私は組み込みLinuxの世界に最初の足を踏み出そうとしています。この目的のために、以前のSTM32F746 Discoveryデモボードを検索しました。私の目標は、u-bootでLinuxカーネルをロードし、そのカーネルで実行されていることを確認することです。ファイルシステム（カーネルのinitramfsに接続されている）や特定のサービスはありません。ビルドと構成にはbuildrootを使用します。
進行方法に関するいくつかの断片的な情報だけが見つかりましたが、Linuxカーネルとu-bootの両方がこの特定のボードをサポートしているようです（https://github.com/torvalds/linux/blob/master/arch/arm/boot/dts/stm32f746-disco.dtsそしてhttps://github.com/u-boot/u-boot/blob/master/configs/stm32f746-disco_defconfig）。
U-bootは特に問題なく動作します。ブートローダに入ると、イーサネットを介してカーネルイメージをSDRAMにロードしてブートし続けます。しかし、ubootが制御を通過すると問題が発生します。 「カーネルスタート」を印刷した後は、もはやエコーは発生しません。
U-Boot SPL 2019.07 (Sep 14 2019 - 15:02:13 +0200)
Trying to boot from XIP
U-Boot 2019.07 (Sep 14 2019 - 15:02:13 +0200)
Model: STMicroelectronics STM32F746-DISCO board
DRAM: 8 MiB
set_rate not implemented for clock index 4
set_rate not implemented for clock index 4
set_rate not implemented for clock index 4
Flash: 1 MiB
MMC: sdio1@40012c00: 0
In: serial
Out: serial
Err: serial
usr button is at LOW LEVEL
Net:
Warning: ethernet@40028000 (eth0) using random MAC address - 6a:e4:5f:05:16:15
eth0: ethernet@40028000
Hit SPACE in 3 seconds to stop autoboot.
U-Boot > setenv serverip 192.168.2.1
U-Boot > dhcp
Speed: 100, full duplex
BOOTP broadcast 1
DHCP client bound to address 192.168.2.10 (3 ms)
Using ethernet@40028000 device
TFTP from server 192.168.2.1; our IP address is 192.168.2.10
Filename 'uImage-stm32f7'.
TFTP error: trying to overwrite reserved memory...
U-Boot > tftp 0xC0008000 uImage-stm32f7
Speed: 100, full duplex
Using ethernet@40028000 device
TFTP from server 192.168.2.1; our IP address is 192.168.2.10
Filename 'uImage-stm32f7'.
Load address: 0xc0008000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
###########
2.3 MiB/s
done
Bytes transferred = 1718466 (1a38c2 hex)
U-Boot > bootm
## Booting kernel from Legacy Image at c0008000 ...
Image Name: Linux-4.20.0
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1718402 Bytes = 1.6 MiB
Load Address: c0008000
Entry Point: c0008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
Starting kernel ...
（SDRAMの）uImageアドレスからロードしようとしています。可能なすべての警告信号が見つかるように0xC0008000設定しましたが、earlyprintk役に立ちません。また、そのzImage形式（同じアドレスにロード）を試してみましたが、違いはありませんでした。
何が問題なのでしょうか？私がまだLinuxの設定とローディングに初めて触れていることを考えると、目に見えて間違ったものが欠けていることを願っています。それ以外の場合は、より高度なデバッグ技術を使用する必要があります。
私はLinuxカーネルv4.20とuboot v2019.07を使用しています。ちなみに、これは私のbuildrootファイルとlinux defconfigファイルです（私はubootにすべてのデフォルトオプションを使用します）。
ルートディレクトリの構築：
BR2_HOST_GCC_AT_LEAST_4_5=y
BR2_HOST_GCC_AT_LEAST_4_6=y
BR2_HOST_GCC_AT_LEAST_4_7=y
BR2_HOST_GCC_AT_LEAST_4_8=y
BR2_HOST_GCC_AT_LEAST_4_9=y
BR2_HOST_GCC_AT_LEAST_5=y
BR2_HOST_GCC_AT_LEAST_6=y
