static __inline__ int
apix_do_pending_hardint(struct cpu *cpu, struct regs *rp)
{
volatile uint16_t pending;
uint_t newipl, oldipl;
caddr_t newsp;
while ((pending = LOWLEVEL_PENDING(cpu)) != 0) {
newipl = bsrw_insn(pending);
ASSERT(newipl <= LOCK_LEVEL);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl || newipl <= cpu->cpu_base_spl)
return (-1);
/*
* Run this interrupt in a separate thread.
*/
newsp = apix_intr_thread_prolog(cpu, newipl, (caddr_t)rp);
ASSERT(newsp != NULL);
switch_sp_and_call(newsp, apix_dispatch_pending_hardint,
oldipl, 0);
}
return (0);
}
static __inline__ int
apix_do_pending_hilevel(struct cpu *cpu, struct regs *rp)
{
volatile uint16_t pending;
uint_t newipl, oldipl;
caddr_t newsp;
while ((pending = HILEVEL_PENDING(cpu)) != 0) {
newipl = bsrw_insn(pending);
ASSERT(newipl > LOCK_LEVEL && newipl > cpu->cpu_base_spl);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl)
return (-1);
/*
* High priority interrupts run on this cpu's interrupt stack.
*/
if (apix_hilevel_intr_prolog(cpu, newipl, oldipl, rp) == 0) {
newsp = cpu->cpu_intr_stack;
switch_sp_and_call(newsp, apix_dispatch_pending_hilevel,
newipl, 0);
} else { /* already on the interrupt stack */
apix_dispatch_pending_hilevel(newipl, 0);
}
(void) apix_hilevel_intr_epilog(cpu, oldipl);
}
return (0);
}
/*
* Deliver any softints the current interrupt priority allows.
* Called with interrupts disabled.
*/
void
dosoftint(struct regs *regs)
{
struct cpu *cpu = CPU;
int oldipl;
caddr_t newsp;
while (cpu->cpu_softinfo.st_pending) {
oldipl = cpu->cpu_pri;
newsp = dosoftint_prolog(cpu, (caddr_t)regs,
cpu->cpu_softinfo.st_pending, oldipl);
/*
* If returned stack pointer is NULL, priority is too high
* to run any of the pending softints now.
* Break out and they will be run later.
*/
if (newsp == NULL)
break;
switch_sp_and_call(newsp, dispatch_softint, oldipl, 0);
}
}
/*
* Deliver any softints the current interrupt priority allows.
* Called with interrupts disabled.
*/
int
apix_do_softint(struct regs *regs)
{
struct cpu *cpu = CPU;
int oldipl;
int newipl;
volatile uint16_t pending;
caddr_t newsp;
while ((pending = cpu->cpu_softinfo.st_pending) != 0) {
newipl = bsrw_insn(pending);
oldipl = cpu->cpu_pri;
if (newipl <= oldipl || newipl <= cpu->cpu_base_spl)
return (-1);
newsp = apix_do_softint_prolog(cpu, newipl, oldipl,
(caddr_t)regs);
ASSERT(newsp != NULL);
switch_sp_and_call(newsp, apix_dispatch_softint, oldipl, 0);
}
return (0);
}
/*
* Interrupt service routine, called with interrupts disabled.
*/
void
apix_do_interrupt(struct regs *rp, trap_trace_rec_t *ttp)
{
struct cpu *cpu = CPU;
int vector = rp->r_trapno, newipl, oldipl = cpu->cpu_pri, ret;
apix_vector_t *vecp = NULL;
#ifdef TRAPTRACE
ttp->ttr_marker = TT_INTERRUPT;
ttp->ttr_cpuid = cpu->cpu_id;
ttp->ttr_ipl = 0xff;
ttp->ttr_pri = (uchar_t)oldipl;
ttp->ttr_spl = cpu->cpu_base_spl;
ttp->ttr_vector = 0xff;
#endif /* TRAPTRACE */
cpu_idle_exit(CPU_IDLE_CB_FLAG_INTR);
++*(uint16_t *)&cpu->cpu_m.mcpu_istamp;
/*
* If it's a softint go do it now.
*/
if (rp->r_trapno == T_SOFTINT) {
/*
* It might be the case that when an interrupt is triggered,
* the spl is raised to high by splhigh(). Later when do_splx()
* is called to restore the spl, both hardware and software
* interrupt pending flags are check and an SOFTINT is faked
* accordingly.
