TI

BeagleBone U-Boot编译及添加Ext4支持

2019-07-15 15:32发布

站内问答 / TI MCU
7254 0 1151
BeagleBone U-Boot编译及添加Ext4支持

按照sitara-linuxsdk-sdg-05.04.01.00.pdf AMSDK u-boot User's Guide 编译MLO u-boot.img，启动时出现如下错误：
  • Uncompressing Linux... done, booting the kernel.
  • [    0.068275] _omap_mux_get_by_name: Could not find signal uart1_cts.uart1_cts
  • [    0.068294] omap_hwmod_mux_init: Could not allocate device mux entry
  • [    0.068448] _omap_mux_get_by_name: Could not find signal uart2_cts.uart2_cts
  • [    0.068466] omap_hwmod_mux_init: Could not allocate device mux entry
  • [    0.068623] _omap_mux_get_by_name: Could not find signal uart3_cts_rctx.uart3_cts_rctx
  • [    0.068642] omap_hwmod_mux_init: Could not allocate device mux entry
  • [    0.106262] cpuidle-am33xx cpuidle-am33xx.0: failed to register driver
  • [    0.261045] _omap_mux_get_by_name: Could not find signal leds-gpio
  • [    0.651859] omap2_set_init_voltage: unable to get clk dpll1_ck
  • [    0.658045] omap2_set_init_voltage: unable to set vdd_mpu_iva
  • [    0.664063] omap2_set_init_voltage: unable to get clk l3_ick
  • [    0.670000] omap2_set_init_voltage: unable to set vdd_core
  • <b><font color="#ff0000">[    0.897931] EXT3-fs (mmcblk0p2): error: couldn't mount because of unsupported optional features (40)
  • [    0.907766] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)</font></b>

复制代码
很明显，SD卡的mmcblk0p2这个分区是EXT4文件系统，而u-boot中并未支出EXT4，所以需要修改相关文件：
u-boot源码下的include/configs/am335x_evm.h
  • /* HSMMC support */
  • #ifdef CONFIG_MMC
  • #define CONFIG_GENERIC_MMC
  • #define CONFIG_OMAP_HSMMC
  • #define CONFIG_CMD_MMC
  • #define CONFIG_DOS_PARTITION
  • #define CONFIG_CMD_FAT
  • #define CONFIG_CMD_EXT2
  • <b><font color="#ff0000">#define CONFIG_CMD_EXT4/*2013-12-12*/</font></b>

复制代码
添加#define CONFIG_CMD_EXT4
  • #define CONFIG_EXTRA_ENV_SETTINGS
  •         "bootfile=uImage"
  •         "loadaddr=0x82000000"
  •         "kloadaddr=0x80007fc0"
  •         "script_addr=0x81900000"
  •         "console=ttyO0,115200n8"
  •         "mmc_dev=0"
  •         "mmc_root=/dev/mmcblk0p2 rw"
  •         "nand_root=ubi0:rootfs rw ubi.mtd=7,2048"
  •         "spi_root=/dev/mtdblock4 rw"
  •         "nor_root=/dev/mtdblock3 rw"
  • <b><font color="#ff0000">        "mmc_root_fs_type=ext4 rootwait" </font></b>
  •         "nand_root_fs_type=ubifs rootwait=1"
  •         "spi_root_fs_type=jffs2"
  •         "nor_root_fs_type=jffs2"
  •         "nand_src_addr=0x280000"
  •         "spi_src_addr=0x62000"
  •         "nor_src_addr=0x08080000"
  •         "nand_img_siz=0x500000"
  •         "spi_img_siz=0x380000"
  •         "nor_img_siz=0x280000"
  •         "spi_bus_no=0"
  •         "rootpath=/export/rootfs"
  •         "nfsopts=nolock"
  •         "static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}"
  •                         "::off"
  •         "ip_method=none"
  •         "bootenv=uEnv.txt"
  •         "loadbootenv=fatload mmc ${mmc_dev} ${loadaddr} ${bootenv}"
  •         "importbootenv=echo Importing environment from mmc ...; "
  •                 "env import -t $loadaddr $filesize"
  •         "mmc_load_uimage=fatload mmc ${mmc_dev} ${kloadaddr} ${bootfile}"
  •         "optargs="
  •         "bootargs_defaults=setenv bootargs "
  •                 "console=${console} "
  •                 "${optargs}"
  •         "mmc_args=run bootargs_defaults;"
  •                 "setenv bootargs ${bootargs} "
  •                 "root=${mmc_root} "
  •                 "rootfstype=${mmc_root_fs_type} ip=${ip_method}"
  •         "nand_args=run bootargs_defaults;"
  •                 "setenv bootargs ${bootargs} "
  •                 "root=${nand_root} noinitrd "
  •                 "rootfstype=${nand_root_fs_type} ip=${ip_method}"
  •         "spi_args=run bootargs_defaults;"
  •                 "setenv bootargs ${bootargs} "
  •                 "root=${spi_root} "
  •                 "rootfstype=${spi_root_fs_type} ip=${ip_method}"
  •         "nor_args=run bootargs_defaults;"
  •                 "setenv bootargs ${bootargs} "
  •                 "root={nor_root} "
  •                 "rootfstype=${nor_root_fs_type} ip=${ip_method}"
  •         "net_args=run bootargs_defaults;"
  •                 "setenv bootargs ${bootargs} "
  •                 "root=/dev/nfs "
  •                 "nfsroot=${serverip}:${rootpath},${nfsopts} rw "
  •                 "ip=dhcp"
  •         "mmc_boot=run mmc_args; "
  •                 "run mmc_load_uimage; "
  •                 "bootm ${kloadaddr}"
  •         "nand_boot=echo Booting from nand ...; "
  •                 "run nand_args; "
  •                 "nandecc hw 2; "
  •                 "nand read.i ${kloadaddr} ${nand_src_addr} ${nand_img_siz}; "
  •                 "bootm ${kloadaddr}"
  •         "spi_boot=echo Booting from spi ...; "
  •                 "run spi_args; "
  •                 "sf probe ${spi_bus_no}:0; "
  •                 "sf read ${kloadaddr} ${spi_src_addr} ${spi_img_siz}; "
  •                 "bootm ${kloadaddr}"
  •         "nor_boot=echo Booting from NOR ...; "
  •                 "run nor_args; "
  •                 "cp.b ${0x08080000} ${kloadaddr} ${nor_img_siz}; "
  •                 "bootm ${kloadaddr}"
  •         "net_boot=echo Booting from network ...; "
  •                 "setenv autoload no; "
  •                 "dhcp; "
  •                 "tftp ${kloadaddr} ${bootfile}; "
  •                 "run net_args; "
  •                 "bootm ${kloadaddr}"

复制代码
"mmc_root_fs_type=ext3 rootwait"   改为"mmc_root_fs_type=ext4 rootwait"
大功告成！成功启动。






发送
 看不清?
0条回答

一周热门 更多>

相关文章