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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 973 | palkovsky | 29 | #include <main/uinit.h> |
| 1 | jermar | 30 | #include <proc/thread.h> |
| 31 | #include <proc/task.h> |
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| 703 | jermar | 32 | #include <mm/as.h> |
| 814 | palkovsky | 33 | #include <mm/slab.h> |
| 1 | jermar | 34 | |
| 35 | #include <synch/spinlock.h> |
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| 36 | #include <arch.h> |
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| 37 | #include <panic.h> |
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| 788 | jermar | 38 | #include <adt/list.h> |
| 955 | palkovsky | 39 | #include <ipc/ipc.h> |
| 40 | #include <memstr.h> |
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| 1 | jermar | 41 | |
| 973 | palkovsky | 42 | #include <elf.h> |
| 43 | |||
| 623 | jermar | 44 | SPINLOCK_INITIALIZE(tasks_lock); |
| 624 | jermar | 45 | LIST_INITIALIZE(tasks_head); |
| 1005 | palkovsky | 46 | static task_id_t task_counter = 0; |
| 1 | jermar | 47 | |
| 107 | decky | 48 | /** Initialize tasks |
| 49 | * |
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| 50 | * Initialize kernel tasks support. |
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| 51 | * |
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| 52 | */ |
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| 1 | jermar | 53 | void task_init(void) |
| 54 | { |
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| 15 | jermar | 55 | TASK = NULL; |
| 1 | jermar | 56 | } |
| 57 | |||
| 107 | decky | 58 | |
| 59 | /** Create new task |
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| 60 | * |
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| 61 | * Create new task with no threads. |
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| 62 | * |
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| 703 | jermar | 63 | * @param as Task's address space. |
| 107 | decky | 64 | * |
| 973 | palkovsky | 65 | * @return New task's structure |
| 107 | decky | 66 | * |
| 67 | */ |
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| 703 | jermar | 68 | task_t *task_create(as_t *as) |
| 1 | jermar | 69 | { |
| 413 | jermar | 70 | ipl_t ipl; |
| 1 | jermar | 71 | task_t *ta; |
| 72 | |||
| 822 | palkovsky | 73 | ta = (task_t *) malloc(sizeof(task_t), 0); |
| 74 | |||
| 75 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
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| 76 | list_initialize(&ta->th_head); |
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| 77 | list_initialize(&ta->tasks_link); |
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| 78 | ta->as = as; |
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| 955 | palkovsky | 79 | |
| 80 | ipc_answerbox_init(&ta->answerbox); |
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| 81 | memsetb((__address)&ta->phones, sizeof(ta->phones[0])*IPC_MAX_PHONES, 0); |
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| 965 | palkovsky | 82 | if (ipc_phone_0) |
| 83 | ipc_phone_init(&ta->phones[0], ipc_phone_0); |
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| 998 | palkovsky | 84 | atomic_set(&ta->active_calls, 0); |
| 822 | palkovsky | 85 | |
| 86 | ipl = interrupts_disable(); |
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| 87 | spinlock_lock(&tasks_lock); |
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| 1005 | palkovsky | 88 | |
| 89 | ta->taskid = ++task_counter; |
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| 822 | palkovsky | 90 | list_append(&ta->tasks_link, &tasks_head); |
| 1005 | palkovsky | 91 | |
| 822 | palkovsky | 92 | spinlock_unlock(&tasks_lock); |
| 93 | interrupts_restore(ipl); |
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| 94 | |||
| 1 | jermar | 95 | return ta; |
| 96 | } |
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| 97 | |||
| 973 | palkovsky | 98 | /** Create new task with 1 thread and run it |
| 99 | * |
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| 100 | * @return Task of the running program or NULL on error |
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| 101 | */ |
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| 102 | task_t * task_run_program(void *program_addr) |
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| 103 | { |
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| 104 | as_t *as; |
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| 105 | as_area_t *a; |
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| 106 | int rc; |
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| 107 | thread_t *t; |
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| 108 | task_t *task; |
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| 109 | |||
| 110 | as = as_create(0); |
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| 111 | |||
| 1025 | palkovsky | 112 | rc = elf_load((elf_header_t *) program_addr, as); |
| 973 | palkovsky | 113 | if (rc != EE_OK) { |
| 114 | as_free(as); |
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| 115 | return NULL; |
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| 116 | } |
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| 117 | |||
| 118 | task = task_create(as); |
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| 1025 | palkovsky | 119 | t = thread_create(uinit, (void *)((elf_header_t *)program_addr)->e_entry, |
| 973 | palkovsky | 120 | task, THREAD_USER_STACK); |
| 121 | |||
| 122 | /* |
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| 123 | * Create the data as_area. |
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| 124 | */ |
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| 1026 | jermar | 125 | a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE, 1, USTACK_ADDRESS); |
| 973 | palkovsky | 126 | |
| 127 | thread_ready(t); |
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| 128 | |||
| 129 | return task; |
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| 130 | } |