*/
(void) apix_do_pending_hilevel(cpu, rp);
(void) apix_do_pending_hardint(cpu, rp);
(void) apix_do_softint(rp);
ASSERT(!interrupts_enabled());
#ifdef TRAPTRACE
ttp->ttr_vector = T_SOFTINT;
#endif
return;
}
/*
* Send EOI to local APIC
*/
newipl = (*setlvl)(oldipl, (int *)&rp->r_trapno);
#ifdef TRAPTRACE
ttp->ttr_ipl = (uchar_t)newipl;
#endif /* TRAPTRACE */
/*
* Bail if it is a spurious interrupt
*/
if (newipl == -1)
return;
vector = rp->r_trapno;
vecp = xv_vector(cpu->cpu_id, vector);
#ifdef TRAPTRACE
ttp->ttr_vector = (short)vector;
#endif /* TRAPTRACE */
/*
* Direct dispatch for IPI, MSI, MSI-X
*/
if (vecp && vecp->v_type != APIX_TYPE_FIXED &&
newipl > MAX(oldipl, cpu->cpu_base_spl)) {
caddr_t newsp;
if (newipl > LOCK_LEVEL) {
if (apix_hilevel_intr_prolog(cpu, newipl, oldipl, rp)
== 0) {
newsp = cpu->cpu_intr_stack;
switch_sp_and_call(newsp, apix_dispatch_hilevel,
vector, 0);
} else {
apix_dispatch_hilevel(vector, 0);
}
(void) apix_hilevel_intr_epilog(cpu, oldipl);
} else {
newsp = apix_intr_thread_prolog(cpu, newipl,
(caddr_t)rp);
switch_sp_and_call(newsp, apix_dispatch_lowlevel,
vector, oldipl);
}
} else {
/* Add to per-pil pending queue */
apix_add_pending_hardint(vector);
if (newipl <= MAX(oldipl, cpu->cpu_base_spl) ||
!apixs[cpu->cpu_id]->x_intr_pending)
return;
}
if (apix_do_pending_hilevel(cpu, rp) < 0)
return;
do {
ret = apix_do_pending_hardint(cpu, rp);
/*
* Deliver any pending soft interrupts.
*/
(void) apix_do_softint(rp);
} while (!ret && LOWLEVEL_PENDING(cpu));
}
/*ARGSUSED*/
void
do_interrupt(struct regs *rp, trap_trace_rec_t *ttp)
{
struct cpu *cpu = CPU;
int newipl, oldipl = cpu->cpu_pri;
uint_t vector;
caddr_t newsp;
#ifdef TRAPTRACE
ttp->ttr_marker = TT_INTERRUPT;
ttp->ttr_ipl = 0xff;
ttp->ttr_pri = oldipl;
ttp->ttr_spl = cpu->cpu_base_spl;
ttp->ttr_vector = 0xff;
#endif /* TRAPTRACE */
cpu_idle_exit(CPU_IDLE_CB_FLAG_INTR);
++*(uint16_t *)&cpu->cpu_m.mcpu_istamp;
/*
* If it's a softint go do it now.
*/
if (rp->r_trapno == T_SOFTINT) {
dosoftint(rp);
ASSERT(!interrupts_enabled());
return;
}
/*
* Raise the interrupt priority.
*/
newipl = (*setlvl)(oldipl, (int *)&rp->r_trapno);
#ifdef TRAPTRACE
ttp->ttr_ipl = newipl;
#endif /* TRAPTRACE */
/*
* Bail if it is a spurious interrupt
*/
if (newipl == -1)
return;
cpu->cpu_pri = newipl;
vector = rp->r_trapno;
#ifdef TRAPTRACE
ttp->ttr_vector = vector;
#endif /* TRAPTRACE */
if (newipl > LOCK_LEVEL) {
/*
* High priority interrupts run on this cpu's interrupt stack.
*/
if (hilevel_intr_prolog(cpu, newipl, oldipl, rp) == 0) {
newsp = cpu->cpu_intr_stack;
switch_sp_and_call(newsp, dispatch_hilevel, vector, 0);
} else { /* already on the interrupt stack */
dispatch_hilevel(vector, 0);
}
(void) hilevel_intr_epilog(cpu, newipl, oldipl, vector);
} else {
/*
* Run this interrupt in a separate thread.
*/
newsp = intr_thread_prolog(cpu, (caddr_t)rp, newipl);
switch_sp_and_call(newsp, dispatch_hardint, vector, oldipl);
}
#if !defined(__xpv)
/*
* Deliver any pending soft interrupts.
*/
if (cpu->cpu_softinfo.st_pending)
dosoftint(rp);
#endif /* !__xpv */
}
