#include <kern/machine.h>
#include <kern/cpu_number.h>
#include <kern/thread.h>
#include <kern/percpu.h>
#include <kern/timer_queue.h>
#include <kern/locks.h>
#include <arm/cpu_data.h>
#include <arm/cpuid.h>
#include <arm/caches_internal.h>
#include <arm/cpu_data_internal.h>
#include <arm/cpu_internal.h>
#include <arm/misc_protos.h>
#include <arm/machine_cpu.h>
#include <arm/rtclock.h>
#include <mach/processor_info.h>
#include <machine/atomic.h>
#include <machine/config.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <pexpert/arm/protos.h>
#include <pexpert/device_tree.h>
#include <sys/kdebug.h>
#include <arm/machine_routines.h>
#include <arm/proc_reg.h>
#include <libkern/OSAtomic.h>
SECURITY_READ_ONLY_LATE(struct percpu_base) percpu_base;
vm_address_t percpu_base_cur;
cpu_data_t PERCPU_DATA(cpu_data);
cpu_data_entry_t CpuDataEntries[MAX_CPUS];
static lck_grp_t cpu_lck_grp;
static lck_rw_t cpu_state_lock;
unsigned int real_ncpus = 1;
boolean_t idle_enable = FALSE;
uint64_t wake_abstime = 0x0ULL;
#if defined(HAS_IPI)
extern unsigned int gFastIPI;
#endif
cpu_data_t *
cpu_datap(int cpu)
{
assert(cpu <= ml_get_max_cpu_number());
return CpuDataEntries[cpu].cpu_data_vaddr;
}
kern_return_t
cpu_control(int slot_num,
processor_info_t info,
unsigned int count)
{
printf("cpu_control(%d,%p,%d) not implemented\n",
slot_num, info, count);
return KERN_FAILURE;
}
kern_return_t
cpu_info_count(processor_flavor_t flavor,
unsigned int *count)
{
switch (flavor) {
case PROCESSOR_CPU_STAT:
*count = PROCESSOR_CPU_STAT_COUNT;
return KERN_SUCCESS;
case PROCESSOR_CPU_STAT64:
*count = PROCESSOR_CPU_STAT64_COUNT;
return KERN_SUCCESS;
default:
*count = 0;
return KERN_FAILURE;
}
}
kern_return_t
cpu_info(processor_flavor_t flavor, int slot_num, processor_info_t info,
unsigned int *count)
{
cpu_data_t *cpu_data_ptr = CpuDataEntries[slot_num].cpu_data_vaddr;
switch (flavor) {
case PROCESSOR_CPU_STAT:
{
if (*count < PROCESSOR_CPU_STAT_COUNT) {
return KERN_FAILURE;
}
processor_cpu_stat_t cpu_stat = (processor_cpu_stat_t)info;
cpu_stat->irq_ex_cnt = (uint32_t)cpu_data_ptr->cpu_stat.irq_ex_cnt;
cpu_stat->ipi_cnt = (uint32_t)cpu_data_ptr->cpu_stat.ipi_cnt;
cpu_stat->timer_cnt = (uint32_t)cpu_data_ptr->cpu_stat.timer_cnt;
cpu_stat->undef_ex_cnt = (uint32_t)cpu_data_ptr->cpu_stat.undef_ex_cnt;
cpu_stat->unaligned_cnt = (uint32_t)cpu_data_ptr->cpu_stat.unaligned_cnt;
cpu_stat->vfp_cnt = (uint32_t)cpu_data_ptr->cpu_stat.vfp_cnt;
cpu_stat->vfp_shortv_cnt = 0;
cpu_stat->data_ex_cnt = (uint32_t)cpu_data_ptr->cpu_stat.data_ex_cnt;
cpu_stat->instr_ex_cnt = (uint32_t)cpu_data_ptr->cpu_stat.instr_ex_cnt;
*count = PROCESSOR_CPU_STAT_COUNT;
return KERN_SUCCESS;
}
case PROCESSOR_CPU_STAT64:
{
if (*count < PROCESSOR_CPU_STAT64_COUNT) {
return KERN_FAILURE;
}
processor_cpu_stat64_t cpu_stat = (processor_cpu_stat64_t)info;
cpu_stat->irq_ex_cnt = cpu_data_ptr->cpu_stat.irq_ex_cnt;
cpu_stat->ipi_cnt = cpu_data_ptr->cpu_stat.ipi_cnt;
cpu_stat->timer_cnt = cpu_data_ptr->cpu_stat.timer_cnt;
