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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 <synch/futex.h> |
53 | #include <synch/futex.h> |
54 | #include <arch/arch.h> |
54 | #include <arch/arch.h> |
55 | #include <arch.h> |
55 | #include <arch.h> |
56 | #include <arch/faddr.h> |
56 | #include <arch/faddr.h> |
57 | #include <typedefs.h> |
57 | #include <typedefs.h> |
58 | #include <ipc/ipc.h> |
58 | #include <ipc/ipc.h> |
59 | #include <macros.h> |
59 | #include <macros.h> |
60 | #include <adt/btree.h> |
60 | #include <adt/btree.h> |
61 | 61 | ||
62 | #ifdef CONFIG_SMP |
62 | #ifdef CONFIG_SMP |
63 | #include <arch/smp/apic.h> |
63 | #include <arch/smp/apic.h> |
64 | #include <arch/smp/mps.h> |
64 | #include <arch/smp/mps.h> |
65 | #endif /* CONFIG_SMP */ |
65 | #endif /* CONFIG_SMP */ |
66 | #include <smp/smp.h> |
66 | #include <smp/smp.h> |
67 | 67 | ||
68 | config_t config; /**< Global configuration structure. */ |
68 | config_t config; /**< Global configuration structure. */ |
69 | init_t init = {0}; /**< Initial user-space tasks */ |
69 | init_t init = {0}; /**< Initial user-space tasks */ |
70 | 70 | ||
71 | context_t ctx; |
71 | context_t ctx; |
72 | 72 | ||
73 | /** |
73 | /** |
74 | * These 'hardcoded' variables will be intialized by |
74 | * These 'hardcoded' variables will be intialized by |
75 | * the linker or the low level assembler code with |
75 | * the linker or the low level assembler code with |
76 | * appropriate sizes and addresses. |
76 | * appropriate sizes and addresses. |
77 | */ |
77 | */ |
78 | __address hardcoded_load_address = 0; |
78 | __address hardcoded_load_address = 0; |
79 | size_t hardcoded_ktext_size = 0; |
79 | size_t hardcoded_ktext_size = 0; |
80 | size_t hardcoded_kdata_size = 0; |
80 | size_t hardcoded_kdata_size = 0; |
81 | 81 | ||
82 | void main_bsp(void); |
82 | void main_bsp(void); |
83 | void main_ap(void); |
83 | void main_ap(void); |
84 | 84 | ||
85 | /* |
85 | /* |
86 | * These two functions prevent stack from underflowing during the |
86 | * These two functions prevent stack from underflowing during the |
87 | * kernel boot phase when SP is set to the very top of the reserved |
87 | * kernel boot phase when SP is set to the very top of the reserved |
88 | * space. The stack could get corrupted by a fooled compiler-generated |
88 | * space. The stack could get corrupted by a fooled compiler-generated |
89 | * pop sequence otherwise. |
89 | * pop sequence otherwise. |
90 | */ |
90 | */ |
91 | static void main_bsp_separated_stack(void); |
91 | static void main_bsp_separated_stack(void); |
92 | #ifdef CONFIG_SMP |
92 | #ifdef CONFIG_SMP |
93 | static void main_ap_separated_stack(void); |
93 | static void main_ap_separated_stack(void); |
94 | #endif |
94 | #endif |
95 | 95 | ||
96 | #define CONFIG_STACK_SIZE ((1<<STACK_FRAMES)*STACK_SIZE) |
96 | #define CONFIG_STACK_SIZE ((1<<STACK_FRAMES)*STACK_SIZE) |
97 | 97 | ||
98 | /** Bootstrap CPU main kernel routine |
98 | /** Bootstrap CPU main kernel routine |
99 | * |
99 | * |
100 | * Initializes the kernel by bootstrap CPU. |
100 | * Initializes the kernel by bootstrap CPU. |
101 | * This function passes control directly to |
101 | * This function passes control directly to |
102 | * main_bsp_separated_stack(). |
102 | * main_bsp_separated_stack(). |
103 | * |
103 | * |
104 | * Assuming interrupts_disable(). |
104 | * Assuming interrupts_disable(). |
105 | * |
105 | * |
106 | */ |
106 | */ |
107 | void main_bsp(void) |
107 | void main_bsp(void) |
108 | { |
108 | { |
109 | __address stackaddr; |
109 | __address stackaddr; |
110 | 110 | ||
111 | config.cpu_count = 1; |
111 | config.cpu_count = 1; |
112 | config.cpu_active = 1; |
112 | config.cpu_active = 1; |
113 | 113 | ||
114 | config.base = hardcoded_load_address; |
114 | config.base = hardcoded_load_address; |
115 | config.memory_size = get_memory_size(); |
115 | config.memory_size = get_memory_size(); |
116 | 116 | ||
117 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
117 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
118 | stackaddr = config.base + config.kernel_size; |
118 | stackaddr = config.base + config.kernel_size; |
119 | 119 | ||
120 | /* Avoid placing kernel on top of init */ |
120 | /* Avoid placing kernel on top of init */ |
121 | count_t i; |
121 | count_t i; |
122 | bool overlap = false; |
122 | bool overlap = false; |
123 | for (i = 0; i < init.cnt; i++) |
123 | for (i = 0; i < init.cnt; i++) |
