warp7: hab: Set environment variable indicating IVT offset

This patch introduces the environment variable ivt_offset. When we define a
load address for Linux or DTB or any file the IVT associated with that file
is prepended. We extract the actual load addresses from u-boot.cfg and feed
these values into the code-signing process - hence we want u-boot to have
the real load addresses exported in uboot.cfg.

ivt_offset represents the addition or subtraction from the load address
that must happen to find an IVT header.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

diff --git a/include/configs/warp7.h b/include/configs/warp7.h
index 454bc1c..fe9b7d5 100644 (file)
--- a/include/configs/warp7.h
+++ b/include/configs/warp7.h
@@ -10,6 +10,7 @@
 #define __WARP7_CONFIG_H
 
 #include "mx7_common.h"
+#include <imximage.h>
 
 #define PHYS_SDRAM_SIZE                        SZ_512M
 
@@ -50,6 +51,7 @@
        "finduuid=part uuid mmc 0:${rootpart} uuid\0" \
        "mmcargs=setenv bootargs console=${console},${baudrate} " \
                "root=PARTUUID=${uuid} rootwait rw\0" \
+       "ivt_offset=" __stringify(BOOTROM_IVT_HDR_OFFSET)"\0"\
        "warp7_auth_or_fail=hab_auth_img_or_fail ${hab_ivt_addr} ${filesize} 0;\0" \
        "loadbootscript=" \
                "load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \