INTERRUPT_CNTL2
WREG32(INTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
WREG32(INTERRUPT_CNTL2, rdev->dummy_page.addr >> 8);
WREG32(INTERRUPT_CNTL2, rdev->dummy_page.addr >> 8);
WREG32(INTERRUPT_CNTL2, rdev->dummy_page.addr >> 8);