/* * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_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 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@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * processor.h: Processor and processor-related definitions. */ #ifndef _KERN_PROCESSOR_H_ #define _KERN_PROCESSOR_H_ #include <mach/boolean.h> #include <mach/kern_return.h> #include <kern/kern_types.h> #include <sys/cdefs.h> #ifdef MACH_KERNEL_PRIVATE #include <mach/mach_types.h> #include <kern/ast.h> #include <kern/cpu_number.h> #include <kern/lock.h> #include <kern/queue.h> #include <kern/sched.h> #include <kern/processor_data.h> #include <machine/ast_types.h> struct processor_set { queue_head_t idle_queue; /* idle processors */ int idle_count; /* how many ? */ queue_head_t active_queue; /* active processors */ queue_head_t processors; /* all processors here */ int processor_count;/* how many ? */ decl_simple_lock_data(,sched_lock) /* lock for runq and above */ struct run_queue runq; /* runq for this set */ queue_head_t tasks; /* tasks assigned */ int task_count; /* how many */ queue_head_t threads; /* threads in this set */ int thread_count; /* how many */ int ref_count; /* structure ref count */ boolean_t active; /* is pset in use */ decl_mutex_data(, lock) /* lock for above */ int timeshare_quanta; /* timeshare quantum factor */ struct ipc_port * pset_self; /* port for operations */ struct ipc_port * pset_name_self; /* port for information */ uint32_t run_count; /* threads running in set */ uint32_t share_count; /* timeshare threads running in set */ integer_t mach_factor; /* mach_factor */ integer_t load_average; /* load_average */ uint32_t pri_shift; /* timeshare usage -> priority */ }; extern struct processor_set default_pset; struct processor { queue_chain_t processor_queue;/* idle/active queue link, * MUST remain the first element */ int state; /* See below */ struct thread *active_thread, /* thread running on processor */ *next_thread, /* next thread when dispatched */ *idle_thread; /* this processor's idle thread. */ processor_set_t processor_set; /* current membership */ int current_pri; /* priority of current thread */ timer_call_data_t quantum_timer; /* timer for quantum expiration */ uint64_t quantum_end; /* time when current quantum ends */ uint64_t last_dispatch; /* time of last dispatch */ int timeslice; /* quanta before timeslice ends */ uint64_t deadline; /* current deadline */ struct run_queue runq; /* local runq for this processor */ queue_chain_t processors; /* processors in set */ decl_simple_lock_data(,lock) struct ipc_port * processor_self; /* port for operations */ processor_t processor_list; /* all existing processors */ processor_data_t processor_data; /* per-processor data */ }; extern processor_t processor_list; extern unsigned int processor_count; decl_simple_lock_data(extern,processor_list_lock) extern processor_t master_processor; /* * NOTE: The processor->processor_set link is needed in one of the * scheduler's critical paths. [Figure out where to look for another * thread to run on this processor.] It is accessed without locking. * The following access protocol controls this field. * * Read from own processor - just read. * Read from another processor - lock processor structure during read. * Write from own processor - lock processor structure during write. * Write from another processor - NOT PERMITTED. * */ /* * Processor state locking: * * Values for the processor state are defined below. If the processor * is off-line or being shutdown, then it is only necessary to lock * the processor to change its state. Otherwise it is only necessary * to lock its processor set's sched_lock. Scheduler code will * typically lock only the sched_lock, but processor manipulation code * will often lock both. */ #define PROCESSOR_OFF_LINE 0 /* Not available */ #define PROCESSOR_RUNNING 1 /* Normal execution */ #define PROCESSOR_IDLE 2 /* Idle */ #define PROCESSOR_DISPATCHING 3 /* Dispatching (idle -> running) */ #define PROCESSOR_SHUTDOWN 4 /* Going off-line */ #define PROCESSOR_START 5 /* Being started */ extern processor_t current_processor(void); extern processor_t cpu_to_processor( int cpu); /* Useful lock macros */ #define pset_lock(pset) mutex_lock(&(pset)->lock) #define pset_lock_try(pset) mutex_try(&(pset)->lock) #define pset_unlock(pset) mutex_unlock(&(pset)->lock) #define processor_lock(pr) simple_lock(&(pr)->lock) #define processor_unlock(pr) simple_unlock(&(pr)->lock) extern void processor_bootstrap(void); extern void processor_init( processor_t processor, int slot_num); extern void timeshare_quanta_update( processor_set_t pset); extern void pset_init( processor_set_t pset); #define pset_run_incr(pset) \ hw_atomic_add(&(pset)->run_count, 1) #define pset_run_decr(pset) \ hw_atomic_sub(&(pset)->run_count, 1) #define pset_share_incr(pset) \ hw_atomic_add(&(pset)->share_count, 1) #define pset_share_decr(pset) \ hw_atomic_sub(&(pset)->share_count, 1) extern kern_return_t processor_shutdown( processor_t processor); extern void pset_remove_processor( processor_set_t pset, processor_t processor); extern void pset_add_processor( processor_set_t pset, processor_t processor); extern void pset_remove_task( processor_set_t pset, task_t task); extern void pset_add_task( processor_set_t pset, task_t task); extern void pset_remove_thread( processor_set_t pset, thread_t thread); extern void pset_add_thread( processor_set_t pset, thread_t thread); extern void thread_change_psets( thread_t thread, processor_set_t old_pset, processor_set_t new_pset); extern kern_return_t processor_info_count( processor_flavor_t flavor, mach_msg_type_number_t *count); #endif /* MACH_KERNEL_PRIVATE */ __BEGIN_DECLS extern void pset_deallocate( processor_set_t pset); extern void pset_reference( processor_set_t pset); __END_DECLS #endif /* _KERN_PROCESSOR_H_ */