BR2_HOST_GCC_AT_LEAST_7=y
BR2_HOST_GCC_AT_LEAST_8=y
BR2_SOFT_FLOAT=y
BR2_arm=y
BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT=y
BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8=y
BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9=y
BR2_ARCH_NEEDS_GCC_AT_LEAST_5=y
BR2_ARCH="arm"
BR2_ENDIAN="LITTLE"
BR2_GCC_TARGET_ABI="aapcs-linux"
BR2_GCC_TARGET_CPU="cortex-m7"
BR2_GCC_TARGET_FLOAT_ABI="soft"
BR2_GCC_TARGET_MODE="thumb"
BR2_READELF_ARCH_NAME="ARM"
BR2_BINFMT_FLAT=y
BR2_BINFMT_FLAT_ONE=y
BR2_ARM_CPU_MAYBE_HAS_FPU=y
BR2_ARM_CPU_MAYBE_HAS_FPV4=y
BR2_ARM_CPU_MAYBE_HAS_FPV5=y
BR2_ARM_CPU_HAS_THUMB2=y
BR2_ARM_CPU_ARMV7M=y
BR2_cortex_m7=y
BR2_ARM_EABI=y
BR2_ARM_SOFT_FLOAT=y
BR2_ARM_INSTRUCTIONS_THUMB2=y
BR2_WGET="wget --passive-ftp -nd -t 3"
BR2_SVN="svn --non-interactive"
BR2_BZR="bzr"
BR2_GIT="git"
BR2_CVS="cvs"
BR2_LOCALFILES="cp"
BR2_SCP="scp"
BR2_HG="hg"
BR2_ZCAT="gzip -d -c"
BR2_BZCAT="bzcat"
BR2_XZCAT="xzcat"
BR2_LZCAT="lzip -d -c"
BR2_TAR_OPTIONS=""
BR2_DEFCONFIG="$(CONFIG_DIR)/defconfig"
BR2_DL_DIR="$(TOPDIR)/dl"
BR2_HOST_DIR="$(BASE_DIR)/host"
BR2_PRIMARY_SITE=""
BR2_BACKUP_SITE="http://sources.buildroot.net"
BR2_KERNEL_MIRROR="https://cdn.kernel.org/pub"
BR2_GNU_MIRROR="http://ftpmirror.gnu.org"
BR2_LUAROCKS_MIRROR="http://rocks.moonscript.org"
BR2_CPAN_MIRROR="http://cpan.metacpan.org"
BR2_JLEVEL=12
BR2_STRIP_strip=y
BR2_STRIP_EXCLUDE_FILES=""
BR2_STRIP_EXCLUDE_DIRS=""
BR2_OPTIMIZE_S=y
BR2_STATIC_LIBS=y
BR2_PACKAGE_OVERRIDE_FILE="$(CONFIG_DIR)/local.mk"
BR2_GLOBAL_PATCH_DIR=""
BR2_COMPILER_PARANOID_UNSAFE_PATH=y
BR2_TOOLCHAIN=y
BR2_TOOLCHAIN_USES_UCLIBC=y
BR2_TOOLCHAIN_BUILDROOT=y
BR2_TOOLCHAIN_BUILDROOT_VENDOR="buildroot"
BR2_TOOLCHAIN_BUILDROOT_UCLIBC=y
BR2_TOOLCHAIN_BUILDROOT_LIBC="uclibc"
BR2_KERNEL_HEADERS_AS_KERNEL=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_20=y
BR2_PACKAGE_LINUX_HEADERS=y
BR2_PACKAGE_UCLIBC=y
BR2_UCLIBC_CONFIG="package/uclibc/uClibc-ng.config"
BR2_UCLIBC_CONFIG_FRAGMENT_FILES=""
BR2_PTHREADS=y
BR2_UCLIBC_INSTALL_UTILS=y
BR2_UCLIBC_TARGET_ARCH="arm"
BR2_PACKAGE_HOST_BINUTILS_SUPPORTS_CFI=y
BR2_BINUTILS_VERSION_2_31_X=y
BR2_BINUTILS_VERSION="2.31.1"
BR2_BINUTILS_EXTRA_CONFIG_OPTIONS=""
BR2_GCC_VERSION_8_X=y
BR2_GCC_VERSION="8.3.0"
BR2_EXTRA_GCC_CONFIG_OPTIONS=""
BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS=y
BR2_TOOLCHAIN_SUPPORTS_VARIADIC_MI_THUNK=y
BR2_TOOLCHAIN_HAS_THREADS=y
BR2_TARGET_OPTIMIZATION=""
BR2_TARGET_LDFLAGS=""
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST="4.20"
BR2_TOOLCHAIN_GCC_AT_LEAST_4_3=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_4=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_5=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_6=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_7=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_8=y
BR2_TOOLCHAIN_GCC_AT_LEAST_4_9=y
BR2_TOOLCHAIN_GCC_AT_LEAST_5=y
BR2_TOOLCHAIN_GCC_AT_LEAST_6=y
BR2_TOOLCHAIN_GCC_AT_LEAST_7=y
BR2_TOOLCHAIN_GCC_AT_LEAST_8=y
BR2_TOOLCHAIN_GCC_AT_LEAST="8"
BR2_TOOLCHAIN_HAS_MNAN_OPTION=y
BR2_TOOLCHAIN_HAS_SYNC_1=y
BR2_TOOLCHAIN_HAS_SYNC_2=y
BR2_TOOLCHAIN_HAS_SYNC_4=y
BR2_TOOLCHAIN_HAS_ATOMIC=y
BR2_ROOTFS_SKELETON_DEFAULT=y
BR2_TARGET_GENERIC_HOSTNAME="goofy"
BR2_TARGET_GENERIC_ISSUE="Welcome to (Maldus) Buildroot"
BR2_TARGET_GENERIC_PASSWD_SHA256=y
BR2_TARGET_GENERIC_PASSWD_METHOD="sha-256"
BR2_INIT_BUSYBOX=y
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS=y
BR2_ROOTFS_DEVICE_TABLE="system/device_table.txt"
BR2_TARGET_ENABLE_ROOT_LOGIN=y
BR2_TARGET_GENERIC_ROOT_PASSWD=""
BR2_SYSTEM_BIN_SH_BUSYBOX=y
BR2_TARGET_GENERIC_GETTY=y
BR2_TARGET_GENERIC_GETTY_PORT="console"
BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP=y
BR2_TARGET_GENERIC_GETTY_BAUDRATE="0"
BR2_TARGET_GENERIC_GETTY_TERM="vt100"
BR2_TARGET_GENERIC_GETTY_OPTIONS=""
BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW=y
BR2_SYSTEM_DHCP=""
BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin"
BR2_ENABLE_LOCALE_PURGE=y
BR2_ENABLE_LOCALE_WHITELIST="C en_US"
BR2_ROOTFS_USERS_TABLES=""
BR2_ROOTFS_OVERLAY=""
BR2_ROOTFS_POST_BUILD_SCRIPT="board/stmicroelectronics/stm32-post-build.sh"
BR2_ROOTFS_POST_FAKEROOT_SCRIPT=""
BR2_ROOTFS_POST_IMAGE_SCRIPT=""
BR2_ROOTFS_POST_SCRIPT_ARGS=""
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.20"
BR2_LINUX_KERNEL_VERSION="4.20"
BR2_LINUX_KERNEL_PATCH=""
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="linux_defconfig"
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=""
BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH=""
BR2_LINUX_KERNEL_APPENDED_UIMAGE=y
BR2_LINUX_KERNEL_GZIP=y
BR2_LINUX_KERNEL_UIMAGE_LOADADDR="0xC0008000"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_APPENDED_DTB=y
BR2_LINUX_KERNEL_INTREE_DTS_NAME="stm32f746-disco"
BR2_LINUX_KERNEL_CUSTOM_DTS_PATH=""
BR2_PACKAGE_BUSYBOX=y
BR2_PACKAGE_BUSYBOX_CONFIG="package/busybox/busybox-minimal.config"
BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES=""
BR2_PACKAGE_SKELETON=y
BR2_PACKAGE_HAS_SKELETON=y
BR2_PACKAGE_PROVIDES_SKELETON="skeleton-init-sysv"
BR2_PACKAGE_SKELETON_INIT_COMMON=y
BR2_PACKAGE_SKELETON_INIT_SYSV=y
BR2_PACKAGE_PULSEAUDIO_HAS_ATOMIC=y
BR2_PACKAGE_GOOGLE_BREAKPAD_ARCH_SUPPORTS=y
BR2_PACKAGE_LTP_TESTSUITE_ARCH_SUPPORTS=y
BR2_PACKAGE_LTRACE_ARCH_SUPPORTS=y
BR2_PACKAGE_OPROFILE_ARCH_SUPPORTS=y
BR2_PACKAGE_TCF_AGENT_ARCH="arm"
BR2_PACKAGE_TCF_AGENT_ARCH_SUPPORTS=y
BR2_PACKAGE_CMAKE_ARCH_SUPPORTS=y
BR2_PACKAGE_PROVIDES_HOST_GETTEXT="host-gettext-tiny"
BR2_PACKAGE_NETSURF_ARCH_SUPPORTS=y
BR2_PACKAGE_QT5_JSCORE_AVAILABLE=y
BR2_PACKAGE_FLASHROM_ARCH_SUPPORTS=y
BR2_PACKAGE_SEDUTIL_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_ERLANG_ARCH_SUPPORTS=y
BR2_PACKAGE_ERLANG_ARCH_SUPPORTS=y
BR2_PACKAGE_GAUCHE_ARCH_SUPPORTS=y
BR2_PACKAGE_JAMVM_ARCH_SUPPORTS=y
BR2_PACKAGE_PROVIDES_HOST_LUAINTERPRETER="host-lua"
BR2_PACKAGE_LUAJIT_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_MONO_ARCH_SUPPORTS=y
BR2_PACKAGE_MONO_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_OPENJDK_BIN_ARCH_SUPPORTS=y
BR2_PACKAGE_OPENJDK_ARCH_SUPPORTS=y
BR2_PACKAGE_FDK_AAC_ARCH_SUPPORTS=y
BR2_PACKAGE_OPENAL_ARCH_SUPPORTS=y
BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING_ARCH_SUPPORTS=y
BR2_PACKAGE_ZLIB_NG_ARCH_SUPPORTS=y
BR2_PACKAGE_PROVIDES_HOST_ZLIB="host-libzlib"
BR2_PACKAGE_BOTAN_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBGPG_ERROR_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBGPG_ERROR_SYSCFG="arm-unknown-linux-gnueabi"
BR2_PACKAGE_PROVIDES_HOST_OPENSSL="host-libopenssl"
BR2_PACKAGE_MONGODB_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBOPENH264_ARCH_SUPPORTS=y
BR2_PACKAGE_CANFESTIVAL_ARCH_SUPPORTS=y
BR2_PACKAGE_CLASSPATH_ARCH_SUPPORTS=y
BR2_PACKAGE_JEMALLOC_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBATOMIC_OPS_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBBSD_ARCH_SUPPORTS=y
BR2_PACKAGE_LIBNSPR_ARCH_SUPPORT=y
BR2_PACKAGE_LIBSECCOMP_ARCH_SUPPORTS=y
BR2_PACKAGE_LLVM_ARCH_SUPPORTS=y
BR2_PACKAGE_LLVM_TARGET_ARCH="ARM"
BR2_PACKAGE_QEMU_ARCH_SUPPORTS_TARGET=y
BR2_PACKAGE_HAPROXY_ARCH_SUPPORTS=y
BR2_PACKAGE_IFUPDOWN_SCRIPTS=y
BR2_PACKAGE_MONGREL2_LIBC_SUPPORTS=y
BR2_PACKAGE_AUDIT_ARCH_SUPPORTS=y
BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS=y
BR2_PACKAGE_INITSCRIPTS=y
BR2_PACKAGE_SYSTEMD_ARCH_SUPPORTS=y
BR2_PACKAGE_SYSTEMD_BOOTCHART_ARCH_SUPPORTS=y
BR2_TARGET_ROOTFS_CPIO=y
BR2_TARGET_ROOTFS_CPIO_NONE=y
BR2_TARGET_ROOTFS_INITRAMFS=y
BR2_TARGET_AFBOOT_STM32=y
BR2_TARGET_UBOOT=y
BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
BR2_TARGET_UBOOT_LATEST_VERSION=y
BR2_TARGET_UBOOT_VERSION="2019.07"
BR2_TARGET_UBOOT_PATCH=""
BR2_TARGET_UBOOT_USE_DEFCONFIG=y
BR2_TARGET_UBOOT_BOARD_DEFCONFIG="stm32f746-disco"
BR2_TARGET_UBOOT_CONFIG_FRAGMENT_FILES=""
BR2_TARGET_UBOOT_FORMAT_BIN=y
BR2_TARGET_UBOOT_FORMAT_DTB_BIN=y
BR2_TARGET_UBOOT_SPL=y
BR2_TARGET_UBOOT_SPL_NAME="spl/u-boot-spl.bin"
