arm-autonomy/u-boot: Modified kernel_addr for fvp-base with xen

Modified the default booti command for fvp-base with xen to boot
into xen at 0x84000000, rather than requiring the user to break
into the u-boot prompt.

Issue-Id: SCM-2195
Signed-off-by: Nathan Dunne <Nathan.Dunne@arm.com>
Change-Id: I91f324ce77716474596a78f97e74f432969d9803
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/documentation/arm-autonomy-quickstart.md

@@ -115,6 +115,10 @@ To boot the system using an u-boot base board you will need to:
 
 In this example the addresses might need to be adapted depending on your board.
 
+For arm-autonomy host on FVP-Base u-boot has been modified such that
+`booti 0x84000000 - 0x83000000` is the default boot command. If FVP-Base is your
+MACHINE target there should be no need to interfere with u-boot.
+
 Guest project
 -------------
 The guest projects are not target specific and will use a Yocto MACHINE defined

meta-arm-autonomy/recipes-bsp/u-boot/u-boot-2020.01/fvp-base/xen_u-boot_kernel_addr.patch

@@ -0,0 +1,16 @@
+Upstream Status: Inappropriate [meta-arm-autonomy specifc u-boot config]
+Signed-off-by: Nathan Dunne <nathan.dunne@arm.com>
+
+diff --git a/include/configs/vexpress_aemv8a.h b/include/configs/vexpress_aemv8a.h
+index e63c335f85..9ee050a4a6 100644
+--- a/include/configs/vexpress_aemv8a.h
++++ b/include/configs/vexpress_aemv8a.h
+@@ -162,7 +162,7 @@
+ #elif CONFIG_TARGET_VEXPRESS64_BASE_FVP
+ #define CONFIG_EXTRA_ENV_SETTINGS	\
+ 				"kernel_name=Image\0"		\
+-				"kernel_addr=0x80080000\0"	\
++				"kernel_addr=0x84000000\0"	\
+ 				"initrd_name=ramdisk.img\0"	\
+ 				"initrd_addr=0x88000000\0"	\
+ 				"fdtfile=devtree.dtb\0"		\

meta-arm-autonomy/recipes-bsp/u-boot/u-boot_2020.01.bbappend

@@ -0,0 +1,9 @@
+# Machine specific u-boot
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/${BP}:"
+
+#
+# FVP BASE
+#
+
+SRC_URI_append_fvp-base = "${@bb.utils.contains('DISTRO_FEATURES', 'arm-autonomy-host', ' file://xen_u-boot_kernel_addr.patch', '', d)}"