arm64: versal-net: Enable remaking ELF from bin

U-Boot is composing u-boot.bin from u-boot-nodtb.bin with appended
dts/dt.dtb. It means U-Boot doesn't have DTB inside. When REMAKE_ELF is
enabled make will also create u-boot.elf which is recreated from
u-boot.bin. Below is build output for mini configuration how ELF is
recreated.

cat arch/arm/dts/versal-net-mini.dtb > dts/dt.dtb
cat u-boot-nodtb.bin dts/dt.dtb > u-boot-dtb.bin
cp dts/dt.dtb u-boot.dtb
cp u-boot-dtb.bin u-boot.bin
aarch64-linux-gnu-objcopy -I binary -B aarch64 -O elf64-littleaarch64
 u-boot.bin u-boot-elf.o
aarch64-linux-gnu-ld.bfd u-boot-elf.o -o u-boot.elf -EL -T u-boot-elf.lds
 --defsym="_start"=0xBBF00000 -Ttext=0xBBF00000

It is useful to have u-boot.elf present because Xilinx XSDB debugger can
load ELF file and user doesn't need to specify loading address for
u-boot.bin.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/ca550c5c4bf908e757a49a83fdfab0e7100de45e.1674121617.git.michal.simek@amd.com

diff --git a/configs/xilinx_versal_net_mini_defconfig b/configs/xilinx_versal_net_mini_defconfig
index 5bad179..0ff5268 100644 (file)
--- a/configs/xilinx_versal_net_mini_defconfig
+++ b/configs/xilinx_versal_net_mini_defconfig
@@ -20,6 +20,7 @@ CONFIG_SYS_MEMTEST_END=0x00001000
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xBBF10000
 # CONFIG_EXPERT is not set
+CONFIG_REMAKE_ELF=y
 # CONFIG_LEGACY_IMAGE_FORMAT is not set
 # CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
 # CONFIG_AUTOBOOT is not set