REG_IRQ_MASK
writel(REG_IRQ_PENDING_CMDR, master->regs + REG_IRQ_MASK);
irq_mask = readl(master->regs + REG_IRQ_MASK);
master->regs + REG_IRQ_MASK);
writel(irq_mask, master->regs + REG_IRQ_MASK);
writel(readl(master->regs + REG_IRQ_MASK) & ~REG_IRQ_PENDING_IBI,
master->regs + REG_IRQ_MASK);
writel(readl(master->regs + REG_IRQ_MASK) | REG_IRQ_PENDING_IBI,
master->regs + REG_IRQ_MASK);
writel(0x00, master->regs + REG_IRQ_MASK);
writel(REG_IRQ_PENDING_CMDR, master->regs + REG_IRQ_MASK);
writel(0x00, master->regs + REG_IRQ_MASK);