d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

* Add some KTR messages for IPIs.

Browse Source 
* Don't call ast() from interrupt() - if we switch, then we will miss
  writing cr.eoi which will prevent the current cpu from receiving
  interrupts until the current thread is resumed. The call to ast()
  happens magically in exception_restore where it is safe.
* Add DDB 'show irq' command to examine interrupt hardware state.
This commit is contained in:
dfr 2002-03-14 10:24:00 +00:00
parent 7138bad96c
commit 2de0b2ebe2
1 changed files with 35 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
sys/ia64/ia64/interrupt.c
View File

@ -56,6 +56,7 @@
#include <machine/frame.h>
#include <machine/intr.h>
#include <machine/sapicvar.h>
#include <machine/smp.h>
#ifdef EVCNT_COUNTERS
struct evcnt clock_intr_evcnt; /* event counter for clock intrs. */
@ -69,7 +70,6 @@ struct evcnt clock_intr_evcnt; /* event counter for clock intrs. */
#endif
#ifdef SMP
extern int mp_ipi_vector[]; /* XXX */
extern int mp_ipi_test;
#endif
@ -123,13 +123,14 @@ interrupt(u_int64_t vector, struct trapframe *framep)
critical_exit();
#ifdef SMP
} else if (vector == mp_ipi_vector[IPI_AST]) {
if ((framep->tf_cr_ipsr & IA64_PSR_CPL) == IA64_PSR_CPL_USER)
ast(framep);
CTR1(KTR_SMP, "IPI_AST, cpuid=%d", PCPU_GET(cpuid));
} else if (vector == mp_ipi_vector[IPI_RENDEZVOUS]) {
CTR1(KTR_SMP, "IPI_RENDEZVOUS, cpuid=%d", PCPU_GET(cpuid));
smp_rendezvous_action();
} else if (vector == mp_ipi_vector[IPI_STOP]) {
u_int32_t mybit = PCPU_GET(cpumask);
CTR1(KTR_SMP, "IPI_STOP, cpuid=%d", PCPU_GET(cpuid));
savectx(PCPU_GET(pcb));
stopped_cpus |= mybit;
while ((started_cpus & mybit) == 0)
@ -142,6 +143,7 @@ interrupt(u_int64_t vector, struct trapframe *framep)
(*f)();
}
} else if (vector == mp_ipi_vector[IPI_TEST]) {
CTR1(KTR_SMP, "IPI_TEST, cpuid=%d", PCPU_GET(cpuid));
mp_ipi_test++;
#endif
} else
@ -331,3 +333,33 @@ ia64_dispatch_intr(void *frame, unsigned long vector)
KASSERT(error == 0, ("got an impossible stray interrupt"));
}
#ifdef DDB
static void
db_show_vector(int vector)
{
int irq, i;
irq = vector - IA64_HARDWARE_IRQ_BASE;
for (i = 0; i < ia64_sapic_count; i++) {
struct sapic *sa = ia64_sapics[i];
if (irq >= sa->sa_base && irq <= sa->sa_limit)
sapic_print(sa, irq - sa->sa_base);
}
}
DB_SHOW_COMMAND(irq, db_show_irq)
{
int vector;
if (have_addr) {
vector = ((addr >> 4) % 16) * 10 + (addr % 16);
db_show_vector(vector);
} else {
for (vector = IA64_HARDWARE_IRQ_BASE;
vector < IA64_HARDWARE_IRQ_BASE + 64; vector++)
db_show_vector(vector);
}
}
#endif