1The config option CONFIG_SILENT_CONSOLE can be used to quiet messages 2on the console. If the option has been enabled, the output can be 3silenced by setting the environment variable "silent". The variable 4is latched into the global data at an early stage in the boot process 5so deleting it with "setenv" will not take effect until the system is 6restarted. 7 8The following actions are taken if "silent" is set at boot time: 9 10 - Until the console devices have been initialized, output has to be 11 suppressed by testing for the flag "GD_FLG_SILENT" in "gd->flags". 12 Currently only the messages for the TRAB board are handled in this 13 way. 14 15 - When the console devices have been initialized, "stdout" and 16 "stderr" are set to "nulldev", so subsequent messages are 17 suppressed automatically. Make sure to enable "nulldev" by 18 #defining CFG_DEVICE_NULLDEV in your board config file. 19 20 - When booting a linux kernel, the "bootargs" are fixed up so that 21 the argument "console=" will be in the command line, no matter how 22 it was set in "bootargs" before. 23