bcm2835-kernel-image: Add recipe to deal with prepending the 32KB header to the kerenl image.

* TODO: Clean up these recipes and merge -mkimage and -kernel-image.

recipes-bcm/kernel-image/bcm2835-kernel-image.bb

@@ -0,0 +1,17 @@
+DESCRIPTION = "Helper recipe to make the munged kernel.img image for the RaspberryPi."
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
+
+PR = "${MACHINE_KERNEL_PR}.0"
+DEPENDS = "bcm2835-bootfiles bcm2835-mkimage-native"
+
+S = "${WORKDIR}"
+
+addtask deploy before do_package after do_install
+
+do_deploy() {
+	install -d ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles
+	bcm2835-mkimage.py ${DEPLOY_DIR_IMAGE}/zImage-${MACHINE}.bin ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/kernel.img ${STAGING_BINDIR_NATIVE}/
+}
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"

recipes-bcm/kernel-image/bcm2835-mkimage.bb

@@ -0,0 +1,31 @@
+DESCRIPTION = "Tools to append 32KB binary header to kernel image."
+LICENSE = "proprietary-binary"
+PR = "${MACHINE_KERNEL_PR}.2"
+
+SECTION = "bootloader"
+
+LIC_FILES_CHKSUM = "file://LICENCE;md5=3d7292881293368c0a9f3bc521c2b87e"
+
+SRC_URI = " \
+        file://LICENCE \
+        file://bcm2835-args-uncompressed.txt \
+        file://bcm2835-boot-uncompressed.txt \
+        file://bcm2835-mkimage.py \
+        file://bcm2835-kernel-first32k.bin \        
+"
+
+S = "${WORKDIR}"
+
+BBCLASSEXTEND = "native nativesdk"
+
+do_install () {
+  install -d ${D}${bindir}
+  install -m 0755 bcm2835-mkimage.py ${D}${bindir}
+  install -m 0644 bcm2835-args-uncompressed.txt ${D}${bindir}
+  install -m 0644 bcm2835-boot-uncompressed.txt ${D}${bindir}
+  install -m 0644 bcm2835-kernel-first32k.bin ${D}${bindir}
+}
+
+FILES_${PN} = " \
+        ${bindir}/bcm2835-* \
+"

recipes-bcm/kernel-image/bcm2835-mkimage/LICENCE

@@ -0,0 +1,3 @@
+I believe this is a proprietary binary (the first32k.bin file) provided by Broadcom.
+
+It is distributed with the express permission of the RaspberryPi foundation.

recipes-bcm/kernel-image/bcm2835-mkimage/bcm2835-args-uncompressed.txt

@@ -0,0 +1,12 @@
+; kernel args (place at 0x00000100)
+0x00000005
+0x54410001
+0x00000001
+0x00001000
+0x00000000
+0x00000004
+0x54410002
+0x08000000
+0x00000000
+0x00000000
+0x00000000

recipes-bcm/kernel-image/bcm2835-mkimage/bcm2835-boot-uncompressed.txt

@@ -0,0 +1,17 @@
+; bootloader (place at 0x00000000)
+0xea000006
+0xe1a00000
+0xe1a00000
+0xe1a00000
+0xe1a00000
+0xe1a00000
+0xe1a00000
+0xe1a00000
+
+0xe3a00000
+0xe3a01042
+0xe3811c0c
+0xe59f2000
+0xe59ff000
+0x00000100
+0x00008000

recipes-bcm/kernel-image/bcm2835-mkimage/bcm2835-mkimage.py

@@ -0,0 +1,51 @@
+#!/usr/bin/python
+
+import os
+import re
+import sys
+
+try:
+   raw_kernel = sys.argv[1]
+except:
+   raw_kernel = "./zImage"
+
+try:
+   output_img = sys.argv[2]
+except:
+   output_img = "./kernel.img"
+
+try:
+   supfile_loc = sys.argv[3]
+except:
+   supfile_loc = "./"
+
+re_line = re.compile(r"0x(?P<value>[0-9a-f]{8})")
+
+mem = [0 for i in range(32768)]
+
+def load_to_mem(name, addr):
+   f = open(name)
+
+   for l in f.readlines():
+      m = re_line.match(l)
+
+      if m:
+         value = int(m.group("value"), 16)
+
+         for i in range(4):
+            mem[addr] = int(value >> i * 8 & 0xff)
+            addr += 1
+
+   f.close()
+
+load_to_mem(""+supfile_loc+"bcm2835-boot-uncompressed.txt", 0x00000000)
+load_to_mem(""+supfile_loc+"bcm2835-args-uncompressed.txt", 0x00000100)
+
+f = open(""+supfile_loc+"bcm2835-kernel-first32k.bin", "wb")
+
+for m in mem:
+   f.write(chr(m))
+
+f.close()
+
+os.system("cat "+supfile_loc+"bcm2835-kernel-first32k.bin "+raw_kernel+" > "+output_img+"")