uboot下init_sequence_f函数之reserve_global_data

reserve_global_data:

static int reserve_global_data(void)
{
 gd->start_addr_sp -= sizeof(gd_t);
 gd->new_gd = (gd_t *)map_sysmem(gd->start_addr_sp, sizeof(gd_t));
 debug("Reserving %zu Bytes for Global Data at: %08lx\n",
   sizeof(gd_t), gd->start_addr_sp);
 return 0;
}