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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup main |
29 | /** @addtogroup main |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Main initialization kernel function for all processors. |
35 | * @brief Main initialization kernel function for all processors. |
36 | * |
36 | * |
37 | * During kernel boot, all processors, after architecture dependent |
37 | * During kernel boot, all processors, after architecture dependent |
38 | * initialization, start executing code found in this file. After |
38 | * initialization, start executing code found in this file. After |
39 | * bringing up all subsystems, control is passed to scheduler(). |
39 | * bringing up all subsystems, control is passed to scheduler(). |
40 | * |
40 | * |
41 | * The bootstrap processor starts executing main_bsp() while |
41 | * The bootstrap processor starts executing main_bsp() while |
42 | * the application processors start executing main_ap(). |
42 | * the application processors start executing main_ap(). |
43 | * |
43 | * |
44 | * @see scheduler() |
44 | * @see scheduler() |
45 | * @see main_bsp() |
45 | * @see main_bsp() |
46 | * @see main_ap() |
46 | * @see main_ap() |
47 | */ |
47 | */ |
48 | 48 | ||
49 | #include <arch/asm.h> |
49 | #include <arch/asm.h> |
50 | #include <context.h> |
50 | #include <context.h> |
51 | #include <print.h> |
51 | #include <print.h> |
52 | #include <panic.h> |
52 | #include <panic.h> |
53 | #include <debug.h> |
53 | #include <debug.h> |
54 | #include <config.h> |
54 | #include <config.h> |
55 | #include <time/clock.h> |
55 | #include <time/clock.h> |
56 | #include <time/timeout.h> |
56 | #include <time/timeout.h> |
57 | #include <proc/scheduler.h> |
57 | #include <proc/scheduler.h> |
58 | #include <proc/thread.h> |
58 | #include <proc/thread.h> |
59 | #include <proc/task.h> |
59 | #include <proc/task.h> |
60 | #include <main/kinit.h> |
60 | #include <main/kinit.h> |
61 | #include <main/version.h> |
61 | #include <main/version.h> |
62 | #include <console/kconsole.h> |
62 | #include <console/kconsole.h> |
63 | #include <cpu.h> |
63 | #include <cpu.h> |
64 | #include <align.h> |
64 | #include <align.h> |
65 | #include <interrupt.h> |
65 | #include <interrupt.h> |
66 | #include <arch/mm/memory_init.h> |
66 | #include <arch/mm/memory_init.h> |
67 | #include <mm/frame.h> |
67 | #include <mm/frame.h> |
68 | #include <mm/page.h> |
68 | #include <mm/page.h> |
69 | #include <genarch/mm/page_pt.h> |
69 | #include <genarch/mm/page_pt.h> |
70 | #include <mm/tlb.h> |
70 | #include <mm/tlb.h> |
71 | #include <mm/as.h> |
71 | #include <mm/as.h> |
72 | #include <mm/slab.h> |
72 | #include <mm/slab.h> |
73 | #include <synch/waitq.h> |
73 | #include <synch/waitq.h> |
74 | #include <synch/futex.h> |
74 | #include <synch/futex.h> |
75 | #include <arch/arch.h> |
75 | #include <arch/arch.h> |
76 | #include <arch.h> |
76 | #include <arch.h> |
77 | #include <arch/faddr.h> |
77 | #include <arch/faddr.h> |
78 | #include <ipc/ipc.h> |
78 | #include <ipc/ipc.h> |
79 | #include <macros.h> |
79 | #include <macros.h> |
80 | #include <adt/btree.h> |
80 | #include <adt/btree.h> |
81 | #include <console/klog.h> |
81 | #include <console/klog.h> |
82 | #include <smp/smp.h> |
