[U-Boot] [PATCH v3 00/19] SPL: extend FIT loading support

[Andre Przywara]

Some minor fixes version of the SPL FIT loading series and the respective
patches to enable this feature on 64-bit Allwinner SoCs.
There is a new patch (6/19) fixing the SPL_FIT dependencies, above all
selecting SPL_OF_LIBFDT when SPL_FIT is enabled. This reduces the number
of Kconfig symbols a board has to select for the SPL fit loading from
four down to two, which leads to changes in the final patches enabling
this feature. Compared to the previous version the SPL FIT loading
is now selected in the Kconfig for both 64-bit sunxi SoCs, so there is
less burden on each individual defconfig.
Also following Olliver's suggestion a symbol in mksunxiboot has been renamed.
---

The first five patches introduce the core of the extened SPL FIT loading
support, see below for a description. Patch 6 fixes a Kconfig dependency
to simplify the usage of this option.
Patches 7-10 make some room in the sunxi 64-bit SPL to allow
compiling in the FIT loading bits. Patch 11 and 12 let the SPL choose
the proper DT from the FIT image.
The next two patches add the infrastructure and an actual generator script,
so the FIT image is automatically created at build time.
Patches 14 and 15 enable the SPL FIT support for Allwinner 64-bit SoCs in
general and for the Pine64 and OrangePi PC 2 in particular.
The following two patches store a DT file name in the SPL header, so
U-Boot can easily pick the proper DT when scanning the FIT image.
The idea is that this DT name should stay with the board, ideally on
eMMC or SPI flash. So both U-Boot and a firmware update tool could
identify a board, updating with compatible firmware while keeping the
DT name in place. Ideally a board vendor would once seed this name
onto on-board storage like SPI flash.
I kept those two patches in, as the work on replacing mksunxiboot with
an mkimage extension is not ready yet. Feel free to drop those from
the series if this is a problem.
The final patch updates the Pine64 README file to document the current
way of building U-Boot, which now includes the ARM Trusted Firmware build
in its image.

I would be delighted if that series can make it into the next release,
as this finally enables the fully open source firmware for the 64-bit
Allwinner SoCs (including the ATF binary).

This series is based on sunxi/master, rebased upon origin/master.

Cheers,
Andre.

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Currently the FIT format is not used to its full potential in the SPL:
It only loads the first image from the /images node and appends the
proper FDT.
Some boards and platforms would benefit from loading more images before
starting U-Boot proper, notably Allwinner A64 and ARMv8 Rockchip boards,
which use an ARM Trusted Firmware (ATF) image to be executed before U-Boot.

This series tries to solve this in a board agnostic and generic way:
We extend the SPL FIT loading scheme to allow loading multiple images.
So apart from loading the image which is referenced by the "firmware"
property in the respective configuration node and placing the DTB right
behind it, we iterate over all strings in the "loadable" property.
Each image referenced there will be loaded to its specified load address.
The entry point U-Boot eventually branches to will be taken from the
first image to explicitly provide the "entry" property, or, if none
of them does so, from the load address of the "firmware" image.
This keeps the scheme compatible with the FIT images our Makefile creates
automatically at the moment.
Apart from the already mentioned ATF scenario this opens up more usage
scenarios, of which the commit message of patch 04/11 lists some.
The remaining patches prepare ane finally enable this scheme for the 64-bit
Allwinner boards.

Andre Przywara (18):
  SPL: FIT: refactor FDT loading
  SPL: FIT: rework U-Boot image loading
  SPL: FIT: improve error handling
  SPL: FIT: factor out spl_load_fit_image()
  SPL: FIT: allow loading multiple images
  Kconfig: fix SPL_FIT dependency
  tools: mksunxiboot: allow larger SPL binaries
  armv8: SPL: only compile GIC code if needed
  armv8: fsl: move ccn504 code into FSL Makefile
  sunxi: A64: move SPL stack to end of SRAM A2
  sunxi: SPL: store RAM size in gd
  sunxi: SPL: add FIT config selector for Pine64 boards
  Makefile: add rules to generate SPL FIT images
  sunxi: 64-bit SoCs: introduce FIT generator script
  sunxi: defconfig: add supported DT list for Pine64 and OrangePi PC 2
  sunxi: enable automatic FIT build for 64-bit SoCs
  sunxi: use SPL header DT name for FIT board matching
  sunxi: update Pine64 README

Siarhei Siamashka (1):
  sunxi: Store the device tree name in the SPL header

 Kconfig                               |  22 ++-
 Makefile                              |  20 +++
 arch/arm/include/asm/arch-sunxi/spl.h |  19 ++-
 arch/arm/lib/Makefile                 |   4 +-
 board/sunxi/Kconfig                   |   4 +
 board/sunxi/README.pine64             | 177 +++++++++++++-------
 board/sunxi/board.c                   |  36 +++-
 board/sunxi/mksunxi_fit_atf.sh        |  73 +++++++++
 common/spl/spl_fit.c                  | 298 ++++++++++++++++++++++------------
 configs/am335x_evm_defconfig          |   1 -
 configs/evb-rk3399_defconfig          |   1 -
 configs/orangepi_pc2_defconfig        |   1 +
 configs/pine64_plus_defconfig         |   1 +
 doc/uImage.FIT/howto.txt              |  21 +++
 include/configs/sunxi-common.h        |  17 +-
 scripts/Makefile.spl                  |   3 +-
 tools/mksunxiboot.c                   |  53 +++++-
 17 files changed, 562 insertions(+), 189 deletions(-)
 create mode 100755 board/sunxi/mksunxi_fit_atf.sh

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2.8.2