This article will discuss the steps needed to download and compile a Bootable (SD) Linux Image for the ZCU102 using the OSL flow.

NOTE: If building on an Ubuntu (or derivative machine), ensure that the default shell has been changed from Dash to Bash. Compiling in Dash may result in syntax errors within the Makefile that will prevent the code from compiling.

Build FSBL

git clone https://github.com/Xilinx/embeddedsw
cd embeddedsw
git checkout master-rel-2020.2
cd embeddedsw/lib/sw_apps/zynqmp_fsbl/src
make "BOARD=zcu102-es2" "PROC=a53" "CFLAGS+=-DFSBL_DEBUG_INFO"

Build PMU Firmware

cd embeddedsw/lib/sw_apps/zynqmp_pmufw/src
make

Build ATF

...

I have structured this in a way that users can copy this into their Makefile for ease of use.

Getting Sources:

Code Block

language	c#
title	get_sources

get_sources:
	if [ ! -d "./bootgen" ];then \
		git clone https://github.com/Xilinx/bootgen; \
		$(MAKE) -C bootgen; \
	fi
	if [ ! -d "./linux-xlnx" ];then \
		git clone https://github.com/Xilinx/linux-xlnx; \
		cd linux-xlnx && git checkout xilinx-v$(VERSION); \
	fi
	if [ ! -d "./embeddedsw" ];then \
		git clone https://github.com/Xilinx/embeddedsw; \
		cd embeddedsw && git checkout xilinx-v$(VERSION); \
	fi
	if [ ! -d "./repo" ];then \
		mkdir -p repo/my_dtg; \
		cd repo/my_dtg && git clone https://github.com/Xilinx/device-tree-xlnx; \
		cd device-tree-xlnx && git checkout xilinx-v$(VERSION); \
	fi
	if [ ! -d "./u-boot-xlnx" ];then \
		git clone https://github.com/Xilinx/u-boot-xlnx; \
		cd u-boot-xlnx && git checkout xilinx-v$(VERSION); \
	fi
	if [ ! -d "./arm-trusted-firmware" ];then \
		git clone https://github.com/Xilinx/arm-trusted-firmware; \
		cd arm-trusted-firmware && git checkout xilinx-v$(VERSION); \
	fi
	if [ ! -d "./dtc" ];then \
		git clone https://git.kernel.org/pub/scm/utils/dtc/dtc.git; \
		$(MAKE) -C dtc; \
	fi

Build FSBL

Code Block

language	c#
title	fsbl

$(MAKE) -f  embeddedsw/lib/sw_apps/zynqmp_fsbl/src/Makefile "BOARD=zcu102-es2" "PROC=a53" "CFLAGS+=-DFSBL_DEBUG_INFO"

Build PMU Firmware

Code Block

language	c#
title	pmufw

$(MAKE) -f  embeddedsw/lib/sw_apps/zynqmp_pmufw/src/Makefile

Build ATF

Code Block

language	c#
title	atf

atf:
	$(MAKE) -C arm-trusted-firmware clean
	source $(TOOLS); \
	export CROSS_COMPILE=aarch64-none-elf-; \
	cd arm-trusted-firmware; \
	$(MAKE) -f Makefile DEBUG=0 RESET_TO_BL31=1 PLAT=zynqmp bl31

Note: If users want to debug (ie use the symbols) the ATF in Vitis, then set the DEBUG=1. This will place the ATF in DDR at 0x1000

Build u-boot

...

Code Block

language	c#
title	u-boot

uboot:
	$(MAKE) -C u-boot-xlnx clean
	source $(TOOLS); \
	export CROSS_COMPILE=aarch64-linux-gnu-; \
	export ARCH=aarch64; \
	export CC=aarch64-linux-gnu-

...

gcc; \
	export PATH=$$PATH:$(shell pwd)/dtc; \
	cd u-boot-xlnx; \
	$(MAKE) -f  Makefile xilinx_zynqmp_

...

virt_

...

Note: If users want to debug (ie use the symbols) the u-boot in Vitis, then use the u-boot (renamed u-boot.elf) in the boot image.