82 | #include <smp/smp.h> |
83 | #include <ddi/ddi.h> |
83 | #include <ddi/ddi.h> |
84 | #include <proc/tasklet.h> |
84 | #include <proc/tasklet.h> |
- | 85 | #include <synch/rcu.h> |
|
85 | 86 | ||
86 | /** Global configuration structure. */ |
87 | /** Global configuration structure. */ |
87 | config_t config; |
88 | config_t config; |
88 | 89 | ||
89 | /** Initial user-space tasks */ |
90 | /** Initial user-space tasks */ |
90 | init_t init = { |
91 | init_t init = { |
91 | 0 |
92 | 0 |
92 | }; |
93 | }; |
93 | 94 | ||
94 | /** Boot allocations. */ |
95 | /** Boot allocations. */ |
95 | ballocs_t ballocs = { |
96 | ballocs_t ballocs = { |
96 | .base = NULL, |
97 | .base = NULL, |
97 | .size = 0 |
98 | .size = 0 |
98 | }; |
99 | }; |
99 | 100 | ||
100 | context_t ctx; |
101 | context_t ctx; |
101 | 102 | ||
102 | /* |
103 | /* |
103 | * These 'hardcoded' variables will be intialized by |
104 | * These 'hardcoded' variables will be intialized by |
104 | * the linker or the low level assembler code with |
105 | * the linker or the low level assembler code with |
105 | * appropriate sizes and addresses. |
106 | * appropriate sizes and addresses. |
106 | */ |
107 | */ |
107 | uintptr_t hardcoded_load_address = 0; /**< Virtual address of where the kernel |
108 | uintptr_t hardcoded_load_address = 0; /**< Virtual address of where the kernel |
108 | * is loaded. */ |
109 | * is loaded. */ |
109 | size_t hardcoded_ktext_size = 0; /**< Size of the kernel code in bytes. |
110 | size_t hardcoded_ktext_size = 0; /**< Size of the kernel code in bytes. |
110 | */ |
111 | */ |
111 | size_t hardcoded_kdata_size = 0; /**< Size of the kernel data in bytes. |
112 | size_t hardcoded_kdata_size = 0; /**< Size of the kernel data in bytes. |
112 | */ |
113 | */ |
113 | uintptr_t stack_safe = 0; /**< Lowest safe stack virtual address. |
114 | uintptr_t stack_safe = 0; /**< Lowest safe stack virtual address. |
114 | */ |
115 | */ |
115 | 116 | ||
116 | void main_bsp(void); |
117 | void main_bsp(void); |
117 | void main_ap(void); |
118 | void main_ap(void); |
118 | 119 | ||
119 | /* |
120 | /* |
120 | * These two functions prevent stack from underflowing during the |
121 | * These two functions prevent stack from underflowing during the |
121 | * kernel boot phase when SP is set to the very top of the reserved |
122 | * kernel boot phase when SP is set to the very top of the reserved |
122 | * space. The stack could get corrupted by a fooled compiler-generated |
123 | * space. The stack could get corrupted by a fooled compiler-generated |
123 | * pop sequence otherwise. |
124 | * pop sequence otherwise. |
124 | */ |
125 | */ |
125 | static void main_bsp_separated_stack(void); |
126 | static void main_bsp_separated_stack(void); |
126 | #ifdef CONFIG_SMP |
127 | #ifdef CONFIG_SMP |
127 | static void main_ap_separated_stack(void); |
128 | static void main_ap_separated_stack(void); |
128 | #endif |
129 | #endif |
129 | 130 | ||
130 | #define CONFIG_STACK_SIZE ((1 << STACK_FRAMES) * STACK_SIZE) |
131 | #define CONFIG_STACK_SIZE ((1 << STACK_FRAMES) * STACK_SIZE) |
131 | 132 | ||
132 | /** Main kernel routine for bootstrap CPU. |
133 | /** Main kernel routine for bootstrap CPU. |
133 | * |
134 | * |
