SPL cannot boot FIT image linux kernel in u-boot 2019.07

Mon Feb 19 17:12:24 CET 2024

Dear reader,

For my master thesis in Electrical Engineering I am working on providing OpenWRT support for pynqz2 and adrv9361 boards (armv7 32bit).
OpenWRT uses U-Boot 2019.07.

In the default config file (that I partly had to add stuff/remove stuff myself, see attachment zynq_pynqz2_defconfig), the CONFIG_SPL_OS_BOOT setting is set to yes.
This failed during boot, the boot image is a FIT image.

Booting via load+bootm works (see attachment boot_commands.txt and load_bootm_log.txt).

If I understand it correctly, this is a SIMPLE_FIT?

I have been trying to get the SPL to boot the kernel for a few days now.
It seems to be stuck on the gunzip function (see attachment SPL_log.txt)

Does anybody has a clue to what is going on here?
Documentation and more about SPL booting kernel and FIT images are always welcome.

Kind regards,

Robbe Gaeremynck
Student ma - Electrical Engineering - Electronic Circuits and Systems
-------------- next part --------------
ls mmc 0:1
load mmc 0:1 0x1000000 fit.itb
set bootargs 'console=ttyPS0,115200n8 root=/dev/mmcblk0p2 rootwait earlyprintk'
bootm 0x1000000
-------------- next part --------------
Zynq> load mmc 0:1 0x1000000 fit.itb
reading fit.itb at pos 0, maxsize 0, to memory pos 0x01000000
4947228 bytes read in 283 ms (16.7 MiB/s)
Zynq> bootm 0x1000000
## Loading kernel from FIT Image at 01000000 ...
   Using 'config-1' configuration
   Trying 'kernel-1' kernel subimage
     Description:  ARM OpenWrt Linux-5.15.138
     Type:         Kernel Image
     Compression:  gzip compressed
     Data Start:   0x010000e4
     Data Size:    4936814 Bytes = 4.7 MiB
     Architecture: ARM
     OS:           Linux
     Load Address: 0x00008000
     Entry Point:  0x00008000
     Hash algo:    crc32
     Hash value:   5240d5bb
     Hash algo:    sha1
     Hash value:   4600271e41e01f3194a5372467179e852b06d389
   Verifying Hash Integrity ... crc32+ sha1+ OK
## Loading fdt from FIT Image at 01000000 ...
   Using 'config-1' configuration
   Trying 'fdt-1' fdt subimage
     Description:  ARM OpenWrt tul_zynq-pynq-z2 device tree blob
     Type:         Flat Device Tree
     Compression:  uncompressed
     Data Start:   0x014b5690
     Data Size:    8518 Bytes = 8.3 KiB
     Architecture: ARM
     Hash algo:    crc32
     Hash value:   26dcef04
     Hash algo:    sha1
     Hash value:   4d0eeb6e70f1b87c8df9f2576d05ec77919e431b
   Verifying Hash Integrity ... crc32+ sha1+ OK
   Booting using the fdt blob at 0x14b5690
   Uncompressing Kernel Image ... dst_addr 00008000 | unc_len 62914560 | img_buf 010000e4 | lenp 4936814
OK
   kernel loaded at 0x00008000, end = 0x00c9ab00
   Loading Device Tree to 1eb35000, end 1eb3a145 ... OK
## Transferring control to Linux (at address 00008000)...

-------------- next part --------------
U-Boot SPL 2019.07-OpenWrt-r23634-a39dca7ead (Nov 19 2023 - 13:44:36 +0000)
mmc boot
Trying to boot from MMC1
spl_mmc_load_image start
CONFIG_SPL_FAT_FAT : not starting uboot
reading system.dtb at pos 0, maxsize 0, to memory pos 0x10000000
reading fit.itb at pos 0, maxsize 64, to memory pos 0x03ffffc0
reading fit.itb at pos 0, maxsize 4947228, to memory pos 0x01000000
embedded data
calling gunzip dst_addr: 00008000 | unc_len 62914560 | img_buf 010000e4 | lenp 4936814
dst_addr 00008000 | unc_len 62914560 | img_buf 010000e4 | lenp 4936814
-------------- next part --------------
CONFIG_ARM=y
CONFIG_ARCH_ZYNQ=y
CONFIG_SYS_TEXT_BASE=0x4000000
CONFIG_SPL=y
CONFIG_DEBUG_UART_BASE=0xe0000000
CONFIG_DEBUG_UART_CLOCK=50000000
CONFIG_SPL_STACK_R_ADDR=0x200000
CONFIG_DEBUG_UART=y
CONFIG_DISTRO_DEFAULTS=y

CONFIG_SPL_GZIP=y # Kernel is compressed as gzip, see build process openwrt
CONFIG_DEBUG=y
# DEBUG:Trying to clone rk3328
CONFIG_FIT=y
# CONFIG_FIT_SIGNATURE=y
CONFIG_FIT_VERBOSE=y
# CONFIG_IMAGE_FORMAT_LEGACY=y
CONFIG_SPL_STACK_R=y
CONFIG_SPL_OS_BOOT=y
CONFIG_SPL_LOAD_FIT=y // Single kernel + fdt blob = simple fit image
CONFIG_DEFAULT_FDT_FILE="system.dtb"
# CONFIG_SPL_SPI_LOAD=y
CONFIG_SPL_PAYLOAD="fit.itb"
CONFIG_SYS_LOAD_ADDR=0x1000000
CONFIG_SPL_MMC_BOOT=y

CONFIG_SYS_PROMPT="Zynq> "
CONFIG_CMD_THOR_DOWNLOAD=y
CONFIG_CMD_DFU=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_FPGA_LOADBP=y
CONFIG_CMD_FPGA_LOADFS=y
CONFIG_CMD_FPGA_LOADMK=y
CONFIG_CMD_FPGA_LOADP=y
CONFIG_CMD_GPIO=y
CONFIG_CMD_MMC=y
CONFIG_CMD_SF=y
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_TFTPPUT=y
CONFIG_CMD_CACHE=y
CONFIG_CMD_EXT4_WRITE=y
CONFIG_DEFAULT_DEVICE_TREE="zynq-pynq-z2"
CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_SPL_DM_SEQ_ALIAS=y
CONFIG_DFU_MMC=y
CONFIG_DFU_RAM=y
CONFIG_FPGA_XILINX=y
CONFIG_FPGA_ZYNQPL=y
CONFIG_DM_GPIO=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_ZYNQ=y
CONFIG_SPI_FLASH=y
CONFIG_SPI_FLASH_BAR=y
CONFIG_SPI_FLASH_SPANSION=y
CONFIG_PHY_REALTEK=y
CONFIG_MII=y
CONFIG_ZYNQ_GEM=y
CONFIG_ZYNQ_GEM_SPI_MAC_OFFSET=0x20
CONFIG_DEBUG_UART_ZYNQ=y
CONFIG_ZYNQ_SERIAL=y
CONFIG_ZYNQ_QSPI=y
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_ULPI_VIEWPORT=y
CONFIG_USB_ULPI=y
CONFIG_USB_GADGET=y
CONFIG_USB_GADGET_MANUFACTURER="Xilinx"
CONFIG_USB_GADGET_VENDOR_NUM=0x03fd
CONFIG_USB_GADGET_PRODUCT_NUM=0x0300
CONFIG_CI_UDC=y
CONFIG_USB_GADGET_DOWNLOAD=y
CONFIG_USB_FUNCTION_THOR=y