Symbol: MEM_SIZE_4M_GTB
drivers/video/fbdev/aty/atyfb_base.c
2510
case MEM_SIZE_4M_GTB:
drivers/video/fbdev/aty/atyfb_base.c
2560
par->mem_cntl |= gtb_memsize ? MEM_SIZE_4M_GTB : MEM_SIZE_4M;