[PATCH resend] ARM: nommu: remove ARCH_MULTIPLATFORM's dependency on CONFIG_MMU
jonathan.austin at arm.com
Thu Aug 15 13:02:52 EDT 2013
On 23/07/13 17:41, Jonathan Austin wrote:
> From: Arnd Bergmann <arnd at arndb.de>
> ARCH_MULTIPLATFORM currently requires CONFIG_MMU to be set, however it is
> intended that all future V6/V7 platforms are compatible with
> ARCH_MULTIPLATFORM, and so this requirement precludes that addition of new
> !MMU platforms.
> Furthermore, this requirement creates unnecessary differences between the MMU
> and !MMU worlds, which is undesirable.
> This patch allows ARCH_MULTIPLATFORM to remain selected in a !MMU
> configuration. There is still a need to hardcode CONFIG_DRAM_BASE and other
> parameters relating to the system, so this patch is less about making an
> actual multiplatform kernel for !MMU and more about consistency across the
> Along with the nommu-fixes, R7 support and MPU support already sent to this
> list, this patch is sufficient to allow building and booting of kernel for a
> Cortex-R7 core on a Versatile Express platform.
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> Signed-off-by: Jonathan Austin <jonathan.austin at arm.com>
> This patch was written by Arnd and after some discussion/testing at my end he
> asked me to send it to the list with a full description.
> I'm resending this after testing it still allows R7 to boot on 3.11.
> Assuming no comments, I'll drop this in the patch system shortly. Any calls for
> Cc-ing stable?
I've just put this in Russell's patch system (as 7817/1) after testing
> arch/arm/Kconfig | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 49d993c..5a61686 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -289,8 +289,7 @@ choice
> config ARCH_MULTIPLATFORM
> bool "Allow multiple platforms to be selected"
> - depends on MMU
> - select ARM_PATCH_PHYS_VIRT
> + select ARM_PATCH_PHYS_VIRT if MMU
> select AUTO_ZRELADDR
> select COMMON_CLK
> select MULTI_IRQ_HANDLER
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