ARCH_MULTIPLATFORM + ARM_APPENDED_DTB + custom boot-loader
Mason
slash.tmp at free.fr
Thu Nov 26 09:10:06 PST 2015
On 26/11/2015 17:53, Mason wrote:
> I'm using an ARCH_MULTIPLATFORM kernel with an appended DTB.
> I make a uImage out of this zImage+DTB.
> On my board, U-Boot passes control to Linux, which boots correctly.
>
> But when I replace U-Boot with a custom boot-loader, Linux tries
> to boot some kind of "Generic DT based system" rather than the DT
> I appended.
>
> In fact, my setup code is:
>
> static const char *const tango_dt_compat[] = { "sigma,tango4", NULL };
> DT_MACHINE_START(TANGO_DT, "Sigma Tango DT")
> .dt_compat = tango_dt_compat,
> .l2c_aux_mask = ~0,
> .l2c_write_sec = tango_l2c_write,
> MACHINE_END
>
>
> When I boot with U-Boot, in the early stage, the kernel prints
> [ 0.000000] Machine model: Sigma Designs SMP8758 Vantage-1172 Rev E1
> (that's my model property)
>
> But when I boot with the custom boot-loader, it just prints
> [ 0.000000] Machine: Sigma Tango DT
> (and fails quickly since there are no clocks)
I was working off incorrect assumptions.
The custom boot-loader was given an Image (not a uImage) and the DT
was probably not appended to the Image.
Question: can a DT be appended to an Image, or does it have to be
appended to a zImage? Can a zImage be uncompressed or compressed
with a null compressor?
Regards.
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