本帖最后由 lqland 于 2014-5-6 13:32 编辑
I.MX6Q U-BOOT启动参数中：
U-Boot 2009.08 (Aug 16 2013 - 12:04:20)
CPU: Freescale i.MX6 family TO1.2 at 792 MHz
Thermal sensor with ratio = 181
Temperature: 41 C, calibration data 0x57d4e57d
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: 0x63012 [POR ]
Boot Device: SD
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=11
Net: got MAC address from IIM: 00:04:9f:02:e3:88
FEC0 [PRIME]
Hit any key to stop autoboot: 0
MX6Q SABRESD U-Boot > print
baudrate=115200
ipaddr=192.168.1.103
serverip=192.168.1.101
netmask=255.255.255.0
rd_loadaddr=(0x1300000)
##########
## 把U-BOOT烧在SD卡上启动的
## 问题1.这里的 0x1300000 是如何知道为何是设置此值的？官方是否有相关文档体现此内容？
netdev=eth0
ethprime=FEC0
uboot=u-boot.bin
kernel=uImage
## 问题2. 此处是不是，也可表达为 bootfile=uImage 用kernel=与用bootfile= 有区别吗？
nfsroot=/opt/eldk/arm
bootargs_nfs=setenv bootargs ${bootargs} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp
bootcmd_net=run bootargs_base bootargs_nfs; tftpboot ${loadaddr} ${kernel}; bootm
ethact=FEC0
bootargs=console=ttymxc0,115200 root=/dev/mmcblk1p1 rootwait rw video=mxcfb1:dev=ldb,LDB-XGA,if=RGB666 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24
loadaddr=0x10800000
## 问题3.这里的 0x1800000 是如何知道为何是设置此值的？官方是否有相关文档体现此内容？
bootargs_base=setenv bootargs console=ttymxc0,115200
bootcmd_mmc=run bootargs_base bootargs_mmc;mmc dev 2;mmc read ${loadaddr} 0x800 0x2000;bootm
bootcmd=run bootcmd_mmc
bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk1p1 rootwait rw video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666ldb=sin1
bootdelay=3
stdin=serial
stdout=serial
stderr=serial
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