linux.git/arch/m68k/Kconfig.machine, branch master

m68k: virt: Switch to qemu-virt-ctrl driver

2026-04-13T10:16:10+00:00

Register the "qemu-virt-ctrl" platform device during board
initialization to utilize the new generic power/reset driver.

Consequently, remove the legacy reset and power-off implementations
specific to the virt machine. The platform's mach_reset callback is
updated to call do_kernel_restart(), bridging the legacy m68k reboot
path to the generic kernel restart handler framework for this machine.

To prevent any regressions in reboot or power-off functionality when
the driver is not built-in, explicitly select POWER_RESET and
POWER_RESET_QEMU_VIRT_CTRL for the VIRT machine in Kconfig.machine.

Signed-off-by: Kuan-Wei Chiu 
Reviewed-by: Geert Uytterhoeven 
Link: https://patch.msgid.link/20260412211952.3564033-3-visitorckw@gmail.com
Signed-off-by: Geert Uytterhoeven

m68k: Move Sun 3 into a top-level platform option

2024-11-06T14:10:14+00:00

It is possible to select an m68k MMU build but not actually enable any
of the three MMU options, which then results in a build failure:

    arch/m68k/include/asm/page.h:10:25: error: 'CONFIG_PAGE_SHIFT' undeclared here (not in a function); did you mean 'CONFIG_LOG_BUF_SHIFT'?

Change the Kconfig selection to ensure that exactly one of the three
options is always enabled whenever an MMU-enabled kernel is built, but
moving CONFIG_SUN3 into a top-level option next to M68KCLASSIC and
COLDFIRE.

All defconfig files should keep working without changes, but
alldefconfig now builds support for the classic MMU.

Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202408032138.P7sBvIns-lkp@intel.com/
Signed-off-by: Arnd Bergmann 
Acked-by: Greg Ungerer 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/20241030195638.22542-1-arnd@kernel.org
Signed-off-by: Geert Uytterhoeven

m68knommu: improve config ROM setting defaults

2023-10-22T22:22:22+00:00

The ROM region configuration settings used on some nommu m68k systems
(historically mostly 68328 (Dragonball) CPUs) default to an address
of 0. That can easily clash with default RAM address settings which
also default to 0. Of course that is invalid and those ranges overlap,
but if you make no value selection that is what you end up with. Those
default values produce a valid configuration but will fail compilation
like this:

    m68k-linux-ld: section .rodata VMA [0000000000001000,0000000000262227] overlaps section .text VMA [0000000000000400,0000000000455e7f]

Looking at the platforms that use the ROM region configuration settings
it is clear that we can choose much better defaults than 0. By far the
most common ROM region settings are these:

    CONFIG_ROMVEC=0x10c10000
    CONFIG_ROMSTART=0x10c10400

So lets make these the default values.

It is still possible to configure overlapping ROM and RAM regions, but
at least the default selections are now valid.

Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202305301407.z33zOjcG-lkp@intel.com/
Signed-off-by: Greg Ungerer

Merge tag 'm68knommu-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

2023-04-28T23:37:54+00:00

Pull m68knommu updates from Greg Ungerer:
 "A couple of minor changes.

  One to remove the long dead uclinux.org web address and email list
  from the MAINTAINERS entry for UCLINUX.

  The other to remove dead config options in the m68knommu Kconfig"

* tag 'm68knommu-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: Kconfig.machine: remove obsolete configs ROMBASE and ROMSIZE
  MAINTAINERS: drop uclinux.org

m68k: Kconfig.machine: remove obsolete configs ROMBASE and ROMSIZE

2023-04-16T23:30:53+00:00

The configs ROMBASE and ROMSIZE were used in arch/m68k/68360/head-ram.S,
which was removed with commit a3595962d824 ("m68knommu: remove obsolete
68360 support").

Remove the obsolete configs ROMBASE and ROMSIZE.

Signed-off-by: Lukas Bulwahn 
Fixes: a3595962d82495f5 ("m68knommu: remove obsolete 68360 support")
Reviewed-by: Geert Uytterhoeven 
Signed-off-by: Greg Ungerer

docs: move m68k architecture documentation under Documentation/arch/

2023-04-10T22:46:11+00:00

Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy.  Move
Documentation/m68k into arch/ and fix all in-tree references.

Reviewed-by: Geert Uytterhoeven 
Signed-off-by: Jonathan Corbet

m68k: nommu: Fix misspellings of "DragonEngine"

2023-02-12T22:56:39+00:00

Exys produced the "DragonEngine II" board.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Ungerer

m68k: nommu: Fix misspellings of "uCdimm"

2023-02-12T22:56:39+00:00

Arcturus Networks produced the "uCsimm" and "uCdimm" modules.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Ungerer

m68k: Kconfig.machine: Add endif comment

2022-07-06T12:07:04+00:00

Add missing trailing endif comment.

Signed-off-by: Juerg Haefliger 
Link: https://lore.kernel.org/r/20220524075848.21684-4-juergh@canonical.com
Signed-off-by: Geert Uytterhoeven

m68k: virt: Kconfig minor fixes

2022-06-20T12:16:43+00:00

Select VIRTIO_MENU as it is needed by VIRTIO_MMIO.

Add an ending period at the end of the virt machine help message.

Reported-by: Randy Dunlap 
Signed-off-by: Laurent Vivier 
Tested-by: Randy Dunlap 
Acked-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20220531174514.1586248-1-laurent@vivier.eu
Signed-off-by: Geert Uytterhoeven