[PATCH] odroid-c2: Enable distro boot
Andreas Färber
afaerber at suse.de
Tue Nov 1 14:51:14 PDT 2016
Hi Alex,
Am 01.11.2016 um 22:19 schrieb Alexander Graf:
> On 01/11/2016 22:11, Andreas Färber wrote:
>> diff --git a/include/configs/meson-gxbb-common.h
>> b/include/configs/meson-gxbb-common.h
>> index 3bba2e6..0c467fe 100644
>> --- a/include/configs/meson-gxbb-common.h
>> +++ b/include/configs/meson-gxbb-common.h
>> @@ -40,4 +40,17 @@
>>
>> #include <config_distro_defaults.h>
>>
>> +#define BOOT_TARGET_DEVICES(func) \
>> + func(DHCP, dhcp, na)
>
> Does the board have more common I/O available than Ethernet? MMC? SATA?
The board yes, U-Boot no. :) That's why I needed to get PXE to work. ;)
Thanks for your help.
FTR I noticed that in v2016.11-rc3 `bootp; bootefi 0x01000000` leads to
an odd $net_{default,efinet0}_mac in GRUB. CONFIG_DISTRO_DEFAULTS
(pulling in CONFIG_CMD_DHCP) resolved this, even when not booting
through the distro framework as before.
BTW it was unclear to me why CONFIG_CMD_SOURCE was disabled in the
defconfig - the distro framework emits an error if missing when it first
tries to execute the PXE file as script, therefore restoring the default
of enabling.
> If so, please add those too :).
>
>> +#include <config_distro_bootcmd.h>
>> +
>> +#define CONFIG_EXTRA_ENV_SETTINGS \
>> + "fdt_addr_r=0x01000000\0" \
>
> This puts the device tree at 16MB. I don't know how smart the kernel is
> these days about accessing
>
> a) critical memory below its own starting point
> b) memory that might collide with its own relocation point
>
> so to be safe I think you're better off putting the device tree
> somewhere higher up. Maybe around 800MB?
The fdt and kernel addresses were adopted from the vendor U-Boot and
they worked for my PXE GRUB setup. ramdisk_addr_r was chosen by me and
is untested.
That said, maybe the linux-amlogic people have some input here.
Cheers,
Andreas
>> + "scriptaddr=0x1f000000\0" \
>> + "kernel_addr_r=0x20000000\0" \
>> + "pxefile_addr_r=0x20000000\0" \
>> + "ramdisk_addr_r=0x28000000\0" \
>> + MESON_FDTFILE_SETTING \
>> + BOOTENV
>> +
>> #endif /* __MESON_GXBB_COMMON_CONFIG_H */
[snip]
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