diff options
| author | Dirk Brandewie <dirk.brandewie@gmail.com> | 2010-12-22 22:57:26 +0300 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-12-24 00:43:00 +0300 |
| commit | aab94339cd85d726abeae78fc02351fc1910e6a4 (patch) | |
| tree | 25d434a1dec4f758a9938e621dc1516f7a788521 /Documentation/atomic_ops.txt | |
| parent | cfb13c5db08c90311a5defdde9a0328ee788cca5 (diff) | |
| download | linux-aab94339cd85d726abeae78fc02351fc1910e6a4.tar.xz | |
of: Add support for linking device tree blobs into vmlinux
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. The
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
obj-y += foo.dtb.o
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Michal Marek <mmarek@suse.cz>
[grant.likely@secretlab.ca: cleaned up whitespace inconsistencies]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/atomic_ops.txt')
0 files changed, 0 insertions, 0 deletions