[U-Boot] [PATCH] i.mx6q: configs: Add fdt_high and initrd_high variables

[Dirk Behme]

To be able to load the device tree and initrd correctly, set
the fdt_high and initrd_high environment variables.

Using 0xffffffff implies that the device tree and the initrd
are initially copied to working addresses. This will avoid an
additional copy.

Loading the device tree to 0x30000000 and the initrd to 0x3c000000
should work for both boards, the ARM2 and SabreLite.

Example (SabreLite):

fatload mmc 0:2 0x10000000 uImage
fatload mmc 0:2 0x3c000000 uInitrd
fatload mmc 0:2 0x30000000 board.dtb
bootm 0x10000000 0x3c000000 0x30000000

Note: This requires that the kernel has CONFIG_HIGHMEM enabled.

Signed-off-by: Dirk Behme <dirk.behme at de.bosch.com>
CC: Jason Liu <jason.hui at linaro.org>
CC: Stefano Babic <sbabic at denx.de>
---
Note: This patch is against the recent head of u-boot-imx.git including
      the SabreLite support:

      5b894e4d00ff94a221f8cc23d54d08b889f54190
      i.mx: i.mx6q: add the initial support for i.mx6q Sabre Lite board

Note: tools/checkpatch.pl reports 0 errors, 0 warnings

 include/configs/mx6qarm2.h      |    2 ++
 include/configs/mx6qsabrelite.h |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/configs/mx6qarm2.h b/include/configs/mx6qarm2.h
index 124a7a6..0962d3c 100644
--- a/include/configs/mx6qarm2.h
+++ b/include/configs/mx6qarm2.h
@@ -86,6 +86,8 @@
 	"script=boot.scr\0" \
 	"uimage=uImage\0" \
 	"console=ttymxc3\0" \
+	"fdt_high=0xffffffff\0" \
+	"initrd_high=0xffffffff\0" \
 	"mmcdev=1\0" \
 	"mmcpart=2\0" \
 	"mmcroot=/dev/mmcblk0p3 rootwait rw\0" \
diff --git a/include/configs/mx6qsabrelite.h b/include/configs/mx6qsabrelite.h
index 464f0ec..ba09f15 100644
--- a/include/configs/mx6qsabrelite.h
+++ b/include/configs/mx6qsabrelite.h
@@ -78,6 +78,8 @@
        "script=boot.scr\0" \
        "uimage=uImage\0" \
        "console=ttymxc3\0" \
+	"fdt_high=0xffffffff\0"	  \
+	"initrd_high=0xffffffff\0" \
        "mmcdev=0\0" \
        "mmcpart=2\0" \
        "mmcroot=/dev/mmcblk0p3 rootwait rw\0" \
-- 
1.7.0.4