[U-Boot] [PATCH v6 0/5] Add support for Thumb-1 builds

[Albert ARIBAUD]

This series implements essential changes for thumb-1 support and
activates thumb-1 build for openrd and tricorder as a proof of
concept as well as a fix to bring the image sizes of openrd and
tricorder targets back under an acceptable limit.

For other targets, some additional files might need to be forced to
ARM building, notably architecture-specific instances of lowlevel_init.S
or of cpu.c. This should be handled on a case-by-case basis.

This series has two unfixed checkpatch diagnostics:

warning: arch/arm/mach-kirkwood/Kconfig,7:
please write a paragraph that describes the config symbol fully

(no option in this Kconfig has help info)

check: board/Marvell/openrd/openrd.c,42: Avoid CamelCase: <MPP6_SYSRST_OUTn>

(this is actually not an OpenRD problem and will be fixed
in another patch)

IMPORTANT NOTE:

The whole set has been build-tested across all ARM targets
and no build regression was detected -- actually, the series
does fix the x600 board which otherwise fails assembling an
mcr instruction.

Patch 1 has been confirmed to be binary-invariant.

Patch 2 has been build- and run-tested on ED Mini V2 (switched
temporarily to Thumb build) and confirmed to be binary-invariant
for non-thumb target Wireless Space.

Patches 3 through 6 have been build-tested BUT HAVE NOT BEEN
RUN-TESTED so far.

I will test on OpenRD (client) before the end of the merge
window, but:

*********************************************************
Open-RD and Tricorder owners, PLEASE run-test this series
and report on the mailing list whether the target works.
*********************************************************

Changes in v6:
- revive OpenRD targets and assume maintainership
- switch OpenRD to generic board and Thumb
- fix checkpatch warning and checks

Changes in v5:
- switched tricorder[_flash] to Thumb-1 build

Changes in v4:
- Made stm32f429-discovery explicitly state that it builds
  for Thumb

Changes in v3:
- added arch/arm/lib/mem{set,cpy}.S to the list of modules
  which should always be built in ARM state.
- Selected HAS_THUMB2 for CPU_V7M.
- Fixed invalidate_l2_cache() when building for Thumb-1.

Changes in v2:
- fixed a typo in the commit message
- added file arch/arm/thumb1/include/asm/proc-armv/system.h,
  which overrides arch/arm/include/asm/proc-armv/system.h
  when building for Thumb-1 and provides non-functional but
  Thumb-compilable IRQ and FIQ related macros and functions.

Albert ARIBAUD (5):
  stm32f429-discovery: add CONFIG_SYS_THUMB_BUILD
  arm: support Thumb-1 with CONFIG_SYS_THUMB_BUILD
  tricorder: switch to CONFIG_SYS_THUMB_BUILD
  kirkwood: support CONFIG_SYS_THUMB_BUILD
  Revive OpenRD targets

 Makefile                                       |   2 +
 arch/arm/Kconfig                               |   5 +
 arch/arm/cpu/arm926ejs/Makefile                |  11 ++
 arch/arm/cpu/arm926ejs/cache.c                 |   5 +
 arch/arm/include/asm/cache.h                   |   4 +
 arch/arm/lib/Makefile                          |  24 ++++
 arch/arm/lib/cache.c                           |  11 ++
 arch/arm/lib/memcpy.S                          |   4 +-
 arch/arm/lib/memset.S                          |   2 +-
 arch/arm/mach-kirkwood/Kconfig                 |   4 +
 arch/arm/mach-kirkwood/Makefile                |   6 +
 arch/arm/mach-orion5x/Makefile                 |  10 ++
 arch/arm/thumb1/include/asm/proc-armv/system.h |  69 +++++++++++
 board/Marvell/openrd/Kconfig                   |  12 ++
 board/Marvell/openrd/MAINTAINERS               |  12 ++
 board/Marvell/openrd/Makefile                  |  14 +++
 board/Marvell/openrd/kwbimage.cfg              | 152 +++++++++++++++++++++++
 board/Marvell/openrd/openrd.c                  | 160 +++++++++++++++++++++++++
 board/Marvell/openrd/openrd.h                  |  30 +++++
 configs/openrd_base_defconfig                  |   7 ++
 configs/openrd_client_defconfig                |   7 ++
 configs/openrd_ultimate_defconfig              |   7 ++
 examples/standalone/Makefile                   |  10 ++
 include/configs/openrd.h                       | 140 ++++++++++++++++++++++
 include/configs/stm32f429-discovery.h          |   1 +
 include/configs/tricorder.h                    |   1 +
 26 files changed, 707 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/thumb1/include/asm/proc-armv/system.h
 create mode 100644 board/Marvell/openrd/Kconfig
 create mode 100644 board/Marvell/openrd/MAINTAINERS
 create mode 100644 board/Marvell/openrd/Makefile
 create mode 100644 board/Marvell/openrd/kwbimage.cfg
 create mode 100644 board/Marvell/openrd/openrd.c
 create mode 100644 board/Marvell/openrd/openrd.h
 create mode 100644 configs/openrd_base_defconfig
 create mode 100644 configs/openrd_client_defconfig
 create mode 100644 configs/openrd_ultimate_defconfig
 create mode 100644 include/configs/openrd.h

-- 
2.1.4