linux-toradex.git/arch/m68k/Kconfig.machine, branch v6.7

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

Merge tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

2022-05-30T17:56:18+00:00

Pull m68knommu updates from Greg Ungerer:
 "A collection of changes to add elf-fdpic loader support for m68k.

  Also a collection of various fixes. They include typo corrections,
  undefined symbol compilation fixes, removal of the ISA_DMA_API support
  and removal of unused code.

  Summary:

   - correctly set up ZERO_PAGE pointer

   - drop ISA_DMA_API support

   - fix comment typos

   - fixes for undefined symbols

   - remove unused code and variables

   - elf-fdpic loader support for m68k"

* tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: fix 68000 CPU link with no platform selected
  m68k: removed unused "mach_get_ss"
  m68knommu: fix undefined reference to `mach_get_rtc_pll'
  m68knommu: fix undefined reference to `_init_sp'
  m68knommu: allow elf_fdpic loader to be selected
  m68knommu: add definitions to support elf_fdpic program loader
  m68knommu: implement minimal regset support
  m68knommu: use asm-generic/mmu.h for nommu setups
  m68k: fix typos in comments
  m68k: coldfire: drop ISA_DMA_API support
  m68knommu: set ZERO_PAGE() to the allocated zeroed page

m68knommu: fix undefined reference to `_init_sp'

2022-05-16T06:34:19+00:00

When configuring a nommu classic m68k system enabling the uboot parameter
passing support (CONFIG_UBOOT) will produce the following compile error:

   m68k-linux-ld: arch/m68k/kernel/uboot.o: in function `process_uboot_commandline':
   uboot.c:(.init.text+0x32): undefined reference to `_init_sp'

The logic to support this option is only used on ColdFire based platforms
(in its head.S startup code). So make the selection of this option
depend on building for a ColdFire based platform.

Reported-by: kernel test robot 
Reviewed-by: Geert Uytterhoeven 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Greg Ungerer