Restoring U-Boot on NAND flash (BELK/BXELK)
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Contents
History[edit | edit source]
| Version | Date | BELK version | Notes |
|---|---|---|---|
| 1.0.0 | Jan 2020 | 4.1.0 | First version for BELK 4.1.0 |
Introduction[edit | edit source]
This article describes how to restore U-Boot on SLC NAND flash in case it gets corrupted or it is deleted accidentally.
The example refers to BoraXEVB carrier board. The procedure was tested with the binaries released with BELK 4.1.0.
At the end of the procedure, the default partitioning of the NAND flash will be restored. It is depicted in the following image.
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 automatic boot process of U-Boot in order to access the console.
U-Boot SPL 2017.01-belk-4.1.1 (Jan 08 2020 - 16:46:11) mmc boot Trying to boot from MMC1 reading fpga.bit reading fpga.bit design filename = "bora_LVDS_wrapper;UserID=0XFFFFFFFF;Version=2017.1" part number = "7z020clg400" date = "2020/01/08" time = "16:04:17" bytes in bitstream = 4045564 zynq_align_dma_buffer: Align buffer at 4000071 to 3ffff80(swap 1) reading u-boot.img reading u-boot.img U-Boot 2017.01-belk-4.1.1 (Jan 08 2020 - 16:46:11 +0100), Build: belk-4.1.1 Model: Bora Board: Xilinx Zynq I2C: ready DRAM: ECC disabled 1 GiB Relocating to 3ff14000, new gd at 3ead3ee8, sp at 3ead3ec0 NAND: 1024 MiB MMC: sdhci@e0100000: 0 (SD) reading bora.env In: serial@e0001000 Out: serial@e0001000 Err: serial@e0001000 Model: Bora Board: Xilinx Zynq SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 32 MiB SOM ConfigID CRC mismatch for 0xff0101ff (was 0xffffffff, expected 0xca9a6d16) at block 2 (offset 96): using default SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 32 MiB SOM UniqueID not found, using default SOM ConfigID#: ffffffff SOM UniqueID#: ffffffff:ffffffff ds2431_readmem(): error in chip reset ds2431_readmem(): error in reading buffer ds2431_readmem(): error in chip reset ds2431_readmem(): error in reading buffer CB ConfigID CRC mismatch for 0x00000000 (was 0x00000000, expected 0x2144df1c) at block 3 (offset 96): using default CB ConfigID#: ffffffff CB UniqueID#: 00000000:00000000 Net: ZYNQ GEM: e000b000, phyaddr 7, interface rgmii-id eth0: ethernet@e000b000 Hit ENTER within 3 seconds to stop autoboot Bora>
Download via TFTP the U-Boot SPL and the U-Boot binary images. Then, burn them in NAND flash memory.
Bora> setenv ipaddr 192.168.0.91
Bora> setenv ethaddr 00:50:C2:1E:AF:B3
Bora> setenv serverip 192.168.0.23
Bora> tftpboot ${loadaddr} bora/u-boot/belk-4.1.1_bora_nand_boot.bin
Using ethernet@e000b000 device
TFTP from server 192.168.0.23; our IP address is 192.168.0.91
Filename 'bora/u-boot/belk-4.1.1_bora_nand_boot.bin'.
Load address: 0x2080000
Loading: ##############################
1.2 MiB/s
done
Bytes transferred = 149904 (24990 hex)
Bora> run nand_update_spl
NAND erase.part: device 0 offset 0x0, size 0x40000
Erasing at 0x20000 -- 100% complete.
OK
NAND write: device 0 offset 0x0, size 0x24990
149904 bytes written: OK
Bora> tftpboot ${loadaddr} bora/u-boot/belk-4.1.1_bora_nand_u-boot.img
Using ethernet@e000b000 device
TFTP from server 192.168.0.23; our IP address is 192.168.0.91
Filename 'bora/u-boot/belk-4.1.1_bora_nand_u-boot.img'.
Load address: 0x2080000
Loading: #################################################################
#################################################################
####
1.2 MiB/s
done
Bytes transferred = 682324 (a6954 hex)
Bora> run nand_update
NAND erase.part: device 0 offset 0x40000, size 0xc0000
Erasing at 0xe0000 -- 100% complete.
OK
NAND write: device 0 offset 0x40000, size 0xa6954
682324 bytes written: OK
Bora>
Select the NAND flash as boot device, remove the microSD card, and reset the board. The board should boot off the NAND flash as shown in the following image.
Bora> reset resetting ... U-Boot SPL 2017.01-belk-4.1.1 (Jan 08 2020 - 16:52:16) nand boot Trying to boot from NAND 1024 MiB U-Boot 2017.01-belk-4.1.1 (Jan 08 2020 - 16:52:16 +0100), Build: belk-4.1.1 Model: Bora Board: Xilinx Zynq I2C: ready DRAM: ECC disabled 1 GiB Relocating to 3ff14000, new gd at 3ead3ee8, sp at 3ead3ec0 NAND: 1024 MiB MMC: sdhci@e0100000: 0 (SD) In: serial@e0001000 Out: serial@e0001000 Err: serial@e0001000 Model: Bora Board: Xilinx Zynq SOM ConfigID#: 00000008 SOM UniqueID#: 01234567:89abcdef CB ConfigID CRC mismatch for 0x00000000 (was 0x00000000, expected 0x2144df1c) at block 3 (offset 96): using default CB ConfigID#: ffffffff CB UniqueID#: 00000000:00000000 Net: ZYNQ GEM: e000b000, phyaddr 7, interface rgmii-id eth0: ethernet@e000b000 Hit ENTER within 3 seconds to stop autoboot Bora>
