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INITRD var: make it a list of filesystem images

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The initrd image used by the Linux kernel is list of file system images
concatenated together and presented as a single initrd file at boot time.

So far the initrd is a single filesystem image. But in cases like to support
early microcode loading, the initrd image need to have multiple filesystem
images concatenated together.

This commit is extending the INITRD variable from a single filesystem image
to a list of filesystem images to satisfy the need mentioned above.

(From OE-Core rev: b0ac481dda99d8f4be8015964fcb2cb01afce08c)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Nitin A Kamble
2014-07-29 11:34:45 -07:00
committed by Richard Purdie
parent 463c9f4d3a
commit 3b19f90bdf
5 changed files with 35 additions and 11 deletions
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meta/classes/bootimg.bbclass
+22 -5
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@@ -18,7 +18,7 @@
# an hdd)
# External variables (also used by syslinux.bbclass)
# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
# ${COMPRESSISO} - Transparent compress ISO, reduce size ~40% if set to 1
# ${NOISO} - skip building the ISO image if set to 1
# ${NOHDD} - skip building the HDD image if set to 1
@@ -67,9 +67,17 @@ populate() {
# Install bzImage, initrd, and rootfs.img in DEST for all loaders to use.
install -m 0644 ${STAGING_KERNEL_DIR}/bzImage ${DEST}/vmlinuz
if [ -n "${INITRD}" ] && [ -s "${INITRD}" ]; then
install -m 0644 ${INITRD} ${DEST}/initrd
# initrd is made of concatenation of multiple filesystem images
if [ -n "${INITRD}" ]; then
rm -f ${DEST}/initrd
for fs in ${INITRD}
do
if [ -s "${fs}" ]; then
cat ${fs} >> ${DEST}/initrd
fi
done
chmod 0644 ${DEST}/initrd
fi
if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
@@ -80,10 +88,19 @@ populate() {
build_iso() {
# Only create an ISO if we have an INITRD and NOISO was not set
if [ -z "${INITRD}" ] || [ ! -s "${INITRD}" ] || [ "${NOISO}" = "1" ]; then
if [ -z "${INITRD}" ] || [ "${NOISO}" = "1" ]; then
bbnote "ISO image will not be created."
return
fi
# ${INITRD} is a list of multiple filesystem images
for fs in ${INITRD}
do
if [ ! -s "${fs}" ]; then
bbnote "ISO image will not be created. ${fs} is invalid."
return
fi
done
populate ${ISODIR}