Boot the 2020.1 FSBL in QEMU

This write-up shows how to boot the 2020.1 FSBL in QEMU. It also shows how to recompile the FSBL from PetaLinux 2020.1.

Install PetaLinux 2020.1

# Download petalinux-v2020.1-final-installer.run to ~/Downloads
# Download xilinx-zcu102-v2020.1-final.bsp to ~/Downloads
mkdir -p ~/plxbsps
mkdir -p ~/plxprjs
mkdir -p ~/petalinux
cd ~/Downloads
./petalinux-v2020.1-final-installer.run -d $HOME/petalinux/2020.1 # Takes a bit

Create, Build the ZCU102 BSP, and Boot U-Boot

mkdir -p ~/plxprjs
cd ~/plxprjs
source ~/petalinux/2020.1/settings.sh
petalinux-create -t project -s ~/Downloads/xilinx-zcu102-v2020.1-final.bsp
cd xilinx-zcu102-2020.1
petalinux-build
# test QEMU
petalinux-boot --qemu --u-boot
... you'll see it pause at (qemu)...then boot U-Boot
# Ctrl-a x to quit

Make the Change Needed for the FSBL to Boot in QEMU

...as listed in [

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/862421130/Known+Issues#KnownIssues-Firststagebootloader(FSBL)hangsonQEMUFSBLHang]

# Get the source and launch the environment

petalinux-build -c fsbl -x compile
petalinux-build -c fsbl -x devshell
# A dev shell should launch placing the user in
# root@ubuntu:~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/git#

find ~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/ -name "xfsbl_initialization.c"

# you'll see 3, choose the one listed here:

grep -REns "XFsbl_DdrInit" ~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/build/fsbl/xfsbl_initialization.c

# You should see: # 753: Status = XFsbl_DdrInit();

# Edit

vi +753 ~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/build/fsbl/xfsbl_initialization.c

# Comment out:

#

# // Status = XFsbl_DdrInit();

# // if (XFSBL_SUCCESS != Status) {

# // XFsbl_Printf(DEBUG_GENERAL,"XFSBL_DDR_INIT_FAILED\n\r");

# // goto END;

# // }

# Run:

~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/temp/run.do_compile

# Note, the exe will be at:

ls -l ~/plxprjs/xilinx-zcu102-2020.1/build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/build/fsbl/executable.elf

Test It

# Open a new terminal (terminal 2)

# Run once

cd ~/plxprjs/xilinx-zcu102-2020.1
 source ~/petalinux/2020.1/settings.sh
PATH=/home/demo/petalinux/2020.1/components/yocto/buildtools/sysroots/x86_64-petalinux-linux/usr/bin/:$PATH

# Then run:

rm -rf /tmp/tmp.test
mkdir /tmp/tmp.test 
# Args broken out 
qemu-system-microblazeel \
-M microblaze-fdt \
-display none \
-kernel ./pre-built/linux/images/pmu_rom_qemu_sha3.elf \
-device loader,file=./images/linux/pmufw.elf \
-hw-dtb ./images/linux/zynqmp-qemu-multiarch-pmu.dtb \
-machine-path /tmp/tmp.test \
-device loader,addr=0xfd1a0074,data=0x1011003,data-len=4 \
-device loader,addr=0xfd1a007C,data=0x1010f03,data-len=4

# Open another new terminal (terminal 3)

# Run once

cd ~/plxprjs/xilinx-zcu102-2020.1
 source ~/petalinux/2020.1/settings.sh
PATH=/home/demo/petalinux/2020.1/components/yocto/buildtools/sysroots/x86_64-petalinux-linux/usr/bin/:$PATH

# Then run:

qemu-system-aarch64 \
-M arm-generic-fdt \
-m 4G \
-nographic \
-monitor none \
 -hw-dtb ./images/linux/zynqmp-qemu-multiarch-arm.dtb \
-device loader,file=./build/tmp/work/zcu102_zynqmp-xilinx-linux/fsbl/2020.1+gitAUTOINC+6cbb920f4d-r0/build/fsbl/executable.elf,cpu-num=0 \
 -device loader,addr=0xfd1a0104,data=0x8000000e,data-len=4 \
 -machine-path /tmp/tmp.test \
 -global xlnx,zynqmp-boot.cpu-num=0 \
 -global xlnx,zynqmp-boot.use-pmufw=true \
 -serial mon:stdio

You should see:

PMU Firmware 2020.1	Aug  8 2021   06:05:27
PMU_ROM Version: xpbr-v8.1.0-0
Xilinx Zynq MP First Stage Boot Loader 
Release 2020.1   Aug  8 2021  -  06:16:42

Type Ctrl-a x to quit in the 3rd open terminal to quit.

You can launch QEMU again by running the command sequence after the "run once" command in terminal 2 and the command sequence after the "run once" command in terminal 3.

References

• The Xilinx graphic is from [link]