BR2_TARGET_UBOOT_CUSTOM_DTS_PATH=""
BR2_TARGET_UBOOT_CUSTOM_MAKEOPTS=""
BR2_PACKAGE_HOST_GO_HOST_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_GO_BOOTSTRAP_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_GOOGLE_BREAKPAD_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_OPENOCD=y
BR2_PACKAGE_HOST_PATCHELF=y
BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_RUSTC_ARCH="arm"
BR2_PACKAGE_HOST_RUSTC_ABI="eabi"
BR2_PACKAGE_PROVIDES_HOST_RUSTC="host-rust-bin"
BR2_PACKAGE_HOST_TI_CGT_PRU_ARCH_SUPPORTS=y
BR2_PACKAGE_HOST_UBOOT_TOOLS=y
BR2_XTENSA_OVERLAY_DIR=""
BR2_XTENSA_CUSTOM_NAME=""
BR2_TARGET_ROOTFS_EXT2_BLOCKS=0
BR2_TARGET_ROOTFS_EXT2_EXTRA_INODES=0
BR2_TARGET_ROOTFS_EXT2_EXTRA_BLOCKS=0
BR2_TARGET_UBOOT_CUSTOM_PATCH_DIR=""
BR2_PACKAGE_TZDATA_ZONELIST=""
BR2_TARGET_UBOOT_CUSTOM_GIT_REPO_URL=""
BR2_TARGET_UBOOT_CUSTOM_GIT_VERSION=""
BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL=""
BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION=""
Linux:
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="${BR_BINARIES_DIR}/rootfs.cpio"
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_EMBEDDED=y
CONFIG_ARCH_STM32=y
CONFIG_CPU_V7M_NUM_IRQ=240
CONFIG_SET_MEM_PARAM=y
CONFIG_DRAM_BASE=0x90000000
CONFIG_FLASH_MEM_BASE=0x08000000
CONFIG_FLASH_SIZE=0x00200000
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_ARM_APPENDED_DTB=y
CONFIG_BINFMT_FLAT=y
CONFIG_BINFMT_SHARED_FLAT=y
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_EEPROM_93CX6=y
CONFIG_KEYBOARD_GPIO=y
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_SERIAL_STM32=y
CONFIG_SERIAL_STM32_CONSOLE=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_STM32F4=y
CONFIG_I2C_STM32F7=y
CONFIG_GPIO_STMPE=y
CONFIG_WATCHDOG=y
CONFIG_MFD_STMPE=y
CONFIG_REGULATOR=y
CONFIG_REGULATOR_FIXED_VOLTAGE=y
CONFIG_MMC=y
CONFIG_MMC_ARMMMCI=y
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
CONFIG_LEDS_GPIO=y
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_STM32=y
CONFIG_DMADEVICES=y
CONFIG_STM32_DMA=y
CONFIG_STM32_DMAMUX=y
CONFIG_STM32_MDMA=y
CONFIG_IIO=y
CONFIG_STM32_ADC_CORE=y
CONFIG_STM32_ADC=y
CONFIG_EXT3_FS=y
CONFIG_NLS=y
CONFIG_CRC_ITU_T=y
CONFIG_CRC7=y
CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_INFO=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_USER=y
CONFIG_DEBUG_LL=y
CONFIG_DEBUG_UNCOMPRESS=y
CONFIG_EARLY_PRINTK=y
ベストアンサー1
カーネルをメモリにロードしてチェックサムを確認できるので、メモリが正しく設定されているようです。
起動中にデバイスツリーをロードしないようで、u-bootbootzコマンドはコンソール引数とコンピュータ番号を使用して実行されると思います。printenv実際の起動プロセスを追跡するには、u-bootを使用してください。
以下は、同様の症状を追跡するために私が使用するリンクです。私の場合、カスタムデバイスツリーファイルがありましたが、compatibleCPU値に誤差があり、Linuxがそのドライバを見つけることができませんでした。