124 | if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) { |
124 | if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) { |
125 | stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE); |
125 | stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE); |
126 | init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
126 | init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
127 | overlap = true; |
127 | overlap = true; |
128 | } |
128 | } |
129 | 129 | ||
130 | if (!overlap) |
130 | if (!overlap) |
131 | config.kernel_size += CONFIG_STACK_SIZE; |
131 | config.kernel_size += CONFIG_STACK_SIZE; |
132 | 132 | ||
133 | context_save(&ctx); |
133 | context_save(&ctx); |
134 | context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE); |
134 | context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE); |
135 | context_restore(&ctx); |
135 | context_restore(&ctx); |
136 | /* not reached */ |
136 | /* not reached */ |
137 | } |
137 | } |
138 | 138 | ||
139 | 139 | ||
140 | /** Bootstrap CPU main kernel routine stack wrapper |
140 | /** Bootstrap CPU main kernel routine stack wrapper |
141 | * |
141 | * |
142 | * Second part of main_bsp(). |
142 | * Second part of main_bsp(). |
143 | * |
143 | * |
144 | */ |
144 | */ |
145 | void main_bsp_separated_stack(void) |
145 | void main_bsp_separated_stack(void) |
146 | { |
146 | { |
147 | task_t *k; |
147 | task_t *k; |
148 | thread_t *t; |
148 | thread_t *t; |
149 | count_t i; |
149 | count_t i; |
150 | 150 | ||
151 | the_initialize(THE); |
151 | the_initialize(THE); |
152 | 152 | ||
153 | /* |
153 | /* |
154 | * kconsole data structures must be initialized very early |
154 | * kconsole data structures must be initialized very early |
155 | * because other subsystems will register their respective |
155 | * because other subsystems will register their respective |
156 | * commands. |
156 | * commands. |
157 | */ |
157 | */ |
158 | kconsole_init(); |
158 | kconsole_init(); |
159 | 159 | ||
160 | /* |
160 | /* |
161 | * Exception handler initialization, before architecture |
161 | * Exception handler initialization, before architecture |
162 | * starts adding its own handlers |
162 | * starts adding its own handlers |
163 | */ |
163 | */ |
164 | exc_init(); |
164 | exc_init(); |
165 | 165 | ||
166 | /* |
166 | /* |
167 | * Memory management subsystems initialization. |
167 | * Memory management subsystems initialization. |
168 | */ |
168 | */ |
169 | arch_pre_mm_init(); |
169 | arch_pre_mm_init(); |
170 | frame_init(); /* Initialize at least 1 memory segment big enough for slab to work */ |
170 | frame_init(); /* Initialize at least 1 memory segment big enough for slab to work */ |
171 | slab_cache_init(); |
171 | slab_cache_init(); |
172 | btree_init(); |
172 | btree_init(); |
173 | as_init(); |
173 | as_init(); |
174 | page_init(); |
174 | page_init(); |
175 | tlb_init(); |
175 | tlb_init(); |
176 | arch_post_mm_init(); |
176 | arch_post_mm_init(); |
177 | 177 | ||
178 | version_print(); |
178 | version_print(); |
179 | printf("%#zx: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", config.base, hardcoded_ktext_size / 1024, hardcoded_kdata_size / 1024); |
179 | printf("%.*p: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(__address) * 2, config.base, hardcoded_ktext_size / 1024, hardcoded_kdata_size / 1024); |
180 | 180 | ||
181 | arch_pre_smp_init(); |
181 | arch_pre_smp_init(); |
182 | smp_init(); |
182 | smp_init(); |
183 | 183 | ||
184 | slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */ |
184 | slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */ |
185 | 185 | ||
186 | printf("config.memory_size=%zdM\n", config.memory_size/(1024*1024)); |
186 | printf("config.memory_size=%zdM\n", config.memory_size/(1024*1024)); |
187 | printf("config.cpu_count=%zd\n", config.cpu_count); |
187 | printf("config.cpu_count=%zd\n", config.cpu_count); |
188 | cpu_init(); |
188 | cpu_init(); |
189 | 189 | ||
190 | calibrate_delay_loop(); |
190 | calibrate_delay_loop(); |
191 | timeout_init(); |
191 | timeout_init(); |
192 | scheduler_init(); |
192 | scheduler_init(); |
193 | task_init(); |
193 | task_init(); |
194 | thread_init(); |
194 | thread_init(); |
195 | futex_init(); |
195 | futex_init(); |
196 | 196 | ||
197 | for (i = 0; i < init.cnt; i++) |
197 | for (i = 0; i < init.cnt; i++) |
198 | printf("init[%zd].addr=%p, init[%zd].size=%zd\n", i, init.tasks[i].addr, i, init.tasks[i].size); |