134 | * Initializes the kernel by bootstrap CPU. |
135 | * Initializes the kernel by bootstrap CPU. |
135 | * This function passes control directly to |
136 | * This function passes control directly to |
136 | * main_bsp_separated_stack(). |
137 | * main_bsp_separated_stack(). |
137 | * |
138 | * |
138 | * Assuming interrupts_disable(). |
139 | * Assuming interrupts_disable(). |
139 | * |
140 | * |
140 | */ |
141 | */ |
141 | void main_bsp(void) |
142 | void main_bsp(void) |
142 | { |
143 | { |
143 | config.cpu_count = 1; |
144 | config.cpu_count = 1; |
144 | config.cpu_active = 1; |
145 | config.cpu_active = 1; |
145 | 146 | ||
146 | config.base = hardcoded_load_address; |
147 | config.base = hardcoded_load_address; |
147 | config.memory_size = get_memory_size(); |
148 | config.memory_size = get_memory_size(); |
148 | 149 | ||
149 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + |
150 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + |
150 | hardcoded_kdata_size, PAGE_SIZE); |
151 | hardcoded_kdata_size, PAGE_SIZE); |
151 | config.stack_size = CONFIG_STACK_SIZE; |
152 | config.stack_size = CONFIG_STACK_SIZE; |
152 | 153 | ||
153 | /* Initialy the stack is placed just after the kernel */ |
154 | /* Initialy the stack is placed just after the kernel */ |
154 | config.stack_base = config.base + config.kernel_size; |
155 | config.stack_base = config.base + config.kernel_size; |
155 | 156 | ||
156 | /* Avoid placing stack on top of init */ |
157 | /* Avoid placing stack on top of init */ |
157 | count_t i; |
158 | count_t i; |
158 | for (i = 0; i < init.cnt; i++) { |
159 | for (i = 0; i < init.cnt; i++) { |
159 | if (PA_overlaps(config.stack_base, config.stack_size, |
160 | if (PA_overlaps(config.stack_base, config.stack_size, |
160 | init.tasks[i].addr, init.tasks[i].size)) |
161 | init.tasks[i].addr, init.tasks[i].size)) |
161 | config.stack_base = ALIGN_UP(init.tasks[i].addr + |
162 | config.stack_base = ALIGN_UP(init.tasks[i].addr + |
162 | init.tasks[i].size, config.stack_size); |
163 | init.tasks[i].size, config.stack_size); |
163 | } |
164 | } |
164 | 165 | ||
165 | /* Avoid placing stack on top of boot allocations. */ |
166 | /* Avoid placing stack on top of boot allocations. */ |
166 | if (ballocs.size) { |
167 | if (ballocs.size) { |
167 | if (PA_overlaps(config.stack_base, config.stack_size, |
168 | if (PA_overlaps(config.stack_base, config.stack_size, |
168 | ballocs.base, ballocs.size)) |
169 | ballocs.base, ballocs.size)) |
169 | config.stack_base = ALIGN_UP(ballocs.base + |
170 | config.stack_base = ALIGN_UP(ballocs.base + |
170 | ballocs.size, PAGE_SIZE); |
171 | ballocs.size, PAGE_SIZE); |
171 | } |
172 | } |
172 | 173 | ||
173 | if (config.stack_base < stack_safe) |
174 | if (config.stack_base < stack_safe) |
174 | config.stack_base = ALIGN_UP(stack_safe, PAGE_SIZE); |
175 | config.stack_base = ALIGN_UP(stack_safe, PAGE_SIZE); |
175 | 176 | ||
176 | context_save(&ctx); |
177 | context_save(&ctx); |
177 | context_set(&ctx, FADDR(main_bsp_separated_stack), config.stack_base, |
178 | context_set(&ctx, FADDR(main_bsp_separated_stack), config.stack_base, |
178 | THREAD_STACK_SIZE); |
179 | THREAD_STACK_SIZE); |
179 | context_restore(&ctx); |
180 | context_restore(&ctx); |
180 | /* not reached */ |
181 | /* not reached */ |
181 | } |
182 | } |
182 | 183 | ||
183 | 184 | ||
184 | /** Main kernel routine for bootstrap CPU using new stack. |
185 | /** Main kernel routine for bootstrap CPU using new stack. |
185 | * |
186 | * |
186 | * Second part of main_bsp(). |
187 | * Second part of main_bsp(). |
187 | * |
188 | * |
188 | */ |
189 | */ |
189 | void main_bsp_separated_stack(void) |
190 | void main_bsp_separated_stack(void) |
190 | { |
191 | { |
191 | task_t *k; |
192 | task_t *k; |
192 | thread_t *t; |
193 | thread_t *t; |
193 | count_t i; |
194 | count_t i; |
194 | 195 | ||
195 | the_initialize(THE); |
196 | the_initialize(THE); |
196 | 197 | ||
197 | /* |
198 | /* |
198 | * kconsole data structures must be initialized very early |
199 | * kconsole data structures must be initialized very early |
199 | * because other subsystems will register their respective |
200 | * because other subsystems will register their respective |
200 | * commands. |
201 | * commands. |
201 | */ |
202 | */ |
202 | kconsole_init(); |
203 | kconsole_init(); |
203 | 204 | ||
204 | /* |
205 | /* |
205 | * Exception handler initialization, before architecture |
206 | * Exception handler initialization, before architecture |
206 | * starts adding its own handlers |
207 | * starts adding its own handlers |
207 | */ |
208 | */ |
208 | exc_init(); |
209 | exc_init(); |
209 | 210 | ||
210 | /* |
211 | /* |
211 | * Memory management subsystems initialization. |
212 | * Memory management subsystems initialization. |
212 | */ |
213 | */ |
213 | arch_pre_mm_init(); |
214 | arch_pre_mm_init(); |
214 | frame_init(); |
215 | frame_init(); |
215 | /* Initialize at least 1 memory segment big enough for slab to work. */ |
216 | /* Initialize at least 1 memory segment big enough for slab to work. */ |
216 | slab_cache_init(); |
217 | slab_cache_init(); |
217 | btree_init(); |
218 | btree_init(); |
218 | as_init(); |
219 | as_init(); |
219 | page_init(); |
220 | page_init(); |
220 | tlb_init(); |
221 | tlb_init(); |
221 | ddi_init(); |
222 | ddi_init(); |
222 | tasklet_init(); |
223 | tasklet_init(); |
223 | arch_post_mm_init(); |
224 | arch_post_mm_init(); |
224 | 225 | ||
225 | version_print(); |
226 | version_print(); |
226 | printf("kernel: %.*p hardcoded_ktext_size=%zdK, " |
227 | printf("kernel: %.*p hardcoded_ktext_size=%zdK, " |
227 | "hardcoded_kdata_size=%zdK\n", sizeof(uintptr_t) * 2, |
228 | "hardcoded_kdata_size=%zdK\n", sizeof(uintptr_t) * 2, |
228 | config.base, hardcoded_ktext_size >> 10, |
229 | config.base, hardcoded_ktext_size >> 10, |
229 | hardcoded_kdata_size >> 10); |
230 | hardcoded_kdata_size >> 10); |
230 | printf("stack: %.*p size=%zdK\n", sizeof(uintptr_t) * 2, |
231 | printf("stack: %.*p size=%zdK\n", sizeof(uintptr_t) * 2, |
231 | config.stack_base, config.stack_size >> 10); |
232 | config.stack_base, config.stack_size >> 10); |
232 | 233 | ||
233 | arch_pre_smp_init(); |
234 | arch_pre_smp_init(); |
234 | smp_init(); |
235 | smp_init(); |
235 | /* Slab must be initialized after we know the number of processors. */ |
236 | /* Slab must be initialized after we know the number of processors. */ |
236 | slab_enable_cpucache(); |
237 | slab_enable_cpucache(); |
237 | 238 | ||
238 | printf("config.memory_size=%zdM\n", config.memory_size >> 20); |
239 | printf("config.memory_size=%zdM\n", config.memory_size >> 20); |
239 | printf("config.cpu_count=%zd\n", config.cpu_count); |
240 | printf("config.cpu_count=%zd\n", config.cpu_count); |
240 | cpu_init(); |
241 | cpu_init(); |
241 | 242 | ||
242 | calibrate_delay_loop(); |
243 | calibrate_delay_loop(); |
243 | clock_counter_init(); |
244 | clock_counter_init(); |
244 | timeout_init(); |
245 | timeout_init(); |
245 | scheduler_init(); |
246 | scheduler_init(); |
246 | task_init(); |
247 | task_init(); |
247 | thread_init(); |
248 | thread_init(); |
248 | futex_init(); |
249 | futex_init(); |
249 | klog_init(); |
250 | klog_init(); |
250 | 251 | ||
251 | if (init.cnt > 0) { |
252 | if (init.cnt > 0) { |
252 | for (i = 0; i < init.cnt; i++) |
253 | for (i = 0; i < init.cnt; i++) |
253 | printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, |
254 | printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, |
254 | sizeof(uintptr_t) * 2, init.tasks[i].addr, i, |
255 | sizeof(uintptr_t) * 2, init.tasks[i].addr, i, |
255 | init.tasks[i].size); |
256 | init.tasks[i].size); |
256 | } else |
257 | } else |
257 | printf("No init binaries found\n"); |
258 | printf("No init binaries found\n"); |
258 | 259 | ||
259 | ipc_init(); |
260 | ipc_init(); |
260 | 261 | ||
261 | /* |
262 | /* |
262 | * Create kernel task. |
263 | * Create kernel task. |
263 | */ |
264 | */ |
264 | k = task_create(AS_KERNEL, "kernel"); |
265 | k = task_create(AS_KERNEL, "kernel"); |
265 | if (!k) |
266 | if (!k) |
266 | panic("can't create kernel task\n"); |
267 | panic("can't create kernel task\n"); |
267 | 268 | ||
268 | /* |
269 | /* |
269 | * Create the first thread. |
270 | * Create the first thread. |
270 | */ |
271 | */ |
271 | t = thread_create(kinit, NULL, k, 0, "kinit", true); |
272 | t = thread_create(kinit, NULL, k, 0, "kinit", true); |
272 | if (!t) |
273 | if (!t) |
273 | panic("can't create kinit thread\n"); |
274 | panic("can't create kinit thread\n"); |
274 | thread_ready(t); |
275 | thread_ready(t); |
275 | 276 | ||
276 | tasklet_run_tasklet_thread(k); |
277 | tasklet_run_tasklet_thread(k); |
277 | 278 | ||
- | 279 | rcu_init(); |
|
- | 280 | ||
278 | /* |
281 | /* |
279 | * This call to scheduler() will return to kinit, |
282 | * This call to scheduler() will return to kinit, |
280 | * starting the thread of kernel threads. |
283 | * starting the thread of kernel threads. |
281 | */ |
284 | */ |
282 | scheduler(); |
285 | scheduler(); |
283 | /* not reached */ |
286 | /* not reached */ |
284 | } |
287 | } |
285 | 288 | ||
286 | 289 | ||
287 | #ifdef CONFIG_SMP |
290 | #ifdef CONFIG_SMP |
288 | /** Main kernel routine for application CPUs. |
291 | /** Main kernel routine for application CPUs. |
289 | * |
292 | * |
290 | * Executed by application processors, temporary stack |
293 | * Executed by application processors, temporary stack |
291 | * is at ctx.sp which was set during BSP boot. |
294 | * is at ctx.sp which was set during BSP boot. |
292 | * This function passes control directly to |
295 | * This function passes control directly to |
293 | * main_ap_separated_stack(). |
296 | * main_ap_separated_stack(). |
294 | * |
297 | * |
295 | * Assuming interrupts_disable()'d. |
