BDC_BDCCFG0
sp_buff_size = BDC_SPB(bdc_readl(bdc->regs, BDC_BDCCFG0));
page_size = BDC_PGS(bdc_readl(bdc->regs, BDC_BDCCFG0));
temp = bdc_readl(bdc->regs, BDC_BDCCFG0);