[U-Boot] [PATCH v4 08/10] vexpress64: juno: add optional initrd

[Ryan Harkin <ryan.harkin@linaro.org>]

Some OS images require an initrd on Juno.

If the file ramdisk.img exists in NOR flash, then we load it and pass
the address to the kernel.  Otherwise, we pass the "-" parameter as
before.

Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 include/configs/vexpress_aemv8a.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/configs/vexpress_aemv8a.h b/include/configs/vexpress_aemv8a.h
index f9fa2ce..99dd8b6 100644
--- a/include/configs/vexpress_aemv8a.h
+++ b/include/configs/vexpress_aemv8a.h
@@ -189,6 +189,8 @@
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 				"kernel_name=Image\0"	\
 				"kernel_addr=0x80000000\0" \
+				"initrd_name=ramdisk.img\0"	\
+				"initrd_addr=0x84000000\0"	\
 				"fdt_name=juno\0" \
 				"fdt_addr=0x83000000\0" \
 				"fdt_high=0xffffffffffffffff\0" \
@@ -207,7 +209,12 @@
 #define CONFIG_BOOTCOMMAND	"afs load ${kernel_name} ${kernel_addr} ; " \
 				"afs load  ${fdt_name} ${fdt_addr} ; " \
 				"fdt addr ${fdt_addr}; fdt resize; " \
-				"booti ${kernel_addr} - ${fdt_addr}"
+				"if afs load  ${initrd_name} ${initrd_addr} ; "\
+				"then "\
+				"  setenv initrd_param ${initrd_addr}; "\
+				"  else setenv initrd_param -; "\
+				"fi ; " \
+				"booti ${kernel_addr} ${initrd_param} ${fdt_addr}"
 
 #define CONFIG_BOOTDELAY		1
 
-- 
2.1.0