Hi Geert,
Am 04.06.2021 um 19:54 schrieb Geert Uytterhoeven:
I have to wonder whether there is a nice simple definition for MULTI_ISA.
As I understand it, MULTI_ISA means that different byte orders and/or
different address translations need to be used in the same kernel, so
all that cannot be decided at build time.
As long as there is only a single platform that will use this code (ISA
only used on a single platform, and neither Atari IDE nor EtherNEC
used), MULTI_ISA is not needed.
If we have Kconfig symbols for 'single platform only', and
'multi-platform ISA use', that might be shorter to write and easier to
understand. Geert?
It would be nice to have that automatically, like with the current
MULTI_ISA define (and all the MACH_* in arch/m68k/include/asm/setup.h).
Perhaps we should extend kconfig syntax to define a group of
related symbols, and to automatically generate CONFIG_FOO_MULTI or
CONFIG_FOO_SINGLE (and even CONFIG_BAR_ONLY?) symbols?
I take it this is not supported by our current Kconfig syntax?
group ISA
item ATARI_ROM_ISA
item AMIGA_PCMCIA
item Q40
=> CONFIG_ISA_MULTI or CONFIG_ISA_SINGLE (+ e.g. ATARI_ROM_ISA_ONLY
if appropriate).
Are there other users who can benefit from this?
Nothing comes to mind immediately. But there will be other drivers
shared between different architectures (Mac / PowerPC?) that might benefit.
Cheers,
Michael
Gr{oetje,eeting}s,
Geert