cpu_stat->undef_ex_cnt = cpu_data_ptr->cpu_stat.undef_ex_cnt;
cpu_stat->unaligned_cnt = cpu_data_ptr->cpu_stat.unaligned_cnt;
cpu_stat->vfp_cnt = cpu_data_ptr->cpu_stat.vfp_cnt;
cpu_stat->vfp_shortv_cnt = 0;
cpu_stat->data_ex_cnt = cpu_data_ptr->cpu_stat.data_ex_cnt;
cpu_stat->instr_ex_cnt = cpu_data_ptr->cpu_stat.instr_ex_cnt;
#if MONOTONIC
cpu_stat->pmi_cnt = cpu_data_ptr->cpu_monotonic.mtc_npmis;
#endif
*count = PROCESSOR_CPU_STAT64_COUNT;
return KERN_SUCCESS;
}
default:
return KERN_FAILURE;
}
}
void
cpu_doshutdown(void (*doshutdown)(processor_t),
processor_t processor)
{
doshutdown(processor);
}
void
cpu_idle_tickle(void)
{
boolean_t intr;
cpu_data_t *cpu_data_ptr;
uint64_t new_idle_timeout_ticks = 0x0ULL;
intr = ml_set_interrupts_enabled(FALSE);
cpu_data_ptr = getCpuDatap();
if (cpu_data_ptr->idle_timer_notify != NULL) {
cpu_data_ptr->idle_timer_notify(cpu_data_ptr->idle_timer_refcon, &new_idle_timeout_ticks);
if (new_idle_timeout_ticks != 0x0ULL) {
clock_absolutetime_interval_to_deadline(new_idle_timeout_ticks, &cpu_data_ptr->idle_timer_deadline);
} else {
cpu_data_ptr->idle_timer_deadline = 0x0ULL;
}
timer_resync_deadlines();
}
(void) ml_set_interrupts_enabled(intr);
}
static void
cpu_handle_xcall(cpu_data_t *cpu_data_ptr)
{
broadcastFunc xfunc;
void *xparam;
os_atomic_thread_fence(acquire);
if (cpu_data_ptr->cpu_xcall_p0 != NULL && cpu_data_ptr->cpu_xcall_p1 != NULL) {
xfunc = cpu_data_ptr->cpu_xcall_p0;
INTERRUPT_MASKED_DEBUG_START(xfunc, DBG_INTR_TYPE_IPI);
xparam = cpu_data_ptr->cpu_xcall_p1;
cpu_data_ptr->cpu_xcall_p0 = NULL;
cpu_data_ptr->cpu_xcall_p1 = NULL;
os_atomic_thread_fence(acq_rel);
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPxcall, relaxed);
xfunc(xparam);
INTERRUPT_MASKED_DEBUG_END();
}
if (cpu_data_ptr->cpu_imm_xcall_p0 != NULL && cpu_data_ptr->cpu_imm_xcall_p1 != NULL) {
xfunc = cpu_data_ptr->cpu_imm_xcall_p0;
INTERRUPT_MASKED_DEBUG_START(xfunc, DBG_INTR_TYPE_IPI);
xparam = cpu_data_ptr->cpu_imm_xcall_p1;
cpu_data_ptr->cpu_imm_xcall_p0 = NULL;
cpu_data_ptr->cpu_imm_xcall_p1 = NULL;
os_atomic_thread_fence(acq_rel);
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPxcallImm, relaxed);
xfunc(xparam);
INTERRUPT_MASKED_DEBUG_END();
}
}
static unsigned int
cpu_broadcast_xcall_internal(unsigned int signal,
uint32_t *synch,
boolean_t self_xcall,
broadcastFunc func,
void *parm)
{
boolean_t intr;
cpu_data_t *cpu_data_ptr;
cpu_data_t *target_cpu_datap;
unsigned int failsig;
int cpu;
int max_cpu = ml_get_max_cpu_number() + 1;
assert(func);
assert(parm);
intr = ml_set_interrupts_enabled(FALSE);
cpu_data_ptr = getCpuDatap();
failsig = 0;
if (synch != NULL) {
*synch = max_cpu;
assert_wait((event_t)synch, THREAD_UNINT);
}
for (cpu = 0; cpu < max_cpu; cpu++) {
target_cpu_datap = (cpu_data_t *)CpuDataEntries[cpu].cpu_data_vaddr;
if (target_cpu_datap == cpu_data_ptr) {
continue;
}
if ((target_cpu_datap == NULL) ||
KERN_SUCCESS != cpu_signal(target_cpu_datap, signal, (void *)func, parm)) {
failsig++;
}
}
if (self_xcall) {
func(parm);
}
(void) ml_set_interrupts_enabled(intr);
