IOSAPIC_REG_WINDOW
return readl(iosapic + IOSAPIC_REG_WINDOW);
writel(val, iosapic + IOSAPIC_REG_WINDOW);
dp0 = readl(isp->addr+IOSAPIC_REG_WINDOW);
dp1 = readl(isp->addr+IOSAPIC_REG_WINDOW);