-x   1 root root      21 2004-12-16 01:44 vmlinux.old -> vmlinux-2.6.8-powerpc

This is the only difference in kernel config:
chrisd@blueberry:/boot$ diff config-2.6.8-20050118 config-2.6.8-powerpc
314a315
> # CONFIG_AIC7XXX_BUILD_FIRMWARE is not set
321a323
> # CONFIG_AIC79XX_BUILD_FIRMWARE is not set

So I don't quite understand why an initrd image wasn't created, nor how I can create one myself to get my new kernel booting.  Any suggestions?