[PATCH] arm/tegra: select AUTO_ZRELADDR by default
nico at fluxnic.net
Fri Oct 14 16:06:21 EDT 2011
On Fri, 14 Oct 2011, Russell King - ARM Linux wrote:
> But... one thing to note is that it _is_ common to load the decompressor
> at a _different_ address to that where the kernel ultimately ends up
> residing to avoid the additional copy in the decompressor. My experience
> shows that this is quite common on the platforms I had supplied. This
> means that if we default to AUTO_ZRELADDR for !ZBOOT_ROM, we end up
> having to have developers change their uboot setups to avoid unexpected
Currently, U-Boot insists on having a uImage with a fixed absolute load
address. This is currently provided by the zreladdr value, whether or
not AUTO_ZRELADDR is set. I consider this as a persisting uImage
Either u-Boot gets fixed so it can work with plain zImage (and this
certainly will happen once the pressure from people wanting a single
kernel to work on targets with different load addresses increase.
Tegra is one such example.
Or we create a u-Boot specific Kconfig menu for uImage options that
would be common to all architectures and kick it out from the ARM
specific makefile. This is not solving the u-Boot limitation though.
In either cases this is a u-Boot problem that needs fixing on the u-Boot
side in the end.
More information about the linux-arm-kernel