SH4_BCR2
r16 = _reg_read_2(SH4_BCR2);
_reg_write_2(SH4_BCR2, r16);
_reg_write_2(SH4_BCR2, BSC_BCR2_VAL);
_reg_write_2(SH4_BCR2, 0x6af9);
if (_reg_read_2(SH4_BCR2) & BCR2_PORTEN)
_reg_write_4(SH4_PCIBCR2, _reg_read_2(SH4_BCR2));