Build Linux Image:

git clone https://github.com/Xilinx/linux-xlnx.git
cd linux-xlnx
git checkout xilinx-v2020.1
export CROSS_COMPILE=aarch64-linux-gnu-
export ARCH=arm64
make xilinx_zynqmp_defconfig
make

Build device-tree

...

defconfig; \
	$(MAKE) -f  Makefile all -j 32

Note: If users want to debug (ie use the symbols) the u-boot in Vitis, then use the u-boot (renamed u-boot.elf) in the boot image.

Build Linux Image:

Code Block

language	c#
title	kernel

kernel:
	$(MAKE) -C linux-xlnx clean
	source $(TOOLS); \
	export CROSS_COMPILE=aarch64-linux-gnu-; \
	export ARCH=arm64; \
	export CC=aarch64-linux-gnu-gcc; \
	cd linux-xlnx; \
	$(MAKE) -f Makefile xilinx_zynqmp_defconfig; \
	$(MAKE) -f Makefile all -j 32

Build device-tree

Create a xsct_script.tcl file with the following contents:

Code Block

theme	Midnight

proc gen_dtb {hdf} { build_dts {} {
	set xsa [glob -nocomplain -directory [pwd] -type f *.xsa]
   	hsi::open_hw_design $hdf$xsa
   	hsi::set_repo_path ./repo
   	hsi::create_sw_design device-tree -os device_tree -proc psu_cortexa53_0
   generate_target -dir my_dts
}

...

proc psu_cortexa53_0
  	hsi::generate_target -dir my_dts
	hsi::close_hw_design [hsi::current_hw_design]
}

Then we can call this from our Makefile:

Code Block

language	c#
title	dts

build_dts:
	$(RM) -r my_dts
	$(XSCT) -eval "source xsct_script.tcl; build_dts"

Users can make changes to their DeviceTree in my_dts/system-top.dts. For example, since I am using the ZCU102. I will add the PHY.
Do do this, open my_dts/system-top.dts and update the gem3 node, by appending the content below:

Code Block

theme	Midnight

&gem3 {
             status = "okay";
             local-mac-address = [00 0a 35 00 02 90];
             phy-mode = "rgmii-id";
             phy-handle = <&phy0>;
             phy0: phy@c {
                         reg = <0xc>;
                         ti,rxrx-internal-delay = <0x8>;
                         ti,tx-internal-delay = <0x8><0xa>;
                         ti,txfifo-internal-delaydepth = <0xa><0x1>;
             };
};

Users can also add the dtsi here to my_dts directory, and include this into the DT structure. For a quick guide on Devicetree debugging, see the wiki here

Compile the devicetree (DTB)

Code Block

language	c#
title	dtb

build_dtb:
	$(RM) -r system.dtb
              ti,fifo-depth = <0x1>;
             };
};

Users can also add the dtsi here to my_dts directory, and include this into the DT structure. For a quick guide on Devicetree debugging, see the wiki here

Compile the devicetree (DTB)

dtc -I dts -O dtb -o my_dts/system-top.dtb my_dts/system-top.dts

Note: For the 2018.3 release version onward, the 'include' syntax in device-tree files changed from /include/ to the 'C' style #include. Depending on which version of the device-tree-compiler (dtc) is being used, this may cause parsing errors when the .dts file is read. To fix this, all instances of #include need to be replaced with /include/.

Note: To verify, users can use the command below and investigate if the gem3 node was updated:
dtc -I dtb -O dts -o my_dts/system-dump.dts

	export PATH=$$PATH:$(shell pwd)/dtc; \
	gcc -I my_dts -E -nostdinc -undef -D__DTS__ -x assembler-with-cpp -o my_dts/system-top.dts.tmp my_dts/system-top.dts; \
	dtc -I dts -O dtb -o system.dtb my_dts/system-top.

dtb

Create SD image

Build The bootgen binary

git clone https://github.com/Xilinx/bootgen

cd bootgen

make

export PATH=$PATH:/<Your Path>/bootgen

dts.tmp

Create SD image

Create the BIF file with the contents below:

