Re: Debian ARM architectures and subarchitectures
Loïc Minier <lool@dooz.org> writes:
> On Mon, Apr 04, 2011, Hector Oron wrote:
>> static const char *supported_generic_subarches[] = {
>> "dove",
>
> matches mach-dove, no plat-dove
>
>> "omap",
>
> matches plat-omap, but no mach-omap (mach-omap1 supports OMAP1xxx and
> mach-omap2 supports OMAP 2+ -- 2xxx, 3xxx, 4xxx).
>
>> "omap4",
>
> doesn't match any plat or mach dir
>
>> "mx51",
>
> neither does this
>
>> and machine mappings has:
>> { "Freescale MX51 Babbage Board", "imx5" }, /* iMX51 reference hardware. */
>
> plat-imx5 is a name which was used in the Freescale BSP which also used
> mach-imx51 in the past.
>
>> Would it break 'others' configurations if we set/change 'mx5' as
>> subarchitecture, which seems to be the most reasonable one at the
>> moment.
>
> I think you really want to go for mx5; as this was never supported in
> Debian so far, that should be ok; if you need to change existing
> imx5/mx51 bits, poke the Ubuntu folks (or I can forward) as it might
> impact them.
>
> I've commented in Debian #612376 on why we want mx5; quoting myself:
> """Currently, the upstream
> kernel doesn't support building both i.MX51 and i.MX53 in the same
> kernel but the Linux Linaro branch and the Freescale BSP kernel do;
> also, I think the patches by Eric Miao allowing this (runtime phys
> offset patches -- i.MX51 has phys RAM at 0x90000000 while i.MX53 has it
> at 0x70000000, see arch/arm/mach-mx5/Makefile.boot) are pending in
> Sacha Hauer's tree, but I'm not entirely sure.
that's why I was talking of checking imx51/imx53 support in same
kernel. iirc imx50 has same addresses as imx53.
>
> Technically, mx5 would only support mx51 right now, but would soon
> allow supporting mx53 as well, notably for mx53loco / quickstart boards
> which I bet a bunch of Debian ARM users will get."""
tbh, I was thinking of loco boards when talking of imx53. Given the
price of loco, it makes them interesting so would be bad to have 2
kernels instead of one.
>
> In the kernel, there's plat-mxc, mach-imx, mach-mx3 and mach-mx5. I
> expect Debian will want to support popular mach-mx5 hardware for i.MX51
> (Efika MX Smartbook and Smarttop) and i.MX53 (Freescale MX53LOCO /
> Quickstart board).
>
> Also note that the currently supported subarches in Debian ARM are:
> - iop32x (matches mach-iop32x, not plat-iop -- there are some other
> mach-iop*)
> - kirkwood (matches mach-kirkwood, no plat-kirkwood I think it's
> plat-orion)
yeah, it's plat-orion for mach-kirkwood, mach-orion5x. I guess it's true
for mv78xx0 too.
Arnaud
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