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authorJulius Werner <jwerner@chromium.org>2014-01-13 13:24:30 -0800
committerMarc Jones <marc.jones@se-eng.com>2014-11-09 01:37:13 +0100
commit25a282dabc5fb656a1402c26920974d129ef7917 (patch)
treeac8c5e7638a59d0b1daced8746eb1704eefed092 /util/getpir/checksum.c
parenta38ccfdee1404211dbf3c43edf7b5b686a3a05fd (diff)
arm: Thumb ALL the things!
This patch switches every last part of Coreboot on ARM over to Thumb mode: libpayload, the internal libgcc, and assorted assembly files. In combination with the respective depthcharge patch, this will switch to Thumb mode right after the entry point of the bootblock and not switch back to ARM until the final assembly stub that jumps to the kernel. The required changes to make this work include some new headers and Makefile flags to handle assembly files (using the unified syntax and the same helper macros as Linux), modifying our custom-written libgcc code for 64-bit division to support Thumb (removing some stale old files that were never really used for clarity), and flipping the general CFLAGS to Thumb (some more cleanup there as well while I'm at it). BUG=None TEST=Snow and Nyan still boot. Original-Change-Id: I80c04281e3adbf74f9f477486a96b9fafeb455b3 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/182212 Original-Reviewed-by: Gabe Black <gabeblack@chromium.org> (cherry picked from commit 5f65c17cbfae165a95354146ae79e06c512c2c5a) Conflicts: payloads/libpayload/include/arm/arch/asm.h src/arch/arm/Makefile.inc src/arch/arm/armv7/Makefile.inc *** There is an issue with what to do with ramstage-S-ccopts, and *** will need to be covered in additional ARM cleanup patches. Change-Id: I80c04281e3adbf74f9f477486a96b9fafeb455b3 Signed-off-by: Marc Jones <marc.jones@se-eng.com> Reviewed-on: http://review.coreboot.org/6930 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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