Re: [PATCH 1/4] of: Add support for linking device tree blobs into vmlinux
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: 2010-12-23 06:14:24
Also in:
linux-arch, linux-devicetree, linux-kbuild, lkml
2010/12/22 Michal Marek [off-list ref]:
On 22.12.2010 20:57, dirk.brandewie@gmail.com wrote:quoted
From: Dirk Brandewie<redacted> This patch adds support for linking device tree blob(s) into vmlinux. Modifies asm-generic/vmlinux.lds.h to add linking .dtb sections into vmlinux. To maintain compatiblity with the of/fdt driver code platforms MUST copy the blob to a non-init memory location before the kernel frees the .init.* sections in the image. Modifies scripts/Makefile.lib to add a kbuild command to compile DTS files to device tree blobs and a rule to create objects to wrap the blobs for linking. STRUCT_ALIGNMENT is defined in vmlinux.lds.h for use in the rule to create wrapper objects for the dtb in Makefile.lib. =C2=A0The STRUCT_ALIGN() macro in vmlinux.lds.h is modified to use the STRUCT_ALIGNMENT definition. The DTB's are placed on 32 byte boundries to allow parsing the blob with driver/of/fdt.c during early boot without having to copy the blob to get the structure alignment GCC expects. A DTB is linked in by adding the DTB object to the list of objects to be linked into vmlinux in the archtecture specific Makefile using =C2=A0 =C2=A0obj-y +=3D foo.dtb.o Signed-off-by: Dirk Brandewie<redacted>Hi, you can add Acked-by: Michal Marek <redacted> but I thing this series should go through the tip tree, as your primary target seems to be x86 and patch 2/4 depends on the ce4100 code that is o=
nly
in tip.
If the two lines
+# device tree blob
+obj-$(CONFIG_X86_INTEL_CE) +=3D ce4100.dtb.o
are removed, patch 2/4 no longer depends on the ce4100 code.
The summary and description for that patch don't mention anything
about ce4100 anyway.
Gr{oetje,eeting}s,
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k=
.org
In personal conversations with technical people, I call myself a hacker. Bu=
t
when I'm talking to journalists I just say "programmer" or something like t=
hat.
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0=C2=A0 -- Linus Torvalds