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/*-
* Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Berkeley Software Design Inc's name may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from BSDI: locore.s,v 1.36.2.15 1999/08/23 22:34:41 cp Exp
*/
/*-
* Copyright (c) 2002 Jake Burkholder.
* Copyright (c) 2007 - 2010 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/sparc64/mp_machdep.c 224681 2011-08-06 17:45:11Z marius $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/smp.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <vm/vm_map.h>
#include <dev/ofw/openfirm.h>
#include <machine/asi.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <machine/metadata.h>
#include <machine/ofw_machdep.h>
#include <machine/pcb.h>
#include <machine/smp.h>
#include <machine/tick.h>
#include <machine/tlb.h>
#include <machine/tsb.h>
#include <machine/tte.h>
#include <machine/ver.h>
#define SUNW_STARTCPU "SUNW,start-cpu"
#define SUNW_STOPSELF "SUNW,stop-self"
static ih_func_t cpu_ipi_ast;
static ih_func_t cpu_ipi_hardclock;
static ih_func_t cpu_ipi_preempt;
static ih_func_t cpu_ipi_stop;
/*
* Argument area used to pass data to non-boot processors as they start up.
* This must be statically initialized with a known invalid CPU module ID,
* since the other processors will use it before the boot CPU enters the
* kernel.
*/
struct cpu_start_args cpu_start_args = { 0, -1, -1, 0, 0, 0 };
struct ipi_cache_args ipi_cache_args;
struct ipi_rd_args ipi_rd_args;
struct ipi_tlb_args ipi_tlb_args;
struct pcb stoppcbs[MAXCPU];
struct mtx ipi_mtx;
cpu_ipi_selected_t *cpu_ipi_selected;
cpu_ipi_single_t *cpu_ipi_single;
static vm_offset_t mp_tramp;
static u_int cpuid_to_mid[MAXCPU];
static int isjbus;
static volatile cpuset_t shutdown_cpus;
static void ap_count(phandle_t node, u_int mid, u_int cpu_impl);
static void ap_start(phandle_t node, u_int mid, u_int cpu_impl);
static void cpu_mp_unleash(void *v);
static void foreach_ap(phandle_t node, void (*func)(phandle_t node,
u_int mid, u_int cpu_impl));
static void sun4u_startcpu(phandle_t cpu, void *func, u_long arg);
static cpu_ipi_selected_t cheetah_ipi_selected;
static cpu_ipi_single_t cheetah_ipi_single;
static cpu_ipi_selected_t jalapeno_ipi_selected;
static cpu_ipi_single_t jalapeno_ipi_single;
static cpu_ipi_selected_t spitfire_ipi_selected;
static cpu_ipi_single_t spitfire_ipi_single;
SYSINIT(cpu_mp_unleash, SI_SUB_SMP, SI_ORDER_FIRST, cpu_mp_unleash, NULL);
void
mp_init(u_int cpu_impl)
{
struct tte *tp;
int i;
mp_tramp = (vm_offset_t)OF_claim(NULL, PAGE_SIZE, PAGE_SIZE);
if (mp_tramp == (vm_offset_t)-1)
panic("%s", __func__);
bcopy(mp_tramp_code, (void *)mp_tramp, mp_tramp_code_len);
*(vm_offset_t *)(mp_tramp + mp_tramp_tlb_slots) = kernel_tlb_slots;
*(vm_offset_t *)(mp_tramp + mp_tramp_func) = (vm_offset_t)mp_startup;
tp = (struct tte *)(mp_tramp + mp_tramp_code_len);
for (i = 0; i < kernel_tlb_slots; i++) {
tp[i].tte_vpn = TV_VPN(kernel_tlbs[i].te_va, TS_4M);
tp[i].tte_data = TD_V | TD_4M | TD_PA(kernel_tlbs[i].te_pa) |
TD_L | TD_CP | TD_CV | TD_P | TD_W;
}
for (i = 0; i < PAGE_SIZE; i += sizeof(vm_offset_t))
flush(mp_tramp + i);
/*
* On UP systems cpu_ipi_selected() can be called while
* cpu_mp_start() wasn't so initialize these here.
