smdk6410.c: In function 'dram_init':
smdk6410.c:77:28: error: 'PHYS_SDRAM_SIZE' undeclared (first use in this function)
smdk6410.c:77:28: note: each undeclared identifier is reported only once for each function it appears in
make[1]: *** [smdk6410.o] Error 1
make[1]: Leaving directory `/home/zhaolei/linux/u-boot-mini6410/board/samsung/smdk6410'
make: *** [board/samsung/smdk6410/libsmdk6410.a] Error 2
请问这是怎么回事啊?我编译mini6410都可以的。请问mini6410和Tiny6410的u-boot可以通用吗?求大神指点下