WebSVN – HelenOS-historic – Blame – /kernel/trunk/generic/src/proc/task.c

Rev	Author	Line No.	Line
1	jermar	1	/*
		2	* Copyright (C) 2001-2004 Jakub Jermar
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
973	palkovsky	29	#include <main/uinit.h>
1	jermar	30	#include <proc/thread.h>
		31	#include <proc/task.h>
703	jermar	32	#include <mm/as.h>
814	palkovsky	33	#include <mm/slab.h>
1	jermar	34
		35	#include <synch/spinlock.h>
		36	#include <arch.h>
		37	#include <panic.h>
788	jermar	38	#include <adt/list.h>
955	palkovsky	39	#include <ipc/ipc.h>
		40	#include <memstr.h>
1060	palkovsky	41	#include <print.h>
1	jermar	42
973	palkovsky	43	#include <elf.h>
		44
623	jermar	45	SPINLOCK_INITIALIZE(tasks_lock);
624	jermar	46	LIST_INITIALIZE(tasks_head);
1005	palkovsky	47	static task_id_t task_counter = 0;
1	jermar	48
107	decky	49	/** Initialize tasks
		50	*
		51	* Initialize kernel tasks support.
		52	*
		53	*/
1	jermar	54	void task_init(void)
		55	{
15	jermar	56	TASK = NULL;
1	jermar	57	}
		58
107	decky	59
		60	/** Create new task
		61	*
		62	* Create new task with no threads.
		63	*
703	jermar	64	* @param as Task's address space.
107	decky	65	*
973	palkovsky	66	* @return New task's structure
107	decky	67	*
		68	*/
703	jermar	69	task_t task_create(as_t as)
1	jermar	70	{
413	jermar	71	ipl_t ipl;
1	jermar	72	task_t *ta;
1040	palkovsky	73	int i;
1	jermar	74
822	palkovsky	75	ta = (task_t *) malloc(sizeof(task_t), 0);
		76
		77	spinlock_initialize(&ta->lock, "task_ta_lock");
		78	list_initialize(&ta->th_head);
		79	list_initialize(&ta->tasks_link);
		80	ta->as = as;
955	palkovsky	81
1040	palkovsky	82
955	palkovsky	83	ipc_answerbox_init(&ta->answerbox);
1040	palkovsky	84	for (i=0; i < IPC_MAX_PHONES;i++)
		85	ipc_phone_init(&ta->phones[i]);
965	palkovsky	86	if (ipc_phone_0)
1040	palkovsky	87	ipc_phone_connect(&ta->phones[0], ipc_phone_0);
998	palkovsky	88	atomic_set(&ta->active_calls, 0);
822	palkovsky	89
		90	ipl = interrupts_disable();
		91	spinlock_lock(&tasks_lock);
1005	palkovsky	92
		93	ta->taskid = ++task_counter;
822	palkovsky	94	list_append(&ta->tasks_link, &tasks_head);
1005	palkovsky	95
822	palkovsky	96	spinlock_unlock(&tasks_lock);
		97	interrupts_restore(ipl);
		98
1	jermar	99	return ta;
		100	}
		101
973	palkovsky	102	/** Create new task with 1 thread and run it
		103	*
		104	* @return Task of the running program or NULL on error
		105	*/
		106	task_t * task_run_program(void *program_addr)
		107	{
		108	as_t *as;
		109	as_area_t *a;
		110	int rc;
		111	thread_t *t;
		112	task_t *task;
		113
		114	as = as_create(0);
		115
1025	palkovsky	116	rc = elf_load((elf_header_t *) program_addr, as);
973	palkovsky	117	if (rc != EE_OK) {
		118	as_free(as);
		119	return NULL;
		120	}
		121
		122	task = task_create(as);
1025	palkovsky	123	t = thread_create(uinit, (void )((elf_header_t )program_addr)->e_entry,
973	palkovsky	124	task, THREAD_USER_STACK);
		125
		126	/*
		127	* Create the data as_area.
		128	*/
1048	jermar	129	a = as_area_create(as, AS_AREA_READ \| AS_AREA_WRITE, PAGE_SIZE, USTACK_ADDRESS);
973	palkovsky	130
		131	thread_ready(t);
		132
		133	return task;
		134	}
1060	palkovsky	135
		136	/** Print task list */
		137	void task_print_list(void)
		138	{
		139	link_t *cur;
		140	task_t *t;
		141	ipl_t ipl;
		142	int i;
		143
		144	/* Messing with thread structures, avoid deadlock */
		145	ipl = interrupts_disable();
		146	spinlock_lock(&tasks_lock);
		147
		148	for (cur=tasks_head.next; cur!=&tasks_head; cur=cur->next) {
		149	t = list_get_instance(cur, task_t, tasks_link);
		150	spinlock_lock(&t->lock);
		151	printf("Task: %Q ActiveCalls: %d", t->taskid,
		152	atomic_get(&t->active_calls));
		153	for (i=0; i < IPC_MAX_PHONES; i++) {
		154	if (t->phones[i].callee)
		155	printf(" Ph(%d): %P ", i,t->phones[i].callee);
		156	}
		157	printf("\n");
		158	spinlock_unlock(&t->lock);
		159	}
		160
		161	spinlock_unlock(&tasks_lock);
		162	interrupts_restore(ipl);
		163
		164	}

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(root)/kernel/trunk/generic/src/proc/task.c @ 1417 – Rev 1060