/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_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 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.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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.
+ *
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* Support for machine independent machine abstraction.
*/
-#include <cpus.h>
-
#include <string.h>
+
+#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <mach/kern_return.h>
-#include <mach/mach_types.h>
#include <mach/machine.h>
#include <mach/host_info.h>
#include <mach/host_reboot.h>
+#include <mach/host_priv_server.h>
+#include <mach/processor_server.h>
+
+#include <kern/kern_types.h>
#include <kern/counters.h>
#include <kern/cpu_data.h>
#include <kern/ipc_host.h>
#include <kern/host.h>
#include <kern/lock.h>
#include <kern/machine.h>
+#include <kern/misc_protos.h>
#include <kern/processor.h>
#include <kern/queue.h>
#include <kern/sched.h>
#include <kern/task.h>
#include <kern/thread.h>
-#include <kern/thread_swap.h>
-#include <kern/misc_protos.h>
-#include <kern/mk_sp.h>
+#include <IOKit/IOHibernatePrivate.h>
/*
* Exported variables:
*/
struct machine_info machine_info;
-struct machine_slot machine_slot[NCPUS];
-
-static queue_head_t processor_action_queue;
-static boolean_t processor_action_active;
-static thread_call_t processor_action_call;
-static thread_call_data_t processor_action_call_data;
-decl_simple_lock_data(static,processor_action_lock)
-
-thread_t machine_wake_thread;
/* Forwards */
-processor_set_t processor_request_action(
- processor_t processor,
- processor_set_t new_pset);
-
-void processor_doaction(
- processor_t processor);
-
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;
-
- /*
- * Just twiddle our thumbs; we've got nothing better to do
- * yet, anyway.
- */
- while (!simple_lock_try(&pset->processors_lock))
- continue;
+ processor_set_t pset = &default_pset;
+ spl_t s;
s = splsched();
processor_lock(processor);
init_ast_check(processor);
- ms = &machine_slot[cpu];
- ms->running = TRUE;
- machine_info.avail_cpus++;
- pset_add_processor(pset, processor);
simple_lock(&pset->sched_lock);
+ pset_add_processor(pset, processor);
enqueue_tail(&pset->active_queue, (queue_entry_t)processor);
processor->state = PROCESSOR_RUNNING;
simple_unlock(&pset->sched_lock);
- processor_unlock(processor);
- splx(s);
-
- simple_unlock(&pset->processors_lock);
-}
-
-/*
- * 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->processor_set_next = PROCESSOR_SET_NULL;
- processor->state = PROCESSOR_OFF_LINE;
+ hw_atomic_add(&machine_info.avail_cpus, 1);
+ ml_cpu_up();
processor_unlock(processor);
splx(s);
}
kern_return_t
host_reboot(
- host_priv_t host_priv,
+ host_priv_t host_priv,
int options)
{
if (host_priv == HOST_PRIV_NULL)
if (options & HOST_REBOOT_DEBUGGER) {
Debugger("Debugger");
+ return (KERN_SUCCESS);
}
- else
- halt_all_cpus(!(options & HOST_REBOOT_HALT));
-
- return (KERN_SUCCESS);
-}
-
-/*
- * processor_request_action:
- *
- * Common internals of processor_assign and processor_shutdown.
- * If new_pset is null, this is a shutdown, else it's an assign
- * and caller must donate a reference.
- * For assign operations, it returns an old pset that must be deallocated
- * if it's not NULL.
- * For shutdown operations, it always returns PROCESSOR_SET_NULL.
- */
-processor_set_t
-processor_request_action(
- processor_t processor,
- processor_set_t new_pset)
-{
- processor_set_t pset, old_pset;
-
- /*
- * Processor must be in a processor set. Must lock its idle lock to
- * get at processor state.
- */
- pset = processor->processor_set;
- simple_lock(&pset->sched_lock);
-
- /*
- * If the processor is dispatching, let it finish - it will set its
- * state to running very soon.
- */
- while (*(volatile int *)&processor->state == PROCESSOR_DISPATCHING) {
- simple_unlock(&pset->sched_lock);
-
- simple_lock(&pset->sched_lock);
- }
-
- assert( processor->state == PROCESSOR_IDLE ||
- processor->state == PROCESSOR_RUNNING ||
- processor->state == PROCESSOR_ASSIGN );
-
- /*
- * Now lock the action queue and do the dirty work.
- */
- simple_lock(&processor_action_lock);
-
- if (processor->state == PROCESSOR_IDLE) {
- remqueue(&pset->idle_queue, (queue_entry_t)processor);
- pset->idle_count--;
- }
- else
- if (processor->state == PROCESSOR_RUNNING)
- remqueue(&pset->active_queue, (queue_entry_t)processor);
-
- if (processor->state != PROCESSOR_ASSIGN)
- enqueue_tail(&processor_action_queue, (queue_entry_t)processor);
-
- /*
- * And ask the action_thread to do the work.
- */
- if (new_pset != PROCESSOR_SET_NULL) {
- processor->state = PROCESSOR_ASSIGN;
- old_pset = processor->processor_set_next;
- processor->processor_set_next = new_pset;
- }
- else {
- processor->state = PROCESSOR_SHUTDOWN;
- old_pset = PROCESSOR_SET_NULL;
- }
-
- simple_unlock(&pset->sched_lock);
-
- if (processor_action_active) {
- simple_unlock(&processor_action_lock);
-
- return (old_pset);
- }
-
- processor_action_active = TRUE;
- simple_unlock(&processor_action_lock);
- processor_unlock(processor);
+ halt_all_cpus(!(options & HOST_REBOOT_HALT));
- thread_call_enter(processor_action_call);
- processor_lock(processor);
-
- return (old_pset);
+ 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);
}
-/*
- * processor_shutdown() queues a processor up for shutdown.
- * Any assignment in progress is overriden.
- */
kern_return_t
processor_shutdown(
- processor_t processor)
+ processor_t processor)
{
- spl_t s;
+ processor_set_t pset;
+ spl_t s;
s = splsched();
processor_lock(processor);
- if ( processor->state == PROCESSOR_OFF_LINE ||
- processor->state == PROCESSOR_SHUTDOWN ) {
+ if (processor->state == PROCESSOR_OFF_LINE) {
/*
- * Already shutdown or being shutdown -- nothing to do.
+ * Success if already shutdown.
*/
processor_unlock(processor);
splx(s);
return (KERN_SUCCESS);
}
- processor_request_action(processor, PROCESSOR_SET_NULL);
-
- assert_wait((event_t)processor, THREAD_UNINT);
-
- processor_unlock(processor);
- splx(s);
+ if (processor->state == PROCESSOR_START) {
+ /*
+ * Failure if currently being started.
+ */
+ processor_unlock(processor);
+ splx(s);
- thread_block(THREAD_CONTINUE_NULL);
+ return (KERN_FAILURE);
+ }
- return (KERN_SUCCESS);
-}
+ /*
+ * Must lock the scheduling lock
+ * to get at the processor state.
+ */
+ pset = processor->processor_set;
+ if (pset != PROCESSOR_SET_NULL) {
+ simple_lock(&pset->sched_lock);
-/*
- * processor_action() shuts down processors or changes their assignment.
- */
-static void
-_processor_action(
- thread_call_param_t p0,
- thread_call_param_t p1)
-{
- register processor_t processor;
- spl_t s;
+ /*
+ * If the processor is dispatching, let it finish.
+ */
+ while (processor->state == PROCESSOR_DISPATCHING) {
+ simple_unlock(&pset->sched_lock);
+ delay(1);
+ simple_lock(&pset->sched_lock);
+ }
- s = splsched();
- simple_lock(&processor_action_lock);
+ /*
+ * Success if already being shutdown.
+ */
+ if (processor->state == PROCESSOR_SHUTDOWN) {
+ simple_unlock(&pset->sched_lock);
+ processor_unlock(processor);
+ splx(s);
- while (!queue_empty(&processor_action_queue)) {
- processor = (processor_t)dequeue_head(&processor_action_queue);
- simple_unlock(&processor_action_lock);
+ return (KERN_SUCCESS);
+ }
+ }
+ else {
+ /*
+ * Success, already being shutdown.
+ */
+ processor_unlock(processor);
splx(s);
- processor_doaction(processor);
+ return (KERN_SUCCESS);
+ }
- s = splsched();
- simple_lock(&processor_action_lock);
+ if (processor->state == PROCESSOR_IDLE) {
+ remqueue(&pset->idle_queue, (queue_entry_t)processor);
+ pset->idle_count--;
}
+ else
+ if (processor->state == PROCESSOR_RUNNING)
+ remqueue(&pset->active_queue, (queue_entry_t)processor);
+ else
+ panic("processor_shutdown");
+
+ processor->state = PROCESSOR_SHUTDOWN;
- processor_action_active = FALSE;
- simple_unlock(&processor_action_lock);
+ simple_unlock(&pset->sched_lock);
+
+ processor_unlock(processor);
+
+ processor_doshutdown(processor);
splx(s);
-}
-void
-processor_action(void)
-{
- queue_init(&processor_action_queue);
- simple_lock_init(&processor_action_lock, ETAP_THREAD_ACTION);
- processor_action_active = FALSE;
+ cpu_exit_wait(PROCESSOR_DATA(processor, slot_num));
- thread_call_setup(&processor_action_call_data, _processor_action, NULL);
- processor_action_call = &processor_action_call_data;
+ return (KERN_SUCCESS);
}
/*
- * processor_doaction actually does the shutdown. The trick here
- * is to schedule ourselves onto a cpu and then save our
- * context back into the runqs before taking out the cpu.
