* Porting m68k/nommu to a new board.
@ 2011-12-16 5:37 Daniel Palmer
2011-12-16 7:03 ` Geert Uytterhoeven
0 siblings, 1 reply; 6+ messages in thread
From: Daniel Palmer @ 2011-12-16 5:37 UTC (permalink / raw)
To: linux-kernel
Hi,
I'm building a custom machine based around a 68sec000 (Fully static 68ec000).
The "board" is a bunch of parts at the moment but I have written a workable
simulator for the machine which I am using as a testbed for testing things
like my custom video, DMA controller etc before creating the hardware versions
in VHDL.
I'm interested in getting mmu-less m68k linux (what used to be known as
uclinux I guess, seems to be known as m68k/nommu now) running on the simulator
and later on the real hardware.
>From what I can tell the nommu m68k port is still active. But does it actually
work? All the details on similar hardware (like the older Palm pilots, Atari
machines) is pretty ancient, around 2.0. Does anyone have a machine running a
recent kernel? Were there issues getting it running?
I did a bit of digging in the source and doesn't look like it should be too
difficult to add the specifics for my machine.. I have a 16550 style UART
emulated for I/O so I don't need to write a framebuffer driver at the moment.
I'm open to any suggestions people have on how to approach this though.
Please CC me as I'm not subscribed.
Thanks,
Daniel
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Porting m68k/nommu to a new board. 2011-12-16 5:37 Porting m68k/nommu to a new board Daniel Palmer @ 2011-12-16 7:03 ` Geert Uytterhoeven 2011-12-16 10:57 ` Greg Ungerer 0 siblings, 1 reply; 6+ messages in thread From: Geert Uytterhoeven @ 2011-12-16 7:03 UTC (permalink / raw) To: Daniel Palmer; +Cc: linux-kernel, Linux/m68k, uClinux development list Added CCs. On Fri, Dec 16, 2011 at 06:37, Daniel Palmer <me@danielpalmer.co.uk> wrote: > Hi, > > I'm building a custom machine based around a 68sec000 (Fully static 68ec000). > The "board" is a bunch of parts at the moment but I have written a workable > simulator for the machine which I am using as a testbed for testing things > like my custom video, DMA controller etc before creating the hardware versions > in VHDL. > > I'm interested in getting mmu-less m68k linux (what used to be known as > uclinux I guess, seems to be known as m68k/nommu now) running on the simulator > and later on the real hardware. > > From what I can tell the nommu m68k port is still active. But does it actually > work? All the details on similar hardware (like the older Palm pilots, Atari > machines) is pretty ancient, around 2.0. Does anyone have a machine running a > recent kernel? Were there issues getting it running? > > I did a bit of digging in the source and doesn't look like it should be too > difficult to add the specifics for my machine.. I have a 16550 style UART > emulated for I/O so I don't need to write a framebuffer driver at the moment. > I'm open to any suggestions people have on how to approach this though. > > > Please CC me as I'm not subscribed. > > Thanks, > > Daniel > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Porting m68k/nommu to a new board. 2011-12-16 7:03 ` Geert Uytterhoeven @ 2011-12-16 10:57 ` Greg Ungerer 2011-12-19 2:24 ` Daniel Palmer 0 siblings, 1 reply; 6+ messages in thread From: Greg Ungerer @ 2011-12-16 10:57 UTC (permalink / raw) To: Daniel Palmer Cc: Geert Uytterhoeven, linux-kernel, Linux/m68k, uClinux development list Hi Daniel, > On Fri, Dec 16, 2011 at 06:37, Daniel Palmer<me@danielpalmer.co.uk> wrote: >> I'm building a custom machine based around a 68sec000 (Fully static 68ec000). >> The "board" is a bunch of parts at the moment but I have written a workable >> simulator for the machine which I am using as a testbed for testing things >> like my custom video, DMA controller etc before creating the hardware versions >> in VHDL. >> >> I'm interested in getting mmu-less m68k linux (what used to be known as >> uclinux I guess, seems to be known as m68k/nommu now) running on the simulator >> and later on the real hardware. uclinux is/was mmuless support. m68knommu used to be the arch name for m68k without mmu support. I just use Linux now, it has all been in mainline for so long now. >> From what I can tell the nommu m68k port is still active. But does it actually >> work? All the details on similar hardware (like the older Palm pilots, Atari >> machines) is pretty ancient, around 2.0. Does anyone have a machine running a >> recent kernel? Were there issues getting it running? I run on ColdFire parts all the time. Right up to 3.2-rc5 :-) It works great. But I don't have or regularly use any original m68k core hardware. I occasionally compile for the 68328 target, so it will compile, can't be sure if it still runs though. >> I did a bit of digging in the source and doesn't look like it should be too >> difficult to add the specifics for my machine.. I have a 16550 style UART >> emulated for I/O so I don't need to write a framebuffer driver at the moment. >> I'm open to any suggestions people have on how to approach this though. With the m68k and m68knommu arch code now merged it shouldn't be too hard to enable/configure all the pieces you have. Might take a little hacking to make it work, but it should be close. Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Principal Engineer EMAIL: gerg@snapgear.com SnapGear Group, McAfee PHONE: +61 7 3435 2888 8 Gardner Close, FAX: +61 7 3891 3630 Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Porting m68k/nommu to a new board. 2011-12-16 10:57 ` Greg Ungerer @ 2011-12-19 2:24 ` Daniel Palmer 2011-12-21 11:49 ` Greg Ungerer 2011-12-22 7:22 ` Greg Ungerer 0 siblings, 2 replies; 6+ messages in thread From: Daniel Palmer @ 2011-12-19 2:24 UTC (permalink / raw) To: Greg Ungerer Cc: Geert Uytterhoeven, linux-kernel, Linux/m68k, uClinux development list Hi Greg, Sorry for not replying sooner. Too much work :( > I run on ColdFire parts all the time. Right up to 3.2-rc5 :-) > It works great. But I don't have or regularly use any original m68k > core hardware. I occasionally compile for the 68328 target, so it > will compile, can't be sure if it still runs though. I did a bit of poking around, I couldn't get the 68328 target to build.. I was going to have a play with it in xcopilot. It complains about some linker section missing .. but I started hacking it up anyway.. at the moment m68328 depends on m68000 which in turn causes the 68328 platform stuff to build. So I worked that a little so that 68000 is its own target that builds with some minimal startup code (so I can dump the resulting image into my emulator and see how far it gets.. I have a gdbserver in my emulator so I can fully see whats happening). I haven't managed to get an image out of it yet.. but I will have another go at the weekend. I'm going to get an old palm pilot off of ebay and see if I can get the 68328 target running too. Thanks, Daniel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Porting m68k/nommu to a new board. 2011-12-19 2:24 ` Daniel Palmer @ 2011-12-21 11:49 ` Greg Ungerer 2011-12-22 7:22 ` Greg Ungerer 1 sibling, 0 replies; 6+ messages in thread From: Greg Ungerer @ 2011-12-21 11:49 UTC (permalink / raw) To: Daniel Palmer Cc: Geert Uytterhoeven, linux-kernel, Linux/m68k, uClinux development list Hi Daniel, On 12/19/2011 12:24 PM, Daniel Palmer wrote: > Sorry for not replying sooner. Too much work :( No problem :-) >> I run on ColdFire parts all the time. Right up to 3.2-rc5 :-) >> It works great. But I don't have or regularly use any original m68k >> core hardware. I occasionally compile for the 68328 target, so it >> will compile, can't be sure if it still runs though. > > I did a bit of poking around, I couldn't get the 68328 target to build.. I was > going to have a play with it in xcopilot. It complains about some linker > section missing .. but I started hacking it up anyway.. at the moment m68328 > depends on m68000 which in turn causes the 68328 platform stuff to build. > So I worked that a little so that 68000 is its own target that builds with > some minimal startup code (so I can dump the resulting image into my emulator > and see how far it gets.. I have a gdbserver in my emulator so I can fully see > whats happening). I haven't managed to get an image out of it yet.. but I will > have another go at the weekend. Sounds good. Keep us posted on how you go. > I'm going to get an old palm pilot off of ebay and see if I can get the 68328 > target running too. Yeah, would be really nice to know what state the 68328 code is in. I will compile it again too, and see if anything is obviously broken at the moment. Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Principal Engineer EMAIL: gerg@snapgear.com SnapGear Group, McAfee PHONE: +61 7 3435 2888 8 Gardner Close, FAX: +61 7 3891 3630 Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Porting m68k/nommu to a new board. 2011-12-19 2:24 ` Daniel Palmer 2011-12-21 11:49 ` Greg Ungerer @ 2011-12-22 7:22 ` Greg Ungerer 1 sibling, 0 replies; 6+ messages in thread From: Greg Ungerer @ 2011-12-22 7:22 UTC (permalink / raw) To: Daniel Palmer Cc: Geert Uytterhoeven, linux-kernel, Linux/m68k, uClinux development list Hi Daniel, On 19/12/11 12:24, Daniel Palmer wrote: > Sorry for not replying sooner. Too much work :( > >> I run on ColdFire parts all the time. Right up to 3.2-rc5 :-) >> It works great. But I don't have or regularly use any original m68k >> core hardware. I occasionally compile for the 68328 target, so it >> will compile, can't be sure if it still runs though. > > I did a bit of poking around, I couldn't get the 68328 target to build.. I was > going to have a play with it in xcopilot. It complains about some linker Yep, a couple of issues when building for the Palm/Pilot. I just sent a couple of patches to m68k-linux that fix the main problems. You will also want to disable CONFIG_FW_LOADER if you have that enabled. After that I can compile it all the way (I am building on 3.2-rc6). No idea if it works though. Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Principal Engineer EMAIL: gerg@snapgear.com SnapGear Group, McAfee PHONE: +61 7 3435 2888 8 Gardner Close FAX: +61 7 3217 5323 Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-12-22 7:26 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2011-12-16 5:37 Porting m68k/nommu to a new board Daniel Palmer 2011-12-16 7:03 ` Geert Uytterhoeven 2011-12-16 10:57 ` Greg Ungerer 2011-12-19 2:24 ` Daniel Palmer 2011-12-21 11:49 ` Greg Ungerer 2011-12-22 7:22 ` Greg Ungerer
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