SH4_WCR2
reg = _reg_read_4(SH4_WCR2);
_reg_write_4(SH4_WCR2, reg);
_reg_write_4(SH4_WCR2, BSC_WCR2_VAL);
_reg_write_4(SH4_WCR2, BSC_WCR2_VAL);
_reg_write_4(SH4_WCR2, 0xdd7845a7);
_reg_write_4(SH4_PCIWCR2, _reg_read_4(SH4_WCR2));