UDELAY
if (AST_DRAMSTRUCT_IS(dram_reg_info, UDELAY)) {
if (AST_DRAMSTRUCT_IS(dram_reg_info, UDELAY)) {
AST_DRAMSTRUCT_INIT(UDELAY, _usecs)
UDELAY(map, chip, adr, usec)
UDELAY(map, chip, 0, 1);
UDELAY(map, chip, adr, 1);
UDELAY(map, chip, adr, 1);
UDELAY(map, chip, adr, 1000000/HZ);
UDELAY(map, chip, adr, 1000000/HZ);
UDELAY(map, chip, adr, 1);