if (synch != NULL) {
if (os_atomic_sub(synch, (!self_xcall) ? failsig + 1 : failsig, relaxed) == 0) {
clear_wait(current_thread(), THREAD_AWAKENED);
} else {
thread_block(THREAD_CONTINUE_NULL);
}
}
if (!self_xcall) {
return max_cpu - failsig - 1;
} else {
return max_cpu - failsig;
}
}
unsigned int
cpu_broadcast_xcall(uint32_t *synch,
boolean_t self_xcall,
broadcastFunc func,
void *parm)
{
return cpu_broadcast_xcall_internal(SIGPxcall, synch, self_xcall, func, parm);
}
struct cpu_broadcast_xcall_simple_data {
broadcastFunc func;
void* parm;
uint32_t sync;
};
static void
cpu_broadcast_xcall_simple_cbk(void *parm)
{
struct cpu_broadcast_xcall_simple_data *data = (struct cpu_broadcast_xcall_simple_data*)parm;
data->func(data->parm);
if (os_atomic_dec(&data->sync, relaxed) == 0) {
thread_wakeup((event_t)&data->sync);
}
}
static unsigned int
cpu_xcall_simple(boolean_t self_xcall,
broadcastFunc func,
void *parm,
bool immediate)
{
struct cpu_broadcast_xcall_simple_data data = {};
data.func = func;
data.parm = parm;
return cpu_broadcast_xcall_internal(immediate ? SIGPxcallImm : SIGPxcall, &data.sync, self_xcall, cpu_broadcast_xcall_simple_cbk, &data);
}
unsigned int
cpu_broadcast_immediate_xcall(uint32_t *synch,
boolean_t self_xcall,
broadcastFunc func,
void *parm)
{
return cpu_broadcast_xcall_internal(SIGPxcallImm, synch, self_xcall, func, parm);
}
unsigned int
cpu_broadcast_xcall_simple(boolean_t self_xcall,
broadcastFunc func,
void *parm)
{
return cpu_xcall_simple(self_xcall, func, parm, false);
}
unsigned int
cpu_broadcast_immediate_xcall_simple(boolean_t self_xcall,
broadcastFunc func,
void *parm)
{
return cpu_xcall_simple(self_xcall, func, parm, true);
}
static kern_return_t
cpu_xcall_internal(unsigned int signal, int cpu_number, broadcastFunc func, void *param)
{
cpu_data_t *target_cpu_datap;
if ((cpu_number < 0) || (cpu_number > ml_get_max_cpu_number())) {
return KERN_INVALID_ARGUMENT;
}
if (func == NULL || param == NULL) {
return KERN_INVALID_ARGUMENT;
}
target_cpu_datap = (cpu_data_t*)CpuDataEntries[cpu_number].cpu_data_vaddr;
if (target_cpu_datap == NULL) {
return KERN_INVALID_ARGUMENT;
}
return cpu_signal(target_cpu_datap, signal, (void*)func, param);
}
kern_return_t
cpu_xcall(int cpu_number, broadcastFunc func, void *param)
{
return cpu_xcall_internal(SIGPxcall, cpu_number, func, param);
}
kern_return_t
cpu_immediate_xcall(int cpu_number, broadcastFunc func, void *param)
{
return cpu_xcall_internal(SIGPxcallImm, cpu_number, func, param);
}
static kern_return_t
cpu_signal_internal(cpu_data_t *target_proc,
unsigned int signal,
void *p0,
void *p1,
boolean_t defer)
{
unsigned int Check_SIGPdisabled;
int current_signals;
Boolean swap_success;
boolean_t interruptible = ml_set_interrupts_enabled(FALSE);
cpu_data_t *current_proc = getCpuDatap();
if (defer) {
assert(signal == SIGPnop);
}
if (current_proc != target_proc) {
Check_SIGPdisabled = SIGPdisabled;
} else {
Check_SIGPdisabled = 0;
}
if ((signal == SIGPxcall) || (signal == SIGPxcallImm)) {
do {
