[Buildroot] [PATCH 0/8] arch/arm: allow selecting AArch64 cores
Yann E. MORIN
yann.morin.1998 at free.fr
Wed Nov 30 21:12:06 UTC 2016
Hello All!
This series, originally written by Thomas, allows selecting a specific
AArch64 core anong the few currently existing cores. It also allows
selecting those cores in 32-bit mode.
The series now handles arm (aka AArch32) and AArch64 as a single
architecture, not unlike what we do for the i386 and x86-64.
We so far had no way to optimise for a specific AArch64 core, and would
just let gcc decide based on its default settings. Having a selection,
like we have for all architectures, allows to optimise the generated
code for the actual core on the target.
Furthermore, AArch64 cores are totally capable of running 32-bit code,
in 32-bit mode, like x86_64 cores do in 32-bit mode.
Then, we also allow to select the floating point strategy for those
cores. Unlike 32-bit cores, all current AArch64 core have a VFP unit
with NEON extensions; yet, we still allow selecting soft-float (e.g.
when in 32-bit mode, to keep compatibility with soft-float binary
blobs).
Finally, we add an entry for each of the three currently existing
AArch64 cores, Cortex-A53, A57 and A72.
Regards,
Yann E. MORIN.
The following changes since commit 0689e77eecb88dc204688e9db670d56e4366f83f
uclibc: disable posix_madvise for noMMU (2016-11-30 16:14:47 +0100)
are available in the git repository at:
git://git.buildroot.org/~ymorin/git/buildroot.git
for you to fetch changes up to 7cdaae6e62c3a98dceecd5b195ef16f425621cee
arch/Config.in.arm: add Cortex-A57 and Cortex-A72 (2016-11-30 18:57:14 +0100)
----------------------------------------------------------------
Matt Flax (1):
arch/Config.in.arm: Add Cortex-A53 CPU
Thomas Petazzoni (6):
arch: merge Config.in.aarch64 into Config.in.arm
arch/Config.in.arm: prepare addition of 64 bits cores
arch/Config.in.arm: add BR2_ARM_CPU_ARMV8
arch/Config.in.arm: add FPU related options for ARMv8 cores
arch/Config.in.arm: specify ABI for ARM64
arch/Config.in.arm: add Cortex-A57 and Cortex-A72
Yann E. MORIN (1):
arch/arm: drop legacy dependency for floating point strategy
arch/Config.in | 6 +---
arch/Config.in.aarch64 | 7 ----
arch/Config.in.arm | 93 ++++++++++++++++++++++++++++++++++++++++++++++----
3 files changed, 87 insertions(+), 19 deletions(-)
delete mode 100644 arch/Config.in.aarch64
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