SH4_BCR1
_reg_write_4(SH4_BCR1, BSC_BCR1_VAL);
_reg_write_4(SH4_BCR1, _reg_read_4(SH4_BCR1) | BCR1_BREQEN);
_reg_write_4(SH4_PCIBCR1, _reg_read_4(SH4_BCR1) | BCR1_MASTER);