PCIE_FUNC0_IMAP2
bcmpax_write_4(sc, PCIE_FUNC0_IMAP2, iwin2_start | 1);
bcmpax_write_4(sc, PCIE_FUNC0_IMAP2, iwin2_start | uimin(megs - 128, 128));
bcmpax_write_4(sc, PCIE_FUNC0_IMAP2, 0);
bcmpax_read_4(sc, PCIE_FUNC0_IMAP2),