[U-Boot] [PATCH sunxi-tools v2 0/2] Support unified u-boot SPL for SD cards and FEL mode

[Siarhei Siamashka]

An updated variant of the older patch
    http://lists.denx.de/pipermail/u-boot/2015-February/204024.html

These patches are not for the u-boot code (unless u-boot decides to
cannibalize the 'fel' tool later) but still provide a glue layer
between the Allwinner BROM code and the u-boot SPL code. And need
to play nice with both of them.

The updated 'fel' tool is supposed to be used together with u-boot
v2015.04 and provide support for booting regular u-boot SPL binaries
over USB via FEL mode. So that a special u-boot sunxi FEL configuration
can be eventually dropped in the future.

The usage instructions are in the 'New method of booting u-boot over USB
(u-boot v2015.04 and later versions)' section of the linux-sunxi wiki page
    http://linux-sunxi.org/index.php?title=FEL/USBBoot&oldid=12979

It temporarily moves the BROM data from the first 32 KiB of SRAM into
a different SRAM section before calling the SPL code. And then moves
it back before returning from the SPL back to the FEL code in BROM.
This provides a contiguous 32 KiB block in the beginning of SRAM for
use by the SPL. And in the case if an extra SRAM section is not
available, we can at least "defragmemnt" the free memory areas
and still provide a contiguous ~21 KiB block to the SPL in the
beginning of SRAM.

This code is also available in the following branch:
    https://github.com/ssvb/sunxi-tools/commits/20150206-fel-large-spl-support

Siarhei Siamashka (2):
  fel: Split 'aw_fel_get_version' into 'get' and 'print' variants
  fel: New command for loading U-Boot SPL binaries in eGON format

 fel-to-spl-thunk.S | 172 +++++++++++++++++++++++++++++++
 fel-to-spl-thunk.h |  69 +++++++++++++
 fel.c              | 291 +++++++++++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 510 insertions(+), 22 deletions(-)
 create mode 100644 fel-to-spl-thunk.S
 create mode 100644 fel-to-spl-thunk.h

-- 
2.0.5