[meta-xilinx] u-boot environment limit

[Nathan Rossi]

On 14 February 2017 at 23:22, Arno Steffens <star at gmx.li> wrote:
> If I increase the uboot environment (by patching zynq-common.h) it happens that uboot stops working.
> With a few lines changing/adding it seems to boot normal.
> With more lines is stops after "DRAM:  ECC disabled 496 MiB"
>
> Now I played with the patch and get once this (see below):
> This looks a bit like overwriting memory.
>
> So is there a fix limit for the environment? It seems to be one huge string, right?
> How can I extend this? Is this a bug?
>
> #define CONFIG_ENV_SIZE                 0x10000 -> this seems to me big enough.

The default zynq-common.h CONFIG_ENV_SIZE is double this value, 128 <<
10 == 0x20000. And the default environment is pretty packed (64K might
not be enough).

If you want your environment to fit within 64K, you will need to
reduce the default environment config that is provided by
zynq-common.h.

>
> U-Boot 2016.07-dirty (Feb 14 2017 - 12:59:07 +0100)
>
> Model: Zynq MicroZED Board
> Board: Xilinx Zynq
> DRAM:  ECC disabled 496 MiB
> Error binding driver 'gpio_zynq': -12
> Error binding driver 'serial_zynq': -12
> Error binding driver 'zynq_qspi': -12
> Error binding driver 'zynq_gem': -12
> Error binding driver 'arasan_sdhci': -12
> Error binding driver 'generic_simple_bus': -12
> Some drivers failed to bind
> Error binding driver 'generic_simple_bus': -12
> Some drivers failed to bind
> initcall sequence 1ef99b98 failed at call 0400ea34 (err=-12)
> ### ERROR ### Please RESET the board ###

These are all ENOMEM errors, likely caused because they are trying to
read/write past the end of the environment.

Regards,
Nathan