Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH 4/9] ARM: add CONFIG_PHYS_OFFSET default values | Date | Fri, 19 Feb 2016 09:33:39 +0100 |
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On Thursday 18 February 2016 11:02:33 Nicolas Pitre wrote: > > Acked-by: Nicolas Pitre <nico@linaro.org> > > Is there a way to provide a default for defaults?
We could have something like
config PHYS_OFFSET_0 bool
config PHYS_OFFSET_1 bool
config PHYS_OFFSET_2 bool
... (we need 8 of the 16 possible addresses)
config PHYS_OFFSET hex "Physical address of main memory" if MMU default DRAM_BASE if !MMU default 0x00000000 if PHYS_OFFSET_0 default 0x10000000 if PHYS_OFFSET_1 default 0x20000000 if PHYS_OFFSET_2 default 0x30000000 if PHYS_OFFSET_3 default 0x70000000 if PHYS_OFFSET_7 default 0x80000000 if PHYS_OFFSET_8 default 0xa0000000 if PHYS_OFFSET_A default 0xc0000000 if PHYS_OFFSET_C
and then select one of the bool symbols from each platform. Would that address your question?
FWIW, that would also let us do:
config XIP_KERNEL bool "Kernel Execute-In-Place from ROM" depends on PHYS_OFFSET_0 || PHYS_OFFSET_1 || PHYS_OFFSET_2 || PHYS_OFFSET_3 || PHYS_OFFSET_7 || PHYS_OFFSET_8 || PHYS_OFFSET_A || PHYS_OFFSET_C
We can probably come up with a more elaborate way to prevent configurations that have more than one of these set.
Arnd
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