+ * Called at splsched.
*/
void
-processor_doaction(
- processor_t processor)
+processor_doshutdown(
+ processor_t processor)
{
- thread_t self = current_thread();
+ thread_t old_thread, self = current_thread();
processor_set_t pset;
- thread_t old_thread;
- spl_t s;
+ processor_t prev;
+ int pcount;
/*
* Get onto the processor to shutdown
*/
- thread_bind(self, processor);
+ prev = thread_bind(self, processor);
thread_block(THREAD_CONTINUE_NULL);
+ processor_lock(processor);
pset = processor->processor_set;
- simple_lock(&pset->processors_lock);
-
- if (pset->processor_count == 1) {
- thread_t thread;
- extern void start_cpu_thread(void);
+ simple_lock(&pset->sched_lock);
- simple_unlock(&pset->processors_lock);
+ if ((pcount = pset->processor_count) == 1) {
+ simple_unlock(&pset->sched_lock);
+ processor_unlock(processor);
- /*
- * Create the thread, and point it at the routine.
- */
- thread = kernel_thread_with_priority(
- kernel_task, MAXPRI_KERNEL,
- start_cpu_thread, TRUE, FALSE);
-
- disable_preemption();
-
- s = splsched();
- thread_lock(thread);
- machine_wake_thread = thread;
- thread_go_locked(thread, THREAD_AWAKENED);
- (void)rem_runq(thread);
- thread_unlock(thread);
- splx(s);
+ hibernate_vm_lock();
- simple_lock(&pset->processors_lock);
- enable_preemption();
+ processor_lock(processor);
+ simple_lock(&pset->sched_lock);
}
- s = splsched();
- processor_lock(processor);
-
- /*
- * Do shutdown, make sure we live when processor dies.
- */
- if (processor->state != PROCESSOR_SHUTDOWN) {
- panic("action_thread -- bad processor state");
- }
+ assert(processor->state == PROCESSOR_SHUTDOWN);
pset_remove_processor(pset, processor);
+ simple_unlock(&pset->sched_lock);
processor_unlock(processor);
- simple_unlock(&pset->processors_lock);
+
+ if (pcount == 1)
+ hibernate_vm_unlock();
/*
- * Clean up.
+ * Continue processor shutdown in shutdown context.
*/
- thread_bind(self, PROCESSOR_NULL);
- self->continuation = 0;
- old_thread = switch_to_shutdown_context(self,
- processor_doshutdown, processor);
- if (processor != current_processor())
- timer_call_shutdown(processor);
+ thread_bind(self, prev);
+ old_thread = machine_processor_shutdown(self, processor_offline, processor);
+
+ thread_begin(self, self->last_processor);
+
thread_dispatch(old_thread);
- thread_wakeup((event_t)processor);
- splx(s);
+
+ /*
+ * If we just shutdown another processor, move the
+ * timer call outs to the current processor.
+ */
+ if (processor != current_processor()) {
+ processor_lock(processor);
+ if ( processor->state == PROCESSOR_OFF_LINE ||
+ processor->state == PROCESSOR_SHUTDOWN )
+ timer_call_shutdown(processor);
+ processor_unlock(processor);
+ }
}
/*
- * 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_doshutdown(
+processor_offline(
processor_t processor)
{
- register int cpu = processor->slot_num;
+ thread_t thread, old_thread = processor->active_thread;
- timer_call_cancel(&processor->quantum_timer);
- thread_dispatch(current_thread());
- timer_switch(&kernel_timer[cpu]);
+ thread = processor->idle_thread;
+ processor->active_thread = thread;
+ processor->current_pri = IDLEPRI;
+
+ processor->last_dispatch = mach_absolute_time();
+ timer_switch((uint32_t)processor->last_dispatch,
+ &PROCESSOR_DATA(processor, offline_timer));
+
+ thread_done(old_thread, thread, processor);
+
+ machine_set_current_thread(thread);
+
+ thread_begin(thread, processor);
+
+ thread_dispatch(old_thread);
+
+ PMAP_DEACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num));
+
+ processor_lock(processor);
+ processor->state = PROCESSOR_OFF_LINE;
+ hw_atomic_sub(&machine_info.avail_cpus, 1);
+ ml_cpu_down();
+ processor_unlock(processor);
- /*
- * OK, now exit this cpu.
- */
- PMAP_DEACTIVATE_KERNEL(cpu);
- thread_machine_set_current(processor->idle_thread);
- cpu_down(cpu);
cpu_sleep();
panic("zombie processor");
/*NOTREACHED*/
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);
projects / apple / xnu.git / blobdiff