Re: [PATCH v2 3/3] powerpc: Add support for ram filesystems in FIT uImages
From: Grant Likely <hidden>
Date: 2009-12-30 23:02:53
Also in:
linux-kbuild
On Mon, Dec 21, 2009 at 6:50 PM, Peter Tyser [off-list ref] wrote:
The PowerPC architecture has the ability to embed the ramdisk located at arch/powerpc/boot/ramdisk.image.gz into a bootable kernel image. =A0If the bootable kernel is in the Flattened Image Tree (FIT) format, the ramdisk should be a node in the tree instead of being embedded directly in the kernel executable. A FIT uImage with a ram filesystem can be generated using the command: "make uImage.fit.initrd.<boardname>" where <boardname> is one of arch/powerpc/boot/dts/<boardname>.dts. =A0The command will generate a FIT uImage at arch/powerpc/boot/uImage.fit.initrd.<boardname> that contains a kernel image, device tree blob, and a ram filesystem. The ramdisk at arch/powerpc/boot/ramdisk.image.gz can either be an older style "ramdisk" or a newer "ramfs" gzipped cpio archive. Signed-off-by: Peter Tyser <ptyser@xes-inc.com> --- Changes since v1: - Don't strip leading 0x from dts ramdisk address =A0arch/powerpc/boot/Makefile | =A0 =A03 +++ =A0arch/powerpc/boot/wrapper =A0| =A0 20 ++++++++++++++++---- =A0scripts/mkits.sh =A0 =A0 =A0 =A0 =A0 | =A0 34 ++++++++++++++++++++++++=
++++++++--
quoted hunk ↗ jump to hunk
=A03 files changed, 51 insertions(+), 6 deletions(-)diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index e56ec21..c2a6591 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile@@ -313,6 +313,9 @@ $(obj)/uImage: vmlinux $(wrapperbits)=A0$(obj)/uImage.fit.%: vmlinux $(obj)/%.dtb $(wrapperbits) =A0 =A0 =A0 =A0$(call if_changed,wrap,uboot.fit,,$(obj)/$*.dtb) +$(obj)/uImage.fit.initrd.%: vmlinux $(obj)/%.dtb $(wrapperbits) + =A0 =A0 =A0 $(call if_changed,wrap,uboot.fit,,$(obj)/$*.dtb,$(obj)/ramd=
isk.image.gz)
+
IIRC, uImage.fit.initrd.% should appear before uImage.fit.% in the Makefile so that make behaves more consistently. Speaking of which, the number of '.' in the name is getting rather large. Would you consider using 'fitImage' instead of 'uImage.fit'? g.