board: xilinx: Add support for user configurable boot script offset
Currently "script_offset_f" env variable is hardcoded, this variable
specifies from which offset of the flash boot.scr should be read/write.
As flashes are of different sizes having a fixed offset makes it
difficult to load other images into the flash which may overwrite the
boot script or cannot utilize the full memory. This current fix
creates a new config "CONFIG_BOOT_SCRIPT_OFFSET" which holds the
offset address, overwrites the "script_offset_f" variable.
Also removed existing variable with default values, as the default
values are held by CONFIG_BOOT_SCRIPT_OFFSET
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/Kconfig b/board/xilinx/Kconfig
index cb272ea..7833b11 100644
--- a/board/xilinx/Kconfig
+++ b/board/xilinx/Kconfig
@@ -47,3 +47,12 @@
depends on OF_BOARD
help
Offset in the memory where the board configuration DTB is placed.
+
+config BOOT_SCRIPT_OFFSET
+ hex "Boot script offset"
+ depends on ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_VERSAL
+ default 0xFC0000 if ARCH_ZYNQ
+ default 0x3E80000 if ARCH_ZYNQMP
+ default 0x7F80000 if ARCH_VERSAL
+ help
+ Specifies distro boot script offset in NAND/NOR flash.