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.
IMPORTANT NOTE:
The whole set has been build-tested across all ARM targets and no build regression was detected.
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, 4 and 5 have been build-tested BUT HAVE NOT BEEN RUN-TESTED.
********************************************************* Open-RD and Tricorder owners, PLEASE run-test this series and report on the mailing list whether the target works. *********************************************************
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 kirkwood: support CONFIG_SYS_THUMB_BUILD openrd: switch to CONFIG_SYS_THUMB_BUILD tricorder: switch to CONFIG_SYS_THUMB_BUILD
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/Makefile | 6 +++ arch/arm/mach-orion5x/Makefile | 10 ++++ arch/arm/thumb1/include/asm/proc-armv/system.h | 69 ++++++++++++++++++++++++++ examples/standalone/Makefile | 10 ++++ include/configs/openrd.h | 1 + include/configs/stm32f429-discovery.h | 1 + include/configs/tricorder.h | 1 + scripts/Makefile.lib | 3 +- 17 files changed, 165 insertions(+), 4 deletions(-) create mode 100644 arch/arm/thumb1/include/asm/proc-armv/system.h