PCIE_LINK_WIDTH_SPEED_CTRL
reg = HREAD4(sc, PCIE_LINK_WIDTH_SPEED_CTRL);
HWRITE4(sc, PCIE_LINK_WIDTH_SPEED_CTRL, reg);
reg = HREAD4(sc, PCIE_LINK_WIDTH_SPEED_CTRL);
HWRITE4(sc, PCIE_LINK_WIDTH_SPEED_CTRL, reg);
reg = HREAD4(sc, PCIE_LINK_WIDTH_SPEED_CTRL);
HWRITE4(sc, PCIE_LINK_WIDTH_SPEED_CTRL, reg);