current_signals = target_proc->cpu_signal;
if ((current_signals & SIGPdisabled) == SIGPdisabled) {
ml_set_interrupts_enabled(interruptible);
return KERN_FAILURE;
}
swap_success = OSCompareAndSwap(current_signals & (~signal), current_signals | signal,
&target_proc->cpu_signal);
if (!swap_success && (signal == SIGPxcallImm) && (target_proc->cpu_signal & SIGPxcallImm)) {
ml_set_interrupts_enabled(interruptible);
return KERN_ALREADY_WAITING;
}
if (!swap_success && (current_proc->cpu_signal & signal)) {
cpu_handle_xcall(current_proc);
}
} while (!swap_success);
if (signal == SIGPxcallImm) {
target_proc->cpu_imm_xcall_p0 = p0;
target_proc->cpu_imm_xcall_p1 = p1;
} else {
target_proc->cpu_xcall_p0 = p0;
target_proc->cpu_xcall_p1 = p1;
}
} else {
do {
current_signals = target_proc->cpu_signal;
if ((Check_SIGPdisabled != 0) && (current_signals & Check_SIGPdisabled) == SIGPdisabled) {
ml_set_interrupts_enabled(interruptible);
return KERN_FAILURE;
}
swap_success = OSCompareAndSwap(current_signals, current_signals | signal,
&target_proc->cpu_signal);
} while (!swap_success);
}
__builtin_arm_dsb(DSB_ISH);
if (!(target_proc->cpu_signal & SIGPdisabled)) {
if (defer) {
#if defined(HAS_IPI)
if (gFastIPI) {
ml_cpu_signal_deferred(target_proc->cpu_phys_id);
} else {
PE_cpu_signal_deferred(getCpuDatap()->cpu_id, target_proc->cpu_id);
}
#else
PE_cpu_signal_deferred(getCpuDatap()->cpu_id, target_proc->cpu_id);
#endif
} else {
#if defined(HAS_IPI)
if (gFastIPI) {
ml_cpu_signal(target_proc->cpu_phys_id);
} else {
PE_cpu_signal(getCpuDatap()->cpu_id, target_proc->cpu_id);
}
#else
PE_cpu_signal(getCpuDatap()->cpu_id, target_proc->cpu_id);
#endif
}
}
ml_set_interrupts_enabled(interruptible);
return KERN_SUCCESS;
}
kern_return_t
cpu_signal(cpu_data_t *target_proc,
unsigned int signal,
void *p0,
void *p1)
{
return cpu_signal_internal(target_proc, signal, p0, p1, FALSE);
}
kern_return_t
cpu_signal_deferred(cpu_data_t *target_proc)
{
return cpu_signal_internal(target_proc, SIGPnop, NULL, NULL, TRUE);
}
void
cpu_signal_cancel(cpu_data_t *target_proc)
{
if (!(target_proc->cpu_signal & SIGPdisabled)) {
#if defined(HAS_IPI)
if (gFastIPI) {
ml_cpu_signal_retract(target_proc->cpu_phys_id);
} else {
PE_cpu_signal_cancel(getCpuDatap()->cpu_id, target_proc->cpu_id);
}
#else
PE_cpu_signal_cancel(getCpuDatap()->cpu_id, target_proc->cpu_id);
#endif
}
}
void
cpu_signal_handler(void)
{
cpu_signal_handler_internal(FALSE);
}
void
cpu_signal_handler_internal(boolean_t disable_signal)
{
cpu_data_t *cpu_data_ptr = getCpuDatap();
unsigned int cpu_signal;
cpu_data_ptr->cpu_stat.ipi_cnt++;
cpu_data_ptr->cpu_stat.ipi_cnt_wake++;
SCHED_STATS_INC(ipi_count);
cpu_signal = os_atomic_or(&cpu_data_ptr->cpu_signal, 0, relaxed);
if ((!(cpu_signal & SIGPdisabled)) && (disable_signal == TRUE)) {
os_atomic_or(&cpu_data_ptr->cpu_signal, SIGPdisabled, relaxed);
} else if ((cpu_signal & SIGPdisabled) && (disable_signal == FALSE)) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPdisabled, relaxed);
}
while (cpu_signal & ~SIGPdisabled) {
if (cpu_signal & SIGPdec) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPdec, relaxed);
INTERRUPT_MASKED_DEBUG_START(rtclock_intr, DBG_INTR_TYPE_IPI);
rtclock_intr(FALSE);
INTERRUPT_MASKED_DEBUG_END();
}
#if KPERF
if (cpu_signal & SIGPkppet) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPkppet, relaxed);
extern void kperf_signal_handler(void);
INTERRUPT_MASKED_DEBUG_START(kperf_signal_handler, DBG_INTR_TYPE_IPI);
kperf_signal_handler();
INTERRUPT_MASKED_DEBUG_END();
}
#endif
if (cpu_signal & (SIGPxcall | SIGPxcallImm)) {
cpu_handle_xcall(cpu_data_ptr);
}
if (cpu_signal & SIGPast) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPast, relaxed);
INTERRUPT_MASKED_DEBUG_START(ast_check, DBG_INTR_TYPE_IPI);
ast_check(current_processor());
INTERRUPT_MASKED_DEBUG_END();
}
if (cpu_signal & SIGPdebug) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPdebug, relaxed);
INTERRUPT_MASKED_DEBUG_START(DebuggerXCall, DBG_INTR_TYPE_IPI);
DebuggerXCall(cpu_data_ptr->cpu_int_state);
INTERRUPT_MASKED_DEBUG_END();
}
#if defined(ARMA7)
if (cpu_signal & SIGPLWFlush) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPLWFlush, relaxed);
INTERRUPT_MASKED_DEBUG_START(cache_xcall_handler, DBG_INTR_TYPE_IPI);
cache_xcall_handler(LWFlush);
INTERRUPT_MASKED_DEBUG_END();
}
if (cpu_signal & SIGPLWClean) {
os_atomic_andnot(&cpu_data_ptr->cpu_signal, SIGPLWClean, relaxed);
INTERRUPT_MASKED_DEBUG_START(cache_xcall_handler, DBG_INTR_TYPE_IPI);
cache_xcall_handler(LWClean);
INTERRUPT_MASKED_DEBUG_END();
}
#endif
cpu_signal = os_atomic_or(&cpu_data_ptr->cpu_signal, 0, relaxed);
}
}
void
cpu_exit_wait(int cpu_id)
{
#if USE_APPLEARMSMP
if (!ml_is_quiescing()) {
ml_topology_cpu_t *cpu = &ml_get_topology_info()->cpus[cpu_id];
assert(cpu && cpu->cpu_IMPL_regs);
volatile uint64_t *cpu_sts = (void *)(cpu->cpu_IMPL_regs + CPU_PIO_CPU_STS_OFFSET);
while ((*cpu_sts & CPU_PIO_CPU_STS_cpuRunSt_mask) != 0x00) {
__builtin_arm_dsb(DSB_ISH);
}
return;
}
#endif
if (cpu_id != master_cpu) {
cpu_data_t *cpu_data_ptr;
cpu_data_ptr = CpuDataEntries[cpu_id].cpu_data_vaddr;
while (!((*(volatile unsigned int*)&cpu_data_ptr->cpu_sleep_token) == ARM_CPU_ON_SLEEP_PATH)) {
}
;
}
}
boolean_t
cpu_can_exit(__unused int cpu)
{
return TRUE;
}
void
cpu_machine_init(void)
{
static boolean_t started = FALSE;
cpu_data_t *cpu_data_ptr;
cpu_data_ptr = getCpuDatap();
started = ((cpu_data_ptr->cpu_flags & StartedState) == StartedState);
if (cpu_data_ptr->cpu_cache_dispatch != NULL) {
platform_cache_init();
}
PE_cpu_machine_init(cpu_data_ptr->cpu_id, !started);
cpu_data_ptr->cpu_flags |= StartedState;
ml_init_interrupt();
}
processor_t
current_processor(void)
{
return PERCPU_GET(processor);
}
processor_t
cpu_to_processor(int cpu)
{
cpu_data_t *cpu_data = cpu_datap(cpu);
if (cpu_data != NULL) {
return PERCPU_GET_RELATIVE(processor, cpu_data, cpu_data);
} else {
return NULL;
}
}
cpu_data_t *
processor_to_cpu_datap(processor_t processor)
{
assert(processor->cpu_id <= ml_get_max_cpu_number());
