Merge from bittboy/buildroot@db180c0

board/arm/juno/readme.txt

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+ARM Juno r1/r0
+
+Intro
+=====
+
+These instructions apply to all models of the ARM Juno:
+  - Juno r0 (does not support PCIe)
+  - Juno r1 (supports PCIe)
+  - Juno r2 (Big Cluster with A72)
+
+Buildroot will generate the kernel image, device tree blob, bootloader binaries
+and a minimal root filesystem.
+
+How to build it
+===============
+
+Configure Buildroot
+-------------------
+
+Configuring Buildroot is pretty simple, just execute:
+
+  $ make arm_juno_defconfig
+
+Build the rootfs, kernel and DTB
+--------------------------------
+
+Note: you will need to have access to the network, since Buildroot will
+download the packages' sources.
+
+You may now build your rootfs with:
+
+  $ make
+
+(This may take a while)
+
+Result of the build
+-------------------
+
+After building, you should obtain this tree:
+
+    output/images/
+    +-- rootfs.tar
+    +-- juno.dtb (if Juno r0 is used)
+    +-- juno-r1.dtb (if Juno r1 is used)
+    +-- juno-r2.dtb (if Juno r2 is used)
+    +-- Image
+    +-- bl1.bin
+    +-- bl2.bin
+    +-- bl2u.bin
+    +-- bl31.bin
+    +-- fip.bin
+    +-- scp-fw.bin
+    +-- u-boot.bin
+
+Preparing your rootfs
+======================
+
+Format your pen drive as a ext3 filesystem by executing:
+
+   $ mkfs.ext3 /dev/<your device>
+
+Preparing your rootfs
+======================
+
+Format your pen drive as a ext3 filesystem by executing:
+
+   $ mkfs.ext3 /dev/<your device>
+
+Installing your rootfs
+======================
+
+After mounting the pen drive please execute the following:
+
+   $ sudo tar -xvf output/images/rootfs.tar -C <pen drive mount path>
+
+When completed make sure to unmount the device:
+
+   $ umount <pen drive mount path>
+
+Insert the pen drive in one of the ARM Juno' USB type A connectors.
+
+Configure *.dtb in the boot configuration for Juno r0
+=====================================================
+
+SITE1/HBI0262B/images.txt
+.....
+NOR3UPDATE: AUTO                 ;Image Update:NONE/AUTO/FORCE
+NOR3ADDRESS: 0x00C00000          ;Image Flash Address
+NOR3FILE: \SOFTWARE\juno.dtb     ;Image File Name
+NOR3NAME: board.dtb              ;Specify Image name to preserve file extension
+NOR3LOAD: 00000000               ;Image Load Address
+NOR3ENTRY: 00000000              ;Image Entry Point
+......
+
+Configure *.dtb in the boot configuration for Juno r1
+=====================================================
+
+SITE1/HBI0262C/images.txt
+......
+NOR3UPDATE: AUTO                 ;Image Update:NONE/AUTO/FORCE
+NOR3ADDRESS: 0x00C00000          ;Image Flash Address
+NOR3FILE: \SOFTWARE\juno-r1.dtb  ;Image File Name
+NOR3NAME: board.dtb              ;Specify target filename to preserve file extension
+NOR3LOAD: 00000000               ;Image Load Address
+NOR3ENTRY: 00000000              ;Image Entry Point
+......
+
+Configure *.dtb in the boot configuration for Juno r2
+=====================================================
+
+SITE1/HBI0262D/images.txt
+......
+NOR3UPDATE: AUTO                 ;Image Update:NONE/AUTO/FORCE
+NOR3ADDRESS: 0x02000000          ;Image Flash Address
+NOR3FILE: \SOFTWARE\juno-r2.dtb  ;Image File Name
+NOR3NAME: board.dtb              ;Specify target filename to preserve file extension
+NOR3LOAD: 00000000               ;Image Load Address
+NOR3ENTRY: 00000000              ;Image Entry Point
+......
+
+Installing kernel image and DTB
+===============================
+
+1. Connect to the ARM Juno UART0 and execute USB_ON in the terminal
+2. Connect a USB cable between your PC and ARM Juno USB type B connector
+   A mass storage device should appear in your desktop.
+3. Open the software/ folder
+4. Copy the 'Image' file to software/
+5. Copy the 'juno-r1.dtb' (r1), 'juno.dtb' (r0) or juno-r2.dtb (r2) file to software/
+6. Copy the bootloader binaries (bl1.bin and fip.bin) to software/
+7. Press the red button in the front pannel of ARM Juno
+
+At this time, the board will erase the Flash entry for each new item and
+replace it with the lastest ones.