[Buildroot] [PATCH] configs: add raspberrypi3 64bits defconfig

[Martin Bark]

Gaël,

Thanks for working on this.  I was about to do this so you saved me a job :)

On 15 April 2017 at 12:37, Gaël PORTAY <gael.portay at savoirfairelinux.com>
wrote:

> This configuration builds a 64bit image for RaspberryPi 3.
>
> Signed-off-by: Gaël PORTAY <gael.portay at savoirfairelinux.com>
> ---
>
> Changes since v1:
> - Symlink raspberrypi3-64 and update BR2_ROOTFS_POST_[BUILD|IMAGE]_SCRIPT
> - Add BR2_cortex_a53 architecture
> - Set BR2_TARGET_ROOTFS_EXT2_BLOCKS to 120000
> - Update kernel repository version
>
>  board/raspberrypi/genimage-raspberrypi3-64.cfg | 31 +++++++++++++++++++++
>  board/raspberrypi/post-image.sh                | 20 ++++++++++++++
>  board/raspberrypi3-64                          |  1 +
>  configs/raspberrypi3_64_defconfig              | 38
> ++++++++++++++++++++++++++
>  4 files changed, 90 insertions(+)
>  create mode 100644 board/raspberrypi/genimage-raspberrypi3-64.cfg
>  create mode 120000 board/raspberrypi3-64
>  create mode 100644 configs/raspberrypi3_64_defconfig
>
> diff --git a/board/raspberrypi/genimage-raspberrypi3-64.cfg
> b/board/raspberrypi/genimage-raspberrypi3-64.cfg
> new file mode 100644
> index 000000000..c5f86527d
> --- /dev/null
> +++ b/board/raspberrypi/genimage-raspberrypi3-64.cfg
> @@ -0,0 +1,31 @@
> +image boot.vfat {
> +  vfat {
> +    files = {
> +      "bcm2710-rpi-3-b.dtb",
> +      "bcm2837-rpi-3-b.dtb",
> +      "rpi-firmware/bootcode.bin",
> +      "rpi-firmware/cmdline.txt",
> +      "rpi-firmware/config.txt",
> +      "rpi-firmware/fixup.dat",
> +      "rpi-firmware/start.elf",
> +      "Image"
> +    }
> +  }
> +  size = 32M
> +}
> +
> +image sdcard.img {
> +  hdimage {
> +  }
> +
> +  partition boot {
> +    partition-type = 0xC
> +    bootable = "true"
> +    image = "boot.vfat"
> +  }
> +
> +  partition rootfs {
> +    partition-type = 0x83
> +    image = "rootfs.ext4"
> +  }
> +}
> diff --git a/board/raspberrypi/post-image.sh b/board/raspberrypi/post-
> image.sh
> index b2bb07067..de972998b 100755
> --- a/board/raspberrypi/post-image.sh
> +++ b/board/raspberrypi/post-image.sh
> @@ -16,6 +16,26 @@ dtoverlay=pi3-miniuart-bt
>  __EOF__
>         fi
>         ;;
> +       --aarch64)

+       # Run a 64bits kernel (armv8)
> +       sed -e '/^kernel=/s,=.*,=Image,' -i "${BINARIES_DIR}/rpi-firmware/
> config.txt"
> +       if ! grep -qE '^arm_control=0x200' "${BINARIES_DIR}/rpi-firmware/config.txt";
> then
> +               cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/
> config.txt"
> +
> +# enable 64bits support
> +arm_control=0x200
> +__EOF__
> +       fi
> +
> +       # Enable uart console
> +       if ! grep -qE '^enable_uart=1' "${BINARIES_DIR}/rpi-firmware/config.txt";
> then
> +               cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/
> config.txt"
> +
> +# enable rpi3 ttyS0 serial console
> +enable_uart=1
> +__EOF__
> +       fi
> +       ;;
>  esac
>
>  rm -rf "${GENIMAGE_TMP}"
> diff --git a/board/raspberrypi3-64 b/board/raspberrypi3-64
> new file mode 120000
> index 000000000..fcdafc81e
> --- /dev/null
> +++ b/board/raspberrypi3-64
> @@ -0,0 +1 @@
> +raspberrypi
> \ No newline at end of file
> diff --git a/configs/raspberrypi3_64_defconfig b/configs/raspberrypi3_64_
> defconfig
> new file mode 100644
> index 000000000..f5839dc49
> --- /dev/null
> +++ b/configs/raspberrypi3_64_defconfig
> @@ -0,0 +1,38 @@
> +BR2_aarch64=y
> +BR2_cortex_a53=y
>

The rpi3 has a VFPv4 floating point unit so i think we also
need BR2_ARM_FPU_VFPV4=y

Thanks

Martin


> +
> +BR2_GCC_VERSION_6_X=y
> +BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
> +BR2_TOOLCHAIN_BUILDROOT_CXX=y
> +
> +BR2_SYSTEM_DHCP="eth0"
> +
> +# Linux headers same as kernel, a 4.9 series
> +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
> +
> +BR2_LINUX_KERNEL=y
> +BR2_LINUX_KERNEL_CUSTOM_GIT=y
> +BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/
> raspberrypi/linux.git"
> +BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="5e4ee836560d4c0371e109bf469e1a
> d808ae7a44"
> +BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi3"
> +
> +# Build the DTB from the kernel sources
> +BR2_LINUX_KERNEL_DTS_SUPPORT=y
> +BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2710-rpi-3-b
> broadcom/bcm2837-rpi-3-b"
> +
> +BR2_PACKAGE_RPI_FIRMWARE=y
> +# BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
> +
> +# Required tools to create the SD image
> +BR2_PACKAGE_HOST_DOSFSTOOLS=y
> +BR2_PACKAGE_HOST_GENIMAGE=y
> +BR2_PACKAGE_HOST_MTOOLS=y
> +
> +# Filesystem / image
> +BR2_TARGET_ROOTFS_EXT2=y
> +BR2_TARGET_ROOTFS_EXT2_4=y
> +BR2_TARGET_ROOTFS_EXT2_BLOCKS=120000
> +# BR2_TARGET_ROOTFS_TAR is not set
> +BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3-64/post-build.sh"
> +BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi3-64/post-image.sh"
> +BR2_ROOTFS_POST_SCRIPT_ARGS="--aarch64"
> --
> 2.12.1
>
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