--- /dev/null
+SoCkit
+
+Intro
+=====
+
+This is the buildroot board support for the Arrow SoCkit Evaluation Board.
+
+A good source of information is :
+http://www.rocketboards.org/foswiki/Documentation/ArrowSoCKitEvaluationBoard
+
+How it works
+============
+
+Boot process :
+--------------
+
+In summary, the bootloader has multiple stages, an hardcoded boot routine is
+loaded from an on-chip ROM.
+
+ - That first stage is scanning the SD card's partition table to find
+ partition having the 0xA2 type.
+ - This partition is expected to contain a boot image on its first 60 Kb,
+ because u-boot is bigger, we must fill it with a preloader (u-boot-spl)
+ which will load the u-boot image.
+ - Then the u-boot image will load the Linux kernel.
+
+A good source of information for the boot process is :
+http://xillybus.com/tutorials/u-boot-image-altera-soc
+
+Note for the SPL :
+The SPL generated by the u-boot from Rocketboards doesn't seems to work,
+therefore we provide a patch for {uboot-PKG}/board/altera/socfpga_cyclone5/*
+based on the files generated with the Altera example design.
+
+For more information about this files please look at :
+http://www.rocketboards.org/foswiki/Documentation/PreloaderUbootCustomization#Common_Source_Code
+
+How to build it
+===============
+
+Configure Buildroot
+-------------------
+
+The altera_sockit_defconfig configuration is a minimal configuration with
+all that is required to bring the SoCkit :
+
+ $ make altera_sockit_defconfig
+
+Build everything
+----------------
+
+Note: you will need to have access to the network, since Buildroot will
+download the packages' sources.
+
+ $ make
+
+Result of the build
+-------------------
+
+After building, you should obtain this tree:
+
+ output/images/
+ ├── rootfs.ext2
+ ├── rootfs.ext3 -> rootfs.ext2
+ ├── rootfs.tar
+ ├── socfpga_cyclone5_sockit.dtb
+ ├── socfpga.dtb
+ ├── u-boot.img
+ ├── u-boot-spl.bin
+ └── uImage
+
+
+Signing the Preloader
+---------------------
+
+*** BEWARE ****
+The u-boot-spl.bin must be signed using the Altera's tool "mkpimage".
+This tool comes as a part of the Altera development environnment (SoC EDS).
+A fork of this tool have been done by Maxime Hadjinlian and can be found here :
+https://github.com/maximeh/mkpimage
+
+Remember that without signing the u-boot-spl.bin, the board will not boot !!!
+
+ $ mkpimage u-boot-spl.bin -o u-boot-spl-signed.bin
+
+Prepare your SDcard
+===================
+
+A good source of information for the partitioning process is :
+http://www.rocketboards.org/foswiki/view/Projects/SoCKitLinaroLinuxDesktop#Partition_the_SD_Card
+
+Create the SDcard partition table
+----------------------------------
+
+Determine the device associated to the SD card :
+
+ $ cat /proc/partitions
+
+let's assume it is /dev/mmcblk0 :
+
+ $ sudo fdisk /dev/mmcblk0
+
+Delete all previous partitions with 'd' then create the new partition table,
+using these options, pressing enter after each one:
+
+ * n p 1 9000000 +20480K t 1 b
+ * n p 2 4096 +4496384K t 83
+ * n p 3 2048 +1024K t 3 a2
+
+Using the 'p' option, the SD card's partition must look like this :
+
+Device Boot Start End Blocks Id System
+/dev/mmcblk0p1 9000000 9041919 20960 b W95 FAT32
+/dev/mmcblk0p2 4096 8996863 4496384 83 Linux
+/dev/mmcblk0p3 2048 4095 1024 a2 Unknown
+
+Then write the partition table using 'w' and exit.
+
+Make partition one a DOS partition :
+
+ $ sudo mkdosfs /dev/mmcblk0p1
+
+Install the binaries to the SDcard
+----------------------------------
+
+Remember your binaries are located in output/images/, go inside that directory :
+
+ $ cd output/images
+
+The partition with type a2 is the partition scan by the first bootloader stage
+in the SoCkit ROM to find the next bootloader stage so we must write the signed
+preloader and the u-boot binaries in that partition :
+
+ $ sudo dd if=u-boot-spl-signed.bin of=/dev/mmcblk0p3 bs=64k seek=0
+ $ sudo dd if=u-boot.img of=/dev/mmcblk0p3 bs=64k seek=4
+
+Copy the Linux kernel and its Device tree :
+
+ $ sudo mkdir /mnt/sdcard
+ $ sudo mount /dev/mmcblk0p1 /mnt/sdcard
+ $ sudo cp socfpga.dtb uImage /mnt/sdcard
+ $ sudo umount /mnt/sdcard
+
+Copy the rootfs :
+
+ $ sudo dd if=rootfs.ext2 of=/dev/mmcblk0p2 bs=64k
+ $ sudo sync
+
+It's Done!
+
+Finish
+======
+
+Eject your SDcard, insert it in your SoCkit, and power it up.
+
+if you want a serial console, you can plug a micro B USB cable on the USB-UART
+port, the serial port config to used is 57600/8-N-1.
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