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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 | #include <arch/asm.h> |
29 | #include <arch/asm.h> |
30 | #include <context.h> |
30 | #include <context.h> |
31 | #include <print.h> |
31 | #include <print.h> |
32 | #include <panic.h> |
32 | #include <panic.h> |
33 | #include <debug.h> |
33 | #include <debug.h> |
34 | #include <config.h> |
34 | #include <config.h> |
35 | #include <time/clock.h> |
35 | #include <time/clock.h> |
36 | #include <proc/scheduler.h> |
36 | #include <proc/scheduler.h> |
37 | #include <proc/thread.h> |
37 | #include <proc/thread.h> |
38 | #include <proc/task.h> |
38 | #include <proc/task.h> |
39 | #include <main/kinit.h> |
39 | #include <main/kinit.h> |
40 | #include <main/version.h> |
40 | #include <main/version.h> |
41 | #include <console/kconsole.h> |
41 | #include <console/kconsole.h> |
42 | #include <cpu.h> |
42 | #include <cpu.h> |
43 | #include <align.h> |
43 | #include <align.h> |
44 | #include <interrupt.h> |
44 | #include <interrupt.h> |
45 | #include <arch/mm/memory_init.h> |
45 | #include <arch/mm/memory_init.h> |
46 | #include <mm/frame.h> |
46 | #include <mm/frame.h> |
47 | #include <mm/page.h> |
47 | #include <mm/page.h> |
48 | #include <genarch/mm/page_pt.h> |
48 | #include <genarch/mm/page_pt.h> |
49 | #include <mm/tlb.h> |
49 | #include <mm/tlb.h> |
50 | #include <mm/as.h> |
50 | #include <mm/as.h> |
51 | #include <mm/slab.h> |
51 | #include <mm/slab.h> |
52 | #include <synch/waitq.h> |
52 | #include <synch/waitq.h> |
53 | #include <arch/arch.h> |
53 | #include <arch/arch.h> |
54 | #include <arch.h> |
54 | #include <arch.h> |
55 | #include <arch/faddr.h> |
55 | #include <arch/faddr.h> |
56 | #include <typedefs.h> |
56 | #include <typedefs.h> |
57 | #include <ipc/ipc.h> |
57 | #include <ipc/ipc.h> |
58 | 58 | ||
59 | #ifdef CONFIG_SMP |
59 | #ifdef CONFIG_SMP |
60 | #include <arch/smp/apic.h> |
60 | #include <arch/smp/apic.h> |
61 | #include <arch/smp/mps.h> |
61 | #include <arch/smp/mps.h> |
62 | #endif /* CONFIG_SMP */ |
62 | #endif /* CONFIG_SMP */ |
63 | #include <smp/smp.h> |
63 | #include <smp/smp.h> |
64 | 64 | ||
65 | config_t config; /**< Global configuration structure. */ |
65 | config_t config; /**< Global configuration structure. */ |
66 | init_t init = {0}; /**< Initial user-space tasks */ |
66 | init_t init = {0}; /**< Initial user-space tasks */ |
67 | 67 | ||
68 | context_t ctx; |
68 | context_t ctx; |
69 | 69 | ||
70 | /** |
70 | /** |
71 | * These 'hardcoded' variables will be intialized by |
71 | * These 'hardcoded' variables will be intialized by |
72 | * the linker or the low level assembler code with |
72 | * the linker or the low level assembler code with |
73 | * appropriate sizes and addresses. |
73 | * appropriate sizes and addresses. |
74 | */ |
74 | */ |
75 | __address hardcoded_load_address = 0; |
75 | __address hardcoded_load_address = 0; |
76 | size_t hardcoded_ktext_size = 0; |
76 | size_t hardcoded_ktext_size = 0; |
77 | size_t hardcoded_kdata_size = 0; |
77 | size_t hardcoded_kdata_size = 0; |
78 | 78 | ||
79 | void main_bsp(void); |
79 | void main_bsp(void); |
80 | void main_ap(void); |
80 | void main_ap(void); |
81 | 81 | ||
82 | /* |
82 | /* |
83 | * These two functions prevent stack from underflowing during the |
83 | * These two functions prevent stack from underflowing during the |
84 | * kernel boot phase when SP is set to the very top of the reserved |
84 | * kernel boot phase when SP is set to the very top of the reserved |
85 | * space. The stack could get corrupted by a fooled compiler-generated |
85 | * space. The stack could get corrupted by a fooled compiler-generated |
86 | * pop sequence otherwise. |
86 | * pop sequence otherwise. |
87 | */ |
87 | */ |
88 | static void main_bsp_separated_stack(void); |
88 | static void main_bsp_separated_stack(void); |
89 | #ifdef CONFIG_SMP |
89 | #ifdef CONFIG_SMP |
90 | static void main_ap_separated_stack(void); |
90 | static void main_ap_separated_stack(void); |
91 | #endif |
91 | #endif |
92 | 92 | ||
93 | /** Bootstrap CPU main kernel routine |
93 | /** Bootstrap CPU main kernel routine |
94 | * |
94 | * |
95 | * Initializes the kernel by bootstrap CPU. |
95 | * Initializes the kernel by bootstrap CPU. |
96 | * This function passes control directly to |
96 | * This function passes control directly to |
97 | * main_bsp_separated_stack(). |
97 | * main_bsp_separated_stack(). |
98 | * |
98 | * |
99 | * Assuming interrupts_disable(). |
99 | * Assuming interrupts_disable(). |
100 | * |
100 | * |
101 | */ |
101 | */ |
102 | void main_bsp(void) |
102 | void main_bsp(void) |
103 | { |
103 | { |
104 | __address stackaddr; |
104 | __address stackaddr; |
105 | 105 | ||
106 | config.cpu_count = 1; |
106 | config.cpu_count = 1; |
107 | config.cpu_active = 1; |
107 | config.cpu_active = 1; |
108 | 108 | ||
109 | config.base = hardcoded_load_address; |
109 | config.base = hardcoded_load_address; |
110 | config.memory_size = get_memory_size(); |
110 | config.memory_size = get_memory_size(); |
111 | 111 | ||
112 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
112 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
113 | stackaddr = config.base + config.kernel_size; |
113 | stackaddr = config.base + config.kernel_size; |
114 | 114 | ||
115 | /* Avoid placing kernel on top of init */ |
115 | /* Avoid placing kernel on top of init */ |
116 | count_t i; |
116 | count_t i; |
117 | bool overlap = false; |
117 | bool overlap = false; |
118 | for (i = 0; i < init.cnt; i++) |
118 | for (i = 0; i < init.cnt; i++) |
119 | if (overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) { |
119 | if (overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) { |
120 | stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE); |
120 | stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE); |
121 | init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
121 | init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
122 | overlap = true; |
122 | overlap = true; |
123 | } |
123 | } |
124 | 124 | ||
125 | if (!overlap) |
125 | if (!overlap) |
126 | config.kernel_size += CONFIG_STACK_SIZE; |
126 | config.kernel_size += CONFIG_STACK_SIZE; |
127 | 127 | ||
128 | context_save(&ctx); |
128 | context_save(&ctx); |
129 | context_set(&ctx, FADDR(main_bsp_separated_stack), |
129 | context_set(&ctx, FADDR(main_bsp_separated_stack), |
130 | stackaddr, CONFIG_STACK_SIZE); |
130 | stackaddr, CONFIG_STACK_SIZE); |
131 | context_restore(&ctx); |
131 | context_restore(&ctx); |
132 | /* not reached */ |
132 | /* not reached */ |
133 | } |
133 | } |
134 | 134 | ||
135 | 135 | ||
136 | /** Bootstrap CPU main kernel routine stack wrapper |
136 | /** Bootstrap CPU main kernel routine stack wrapper |
137 | * |
137 | * |
138 | * Second part of main_bsp(). |
138 | * Second part of main_bsp(). |
139 | * |
139 | * |
140 | */ |
140 | */ |
141 | void main_bsp_separated_stack(void) |
141 | void main_bsp_separated_stack(void) |
142 | { |
142 | { |
143 | task_t *k; |
143 | task_t *k; |
144 | thread_t *t; |
144 | thread_t *t; |
145 | 145 | ||
146 | the_initialize(THE); |
146 | the_initialize(THE); |
147 | /* |
147 | /* |
148 | * kconsole data structures must be initialized very early |
148 | * kconsole data structures must be initialized very early |
149 | * because other subsystems will register their respective |
149 | * because other subsystems will register their respective |
150 | * commands. |
150 | * commands. |
151 | */ |
151 | */ |
152 | kconsole_init(); |
152 | kconsole_init(); |
153 | 153 | ||
154 | /* |
154 | /* |
155 | * Exception handler initialization, before architecture |
155 | * Exception handler initialization, before architecture |
156 | * starts adding its own handlers |
156 | * starts adding its own handlers |
157 | */ |
157 | */ |
158 | exc_init(); |
158 | exc_init(); |
159 | 159 | ||
160 | /* |
160 | /* |
161 | * Memory management subsystems initialization. |
161 | * Memory management subsystems initialization. |
162 | */ |
162 | */ |
163 | arch_pre_mm_init(); |
163 | arch_pre_mm_init(); |
164 | /* Initialize at least 1 memory segment big enough for slab to work */ |
164 | /* Initialize at least 1 memory segment big enough for slab to work */ |
165 | frame_init(); |
165 | frame_init(); |
166 | slab_cache_init(); |
166 | slab_cache_init(); |
167 | as_init(); |
167 | as_init(); |
168 | page_init(); |
168 | page_init(); |
169 | tlb_init(); |
169 | tlb_init(); |
170 | arch_post_mm_init(); |
170 | arch_post_mm_init(); |
171 | version_print(); |
171 | version_print(); |
172 | 172 | ||
173 | printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
173 | printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
174 | config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
174 | config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
175 | 175 | ||
176 | arch_pre_smp_init(); |
176 | arch_pre_smp_init(); |
177 | smp_init(); |
177 | smp_init(); |
178 | /* Slab must be initialized AFTER we know the number of processors */ |
178 | /* Slab must be initialized AFTER we know the number of processors */ |
179 | slab_enable_cpucache(); |
179 | slab_enable_cpucache(); |
180 | 180 | ||
181 | printf("config.memory_size=%dM\n", config.memory_size/(1024*1024)); |
181 | printf("config.memory_size=%dM\n", config.memory_size/(1024*1024)); |
182 | printf("config.cpu_count=%d\n", config.cpu_count); |
182 | printf("config.cpu_count=%d\n", config.cpu_count); |
183 | cpu_init(); |
183 | cpu_init(); |
184 | 184 | ||
185 | calibrate_delay_loop(); |
185 | calibrate_delay_loop(); |
186 | timeout_init(); |
186 | timeout_init(); |
187 | scheduler_init(); |
187 | scheduler_init(); |
188 | task_init(); |
188 | task_init(); |
189 | thread_init(); |
189 | thread_init(); |
190 | 190 | ||
191 | count_t i; |
191 | count_t i; |
192 | for (i = 0; i < init.cnt; i++) |
192 | for (i = 0; i < init.cnt; i++) |
193 | printf("init[%d].addr=%P, init[%d].size=%d\n", i, init.tasks[i].addr, i, init.tasks[i].size); |
193 | printf("init[%d].addr=%P, init[%d].size=%d\n", i, init.tasks[i].addr, i, init.tasks[i].size); |
194 | 194 | ||
195 | ipc_init(); |
195 | ipc_init(); |
196 | /* |
196 | /* |
197 | * Create kernel task. |
197 | * Create kernel task. |
198 | */ |
198 | */ |
199 | k = task_create(AS_KERNEL); |
199 | k = task_create(AS_KERNEL, "KERNEL"); |
200 | if (!k) |
200 | if (!k) |
201 | panic("can't create kernel task\n"); |
201 | panic("can't create kernel task\n"); |
202 | 202 | ||
203 | /* |
203 | /* |
204 | * Create the first thread. |
204 | * Create the first thread. |
205 | */ |
205 | */ |
206 | t = thread_create(kinit, NULL, k, 0); |
206 | t = thread_create(kinit, NULL, k, 0, "kinit"); |
207 | if (!t) |
207 | if (!t) |
208 | panic("can't create kinit thread\n"); |
208 | panic("can't create kinit thread\n"); |
209 | thread_ready(t); |
209 | thread_ready(t); |
210 | 210 | ||
211 | /* |
211 | /* |
212 | * This call to scheduler() will return to kinit, |
212 | * This call to scheduler() will return to kinit, |
213 | * starting the thread of kernel threads. |
213 | * starting the thread of kernel threads. |
214 | */ |
214 | */ |
215 | scheduler(); |
215 | scheduler(); |
216 | /* not reached */ |
216 | /* not reached */ |
217 | } |
217 | } |
218 | 218 | ||
219 | 219 | ||
220 | #ifdef CONFIG_SMP |
220 | #ifdef CONFIG_SMP |
