Topic: Boot partition
Hi!
I would like to understand a bit how is structured the boot partition of my C1. I found this information in the OE recipe:
1. dd if=../bootstream-chumby.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=0 count=64
2. dd if=${S}/output/config_block.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=96 count=32
3. dd if=${S}/output/chumby_boot.rom of=${DEPLOY_DIR_IMAGE}/boot.bin seek=128 count=420
4. dd if=${S}/images/4_1.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=548 count=300
5. dd if=${S}/images/4_2.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=848 count=300
6. dd if=${S}/images/5_1.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=1148 count=300
7. dd if=${S}/images/5_2.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=1448 count=300
8. dd if=${S}/images/5_3.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=1748 count=300
9. dd if=${DEPLOY_DIR_IMAGE}/zImage-${MACHINE}.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=2048 count=8192
10. dd if=${DEPLOY_DIR_IMAGE}/zImage-${MACHINE}.bin of=${DEPLOY_DIR_IMAGE}/boot.bin seek=10240 count=8192So, what I understand so far is:
bootstream-chumby.bin (1) is the bootstream created with freescale bootlets and the chumby stub.
chumby_boot.rom (3) do some stuff as described in the wiki and end by loading linux kernel image.
zImage (9 and 10) are the linux kernel images, normal and fallback.
Now my question :-)
What is this config_block.bin ? I can see it is generated with config_util (described as an utility for manipulating config area on eSD-boot platforms), but what is his role during the boot process ?
What are these binaries 4_1.bin, 4_2.bin, 5_1.bin ... They are included in the bootstream-1.0.tgz but didn't find any info about them.
Thanks!