X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/a3d08fcd5120d2aa8303b6349ca8b14e3f284af3..2d21ac55c334faf3a56e5634905ed6987fc787d4:/osfmk/kern/machine.c diff --git a/osfmk/kern/machine.c b/osfmk/kern/machine.c index f8e7b652c..1e7d3e96f 100644 --- a/osfmk/kern/machine.c +++ b/osfmk/kern/machine.c @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2007 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -57,101 +63,69 @@ * Support for machine independent machine abstraction. */ -#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 -#include +#if HIBERNATION +#include +#endif +#include /* * Exported variables: */ struct machine_info machine_info; -struct machine_slot machine_slot[NCPUS]; - -thread_t machine_wake_thread; /* Forwards */ void processor_doshutdown( processor_t processor); /* - * cpu_up: + * processor_up: * - * Flag specified cpu as up and running. Called when a processor comes - * online. + * Flag processor as up and running, and available + * for scheduling. */ void -cpu_up( - int cpu) +processor_up( + processor_t processor) { - processor_t processor = cpu_to_processor(cpu); - processor_set_t pset = &default_pset; - struct machine_slot *ms; - spl_t s; + processor_set_t pset; + spl_t s; s = splsched(); - processor_lock(processor); init_ast_check(processor); - ms = &machine_slot[cpu]; - ms->running = TRUE; - machine_info.avail_cpus++; - simple_lock(&pset->sched_lock); - pset_add_processor(pset, processor); - enqueue_tail(&pset->active_queue, (queue_entry_t)processor); - processor->deadline = UINT64_MAX; + pset = processor->processor_set; + pset_lock(pset); + pset->processor_count++; + enqueue_head(&pset->active_queue, (queue_entry_t)processor); processor->state = PROCESSOR_RUNNING; - simple_unlock(&pset->sched_lock); - processor_unlock(processor); - splx(s); -} - -/* - * cpu_down: - * - * Flag specified cpu as down. Called when a processor is about to - * go offline. - */ -void -cpu_down( - int cpu) -{ - processor_t processor; - struct machine_slot *ms; - spl_t s; - - processor = cpu_to_processor(cpu); - - s = splsched(); - processor_lock(processor); - ms = &machine_slot[cpu]; - ms->running = FALSE; - machine_info.avail_cpus--; - /* - * processor has already been removed from pset. - */ - processor->state = PROCESSOR_OFF_LINE; - processor_unlock(processor); + (void)hw_atomic_add(&processor_avail_count, 1); + pset_unlock(pset); + ml_cpu_up(); splx(s); } @@ -170,20 +144,22 @@ host_reboot( return (KERN_SUCCESS); } - halt_all_cpus(!(options & HOST_REBOOT_HALT)); + if (options & HOST_REBOOT_UPSDELAY) { + // UPS power cutoff path + PEHaltRestart( kPEUPSDelayHaltCPU ); + } else { + halt_all_cpus(!(options & HOST_REBOOT_HALT)); + } return (KERN_SUCCESS); } kern_return_t processor_assign( - processor_t processor, - processor_set_t new_pset, - boolean_t wait) + __unused processor_t processor, + __unused processor_set_t new_pset, + __unused boolean_t wait) { -#ifdef lint - processor++; new_pset++; wait++; -#endif /* lint */ return (KERN_FAILURE); } @@ -195,13 +171,13 @@ processor_shutdown( spl_t s; s = splsched(); - processor_lock(processor); - if ( processor->state == PROCESSOR_OFF_LINE || - processor->state == PROCESSOR_SHUTDOWN ) { + pset = processor->processor_set; + pset_lock(pset); + if (processor->state == PROCESSOR_OFF_LINE) { /* - * Success if already shutdown or being shutdown. + * Success if already shutdown. */ - processor_unlock(processor); + pset_unlock(pset); splx(s); return (KERN_SUCCESS); @@ -211,27 +187,29 @@ processor_shutdown( /* * Failure if currently being started. */ - processor_unlock(processor); + pset_unlock(pset); splx(s); return (KERN_FAILURE); } /* - * Processor must be in a processor set. Must lock the scheduling - * lock to get at the processor state. + * If the processor is dispatching, let it finish. */ - pset = processor->processor_set; - simple_lock(&pset->sched_lock); + while (processor->state == PROCESSOR_DISPATCHING) { + pset_unlock(pset); + delay(1); + pset_lock(pset); + } /* - * If the processor is dispatching, let it finish - it will set its - * state to running very soon. + * Success if already being shutdown. */ - while (*(volatile int *)&processor->state == PROCESSOR_DISPATCHING) { - simple_unlock(&pset->sched_lock); - delay(1); - simple_lock(&pset->sched_lock); + if (processor->state == PROCESSOR_SHUTDOWN) { + pset_unlock(pset); + splx(s); + + return (KERN_SUCCESS); } if (processor->state == PROCESSOR_IDLE) { @@ -242,20 +220,16 @@ processor_shutdown( if (processor->state == PROCESSOR_RUNNING) remqueue(&pset->active_queue, (queue_entry_t)processor); else - panic("processor_request_action"); + panic("processor_shutdown"); processor->state = PROCESSOR_SHUTDOWN; - simple_unlock(&pset->sched_lock); - - processor_unlock(processor); + pset_unlock(pset); processor_doshutdown(processor); splx(s); -#ifdef __ppc__ - cpu_exit_wait(processor->slot_num); -#endif + cpu_exit_wait(PROCESSOR_DATA(processor, slot_num)); return (KERN_SUCCESS); } @@ -268,84 +242,90 @@ processor_doshutdown( processor_t processor) { thread_t old_thread, self = current_thread(); - processor_set_t pset; processor_t prev; /* * Get onto the processor to shutdown */ - prev = thread_bind(self, processor); + prev = thread_bind(processor); thread_block(THREAD_CONTINUE_NULL); - processor_lock(processor); - pset = processor->processor_set; - simple_lock(&pset->sched_lock); - - if (pset->processor_count == 1) { - thread_t thread; - extern void start_cpu_thread(void); - - simple_unlock(&pset->sched_lock); - processor_unlock(processor); - - /* - * Create the thread, and point it at the routine. - */ - thread = kernel_thread_create(start_cpu_thread, MAXPRI_KERNEL); +#if HIBERNATION + if (processor_avail_count < 2) + hibernate_vm_lock(); +#endif - thread_lock(thread); - machine_wake_thread = thread; - thread->state = TH_RUN; - pset_run_incr(thread->processor_set); - thread_unlock(thread); + assert(processor->state == PROCESSOR_SHUTDOWN); - processor_lock(processor); - simple_lock(&pset->sched_lock); - } +#if HIBERNATION + if (processor_avail_count < 2) + hibernate_vm_unlock(); +#endif - assert(processor->state == PROCESSOR_SHUTDOWN); + /* + * Continue processor shutdown in shutdown context. + */ + thread_bind(prev); + old_thread = machine_processor_shutdown(self, processor_offline, processor); - pset_remove_processor(pset, processor); - simple_unlock(&pset->sched_lock); - processor_unlock(processor); + thread_dispatch(old_thread, self); /* - * Clean up. + * If we just shutdown another processor, move any + * threads and timer call outs to the current processor. */ - thread_bind(self, prev); - old_thread = switch_to_shutdown_context(self, - processor_offline, processor); - if (processor != current_processor()) - timer_call_shutdown(processor); + if (processor != current_processor()) { + processor_set_t pset = processor->processor_set; - _mk_sp_thread_begin(self, self->last_processor); + pset_lock(pset); - thread_dispatch(old_thread); + if (processor->state == PROCESSOR_OFF_LINE || processor->state == PROCESSOR_SHUTDOWN) { + timer_call_shutdown(processor); + processor_queue_shutdown(processor); + return; + } + + pset_unlock(pset); + } } /* - * Actually do the processor shutdown. This is called at splsched, - * running on the processor's shutdown stack. + * Complete the shutdown and place the processor offline. + * + * Called at splsched in the shutdown context. */ - void processor_offline( - processor_t processor) + processor_t processor) { - register thread_t old_thread = processor->active_thread; - register int cpu = processor->slot_num; + thread_t new_thread, old_thread = processor->active_thread; + processor_set_t pset; - timer_call_cancel(&processor->quantum_timer); - timer_switch(&kernel_timer[cpu]); - processor->active_thread = processor->idle_thread; - machine_thread_set_current(processor->active_thread); - thread_dispatch(old_thread); + new_thread = processor->idle_thread; + processor->active_thread = new_thread; + processor->current_pri = IDLEPRI; + processor->deadline = UINT64_MAX; + new_thread->last_processor = processor; + + processor->last_dispatch = mach_absolute_time(); + timer_stop(PROCESSOR_DATA(processor, thread_timer), processor->last_dispatch); + + machine_set_current_thread(new_thread); + + thread_dispatch(old_thread, new_thread); + + PMAP_DEACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num)); + + pset = processor->processor_set; + pset_lock(pset); + pset->processor_count--; + processor->state = PROCESSOR_OFF_LINE; + if (processor == pset->low_hint) + pset->low_hint = PROCESSOR_NULL; + (void)hw_atomic_sub(&processor_avail_count, 1); + pset_unlock(pset); + ml_cpu_down(); - /* - * OK, now exit this cpu. - */ - PMAP_DEACTIVATE_KERNEL(cpu); - cpu_down(cpu); cpu_sleep(); panic("zombie processor"); /*NOTREACHED*/ @@ -356,11 +336,7 @@ host_get_boot_info( host_priv_t host_priv, kernel_boot_info_t boot_info) { - char *src = ""; - extern char *machine_boot_info( - kernel_boot_info_t boot_info, - vm_size_t buf_len); - + const char *src = ""; if (host_priv == HOST_PRIV_NULL) return (KERN_INVALID_HOST);