kernel: Separate out uboot_prep_kimage

Separate the function which prepares the kernel for packing into
uImage into separate class, so this function can be reused by the
fitImage class.

(From OE-Core rev: 2d1f700ad098c942834524891ccc90e3a391a09f)

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Koen Kooi <koen@dominion.thruhere.net>
Cc: Paul Eggleton <paul.eggleton@linux.intel.com>
Cc: Ross Burton <ross.burton@intel.com>
Cc: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/meta/classes/kernel-uboot.bbclass b/meta/classes/kernel-uboot.bbclass
new file mode 100644
index 0000000000..8ab30b8649
--- /dev/null
+++ b/meta/classes/kernel-uboot.bbclass
@@ -0,0 +1,21 @@
+uboot_prep_kimage() {
+        if test -e arch/${ARCH}/boot/compressed/vmlinux ; then
+                vmlinux_path="arch/${ARCH}/boot/compressed/vmlinux"
+                linux_suffix=""
+                linux_comp="none"
+        else
+                vmlinux_path="vmlinux"
+                linux_suffix=".gz"
+                linux_comp="gzip"
+        fi
+
+        ${OBJCOPY} -O binary -R .note -R .comment -S "${vmlinux_path}" linux.bin
+
+        if [ "${linux_comp}" != "none" ] ; then
+                rm -f linux.bin
+                gzip -9 linux.bin
+                mv -f "linux.bin${linux_suffix}" linux.bin
+        fi
+
+        echo "${linux_comp}"
+}