compulab-pxa270 2.6.16: add task to create a kernel image file.

The cm-x270 bootloader requires kernel image files in a special
format and this addition adds that.

1 files changed, 28 insertions, 15 deletions

diff --git a/packages/linux/compulab-pxa270_2.6.16.bb b/packages/linux/compulab-pxa270_2.6.16.bb
index 6e09281546..043fc22777 100644
--- a/packages/linux/compulab-pxa270_2.6.16.bb
+++ b/packages/linux/compulab-pxa270_2.6.16.bb
@@ -1,7 +1,7 @@
 SECTION = "kernel"
 DESCRIPTION = "Linux kernel for the Compulab PXA270 system"
 LICENSE = "GPL"
-PR = "r3"
+PR = "r4"
 
 # Note, the compulab package contains a binary NAND driver that is not
 # EABI compatible
@@ -32,25 +32,38 @@ do_deploy() {
 	KNAME=${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin
         install -d ${DEPLOY_DIR_IMAGE}
         install -m 0644 arch/${ARCH}/boot/${KERNEL_IMAGETYPE} ${KNAME}
-	# Create an image file that has the size prepended (used by cm-x270 BL)
-	# The following can only be done on a little endian machine
-	# the following does not work on all computers as it requires a recent
-	# version of coreutils (>= 6.0).  We will eventually replace the following
-	# with python code.
-	#size=$(stat --printf=%s ${KNAME})
-	#size_=$(printf '\%03o'\
-	#$((size & 0x000000FF))\
-	#$((size>>8 & 0x000000FF))\
-	#$((size>>16 & 0x000000FF))\
-	#$((size>>24 & 0x000000FF)))
-	#size_=${size_}'\c'
-	#echo -e $size_ > ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}-${DATETIME}.img
-	#cat ${KNAME} >> ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}-${DATETIME}.img
 }
 
+python do_compulab_image() {
+	import os
+	import os.path
+	import struct
+
+	deploy_dir = bb.data.getVar('DEPLOY_DIR_IMAGE', d, 1)
+	kernel_name = os.path.join(deploy_dir, bb.data.expand('${KERNEL_IMAGETYPE}-${MACHINE}.bin', d))
+
+	img_file = os.path.join(deploy_dir, 'zImage-compulab-pxa270.img')
+
+	fo = open(img_file, 'wb')
+
+	image_data = open(kernel_name, 'rb').read()
+
+	# first write size into first 4 bytes
+	size_s = struct.pack('i', len(image_data))
+
+	# truncate size if we are running on a 64-bit host
+	size_s = size_s[:4]
+
+	fo.write(size_s)
+	fo.write(image_data)
+	fo.close()
+}
+
+
 do_deploy[dirs] = "${S}"
 
 addtask deploy before do_build after do_compile
+addtask compulab_image before do_build after do_deploy
 
 COMPATIBLE_MACHINE = "compulab-pxa270"