static ssize_t
store_intc_userimask(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long level;
level = simple_strtoul(buf, NULL, 10);
/*
*/
if (level >= intc_get_dfl_prio_level())
return -EINVAL;
__raw_writel(0xa5 << 24 | level << 4, uimask);
return count;
}
static ssize_t
store_intc_userimask(struct sysdev_class *cls,
struct sysdev_class_attribute *attr,
const char *buf, size_t count)
{
unsigned long level;
level = simple_strtoul(buf, NULL, 10);
/*
* Minimal acceptable IRQ levels are in the 2 - 16 range, but
* these are chomped so as to not interfere with normal IRQs.
*
* Level 1 is a special case on some CPUs in that it's not
* directly settable, but given that USERIMASK cuts off below a
* certain level, we don't care about this limitation here.
* Level 0 on the other hand equates to user masking disabled.
*
* We use the default priority level as a cut off so that only
* special case opt-in IRQs can be mangled.
*/
if (level >= intc_get_dfl_prio_level())
return -EINVAL;
__raw_writel(0xa5 << 24 | level << 4, uimask);
return count;
}
int register_intc_userimask(unsigned long addr)
{
if (unlikely(uimask))
return -EBUSY;
uimask = ioremap_nocache(addr, SZ_4K);
if (unlikely(!uimask))
return -ENOMEM;
pr_info("userimask support registered for levels 0 -> %d\n",
intc_get_dfl_prio_level() - 1);
return 0;
}
