i.MX6ULL系统移植：uboot移植1 - 编译官方uboot
NXP官方uboot编译，主要参考《i.MX Porting Guide》文档。按文档中方法进行编译测试。
一、下载NXP 官方uboot
uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
二、将uboot 拷贝到ubuntu
onlylove@ubuntu:~/linux/uboot/nxp_uboot$ ls
uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
onlylove@ubuntu:~/linux/uboot/nxp_uboot$
三、解压uboot
tar -vxjf uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
解压后，文件目录如下
onlylove@ubuntu:~/linux/uboot/nxp_uboot$ ls
uboot-imx-rel_imx_4.1.15_2.1.0_ga uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
onlylove@ubuntu:~/linux/uboot/nxp_uboot$
onlylove@ubuntu:~/linux/uboot/nxp_uboot$ cd uboot-imx-rel_imx_4.1.15_2.1.0_ga/
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ ls
api cmd configs drivers fs Kconfig MAINTAINERS net scripts tools
arch common disk dts include lib MAKEALL post snapshot.commit
board config.mk doc examples Kbuild Licenses Makefile README test
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$
四、NXP 官方编译指令
1、指定交叉编译器
export CROSS_COMPILE=arm-linux-gnueabihf-
2、指定架构
export ARCH=arm
3、清除编译过程文件
make clean
4、配置
make mx6ull_14x14_evk_defconfig
5、编译
make u-boot.imx
6、将引导镜像刻录到SD卡中
dd if=<boot_image> of=/dev/sd<x> bs=1k seek=<offset> conv=fsync
boot_image：
u-boot.imx - for i.MX 6 or i.MX 7
flash.bin - for i.MX8
sd<x>：
Device node for the SD card
offset：
1 - for i.MX 6 or i.MX 7
33 - for i.MX 8QuadMax A0, i.MX 8QuadXPlus A0, i.MX 8M Quad, i.MX 8M Mini
32 - for i.MX 8QuadXPlus B0 and i.MX 8QuadMax B0
五、验证
1、配置编译平台
onlylove@ubuntu:~$ export CROSS_COMPILE=arm-linux-gnueabihf-
onlylove@ubuntu:~$ export ARCH=arm
onlylove@ubuntu:~$
配置前，环境变量值如下：
onlylove@ubuntu:~$ export -p
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DISPLAY="localhost:11.0"
declare -x HOME="/home/onlylove"
declare -x LANG="en_US.UTF-8"
declare -x LESSCLOSE="/usr/bin/lesspipe %s %s"
declare -x LESSOPEN="| /usr/bin/lesspipe %s"
declare -x LOGNAME="onlylove"
declare -x LS_COLORS="rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:"
declare -x MOTD_SHOWN="pam"
declare -x OLDPWD
declare -x PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin"
declare -x PWD="/home/onlylove"
declare -x SHELL="/bin/bash"
declare -x SHLVL="1"
declare -x SSH_CLIENT="192.168.6.1 9592 22"
declare -x SSH_CONNECTION="192.168.6.1 9592 192.168.6.128 22"
declare -x SSH_TTY="/dev/pts/1"
declare -x TERM="xterm"
declare -x USER="onlylove"
declare -x XDG_DATA_DIRS="/usr/local/share:/usr/share:/var/lib/snapd/desktop"
declare -x XDG_RUNTIME_DIR="/run/user/1000"
declare -x XDG_SESSION_CLASS="user"
declare -x XDG_SESSION_ID="5"
declare -x XDG_SESSION_TYPE="tty"
onlylove@ubuntu:~$
配置后，环境变量如下：
onlylove@ubuntu:~$ export -p
declare -x ARCH="arm"
declare -x CROSS_COMPILE="arm-linux-gnueabihf-"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DISPLAY="localhost:12.0"
declare -x HOME="/home/onlylove"
declare -x LANG="en_US.UTF-8"
declare -x LESSCLOSE="/usr/bin/lesspipe %s %s"
declare -x LESSOPEN="| /usr/bin/lesspipe %s"
declare -x LOGNAME="onlylove"
declare -x LS_COLORS="rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:"
declare -x MOTD_SHOWN="pam"
declare -x OLDPWD
declare -x PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin"
declare -x PWD="/home/onlylove"
declare -x SHELL="/bin/bash"
declare -x SHLVL="1"
declare -x SSH_CLIENT="192.168.6.1 8528 22"
declare -x SSH_CONNECTION="192.168.6.1 8528 192.168.6.128 22"
declare -x SSH_TTY="/dev/pts/2"
declare -x TERM="xterm"
declare -x USER="onlylove"
declare -x XDG_DATA_DIRS="/usr/local/share:/usr/share:/var/lib/snapd/desktop"
declare -x XDG_RUNTIME_DIR="/run/user/1000"
declare -x XDG_SESSION_CLASS="user"
declare -x XDG_SESSION_ID="7"
declare -x XDG_SESSION_TYPE="tty"
onlylove@ubuntu:~$
通过对比可以看出，配置后环境变量增加如下内容：
declare -x ARCH="arm"
declare -x CROSS_COMPILE="arm-linux-gnueabihf-"
2、清除
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ ls
api cmd configs drivers fs Kconfig MAINTAINERS net scripts tools
arch common disk dts include lib MAKEALL post snapshot.commit
board config.mk doc examples Kbuild Licenses Makefile README test
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ make clean
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$
3、配置
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ make mx6ull_14x14_evk_defconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
SHIPPED scripts/kconfig/zconf.tab.c
SHIPPED scripts/kconfig/zconf.lex.c
SHIPPED scripts/kconfig/zconf.hash.c
HOSTCC scripts/kconfig/zconf.tab.o
In file included from scripts/kconfig/zconf.tab.c:2534:
scripts/kconfig/confdata.c: In function ‘conf_write’:
scripts/kconfig/confdata.c:771:19: warning: ‘%s’ directive writing likely 7 or more bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
771 | sprintf(newname, "%s%s", dirname, basename);
| ^~~~~~
scripts/kconfig/confdata.c:771:19: note: assuming directive output of 7 bytes
In file included from /usr/include/stdio.h:867,
from scripts/kconfig/zconf.tab.c:84:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:36:10: note: ‘__builtin___sprintf_chk’ output 1 or more bytes (assuming 4104) into a destination of size 4097
36 | return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
37 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from scripts/kconfig/zconf.tab.c:2534:
scripts/kconfig/confdata.c:774:20: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
774 | sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
| ^~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:867,
from scripts/kconfig/zconf.tab.c:84:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:36:10: note: ‘__builtin___sprintf_chk’ output between 13 and 4119 bytes into a destination of size 4097
36 | return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
37 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$
通过以上打印信息反馈，虽然有警告，但配置文件 .config 成功生成。
注：警告目前未解决
.config 配置文件内容如下：
#
# Automatically generated file; DO NOT EDIT.
# U-Boot 2016.03 Configuration
#
CONFIG_CREATE_ARCH_SYMLINK=y
CONFIG_HAVE_GENERIC_BOARD=y
CONFIG_SYS_GENERIC_BOARD=y
# CONFIG_ARC is not set
CONFIG_ARM=y
# CONFIG_AVR32 is not set
# CONFIG_BLACKFIN is not set
# CONFIG_M68K is not set
# CONFIG_MICROBLAZE is not set
# CONFIG_MIPS is not set
# CONFIG_NDS32 is not set
# CONFIG_NIOS2 is not set
# CONFIG_OPENRISC is not set
# CONFIG_PPC is not set
# CONFIG_SANDBOX is not set
# CONFIG_SH is not set
# CONFIG_SPARC is not set
# CONFIG_X86 is not set
CONFIG_SYS_ARCH="arm"
CONFIG_SYS_CPU="armv7"
CONFIG_SYS_SOC="mx6"
CONFIG_SYS_VENDOR="freescale"
CONFIG_SYS_BOARD="mx6ullevk"
CONFIG_SYS_CONFIG_NAME="mx6ullevk"
#
# ARM architecture（ARM架构）
#
CONFIG_HAS_VBAR=y
CONFIG_HAS_THUMB2=y
CONFIG_CPU_V7=y
# CONFIG_SEMIHOSTING is not set
CONFIG_SYS_L2CACHE_OFF=y
# CONFIG_ARCH_AT91 is not set
# CONFIG_TARGET_EDB93XX is not set
# CONFIG_TARGET_VCMA9 is not set
# CONFIG_TARGET_SMDK2410 is not set
# CONFIG_TARGET_ASPENITE is not set
# CONFIG_TARGET_GPLUGD is not set
# CONFIG_ARCH_DAVINCI is not set
# CONFIG_KIRKWOOD is not set
# CONFIG_ARCH_MVEBU is not set
# CONFIG_TARGET_DEVKIT3250 is not set
# CONFIG_TARGET_WORK_92105 is not set
# CONFIG_TARGET_MX25PDK is not set
# CONFIG_TARGET_ZMX25 is not set
# CONFIG_TARGET_APF27 is not set
# CONFIG_TARGET_APX4DEVKIT is not set
# CONFIG_TARGET_XFI3 is not set
# CONFIG_TARGET_M28EVK is not set
# CONFIG_TARGET_MX23EVK is not set
# CONFIG_TARGET_MX28EVK is not set
# CONFIG_TARGET_MX23_OLINUXINO is not set
# CONFIG_TARGET_BG0900 is not set
# CONFIG_TARGET_SANSA_FUZE_PLUS is not set
# CONFIG_TARGET_SC_SPS_1 is not set
# CONFIG_ORION5X is not set
# CONFIG_TARGET_SPEAR300 is not set
# CONFIG_TARGET_SPEAR310 is not set
# CONFIG_TARGET_SPEAR320 is not set
# CONFIG_TARGET_SPEAR600 is not set
# CONFIG_TARGET_STV0991 is not set
# CONFIG_TARGET_X600 is not set
# CONFIG_TARGET_IMX31_PHYCORE is not set
# CONFIG_TARGET_MX31ADS is not set
# CONFIG_TARGET_MX31PDK is not set
# CONFIG_TARGET_WOODBURN is not set
# CONFIG_TARGET_WOODBURN_SD is not set
# CONFIG_TARGET_FLEA3 is not set
# CONFIG_TARGET_MX35PDK is not set
# CONFIG_ARCH_BCM283X is not set
# CONFIG_TARGET_VEXPRESS_CA15_TC2 is not set
# CONFIG_TARGET_VEXPRESS_CA5X2 is not set
# CONFIG_TARGET_VEXPRESS_CA9X4 is not set
# CONFIG_TARGET_KWB is not set
# CONFIG_TARGET_TSERIES is not set
# CONFIG_TARGET_CM_T335 is not set
# CONFIG_TARGET_PEPPER is not set
# CONFIG_TARGET_AM335X_IGEP0033 is not set
# CONFIG_TARGET_PCM051 is not set
# CONFIG_TARGET_DRACO is not set
# CONFIG_TARGET_THUBAN is not set
# CONFIG_TARGET_RASTABAN is not set
# CONFIG_TARGET_PXM2 is not set
# CONFIG_TARGET_RUT is not set
# CONFIG_TARGET_PENGWYN is not set
# CONFIG_TARGET_AM335X_BALTOS is not set
# CONFIG_TARGET_AM335X_EVM is not set
# CONFIG_TARGET_AM335X_SL50 is not set
# CONFIG_TARGET_AM43XX_EVM is not set
# CONFIG_TARGET_BAV335X is not set
# CONFIG_TARGET_TI814X_EVM is not set
# CONFIG_TARGET_TI816X_EVM is not set
# CONFIG_TARGET_BCM28155_AP is not set
# CONFIG_TARGET_BCMCYGNUS is not set
# CONFIG_TARGET_BCMNSP is not set
# CONFIG_ARCH_EXYNOS is not set
# CONFIG_ARCH_S5PC1XX is not set
# CONFIG_ARCH_HIGHBANK is not set
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_KEYSTONE is not set
# CONFIG_ARCH_MX7 is not set
CONFIG_ARCH_MX6=y
# CONFIG_ARCH_MX5 is not set
# CONFIG_TARGET_M53EVK is not set
# CONFIG_TARGET_MX51EVK is not set
# CONFIG_TARGET_MX53ARD is not set
# CONFIG_TARGET_MX53EVK is not set
# CONFIG_TARGET_MX53LOCO is not set
# CONFIG_TARGET_MX53SMD is not set
# CONFIG_OMAP34XX is not set
# CONFIG_OMAP44XX is not set
# CONFIG_OMAP54XX is not set
# CONFIG_RMOBILE is not set
# CONFIG_ARCH_SOCFPGA is not set
# CONFIG_TARGET_CM_T43 is not set
# CONFIG_ARCH_SUNXI is not set
# CONFIG_TARGET_TS4800 is not set
# CONFIG_TARGET_VF610TWR is not set
# CONFIG_TARGET_COLIBRI_VF is not set
# CONFIG_TARGET_PCM052 is not set
# CONFIG_ARCH_ZYNQ is not set
# CONFIG_ARCH_ZYNQMP is not set
# CONFIG_TEGRA is not set
# CONFIG_TARGET_VEXPRESS64_AEMV8A is not set
# CONFIG_TARGET_VEXPRESS64_BASE_FVP is not set
# CONFIG_TARGET_VEXPRESS64_BASE_FVP_DRAM is not set
# CONFIG_TARGET_VEXPRESS64_JUNO is not set
# CONFIG_TARGET_LS2080A_EMU is not set
# CONFIG_TARGET_LS2080A_SIMU is not set
# CONFIG_TARGET_LS2080AQDS is not set
# CONFIG_TARGET_LS2080ARDB is not set
# CONFIG_TARGET_HIKEY is not set
# CONFIG_TARGET_LS1021AQDS is not set
# CONFIG_TARGET_LS1021ATWR is not set
# CONFIG_TARGET_LS1043AQDS is not set
# CONFIG_TARGET_LS1043ARDB is not set
# CONFIG_TARGET_H2200 is not set
# CONFIG_TARGET_COLIBRI_PXA270 is not set
# CONFIG_ARCH_UNIPHIER is not set
# CONFIG_STM32 is not set
# CONFIG_ARCH_ROCKCHIP is not set
# CONFIG_TARGET_THUNDERX_88XX is not set
CONFIG_SYS_MALLOC_F_LEN=0x400
CONFIG_MX6=y
CONFIG_MX6UL=y
CONFIG_MX6ULL=y
# CONFIG_TARGET_ARISTAINETOS is not set
# CONFIG_TARGET_ARISTAINETOS2 is not set
# CONFIG_TARGET_ARISTAINETOS2B is not set
# CONFIG_TARGET_CGTQMX6EVAL is not set
# CONFIG_TARGET_CM_FX6 is not set
# CONFIG_TARGET_EMBESTMX6BOARDS is not set
# CONFIG_TARGET_GW_VENTANA is not set
# CONFIG_TARGET_KOSAGI_NOVENA is not set
# CONFIG_TARGET_MX6CUBOXI is not set
# CONFIG_TARGET_MX6QARM2 is not set
# CONFIG_TARGET_MX6QSABREAUTO is not set
# CONFIG_TARGET_MX6SABRESD is not set
# CONFIG_TARGET_MX6SLEVK is not set
# CONFIG_TARGET_MX6SLLEVK is not set
# CONFIG_TARGET_MX6SLL_ARM2 is not set
# CONFIG_TARGET_MX6SXSABRESD is not set
# CONFIG_TARGET_MX6SXSABREAUTO is not set
# CONFIG_TARGET_MX6UL_9X9_EVK is not set
# CONFIG_TARGET_MX6UL_14X14_EVK is not set
# CONFIG_TARGET_MX6UL_14X14_DDR3_ARM2 is not set
# CONFIG_TARGET_MX6UL_14X14_LPDDR2_ARM2 is not set
# CONFIG_TARGET_MX6SX_17X17_ARM2 is not set
# CONFIG_TARGET_MX6SX_19X19_ARM2 is not set
# CONFIG_TARGET_PICOSOM_IMX6UL is not set
# CONFIG_TARGET_NITROGEN6X is not set
# CONFIG_TARGET_OT1200 is not set
# CONFIG_TARGET_PLATINUM_PICON is not set
# CONFIG_TARGET_PLATINUM_TITANIUM is not set
# CONFIG_TARGET_MX6ULL_DDR3_ARM2 is not set
CONFIG_TARGET_MX6ULL_14X14_EVK=y
# CONFIG_TARGET_MX6ULL_9X9_EVK is not set
# CONFIG_TARGET_SECOMX6 is not set
# CONFIG_TARGET_TBS2910 is not set
# CONFIG_TARGET_TITANIUM is not set
# CONFIG_TARGET_TQMA6 is not set
# CONFIG_TARGET_UDOO is not set
# CONFIG_TARGET_WANDBOARD is not set
# CONFIG_TARGET_WARP is not set
# CONFIG_TARGET_MX6DQSCM is not set
# CONFIG_TARGET_MX6SXSCM is not set
CONFIG_SYS_MALLOC_F=y
# CONFIG_DM_SERIAL is not set
# CONFIG_DM_SPI is not set
# CONFIG_DM_I2C is not set
# CONFIG_DM_GPIO is not set
CONFIG_ROM_UNIFIED_SECTIONS=y
# CONFIG_IMX_RDC is not set
# CONFIG_IMX_BOOTAUX is not set
#
# ARM debug（ARM调试）
#
# CONFIG_DEBUG_LL is not set
# CONFIG_DM_KEYBOARD is not set
CONFIG_DEFAULT_DEVICE_TREE=""
#
# General setup（一般设置）
#
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_EXPERT=y
CONFIG_SYS_MALLOC_CLEAR_ON_INIT=y
#
# Boot images（启动映像）
#
# CONFIG_FIT is not set
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ullevk/imximage.cfg"
#
# Boot timing（开机时间）
#
# CONFIG_BOOTSTAGE is not set
CONFIG_BOOTSTAGE_USER_COUNT=20
CONFIG_BOOTSTAGE_STASH_ADDR=0
CONFIG_BOOTSTAGE_STASH_SIZE=4096
# CONFIG_CONSOLE_RECORD is not set
#
# Command line interface（命令行界面）
#
# CONFIG_HUSH_PARSER is not set
CONFIG_SYS_PROMPT="=> "
#
# Autoboot options（自动启动选项）
#
# CONFIG_AUTOBOOT_KEYED is not set
#
# Commands（命令）
#
#
# Info commands（信息命令）
#
CONFIG_CMD_BDI=y
CONFIG_CMD_CONSOLE=y
# CONFIG_CMD_CPU is not set
# CONFIG_CMD_LICENSE is not set
#
# Boot commands（启动命令）
#
CONFIG_CMD_BOOTD=y
CONFIG_CMD_BOOTM=y
CONFIG_CMD_ELF=y
CONFIG_CMD_GO=y
CONFIG_CMD_RUN=y
CONFIG_CMD_IMI=y
CONFIG_CMD_IMLS=y
CONFIG_CMD_XIMG=y
#
# Environment commands（环境命令）
#
CONFIG_CMD_EXPORTENV=y
CONFIG_CMD_IMPORTENV=y
CONFIG_CMD_EDITENV=y
CONFIG_CMD_SAVEENV=y
CONFIG_CMD_ENV_EXISTS=y
#
# Memory commands（内存命令）
#
CONFIG_CMD_MEMORY=y
CONFIG_CMD_CRC32=y
# CONFIG_LOOPW is not set
# CONFIG_CMD_MEMTEST is not set
# CONFIG_CMD_MX_CYCLIC is not set
# CONFIG_CMD_MEMINFO is not set
#
# Device access commands（设备访问命令）
#
CONFIG_CMD_DM=y
# CONFIG_CMD_DEMO is not set
CONFIG_CMD_LOADB=y
CONFIG_CMD_LOADS=y
CONFIG_CMD_FLASH=y
# CONFIG_CMD_NAND is not set
# CONFIG_CMD_SF is not set
# CONFIG_CMD_SPI is not set
# CONFIG_CMD_I2C is not set
# CONFIG_CMD_USB is not set
CONFIG_CMD_FPGA=y
CONFIG_CMD_GPIO=y
#
# Shell scripting commands（Shell 脚本命令）
#
CONFIG_CMD_ECHO=y
CONFIG_CMD_ITEST=y
CONFIG_CMD_SOURCE=y
CONFIG_CMD_SETEXPR=y
#
# Network commands（网络命令）
#
CONFIG_CMD_NET=y
# CONFIG_CMD_TFTPPUT is not set
# CONFIG_CMD_TFTPSRV is not set
# CONFIG_CMD_RARP is not set
# CONFIG_CMD_DHCP is not set
CONFIG_CMD_NFS=y
# CONFIG_CMD_PING is not set
# CONFIG_CMD_CDP is not set
# CONFIG_CMD_SNTP is not set
# CONFIG_CMD_DNS is not set
# CONFIG_CMD_LINK_LOCAL is not set
#
# Misc commands（杂项命令）
#
# CONFIG_CMD_TIME is not set
CONFIG_CMD_MISC=y
# CONFIG_CMD_TIMER is not set
#
# Power commands（电源指令）
#
#
# Security commands（安全命令）
#
CONFIG_SUPPORT_OF_CONTROL=y
#
# Device Tree Control（设备树控制）
#
# CONFIG_OF_CONTROL is not set
CONFIG_NET=y
# CONFIG_NET_RANDOM_ETHADDR is not set
# CONFIG_NETCONSOLE is not set
CONFIG_NET_TFTP_VARS=y
#
# Device Drivers（设备驱动程序）
#
#
# Generic Driver Options（通用驱动程序选项）
#
CONFIG_DM=y
CONFIG_DM_WARN=y
CONFIG_DM_DEVICE_REMOVE=y
CONFIG_DM_STDIO=y
CONFIG_DM_SEQ_ALIAS=y
# CONFIG_SPL_DM_SEQ_ALIAS is not set
# CONFIG_REGMAP is not set
# CONFIG_SPL_REGMAP is not set
# CONFIG_DEVRES is not set
# CONFIG_ADC is not set
# CONFIG_ADC_EXYNOS is not set
# CONFIG_ADC_SANDBOX is not set
CONFIG_DISK=y
