BAR_HIGH_MASK
base = intel_ntb_reg_read(8, base_reg) & BAR_HIGH_MASK;
reg_val = intel_ntb_reg_read(8, xlat_reg) & BAR_HIGH_MASK;
reg_val = intel_ntb_reg_read(8, limit_reg) & BAR_HIGH_MASK;
base = intel_ntb_reg_read(4, base_reg) & BAR_HIGH_MASK;
reg_val = intel_ntb_reg_read(4, xlat_reg) & BAR_HIGH_MASK;
reg_val = intel_ntb_reg_read(4, limit_reg) & BAR_HIGH_MASK;
((val & BAR_HIGH_MASK) | ((val & BAR_LOW_MASK) >> BAR_LOW_SHIFT))