buildroot/arch/Config.in.arm, branch 2017.11

arch/arm: add big.LITTLE cpu variants

2017-07-22T21:29:24+00:00

The big.LITTLE configurations can be optimised for by gcc, and a few users wonder what they should choose when they have such CPUs. Add new entries for those big.LITTLE configurations. Note: the various combos were added in various gcc versions, but only really worked in later versions: Variant | Introduced in | First built in ----------+---------------+---------------- a15-a7 | 4.9 | 4.9 a17-a7 | 5 | 5 a57-a53 | 4.9 | 6 a72-a53 | 5 | 6 Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Cc: Thomas De Schampheleire Cc: Baruch Siach Signed-off-by: Thomas Petazzoni

arch/arm: fix -mcpu default values for AArch64

2017-07-10T16:04:16+00:00

We have to specify the -mcpu value, even in 64-bit mode. For AArch64, +fp and +simd are the default, so they are totally useless. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Cc: Baruch Siach Signed-off-by: Thomas Petazzoni

arch, linux, package: remove whitespaces

2017-03-29T21:30:37+00:00

Whitespaces were searched using the following regex: [ ]{1,}\t and then manually removed in most of the cases. For xserver_xorg-server.mk, tabs before backslashes were removed. Signed-off-by: Bernd Kuhls Signed-off-by: Thomas Petazzoni

arch: add BR2_READELF_ARCH_NAME hidden config option

2017-03-20T21:22:17+00:00

This config option corresponds to the string returned by readelf for the "Machine" field of the ELF header. It will be used to check if the architecture of binaries built by Buildroot match the target architecture. Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: support thumb2 instructions for ARMv8 in 32bit mode

2016-12-08T21:32:17+00:00

The ARMv8 cores all support thumb2 instructions when running in aarch32 mode. Signed-off-by: Peter Korsgaard Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: only enable BR2_ARM_CPU_HAS_NEON for ARMv8 in 32bit mode

2016-12-08T21:32:16+00:00

A number of packages use BR2_ARM_CPU_HAS_NEON to know if the target handles aarch32 neon instructions, which is only true for ARMv8 cores when they are running in 32bit mode. Notice: These cores do support neon-like instructions using a different encoding in 64bit mode (it is a required part of ARMv8, similar to the FPU). Signed-off-by: Peter Korsgaard Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: only enable BR2_ARM_CPU_HAS_ARM for ARMv8 in 32bit mode

2016-12-08T21:32:14+00:00

Fixes: http://autobuild.buildroot.net/results/5e6/5e67cc067a06f7364cde1a8393ea72608fe7fef1/ A number of packages use BR2_ARM_CPU_HAS_ARM to know if the target handles classic A32 instructions, which is only true for ARMv8 cores when they are running in 32bit mode. Signed-off-by: Peter Korsgaard Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: add Cortex-A57 and Cortex-A72

2016-12-05T22:07:14+00:00

Add two popular ARM64 cores to the list of supported cores: Cortex-A57 and Cortex-A72. Signed-off-by: Thomas Petazzoni Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: Add Cortex-A53 CPU

2016-12-05T22:07:13+00:00

Adds the Cortex-A53 CPU to the target architecture variant choice. This sets the toolchain to use Cortex-A53 as the target. The effect is that various Cortex-A53 tunings are enabled for the compilation of packages. Signed-off-by: Matt Flax Signed-off-by: Thomas Petazzoni Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: specify ABI for ARM64

2016-12-05T22:07:11+00:00

There's currently only one widely supported ABI for ARM64, called lp64, so we define BR2_GCC_TARGET_ABI to the appropriate value. Note that there is another ABI for ARM64 being worked on, ilp32, but its support is not fully upstream in the kernel, so we're not adding support for it for the moment. Signed-off-by: Thomas Petazzoni Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni