FB_READ_EN
tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
WREG32(BIF_FB_EN, FB_READ_EN | FB_WRITE_EN);
WREG32(BIF_FB_EN, FB_READ_EN | FB_WRITE_EN);
WREG32(BIF_FB_EN, FB_READ_EN | FB_WRITE_EN);