[PATCH 4/9] ARM: add CONFIG_PHYS_OFFSET default values
Arnd Bergmann
arnd at arndb.de
Fri Feb 19 00:33:39 PST 2016
On Thursday 18 February 2016 11:02:33 Nicolas Pitre wrote:
>
> Acked-by: Nicolas Pitre <nico at 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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