X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..4452a7af2eac33dbad800bcc91f2399d62c18f53:/osfmk/kern/clock.c diff --git a/osfmk/kern/clock.c b/osfmk/kern/clock.c index a0b3f9077..b9d0a075b 100644 --- a/osfmk/kern/clock.c +++ b/osfmk/kern/clock.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -29,109 +29,89 @@ * @OSF_COPYRIGHT@ */ /* - * File: kern/clock.c - * Purpose: Routines for the creation and use of kernel - * alarm clock services. This file and the ipc - * routines in kern/ipc_clock.c constitute the - * machine-independent clock service layer. */ -#include - #include -#include -#include -#include -#include -#include #include -#include #include #include #include -#include #include -#include +#include + +#include -#include -#include +#include #include -#include #include -#include -#include -#include +decl_simple_lock_data(static,clock_lock) /* - * Exported interface + * Time of day (calendar) variables. + * + * Algorithm: + * + * TOD <- (seconds + epoch, fraction) <- CONV(current absolute time + offset) + * + * where CONV converts absolute time units into seconds and a fraction. */ +static struct clock_calend { + uint64_t epoch; + uint64_t offset; +} clock_calend; -#include -#include +/* + * Calendar adjustment variables and values. + */ +#define calend_adjperiod (NSEC_PER_SEC / 100) /* adjustment period, ns */ +#define calend_adjskew (40 * NSEC_PER_USEC) /* "standard" skew, ns / period */ +#define calend_adjbig (NSEC_PER_SEC) /* use 10x skew above adjbig ns */ + +static uint64_t calend_adjstart; /* Absolute time value for start of this adjustment period */ +static uint32_t calend_adjoffset; /* Absolute time offset for this adjustment period as absolute value */ -/* local data declarations */ -decl_simple_lock_data(static,ClockLock) /* clock system synchronization */ -static struct zone *alarm_zone; /* zone for user alarms */ -static struct alarm *alrmfree; /* alarm free list pointer */ -static struct alarm *alrmdone; /* alarm done list pointer */ -static long alrm_seqno; /* uniquely identifies alarms */ -static thread_call_data_t alarm_deliver; +static int32_t calend_adjdelta; /* Nanosecond time delta for this adjustment period */ +static int64_t calend_adjtotal; /* Nanosecond remaining total adjustment */ -decl_simple_lock_data(static,calend_adjlock) +static uint64_t calend_adjdeadline; /* Absolute time value for next adjustment period */ +static uint32_t calend_adjinterval; /* Absolute time interval of adjustment period */ static timer_call_data_t calend_adjcall; -static uint64_t calend_adjdeadline; +static uint32_t calend_adjactive; + +static uint32_t calend_set_adjustment( + int32_t *secs, + int32_t *microsecs); + +static void calend_adjust_call(void); +static uint32_t calend_adjust(void); static thread_call_data_t calend_wakecall; -/* external declarations */ -extern struct clock clock_list[]; -extern int clock_count; - -/* local clock subroutines */ -static -void flush_alarms( - clock_t clock); - -static -void post_alarm( - clock_t clock, - alarm_t alarm); - -static -int check_time( - alarm_type_t alarm_type, - mach_timespec_t *alarm_time, - mach_timespec_t *clock_time); - -static -void clock_alarm_deliver( - thread_call_param_t p0, - thread_call_param_t p1); - -static -void calend_adjust_call( - timer_call_param_t p0, - timer_call_param_t p1); - -static -void calend_dowakeup( - thread_call_param_t p0, - thread_call_param_t p1); +extern void IOKitResetTime(void); -/* - * Macros to lock/unlock clock system. - */ -#define LOCK_CLOCK(s) \ - s = splclock(); \ - simple_lock(&ClockLock); +static uint64_t clock_boottime; /* Seconds boottime epoch */ -#define UNLOCK_CLOCK(s) \ - simple_unlock(&ClockLock); \ - splx(s); +#define TIME_ADD(rsecs, secs, rfrac, frac, unit) \ +MACRO_BEGIN \ + if (((rfrac) += (frac)) >= (unit)) { \ + (rfrac) -= (unit); \ + (rsecs) += 1; \ + } \ + (rsecs) += (secs); \ +MACRO_END + +#define TIME_SUB(rsecs, secs, rfrac, frac, unit) \ +MACRO_BEGIN \ + if ((int32_t)((rfrac) -= (frac)) < 0) { \ + (rfrac) += (unit); \ + (rsecs) -= 1; \ + } \ + (rsecs) -= (secs); \ +MACRO_END /* * clock_config: @@ -141,37 +121,17 @@ void calend_dowakeup( void clock_config(void) { - clock_t clock; - register int i; - - assert(cpu_number() == master_cpu); - - simple_lock_init(&ClockLock, 0); - thread_call_setup(&alarm_deliver, clock_alarm_deliver, NULL); + simple_lock_init(&clock_lock, 0); - simple_lock_init(&calend_adjlock, 0); - timer_call_setup(&calend_adjcall, calend_adjust_call, NULL); + timer_call_setup(&calend_adjcall, (timer_call_func_t)calend_adjust_call, NULL); + thread_call_setup(&calend_wakecall, (thread_call_func_t)IOKitResetTime, NULL); - thread_call_setup(&calend_wakecall, calend_dowakeup, NULL); - - /* - * Configure clock devices. - */ - for (i = 0; i < clock_count; i++) { - clock = &clock_list[i]; - if (clock->cl_ops) { - if ((*clock->cl_ops->c_config)() == 0) - clock->cl_ops = 0; - } - } + clock_oldconfig(); /* * Initialize the timer callouts. */ timer_call_initialize(); - - /* start alarm sequence numbers at 0 */ - alrm_seqno = 0; } /* @@ -182,696 +142,506 @@ clock_config(void) void clock_init(void) { - clock_t clock; - register int i; - - /* - * Initialize basic clock structures. - */ - for (i = 0; i < clock_count; i++) { - clock = &clock_list[i]; - if (clock->cl_ops && clock->cl_ops->c_init) - (*clock->cl_ops->c_init)(); - } + clock_oldinit(); } /* - * Called by machine dependent code - * to initialize areas dependent on the - * timebase value. May be called multiple - * times during start up. + * clock_timebase_init: + * + * Called by machine dependent code + * to initialize areas dependent on the + * timebase value. May be called multiple + * times during start up. */ void clock_timebase_init(void) { - sched_timebase_init(); -} - -/* - * Initialize the clock ipc service facility. - */ -void -clock_service_create(void) -{ - clock_t clock; - register int i; + uint64_t abstime; - /* - * Initialize ipc clock services. - */ - for (i = 0; i < clock_count; i++) { - clock = &clock_list[i]; - if (clock->cl_ops) { - ipc_clock_init(clock); - ipc_clock_enable(clock); - } - } + nanoseconds_to_absolutetime(calend_adjperiod, &abstime); + calend_adjinterval = abstime; - /* - * Perform miscellaneous late - * initialization. - */ - i = sizeof(struct alarm); - alarm_zone = zinit(i, (4096/i)*i, 10*i, "alarms"); + sched_timebase_init(); } /* - * Get the service port on a clock. + * mach_timebase_info_trap: + * + * User trap returns timebase constant. */ kern_return_t -host_get_clock_service( - host_t host, - clock_id_t clock_id, - clock_t *clock) /* OUT */ +mach_timebase_info_trap( + struct mach_timebase_info_trap_args *args) { - if (host == HOST_NULL || clock_id < 0 || clock_id >= clock_count) { - *clock = CLOCK_NULL; - return (KERN_INVALID_ARGUMENT); - } + mach_vm_address_t out_info_addr = args->info; + mach_timebase_info_data_t info; - *clock = &clock_list[clock_id]; - if ((*clock)->cl_ops == 0) - return (KERN_FAILURE); - return (KERN_SUCCESS); -} + clock_timebase_info(&info); -/* - * Get the control port on a clock. - */ -kern_return_t -host_get_clock_control( - host_priv_t host_priv, - clock_id_t clock_id, - clock_t *clock) /* OUT */ -{ - if (host_priv == HOST_PRIV_NULL || clock_id < 0 || clock_id >= clock_count) { - *clock = CLOCK_NULL; - return (KERN_INVALID_ARGUMENT); - } + copyout((void *)&info, out_info_addr, sizeof (info)); - *clock = &clock_list[clock_id]; - if ((*clock)->cl_ops == 0) - return (KERN_FAILURE); return (KERN_SUCCESS); } /* - * Get the current clock time. + * Calendar routines. */ -kern_return_t -clock_get_time( - clock_t clock, - mach_timespec_t *cur_time) /* OUT */ -{ - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - return ((*clock->cl_ops->c_gettime)(cur_time)); -} /* - * Get clock attributes. + * clock_get_calendar_microtime: + * + * Returns the current calendar value, + * microseconds as the fraction. */ -kern_return_t -clock_get_attributes( - clock_t clock, - clock_flavor_t flavor, - clock_attr_t attr, /* OUT */ - mach_msg_type_number_t *count) /* IN/OUT */ +void +clock_get_calendar_microtime( + uint32_t *secs, + uint32_t *microsecs) { - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - if (clock->cl_ops->c_getattr) - return(clock->cl_ops->c_getattr(flavor, attr, count)); - else - return (KERN_FAILURE); -} + uint64_t now; + spl_t s; -/* - * Set the current clock time. - */ -kern_return_t -clock_set_time( - clock_t clock, - mach_timespec_t new_time) -{ - mach_timespec_t *clock_time; + s = splclock(); + simple_lock(&clock_lock); - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - if (clock->cl_ops->c_settime == NULL) - return (KERN_FAILURE); - clock_time = &new_time; - if (BAD_MACH_TIMESPEC(clock_time)) - return (KERN_INVALID_VALUE); + now = mach_absolute_time(); - /* - * Flush all outstanding alarms. - */ - flush_alarms(clock); + if (calend_adjdelta < 0) { + uint32_t t32; - /* - * Set the new time. - */ - return (clock->cl_ops->c_settime(clock_time)); + if (now > calend_adjstart) { + t32 = now - calend_adjstart; + + if (t32 > calend_adjoffset) + now -= calend_adjoffset; + else + now = calend_adjstart; + } + } + + now += clock_calend.offset; + + absolutetime_to_microtime(now, secs, microsecs); + + *secs += clock_calend.epoch; + + simple_unlock(&clock_lock); + splx(s); } /* - * Set the clock alarm resolution. + * clock_get_calendar_nanotime: + * + * Returns the current calendar value, + * nanoseconds as the fraction. + * + * Since we do not have an interface to + * set the calendar with resolution greater + * than a microsecond, we honor that here. */ -kern_return_t -clock_set_attributes( - clock_t clock, - clock_flavor_t flavor, - clock_attr_t attr, - mach_msg_type_number_t count) +void +clock_get_calendar_nanotime( + uint32_t *secs, + uint32_t *nanosecs) { - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - if (clock->cl_ops->c_setattr) - return (clock->cl_ops->c_setattr(flavor, attr, count)); - else - return (KERN_FAILURE); + uint64_t now; + spl_t s; + + s = splclock(); + simple_lock(&clock_lock); + + now = mach_absolute_time(); + + if (calend_adjdelta < 0) { + uint32_t t32; + + if (now > calend_adjstart) { + t32 = now - calend_adjstart; + + if (t32 > calend_adjoffset) + now -= calend_adjoffset; + else + now = calend_adjstart; + } + } + + now += clock_calend.offset; + + absolutetime_to_microtime(now, secs, nanosecs); + *nanosecs *= NSEC_PER_USEC; + + *secs += clock_calend.epoch; + + simple_unlock(&clock_lock); + splx(s); } /* - * Setup a clock alarm. + * clock_gettimeofday: + * + * Kernel interface for commpage implementation of + * gettimeofday() syscall. + * + * Returns the current calendar value, and updates the + * commpage info as appropriate. Because most calls to + * gettimeofday() are handled in user mode by the commpage, + * this routine should be used infrequently. */ -kern_return_t -clock_alarm( - clock_t clock, - alarm_type_t alarm_type, - mach_timespec_t alarm_time, - ipc_port_t alarm_port, - mach_msg_type_name_t alarm_port_type) +void +clock_gettimeofday( + uint32_t *secs, + uint32_t *microsecs) { - alarm_t alarm; - mach_timespec_t clock_time; - int chkstat; - kern_return_t reply_code; - spl_t s; - - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - if (clock->cl_ops->c_setalrm == 0) - return (KERN_FAILURE); - if (IP_VALID(alarm_port) == 0) - return (KERN_INVALID_CAPABILITY); + uint64_t now; + spl_t s; - /* - * Check alarm parameters. If parameters are invalid, - * send alarm message immediately. - */ - (*clock->cl_ops->c_gettime)(&clock_time); - chkstat = check_time(alarm_type, &alarm_time, &clock_time); - if (chkstat <= 0) { - reply_code = (chkstat < 0 ? KERN_INVALID_VALUE : KERN_SUCCESS); - clock_alarm_reply(alarm_port, alarm_port_type, - reply_code, alarm_type, clock_time); - return (KERN_SUCCESS); + s = splclock(); + simple_lock(&clock_lock); + + now = mach_absolute_time(); + + if (calend_adjdelta >= 0) { + clock_gettimeofday_set_commpage(now, clock_calend.epoch, clock_calend.offset, secs, microsecs); } + else { + uint32_t t32; - /* - * Get alarm and add to clock alarm list. - */ + if (now > calend_adjstart) { + t32 = now - calend_adjstart; + + if (t32 > calend_adjoffset) + now -= calend_adjoffset; + else + now = calend_adjstart; + } + + now += clock_calend.offset; - LOCK_CLOCK(s); - if ((alarm = alrmfree) == 0) { - UNLOCK_CLOCK(s); - alarm = (alarm_t) zalloc(alarm_zone); - if (alarm == 0) - return (KERN_RESOURCE_SHORTAGE); - LOCK_CLOCK(s); + absolutetime_to_microtime(now, secs, microsecs); + + *secs += clock_calend.epoch; } - else - alrmfree = alarm->al_next; - - alarm->al_status = ALARM_CLOCK; - alarm->al_time = alarm_time; - alarm->al_type = alarm_type; - alarm->al_port = alarm_port; - alarm->al_port_type = alarm_port_type; - alarm->al_clock = clock; - alarm->al_seqno = alrm_seqno++; - post_alarm(clock, alarm); - UNLOCK_CLOCK(s); - return (KERN_SUCCESS); + simple_unlock(&clock_lock); + splx(s); } /* - * Sleep on a clock. System trap. User-level libmach clock_sleep - * interface call takes a mach_timespec_t sleep_time argument which it - * converts to sleep_sec and sleep_nsec arguments which are then - * passed to clock_sleep_trap. + * clock_set_calendar_microtime: + * + * Sets the current calendar value by + * recalculating the epoch and offset + * from the system clock. + * + * Also adjusts the boottime to keep the + * value consistent, writes the new + * calendar value to the platform clock, + * and sends calendar change notifications. */ -kern_return_t -clock_sleep_trap( - struct clock_sleep_trap_args *args) +void +clock_set_calendar_microtime( + uint32_t secs, + uint32_t microsecs) { - mach_port_name_t clock_name = args->clock_name; - sleep_type_t sleep_type = args->sleep_type; - int sleep_sec = args->sleep_sec; - int sleep_nsec = args->sleep_nsec; - mach_vm_address_t wakeup_time_addr = args->wakeup_time; - clock_t clock; - mach_timespec_t swtime; - kern_return_t rvalue; + uint32_t sys, microsys; + uint32_t newsecs; + spl_t s; - /* - * Convert the trap parameters. - */ - if (clock_name != MACH_PORT_NULL) - clock = port_name_to_clock(clock_name); - else - clock = &clock_list[SYSTEM_CLOCK]; + newsecs = (microsecs < 500*USEC_PER_SEC)? + secs: secs + 1; + + s = splclock(); + simple_lock(&clock_lock); - swtime.tv_sec = sleep_sec; - swtime.tv_nsec = sleep_nsec; + commpage_set_timestamp(0,0,0); /* - * Call the actual clock_sleep routine. + * Calculate the new calendar epoch based on + * the new value and the system clock. */ - rvalue = clock_sleep_internal(clock, sleep_type, &swtime); + clock_get_system_microtime(&sys, µsys); + TIME_SUB(secs, sys, microsecs, microsys, USEC_PER_SEC); /* - * Return current time as wakeup time. + * Adjust the boottime based on the delta. */ - if (rvalue != KERN_INVALID_ARGUMENT && rvalue != KERN_FAILURE) { - copyout((char *)&swtime, wakeup_time_addr, sizeof(mach_timespec_t)); - } - return (rvalue); -} - -/* - * Kernel internally callable clock sleep routine. The calling - * thread is suspended until the requested sleep time is reached. - */ -kern_return_t -clock_sleep_internal( - clock_t clock, - sleep_type_t sleep_type, - mach_timespec_t *sleep_time) -{ - alarm_t alarm; - mach_timespec_t clock_time; - kern_return_t rvalue; - int chkstat; - spl_t s; - - if (clock == CLOCK_NULL) - return (KERN_INVALID_ARGUMENT); - if (clock->cl_ops->c_setalrm == 0) - return (KERN_FAILURE); + clock_boottime += secs - clock_calend.epoch; /* - * Check sleep parameters. If parameters are invalid - * return an error, otherwise post alarm request. + * Set the new calendar epoch. */ - (*clock->cl_ops->c_gettime)(&clock_time); + clock_calend.epoch = secs; + nanoseconds_to_absolutetime((uint64_t)microsecs * NSEC_PER_USEC, &clock_calend.offset); - chkstat = check_time(sleep_type, sleep_time, &clock_time); - if (chkstat < 0) - return (KERN_INVALID_VALUE); - rvalue = KERN_SUCCESS; - if (chkstat > 0) { - wait_result_t wait_result; + /* + * Cancel any adjustment in progress. + */ + calend_adjdelta = calend_adjtotal = 0; - /* - * Get alarm and add to clock alarm list. - */ + simple_unlock(&clock_lock); - LOCK_CLOCK(s); - if ((alarm = alrmfree) == 0) { - UNLOCK_CLOCK(s); - alarm = (alarm_t) zalloc(alarm_zone); - if (alarm == 0) - return (KERN_RESOURCE_SHORTAGE); - LOCK_CLOCK(s); - } - else - alrmfree = alarm->al_next; + /* + * Set the new value for the platform clock. + */ + PESetGMTTimeOfDay(newsecs); - /* - * Wait for alarm to occur. - */ - wait_result = assert_wait((event_t)alarm, THREAD_ABORTSAFE); - if (wait_result == THREAD_WAITING) { - alarm->al_time = *sleep_time; - alarm->al_status = ALARM_SLEEP; - post_alarm(clock, alarm); - UNLOCK_CLOCK(s); - - wait_result = thread_block(THREAD_CONTINUE_NULL); - - /* - * Note if alarm expired normally or whether it - * was aborted. If aborted, delete alarm from - * clock alarm list. Return alarm to free list. - */ - LOCK_CLOCK(s); - if (alarm->al_status != ALARM_DONE) { - assert(wait_result != THREAD_AWAKENED); - if (((alarm->al_prev)->al_next = alarm->al_next) != NULL) - (alarm->al_next)->al_prev = alarm->al_prev; - rvalue = KERN_ABORTED; - } - *sleep_time = alarm->al_time; - alarm->al_status = ALARM_FREE; - } else { - assert(wait_result == THREAD_INTERRUPTED); - assert(alarm->al_status == ALARM_FREE); - rvalue = KERN_ABORTED; - } - alarm->al_next = alrmfree; - alrmfree = alarm; - UNLOCK_CLOCK(s); - } - else - *sleep_time = clock_time; + splx(s); - return (rvalue); + /* + * Send host notifications. + */ + host_notify_calendar_change(); } /* - * CLOCK INTERRUPT SERVICE ROUTINES. - */ - -/* - * Service clock alarm interrupts. Called from machine dependent - * layer at splclock(). The clock_id argument specifies the clock, - * and the clock_time argument gives that clock's current time. + * clock_initialize_calendar: + * + * Set the calendar and related clocks + * from the platform clock at boot or + * wake event. + * + * Also sends host notifications. */ void -clock_alarm_intr( - clock_id_t clock_id, - mach_timespec_t *clock_time) +clock_initialize_calendar(void) { - clock_t clock; - register alarm_t alrm1; - register alarm_t alrm2; - mach_timespec_t *alarm_time; - spl_t s; + uint32_t sys, microsys; + uint32_t microsecs = 0, secs = PEGetGMTTimeOfDay(); + spl_t s; - clock = &clock_list[clock_id]; + s = splclock(); + simple_lock(&clock_lock); - /* - * Update clock alarm list. All alarms that are due are moved - * to the alarmdone list to be serviced by the alarm_thread. - */ + commpage_set_timestamp(0,0,0); - LOCK_CLOCK(s); - alrm1 = (alarm_t) &clock->cl_alarm; - while ((alrm2 = alrm1->al_next) != NULL) { - alarm_time = &alrm2->al_time; - if (CMP_MACH_TIMESPEC(alarm_time, clock_time) > 0) - break; + if ((int32_t)secs >= (int32_t)clock_boottime) { + /* + * Initialize the boot time based on the platform clock. + */ + if (clock_boottime == 0) + clock_boottime = secs; /* - * Alarm has expired, so remove it from the - * clock alarm list. - */ - if ((alrm1->al_next = alrm2->al_next) != NULL) - (alrm1->al_next)->al_prev = alrm1; + * Calculate the new calendar epoch based on + * the platform clock and the system clock. + */ + clock_get_system_microtime(&sys, µsys); + TIME_SUB(secs, sys, microsecs, microsys, USEC_PER_SEC); /* - * If a clock_sleep() alarm, wakeup the thread - * which issued the clock_sleep() call. + * Set the new calendar epoch. */ - if (alrm2->al_status == ALARM_SLEEP) { - alrm2->al_next = 0; - alrm2->al_status = ALARM_DONE; - alrm2->al_time = *clock_time; - thread_wakeup((event_t)alrm2); - } + clock_calend.epoch = secs; + nanoseconds_to_absolutetime((uint64_t)microsecs * NSEC_PER_USEC, &clock_calend.offset); - /* - * If a clock_alarm() alarm, place the alarm on - * the alarm done list and schedule the alarm - * delivery mechanism. + /* + * Cancel any adjustment in progress. */ - else { - assert(alrm2->al_status == ALARM_CLOCK); - if ((alrm2->al_next = alrmdone) != NULL) - alrmdone->al_prev = alrm2; - else - thread_call_enter(&alarm_deliver); - alrm2->al_prev = (alarm_t) &alrmdone; - alrmdone = alrm2; - alrm2->al_status = ALARM_DONE; - alrm2->al_time = *clock_time; - } + calend_adjdelta = calend_adjtotal = 0; } + simple_unlock(&clock_lock); + splx(s); + /* - * Setup the clock dependent layer to deliver another - * interrupt for the next pending alarm. + * Send host notifications. */ - if (alrm2) - (*clock->cl_ops->c_setalrm)(alarm_time); - UNLOCK_CLOCK(s); + host_notify_calendar_change(); } /* - * ALARM DELIVERY ROUTINES. + * clock_get_boottime_nanotime: + * + * Return the boottime, used by sysctl. */ - -static void -clock_alarm_deliver( - __unused thread_call_param_t p0, - __unused thread_call_param_t p1) +void +clock_get_boottime_nanotime( + uint32_t *secs, + uint32_t *nanosecs) { - register alarm_t alrm; - kern_return_t code; - spl_t s; - - LOCK_CLOCK(s); - while ((alrm = alrmdone) != NULL) { - if ((alrmdone = alrm->al_next) != NULL) - alrmdone->al_prev = (alarm_t) &alrmdone; - UNLOCK_CLOCK(s); - - code = (alrm->al_status == ALARM_DONE? KERN_SUCCESS: KERN_ABORTED); - if (alrm->al_port != IP_NULL) { - /* Deliver message to designated port */ - if (IP_VALID(alrm->al_port)) { - clock_alarm_reply(alrm->al_port, alrm->al_port_type, code, - alrm->al_type, alrm->al_time); - } - - LOCK_CLOCK(s); - alrm->al_status = ALARM_FREE; - alrm->al_next = alrmfree; - alrmfree = alrm; - } - else - panic("clock_alarm_deliver"); - } - - UNLOCK_CLOCK(s); + *secs = clock_boottime; + *nanosecs = 0; } /* - * CLOCK PRIVATE SERVICING SUBROUTINES. - */ - -/* - * Flush all pending alarms on a clock. All alarms - * are activated and timestamped correctly, so any - * programs waiting on alarms/threads will proceed - * with accurate information. + * clock_adjtime: + * + * Interface to adjtime() syscall. + * + * Calculates adjustment variables and + * initiates adjustment. */ -static void -flush_alarms( - clock_t clock) +clock_adjtime( + int32_t *secs, + int32_t *microsecs) { - register alarm_t alrm1, alrm2; - spl_t s; + uint32_t interval; + spl_t s; - /* - * Flush all outstanding alarms. - */ - LOCK_CLOCK(s); - alrm1 = (alarm_t) &clock->cl_alarm; - while ((alrm2 = alrm1->al_next) != NULL) { - /* - * Remove alarm from the clock alarm list. - */ - if ((alrm1->al_next = alrm2->al_next) != NULL) - (alrm1->al_next)->al_prev = alrm1; + s = splclock(); + simple_lock(&clock_lock); - /* - * If a clock_sleep() alarm, wakeup the thread - * which issued the clock_sleep() call. - */ - if (alrm2->al_status == ALARM_SLEEP) { - alrm2->al_next = 0; - thread_wakeup((event_t)alrm2); - } - else { - /* - * If a clock_alarm() alarm, place the alarm on - * the alarm done list and wakeup the dedicated - * kernel alarm_thread to service the alarm. - */ - assert(alrm2->al_status == ALARM_CLOCK); - if ((alrm2->al_next = alrmdone) != NULL) - alrmdone->al_prev = alrm2; - else - thread_wakeup((event_t)&alrmdone); - alrm2->al_prev = (alarm_t) &alrmdone; - alrmdone = alrm2; - } + interval = calend_set_adjustment(secs, microsecs); + if (interval != 0) { + calend_adjdeadline = mach_absolute_time() + interval; + if (!timer_call_enter(&calend_adjcall, calend_adjdeadline)) + calend_adjactive++; } - UNLOCK_CLOCK(s); + else + if (timer_call_cancel(&calend_adjcall)) + calend_adjactive--; + + simple_unlock(&clock_lock); + splx(s); } -/* - * Post an alarm on a clock's active alarm list. The alarm is - * inserted in time-order into the clock's active alarm list. - * Always called from within a LOCK_CLOCK() code section. - */ -static -void -post_alarm( - clock_t clock, - alarm_t alarm) +static uint32_t +calend_set_adjustment( + int32_t *secs, + int32_t *microsecs) { - register alarm_t alrm1, alrm2; - mach_timespec_t *alarm_time; - mach_timespec_t *queue_time; + uint64_t now, t64; + int64_t total, ototal; + uint32_t interval = 0; - /* - * Traverse alarm list until queue time is greater - * than alarm time, then insert alarm. - */ - alarm_time = &alarm->al_time; - alrm1 = (alarm_t) &clock->cl_alarm; - while ((alrm2 = alrm1->al_next) != NULL) { - queue_time = &alrm2->al_time; - if (CMP_MACH_TIMESPEC(queue_time, alarm_time) > 0) - break; - alrm1 = alrm2; - } - alrm1->al_next = alarm; - alarm->al_next = alrm2; - alarm->al_prev = alrm1; - if (alrm2) - alrm2->al_prev = alarm; + total = (int64_t)*secs * NSEC_PER_SEC + *microsecs * NSEC_PER_USEC; - /* - * If the inserted alarm is the 'earliest' alarm, - * reset the device layer alarm time accordingly. - */ - if (clock->cl_alarm.al_next == alarm) - (*clock->cl_ops->c_setalrm)(alarm_time); -} + commpage_set_timestamp(0,0,0); -/* - * Check the validity of 'alarm_time' and 'alarm_type'. If either - * argument is invalid, return a negative value. If the 'alarm_time' - * is now, return a 0 value. If the 'alarm_time' is in the future, - * return a positive value. - */ -static -int -check_time( - alarm_type_t alarm_type, - mach_timespec_t *alarm_time, - mach_timespec_t *clock_time) -{ - int result; + now = mach_absolute_time(); - if (BAD_ALRMTYPE(alarm_type)) - return (-1); - if (BAD_MACH_TIMESPEC(alarm_time)) - return (-1); - if ((alarm_type & ALRMTYPE) == TIME_RELATIVE) - ADD_MACH_TIMESPEC(alarm_time, clock_time); + ototal = calend_adjtotal; - result = CMP_MACH_TIMESPEC(alarm_time, clock_time); + if (total != 0) { + int32_t delta = calend_adjskew; - return ((result >= 0)? result: 0); -} + if (total > 0) { + if (total > calend_adjbig) + delta *= 10; + if (delta > total) + delta = total; -mach_timespec_t -clock_get_system_value(void) -{ - clock_t clock = &clock_list[SYSTEM_CLOCK]; - mach_timespec_t value; + nanoseconds_to_absolutetime((uint64_t)delta, &t64); + calend_adjoffset = t64; + } + else { + if (total < -calend_adjbig) + delta *= 10; + delta = -delta; + if (delta < total) + delta = total; - (void) (*clock->cl_ops->c_gettime)(&value); + calend_adjstart = now; - return value; -} + nanoseconds_to_absolutetime((uint64_t)-delta, &t64); + calend_adjoffset = t64; + } -mach_timespec_t -clock_get_calendar_value(void) -{ - clock_t clock = &clock_list[CALENDAR_CLOCK]; - mach_timespec_t value = MACH_TIMESPEC_ZERO; + calend_adjtotal = total; + calend_adjdelta = delta; + + interval = calend_adjinterval; + } + else + calend_adjdelta = calend_adjtotal = 0; - (void) (*clock->cl_ops->c_gettime)(&value); + if (ototal != 0) { + *secs = ototal / NSEC_PER_SEC; + *microsecs = (ototal % NSEC_PER_SEC) / NSEC_PER_USEC; + } + else + *secs = *microsecs = 0; - return value; + return (interval); } -void -clock_deadline_for_periodic_event( - uint64_t interval, - uint64_t abstime, - uint64_t *deadline) +static void +calend_adjust_call(void) { - assert(interval != 0); + uint32_t interval; + spl_t s; - *deadline += interval; + s = splclock(); + simple_lock(&clock_lock); - if (*deadline <= abstime) { - *deadline = abstime + interval; - abstime = mach_absolute_time(); + if (--calend_adjactive == 0) { + interval = calend_adjust(); + if (interval != 0) { + clock_deadline_for_periodic_event(interval, mach_absolute_time(), + &calend_adjdeadline); - if (*deadline <= abstime) - *deadline = abstime + interval; + if (!timer_call_enter(&calend_adjcall, calend_adjdeadline)) + calend_adjactive++; + } } + + simple_unlock(&clock_lock); + splx(s); } -void -mk_timebase_info_trap( - struct mk_timebase_info_trap_args *args) +static uint32_t +calend_adjust(void) { - uint32_t *delta = args->delta; - uint32_t *abs_to_ns_numer = args->abs_to_ns_numer; - uint32_t *abs_to_ns_denom = args->abs_to_ns_denom; - uint32_t *proc_to_abs_numer = args->proc_to_abs_numer; - uint32_t *proc_to_abs_denom = args->proc_to_abs_denom; - mach_timebase_info_data_t info; - uint32_t one = 1; + uint64_t now, t64; + int32_t delta; + uint32_t interval = 0; - clock_timebase_info(&info); + commpage_set_timestamp(0,0,0); - copyout((void *)&one, CAST_USER_ADDR_T(delta), sizeof (uint32_t)); + now = mach_absolute_time(); - copyout((void *)&info.numer, CAST_USER_ADDR_T(abs_to_ns_numer), sizeof (uint32_t)); - copyout((void *)&info.denom, CAST_USER_ADDR_T(abs_to_ns_denom), sizeof (uint32_t)); + delta = calend_adjdelta; - copyout((void *)&one, CAST_USER_ADDR_T(proc_to_abs_numer), sizeof (uint32_t)); - copyout((void *)&one, CAST_USER_ADDR_T(proc_to_abs_denom), sizeof (uint32_t)); -} + if (delta > 0) { + clock_calend.offset += calend_adjoffset; -kern_return_t -mach_timebase_info_trap( - struct mach_timebase_info_trap_args *args) -{ - mach_vm_address_t out_info_addr = args->info; - mach_timebase_info_data_t info; + calend_adjtotal -= delta; + if (delta > calend_adjtotal) { + calend_adjdelta = delta = calend_adjtotal; - clock_timebase_info(&info); + nanoseconds_to_absolutetime((uint64_t)delta, &t64); + calend_adjoffset = t64; + } + } + else + if (delta < 0) { + clock_calend.offset -= calend_adjoffset; - copyout((void *)&info, out_info_addr, sizeof (info)); + calend_adjtotal -= delta; + if (delta < calend_adjtotal) { + calend_adjdelta = delta = calend_adjtotal; - return (KERN_SUCCESS); + nanoseconds_to_absolutetime((uint64_t)-delta, &t64); + calend_adjoffset = t64; + } + + if (calend_adjdelta != 0) + calend_adjstart = now; + } + + if (calend_adjdelta != 0) + interval = calend_adjinterval; + + return (interval); +} + +/* + * clock_wakeup_calendar: + * + * Interface to power management, used + * to initiate the reset of the calendar + * on wake from sleep event. + */ +void +clock_wakeup_calendar(void) +{ + thread_call_enter(&calend_wakecall); } +/* + * Wait / delay routines. + */ static void mach_wait_until_continue( __unused void *parameter, @@ -895,9 +665,6 @@ mach_wait_until_trap( return ((wresult == THREAD_INTERRUPTED)? KERN_ABORTED: KERN_SUCCESS); } -/* - * Delay primitives. - */ void clock_delay_until( uint64_t deadline) @@ -937,69 +704,52 @@ delay( delay_for_interval((usec < 0)? -usec: usec, NSEC_PER_USEC); } +/* + * Miscellaneous routines. + */ void -clock_adjtime( - int32_t *secs, - int32_t *microsecs) +clock_interval_to_deadline( + uint32_t interval, + uint32_t scale_factor, + uint64_t *result) { - uint32_t interval; - spl_t s; - - s = splclock(); - simple_lock(&calend_adjlock); - - interval = clock_set_calendar_adjtime(secs, microsecs); - if (interval != 0) { - if (calend_adjdeadline >= interval) - calend_adjdeadline -= interval; - clock_deadline_for_periodic_event(interval, mach_absolute_time(), - &calend_adjdeadline); + uint64_t abstime; - timer_call_enter(&calend_adjcall, calend_adjdeadline); - } - else - timer_call_cancel(&calend_adjcall); + clock_interval_to_absolutetime_interval(interval, scale_factor, &abstime); - simple_unlock(&calend_adjlock); - splx(s); + *result = mach_absolute_time() + abstime; } -static void -calend_adjust_call( - __unused timer_call_param_t p0, - __unused timer_call_param_t p1) +void +clock_absolutetime_interval_to_deadline( + uint64_t abstime, + uint64_t *result) { - uint32_t interval; - spl_t s; - - s = splclock(); - simple_lock(&calend_adjlock); - - interval = clock_adjust_calendar(); - if (interval != 0) { - clock_deadline_for_periodic_event(interval, mach_absolute_time(), - &calend_adjdeadline); - - timer_call_enter(&calend_adjcall, calend_adjdeadline); - } - - simple_unlock(&calend_adjlock); - splx(s); + *result = mach_absolute_time() + abstime; } void -clock_wakeup_calendar(void) +clock_get_uptime( + uint64_t *result) { - thread_call_enter(&calend_wakecall); + *result = mach_absolute_time(); } -extern void IOKitResetTime(void); /* XXX */ - -static void -calend_dowakeup( - __unused thread_call_param_t p0, - __unused thread_call_param_t p1) +void +clock_deadline_for_periodic_event( + uint64_t interval, + uint64_t abstime, + uint64_t *deadline) { + assert(interval != 0); + + *deadline += interval; + + if (*deadline <= abstime) { + *deadline = abstime + interval; + abstime = mach_absolute_time(); - IOKitResetTime(); + if (*deadline <= abstime) + *deadline = abstime + interval; + } }