source: mainline/kernel/generic/src/main/kinit.c@ 0b5203b

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 0b5203b was aafed15, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Declare malloc() etc in standard <stdlib.h> rather than <mm/slab.h>
  • Property mode set to 100644
File size: 8.1 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 <mem.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 <sysinfo/stats.h>
72#include <sysinfo/sysinfo.h>
73#include <align.h>
74#include <stdlib.h>
75
76#ifdef CONFIG_SMP
77#include <smp/smp.h>
78#endif /* CONFIG_SMP */
79
80#include <synch/waitq.h>
81#include <synch/spinlock.h>
82
83#define ALIVE_CHARS 4
84
85#ifdef CONFIG_KCONSOLE
86static char alive[ALIVE_CHARS] = "-\\|/";
87#endif
88
89#define INIT_PREFIX "init:"
90#define INIT_PREFIX_LEN 5
91
92/** Kernel initialization thread.
93 *
94 * kinit takes care of higher level kernel
95 * initialization (i.e. thread creation,
96 * userspace initialization etc.).
97 *
98 * @param arg Not used.
99 */
100void kinit(void *arg)
101{
102 thread_t *thread;
103
104 /*
105 * Detach kinit as nobody will call thread_join_timeout() on it.
106 */
107 thread_detach(THREAD);
108
109 interrupts_disable();
110
111#ifdef CONFIG_SMP
112 if (config.cpu_count > 1) {
113 waitq_initialize(&ap_completion_wq);
114
115 /*
116 * Create the kmp thread and wait for its completion.
117 * cpu1 through cpuN-1 will come up consecutively and
118 * not mess together with kcpulb threads.
119 * Just a beautification.
120 */
121 thread = thread_create(kmp, NULL, TASK,
122 THREAD_FLAG_UNCOUNTED, "kmp");
123 if (!thread)
124 panic("Unable to create kmp thread.");
125
126 thread_wire(thread, &cpus[0]);
127 thread_ready(thread);
128 thread_join(thread);
129 thread_detach(thread);
130
131 /*
132 * For each CPU, create its load balancing thread.
133 */
134 unsigned int i;
135
136 for (i = 0; i < config.cpu_count; i++) {
137 thread = thread_create(kcpulb, NULL, TASK,
138 THREAD_FLAG_UNCOUNTED, "kcpulb");
139 if (thread != NULL) {
140 thread_wire(thread, &cpus[i]);
141 thread_ready(thread);
142 } else
143 log(LF_OTHER, LVL_ERROR,
144 "Unable to create kcpulb thread for cpu%u", i);
145 }
146 }
147#endif /* CONFIG_SMP */
148
149 /*
150 * At this point SMP, if present, is configured.
151 */
152 ARCH_OP(post_smp_init);
153
154 /* Start thread computing system load */
155 thread = thread_create(kload, NULL, TASK, THREAD_FLAG_NONE,
156 "kload");
157 if (thread != NULL)
158 thread_ready(thread);
159 else
160 log(LF_OTHER, LVL_ERROR, "Unable to create kload thread");
161
162#ifdef CONFIG_KCONSOLE
163 if (stdin) {
164 /*
165 * Create kernel console.
166 */
167 thread = thread_create(kconsole_thread, NULL, TASK,
168 THREAD_FLAG_NONE, "kconsole");
169 if (thread != NULL)
170 thread_ready(thread);
171 else
172 log(LF_OTHER, LVL_ERROR,
173 "Unable to create kconsole thread");
174 }
175#endif /* CONFIG_KCONSOLE */
176
177 /*
178 * Store the default stack size in sysinfo so that uspace can create
179 * stack with this default size.
180 */
181 sysinfo_set_item_val("default.stack_size", NULL, STACK_SIZE_USER);
182
183 interrupts_enable();
184
185 /*
186 * Create user tasks, load RAM disk images.
187 */
188 size_t i;
189 program_t programs[CONFIG_INIT_TASKS];
190
191 // FIXME: do not propagate arguments through sysinfo
192 // but pass them directly to the tasks
193 for (i = 0; i < init.cnt; i++) {
194 const char *arguments = init.tasks[i].arguments;
195 if (str_length(arguments) == 0)
196 continue;
197 if (str_length(init.tasks[i].name) == 0)
198 continue;
199 size_t arguments_size = str_size(arguments);
200
201 void *arguments_copy = malloc(arguments_size);
202 if (arguments_copy == NULL)
203 continue;
204 memcpy(arguments_copy, arguments, arguments_size);
205
206 char item_name[CONFIG_TASK_NAME_BUFLEN + 15];
207 snprintf(item_name, CONFIG_TASK_NAME_BUFLEN + 15,
208 "init_args.%s", init.tasks[i].name);
209
210 sysinfo_set_item_data(item_name, NULL, arguments_copy, arguments_size);
211 }
212
213 for (i = 0; i < init.cnt; i++) {
214 if (init.tasks[i].paddr % FRAME_SIZE) {
215 log(LF_OTHER, LVL_ERROR,
216 "init[%zu]: Address is not frame aligned", i);
217 programs[i].task = NULL;
218 continue;
219 }
220
221 /*
222 * Construct task name from the 'init:' prefix and the
223 * name stored in the init structure (if any).
224 */
225
226 char namebuf[TASK_NAME_BUFLEN];
227
228 const char *name = init.tasks[i].name;
229 if (name[0] == 0)
230 name = "<unknown>";
231
232 static_assert(TASK_NAME_BUFLEN >= INIT_PREFIX_LEN, "");
233 str_cpy(namebuf, TASK_NAME_BUFLEN, INIT_PREFIX);
234 str_cpy(namebuf + INIT_PREFIX_LEN,
235 TASK_NAME_BUFLEN - INIT_PREFIX_LEN, name);
236
237 /*
238 * Create virtual memory mappings for init task images.
239 */
240 uintptr_t page = km_map(init.tasks[i].paddr,
241 init.tasks[i].size, PAGE_SIZE,
242 PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE);
243 assert(page);
244
245 if (str_cmp(name, "loader") == 0) {
246 /* Register image as the program loader */
247 if (program_loader == NULL) {
248 program_loader = (void *) page;
249 log(LF_OTHER, LVL_NOTE, "Program loader at %p",
250 program_loader);
251 } else {
252 log(LF_OTHER, LVL_ERROR,
253 "init[%zu]: Second binary named \"loader\""
254 " present.", i);
255 }
256
257 programs[i].task = NULL;
258 continue;
259 }
260
261 errno_t rc = program_create_from_image((void *) page, namebuf,
262 &programs[i]);
263
264 if (rc == 0) {
265 assert(programs[i].task != NULL);
266
267 /*
268 * Set permissions to init userspace tasks.
269 */
270 perm_set(programs[i].task,
271 PERM_PERM | PERM_MEM_MANAGER |
272 PERM_IO_MANAGER | PERM_IRQ_REG);
273
274 if (!ipc_box_0) {
275 ipc_box_0 = &programs[i].task->answerbox;
276 /*
277 * Hold the first task so that
278 * ipc_box_0 remains a valid pointer
279 * even if the first task exits for
280 * whatever reason.
281 */
282 task_hold(programs[i].task);
283 }
284
285 } else if (i == init.cnt - 1) {
286 /*
287 * Assume the last task is the RAM disk.
288 */
289 init_rd((void *) init.tasks[i].paddr, init.tasks[i].size);
290 } else {
291 log(LF_OTHER, LVL_ERROR,
292 "init[%zu]: Init binary load failed "
293 "(error %s, loader status %u)", i,
294 str_error_name(rc), programs[i].loader_status);
295 }
296 }
297
298 /*
299 * Run user tasks.
300 */
301 for (i = 0; i < init.cnt; i++) {
302 if (programs[i].task != NULL)
303 program_ready(&programs[i]);
304 }
305
306#ifdef CONFIG_KCONSOLE
307 if (!stdin) {
308 thread_sleep(10);
309 printf("kinit: No stdin\nKernel alive: .");
310
311 unsigned int i = 0;
312 while (true) {
313 printf("\b%c", alive[i % ALIVE_CHARS]);
314 thread_sleep(1);
315 i++;
316 }
317 }
318#endif /* CONFIG_KCONSOLE */
319}
320
321/** @}
322 */
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