buildroot/arch, branch 2017.02

arch: add OpenRISC architecture support

2017-01-25T21:53:53+00:00

Add support for OpenRISC. See here for more details about OpenRISC http://openrisc.io. All buildroot included upstream binutils versions are supported. Gcc support is not upstream, to be able to enable musl C library support later, we use the branch with musl support. At the moment it is possible to build a musl based toolchain, but bootup in Qemu fails. Gdb is only working to debug bare-metal code, there is no support for gdbserver/gdb on Linux, yet. [Peter: drop ?= for GCC_SOURCE] Signed-off-by: Waldemar Brodkorb Tested-by: Romain Naour Signed-off-by: Peter Korsgaard

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

arch/Config.in.arm: add FPU related options for ARMv8 cores

2016-12-05T22:07:10+00:00

The ARMv8 cores have a mandatory FPU unit called FP-ARMv8, so we: - add a new hidden Config.in option for the availability of this unit (BR2_ARM_CPU_HAS_FP_ARMV8) - allow the selection of a possible choice in the "Floating point strategy", and add two new choices: BR2_ARM_FPU_FP_ARMV8 and BR2_ARM_FPU_NEON_FP_ARMV8. - specify the -mfpu values for BR2_ARM_FPU_FP_ARMV8 and BR2_ARM_FPU_NEON_FP_ARMV8 cases, when used on ARM 32 bits (-mfpu doesn't exist on ARM64, instead -mcpu modifiers are used, so they will be added on a per-core basis). Signed-off-by: Thomas Petazzoni [yann.morin.1998@free.fr: drop the FP strategy dependency] Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni

arch/arm: drop legacy dependency for floating point strategy

2016-12-05T22:07:09+00:00

The floating point strategy currently depends on EABI || EABIHF. The reason was that, wayback when we also supported OABI, we only exposed FP for EABI or EABIHF, and hide it for OABI, which did not support FP. It's been a while now that we do not support OABI, but the dependency stuck all along. Remove it as it is no longer needed, and is always true. However, the choice is empty for AArch64, as we still have no entry for their floating point strategy yet. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

arch/Config.in.arm: add BR2_ARM_CPU_ARMV8

2016-12-05T22:07:08+00:00

In order to prepare the addition of ARM64 cores, add the blind BR2_ARM_CPU_ARMV8 option. Signed-off-by: Thomas Petazzoni Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni