uboot 启动参数如下：
U-Boot 2009.08-dirty (12鏈?13 2016 - 17:07:44)
CPU: Freescale i.MX6 family TO1.5 at 792 MHz
Thermal sensor with ratio = 181
Temperature: 36 C, calibration data 0x57a4e869
mx6q pll1: 792MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock : 66000000Hz
ipg per clock : 66000000Hz
uart clock : 80000000Hz
cspi clock : 60000000Hz
ahb clock : 132000000Hz
axi clock : 264000000Hz
emi_slow clock: 132000000Hz
ddr clock : 528000000Hz
usdhc1 clock : 198000000Hz
usdhc2 clock : 198000000Hz
usdhc3 clock : 198000000Hz
usdhc4 clock : 198000000Hz
nfc clock : 24000000Hz
Board: i.MX6Q-SABRESD: unknown-board Board: 0x63015 [POR ]
Boot Device: MMC
I2C: ready
DRAM: 1 GB
MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3
In: serial
Out: serial
Err: serial
Found PFUZE100! deviceid=10,revid=21
Net: got MAC address from IIM: 00:00:00:00:00:00
FEC0 [PRIME]
Hit any key to stop autoboot: 0
MX6Q SABRESD U-Boot > print
bootdelay=3
baudrate=115200
ethaddr=00:21:54:98:65:32
ipaddr=192.168.0.200
serverip=192.168.0.174
netmask=255.255.255.0
loadaddr=0x10800000
rd_loadaddr=(0x1300000)
netdev=eth0
ethprime=FEC0
uboot=u-boot.bin
kernel=uImage
ethact=FEC0
bootargs_base=setenv bootargs console=ttymxc0,115200
bootcmd=run bootcmd_mmc
bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw
bootargs=console=ttymxc0,115200 root=/dev/mmcblk0p1 rootwait rw
bootcmd_mmc=run bootargs_base bootargs_mmc; mmc dev 3; mmc read ${loadaddr} 0x80
0 0x2000; bootm
stdin=serial
stdout=serial
stderr=serial
Environment size: 584/8188 bytes
MX6Q SABRESD U-Boot >
运**在了如下图所示这[img]个地方
lib80211: common routines for IEEE802.11 drivers
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
Bus freq driver module loaded
Bus freq driver Enabled
mxc_dvfs_core_probe
DVFS driver module loaded
regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN3: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN2: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN1: incomplete constraints, leaving on
regulator_init_complete: vmmc: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:01 UTC (1)
Waiting for root device /dev/mmcblk0p1... |
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