Zynq: Build Your Own Petalinux

Prerequisite

sudo apt install gcc git make net-tools libncurses5-dev tftpd zlib1g-dev libssl-dev flex bison libselinux1 gnupg wget diffstat chrpath socat xterm autoconf libtool tar unzip texinfo zlib1g-dev gcc-multilib build-essential libsdl1.2-dev libglib2.0-dev zlib1g:i386 screen pax gzip gawk
 

Install FTP server

sudo apt install tftpd-hpa
service tftpd-hpa restart
Service tftpd-hpa status

Download and Install Petalinux (v2020.2)

Download petalinux installer from official Xilinx web site

chmod +x (installer)

mkdir -p ~/petalinux/2020.2

(installer) -d ~/petalinux/2020.2

Change to Use Bash Shell Script

chsh -s /bin/bash

# Logout and log back in after to observe the sh is changed
 

Environment Check and Setup

source ~/petalinux/2020.2/setting.sh

# Ensure working environment has been set

echo $PETALINUX

Minimum Hardware Requirement

One TTC (Triple Timer Counter)

External Memory Controller with at least 32MB of memory

UART

QSPI / SD Card

System user dts location (connect with additional peripheral?)

my-petalinux/project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi

Create and Build the Project

cd ~

petalinux-create --type project --template zynq --name my-petalinux

cd my-petalinux

# Config from xsa

petalinux-config --get-hw-description=(path-containing-xsa)

# Build the package

petalinux-build

# Generate Boot Image

petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/system_wrapper.bit --u-boot

 

Prepare the SD Card

Use fdisk to assign

• 1st partition as W95 FAT32 (Partition Code: b) primary partition, 2048-50000 = ~24MB
• 2nd partition as EXT4, primary partition
  

sudo fdisk /dev/sd(?)

n = new partition

d = delete partition

t = change partition type (Code)

w = apply changes

a = active partition

mkfs.vfat -F32 vfat /dev/sd(?)1

mkfs.ext4 /dev/sd(?)2

Test U-Boot and Linux Kernel

Copy BOOT.BIN, image.ub and boot.scr into SD card FAT32 partition

Copy rootfs.cpio into EXT4 partition

Make sure the SD jumper is selected

Press reset button, output message will be shown on serial console

U-Boot 2020.01 (Mar 17 2021 - 16:35:57 +0000)                                   
                                                                                
CPU:   Zynq 7z010                                                               
Silicon: v3.1                                                                   
DRAM:  ECC disabled 512 MiB                                                     
Flash: 0 Bytes                                                                  
NAND:  0 MiB                                                                    
MMC:   mmc@e0100000: 0

=====================

Found U-Boot script /boot.scr                                                   
2010 bytes read in 12 ms (163.1 KiB/s)

===================== 

Starting kernel ...                                                             
                                                                                
Booting Linux on physical CPU 0x0                                               
Linux version 5.4.0-xilinx-v2020.2 (oe-user@oe-host) (gcc version 9.2.0 (GCC)) 1
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d                 
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache        
OF: fdt: Machine model: xlnx,zynq-7000                                          
earlycon: cdns0 at MMIO 0xe0000000 (options '115200n8')                         
printk: bootconsole [cdns0] enabled                                             
Memory policy: Data cache writealloc                                            
cma: Reserved 16 MiB at 0x1f000000 

Remarks:

BOOT.BIN:

• fsbl.elf (First stage bootloader)
• u-boot.elf (Second stage bootloader)
• design.bit (FPGA bitstream)

image.ub

• system.dtb
• uImage
• rootfs