#
# Clock（时钟）
#
# CONFIG_CLK is not set
# CONFIG_CPU is not set
#
# Hardware crypto devices（硬件加密设备）
#
# CONFIG_FSL_CAAM is not set
#
# Demo for driver model（驱动模型演示）
#
# CONFIG_DM_DEMO is not set
#
# DFU support（DFU 支持）
#
# CONFIG_DFU_TFTP is not set
#
# DMA Support（DMA 支持）
#
# CONFIG_DMA is not set
# CONFIG_TI_EDMA3 is not set
#
# GPIO Support（GPIO 支持）
#
# CONFIG_ATMEL_PIO4 is not set
# CONFIG_LPC32XX_GPIO is not set
# CONFIG_VYBRID_GPIO is not set
#
# I2C support（I2C 支持）
#
# CONFIG_DM_I2C_COMPAT is not set
# CONFIG_CROS_EC_KEYB is not set
#
# LED Support（LED 支持）
#
# CONFIG_LED is not set
#
# Multifunction device drivers（多功能设备驱动程序）
#
# CONFIG_MISC is not set
# CONFIG_CROS_EC is not set
# CONFIG_FSL_SEC_MON is not set
# CONFIG_MXC_OCOTP is not set
# CONFIG_PWRSEQ is not set
# CONFIG_PCA9551_LED is not set
# CONFIG_RESET is not set
# CONFIG_WINBOND_W83627 is not set
#
# MMC Host controller Support（MMC 主机控制器支持）
#
# CONFIG_DM_MMC is not set
#
# MTD Support（MTD 支持）
#
# CONFIG_MTD is not set
#
# NAND Device Support（NAND 设备支持）
#
# CONFIG_NAND_DENALI is not set
# CONFIG_NAND_VF610_NFC is not set
# CONFIG_NAND_PXA3XX is not set
# CONFIG_NAND_ARASAN is not set
#
# Generic NAND options（通用 NAND 选项）
#
#
# SPI Flash Support（SPI 闪存支持）
#
# CONFIG_SPI_FLASH is not set
# CONFIG_DM_ETH is not set
# CONFIG_PHYLIB is not set
# CONFIG_NETDEVICES is not set
#
# PCI
#
# CONFIG_DM_PCI is not set
#
# Pin controllers（引脚控制器）
#
# CONFIG_PINCTRL is not set
#
# Power
#
# CONFIG_DM_PMIC is not set
# CONFIG_DM_REGULATOR is not set
# CONFIG_DM_PWM is not set
# CONFIG_RAM is not set
#
# Remote Processor drivers（远程处理器驱动程序）
#
#
# Real Time Clock（实时时钟）
#
# CONFIG_DM_RTC is not set
#
# Serial drivers（串行驱动程序）
#
# CONFIG_DEBUG_UART is not set
# CONFIG_DEBUG_UART_SKIP_INIT is not set
# CONFIG_FSL_LPUART is not set
# CONFIG_SYS_NS16550 is not set
#
# Sound support（声音支持）
#
# CONFIG_SOUND is not set
#
# SPI Support（SPI 支持）
#
# CONFIG_FSL_ESPI is not set
# CONFIG_TI_QSPI is not set
CONFIG_DM_THERMAL=y
#
# Timer Support（定时器支持）
#
# CONFIG_TIMER is not set
#
# TPM support（TPM 支持）
#
# CONFIG_USB is not set
#
# Graphics support（图形支持）
#
# CONFIG_DM_VIDEO is not set
#
# TrueType Fonts（TrueType 字体）
#
# CONFIG_VIDEO_VESA is not set
# CONFIG_VIDEO_LCD_ANX9804 is not set
# CONFIG_VIDEO_LCD_SSD2828 is not set
# CONFIG_VIDEO_MVEBU is not set
# CONFIG_DISPLAY is not set
# CONFIG_VIDEO_BRIDGE is not set
# CONFIG_PHYS_TO_BUS is not set
#
# File systems（文件系统）
#
#
# Library routines（库例程）
#
# CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED is not set
CONFIG_HAVE_PRIVATE_LIBGCC=y
# CONFIG_USE_PRIVATE_LIBGCC is not set
CONFIG_SYS_HZ=1000
# CONFIG_USE_TINY_PRINTF is not set
CONFIG_REGEX=y
# CONFIG_LIB_RAND is not set
# CONFIG_CMD_DHRYSTONE is not set
# CONFIG_RSA is not set
# CONFIG_TPM is not set
#
# Hashing Support（哈希支持）
#
# CONFIG_SHA1 is not set
# CONFIG_SHA256 is not set
# CONFIG_SHA_HW_ACCEL is not set
#
# Compression Support（压缩支持）
#
# CONFIG_LZ4 is not set
# CONFIG_ERRNO_STR is not set
# CONFIG_UNIT_TEST is not set
4、编译
make u-boot.imx
编译日志输出如下：
scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config.h
GEN include/autoconf.mk
GEN include/autoconf.mk.dep
CHK include/config/uboot.release
CHK include/generated/version_autogenerated.h
CHK include/generated/timestamp_autogenerated.h
UPD include/generated/timestamp_autogenerated.h
CC lib/asm-offsets.s
CHK include/generated/generic-asm-offsets.h
CC arch/arm/lib/asm-offsets.s
CHK include/generated/asm-offsets.h
HOSTCC tools/bmp_logo
HOSTCC tools/gen_eth_addr
HOSTCC tools/img2srec
HOSTCC tools/mkenvimage.o
HOSTCC tools/os_support.o
WRAP tools/lib/crc32.c
HOSTCC tools/lib/crc32.o
HOSTLD tools/mkenvimage
HOSTCC tools/aisimage.o
HOSTCC tools/atmelimage.o
WRAP tools/common/bootm.c
HOSTCC tools/common/bootm.o
HOSTCC tools/default_image.o
WRAP tools/lib/fdtdec_common.c
HOSTCC tools/lib/fdtdec_common.o
WRAP tools/lib/fdtdec.c
HOSTCC tools/lib/fdtdec.o
HOSTCC tools/fit_common.o
HOSTCC tools/fit_image.o
HOSTCC tools/gpimage.o
HOSTCC tools/gpimage-common.o
WRAP tools/common/image-fit.c
HOSTCC tools/common/image-fit.o
HOSTCC tools/image-host.o
WRAP tools/common/image.c
HOSTCC tools/common/image.o
HOSTCC tools/imagetool.o
HOSTCC tools/imximage.o
HOSTCC tools/kwbimage.o
WRAP tools/lib/md5.c
HOSTCC tools/lib/md5.o
HOSTCC tools/lpc32xximage.o
HOSTCC tools/mxsimage.o
HOSTCC tools/omapimage.o
HOSTCC tools/pblimage.o
HOSTCC tools/pbl_crc32.o
WRAP tools/lib/rc4.c
HOSTCC tools/lib/rc4.o
HOSTCC tools/rkcommon.o
HOSTCC tools/rkimage.o
HOSTCC tools/rksd.o
HOSTCC tools/rkspi.o
HOSTCC tools/socfpgaimage.o
WRAP tools/lib/sha1.c
HOSTCC tools/lib/sha1.o
WRAP tools/lib/sha256.c
HOSTCC tools/lib/sha256.o
WRAP tools/common/hash.c
HOSTCC tools/common/hash.o
HOSTCC tools/ublimage.o
HOSTCC tools/zynqimage.o
WRAP tools/lib/libfdt/fdt.c
HOSTCC tools/lib/libfdt/fdt.o
WRAP tools/lib/libfdt/fdt_ro.c
HOSTCC tools/lib/libfdt/fdt_ro.o
WRAP tools/lib/libfdt/fdt_rw.c
HOSTCC tools/lib/libfdt/fdt_rw.o
WRAP tools/lib/libfdt/fdt_strerror.c
HOSTCC tools/lib/libfdt/fdt_strerror.o
WRAP tools/lib/libfdt/fdt_wip.c
HOSTCC tools/lib/libfdt/fdt_wip.o
WRAP tools/lib/libfdt/fdt_region.c
HOSTCC tools/lib/libfdt/fdt_region.o
HOSTCC tools/dumpimage.o
HOSTLD tools/dumpimage
HOSTCC tools/mkimage.o
HOSTLD tools/mkimage
HOSTCC tools/proftool
HOSTCC tools/fdtgrep.o
HOSTLD tools/fdtgrep
tools/bmp_logo --gen-info ./tools/logos/freescale.bmp > include/bmp_logo.h
tools/bmp_logo --gen-data ./tools/logos/freescale.bmp > include/bmp_logo_data.h
LD arch/arm/cpu/built-in.o
CC arch/arm/cpu/armv7/cache_v7.o
CC arch/arm/cpu/armv7/cpu.o
CC arch/arm/cpu/armv7/cp15.o
CC arch/arm/cpu/armv7/syslib.o
AS arch/arm/cpu/armv7/lowlevel_init.o
CC arch/arm/cpu/armv7/mx6/soc.o
CC arch/arm/cpu/armv7/mx6/clock.o
LD arch/arm/cpu/armv7/mx6/built-in.o
LD arch/arm/cpu/armv7/built-in.o
AS arch/arm/cpu/armv7/start.o
CC arch/arm/imx-common/iomux-v3.o
CC arch/arm/imx-common/cpu.o
CC arch/arm/imx-common/speed.o
CC arch/arm/imx-common/i2c-mxv7.o
CC arch/arm/imx-common/misc.o
CC arch/arm/imx-common/cache.o
CC arch/arm/imx-common/init.o
CC arch/arm/imx-common/video.o
CC arch/arm/imx-common/syscounter.o
CC arch/arm/imx-common/cmd_bmode.o
LD arch/arm/imx-common/built-in.o
AS arch/arm/lib/vectors.o
AS arch/arm/lib/crt0.o
AS arch/arm/lib/relocate.o
CC arch/arm/lib/bootm-fdt.o
CC arch/arm/lib/bootm.o
CC arch/arm/lib/sections.o
CC arch/arm/lib/stack.o
CC arch/arm/lib/interrupts.o
CC arch/arm/lib/reset.o
CC arch/arm/lib/cache.o
CC arch/arm/lib/cache-cp15.o
LD arch/arm/lib/built-in.o
AR arch/arm/lib/lib.a
CC arch/arm/lib/eabi_compat.o
CC board/freescale/common/mmc.o
LD board/freescale/common/built-in.o
CC board/freescale/mx6ullevk/mx6ullevk.o
LD board/freescale/mx6ullevk/built-in.o
CC cmd/boot.o
CC cmd/bootm.o
CC cmd/help.o
CC cmd/version.o
CC cmd/source.o
CC cmd/bdinfo.o
CC cmd/bmp.o
CC cmd/cache.o
CC cmd/console.o
CC cmd/echo.o
CC cmd/elf.o
CC cmd/exit.o
CC cmd/ext4.o
CC cmd/ext2.o
CC cmd/fat.o
CC cmd/fdt.o
CC cmd/flash.o
CC cmd/fs.o
CC cmd/fuse.o
CC cmd/gpio.o
CC cmd/i2c.o
CC cmd/itest.o
CC cmd/load.o
CC cmd/mem.o
CC cmd/mii.o
CC cmd/mdio.o
CC cmd/misc.o
CC cmd/mmc.o
CC cmd/net.o
CC cmd/pcmcia.o
CC cmd/sf.o
CC cmd/setexpr.o
CC cmd/test.o
CC cmd/usb.o
CC cmd/ximg.o
CC cmd/nvedit.o
CC cmd/disk.o
LD cmd/built-in.o
CC common/init/board_init.o
LD common/init/built-in.o
CC common/main.o
CC common/exports.o
CC common/hash.o
CC common/cli_hush.o
CC common/autoboot.o
CC common/board_f.o
CC common/board_r.o
CC common/board_info.o
CC common/bootm.o
CC common/bootm_os.o
CC common/env_attr.o
CC common/env_callback.o
CC common/env_flags.o
CC common/env_mmc.o
CC common/fdt_support.o
CC common/miiphyutil.o
CC common/usb.o
CC common/usb_hub.o
CC common/usb_storage.o
CC common/flash.o
CC common/splash.o
CC common/env_common.o
CC common/bouncebuf.o
CC common/console.o
CC common/dlmalloc.o
CC common/malloc_simple.o
CC common/image.o
CC common/image-fdt.o
CC common/memsize.o
CC common/stdio.o
CC common/cli_simple.o
CC common/cli.o
CC common/cli_readline.o
CC common/command.o
CC common/s_record.o
CC common/xyzModem.o
LD common/built-in.o
CC disk/part.o
CC disk/part_dos.o
LD disk/built-in.o
LD drivers/adc/built-in.o
CC drivers/block/disk-uclass.o
LD drivers/block/built-in.o
CC drivers/core/device.o
CC drivers/core/lists.o
CC drivers/core/root.o
CC drivers/core/uclass.o
CC drivers/core/util.o
CC drivers/core/device-remove.o
CC drivers/core/dump.o
LD drivers/core/built-in.o
CC drivers/crypto/fsl/sec.o
LD drivers/crypto/fsl/built-in.o
LD drivers/crypto/rsa_mod_exp/built-in.o
LD drivers/crypto/built-in.o
LD drivers/dfu/built-in.o
LD drivers/hwmon/built-in.o
CC drivers/input/input.o
LD drivers/input/built-in.o
LD drivers/memory/built-in.o
CC drivers/misc/mxc_ocotp.o
LD drivers/misc/built-in.o
CC drivers/pcmcia/tqm8xx_pcmcia.o
LD drivers/pcmcia/built-in.o
LD drivers/pwm/built-in.o
CC drivers/rtc/date.o
LD drivers/rtc/built-in.o
LD drivers/soc/built-in.o
LD drivers/sound/built-in.o
CC drivers/thermal/thermal-uclass.o
CC drivers/thermal/imx_thermal.o
LD drivers/thermal/built-in.o
LD drivers/timer/built-in.o
LD drivers/tpm/built-in.o
LD drivers/twserial/built-in.o
CC drivers/video/cfb_console.o
CC drivers/video/mxsfb.o
CC drivers/video/videomodes.o
LD drivers/video/bridge/built-in.o
LD drivers/video/built-in.o
CC drivers/watchdog/imx_watchdog.o
LD drivers/watchdog/built-in.o
LD drivers/built-in.o
LD drivers/dma/built-in.o
CC drivers/gpio/mxc_gpio.o
LD drivers/gpio/built-in.o
CC drivers/i2c/i2c_core.o
CC drivers/i2c/mxc_i2c.o
LD drivers/i2c/built-in.o
CC drivers/mmc/fsl_esdhc.o
CC drivers/mmc/mmc.o
CC drivers/mmc/mmc_write.o
LD drivers/mmc/built-in.o
CC drivers/mtd/mtdcore.o
CC drivers/mtd/mtd_uboot.o
LD drivers/mtd/built-in.o
LD drivers/mtd/onenand/built-in.o
CC drivers/mtd/spi/sf_probe.o
CC drivers/mtd/spi/spi_flash.o
CC drivers/mtd/spi/sf_params.o
CC drivers/mtd/spi/sf.o
LD drivers/mtd/spi/built-in.o
CC drivers/net/fec_mxc.o
LD drivers/net/built-in.o
CC drivers/net/phy/phy.o
CC drivers/net/phy/micrel.o
LD drivers/net/phy/built-in.o
LD drivers/pci/built-in.o
CC drivers/power/power_core.o
CC drivers/power/power_i2c.o
LD drivers/power/built-in.o
LD drivers/power/battery/built-in.o
LD drivers/power/fuel_gauge/built-in.o
LD drivers/power/mfd/built-in.o
CC drivers/power/pmic/pmic_pfuze3000.o
LD drivers/power/pmic/built-in.o
LD drivers/power/regulator/built-in.o
CC drivers/serial/serial.o
CC drivers/serial/serial_mxc.o
LD drivers/serial/built-in.o
CC drivers/spi/spi.o
CC drivers/spi/fsl_qspi.o
LD drivers/spi/built-in.o
LD drivers/usb/dwc3/built-in.o
LD drivers/usb/emul/built-in.o
CC drivers/usb/eth/usb_ether.o
CC drivers/usb/eth/asix.o
LD drivers/usb/eth/built-in.o
LD drivers/usb/gadget/built-in.o
LD drivers/usb/gadget/udc/built-in.o
CC drivers/usb/host/ehci-hcd.o
CC drivers/usb/host/ehci-mx6.o
LD drivers/usb/host/built-in.o
LD drivers/usb/musb-new/built-in.o
LD drivers/usb/musb/built-in.o
LD drivers/usb/phy/built-in.o
LD drivers/usb/ulpi/built-in.o
CC fs/fs.o
CC fs/ext4/ext4fs.o
CC fs/ext4/ext4_common.o
CC fs/ext4/dev.o
CC fs/ext4/ext4_write.o
CC fs/ext4/ext4_journal.o
CC fs/ext4/crc16.o
LD fs/ext4/built-in.o
CC fs/fat/fat.o
CC fs/fat/file.o
LD fs/fat/built-in.o
LD fs/built-in.o
CC lib/libfdt/fdt.o
CC lib/libfdt/fdt_ro.o
CC lib/libfdt/fdt_rw.o
CC lib/libfdt/fdt_strerror.o
CC lib/libfdt/fdt_sw.o
CC lib/libfdt/fdt_wip.o
CC lib/libfdt/fdt_empty_tree.o
CC lib/libfdt/fdt_addresses.o
CC lib/libfdt/fdt_region.o
LD lib/libfdt/built-in.o
CC lib/zlib/zlib.o
LD lib/zlib/built-in.o
CC lib/crc7.o
CC lib/crc8.o
CC lib/crc16.o
CC lib/gunzip.o
CC lib/initcall.o
CC lib/lmb.o
CC lib/ldiv.o
CC lib/net_utils.o
CC lib/qsort.o
CC lib/rc4.o
CC lib/strmhz.o
CC lib/list_sort.o
CC lib/hashtable.o
CC lib/errno.o
CC lib/display_options.o
CC lib/crc32.o
CC lib/ctype.o
CC lib/div64.o
CC lib/hang.o
CC lib/linux_compat.o
CC lib/linux_string.o
CC lib/membuff.o
CC lib/slre.o
CC lib/string.o
CC lib/time.o
CC lib/vsprintf.o
CC lib/panic.o
CC lib/strto.o
LD lib/built-in.o
CC net/checksum.o
CC net/arp.o
CC net/bootp.o
CC net/eth_legacy.o
CC net/eth_common.o
CC net/net.o
CC net/nfs.o
CC net/ping.o
CC net/tftp.o
LD net/built-in.o
LD test/built-in.o
CC test/dm/cmd_dm.o
LD test/dm/built-in.o
CC examples/standalone/stubs.o
LD examples/standalone/libstubs.o
CC examples/standalone/hello_world.o
LD examples/standalone/hello_world
OBJCOPY examples/standalone/hello_world.srec
OBJCOPY examples/standalone/hello_world.bin
LDS u-boot.lds
LD u-boot
OBJCOPY u-boot-nodtb.bin
COPY u-boot.bin
CFGS board/freescale/mx6ullevk/imximage.cfg.cfgtmp
MKIMAGE u-boot.imx
5、将镜像烧录到SD卡
dd if=<boot_image> of=/dev/sd<x> bs=1k seek=<offset> conv=fsync
根据实际SD卡设备，执行指令如下：
sudo dd if=u-boot.imx of=/dev/sdb bs=1k seek=1 conv=fsync
命令执行日志如下：
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ sudo dd if=u-boot.imx of=/dev/sdb bs=1k seek=1 conv=fsync
[sudo] password for onlylove:
415+0 records in
415+0 records out
424960 bytes (425 kB, 415 KiB) copied, 0.0871026 s, 4.9 MB/s
onlylove@ubuntu:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$
通过日志可以确定，将镜像烧录到SD卡成功。
6、将SD卡插入开发板进行验证
U-Boot 2016.03 (Jul 17 2021 - 05:53:06 -0700)
CPU: Freescale i.MX6ULL rev1.1 69 MHz (running at 396 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 44C
Reset cause: POR
Board: MX6ULL 14x14 EVK
I2C: ready
DRAM: 512 MiB
MMC: FSL_SDHC: 0, FSL_SDHC: 1
*** Warning - bad CRC, using default environment
Display: TFT43AB (480x272)
Video: 480x272x24
In: serial
Out: serial
Err: serial
switch to partitions #0, OK
mmc0 is current device
Net: Board Net Initialization Failed
No ethernet found.
Normal Boot
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
switch to partitions #0, OK
mmc0 is current device
reading boot.scr
** Unable to read file boot.scr **
reading zImage
** Unable to read file zImage **
Booting from net ...
No ethernet found.
No ethernet found.
Bad Linux ARM zImage magic!
=>
通过第一行编译时间可以看出，uboot编译成功。