| 1 | /*
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| 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 |
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| 29 | /** @addtogroup main
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file
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| 35 | * @brief Kernel initialization thread.
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| 36 | *
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| 37 | * This file contains kinit kernel thread which carries out
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| 38 | * high level system initialization.
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| 39 | *
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| 40 | * This file is responsible for finishing SMP configuration
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| 41 | * and creation of userspace init tasks.
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| 42 | */
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| 43 |
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| 44 | #include <main/kinit.h>
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| 45 | #include <config.h>
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| 46 | #include <arch.h>
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| 47 | #include <proc/scheduler.h>
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| 48 | #include <proc/task.h>
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| 49 | #include <proc/thread.h>
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| 50 | #include <proc/program.h>
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| 51 | #include <panic.h>
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| 52 | #include <func.h>
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| 53 | #include <cpu.h>
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| 54 | #include <arch/asm.h>
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| 55 | #include <mm/page.h>
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| 56 | #include <arch/mm/page.h>
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| 57 | #include <mm/as.h>
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| 58 | #include <mm/frame.h>
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| 59 | #include <mm/km.h>
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| 60 | #include <print.h>
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| 61 | #include <memstr.h>
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| 62 | #include <console/console.h>
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| 63 | #include <interrupt.h>
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| 64 | #include <console/kconsole.h>
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| 65 | #include <security/cap.h>
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| 66 | #include <lib/rd.h>
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| 67 | #include <ipc/ipc.h>
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| 68 | #include <debug.h>
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| 69 | #include <str.h>
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| 70 | #include <sysinfo/stats.h>
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| 71 | #include <align.h>
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| 72 |
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| 73 | #ifdef CONFIG_SMP
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| 74 | #include <smp/smp.h>
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| 75 | #endif /* CONFIG_SMP */
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| 76 |
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| 77 | #include <synch/waitq.h>
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| 78 | #include <synch/spinlock.h>
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| 79 |
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| 80 | #define ALIVE_CHARS 4
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| 81 |
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| 82 | #ifdef CONFIG_KCONSOLE
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| 83 | static char alive[ALIVE_CHARS] = "-\\|/";
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| 84 | #endif
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| 85 |
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| 86 | #define INIT_PREFIX "init:"
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| 87 | #define INIT_PREFIX_LEN 5
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| 88 |
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| 89 | /** Kernel initialization thread.
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| 90 | *
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| 91 | * kinit takes care of higher level kernel
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| 92 | * initialization (i.e. thread creation,
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| 93 | * userspace initialization etc.).
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| 94 | *
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| 95 | * @param arg Not used.
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| 96 | */
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| 97 | void kinit(void *arg)
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| 98 | {
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| 99 | thread_t *thread;
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| 100 |
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| 101 | /*
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| 102 | * Detach kinit as nobody will call thread_join_timeout() on it.
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| 103 | */
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| 104 | thread_detach(THREAD);
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| 105 |
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| 106 | interrupts_disable();
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| 107 |
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| 108 | #ifdef CONFIG_SMP
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| 109 | if (config.cpu_count > 1) {
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| 110 | waitq_initialize(&ap_completion_wq);
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| 111 |
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| 112 | /*
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| 113 | * Create the kmp thread and wait for its completion.
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| 114 | * cpu1 through cpuN-1 will come up consecutively and
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| 115 | * not mess together with kcpulb threads.
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| 116 | * Just a beautification.
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| 117 | */
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| 118 | thread = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp", true);
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| 119 | if (thread != NULL) {
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| 120 | irq_spinlock_lock(&thread->lock, false);
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| 121 | thread->cpu = &cpus[0];
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| 122 | irq_spinlock_unlock(&thread->lock, false);
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| 123 | thread_ready(thread);
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| 124 | } else
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| 125 | panic("Unable to create kmp thread.");
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| 126 |
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| 127 | thread_join(thread);
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| 128 | thread_detach(thread);
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| 129 |
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| 130 | /*
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| 131 | * For each CPU, create its load balancing thread.
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| 132 | */
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| 133 | unsigned int i;
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| 134 |
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| 135 | for (i = 0; i < config.cpu_count; i++) {
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| 136 | thread = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb", true);
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| 137 | if (thread != NULL) {
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| 138 | irq_spinlock_lock(&thread->lock, false);
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| 139 | thread->cpu = &cpus[i];
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| 140 | irq_spinlock_unlock(&thread->lock, false);
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| 141 | thread_ready(thread);
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| 142 | } else
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| 143 | printf("Unable to create kcpulb thread for cpu%u\n", i);
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| 144 | }
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| 145 | }
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| 146 | #endif /* CONFIG_SMP */
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| 147 |
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| 148 | /*
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| 149 | * At this point SMP, if present, is configured.
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| 150 | */
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| 151 | arch_post_smp_init();
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| 152 |
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| 153 | /* Start thread computing system load */
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| 154 | thread = thread_create(kload, NULL, TASK, 0, "kload", false);
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| 155 | if (thread != NULL)
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| 156 | thread_ready(thread);
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| 157 | else
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| 158 | printf("Unable to create kload thread\n");
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| 159 |
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| 160 | #ifdef CONFIG_KCONSOLE
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| 161 | if (stdin) {
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| 162 | /*
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| 163 | * Create kernel console.
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| 164 | */
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| 165 | thread = thread_create(kconsole_thread, NULL, TASK, 0, "kconsole", false);
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| 166 | if (thread != NULL)
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| 167 | thread_ready(thread);
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| 168 | else
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| 169 | printf("Unable to create kconsole thread\n");
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| 170 | }
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| 171 | #endif /* CONFIG_KCONSOLE */
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| 172 |
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| 173 | interrupts_enable();
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| 174 |
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| 175 | /*
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| 176 | * Create user tasks, load RAM disk images.
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| 177 | */
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| 178 | size_t i;
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| 179 | program_t programs[CONFIG_INIT_TASKS];
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| 180 |
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| 181 | for (i = 0; i < init.cnt; i++) {
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| 182 | if (init.tasks[i].paddr % FRAME_SIZE) {
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| 183 | printf("init[%zu]: Address is not frame aligned\n", i);
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| 184 | programs[i].task = NULL;
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| 185 | continue;
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| 186 | }
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| 187 |
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| 188 | /*
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| 189 | * Construct task name from the 'init:' prefix and the
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| 190 | * name stored in the init structure (if any).
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| 191 | */
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| 192 |
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| 193 | char namebuf[TASK_NAME_BUFLEN];
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| 194 |
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| 195 | const char *name = init.tasks[i].name;
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| 196 | if (name[0] == 0)
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| 197 | name = "<unknown>";
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| 198 |
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| 199 | ASSERT(TASK_NAME_BUFLEN >= INIT_PREFIX_LEN);
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| 200 | str_cpy(namebuf, TASK_NAME_BUFLEN, INIT_PREFIX);
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| 201 | str_cpy(namebuf + INIT_PREFIX_LEN,
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| 202 | TASK_NAME_BUFLEN - INIT_PREFIX_LEN, name);
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| 203 |
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| 204 | /*
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| 205 | * Create virtual memory mappings for init task images.
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| 206 | */
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| 207 | size_t size = ALIGN_UP(init.tasks[i].size, PAGE_SIZE);
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| 208 | size_t offs;
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| 209 | uintptr_t page = km_page_alloc(size, PAGE_SIZE);
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| 210 | uintptr_t frame = init.tasks[i].paddr;
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| 211 |
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| 212 | page_table_lock(AS_KERNEL, true);
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| 213 | for (offs = 0; offs < size; offs += PAGE_SIZE) {
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| 214 | page_mapping_insert(AS_KERNEL, page + offs,
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| 215 | frame + offs,
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| 216 | PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE |
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| 217 | PAGE_PRESENT);
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| 218 | }
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| 219 | page_table_unlock(AS_KERNEL, true);
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| 220 |
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| 221 | int rc = program_create_from_image((void *) page, namebuf,
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| 222 | &programs[i]);
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| 223 |
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| 224 | if (rc == 0) {
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| 225 | if (programs[i].task != NULL) {
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| 226 | /*
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| 227 | * Set capabilities to init userspace tasks.
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| 228 | */
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| 229 | cap_set(programs[i].task, CAP_CAP | CAP_MEM_MANAGER |
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| 230 | CAP_IO_MANAGER | CAP_IRQ_REG);
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| 231 |
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| 232 | if (!ipc_phone_0)
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| 233 | ipc_phone_0 = &programs[i].task->answerbox;
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| 234 | }
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| 235 |
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| 236 | /*
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| 237 | * If programs[i].task == NULL then it is
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| 238 | * the program loader and it was registered
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| 239 | * successfully.
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| 240 | */
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| 241 | } else if (i == init.cnt - 1) {
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| 242 | /*
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| 243 | * Assume the last task is the RAM disk.
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| 244 | */
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| 245 | init_rd((void *) frame, init.tasks[i].size);
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| 246 | } else
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| 247 | printf("init[%zu]: Init binary load failed (error %d)\n", i, rc);
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| 248 | }
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| 249 |
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| 250 | /*
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| 251 | * Run user tasks.
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| 252 | */
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| 253 | for (i = 0; i < init.cnt; i++) {
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| 254 | if (programs[i].task != NULL)
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| 255 | program_ready(&programs[i]);
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| 256 | }
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| 257 |
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| 258 | #ifdef CONFIG_KCONSOLE
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| 259 | if (!stdin) {
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| 260 | thread_sleep(10);
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| 261 | printf("kinit: No stdin\nKernel alive: .");
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| 262 |
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| 263 | unsigned int i = 0;
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| 264 | while (true) {
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| 265 | printf("\b%c", alive[i % ALIVE_CHARS]);
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| 266 | thread_sleep(1);
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| 267 | i++;
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| 268 | }
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| 269 | }
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| 270 | #endif /* CONFIG_KCONSOLE */
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| 271 | }
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| 272 |
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| 273 | /** @}
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| 274 | */
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