Messages in this thread |  | | Date | Sat, 9 Apr 2022 14:18:48 +1000 | Subject | Re: [RFC PULL] remove arch/h8300 | From | Greg Ungerer <> |
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On 9/4/22 11:59, Finn Thain wrote: > On Fri, 8 Apr 2022, Rob Landley wrote: > >> On 4/5/22 08:07, Greg Ungerer wrote: >>> On 5/4/22 13:23, Daniel Palmer wrote: >>>> On Mon, 4 Apr 2022 at 22:42, Greg Ungerer <gerg@linux-m68k.org> wrote: >>>>> But we could consider the Dragonball support for removal. I keep it >>>>> compiling, but I don't use it and can't test that it actually works. >>>>> Not sure that it has been used for a very long time now. And I >>>>> didn't even realize but its serial driver (68328serial.c) was >>>>> removed in 2015. No one seems too have noticed and complained. >>>> >>>> I noticed this and I am working on fixing it up for a new Dragonball >>>> homebrew machine. I'm trying to add a 68000 machine to QEMU to make >>>> the development easier because I'm currently waiting an hour or more >>>> for a kernel to load over serial. It might be a few months. >> >> I've been booting Linux on qemu-system-m68k -M q800 for a couple years >> now? (The CROSS=m68k target of mkroot in toybox?) >> >> # cat /proc/cpuinfo >> CPU: 68040 >> MMU: 68040 >> FPU: 68040 >> Clocking: 1261.9MHz >> BogoMips: 841.31 >> Calibration: 4206592 loops >> >> It certainly THINKS it's got m68000... >> > > Most 68040 processor variants have a built-in MMU and the m68k "nommu" > Linux port doesn't support them. The nommu port covers processors like > 68000, Dragonball etc. whereas the m68k "mmu" port covers 680x0 where x is > one of 2,3,4,6 with MMU. > >> $ qemu-system-m68k -cpu ? >> cfv4e >> m5206 >> m5208 >> m68000 >> m68010 >> m68020 >> m68030 >> m68040 >> m68060 >> any >> >> (I'd love to get an m68k nommu system working but never sat down and >> worked out a kernel .config qemu agreed to run, plus compiler and libc. >> Musl added m68k support but I dunno if that includes coldfire?) >> > > I could never figure out how to boot a coldfire machine in qemu either. > There was no documentation about that back when I attempted it but maybe > things have improved since.
FWIW this will do it:
qemu-system-m68k -nographic -machine mcf5208evb -kernel vmlinux
That will boot an m5208evb_defconfig generated vmlinux. But you will need a user space to get a full boot to login/shell.
Regards Greg
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