some question about serial.c

[xiangfu]

in serial.c file there use :
--S3C24X0_UART
--gd
--get_PCLK()
use :
[EMAIL PROTECTED]:~/cworkspace/u-boot$ find  -type f |xargs grep 
S3C24X0_UART
try to find where "S3C24X0_UART" declare. but i find nothing :-(

i want know where them declare.