[U-Boot-Users] MIPS question

For those who know a little about U-Boot on MIPS: in include/asm-mips/addrspace.h line 52, there is a

#define UNCACHED_SDRAM(a) PHYSADDR(a)

The question is: shouldn't we use KSEG1ADDR() instead of PHYSADDR()? If not, this means we have to actually map KUSEG ?

Vlad