• Kim Phillips's avatar
    common: add a grepenv command · a000b795
    Kim Phillips authored and Wolfgang Denk's avatar Wolfgang Denk committed
    
    
    u-boot environments, esp. when boards are shared across multiple
    users, can get pretty large and time consuming to visually parse.
    The grepenv command this patch adds can be used in lieu of printenv
    to facilitate searching.  grepenv works like printenv but limits
    its output only to environment strings (variable name and value
    pairs) that match the user specified substring.
    
    the following examples are on a board with a 5313 byte environment
    that spans multiple screen pages:
    
    Example 1:  summarize ethernet configuration:
    
    => grepenv eth TSEC
    etact=FM1@DTSEC2
    eth=FM1@DTSEC4
    ethact=FM1@DTSEC2
    eth1addr=00:E0:0C:00:8b:01
    eth2addr=00:E0:0C:00:8b:02
    eth3addr=00:E0:0C:00:8b:03
    eth4addr=00:E0:0C:00:8b:04
    eth5addr=00:E0:0C:00:8b:05
    eth6addr=00:E0:0C:00:8b:06
    eth7addr=00:E0:0C:00:8b:07
    eth8addr=00:E0:0C:00:8b:08
    eth9addr=00:E0:0C:00:8b:09
    ethaddr=00:E0:0C:00:8b:00
    netdev=eth0
    uprcw=setenv ethact $eth;setenv filename p4080ds/R_PPSXX_0xe/rcw_0xe_2sgmii_rev2_high.bin;setenv start 0xe8000000;protect off all;run upimage;protect on all
    upuboot=setenv ethact $eth;setenv filename u-boot.bin;setenv start eff80000;protect off all;run upimage;protect on all
    upucode=setenv ethact $eth;setenv filename fsl_fman_ucode_P4080_101_6.bin;setenv start 0xef000000;protect off all;run upimage;protect on all
    usdboot=setenv ethact $eth;tftp 1000000 $dir/$bootfile;tftp 2000000 $dir/initramfs.cpio.gz.uboot;tftp c00000 $dir/p4080ds-usdpaa.dtb;setenv bootargs root=/dev/ram rw console=ttyS0,115200 $othbootargs;bootm 1000000 2000000 c00000;
    =>
    
    Example 2: detect unused env vars:
    
    => grepenv etact
    etact=FM1@DTSEC2
    =>
    
    Example 3: reveal hardcoded variables; e.g., for fdtaddr:
    
    => grepenv fdtaddr
    fdtaddr=c00000
    nfsboot=setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off console=$consoledev,$baudrate $othbootargs;tftp $loadaddr $bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr - $fdtaddr
    ramboot=setenv bootargs root=/dev/ram rw console=$consoledev,$baudrate $othbootargs;tftp $ramdiskaddr $ramdiskfile;tftp $loadaddr $bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr $ramdiskaddr $fdtaddr
    => grep $fdtaddr
    fdtaddr=c00000
    my_boot=bootm 0x40000000 0x41000000 0x00c00000
    my_dtb=tftp 0x00c00000 $prefix/p4080ds.dtb
    nohvboot=tftp 1000000 $dir/$bootfile;tftp 2000000 $dir/$ramdiskfile;tftp c00000 $dir/$fdtfile;setenv bootargs root=/dev/ram rw ramdisk_size=0x10000000 console=ttyS0,115200;bootm 1000000 2000000 c00000;
    =>
    
    This patch also enables the grepenv command by default on
    corenet_ds based boards (and repositions the DHCP command
    entry to keep the list sorted).
    Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
    Cc: Kumar Gala <kumar.gala@freescale.com>
    Cc: Andy Fleming <afleming@freescale.com>
    a000b795