[U-Boot] [PATCH 00/24] sunxi: Allwinner A64: SPL support

[Andre Przywara]

Hi,

this series introduces SPL support for the Allwinner A64 SoC.
In contrast to the previous RFC this one includes support for both
AArch64 and AArch32 SPL builds.
Still the FIT support is missing, which means the functionality is
limited. Due to the missing ARM Trusted Firmware (ATF) in this firmware
chain one loses Ethernet and SMP, among other minor things.
I will send the FIT support later on top of this.

The first two patches are fixes that I sent out before, not sure if they
landed somewhere already.
Patch 2-8 prepare the SPL code to be compiled for 64-bit in general and
AArch64 in particular.
Patch 9-11 refactor the existing boot0 header functionality to be used
by patch 12, which introduces the 64-bit switch in the first SPL
instructions.
Patches 13-18 then introduce the actual core of the SPL support: the DRAM
initialization, courtesy of Jens. This piggy backs on the existing
H3 DRAM code, deviating where needed.
Patch 19 finally enables the 64-bit SPL support. So now building the
existing pine64_plus_defconfig will generate a sunxi-spl.bin, which
can be prepended to the U-Boot proper image (not .bin) to boot from
an SD card. Due to the missing ATF support this is of limited usability
at the moment, though. Also FEL support requires more love - to switch
back to AArch32 before returning to FEL (without crashing, that is ;-),
so this is disabled.
On my setup this results in a 26KB SPL binary, which is close to the
28K limit mksunxiboot imposes at the moment. Adding anything (like
FIT support or DEBUG) will exceed this, and although I have patches
to let mksunxiboot get close to 32KB, this is the ulimate frontier.

So patches 20-23 then teach the SPL how to detect an U-Boot image file
of a different bitness and do the RMR switch from AArch32 to AArch64,
if needed.
This is used by the final patch 24, which creates another _defconfig
to let the SPL compile for AArch32 using the Thumb2 encoding. This
results in a binary of less than 17KB in my case, so has plenty of
room for extensions.

I know this is nasty stuff, so I appreciate any comments.

Cheers,
Andre.

Andre Przywara (21):
  drivers: SPI: sunxi SPL: fix warning
  sun6i: Restrict some register initialization to Allwinner A31 SoC
  armv8: prevent using THUMB
  armv8: add lowlevel_init.S
  SPL: tiny-printf: add "l" modifier
  move UL() macro from armv8/mmu.h into common.h
  SPL: make struct spl_image 64-bit safe
  armv8: add simple sdelay implementation
  armv8: move reset branch into boot hook
  ARM: boot0 hook: remove macro, include whole header file
  sunxi: introduce extra config option for boot0 header
  sunxi: A64: do an RMR switch if started in AArch32 mode
  sunxi: provide default DRAM config for sun50i in Kconfig
  sunxi: H3/A64: fix non-ODT setting
  sunxi: DRAM: fix H3 DRAM size display on aarch64
  sunxi: A64: enable SPL
  SPL: read and store arch property from U-Boot image
  Makefile: use "arm64" architecture for U-Boot image files
  ARM: SPL/FIT: differentiate between arm and arm64 arch properties
  sunxi: introduce RMR switch to enter payloads in 64-bit mode
  sunxi: A64: add 32-bit SPL support

Jens Kuske (3):
  sunxi: H3: add and rename some DRAM contoller registers
  sunxi: H3: add DRAM controller single bit delay support
  sunxi: A64: use H3 DRAM initialization code for A64

 Makefile                                        |   9 +-
 arch/arm/cpu/armv7/omap-common/boot-common.c    |   2 +-
 arch/arm/cpu/armv8/Makefile                     |   1 +
 arch/arm/cpu/armv8/cpu.c                        |  13 ++
 arch/arm/cpu/armv8/lowlevel_init.S              |  44 +++++
 arch/arm/cpu/armv8/start.S                      |   5 +-
 arch/arm/include/asm/arch-bcm235xx/boot0.h      |   8 +-
 arch/arm/include/asm/arch-bcm281xx/boot0.h      |   8 +-
 arch/arm/include/asm/arch-sunxi/boot0.h         |  34 +++-
 arch/arm/include/asm/arch-sunxi/clock_sun6i.h   |   1 +
 arch/arm/include/asm/arch-sunxi/dram.h          |   2 +-
 arch/arm/include/asm/arch-sunxi/dram_sun8i_h3.h |  51 +++---
 arch/arm/include/asm/armv8/mmu.h                |   8 -
 arch/arm/lib/Makefile                           |   2 +
 arch/arm/lib/spl.c                              |  15 ++
 arch/arm/lib/vectors.S                          |   1 -
 arch/arm/mach-sunxi/Makefile                    |   2 +
 arch/arm/mach-sunxi/board.c                     |   2 +-
 arch/arm/mach-sunxi/clock_sun6i.c               |   7 +-
 arch/arm/mach-sunxi/dram_sun8i_h3.c             | 215 +++++++++++++++++-------
 arch/arm/mach-sunxi/spl_switch.c                |  60 +++++++
 arch/arm/mach-tegra/spl.c                       |   2 +-
 board/sunxi/Kconfig                             |  32 +++-
 common/spl/spl.c                                |   9 +-
 common/spl/spl_fit.c                            |   8 +
 common/spl/spl_mmc.c                            |   2 +-
 configs/pine64_plus_defconfig                   |   6 +-
 configs/sun50i_spl32_defconfig                  |  11 ++
 drivers/mtd/spi/sunxi_spi_spl.c                 |   3 +-
 include/common.h                                |  10 +-
 include/configs/sunxi-common.h                  |   4 +-
 include/spl.h                                   |  19 ++-
 lib/tiny-printf.c                               |  43 +++--
 33 files changed, 488 insertions(+), 151 deletions(-)
 create mode 100644 arch/arm/cpu/armv8/lowlevel_init.S
 create mode 100644 arch/arm/mach-sunxi/spl_switch.c
 create mode 100644 configs/sun50i_spl32_defconfig

-- 
2.8.2