Yocto Layers

The Armv8-R AArch64 software stack is provided through the v8r64 repository. The v8r64 repository provides a Yocto Project compatible layer – meta-armv8r64-extras – with target platform (fvp-baser-aemv8r64) extensions for Armv8-R AArch64. Currently this layer extends the fvp-baser-aemv8r64 machine definition from the meta-arm-bsp layer in the meta-arm repository.

The following diagram illustrates the layers which are integrated in the software stack, which are further expanded below.

• poky layers (meta, meta-poky)

  • URL: https://git.yoctoproject.org/poky/?h=kirkstone

  • Provides the base configuration, including the ‘poky’ distro.

• meta-arm layers (meta-arm-bsp, meta-arm, meta-arm-toolchain)

  • URL: https://git.yoctoproject.org/meta-arm/?h=kirkstone

  • meta-arm-bsp contains the board support to boot baremetal Linux for the fvp-baser-aemv8r64 machine. It includes

    • The base device tree

    • Machine-specific boot-wrapper-aarch64 patches

    • Machine-specific U-Boot patches

  • meta-arm contains:

    • A recipe for the FVP_Base_AEMv8R model itself

    • The base recipe for boot-wrapper-aarch64

  • meta-arm-toolchain is not used, but is a dependency of meta-arm.

• meta-virtualization

  • URL: https://git.yoctoproject.org/meta-virtualization/?h=kirkstone

  • Included for the virtualization stack only.

• meta-openembedded layers (meta-oe, meta-python, meta-filesystems, meta-networking)

  • URL: http://git.openembedded.org/meta-openembedded?h=kirkstone

  • These are dependencies of meta-virtualization, so are included for the virtualization stack only.