u-boot 卡在啟動核心

我的目標設置：

SOC: STM32H743 (Cortex m7 single core)
Internal Flash: 2MB
Board: Waveshare CoreH7XXI
On-board DRAM: 8MB, Start_Address: 0xd0000000, Size_in_bytes: 0x7A1200
SDCARD: 1GB

Bootloader: mainline u-boot (only I've modified the device tree and added my board files, almost everything is default)
kernel:     mainline linux (compiled with stm32_defconfig configuration + some tweaks in menuconfig)

我的主機（PC）設置：

OS: Ubuntu 20 LTS on windows10 WSL2
Text Editor: VSCode (Visual Studio Code)
Debug Probe: STLink V2
Debug Software: Openocd + gdb-multiarch integrated in VSCode

---

原始 U-boot 串列控制台：

U-Boot 2020.07-00610-g610e1487c8-dirty (Sep 07 2020 - 22:06:45 +0430)

Model: Waveshare STM32H743i-Coreh7 board
DRAM:  7.6 MiB
MMC:   STM32 SD/MMC: 0
In:    serial@40004400
Out:   serial@40004400
Err:   serial@40004400
Hit SPACE in 3 seconds to stop autoboot.
stm32_sdmmc2_send_cmd: cmd 6 failed, retrying ...
stm32_sdmmc2_send_cmd: cmd 6 failed, retrying ...
stm32_sdmmc2_send_cmd: cmd 6 failed, retrying ...
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
U-Boot > fatload mmc 0:1 ${kernel_addr_r} zImage
1403424 bytes read in 326 ms (4.1 MiB/s)
U-Boot > fatload mmc 0:1 ${fdt_addr_r} stm32h743i-coreh7.dtb
15116 bytes read in 14 ms (1 MiB/s)
U-Boot > setenv bootargs console=ttySTM1,115200n8
U-Boot > bootz ${kernel_addr_r} - ${fdt_addr_r}
Kernel image @ 0xd0008000 [ 0x000000 - 0x156a20 ]
## Flattened Device Tree blob at d0408000
  Booting using the fdt blob at 0xd0408000
  Loading Device Tree to d064f000, end d0655b0b ... OK

Starting kernel ...

即使我使用以下命令製作了一個 uImage，但它還是沒有啟動。

mkimage -A arm -O linux -T kernel -C none -a 0xd0008000 -e 0xd0008000 -n "Linux kernel" -d arch/arm/boot/zImage uImage

u-boot 日誌：

U-Boot > bootm ${kernel_addr_r} - ${fdt_addr_r}
## Booting kernel from Legacy Image at d0008000 ...
  Image Name:   Linux kernel
  Image Type:   ARM Linux Kernel Image (uncompressed)
  Data Size:    1403424 Bytes = 1.3 MiB
  Load Address: d0008000
  Entry Point:  d0008000
  Verifying Checksum ... OK
## Flattened Device Tree blob at d0408000
  Booting using the fdt blob at 0xd0408000
  Loading Kernel Image

U-boot環境：

U-Boot > printenv
arch=arm
baudrate=115200
board=coreh7
board_name=coreh7
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}${boot_syslinux_conf}
boot_prefixes=/ /boot/
boot_script_dhcp=boot.scr.uimg
boot_scripts=boot.scr.uimg boot.scr
boot_syslinux_conf=extlinux/extlinux.conf
boot_targets=mmc0 
bootcmd=run distro_bootcmd
bootcmd_mmc0=devnum=0; run mmc_boot
bootdelay=3
bootfstype=fat
cpu=armv7m
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
fdt_addr_r=0xD0408000
fdtcontroladdr=d06572a0
fdtfile=stm32h743i-coreh7.dtb
kernel_addr_r=0xD0008000
loadaddr=0xD0400000
mmc_boot=if mmc dev ${devnum}; then devtype=mmc; run scan_dev_for_boot_part; fi
pxefile_addr_r=0xD0428000
ramdisk_addr_r=0xD0438000
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done; setenv devplist
scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${boot_syslinux_conf}; then echo Found ${prefix}${boot_syslinux_conf}; run boot_extlinux; echo SCRIPT FAILED: continuing...; fi
scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${script}; then echo Found U-Boot script ${prefix}${script}; run boot_a_script; echo SCRIPT FAILED: continuing...; fi; done
scriptaddr=0xD0418000
soc=stm32h7
stderr=serial@40004400
stdin=serial@40004400
stdout=serial@40004400
vendor=waveshare

Environment size: 1873/8188 bytes

你可以從這裡下載我的核心 .config 文件（預設配置：stm32_defconfig）。

你可以從這裡下載我的 u-boot .config 文件。

你可以從這裡下載我修改過的設備樹。

你可以從這裡下載我的 u-boot 特定修改設備樹。

您沒有將任何內容傳遞bootargs給核心，並且由於您繞過了讓正常 Linux 發行版為您提供的邏輯，因此您需要將一些說明控制台在哪裡的內容傳遞給 Linux，因此它會列印出來消息，以及您的根設備。

引用自：https://unix.stackexchange.com/questions/608299