Code Block

theme	Midnight

the_ROM_image:
{
	[fsbl_config] a53_x64
	[bootloader, destination_cpu=a53-0] embedded/lib/sw_apps/zynqmp_fsbl/src/fsbl.elf
	[pmufw_image] embeddedsw/lib/sw_apps/zynqmp_pmufw/src/executable.elf
	[destination_device=pl] design_1_wrapper.bit
	[destination_cpu=a53-0, load=0x00100000] my_dts/system-top.dtb
	[destination_cpu=a53-0,exception_level=el-3,trustzone] arm-trusted-firmware/build/zynqmp/release/bl31/bl31.elf
	[destination_cpu=a53-0,exception_level=el-2] u-boot-xlnx/u-boot.elf
}

Then in bootgen run the command below from XSCT
bootgen -arch zynqmp -image bootgen.bif -o i BOOT.BIN -w onfrom your Makefile

Code Block

language	c#
title	bootgen

bootimage:
	export PATH=$$PATH:$(shell pwd)/bootgen; \
	bootgen -arch zynqMP -image bootgen.bif -w -o BOOT.BIN

Creating the FIT image:

Code Block

theme	Midnight

/dts-v1/;
/ {
          description = "U-Boot fitImage for plnx_aarch64 kernel";
          #address-cells = <1>;
          images {
                       kernel@0 {
                                   description = "Linux Kernel";
                                   data = /incbin/("./linux-xlnx/arch/arm64/boot/Image");
                                   type = "kernel";
                                   arch = "arm64";
                                   os = "linux";
                                   compression = "none";
                                   load = <0x80000>;
                                   entry = <0x80000>;
                                   hash@1 {
                                          algo = "sha1";
                                    };
                       };
                       fdt@0 {
                                  description = "Flattened Device Tree blob";
                                  data = /incbin/("./my_dts/system.dtb");
                                  type = "flat_dt";
                                  arch = "arm64";
                                  compression = "none";
                                  hash@1 {
                                         algo = "sha1";
                                  };
                      };
                      ramdisk@0 {
                                   description = "ramdisk";
                                   data = /incbin/("./petalinux-user-image-plnx_aarch64.cpio.gz");
                                   type = "ramdisk";
                                   arch = "arm64";
                                   os = "linux";
                                   compression = "none";
                                   hash@1 {
                                          algo = "sha1";
                                   };
                      };
};
      configurations {
             default = "conf@1";
             conf@1 {
                          description = "Boot Linux kernel with FDT blob + ramdisk";
                          kernel = "kernel@0";
                          fdt = "fdt@0";
                          ramdisk = "ramdisk@0";
                          hash@1 {
                                algo = "sha1";
                          };
               };
               conf@2 {
                           description = "Boot Linux kernel with FDT blob";
                           kernel = "kernel@0";
                           fdt = "fdt@0";
                           hash@1 {
                                 algo = "sha1";
                           };
               };
       };
};

Use the command below to created the ITB file:command below to created the .ub file:

Code Block

language	c#
title	fit

fit_image:
	export PATH=$$PATH:$(shell pwd)/dtc; \
	../u-boot-xlnx/tools/mkimage -f fitimage.its image.ub

u-boot-xlnx/tools/mkimage -f fitimage.its fitimageimage.itbub

Load the BOOT.BIN and the fitImage.itb image.ub and boot.scr on the SD card and boot. Stop at uboot, and

fatload mmc 0 0x10000000 fitimage
bootm 0x10000000

Users, can also update add the boot.scr to the SD Card from here:2020.1 Release

Versions Compared

Old Version 16

New Version 17

Key

Build FSBL

Build PMU Firmware

Build ATF

Getting Sources:

Build FSBL

Build PMU Firmware

Build ATF

Build u-boot

Build Linux Image:

Build device-tree

Build Linux Image:

Build device-tree

Compile the devicetree (DTB)

Compile the devicetree (DTB)

Create SD image

Build The bootgen binary

Create SD image

Creating the FIT image:

Page Comparison

Versions Compared

Old Version 16

New Version 17

Key

Build FSBL

Build PMU Firmware

Build ATF

Getting Sources:

Build FSBL

Build PMU Firmware

Build ATF

Build u-boot

Build Linux Image:

Build device-tree

Build Linux Image:

Build device-tree

Compile the devicetree (DTB)

Compile the devicetree (DTB)

Create SD image

Build The bootgen binary

Create SD image

Creating the FIT image: