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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <main/uinit.h>
1 jermar 30
#include <proc/thread.h>
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#include <proc/task.h>
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#include <proc/uarg.h>
703 jermar 33
#include <mm/as.h>
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#include <mm/slab.h>
1 jermar 35
#include <synch/spinlock.h>
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#include <arch.h>
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#include <panic.h>
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#include <adt/btree.h>
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#include <adt/list.h>
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#include <ipc/ipc.h>
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#include <security/cap.h>
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#include <memstr.h>
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#include <print.h>
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#include <elf.h>
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1168 vana 46
 
1170 vana 47
#ifndef LOADED_PROG_STACK_PAGES_NO
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#define LOADED_PROG_STACK_PAGES_NO 1
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#endif
1168 vana 50
 
623 jermar 51
SPINLOCK_INITIALIZE(tasks_lock);
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btree_t tasks_btree;
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static task_id_t task_counter = 0;
1 jermar 54
 
107 decky 55
/** Initialize tasks
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 *
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 * Initialize kernel tasks support.
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 *
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 */
1 jermar 60
void task_init(void)
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{
15 jermar 62
    TASK = NULL;
1159 jermar 63
    btree_create(&tasks_btree);
1 jermar 64
}
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107 decky 66
 
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/** Create new task
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 *
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 * Create new task with no threads.
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 *
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 * @param as Task's address space.
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 * @param name Symbolic name.
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 *
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 * @return New task's structure
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 *
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 */
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task_t *task_create(as_t *as, char *name)
1 jermar 78
{
413 jermar 79
    ipl_t ipl;
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    task_t *ta;
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    int i;
1 jermar 82
 
822 palkovsky 83
    ta = (task_t *) malloc(sizeof(task_t), 0);
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    spinlock_initialize(&ta->lock, "task_ta_lock");
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    list_initialize(&ta->th_head);
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    ta->as = as;
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    ta->name = name;
955 palkovsky 89
 
1174 jermar 90
    ta->capabilities = 0;
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955 palkovsky 92
    ipc_answerbox_init(&ta->answerbox);
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    for (i=0; i < IPC_MAX_PHONES;i++)
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        ipc_phone_init(&ta->phones[i]);
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    if (ipc_phone_0)
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        ipc_phone_connect(&ta->phones[0], ipc_phone_0);
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    atomic_set(&ta->active_calls, 0);
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    ipl = interrupts_disable();
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    spinlock_lock(&tasks_lock);
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    ta->taskid = ++task_counter;
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    btree_insert(&tasks_btree, (btree_key_t) ta->taskid, (void *) ta, NULL);
1005 palkovsky 104
 
822 palkovsky 105
    spinlock_unlock(&tasks_lock);
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    interrupts_restore(ipl);
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1 jermar 108
    return ta;
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}
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973 palkovsky 111
/** Create new task with 1 thread and run it
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 *
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 * @param programe_addr Address of program executable image.
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 * @param name Program name.
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 *
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 * @return Task of the running program or NULL on error
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 */
1062 jermar 118
task_t * task_run_program(void *program_addr, char *name)
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{
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    as_t *as;
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    as_area_t *a;
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    int rc;
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    thread_t *t;
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    task_t *task;
1078 jermar 125
    uspace_arg_t *kernel_uarg;
973 palkovsky 126
 
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    as = as_create(0);
1115 jermar 128
    ASSERT(as);
973 palkovsky 129
 
1025 palkovsky 130
    rc = elf_load((elf_header_t *) program_addr, as);
973 palkovsky 131
    if (rc != EE_OK) {
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        as_free(as);
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        return NULL;
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    }
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1078 jermar 136
    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
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    kernel_uarg->uspace_entry = (void *) ((elf_header_t *) program_addr)->e_entry;
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    kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;
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    kernel_uarg->uspace_thread_function = NULL;
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    kernel_uarg->uspace_thread_arg = NULL;
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    kernel_uarg->uspace_uarg = NULL;
1066 jermar 142
 
1062 jermar 143
    task = task_create(as, name);
1115 jermar 144
    ASSERT(task);
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973 palkovsky 146
    /*
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     * Create the data as_area.
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     */
1168 vana 149
    a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE, LOADED_PROG_STACK_PAGES_NO*PAGE_SIZE, USTACK_ADDRESS);
1115 jermar 150
 
151
    t = thread_create(uinit, kernel_uarg, task, 0, "uinit");
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    ASSERT(t);
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    thread_ready(t);
973 palkovsky 154
 
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    return task;
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}
1060 palkovsky 157
 
1176 jermar 158
/** Syscall for reading task ID from userspace.
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 *
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 * @param uaddr Userspace address of 8-byte buffer where to store current task ID.
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 *
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 * @return Always returns 0.
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 */
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__native sys_get_task_id(task_id_t *uspace_task_id)
165
{
166
    /*
167
     * No need to acquire lock on TASK because taskid
168
     * remains constant for the lifespan of the task.
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     */
170
    copy_to_uspace(uspace_task_id, &TASK->taskid, sizeof(TASK->taskid));
171
 
172
    return 0;
173
}
174
 
1060 palkovsky 175
/** Print task list */
176
void task_print_list(void)
177
{
178
    link_t *cur;
179
    ipl_t ipl;
180
 
181
    /* Messing with thread structures, avoid deadlock */
182
    ipl = interrupts_disable();
183
    spinlock_lock(&tasks_lock);
184
 
1159 jermar 185
    for (cur = tasks_btree.leaf_head.next; cur != &tasks_btree.leaf_head; cur = cur->next) {
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        btree_node_t *node;
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        int i;
188
 
189
        node = list_get_instance(cur, btree_node_t, leaf_link);
190
        for (i = 0; i < node->keys; i++) {
191
            task_t *t;
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            int j;
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            t = (task_t *) node->value[i];
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            spinlock_lock(&t->lock);
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            printf("%s: address=%P, taskid=%Q, as=%P, ActiveCalls: %d",
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                t->name, t, t->taskid, t->as, atomic_get(&t->active_calls));
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            for (j=0; j < IPC_MAX_PHONES; j++) {
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                if (t->phones[j].callee)
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                    printf(" Ph(%d): %P ", j, t->phones[j].callee);
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            }
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            printf("\n");
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            spinlock_unlock(&t->lock);
1060 palkovsky 205
        }
206
    }
207
 
208
    spinlock_unlock(&tasks_lock);
209
    interrupts_restore(ipl);
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211
}