DESK-XZ7-L/Deployment/Restoring U-Boot on NOR flash

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History
Issue Date Notes
2022/11/22 DESK-XZ7-L-1.0.0-rc1 release
2024/01/22 DESK-XZ7-L-1.0.1 release


Restoring U-Boot on SPI NOR flash[edit | edit source]

This article describes how to restore U-Boot on SPI NOR flash in case it gets corrupted or it is deleted accidentally.

Instructions[edit | edit source]

First of all, create a bootable microSD card as described here.

Then, boot the board with the microSD card and stop the automatic boot process of U-Boot in order to access the console. 

U-Boot 2021.01-desk-xz7-l-1.0.1 (Jan 12 2024 - 10:44:15 +0000)

CPU:   Zynq 7z030
Silicon: v3.1
Model: Bora
DRAM:  ECC disabled 1 GiB
Flash: 0 Bytes
NAND:  0 MiB
MMC:   mmc@e0100000: 0
Loading Environment from FAT... *** Warning - bad CRC, using default environment

In:    serial@e0001000
Out:   serial@e0001000
Err:   serial@e0001000
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
SOM ConfigID#: 00000004
SOM UniqueID#: 2a0e92c4:03193a4b
CB ConfigID#: ffffffff
CB UniqueID#: ffffffff:ffffffff
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
Warning: MAC addr not found in SPI NOR at block 8
Net:
ZYNQ GEM: e000b000, mdio bus e000b000, phyaddr 7, interface rgmii-id

Warning: ethernet@e000b000 (eth0) using random MAC address - 72:2c:e1:44:08:28
eth0: ethernet@e000b000
Hit ENTER within 2 seconds to stop autoboot
Zynq>

Programming SPI NOR flash from uSD[edit | edit source]

  • Initialize and format QSPINOR memory
Zynq> sf probe
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
Zynq> sf erase 0 0x1000000
SF: 16777216 bytes @ 0x0 Erased: OK
  • Install BOOT.BIN on QSPINOR memory
Zynq> fatload mmc 0:1 $kernel_addr_r BOOT.BIN
7033004 bytes read in 406 ms (16.5 MiB/s)
Zynq> sf write $kernel_addr_r 0x0 $filesize
device 0 offset 0x0, size 0x6b50ac
SF: 7033004 bytes @ 0x0 Written: OK
  • Install image.ub on QSPINOR memory
Zynq> mw $kernel_addr_r 0x0 $filesize
Zynq> fatload mmc 0:1 $kernel_addr_r image.ub
4868556 bytes read in 287 ms (16.2 MiB/s)
Zynq> sf write $kernel_addr_r 0x700000 $filesize
device 0 offset 0x700000, size 0x4a49cc
SF: 4868556 bytes @ 0x700000 Written: OK
  • Install boot.scr on QSPINOR memory
Zynq> mw $kernel_addr_r 0x0 $filesize
Zynq> fatload mmc 0:1 $kernel_addr_r boot.scr
2709 bytes read in 14 ms (188.5 KiB/s)
Zynq> sf write $kernel_addr_r 0xFC0000 $filesize
device 0 offset 0xfc0000, size 0xa95
SF: 2709 bytes @ 0xfc0000 Written: OK

Programming SPI NOR flash from ethernet[edit | edit source]

  • Initialize and format QSPINOR memory
Zynq> sf probe
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
Zynq> sf erase 0 0x1000000
SF: 16777216 bytes @ 0x0 Erased: OK
  • Properly define the ethernet configuration parameter:
Zynq> setenv ipaddr 192.168.0.89
Zynq> setenv serverip 192.168.0.99
  • download via TFTP the BOOT.BIN binary image and write BOOT.BIN on QSPINOR memory
Zynq> tftpboot $kernel_addr_r desk-xz7-l/desk-xz7-l-1.0.1_borax_BOOT.BIN
Using ethernet@e000b000 device
TFTP from server 192.168.0.99; our IP address is 192.168.0.89
Filename 'desk-xz7-l/desk-xz7-l-1.0.1_borax_BOOT.BIN'.
Load address: 0x2000000
Loading: #T ################################################################
         #################################################################
         ...
         #################################################################
         #########
         444.3 KiB/s
done
Bytes transferred = 7033004 (6b50ac hex)
Zynq> sf write $kernel_addr_r 0x0 $filesize
device 0 offset 0x0, size 0x6b50ac
SF: 7033004 bytes @ 0x0 Written: OK
  • download via TFTP the image.ub binary image and write image.ub on QSPINOR memory
Zynq> mw $kernel_addr_r 0x0 $filesize
Zynq> tftpboot $kernel_addr_r desk-xz7-l/desk-xz7-l-1.0.1_borax_image.ub
Using ethernet@e000b000 device
TFTP from server 192.168.0.99; our IP address is 192.168.0.89
Filename 'desk-xz7-l/desk-xz7-l-1.0.1_borax_image.ub'.
Load address: 0x2000000
Loading: #T ################################################################
         #################################################################
         ...
         #################################################################
         #########################################
         394.5 KiB/s
done
Bytes transferred = 4868556 (4a49cc hex)
Zynq> sf write $kernel_addr_r 0x700000 $filesize
device 0 offset 0x700000, size 0x4a49cc
SF: 4868556 bytes @ 0x700000 Written: OK
  • download via TFTP the boot.scr binary image and write boot.scr on QSPINOR memory
Zynq> mw $kernel_addr_r 0x0 $filesize
Zynq> tftpboot $kernel_addr_r desk-xz7-l/desk-xz7-l-1.0.1_borax_boot.scr
Using ethernet@e000b000 device
TFTP from server 192.168.0.99; our IP address is 192.168.0.89
Filename 'desk-xz7-l/desk-xz7-l-1.0.1_borax_boot.scr'.
Load address: 0x2000000
Loading: #T
         0 Bytes/s
done
Bytes transferred = 2709 (a95 hex)
Zynq> sf write $kernel_addr_r 0xFC0000 $filesize
device 0 offset 0xfc0000, size 0xa95
SF: 2709 bytes @ 0xfc0000 Written: OK

Select the SPI NOR flash as boot device, install a rootfs into second partition of microSD card, and reset the board. The board should boot off the NOR flash as shown in the following log.



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