/*ARGSUSED*/
static int
xen_uppc_addspl(int irqno, int ipl, int min_ipl, int max_ipl)
{
int ret = PSM_SUCCESS;
cpuset_t cpus;
if (irqno >= 0 && irqno <= MAX_ISA_IRQ)
atomic_add_16(&xen_uppc_irq_shared_table[irqno], 1);
/*
* We are called at splhi() so we can't call anything that might end
* up trying to context switch.
*/
if (irqno >= PIRQ_BASE && irqno < NR_PIRQS &&
DOMAIN_IS_INITDOMAIN(xen_info)) {
CPUSET_ZERO(cpus);
CPUSET_ADD(cpus, 0);
ec_setup_pirq(irqno, ipl, &cpus);
} else {
/*
* Set priority/affinity/enable for non PIRQs
*/
ret = ec_set_irq_priority(irqno, ipl);
ASSERT(ret == 0);
CPUSET_ZERO(cpus);
CPUSET_ADD(cpus, 0);
ec_set_irq_affinity(irqno, cpus);
ec_enable_irq(irqno);
}
return (ret);
}
void
cpu_hatch(void)
{
char *v = (char*)CPUINFO_VA;
int i;
for (i = 0; i < 4*PAGE_SIZE; i += sizeof(long))
flush(v + i);
cpu_pmap_init(curcpu());
CPUSET_ADD(cpus_active, cpu_number());
cpu_reset_fpustate();
curlwp = curcpu()->ci_data.cpu_idlelwp;
membar_Sync();
/* wait for the boot CPU to flip the switch */
while (sync_tick == 0) {
/* we do nothing here */
}
settick(0);
if (curcpu()->ci_system_clockrate[0] != 0) {
setstick(0);
stickintr_establish(PIL_CLOCK, stickintr);
} else {
tickintr_establish(PIL_CLOCK, tickintr);
}
spl0();
}
static int
poweron_vcpu(struct cpu *cp)
{
int error;
ASSERT(MUTEX_HELD(&cpu_lock));
if (HYPERVISOR_vcpu_op(VCPUOP_is_up, cp->cpu_id, NULL) != 0) {
printf("poweron_vcpu: vcpu%d is not available!\n",
cp->cpu_id);
return (ENXIO);
}
if ((error = xen_vcpu_up(cp->cpu_id)) == 0) {
CPUSET_ADD(cpu_ready_set, cp->cpu_id);
cp->cpu_flags |= CPU_EXISTS | CPU_READY | CPU_RUNNING;
cp->cpu_flags &= ~CPU_POWEROFF;
/*
* There are some nasty races possible here.
* Tell the vcpu it's up one more time.
* XXPV Is this enough? Is this safe?
*/
(void) xen_vcpu_up(cp->cpu_id);
cpu_phase[cp->cpu_id] = CPU_PHASE_NONE;
cpu_set_state(cp);
}
return (error);
}
/*
* Internal cpu startup sequencer
* The sequence is as follows:
*
* MASTER SLAVE
* ------- ----------
* assume the kernel data is initialized
* clear the proxy bit
* start the slave cpu
* wait for the slave cpu to set the proxy
*
* the slave runs slave_startup and then sets the proxy
* the slave waits for the master to add slave to the ready set
*
* the master finishes the initialization and
* adds the slave to the ready set
*
* the slave exits the startup thread and is running
*/
void
start_cpu(int cpuid, void(*flag_func)(int))
{
extern void cpu_startup(int);
int timout;
ASSERT(MUTEX_HELD(&cpu_lock));
/*
* Before we begin the dance, tell DTrace that we're about to start
* a CPU.
*/
if (dtrace_cpustart_init != NULL)
(*dtrace_cpustart_init)();
/* start the slave cpu */
CPUSET_DEL(proxy_ready_set, cpuid);
if (prom_test("SUNW,start-cpu-by-cpuid") == 0) {
(void) prom_startcpu_bycpuid(cpuid, (caddr_t)&cpu_startup,
cpuid);
} else {
/* "by-cpuid" interface didn't exist. Do it the old way */
pnode_t nodeid = cpunodes[cpuid].nodeid;
ASSERT(nodeid != (pnode_t)0);
(void) prom_startcpu(nodeid, (caddr_t)&cpu_startup, cpuid);
}
/* wait for the slave cpu to check in. */
for (timout = CPU_WAKEUP_GRACE_MSEC; timout; timout--) {
if (CPU_IN_SET(proxy_ready_set, cpuid))
break;
DELAY(1000);
}
if (timout == 0) {
panic("cpu%d failed to start (2)", cpuid);
}
/*
* The slave has started; we can tell DTrace that it's safe again.
*/
if (dtrace_cpustart_fini != NULL)
(*dtrace_cpustart_fini)();
/* run the master side of stick synchronization for the slave cpu */
sticksync_master();
/*
* deal with the cpu flags in a phase-specific manner
* for various reasons, this needs to run after the slave
* is checked in but before the slave is released.
*/
(*flag_func)(cpuid);
/* release the slave */
CPUSET_ADD(cpu_ready_set, cpuid);
}
/*
* common slave cpu initialization code
*/
void
common_startup_init(cpu_t *cp, int cpuid)
{
kthread_id_t tp;
sfmmu_t *sfmmup;
caddr_t sp;
/*
* Allocate and initialize the startup thread for this CPU.
*/
tp = thread_create(NULL, 0, slave_startup, NULL, 0, &p0,
TS_STOPPED, maxclsyspri);
/*
* Set state to TS_ONPROC since this thread will start running
* as soon as the CPU comes online.
*
* All the other fields of the thread structure are setup by
* thread_create().
*/
THREAD_ONPROC(tp, cp);
tp->t_preempt = 1;
tp->t_bound_cpu = cp;
tp->t_affinitycnt = 1;
tp->t_cpu = cp;
tp->t_disp_queue = cp->cpu_disp;
sfmmup = astosfmmu(&kas);
CPUSET_ADD(sfmmup->sfmmu_cpusran, cpuid);
/*
* Setup thread to start in slave_startup.
*/
sp = tp->t_stk;
tp->t_pc = (uintptr_t)slave_startup - 8;
tp->t_sp = (uintptr_t)((struct rwindow *)sp - 1) - STACK_BIAS;
cp->cpu_id = cpuid;
cp->cpu_self = cp;
cp->cpu_thread = tp;
cp->cpu_lwp = NULL;
cp->cpu_dispthread = tp;
cp->cpu_dispatch_pri = DISP_PRIO(tp);
cp->cpu_startup_thread = tp;
/*
* The dispatcher may discover the CPU before it is in cpu_ready_set
* and attempt to poke it. Before the CPU is in cpu_ready_set, any
* cross calls to it will be dropped. We initialize
* poke_cpu_outstanding to true so that poke_cpu will ignore any poke
* requests for this CPU. Pokes that come in before the CPU is in
* cpu_ready_set can be ignored because the CPU is about to come
* online.
*/
cp->cpu_m.poke_cpu_outstanding = B_TRUE;
}
/*
* Process cpu stop-self event.
* XXX could maybe add/use locoresw halt function?
*/
static void
ipi_halt(void)
{
const u_int my_cpu = cpu_number();
printf("cpu%u: shutting down\n", my_cpu);
CPUSET_ADD(cpus_halted, my_cpu);
splhigh();
for (;;)
;
/* NOTREACHED */
}
/*
* Process cpu stop-self event.
*/
void
sparc64_ipi_halt_thiscpu(void *arg, void *arg2)
{
extern void prom_printf(const char *fmt, ...);
printf("cpu%d: shutting down\n", cpu_number());
if (prom_has_stop_other() || !prom_has_stopself()) {
/*
* just loop here, the final cpu will stop us later
*/
CPUSET_ADD(cpus_spinning, cpu_number());
CPUSET_ADD(cpus_halted, cpu_number());
spl0();
while (1)
/* nothing */;
} else {
CPUSET_ADD(cpus_halted, cpu_number());
prom_stopself();
}
}
/*
* Ensure counters are enabled on the given processor.
*/
void
kcpc_remote_program(cpu_t *cp)
{
cpuset_t set;
CPUSET_ZERO(set);
CPUSET_ADD(set, cp->cpu_id);
xc_sync(0, 0, 0, CPUSET2BV(set), (xc_func_t)kcpc_remoteprogram_func);
}
/*
* Halt this cpu
*/
void
cpu_halt(void)
{
int index = cpu_index(curcpu());
printf("cpu%d: shutting down\n", index);
CPUSET_ADD(cpus_halted, index);
spl0(); /* allow interrupts e.g. further ipi ? */
for (;;) ; /* spin */
/* NOTREACHED */
}
/*
* Jump to the fast reboot switcher. This function never returns.
*/
void
fast_reboot()
{
processorid_t bootcpuid = 0;
extern uintptr_t postbootkernelbase;
extern char fb_swtch_image[];
fastboot_file_t *fb;
int i;
postbootkernelbase = 0;
fb = &newkernel.fi_files[FASTBOOT_SWTCH];
/*
* Map the address into both the current proc's address
* space and the kernel's address space in case the panic
* is forced by kmdb.
*/
if (&kas != curproc->p_as) {
hat_devload(curproc->p_as->a_hat, (caddr_t)fb->fb_va,
MMU_PAGESIZE, mmu_btop(fb->fb_dest_pa),
PROT_READ | PROT_WRITE | PROT_EXEC,
HAT_LOAD_NOCONSIST | HAT_LOAD_LOCK);
}
bcopy((void *)fb_swtch_image, (void *)fb->fb_va, fb->fb_size);
/*
* Set fb_va to fake_va
*/
for (i = 0; i < FASTBOOT_MAX_FILES_MAP; i++) {
newkernel.fi_files[i].fb_va = fake_va;
}
if (panicstr && CPU->cpu_id != bootcpuid &&
CPU_ACTIVE(cpu_get(bootcpuid))) {
extern void panic_idle(void);
cpuset_t cpuset;
CPUSET_ZERO(cpuset);
CPUSET_ADD(cpuset, bootcpuid);
xc_priority((xc_arg_t)&newkernel, 0, 0, CPUSET2BV(cpuset),
(xc_func_t)fastboot_xc_func);
panic_idle();
} else
(void) fastboot_xc_func(&newkernel, 0, 0);
}
void
sparc64_do_pause(void)
{
#if defined(DDB)
extern bool ddb_running_on_this_cpu(void);
extern void db_resume_others(void);
#endif
CPUSET_ADD(cpus_paused, cpu_number());
do {
membar_Sync();
} while(CPUSET_HAS(cpus_paused, cpu_number()));
membar_Sync();
CPUSET_ADD(cpus_resumed, cpu_number());
#if defined(DDB)
if (ddb_running_on_this_cpu()) {
db_command_loop();
db_resume_others();
}
#endif
}
/*
* Pause this cpu
*/
void
cpu_pause(struct reg *regsp)
{
int s = splhigh();
int index = cpu_index(curcpu());
for (;;) {
CPUSET_ADD(cpus_paused, index);
do {
;
} while (CPUSET_HAS_P(cpus_paused, index));
CPUSET_ADD(cpus_resumed, index);
#if defined(DDB)
if (ddb_running_on_this_cpu_p())
cpu_Debugger();
if (ddb_running_on_any_cpu_p())
continue;
#endif
break;
}
splx(s);
}
void
cpu_hatch()
{
char *v = (char*)CPUINFO_VA;
int i;
for (i = 0; i < 4*PAGE_SIZE; i += sizeof(long))
flush(v + i);
cpu_pmap_init(curcpu());
CPUSET_ADD(cpus_active, cpu_number());
cpu_reset_fpustate();
curlwp = curcpu()->ci_data.cpu_idlelwp;
membar_sync();
tickintr_establish(PIL_CLOCK, tickintr);
spl0();
}
void
cpu_boot_secondary_processors(void)
{
for (struct cpu_info *ci = cpu_info_store.ci_next;
ci != NULL;
ci = ci->ci_next) {
KASSERT(!CPU_IS_PRIMARY(ci));
KASSERT(ci->ci_data.cpu_idlelwp);
/*
* Skip this CPU if it didn't sucessfully hatch.
*/
if (! CPUSET_HAS_P(cpus_hatched, cpu_index(ci)))
continue;
ci->ci_data.cpu_cc_skew = mips3_cp0_count_read();
atomic_or_ulong(&ci->ci_flags, CPUF_RUNNING);
CPUSET_ADD(cpus_running, cpu_index(ci));
}
}
void
cpu_hatch(struct cpu_info *ci)
{
struct pmap_tlb_info * const ti = ci->ci_tlb_info;
/*
* Invalidate all the TLB enties (even wired ones) and then reserve
* space for the wired TLB entries.
*/
mips3_cp0_wired_write(0);
tlb_invalidate_all();
mips3_cp0_wired_write(ti->ti_wired);
/*
* Setup HWRENA and USERLOCAL COP0 registers (MIPSxxR2).
*/
cpu_hwrena_setup();
/*
* If we are using register zero relative addressing to access cpu_info
* in the exception vectors, enter that mapping into TLB now.
*/
if (ci->ci_tlb_slot >= 0) {
const uint32_t tlb_lo = MIPS3_PG_G|MIPS3_PG_V
| mips3_paddr_to_tlbpfn((vaddr_t)ci);
tlb_enter(ci->ci_tlb_slot, -PAGE_SIZE, tlb_lo);
}
/*
* Flush the icache just be sure.
*/
mips_icache_sync_all();
/*
* Let this CPU do its own initialization (for things that have to be
* done on the local CPU).
*/
(*mips_locoresw.lsw_cpu_init)(ci);
/*
* Announce we are hatched
*/
CPUSET_ADD(cpus_hatched, cpu_index(ci));
/*
* Now wait to be set free!
*/
while (! CPUSET_HAS_P(cpus_running, cpu_index(ci))) {
/* spin, spin, spin */
}
/*
* initialize the MIPS count/compare clock
*/
mips3_cp0_count_write(ci->ci_data.cpu_cc_skew);
KASSERT(ci->ci_cycles_per_hz != 0);
ci->ci_next_cp0_clk_intr = ci->ci_data.cpu_cc_skew + ci->ci_cycles_per_hz;
mips3_cp0_compare_write(ci->ci_next_cp0_clk_intr);
ci->ci_data.cpu_cc_skew = 0;
/*
* Let this CPU do its own post-running initialization
* (for things that have to be done on the local CPU).
*/
(*mips_locoresw.lsw_cpu_run)(ci);
/*
* Now turn on interrupts.
*/
spl0();
/*
* And do a tail call to idle_loop
*/
idle_loop(NULL);
}
/*
* Gets called when softcall queue is not moving forward. We choose
* a CPU and poke except the ones which are already poked.
*/
static int
softcall_choose_cpu()
{
cpu_t *cplist = CPU;
cpu_t *cp;
int intr_load = INT_MAX;
int cpuid = -1;
cpuset_t poke;
int s;
ASSERT(getpil() >= DISP_LEVEL);
ASSERT(ncpus > 1);
ASSERT(MUTEX_HELD(&softcall_lock));
CPUSET_ZERO(poke);
/*
* The hint is to start from current CPU.
*/
cp = cplist;
do {
/*
* Don't select this CPU if :
* - in cpuset already
* - CPU is not accepting interrupts
* - CPU is being offlined
*/
if (CPU_IN_SET(*softcall_cpuset, cp->cpu_id) ||
(cp->cpu_flags & CPU_ENABLE) == 0 ||
(cp == cpu_inmotion))
continue;
#if defined(__x86)
/*
* Don't select this CPU if a hypervisor indicates it
* isn't currently scheduled onto a physical cpu. We are
* looking for a cpu that can respond quickly and the time
* to get the virtual cpu scheduled and switched to running
* state is likely to be relatively lengthy.
*/
if (vcpu_on_pcpu(cp->cpu_id) == VCPU_NOT_ON_PCPU)
continue;
#endif /* __x86 */
/* if CPU is not busy */
if (cp->cpu_intrload == 0) {
cpuid = cp->cpu_id;
break;
}
if (cp->cpu_intrload < intr_load) {
cpuid = cp->cpu_id;
intr_load = cp->cpu_intrload;
} else if (cp->cpu_intrload == intr_load) {
/*
* We want to poke CPUs having similar
* load because we don't know which CPU is
* can acknowledge level1 interrupt. The
* list of such CPUs should not be large.
*/
if (cpuid != -1) {
/*
* Put the last CPU chosen because
* it also has same interrupt load.
*/
CPUSET_ADD(poke, cpuid);
cpuid = -1;
}
CPUSET_ADD(poke, cp->cpu_id);
}
} while ((cp = cp->cpu_next_onln) != cplist);
/* if we found a CPU which suits best to poke */
if (cpuid != -1) {
CPUSET_ZERO(poke);
CPUSET_ADD(poke, cpuid);
}
if (CPUSET_ISNULL(poke)) {
mutex_exit(&softcall_lock);
return (0);
}
/*
* We first set the bit in cpuset and then poke.
*/
CPUSET_XOR(*softcall_cpuset, poke);
mutex_exit(&softcall_lock);
/*
* If softcall() was called at low pil then we may
* get preempted before we raise PIL. It should be okay
* because we are just going to poke CPUs now or at most
* another thread may start choosing CPUs in this routine.
*/
s = splhigh();
siron_poke_cpu(poke);
splx(s);
return (1);
}
/*
* Gets called when softcall queue is not moving forward. We choose
* a CPU and poke except the ones which are already poked.
*/
static int
softcall_choose_cpu()
{
cpu_t *cplist = CPU;
cpu_t *cp;
int intr_load = INT_MAX;
int cpuid = -1;
cpuset_t poke;
int s;
ASSERT(getpil() >= DISP_LEVEL);
ASSERT(ncpus > 1);
ASSERT(MUTEX_HELD(&softcall_lock));
CPUSET_ZERO(poke);
/*
* The hint is to start from current CPU.
*/
cp = cplist;
do {
if (CPU_IN_SET(*softcall_cpuset, cp->cpu_id) ||
(cp->cpu_flags & CPU_ENABLE) == 0)
continue;
/* if CPU is not busy */
if (cp->cpu_intrload == 0) {
cpuid = cp->cpu_id;
break;
}
if (cp->cpu_intrload < intr_load) {
cpuid = cp->cpu_id;
intr_load = cp->cpu_intrload;
} else if (cp->cpu_intrload == intr_load) {
/*
* We want to poke CPUs having similar
* load because we don't know which CPU is
* can acknowledge level1 interrupt. The
* list of such CPUs should not be large.
*/
if (cpuid != -1) {
/*
* Put the last CPU chosen because
* it also has same interrupt load.
*/
CPUSET_ADD(poke, cpuid);
cpuid = -1;
}
CPUSET_ADD(poke, cp->cpu_id);
}
} while ((cp = cp->cpu_next_onln) != cplist);
/* if we found a CPU which suits best to poke */
if (cpuid != -1) {
CPUSET_ZERO(poke);
CPUSET_ADD(poke, cpuid);
}
if (CPUSET_ISNULL(poke)) {
mutex_exit(&softcall_lock);
return (0);
}
/*
* We first set the bit in cpuset and then poke.
*/
CPUSET_XOR(*softcall_cpuset, poke);
mutex_exit(&softcall_lock);
/*
* If softcall() was called at low pil then we may
* get preempted before we raise PIL. It should be okay
* because we are just going to poke CPUs now or at most
* another thread may start choosing CPUs in this routine.
*/
s = splhigh();
siron_poke_cpu(poke);
splx(s);
return (1);
}
void
softint(void)
{
softcall_t *sc = NULL;
void (*func)();
caddr_t arg;
int cpu_id = CPU->cpu_id;
mutex_enter(&softcall_lock);
if (softcall_state & (SOFT_STEAL|SOFT_PEND)) {
softcall_state = SOFT_DRAIN;
} else {
/*
* The check for softcall_cpuset being
* NULL is required because it may get
* called very early during boot.
*/
if (softcall_cpuset != NULL &&
CPU_IN_SET(*softcall_cpuset, cpu_id))
CPUSET_DEL(*softcall_cpuset, cpu_id);
mutex_exit(&softcall_lock);
goto out;
}
/*
* Setting softcall_latest_cpuid to current CPU ensures
* that there is only one active softlevel1 handler to
* process softcall queues.
*
* Since softcall_lock lock is dropped before calling
* func (callback), we need softcall_latest_cpuid
* to prevent two softlevel1 hanlders working on the
* queue when the first softlevel1 handler gets
* stuck due to high interrupt load.
*/
softcall_latest_cpuid = cpu_id;
/* add ourself to the cpuset */
if (!CPU_IN_SET(*softcall_cpuset, cpu_id))
CPUSET_ADD(*softcall_cpuset, cpu_id);
for (;;) {
softcall_tick = lbolt;
if ((sc = softhead) != NULL) {
func = sc->sc_func;
arg = sc->sc_arg;
softhead = sc->sc_next;
sc->sc_next = softfree;
softfree = sc;
}
if (sc == NULL) {
if (CPU_IN_SET(*softcall_cpuset, cpu_id))
CPUSET_DEL(*softcall_cpuset, cpu_id);
softcall_state = SOFT_IDLE;
ASSERT(softcall_latest_cpuid == cpu_id);
softcall_latest_cpuid = -1;
mutex_exit(&softcall_lock);
break;
}
mutex_exit(&softcall_lock);
func(arg);
mutex_enter(&softcall_lock);
/*
* No longer need softcall processing from current
* interrupt handler because either
* (a) softcall is in SOFT_IDLE state or
* (b) There is a CPU already draining softcall
* queue and the current softlevel1 is no
* longer required.
*/
if (softcall_latest_cpuid != cpu_id) {
if (CPU_IN_SET(*softcall_cpuset, cpu_id))
CPUSET_DEL(*softcall_cpuset, cpu_id);
mutex_exit(&softcall_lock);
break;
}
}
out:
if ((func = kdi_softcall_func) != NULL) {
kdi_softcall_func = NULL;
func();
}
}
/*
* Indicate that this core (cpuid) resides on the chip indicated by chipid.
* Called during boot and DR add.
*/
void
cmp_add_cpu(chipid_t chipid, processorid_t cpuid)
{
CPUSET_ADD(chips[chipid], cpuid);
}
/*
* launch slave cpus into kernel text, pause them,
* and restore the original prom pages
*/
void
i_cpr_mp_setup(void)
{
extern void restart_other_cpu(int);
cpu_t *cp;
uint64_t kctx = kcontextreg;
/*
* Do not allow setting page size codes in MMU primary context
* register while using cif wrapper. This is needed to work
* around OBP incorrect handling of this MMU register.
*/
kcontextreg = 0;
/*
* reset cpu_ready_set so x_calls work properly
*/
CPUSET_ZERO(cpu_ready_set);
CPUSET_ADD(cpu_ready_set, getprocessorid());
/*
* setup cif to use the cookie from the new/tmp prom
* and setup tmp handling for calling prom services.
*/
i_cpr_cif_setup(CIF_SPLICE);
/*
* at this point, only the nucleus and a few cpr pages are
* mapped in. once we switch to the kernel trap table,
* we can access the rest of kernel space.
*/
prom_set_traptable(&trap_table);
if (ncpus > 1) {
sfmmu_init_tsbs();
mutex_enter(&cpu_lock);
/*
* All of the slave cpus are not ready at this time,
* yet the cpu structures have various cpu_flags set;
* clear cpu_flags and mutex_ready.
* Since we are coming up from a CPU suspend, the slave cpus
* are frozen.
*/
for (cp = CPU->cpu_next; cp != CPU; cp = cp->cpu_next) {
cp->cpu_flags = CPU_FROZEN;
cp->cpu_m.mutex_ready = 0;
}
for (cp = CPU->cpu_next; cp != CPU; cp = cp->cpu_next)
restart_other_cpu(cp->cpu_id);
pause_cpus(NULL, NULL);
mutex_exit(&cpu_lock);
i_cpr_xcall(i_cpr_clear_entries);
} else
i_cpr_clear_entries(0, 0);
/*
* now unlink the cif wrapper; WARNING: do not call any
* prom_xxx() routines until after prom pages are restored.
*/
i_cpr_cif_setup(CIF_UNLINK);
(void) i_cpr_prom_pages(CPR_PROM_RESTORE);
/* allow setting page size codes in MMU primary context register */
kcontextreg = kctx;
}
/*ARGSUSED*/
void
start_other_cpus(int flag)
{
int cpuid;
extern void idlestop_init(void);
int bootcpu;
/*
* Check if cpu_bringup_set has been explicitly set before
* initializing it.
*/
if (CPUSET_ISNULL(cpu_bringup_set)) {
CPUSET_ALL(cpu_bringup_set);
}
if (&cpu_feature_init)
cpu_feature_init();
/*
* Initialize CPC.
*/
kcpc_hw_init();
mutex_enter(&cpu_lock);
/*
* Initialize our own cpu_info.
*/
init_cpu_info(CPU);
/*
* Initialize CPU 0 cpu module private data area, including scrubber.
*/
cpu_init_private(CPU);
populate_idstr(CPU);
/*
* perform such initialization as is needed
* to be able to take CPUs on- and off-line.
*/
cpu_pause_init();
xc_init(); /* initialize processor crosscalls */
idlestop_init();
if (!use_mp) {
mutex_exit(&cpu_lock);
cmn_err(CE_CONT, "?***** Not in MP mode\n");
return;
}
/*
* should we be initializing this cpu?
*/
bootcpu = getprocessorid();
/*
* launch all the slave cpus now
*/
for (cpuid = 0; cpuid < NCPU; cpuid++) {
pnode_t nodeid = cpunodes[cpuid].nodeid;
if (nodeid == (pnode_t)0)
continue;
if (cpuid == bootcpu) {
if (!CPU_IN_SET(cpu_bringup_set, cpuid)) {
cmn_err(CE_WARN, "boot cpu not a member "
"of cpu_bringup_set, adding it");
CPUSET_ADD(cpu_bringup_set, cpuid);
}
continue;
}
if (!CPU_IN_SET(cpu_bringup_set, cpuid))
continue;
ASSERT(cpu[cpuid] == NULL);
if (setup_cpu_common(cpuid)) {
cmn_err(CE_PANIC, "cpu%d: setup failed", cpuid);
}
common_startup_init(cpu[cpuid], cpuid);
start_cpu(cpuid, cold_flag_set);
/*
* Because slave_startup() gets fired off after init()
* starts, we can't use the '?' trick to do 'boot -v'
* printing - so we always direct the 'cpu .. online'
* messages to the log.
*/
cmn_err(CE_CONT, "!cpu%d initialization complete - online\n",
cpuid);
cpu_state_change_notify(cpuid, CPU_SETUP);
if (dtrace_cpu_init != NULL)
(*dtrace_cpu_init)(cpuid);
}
/*
* since all the cpus are online now, redistribute interrupts to them.
*/
intr_redist_all_cpus();
mutex_exit(&cpu_lock);
/*
* Start the Ecache scrubber. Must be done after all calls to
* cpu_init_private for every cpu (including CPU 0).
*/
cpu_init_cache_scrub();
if (&cpu_mp_init)
cpu_mp_init();
}
/*
* Startup function executed on 'other' CPUs. This is the first
* C function after cpu_start sets up the cpu registers.
*/
static void
slave_startup(void)
{
struct cpu *cp = CPU;
ushort_t original_flags = cp->cpu_flags;
mach_htraptrace_configure(cp->cpu_id);
cpu_intrq_register(CPU);
cp->cpu_m.mutex_ready = 1;
/* acknowledge that we are done with initialization */
CPUSET_ADD(proxy_ready_set, cp->cpu_id);
/* synchronize STICK */
sticksync_slave();
if (boothowto & RB_DEBUG)
kdi_dvec_cpu_init(cp);
/*
* the slave will wait here forever -- assuming that the master
* will get back to us. if it doesn't we've got bigger problems
* than a master not replying to this slave.
* the small delay improves the slave's responsiveness to the
* master's ack and decreases the time window between master and
* slave operations.
*/
while (!CPU_IN_SET(cpu_ready_set, cp->cpu_id))
DELAY(1);
/*
* The CPU is now in cpu_ready_set, safely able to take pokes.
*/
cp->cpu_m.poke_cpu_outstanding = B_FALSE;
/* enable interrupts */
(void) spl0();
/*
* Signature block update to indicate that this CPU is in OS now.
* This needs to be done after the PIL is lowered since on
* some platforms the update code may block.
*/
CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cp->cpu_id);
/*
* park the slave thread in a safe/quiet state and wait for the master
* to finish configuring this CPU before proceeding to thread_exit().
*/
while (((volatile ushort_t)cp->cpu_flags) & CPU_QUIESCED)
DELAY(1);
/*
* Initialize CPC CPU state.
*/
kcpc_hw_startup_cpu(original_flags);
/*
* Notify the PG subsystem that the CPU has started
*/
pg_cmt_cpu_startup(CPU);
/*
* Now we are done with the startup thread, so free it up.
*/
thread_exit();
cmn_err(CE_PANIC, "slave_startup: cannot return");
/*NOTREACHED*/
}
/*ARGSUSED*/
static int
clock_tick_cpu_setup(cpu_setup_t what, int cid, void *arg)
{
cpu_t *cp, *ncp;
int i, set;
clock_tick_set_t *csp;
/*
* This function performs some computations at CPU offline/online
* time. The computed values are used during tick scheduling and
* execution phases. This avoids having to compute things on
* an every tick basis. The other benefit is that we perform the
* computations only for onlined CPUs (not offlined ones). As a
* result, no tick processing is attempted for offlined CPUs.
*
* Also, cpu_offline() calls this function before checking for
* active interrupt threads. This allows us to avoid posting
* cross calls to CPUs that are being offlined.
*/
cp = cpu[cid];
mutex_enter(&clock_tick_lock);
switch (what) {
case CPU_ON:
clock_tick_cpus[clock_tick_total_cpus] = cp;
set = clock_tick_total_cpus / clock_tick_ncpus;
csp = &clock_tick_set[set];
csp->ct_end++;
clock_tick_total_cpus++;
clock_tick_nsets =
(clock_tick_total_cpus + clock_tick_ncpus - 1) /
clock_tick_ncpus;
CPUSET_ADD(clock_tick_online_cpuset, cp->cpu_id);
membar_sync();
break;
case CPU_OFF:
if (&sync_softint != NULL)
sync_softint(clock_tick_online_cpuset);
CPUSET_DEL(clock_tick_online_cpuset, cp->cpu_id);
clock_tick_total_cpus--;
clock_tick_cpus[clock_tick_total_cpus] = NULL;
clock_tick_nsets =
(clock_tick_total_cpus + clock_tick_ncpus - 1) /
clock_tick_ncpus;
set = clock_tick_total_cpus / clock_tick_ncpus;
csp = &clock_tick_set[set];
csp->ct_end--;
i = 0;
ncp = cpu_active;
do {
if (cp == ncp)
continue;
clock_tick_cpus[i] = ncp;
i++;
} while ((ncp = ncp->cpu_next_onln) != cpu_active);
ASSERT(i == clock_tick_total_cpus);
membar_sync();
break;
default:
break;
}
mutex_exit(&clock_tick_lock);
return (0);
}
