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diff --git a/meta-seattle/README b/meta-seattle/README new file mode 100644 index 00000000..0454cd58 --- /dev/null +++ b/meta-seattle/README @@ -0,0 +1,114 @@ +meta-seattle +============ + +This is the location for AMD Seattle maintained BSP. + + +Overview of AMD 64-bit ARM-based processor +------------------------------------------ + +The AMD Opteron A1100-Series features AMDs first 64-bit ARM-based processor, codenamed "Seattle". + + +Yocto Project Compatible +======================== + +This BSP is compatible with the Yocto Project as per the requirements +listed here: + + https://www.yoctoproject.org/webform/yocto-project-compatible-registration + +Dependencies +============ + +This layer depends on: + + URI: git://git.openembedded.org/bitbake + branch: master + + URI: git://git.openembedded.org/openembedded-core + layers: meta + branch: master + +Patches +======= + +Please submit any patches against this BSP to the maintainer and cc +the meta-amd mailing list (meta-amd@yoctoproject.org): + +Maintainer: Adrian Calianu <adrian.calianu@enea.com> + + +Table of Contents +================= + + I. Building the meta-seattle BSP layer + II. Booting the images +III. How to Run 32-bit Applications on aarch64 + IV. Limitations + + +I. Building the meta-seattle BSP layer +======================================= + +The following instructions require a Poky installation (or equivalent). + +Initialize a build using the 'oe-init-build-env' script in Poky. + $ source oe-init-build-env <build_dir> + +Once initialized configure bblayers.conf by adding the 'meta-seattle' layer. e.g.: + + BBLAYERS ?= " \ + <path to layer>/oe-core/meta \ + <path to layer>/meta-amd/meta-seattle \ + " + +To build a specific target BSP configure the associated machine in local.conf. +There are two machines defined in order to offer support for Little Endian ("seattle", +default machine) and Big Endian ("seattle-be"). + + MACHINE ?= "seattle" + +Build the target file system image using bitbake: + + $ bitbake core-image-minimal + +Once complete the images for the target machine will be available in the output +directory 'tmp/deploy/images'. + + +II. Booting the images +===================================== + +Booting the images using UEFI firmware + +At power-on, the UEFI firmware starts a UEFI bootloader which looks up the EFI +System Partition (ESP) for a script named startup.nsh. +If the script specifies an executable file in the ESP, that file is executed +as a UEFI application. + +If no UEFI application can be started, or if the boot process is interrupted +by ESC, the EFI Shell is started with prompt "Shell>". Here you can execute +shell commands or UEFI applications interactively. + +A UEFI application can be e.g. a Linux kernel built with an EFI stub. By executing +the EFI-stubbed kernel as an application with arguments, you can control +how to boot Linux, and which rootfs to use. + +Boot existing Linux images or install HDD on a different machine, +mount EFI partition and copy kernel image under this partition. + +Boot Linux images from UEFI shell with rootfs in RAM +Before that, copy rootfs under EFI partition(FAT). + +Shell> FS0:\Image initrd=\core-image-minimal.ext2.gz root=/dev/ram0 rw + console=ttyAMA0,115200n8 ramdisk_size=524280 + +Boot Linux images from UEFI shell with rootfs on a HDD ext2/3/4 partition. +Before that, install rootfs under a /dev/sda<X> ext2/3/4 formated partition. + +Shell> FS0:\Image root=/dev/sda<X> rw console=ttyAMA0,115200n8 + +References: +1) https://www.kernel.org/doc/Documentation/efi-stub.txt +2) http://www.uefi.org/specifications |