/*
* Setup IPI handler to interrupt source.
*
* Note that there could be more ways how to send and receive IPIs
* on a platform like fast interrupts for example. In that case,
* one can call this function with ASIF_NOALLOC flag set and then
* call intr_ipi_dispatch() when appropriate.
*
* Not SMP coherent.
*/
int
intr_ipi_set_handler(u_int ipi, const char *name, intr_ipi_filter_t *filter,
void *arg, u_int flags)
{
struct intr_irqsrc *isrc;
int error;
if (filter == NULL)
return(EINVAL);
isrc = intr_ipi_lookup(ipi);
if (isrc->isrc_ipifilter != NULL)
return (EEXIST);
if ((flags & AISHF_NOALLOC) == 0) {
error = ipi_map(isrc, ipi);
if (error != 0)
return (error);
}
isrc->isrc_ipifilter = filter;
isrc->isrc_arg = arg;
isrc->isrc_handlers = 1;
isrc->isrc_count = intr_ipi_setup_counters(name);
isrc->isrc_index = 0; /* it should not be used in IPI case */
if (isrc->isrc_dev != NULL) {
PIC_ENABLE_INTR(isrc->isrc_dev, isrc);
PIC_ENABLE_SOURCE(isrc->isrc_dev, isrc);
}
return (0);
}
/*
* Send IPI thru interrupt controller.
*/
void
pic_ipi_send(cpuset_t cpus, u_int ipi)
{
struct intr_irqsrc *isrc;
isrc = intr_ipi_lookup(ipi);
KASSERT(intr_irq_root_dev != NULL, ("%s: no root attached", __func__));
PIC_IPI_SEND(intr_irq_root_dev, isrc, cpus);
}
void
intr_ipi_send(cpuset_t cpus, u_int ipi)
{
struct intr_ipi *ii;
ii = intr_ipi_lookup(ipi);
if (ii->ii_count == NULL)
panic("%s: not setup IPI %u", __func__, ipi);
ii->ii_send(ii->ii_send_arg, cpus, ipi);
}
void
intr_ipi_setup(u_int ipi, const char *name, intr_ipi_handler_t *hand,
void *h_arg, intr_ipi_send_t *send, void *s_arg)
{
struct intr_ipi *ii;
ii = intr_ipi_lookup(ipi);
KASSERT(hand != NULL, ("%s: ipi %u no handler", __func__, ipi));
KASSERT(send != NULL, ("%s: ipi %u no sender", __func__, ipi));
KASSERT(ii->ii_count == NULL, ("%s: ipi %u reused", __func__, ipi));
ii->ii_handler = hand;
ii->ii_handler_arg = h_arg;
ii->ii_send = send;
ii->ii_send_arg = s_arg;
strlcpy(ii->ii_name, name, INTR_IPI_NAMELEN);
ii->ii_count = intr_ipi_setup_counters(name);
}
void
intr_ipi_dispatch(u_int ipi, struct trapframe *tf)
{
void *arg;
struct intr_ipi *ii;
ii = intr_ipi_lookup(ipi);
if (ii->ii_count == NULL)
panic("%s: not setup IPI %u", __func__, ipi);
intr_ipi_increment_count(ii->ii_count, PCPU_GET(cpuid));
/*
* Supply ipi filter with trapframe argument
* if none is registered.
*/
arg = ii->ii_handler_arg != NULL ? ii->ii_handler_arg : tf;
ii->ii_handler(arg);
}