298 | * Assuming interrupts_disable()'d. |
296 | * |
299 | * |
297 | */ |
300 | */ |
298 | void main_ap(void) |
301 | void main_ap(void) |
299 | { |
302 | { |
300 | /* |
303 | /* |
301 | * Incrementing the active CPU counter will guarantee that the |
304 | * Incrementing the active CPU counter will guarantee that the |
302 | * *_init() functions can find out that they need to |
305 | * *_init() functions can find out that they need to |
303 | * do initialization for AP only. |
306 | * do initialization for AP only. |
304 | */ |
307 | */ |
305 | config.cpu_active++; |
308 | config.cpu_active++; |
306 | 309 | ||
307 | /* |
310 | /* |
308 | * The THE structure is well defined because ctx.sp is used as stack. |
311 | * The THE structure is well defined because ctx.sp is used as stack. |
309 | */ |
312 | */ |
310 | the_initialize(THE); |
313 | the_initialize(THE); |
311 | 314 | ||
312 | arch_pre_mm_init(); |
315 | arch_pre_mm_init(); |
313 | frame_init(); |
316 | frame_init(); |
314 | page_init(); |
317 | page_init(); |
315 | tlb_init(); |
318 | tlb_init(); |
316 | arch_post_mm_init(); |
319 | arch_post_mm_init(); |
317 | 320 | ||
318 | cpu_init(); |
321 | cpu_init(); |
319 | calibrate_delay_loop(); |
322 | calibrate_delay_loop(); |
320 | arch_post_cpu_init(); |
323 | arch_post_cpu_init(); |
321 | 324 | ||
322 | the_copy(THE, (the_t *) CPU->stack); |
325 | the_copy(THE, (the_t *) CPU->stack); |
323 | 326 | ||
324 | /* |
327 | /* |
325 | * If we woke kmp up before we left the kernel stack, we could |
328 | * If we woke kmp up before we left the kernel stack, we could |
326 | * collide with another CPU coming up. To prevent this, we |
329 | * collide with another CPU coming up. To prevent this, we |
327 | * switch to this cpu's private stack prior to waking kmp up. |
330 | * switch to this cpu's private stack prior to waking kmp up. |
328 | */ |
331 | */ |
329 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), |
332 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), |
330 | (uintptr_t) CPU->stack, CPU_STACK_SIZE); |
333 | (uintptr_t) CPU->stack, CPU_STACK_SIZE); |
331 | context_restore(&CPU->saved_context); |
334 | context_restore(&CPU->saved_context); |
332 | /* not reached */ |
335 | /* not reached */ |
333 | } |
336 | } |
334 | 337 | ||
335 | 338 | ||
336 | /** Main kernel routine for application CPUs using new stack. |
339 | /** Main kernel routine for application CPUs using new stack. |
337 | * |
340 | * |
338 | * Second part of main_ap(). |
341 | * Second part of main_ap(). |
339 | * |
342 | * |
340 | */ |
343 | */ |
341 | void main_ap_separated_stack(void) |
344 | void main_ap_separated_stack(void) |
342 | { |
345 | { |
343 | /* |
346 | /* |
344 | * Configure timeouts for this cpu. |
347 | * Configure timeouts for this cpu. |
345 | */ |
348 | */ |
346 | timeout_init(); |
349 | timeout_init(); |
347 | 350 | ||
348 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
351 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
349 | scheduler(); |
352 | scheduler(); |
350 | /* not reached */ |
353 | /* not reached */ |
351 | } |
354 | } |
352 | #endif /* CONFIG_SMP */ |
355 | #endif /* CONFIG_SMP */ |
353 | 356 | ||
354 | /** @} |
357 | /** @} |
355 | */ |
358 | */ |
356 | 359 |