IMGU_REG_IRQCTRL_MASK
writel(0, base + IMGU_REG_IRQCTRL_MASK(IMGU_IRQCTRL_MAIN));
base + IMGU_REG_IRQCTRL_MASK(IMGU_IRQCTRL_MAIN));
writel(0, base + IMGU_REG_IRQCTRL_MASK(i));
writel(IMGU_IRQCTRL_IRQ_MASK, base + IMGU_REG_IRQCTRL_MASK(i));