port-macppc/53549: ppc601 machines need their own INSTALL kernel

[scole_mail%gmx.com@localhost]

>Number:         53549
>Category:       port-macppc
>Synopsis:       ppc601 machines need their own INSTALL kernel
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Fri Aug 24 16:30:00 +0000 2018
>Originator:     scole_mail
>Release:        8.0
>Organization:
none
>Environment:
NetBSD dstar 7.1.2_PATCH NetBSD 7.1.2_PATCH (GENERIC) #0: Wed Aug 22 09:17:21 PDT 2018  scole@dstar:/home/scole/nbsd/cvs/7_0/obj/sys/arch/i386/compile/GENERIC i386
>Description:
It may be almost moot at this point, but the Power PC 601 machines
need their own INSTALL kernel.  The existing INSTALL kernel can't boot a ppc601.

When I was looking at the ppc601 stuff, iirc, I didn't have a working
CD drive or floppy, so I didn't try set up and test proper install
media.  Creating 601 install media I guess that would involve:

- In /src/etc/etc.macppc/Makefile.inc, adding 601 kernel
  BUILD_KERNELS+=		INSTALL INSTALL_601 GENERIC_MD

- adding new kernel config file, e.g.,:
	src/sys/arch/macppc/conf/INSTALL_601
  It might be nice if this kernel was under 4M uncompressed so it
  could be netbooted, but that is not necessary.  It could be based
  off the existing GENERIC_601, adding whatever else is required for
  the INSTALL stuff.  This should generate files like: 
       pub/NetBSD/NetBSD-8.0/macppc/binary/kernel/netbsd-INSTALL_601.gz
       pub/NetBSD/NetBSD-8.0/macppc/binary/kernel/netbsd-INSTALL.symbols.gz 

- I haven't looked closely at how boot floppies and iso images work,
  but maybe changing
      src/distrib/macppc/cdroms/installcd/Makefile
      src/distrib/macppc/floppies/bootfloppy
  to generate something like
     pub/NetBSD/NetBSD-8.0/macppc/installation/floppy/boot6_1.fs
     pub/NetBSD/NetBSD-8.0/macppc/installation/floppy/boot6_2.fs
     pub/NetBSD/NetBSD-8.0/images/NetBSD-8.0-macppc_601.iso
     pub/NetBSD/NetBSD-8.0/images/NetBSD-8.0-macppc_601.iso.torrent

- probably other stuff I'm missing...

I'll try to submit some patches, but I can't test such changes because
I no longer have 601 hardware.

If someone who understands the install framework better wants to do
this, feel free.  I would say it is better to have something there
even if it is untested.

Thanks

>How-To-Repeat:

>Fix: