Question

我正在尝试将openwrt移植到BBB。如标题所示，我无法在BeagleBone Black上启动openwrt。如果有人试图在BeagleBone Black（BBB）上做某事，你必须知道其闪存或SD卡中有两个分区。第一个分区是FAT32作为启动分区，第二个分区是Ext4作为linux根文件系统。

当我使用原始文件和Angstrom的BIN进行BBB时，我可以启动系统。我的工作与http://wiki.openwrt.org/toh/beaglebone/black#installation

有关

我做了很多实验：

在OPENWRT的snapshot上使用BIN和其他文件，rootfs等替换所有原始文件。当我打开BBB电源时，我看不到来自UART的任何日志。我认为快照上的 MLO 文件错误。
我只修改了uEvn.txt。我可以看到如下所示的日志。

gpio：引脚53（gpio 53）值为1
mmc0是当前设备
微SD卡发现
mmc0是当前设备
gpio：引脚54（gpio 54）值为1
在设备0上找到SD / MMC 阅读uEnv.txt
以3 ms（142.6 KiB / s）读取438个字节来自uEnv.txt的加载环境
从mmc导入环境...
运行uenvcmd ...
阅读zImage
在238毫秒内读取2051400字节（8.2 MiB / s）
阅读am335x-boneblack.dtb
**无法读取文件am335x-boneblack.dtb **
错误：未找到cmdline Flattened Device Tree
找不到有效的设备树
gpio：引脚55（gpio 55）的值为1
**找不到文件/ boot / uImage **
我只将快照上的zImage替换为我的flash。来自UART的日志显示，启动流程停止在

启动内核......

日志显示如下。

U-Boot SPL 2014.01-rc1-00172-ge7e17b0 (Dec 12 2013 - 15:20:09)
reading args
spl: error reading image args, err - -1
reading u-boot.img
reading u-boot.img


U-Boot 2014.01-rc1-00172-ge7e17b0 (Dec 12 2013 - 15:20:09)

I2C:   ready
DRAM:  512 MiB
WARNING: Caches not enabled
NAND:  0 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment

Net:   <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot:  0
mmc0 is current device
SD/MMC found on device 0
reading uEnv.txt
494 bytes read in 5 ms (95.7 KiB/s)
Loaded environment from uEnv.txt
Importing environment from mmc ...
Running uenvcmd ...
reading zImage
2187584 bytes read in 214 ms (9.7 MiB/s)
reading am335x-boneblack.dtb
25172 bytes read in 11 ms (2.2 MiB/s)
Kernel image @ 0x80200000 [ 0x000000 - 0x216140 ]

Starting kernel ...

在此步骤中，我发现snapshot上的文件可能不适合BBB。之后，我为BBB编译了自己的openwrt版本。并替换zImage。启动内核时问题仍然存在。

那么有没有人有一些将openwrt移植到BBB的经验？你能告诉我我应该怎么做移植。或者我做错了什么？

如果有人为BBB编译了您自己的openwrt版本，请将您的配置文件分享给我？

非常感谢。

首先发布我的uEvn.txtx：

cat /mnt/p1/uEnv.txt 
kernel_file=zImage
fdtfile=am335x-boneblack.dtb

loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${kernel_file}
loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${fdtfile}

console=ttyO0,115200n8
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=ext4 rootwait

mmcargs=setenv bootargs console=${console} root=${mmcroot} rootfstype=${mmcrootfstype} ${optargs}

uenvcmd=run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr}

optargs="debug init=/etc/preinit"

来自printenv的输出：

arch=arm
baudrate=115200
board=am335x
board_name=A335BNLT
board_rev=00A5
boot_fdt=try
bootcmd=i2c mw 0x24 1 0x3e; run findfdt; run mmcboot;setenv mmcdev 1; setenv bootpart 1:2; run mmcboot;run nandboot;
bootcount=1
bootdelay=1
bootdir=/boot
bootenv=uEnv.txt
bootfile=zImage
bootpart=0:2
console=ttyO0,115200n8
cpu=armv7
dfu_alt_info_emmc=rawemmc mmc 0 3751936
dfu_alt_info_mmc=boot part 0 1;rootfs part 0 2;MLO fat 0 1;MLO.raw mmc 100 100;u-boot.img.raw mmc 300 400;spl-os-args.raw mmc 80 80;spl-os-image.raw mmc 900 2000;spl-os-args fat 0 1;spl-os-image fat 0 1;u-boot.img fat 0 1;uEnv.txt fat 0 1
dfu_alt_info_nand=SPL part 0 1;SPL.backup1 part 0 2;SPL.backup2 part 0 3;SPL.backup3 part 0 4;u-boot part 0 5;u-boot-spl-os part 0 6;kernel part 0 8;rootfs part 0 9
dfu_alt_info_ram=kernel ram 0x80200000 0xD80000;fdt ram 0x80F80000 0x80000;ramdisk ram 0x81000000 0x4000000
ethact=cpsw
ethaddr=7c:66:9d:53:6f:07
fdt_high=0xffffffff
fdtaddr=0x80F80000
fdtfile=am335x-boneblack.dtb
filesize=1f8
findfdt=if test $board_name = A335BONE; then setenv fdtfile am335x-bone.dtb; fi; if test $board_name = A335BNLT; then setenv fdtfile am335x-boneblack.dtb; fi; if test $board_name = A33515BB; then setenv fdtfile am335x-evm.dtb; fi; if test $board_name = A335X_SK; then setenv fdtfile am335x-evmsk.dtb; fi; if test $fdtfile = undefined; then echo WARNING: Could not determine device tree to use; fi;
importbootenv=echo Importing environment from mmc ...; env import -t $loadaddr $filesize
kernel_file=zImage
loadaddr=0x80200000
loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}
loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${fdtfile}
loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz
loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${kernel_file}
mmcargs=setenv bootargs console=${console} root=${mmcroot}
mmcboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootenv; then echo Loaded environment from ${bootenv};run importbootenv;fi;if test -n $uenvcmd; then echo Running uenvcmd ...;run uenvcmd;fi;if run loadimage; then run mmcloados;fi;fi;
mmcdev=0
mmcloados=run mmcargs; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdtaddr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi;
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=ext4 rootwait
mtdids=nand0=omap2-nand.0
mtdparts=mtdparts=omap2-nand.0:128k(SPL),128k(SPL.backup1),128k(SPL.backup2),128k(SPL.backup3),1792k(u-boot),128k(u-boot-spl-os),128k(u-boot-env),5m(kernel),-(rootfs)
nandargs=setenv bootargs console=${console} ${optargs} root=${nandroot} rootfstype=${nandrootfstype}
nandboot=echo Booting from nand ...; run nandargs; nand read ${fdtaddr} u-boot-spl-os; nand read ${loadaddr} kernel; bootz ${loadaddr} - ${fdtaddr}
nandroot=ubi0:rootfs rw ubi.mtd=7,2048
nandrootfstype=ubifs rootwait=1
netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp
netboot=echo Booting from network ...; setenv autoload no; dhcp; tftp ${loadaddr} ${bootfile}; tftp ${fdtaddr} ${fdtfile}; run netargs; bootz ${loadaddr} - ${fdtaddr}
nfsopts=nolock
optargs="debug init=/etc/preinit"
ramargs=setenv bootargs console=${console} ${optargs} root=${ramroot} rootfstype=${ramrootfstype}
ramboot=echo Booting from ramdisk ...; run ramargs; bootz ${loadaddr} ${rdaddr} ${fdtaddr}
ramroot=/dev/ram0 rw ramdisk_size=65536 initrd=${rdaddr},64M
ramrootfstype=ext2
rdaddr=0x81000000
rootfstype=${mmcrootfstype} ${optargs}
rootpath=/export/rootfs
soc=am33xx
spiargs=setenv bootargs console=${console} ${optargs} root=${spiroot} rootfstype=${spirootfstype}
spiboot=echo Booting from spi ...; run spiargs; sf probe ${spibusno}:0; sf read ${loadaddr} ${spisrcaddr} ${spiimgsize}; bootz ${loadaddr}
spibusno=0
spiimgsize=0x362000
spiroot=/dev/mtdblock4 rw
spirootfstype=jffs2
spisrcaddr=0xe0000
static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off
stderr=serial
stdin=serial
stdout=serial
uenvcmd=printenv; run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} -
usbnet_devaddr=7c:66:9d:53:6f:07
vendor=ti
ver=U-Boot 2014.01-rc1-00172-ge7e17b0 (Dec 12 2013 - 15:20:09)

Environment size: 4451/131068 bytes

Answer 1

您的输出清楚地表明uBoot无法读取设备树二进制文件（am335x-boneblack.dtb）。确保您的FAT分区的根目录中也有该文件。它可以在构建输出中找到：openwrt / bin / omap / dtbs在创建OpenWRT之后。

无法启动openwrt for beagle bone black（BB-black）

1 个答案: