source: mainline/kernel/generic/src/main/kinit.c@ a064d4f

Last change on this file since a064d4f was a064d4f, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 18 months ago

Make thread_join() imply thread_put()

This makes the function more similar to traditional threading APIs.
  • Property mode set to 100644
File size: 8.4 KB
Line 
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
29/** @addtogroup kernel_generic
30 * @{
31 */
32
33/**
34 * @file
35 * @brief Kernel initialization thread.
36 *
37 * This file contains kinit kernel thread which carries out
38 * high level system initialization.
39 *
40 * This file is responsible for finishing SMP configuration
41 * and creation of userspace init tasks.
42 */
43
44#include <assert.h>
45#include <main/kinit.h>
46#include <config.h>
47#include <arch.h>
48#include <proc/scheduler.h>
49#include <proc/task.h>
50#include <proc/thread.h>
51#include <proc/program.h>
52#include <panic.h>
53#include <halt.h>
54#include <cpu.h>
55#include <arch/asm.h>
56#include <mm/page.h>
57#include <arch/mm/page.h>
58#include <mm/as.h>
59#include <mm/frame.h>
60#include <mm/km.h>
61#include <stdio.h>
62#include <log.h>
63#include <memw.h>
64#include <console/console.h>
65#include <interrupt.h>
66#include <console/kconsole.h>
67#include <security/perm.h>
68#include <lib/rd.h>
69#include <ipc/ipc.h>
70#include <str.h>
71#include <str_error.h>
72#include <sysinfo/stats.h>
73#include <sysinfo/sysinfo.h>
74#include <align.h>
75#include <stdlib.h>
76#include <debug/register.h>
77
78#ifdef CONFIG_SMP
79#include <smp/smp.h>
80#endif /* CONFIG_SMP */
81
82#include <synch/waitq.h>
83#include <synch/spinlock.h>
84
85#define ALIVE_CHARS 4
86
87#ifdef CONFIG_KCONSOLE
88static char alive[ALIVE_CHARS] = "-\\|/";
89#endif
90
91#define INIT_PREFIX "init:"
92#define INIT_PREFIX_LEN 5
93
94/** Kernel initialization thread.
95 *
96 * kinit takes care of higher level kernel
97 * initialization (i.e. thread creation,
98 * userspace initialization etc.).
99 *
100 * @param arg Not used.
101 */
102void kinit(void *arg)
103{
104 thread_t *thread;
105
106 interrupts_disable();
107
108#ifdef CONFIG_SMP
109 if (config.cpu_count > 1) {
110 semaphore_initialize(&ap_completion_semaphore, 0);
111
112 /*
113 * Create the kmp thread and wait for its completion.
114 * cpu1 through cpuN-1 will come up consecutively and
115 * not mess together with kcpulb threads.
116 * Just a beautification.
117 */
118 thread = thread_create(kmp, NULL, TASK,
119 THREAD_FLAG_UNCOUNTED, "kmp");
120 if (!thread)
121 panic("Unable to create kmp thread.");
122
123 thread_wire(thread, &cpus[0]);
124 thread_ready(thread_ref(thread));
125 thread_join(thread);
126
127 /*
128 * For each CPU, create its load balancing thread.
129 */
130 unsigned int i;
131
132 for (i = 0; i < config.cpu_count; i++) {
133 thread = thread_create(kcpulb, NULL, TASK,
134 THREAD_FLAG_UNCOUNTED, "kcpulb");
135 if (thread != NULL) {
136 thread_wire(thread, &cpus[i]);
137 thread_ready(thread);
138 } else
139 log(LF_OTHER, LVL_ERROR,
140 "Unable to create kcpulb thread for cpu%u", i);
141 }
142 }
143#endif /* CONFIG_SMP */
144
145 /*
146 * At this point SMP, if present, is configured.
147 */
148 ARCH_OP(post_smp_init);
149
150 /* Start thread computing system load */
151 thread = thread_create(kload, NULL, TASK, THREAD_FLAG_NONE,
152 "kload");
153 if (thread != NULL)
154 thread_ready(thread);
155 else
156 log(LF_OTHER, LVL_ERROR, "Unable to create kload thread");
157
158#ifdef CONFIG_KCONSOLE
159 if (stdin) {
160 /*
161 * Create kernel console.
162 */
163 thread = thread_create(kconsole_thread, NULL, TASK,
164 THREAD_FLAG_NONE, "kconsole");
165 if (thread != NULL)
166 thread_ready(thread);
167 else
168 log(LF_OTHER, LVL_ERROR,
169 "Unable to create kconsole thread");
170 }
171#endif /* CONFIG_KCONSOLE */
172
173 /*
174 * Store the default stack size in sysinfo so that uspace can create
175 * stack with this default size.
176 */
177 sysinfo_set_item_val("default.stack_size", NULL, STACK_SIZE_USER);
178
179 interrupts_enable();
180
181 /*
182 * Create user tasks, load RAM disk images.
183 */
184 size_t i;
185 program_t programs[CONFIG_INIT_TASKS] = { };
186
187 // FIXME: do not propagate arguments through sysinfo
188 // but pass them directly to the tasks
189 for (i = 0; i < init.cnt; i++) {
190 const char *arguments = init.tasks[i].arguments;
191 if (str_length(arguments) == 0)
192 continue;
193 if (str_length(init.tasks[i].name) == 0)
194 continue;
195 size_t arguments_size = str_size(arguments);
196
197 void *arguments_copy = malloc(arguments_size);
198 if (arguments_copy == NULL)
199 continue;
200 memcpy(arguments_copy, arguments, arguments_size);
201
202 char item_name[CONFIG_TASK_NAME_BUFLEN + 15];
203 snprintf(item_name, CONFIG_TASK_NAME_BUFLEN + 15,
204 "init_args.%s", init.tasks[i].name);
205
206 sysinfo_set_item_data(item_name, NULL, arguments_copy, arguments_size);
207 }
208
209 for (i = 0; i < init.cnt; i++) {
210 if (init.tasks[i].paddr % FRAME_SIZE) {
211 log(LF_OTHER, LVL_ERROR,
212 "init[%zu]: Address is not frame aligned", i);
213 programs[i].task = NULL;
214 continue;
215 }
216
217 /*
218 * Construct task name from the 'init:' prefix and the
219 * name stored in the init structure (if any).
220 */
221
222 char namebuf[TASK_NAME_BUFLEN];
223
224 const char *name = init.tasks[i].name;
225 if (name[0] == 0)
226 name = "<unknown>";
227
228 static_assert(TASK_NAME_BUFLEN >= INIT_PREFIX_LEN, "");
229 str_cpy(namebuf, TASK_NAME_BUFLEN, INIT_PREFIX);
230 str_cpy(namebuf + INIT_PREFIX_LEN,
231 TASK_NAME_BUFLEN - INIT_PREFIX_LEN, name);
232
233 /*
234 * Create virtual memory mappings for init task images.
235 */
236 uintptr_t page = km_map(init.tasks[i].paddr,
237 init.tasks[i].size, PAGE_SIZE,
238 PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE);
239 assert(page);
240
241 if (str_cmp(name, "kernel.dbg") == 0) {
242 /*
243 * Not an actual init task, but rather debug sections extracted
244 * from the kernel ELF file and handed to us here so we can use
245 * it for debugging.
246 */
247
248 register_debug_data((void *) page, init.tasks[i].size);
249 programs[i].task = NULL;
250 continue;
251 }
252
253 if (str_cmp(name, "loader") == 0) {
254 /* Register image as the program loader */
255 if (program_loader == NULL) {
256 program_loader = (void *) page;
257 log(LF_OTHER, LVL_NOTE, "Program loader at %p",
258 program_loader);
259 } else {
260 log(LF_OTHER, LVL_ERROR,
261 "init[%zu]: Second binary named \"loader\""
262 " present.", i);
263 }
264
265 programs[i].task = NULL;
266 continue;
267 }
268
269 errno_t rc = program_create_from_image((void *) page, init.tasks[i].size, namebuf,
270 &programs[i]);
271
272 if (rc == 0) {
273 assert(programs[i].task != NULL);
274
275 /*
276 * Set permissions to init userspace tasks.
277 */
278 perm_set(programs[i].task,
279 PERM_PERM | PERM_MEM_MANAGER |
280 PERM_IO_MANAGER | PERM_IRQ_REG);
281
282 if (!ipc_box_0) {
283 ipc_box_0 = &programs[i].task->answerbox;
284 /*
285 * Hold the first task so that
286 * ipc_box_0 remains a valid pointer
287 * even if the first task exits for
288 * whatever reason.
289 */
290 task_hold(programs[i].task);
291 }
292
293 } else if (i == init.cnt - 1) {
294 /*
295 * Assume the last task is the RAM disk.
296 */
297 init_rd((void *) init.tasks[i].paddr, init.tasks[i].size);
298 } else {
299 log(LF_OTHER, LVL_ERROR,
300 "init[%zu]: Init binary load failed "
301 "(error %s, loader status %s)", i,
302 str_error_name(rc), str_error_name(programs[i].loader_status));
303 }
304 }
305
306 /*
307 * Run user tasks.
308 */
309 for (i = 0; i < init.cnt; i++) {
310 if (programs[i].task != NULL)
311 program_ready(&programs[i]);
312 }
313
314#ifdef CONFIG_KCONSOLE
315 if (!stdin) {
316 thread_sleep(10);
317 printf("kinit: No stdin\nKernel alive: .");
318
319 unsigned int i = 0;
320 while (true) {
321 printf("\b%c", alive[i % ALIVE_CHARS]);
322 thread_sleep(1);
323 i++;
324 }
325 }
326#endif /* CONFIG_KCONSOLE */
327}
328
329/** @}
330 */
Note: See TracBrowser for help on using the repository browser.