VGE_ISR
status = CSR_READ_4(sc, VGE_ISR);
CSR_WRITE_4(sc, VGE_ISR, status);
status = CSR_READ_4(sc, VGE_ISR);
CSR_WRITE_4(sc, VGE_ISR, status);
status = CSR_READ_4(sc, VGE_ISR);
CSR_WRITE_4(sc, VGE_ISR, status | VGE_ISR_HOLDOFF_RELOAD);
CSR_WRITE_4(sc, VGE_ISR, 0xFFFFFFFF);
CSR_WRITE_4(sc, VGE_ISR, 0xFFFFFFFF);
CSR_WRITE_4(sc, VGE_ISR, 0xFFFFFFFF);
CSR_WRITE_4(sc, VGE_ISR, 0xFFFFFFFF);
if (CSR_READ_4(sc, VGE_ISR) == 0)