*/
if (cpu_impl == CPU_IMPL_ULTRASPARCIIIi ||
cpu_impl == CPU_IMPL_ULTRASPARCIIIip) {
isjbus = 1;
cpu_ipi_selected = jalapeno_ipi_selected;
cpu_ipi_single = jalapeno_ipi_single;
} else if (cpu_impl == CPU_IMPL_SPARC64V ||
cpu_impl >= CPU_IMPL_ULTRASPARCIII) {
cpu_ipi_selected = cheetah_ipi_selected;
cpu_ipi_single = cheetah_ipi_single;
} else {
cpu_ipi_selected = spitfire_ipi_selected;
cpu_ipi_single = spitfire_ipi_single;
}
}
static void
foreach_ap(phandle_t node, void (*func)(phandle_t node, u_int mid,
u_int cpu_impl))
{
char type[sizeof("cpu")];
phandle_t child;
u_int cpuid;
uint32_t cpu_impl;
/* There's no need to traverse the whole OFW tree twice. */
if (mp_maxid > 0 && mp_ncpus >= mp_maxid + 1)
return;
for (; node != 0; node = OF_peer(node)) {
child = OF_child(node);
if (child > 0)
foreach_ap(child, func);
else {
if (OF_getprop(node, "device_type", type,
sizeof(type)) <= 0)
continue;
if (strcmp(type, "cpu") != 0)
continue;
if (OF_getprop(node, "implementation#", &cpu_impl,
sizeof(cpu_impl)) <= 0)
panic("%s: couldn't determine CPU "
"implementation", __func__);
if (OF_getprop(node, cpu_cpuid_prop(cpu_impl), &cpuid,
sizeof(cpuid)) <= 0)
panic("%s: couldn't determine CPU module ID",
__func__);
if (cpuid == PCPU_GET(mid))
continue;
(*func)(node, cpuid, cpu_impl);
}
}
}
/*
* Probe for other CPUs.
*/
void
cpu_mp_setmaxid()
{
CPU_SETOF(curcpu, &all_cpus);
mp_ncpus = 1;
mp_maxid = 0;
foreach_ap(OF_child(OF_peer(0)), ap_count);
}
static void
ap_count(phandle_t node __unused, u_int mid __unused, u_int cpu_impl __unused)
{
mp_maxid++;
}
int
cpu_mp_probe(void)
{
return (mp_maxid > 0);
}
struct cpu_group *
cpu_topo(void)
{
return (smp_topo_none());
}
static void
sun4u_startcpu(phandle_t cpu, void *func, u_long arg)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t cpu;
cell_t func;
cell_t arg;
} args = {
(cell_t)SUNW_STARTCPU,
3,
};
args.cpu = cpu;
args.func = (cell_t)func;
args.arg = (cell_t)arg;
ofw_entry(&args);
}
/*
* Fire up any non-boot processors.
*/
void
cpu_mp_start(void)
{
mtx_init(&ipi_mtx, "ipi", NULL, MTX_SPIN);
intr_setup(PIL_AST, cpu_ipi_ast, -1, NULL, NULL);
intr_setup(PIL_RENDEZVOUS, (ih_func_t *)smp_rendezvous_action,
-1, NULL, NULL);
intr_setup(PIL_STOP, cpu_ipi_stop, -1, NULL, NULL);
intr_setup(PIL_PREEMPT, cpu_ipi_preempt, -1, NULL, NULL);
intr_setup(PIL_HARDCLOCK, cpu_ipi_hardclock, -1, NULL, NULL);
cpuid_to_mid[curcpu] = PCPU_GET(mid);
foreach_ap(OF_child(OF_peer(0)), ap_start);
KASSERT(!isjbus || mp_ncpus <= IDR_JALAPENO_MAX_BN_PAIRS,
("%s: can only IPI a maximum of %d JBus-CPUs",
__func__, IDR_JALAPENO_MAX_BN_PAIRS));
smp_active = 1;
}
static void
ap_start(phandle_t node, u_int mid, u_int cpu_impl)
{
volatile struct cpu_start_args *csa;
struct pcpu *pc;
register_t s;
vm_offset_t va;
u_int cpuid;
uint32_t clock;
if (mp_ncpus > MAXCPU)
return;
if (OF_getprop(node, "clock-frequency", &clock, sizeof(clock)) <= 0)
panic("%s: couldn't determine CPU frequency", __func__);
if (clock != PCPU_GET(clock))
tick_et_use_stick = 1;
csa = &cpu_start_args;
csa->csa_state = 0;
sun4u_startcpu(node, (void *)mp_tramp, 0);
s = intr_disable();
while (csa->csa_state != CPU_TICKSYNC)
;
membar(StoreLoad);
csa->csa_tick = rd(tick);
if (cpu_impl == CPU_IMPL_SPARC64V ||
cpu_impl >= CPU_IMPL_ULTRASPARCIII) {
while (csa->csa_state != CPU_STICKSYNC)
;
membar(StoreLoad);
csa->csa_stick = rdstick();
}
while (csa->csa_state != CPU_INIT)
;
csa->csa_tick = csa->csa_stick = 0;
intr_restore(s);
cpuid = mp_ncpus++;
cpuid_to_mid[cpuid] = mid;
cpu_identify(csa->csa_ver, clock, cpuid);
va = kmem_alloc(kernel_map, PCPU_PAGES * PAGE_SIZE);
pc = (struct pcpu *)(va + (PCPU_PAGES * PAGE_SIZE)) - 1;
pcpu_init(pc, cpuid, sizeof(*pc));
dpcpu_init((void *)kmem_alloc(kernel_map, DPCPU_SIZE), cpuid);
pc->pc_addr = va;
pc->pc_clock = clock;
pc->pc_impl = cpu_impl;
pc->pc_mid = mid;
pc->pc_node = node;
cache_init(pc);
CPU_SET(cpuid, &all_cpus);
intr_add_cpu(cpuid);
}
void
cpu_mp_announce(void)
{
}
static void
cpu_mp_unleash(void *v)
{
volatile struct cpu_start_args *csa;
struct pcpu *pc;
register_t s;
vm_offset_t va;
vm_paddr_t pa;
u_int ctx_inc;
u_int ctx_min;
int i;
ctx_min = TLB_CTX_USER_MIN;
ctx_inc = (TLB_CTX_USER_MAX - 1) / mp_ncpus;
csa = &cpu_start_args;
csa->csa_count = mp_ncpus;
STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) {
pc->pc_tlb_ctx = ctx_min;
pc->pc_tlb_ctx_min = ctx_min;
pc->pc_tlb_ctx_max = ctx_min + ctx_inc;
ctx_min += ctx_inc;
if (pc->pc_cpuid == curcpu)
continue;
KASSERT(pc->pc_idlethread != NULL,
("%s: idlethread", __func__));
pc->pc_curthread = pc->pc_idlethread;
pc->pc_curpcb = pc->pc_curthread->td_pcb;
for (i = 0; i < PCPU_PAGES; i++) {
va = pc->pc_addr + i * PAGE_SIZE;
pa = pmap_kextract(va);
if (pa == 0)
panic("%s: pmap_kextract", __func__);
csa->csa_ttes[i].tte_vpn = TV_VPN(va, TS_8K);
csa->csa_ttes[i].tte_data = TD_V | TD_8K | TD_PA(pa) |
TD_L | TD_CP | TD_CV | TD_P | TD_W;
}
csa->csa_state = 0;
csa->csa_pcpu = pc->pc_addr;
csa->csa_mid = pc->pc_mid;
s = intr_disable();
while (csa->csa_state != CPU_BOOTSTRAP)
;
intr_restore(s);
}
membar(StoreLoad);
csa->csa_count = 0;
smp_started = 1;
}
void
cpu_mp_bootstrap(struct pcpu *pc)
{
volatile struct cpu_start_args *csa;
csa = &cpu_start_args;
/* Do CPU-specific initialization. */
if (pc->pc_impl >= CPU_IMPL_ULTRASPARCIII)
cheetah_init(pc->pc_impl);
else if (pc->pc_impl == CPU_IMPL_SPARC64V)
zeus_init(pc->pc_impl);
/*
* Enable the caches. Note that his may include applying workarounds.
*/
cache_enable(pc->pc_impl);
/*
* Clear (S)TICK timer(s) (including NPT) and ensure they are stopped.
*/
tick_clear(pc->pc_impl);
tick_stop(pc->pc_impl);
/* Set the kernel context. */
pmap_set_kctx();
/* Lock the kernel TSB in the TLB if necessary. */
if (tsb_kernel_ldd_phys == 0)
pmap_map_tsb();
/*
* Flush all non-locked TLB entries possibly left over by the
* firmware.
*/
tlb_flush_nonlocked();
/*
* Enable interrupts.
* Note that the PIL we be lowered indirectly via sched_throw(NULL)
* when fake spinlock held by the idle thread eventually is released.
*/
wrpr(pstate, 0, PSTATE_KERNEL);
smp_cpus++;
KASSERT(curthread != NULL, ("%s: curthread", __func__));
printf("SMP: AP CPU #%d Launched!\n", curcpu);
csa->csa_count--;
membar(StoreLoad);
csa->csa_state = CPU_BOOTSTRAP;
while (csa->csa_count != 0)
;
/* Start per-CPU event timers. */
cpu_initclocks_ap();
/* Ok, now enter the scheduler. */
sched_throw(NULL);
}
void
cpu_mp_shutdown(void)
{
cpuset_t cpus;
int i;
critical_enter();
shutdown_cpus = all_cpus;
CPU_CLR(PCPU_GET(cpuid), &shutdown_cpus);
cpus = shutdown_cpus;
/* XXX: Stop all the CPUs which aren't already. */
if (CPU_CMP(&stopped_cpus, &cpus)) {
/* cpus is just a flat "on" mask without curcpu. */
CPU_NAND(&cpus, &stopped_cpus);
stop_cpus(cpus);
}
i = 0;
while (!CPU_EMPTY(&shutdown_cpus)) {
if (i++ > 100000) {
printf("timeout shutting down CPUs.\n");
break;
}
}
critical_exit();
}
static void
cpu_ipi_ast(struct trapframe *tf)
{
}
static void
cpu_ipi_stop(struct trapframe *tf)
{
u_int cpuid;
CTR2(KTR_SMP, "%s: stopped %d", __func__, curcpu);
sched_pin();
savectx(&stoppcbs[curcpu]);
cpuid = PCPU_GET(cpuid);
CPU_SET_ATOMIC(cpuid, &stopped_cpus);
while (!CPU_ISSET(cpuid, &started_cpus)) {
if (CPU_ISSET(cpuid, &shutdown_cpus)) {
CPU_CLR_ATOMIC(cpuid, &shutdown_cpus);
(void)intr_disable();
for (;;)
;
}
}
CPU_CLR_ATOMIC(cpuid, &started_cpus);
CPU_CLR_ATOMIC(cpuid, &stopped_cpus);
sched_unpin();
CTR2(KTR_SMP, "%s: restarted %d", __func__, curcpu);
}
static void
cpu_ipi_preempt(struct trapframe *tf)
{
sched_preempt(curthread);
}
static void
cpu_ipi_hardclock(struct trapframe *tf)
{
struct trapframe *oldframe;
struct thread *td;
critical_enter();
td = curthread;
td->td_intr_nesting_level++;
oldframe = td->td_intr_frame;
td->td_intr_frame = tf;
hardclockintr();
td->td_intr_frame = oldframe;
td->td_intr_nesting_level--;
critical_exit();
}
static void
spitfire_ipi_selected(cpuset_t cpus, u_long d0, u_long d1, u_long d2)
{
u_int cpu;
while ((cpu = cpusetobj_ffs(&cpus)) != 0) {
cpu--;
CPU_CLR(cpu, &cpus);
spitfire_ipi_single(cpu, d0, d1, d2);
}
}
static void
spitfire_ipi_single(u_int cpu, u_long d0, u_long d1, u_long d2)
{
register_t s;
u_long ids;
u_int mid;
int i;
KASSERT(cpu != curcpu, ("%s: CPU can't IPI itself", __func__));
KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) & IDR_BUSY) == 0,
("%s: outstanding dispatch", __func__));
mid = cpuid_to_mid[cpu];
for (i = 0; i < IPI_RETRIES; i++) {
s = intr_disable();
stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
membar(Sync);
stxa(AA_INTR_SEND | (mid << IDC_ITID_SHIFT),
ASI_SDB_INTR_W, 0);
/*
* Workaround for SpitFire erratum #54; do a dummy read
* from a SDB internal register before the MEMBAR #Sync
* for the write to ASI_SDB_INTR_W (requiring another
* MEMBAR #Sync in order to make sure the write has
* occurred before the load).
*/
membar(Sync);
(void)ldxa(AA_SDB_CNTL_HIGH, ASI_SDB_CONTROL_R);
membar(Sync);
while (((ids = ldxa(0, ASI_INTR_DISPATCH_STATUS)) &
IDR_BUSY) != 0)
;
intr_restore(s);
if ((ids & (IDR_BUSY | IDR_NACK)) == 0)
return;
/*
* Leave interrupts enabled for a bit before retrying
* in order to avoid deadlocks if the other CPU is also
* trying to send an IPI.
*/
DELAY(2);
}
if (kdb_active != 0 || panicstr != NULL)
printf("%s: couldn't send IPI to module 0x%u\n",
__func__, mid);
else
panic("%s: couldn't send IPI to module 0x%u",
__func__, mid);
}
static void
cheetah_ipi_single(u_int cpu, u_long d0, u_long d1, u_long d2)
{
register_t s;
u_long ids;
u_int mid;
int i;
KASSERT(cpu != curcpu, ("%s: CPU can't IPI itself", __func__));
KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) &
IDR_CHEETAH_ALL_BUSY) == 0,
("%s: outstanding dispatch", __func__));
mid = cpuid_to_mid[cpu];
for (i = 0; i < IPI_RETRIES; i++) {
s = intr_disable();
stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
membar(Sync);
stxa(AA_INTR_SEND | (mid << IDC_ITID_SHIFT),
ASI_SDB_INTR_W, 0);
membar(Sync);
while (((ids = ldxa(0, ASI_INTR_DISPATCH_STATUS)) &
IDR_BUSY) != 0)
;
intr_restore(s);
if ((ids & (IDR_BUSY | IDR_NACK)) == 0)
return;
/*
* Leave interrupts enabled for a bit before retrying
* in order to avoid deadlocks if the other CPU is also
* trying to send an IPI.
*/
DELAY(2);
}
if (kdb_active != 0 || panicstr != NULL)
printf("%s: couldn't send IPI to module 0x%u\n",
__func__, mid);
else
panic("%s: couldn't send IPI to module 0x%u",
__func__, mid);
}
static void
cheetah_ipi_selected(cpuset_t cpus, u_long d0, u_long d1, u_long d2)
{
char pbuf[CPUSETBUFSIZ];
register_t s;
u_long ids;
u_int bnp;
u_int cpu;
int i;
KASSERT(!CPU_ISSET(curcpu, &cpus), ("%s: CPU can't IPI itself",
__func__));
KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) &
IDR_CHEETAH_ALL_BUSY) == 0,
("%s: outstanding dispatch", __func__));
if (CPU_EMPTY(&cpus))
return;
ids = 0;
for (i = 0; i < IPI_RETRIES * mp_ncpus; i++) {
s = intr_disable();
stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
membar(Sync);
bnp = 0;
for (cpu = 0; cpu < mp_ncpus; cpu++) {
if (CPU_ISSET(cpu, &cpus)) {
stxa(AA_INTR_SEND | (cpuid_to_mid[cpu] <<
IDC_ITID_SHIFT) | bnp << IDC_BN_SHIFT,
ASI_SDB_INTR_W, 0);
membar(Sync);
bnp++;
if (bnp == IDR_CHEETAH_MAX_BN_PAIRS)
break;
}
}
while (((ids = ldxa(0, ASI_INTR_DISPATCH_STATUS)) &
IDR_CHEETAH_ALL_BUSY) != 0)
;
intr_restore(s);
bnp = 0;
for (cpu = 0; cpu < mp_ncpus; cpu++) {
if (CPU_ISSET(cpu, &cpus)) {
if ((ids & (IDR_NACK << (2 * bnp))) == 0)
CPU_CLR(cpu, &cpus);
bnp++;
}
}
if (CPU_EMPTY(&cpus))
return;
/*
* Leave interrupts enabled for a bit before retrying
* in order to avoid deadlocks if the other CPUs are
* also trying to send IPIs.
*/
DELAY(2 * mp_ncpus);
}
if (kdb_active != 0 || panicstr != NULL)
printf("%s: couldn't send IPI (cpus=%s ids=0x%lu)\n",
__func__, cpusetobj_strprint(pbuf, &cpus), ids);
else
panic("%s: couldn't send IPI (cpus=%s ids=0x%lu)",
__func__, cpusetobj_strprint(pbuf, &cpus), ids);
}
static void
jalapeno_ipi_single(u_int cpu, u_long d0, u_long d1, u_long d2)
{
register_t s;
u_long ids;
u_int busy, busynack, mid;
int i;
KASSERT(cpu != curcpu, ("%s: CPU can't IPI itself", __func__));
KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) &
IDR_CHEETAH_ALL_BUSY) == 0,
("%s: outstanding dispatch", __func__));
mid = cpuid_to_mid[cpu];
busy = IDR_BUSY << (2 * mid);
busynack = (IDR_BUSY | IDR_NACK) << (2 * mid);
for (i = 0; i < IPI_RETRIES; i++) {
s = intr_disable();
stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
membar(Sync);
stxa(AA_INTR_SEND | (mid << IDC_ITID_SHIFT),
ASI_SDB_INTR_W, 0);
membar(Sync);
while (((ids = ldxa(0, ASI_INTR_DISPATCH_STATUS)) &
busy) != 0)
;
intr_restore(s);
if ((ids & busynack) == 0)
return;
/*
* Leave interrupts enabled for a bit before retrying
* in order to avoid deadlocks if the other CPU is also
* trying to send an IPI.
*/
DELAY(2);
}
if (kdb_active != 0 || panicstr != NULL)
printf("%s: couldn't send IPI to module 0x%u\n",
__func__, mid);
else
panic("%s: couldn't send IPI to module 0x%u",
__func__, mid);
}
static void
jalapeno_ipi_selected(cpuset_t cpus, u_long d0, u_long d1, u_long d2)
{
char pbuf[CPUSETBUFSIZ];
register_t s;
u_long ids;
u_int cpu;
int i;
KASSERT(!CPU_ISSET(curcpu, &cpus), ("%s: CPU can't IPI itself",
__func__));
KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) &
IDR_CHEETAH_ALL_BUSY) == 0,
("%s: outstanding dispatch", __func__));
if (CPU_EMPTY(&cpus))
return;
ids = 0;
for (i = 0; i < IPI_RETRIES * mp_ncpus; i++) {
s = intr_disable();
stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
membar(Sync);
for (cpu = 0; cpu < mp_ncpus; cpu++) {
if (CPU_ISSET(cpu, &cpus)) {
stxa(AA_INTR_SEND | (cpuid_to_mid[cpu] <<
IDC_ITID_SHIFT), ASI_SDB_INTR_W, 0);
membar(Sync);
}
}
while (((ids = ldxa(0, ASI_INTR_DISPATCH_STATUS)) &
IDR_CHEETAH_ALL_BUSY) != 0)
;
intr_restore(s);
if ((ids &
(IDR_CHEETAH_ALL_BUSY | IDR_CHEETAH_ALL_NACK)) == 0)
return;
for (cpu = 0; cpu < mp_ncpus; cpu++)
if (CPU_ISSET(cpu, &cpus))
if ((ids & (IDR_NACK <<
(2 * cpuid_to_mid[cpu]))) == 0)
CPU_CLR(cpu, &cpus);
/*
* Leave interrupts enabled for a bit before retrying
* in order to avoid deadlocks if the other CPUs are
* also trying to send IPIs.
*/
DELAY(2 * mp_ncpus);
}
if (kdb_active != 0 || panicstr != NULL)
printf("%s: couldn't send IPI (cpus=%s ids=0x%lu)\n",
__func__, cpusetobj_strprint(pbuf, &cpus), ids);
else
panic("%s: couldn't send IPI (cpus=%s ids=0x%lu)",
__func__, cpusetobj_strprint(pbuf, &cpus), ids);
}