This article will discuss the steps needed to download and compile a Bootable (SD) Linux Image for the ZCU102 using the OSL flow.
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kernel:
$(MAKE) -C linux-xlnx clean
source $(TOOLS)/$(VERSION)/settings64.sh; \
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; \
$(MAKE) -f Makefile modules_install INSTALL_MOD_PATH=. |
Build device-tree
- Create a xsct_script.tcl file with the following contents:
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proc build_dts {args} {
set xsaboard [glob -nocomplain -directory [pwd] -type f *.xsa]
hsi::open_hw_design $xsa
hsi::set_repo_path ./repo
hsi::create_sw_design device-tree -os device_tree -proc psu_cortexa53_0
hsi::generate_target -dir my_dts
hsi::close_hw_design [hsi::current_hw_design]
}0
set version 2020.2
for {set i 0} {$i < [llength $args]} {incr i} {
if {[lindex $args $i] == "-board"} {
set board [string tolower [lindex $args [expr {$i + 1}]]]
}
if {[lindex $args $i] == "-version"} {
set version [string toupper [lindex $args [expr {$i + 1}]]]
}
}
set xsa [glob -nocomplain -directory [pwd] -type f *.xsa]
hsi::open_hw_design $xsa
hsi::set_repo_path ./repo
hsi::create_sw_design device-tree -os device_tree -proc psu_cortexa53_0
hsi::generate_target -dir my_dts
hsi::close_hw_design [hsi::current_hw_design]
if {$board != 0} {
foreach lib [glob -nocomplain -directory repo/my_dtg/device-tree-xlnx/device_tree/data/kernel_dtsi/${version}/include/dt-bindings -type d *] {
if {![file exists my_dts/include/dt-bindings/[file tail $lib]]} {
file copy -force $lib my_dts/include/dt-bindings
}
}
set dtsi_files [glob -nocomplain -directory repo/my_dtg/device-tree-xlnx/device_tree/data/kernel_dtsi/${version}/BOARD -type f *${board}*]
if {[llength $dtsi_files] != 0} {
file copy -force [lindex $dtsi_files end] my_dts
set fileId [open my_dts/system-user.dtsi "w"]
puts $fileId "/include/ \"[file tail [lindex $dtsi_files end]]\""
puts $fileId "/ {"
puts $fileId "};"
close $fileId
}
}
} |
If there is a valid board found, then it will added to dtsi files. Then we can call this from our Makefile:
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build_dts:
$(RM) -r my_dts
$(TOOLS)/$(VERSION)/bin/xsct -eval "source xsct_script.tcl; build_dts -version $(VERSION) -board $(BOARD)" |
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:
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&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,rx-internal-delay = <0x8>;
ti,tx-internal-delay = <0xa>;
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)
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build_dtb:
$(RM) -r system.dtb
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.dts.tmp |
Create SD image
Create the BIF file with the contents below:
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the_ROM_image:
{
[fsbl_config] a53_x64
[bootloader, destination_cpu=a53-0] zynqmp_fsbl/executable.elf
[pmufw_image] zynqmp_pmufw/executable.elf
[destination_device=pl] design_1_wrapper.bit
[destination_cpu=a53-0, load=0x00100000] system.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 command from your Makefile
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