ZTEXTADDR

[zhaobin xv]

hi
   I see some blogs aboot ZTEXTADDR
in linux 2.4.18 :
in kernel/arch/arm/boot/Makefile：
 ifeq ($(CONFIG_ARCH_S3C2410),y)
ZTEXTADDR = 0x30008000
ZRELADDR = 0x30008000
endif
but
in linux 2.6. :
in kernel/arch/arm/boot/Makefile:
ZTEXTADDR = 0


I want to know why to change?
ZTEXTADDR is link addr or phs addr?