assert(CpuDataEntries[processor->cpu_id].cpu_data_vaddr != NULL);
return PERCPU_GET_RELATIVE(cpu_data, processor, processor);
}
__startup_func
static void
cpu_data_startup_init(void)
{
vm_size_t size = percpu_section_size() * (ml_get_cpu_count() - 1);
percpu_base.size = percpu_section_size();
if (ml_get_cpu_count() == 1) {
percpu_base.start = VM_MAX_KERNEL_ADDRESS;
return;
}
percpu_base.start = (vm_offset_t)pmap_steal_memory(round_page(size));
bzero((void *)percpu_base.start, round_page(size));
percpu_base.start -= percpu_section_start();
percpu_base.end = percpu_base.start + size - 1;
percpu_base_cur = percpu_base.start;
}
STARTUP(PMAP_STEAL, STARTUP_RANK_FIRST, cpu_data_startup_init);
cpu_data_t *
cpu_data_alloc(boolean_t is_boot_cpu)
{
cpu_data_t *cpu_data_ptr = NULL;
vm_address_t base;
if (is_boot_cpu) {
cpu_data_ptr = PERCPU_GET_MASTER(cpu_data);
} else {
base = os_atomic_add_orig(&percpu_base_cur,
percpu_section_size(), relaxed);
cpu_data_ptr = PERCPU_GET_WITH_BASE(base, cpu_data);
cpu_stack_alloc(cpu_data_ptr);
}
return cpu_data_ptr;
}
ast_t *
ast_pending(void)
{
return &getCpuDatap()->cpu_pending_ast;
}
cpu_type_t
slot_type(int slot_num)
{
return cpu_datap(slot_num)->cpu_type;
}
cpu_subtype_t
slot_subtype(int slot_num)
{
return cpu_datap(slot_num)->cpu_subtype;
}
cpu_threadtype_t
slot_threadtype(int slot_num)
{
return cpu_datap(slot_num)->cpu_threadtype;
}
cpu_type_t
cpu_type(void)
{
return getCpuDatap()->cpu_type;
}
cpu_subtype_t
cpu_subtype(void)
{
return getCpuDatap()->cpu_subtype;
}
cpu_threadtype_t
cpu_threadtype(void)
{
return getCpuDatap()->cpu_threadtype;
}
int
cpu_number(void)
{
return getCpuDatap()->cpu_number;
}
vm_offset_t
current_percpu_base(void)
{
return current_thread()->machine.pcpu_data_base;
}
uint64_t
ml_get_wake_timebase(void)
{
return wake_abstime;
}
bool
ml_cpu_signal_is_enabled(void)
{
return !(getCpuDatap()->cpu_signal & SIGPdisabled);
}
bool
ml_cpu_can_exit(__unused int cpu_id)
{
if (ml_is_quiescing()) {
return true;
}
#if HAS_CLUSTER && USE_APPLEARMSMP
if (CpuDataEntries[cpu_id].cpu_data_vaddr != &BootCpuData) {
return true;
}
#endif
return false;
}
void
ml_cpu_init_state(void)
{
lck_grp_init(&cpu_lck_grp, "cpu_lck_grp", LCK_GRP_ATTR_NULL);
lck_rw_init(&cpu_state_lock, &cpu_lck_grp, LCK_ATTR_NULL);
}
#ifdef USE_APPLEARMSMP
void
ml_cpu_begin_state_transition(int cpu_id)
{
lck_rw_lock_exclusive(&cpu_state_lock);
CpuDataEntries[cpu_id].cpu_data_vaddr->in_state_transition = true;
lck_rw_unlock_exclusive(&cpu_state_lock);
}
void
ml_cpu_end_state_transition(int cpu_id)
{
lck_rw_lock_exclusive(&cpu_state_lock);
CpuDataEntries[cpu_id].cpu_data_vaddr->in_state_transition = false;
lck_rw_unlock_exclusive(&cpu_state_lock);
}
void
ml_cpu_begin_loop(void)
{
lck_rw_lock_shared(&cpu_state_lock);
}
void
ml_cpu_end_loop(void)
{
lck_rw_unlock_shared(&cpu_state_lock);
}
#else
void
ml_cpu_begin_state_transition(__unused int cpu_id)
{
}
void
ml_cpu_end_state_transition(__unused int cpu_id)
{
}
void
ml_cpu_begin_loop(void)
{
}
void
ml_cpu_end_loop(void)
{
}
#endif