SCU
SCU->sys_mask = SCU_SYS_SOFT;
SCU->vme_mask = SCU_MFP | SCU_SCC;
SCU->sys_mask |= SCU_IRQ7;
SCU->vme_mask |= SCU_SCC;
#define CLR_VME_INT (SCU->vme_int = 0)
#define SET_SOFT_INT (SCU->sys_int = 1)
#define CLR_SOFT_INT (SCU->sys_int = 0)
#define SET_VME_INT (SCU->vme_int = 1)
SCU->vme_mask |= 1 << va->va_irq;
SCU->vme_mask |= 1 << va->va_irq;