221 | /** Application CPUs main kernel routine |
221 | /** Application CPUs main kernel routine |
222 | * |
222 | * |
223 | * Executed by application processors, temporary stack |
223 | * Executed by application processors, temporary stack |
224 | * is at ctx.sp which was set during BP boot. |
224 | * is at ctx.sp which was set during BP boot. |
225 | * This function passes control directly to |
225 | * This function passes control directly to |
226 | * main_ap_separated_stack(). |
226 | * main_ap_separated_stack(). |
227 | * |
227 | * |
228 | * Assuming interrupts_disable()'d. |
228 | * Assuming interrupts_disable()'d. |
229 | * |
229 | * |
230 | */ |
230 | */ |
231 | void main_ap(void) |
231 | void main_ap(void) |
232 | { |
232 | { |
233 | /* |
233 | /* |
234 | * Incrementing the active CPU counter will guarantee that the |
234 | * Incrementing the active CPU counter will guarantee that the |
235 | * pm_init() will not attempt to build GDT and IDT tables again. |
235 | * pm_init() will not attempt to build GDT and IDT tables again. |
236 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
236 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
237 | * will do. |
237 | * will do. |
238 | */ |
238 | */ |
239 | config.cpu_active++; |
239 | config.cpu_active++; |
240 | 240 | ||
241 | /* |
241 | /* |
242 | * The THE structure is well defined because ctx.sp is used as stack. |
242 | * The THE structure is well defined because ctx.sp is used as stack. |
243 | */ |
243 | */ |
244 | the_initialize(THE); |
244 | the_initialize(THE); |
245 | 245 | ||
246 | arch_pre_mm_init(); |
246 | arch_pre_mm_init(); |
247 | frame_init(); |
247 | frame_init(); |
248 | page_init(); |
248 | page_init(); |
249 | tlb_init(); |
249 | tlb_init(); |
250 | arch_post_mm_init(); |
250 | arch_post_mm_init(); |
251 | 251 | ||
252 | cpu_init(); |
252 | cpu_init(); |
253 | 253 | ||
254 | calibrate_delay_loop(); |
254 | calibrate_delay_loop(); |
255 | 255 | ||
256 | l_apic_init(); |
256 | l_apic_init(); |
257 | l_apic_debug(); |
257 | l_apic_debug(); |
258 | 258 | ||
259 | the_copy(THE, (the_t *) CPU->stack); |
259 | the_copy(THE, (the_t *) CPU->stack); |
260 | 260 | ||
261 | /* |
261 | /* |
262 | * If we woke kmp up before we left the kernel stack, we could |
262 | * If we woke kmp up before we left the kernel stack, we could |
263 | * collide with another CPU coming up. To prevent this, we |
263 | * collide with another CPU coming up. To prevent this, we |
264 | * switch to this cpu's private stack prior to waking kmp up. |
264 | * switch to this cpu's private stack prior to waking kmp up. |
265 | */ |
265 | */ |
266 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
266 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
267 | context_restore(&CPU->saved_context); |
267 | context_restore(&CPU->saved_context); |
268 | /* not reached */ |
268 | /* not reached */ |
269 | } |
269 | } |
270 | 270 | ||
271 | 271 | ||
272 | /** Application CPUs main kernel routine stack wrapper |
272 | /** Application CPUs main kernel routine stack wrapper |
273 | * |
273 | * |
274 | * Second part of main_ap(). |
274 | * Second part of main_ap(). |
275 | * |
275 | * |
276 | */ |
276 | */ |
277 | void main_ap_separated_stack(void) |
277 | void main_ap_separated_stack(void) |
278 | { |
278 | { |
279 | /* |
279 | /* |
280 | * Configure timeouts for this cpu. |
280 | * Configure timeouts for this cpu. |
281 | */ |
281 | */ |
282 | timeout_init(); |
282 | timeout_init(); |
283 | 283 | ||
284 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
284 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
285 | scheduler(); |
285 | scheduler(); |
286 | /* not reached */ |
286 | /* not reached */ |
287 | } |
287 | } |
288 | #endif /* CONFIG_SMP */ |
288 | #endif /* CONFIG_SMP */ |
289 | 289 |