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o Send a test IPI from the BSP to itself at the same time APs

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are woken up.
o  Make IPIs synchronuous by default. If we want asynchronuous
   IPIs, we may want to make the memory fence controllable.
This commit is contained in:
Marcel Moolenaar 2001-10-29 07:34:48 +00:00
parent b1ef773d12
commit 256e103fcf
2 changed files with 14 additions and 10 deletions
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9
sys/ia64/ia64/interrupt.c
View File

@ -55,6 +55,7 @@
#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. */
@ -67,6 +68,9 @@ struct evcnt clock_intr_evcnt; /* event counter for clock intrs. */
#include <ddb/ddb.h>
#endif
extern int mp_ipi_vector[]; /* XXX */
extern int mp_ipi_test;
volatile int mc_expected, mc_received;
static void
@ -113,9 +117,10 @@ interrupt(u_int64_t vector, struct trapframe *framep)
/* divide hz (1024) by 8 to get stathz (128) */
if((++schedclk2 & 0x7) == 0)
statclock((struct clockframe *)framep);
} else {
} else if (vector == mp_ipi_vector[IPI_TEST]) {
mp_ipi_test++;
} else
ia64_dispatch_intr(framep, vector);
}
out:
atomic_subtract_int(&td->td_intr_nesting_level, 1);

15
sys/ia64/ia64/mp_machdep.c
View File

@ -69,6 +69,7 @@ struct mp_cpu {
int mp_hardware = 0;
int mp_ipi_vector[IPI_COUNT];
int mp_ipi_test;
TAILQ_HEAD(, mp_cpu) ia64_cpus = TAILQ_HEAD_INITIALIZER(ia64_cpus);
@ -158,6 +159,9 @@ cpu_mp_start()
if (bootverbose)
printf("SMP: waking up CPU%d\n", cpu->cpu_no);
ipi_send(cpu->cpu_lid, IPI_AP_WAKEUP);
} else {
mp_ipi_test = 0;
ipi_self(IPI_TEST);
}
}
}
@ -165,18 +169,12 @@ cpu_mp_start()
static void
cpu_mp_unleash(void *dummy)
{
struct mp_cpu *cpu;
int awake = 0;
if (!mp_hardware)
return;
TAILQ_FOREACH(cpu, &ia64_cpus, cpu_next) {
if (cpu->cpu_awake)
awake++;
}
printf("SMP: %d CPUs, %d awake\n", mp_ncpus, awake);
if (mp_ipi_test != 1)
printf("SMP: sending of a test IPI to BSP failed\n");
}
/*
@ -246,6 +244,7 @@ ipi_send(u_int64_t lid, int ipi)
((lid >> 12) & 0xFFFF0L));
vector = (u_int64_t)(mp_ipi_vector[ipi] & 0xff);
*pipi = vector;
ia64_mf_a();
}
SYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, cpu_mp_unleash, NULL);