[U-Boot] [PATCH v2 0/4] rockchip: rk3399: Update SPL generation for the RK3399

[Philipp Tomsich]

For the RK3399, which boots in AArch64 mode, the Boot ROM still starts
execution at the instruction following the SPL boot-magic
(i.e. 'RK33'). This puts the first executed instruction on an odd
address (+0x4).

However, we can't reasonably use for the start of the .text-section on
AArch64, as it would violate natural alignment... which in turn
invites trouble down the line if a linker assumes natural alignment or
some assembly snippet tries to be smart.

This series implements both approaches for dealing with this odd
alignment during SPL image creation:
* patches 1 and 2 take an SPL image which starts at (+0x8) and
  prepends it with a AArch64 'nop' during image assembly
* patches 3 and 4 change this to using a BOOT0_HOOK to insert a single
  4-byte word at the beginning of the SPL build to make space for the
  'RK33' magic and then have the mkimage-tool overwrite this word in
  the 'set_header' function.

In doing so, the rkimage code is refactored:
- to remove duplication between rksd.c and rkspi.c
- to dynamically allocate the space for headers from vrec

Changes in v2:
- Use BOOT0_HOOK to insert space into the SPL payload that can be
  overwritten with the boot magic (e.g. 'RK33') by rkimage
- Change rkimage to overwrite this padding for the RK3399 instead of
  inserting an artificial 'nop'

Philipp Tomsich (4):
  rockchip: mkimage: simplify start/size calculation for rc4_encode
  rockchip: mkimage: pad the header to 8-bytes (using a 'nop') for
    RK3399
  rockchip: spl: RK3399: use boot0 hook to create space for SPL magic
  rockchip: mkimage: update rkimage to support pre-padded payloads

 arch/arm/include/asm/arch-rockchip/boot0.h | 18 ++++++
 arch/arm/mach-rockchip/Kconfig             |  1 +
 include/configs/rk3399_common.h            |  2 +-
 tools/rkcommon.c                           | 90 ++++++++++++++++++++++++++----
 tools/rkcommon.h                           | 10 ++++
 tools/rksd.c                               | 17 ++----
 tools/rkspi.c                              | 17 ++----
 7 files changed, 119 insertions(+), 36 deletions(-)
 create mode 100644 arch/arm/include/asm/arch-rockchip/boot0.h

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1.9.1