PCIE_FUNC0_IMAP1
bcmpax_write_4(sc, PCIE_FUNC0_IMAP1, iwin1_start | 1);
bcmpax_write_4(sc, PCIE_FUNC0_IMAP1, iwin1_start | uimin(megs, 128));
bcmpax_write_4(sc, PCIE_FUNC0_IMAP1, 0);
bcmpax_read_4(sc, PCIE_FUNC0_IMAP1),