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This commit adds Initramfs bundle support to the FIT image in addition to u-boot boot script capability. These new features are selectable. In case of Initramfs, the kernel is configured to be bundled with the rootfs in the same binary (ie: zImage-initramfs-<machine>.bin). When the kernel is copied to RAM and executed, it unpacks the Initramfs rootfs. For more information about Initramfs please read: https://www.kernel.org/doc/Documentation/filesystems/ramfs-rootfs-initramfs.txt For more details about the Initramfs bundle and boot script implementation please check the kernel-fitimage.bbclass paragraph in Yocto reference or mega manual. Current limitations: - Initramfs bundle FIT support has been tested on ARM 32-bit - The kernel image type in case of ARM 32-bit is zImage Change-Id: I901bfd899e8d733c5b9a2b6645b1d4748f4b1fda (From OE-Core rev: e3eb79c0a11e9f67af3161361fb88b00123ecbac) Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Backport of 19fa415c8769a67b52babd80f71d68bf36a21db2 in master branch Signed-off-by: Remi Peuvergne <remi.peuvergne@non.se.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.