198 | printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, sizeof(__address)*2, init.tasks[i].addr, i, init.tasks[i].size); |
199 | 199 | ||
200 | ipc_init(); |
200 | ipc_init(); |
201 | 201 | ||
202 | /* |
202 | /* |
203 | * Create kernel task. |
203 | * Create kernel task. |
204 | */ |
204 | */ |
205 | k = task_create(AS_KERNEL, "KERNEL"); |
205 | k = task_create(AS_KERNEL, "KERNEL"); |
206 | if (!k) |
206 | if (!k) |
207 | panic("can't create kernel task\n"); |
207 | panic("can't create kernel task\n"); |
208 | 208 | ||
209 | /* |
209 | /* |
210 | * Create the first thread. |
210 | * Create the first thread. |
211 | */ |
211 | */ |
212 | t = thread_create(kinit, NULL, k, 0, "kinit"); |
212 | t = thread_create(kinit, NULL, k, 0, "kinit"); |
213 | if (!t) |
213 | if (!t) |
214 | panic("can't create kinit thread\n"); |
214 | panic("can't create kinit thread\n"); |
215 | thread_ready(t); |
215 | thread_ready(t); |
216 | 216 | ||
217 | /* |
217 | /* |
218 | * This call to scheduler() will return to kinit, |
218 | * This call to scheduler() will return to kinit, |
219 | * starting the thread of kernel threads. |
219 | * starting the thread of kernel threads. |
220 | */ |
220 | */ |
221 | scheduler(); |
221 | scheduler(); |
222 | /* not reached */ |
222 | /* not reached */ |
223 | } |
223 | } |
224 | 224 | ||
225 | 225 | ||
226 | #ifdef CONFIG_SMP |
226 | #ifdef CONFIG_SMP |
227 | /** Application CPUs main kernel routine |
227 | /** Application CPUs main kernel routine |
228 | * |
228 | * |
229 | * Executed by application processors, temporary stack |
229 | * Executed by application processors, temporary stack |
230 | * is at ctx.sp which was set during BP boot. |
230 | * is at ctx.sp which was set during BP boot. |
231 | * This function passes control directly to |
231 | * This function passes control directly to |
232 | * main_ap_separated_stack(). |
232 | * main_ap_separated_stack(). |
233 | * |
233 | * |
234 | * Assuming interrupts_disable()'d. |
234 | * Assuming interrupts_disable()'d. |
235 | * |
235 | * |
236 | */ |
236 | */ |
237 | void main_ap(void) |
237 | void main_ap(void) |
238 | { |
238 | { |
239 | /* |
239 | /* |
240 | * Incrementing the active CPU counter will guarantee that the |
240 | * Incrementing the active CPU counter will guarantee that the |
241 | * pm_init() will not attempt to build GDT and IDT tables again. |
241 | * pm_init() will not attempt to build GDT and IDT tables again. |
242 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
242 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
243 | * will do. |
243 | * will do. |
244 | */ |
244 | */ |
245 | config.cpu_active++; |
245 | config.cpu_active++; |
246 | 246 | ||
247 | /* |
247 | /* |
248 | * The THE structure is well defined because ctx.sp is used as stack. |
248 | * The THE structure is well defined because ctx.sp is used as stack. |
249 | */ |
249 | */ |
250 | the_initialize(THE); |
250 | the_initialize(THE); |
251 | 251 | ||
252 | arch_pre_mm_init(); |
252 | arch_pre_mm_init(); |
253 | frame_init(); |
253 | frame_init(); |
254 | page_init(); |
254 | page_init(); |
255 | tlb_init(); |
255 | tlb_init(); |
256 | arch_post_mm_init(); |
256 | arch_post_mm_init(); |
257 | 257 | ||
258 | cpu_init(); |
258 | cpu_init(); |
259 | 259 | ||
260 | calibrate_delay_loop(); |
260 | calibrate_delay_loop(); |
261 | 261 | ||
262 | l_apic_init(); |
262 | l_apic_init(); |
263 | l_apic_debug(); |
263 | l_apic_debug(); |
264 | 264 | ||
265 | the_copy(THE, (the_t *) CPU->stack); |
265 | the_copy(THE, (the_t *) CPU->stack); |
266 | 266 | ||
267 | /* |
267 | /* |
268 | * If we woke kmp up before we left the kernel stack, we could |
268 | * If we woke kmp up before we left the kernel stack, we could |
269 | * collide with another CPU coming up. To prevent this, we |
269 | * collide with another CPU coming up. To prevent this, we |
270 | * switch to this cpu's private stack prior to waking kmp up. |
270 | * switch to this cpu's private stack prior to waking kmp up. |
271 | */ |
271 | */ |
272 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
272 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
273 | context_restore(&CPU->saved_context); |
273 | context_restore(&CPU->saved_context); |
274 | /* not reached */ |
274 | /* not reached */ |
275 | } |
275 | } |
276 | 276 | ||
277 | 277 | ||
278 | /** Application CPUs main kernel routine stack wrapper |
278 | /** Application CPUs main kernel routine stack wrapper |
279 | * |
279 | * |
280 | * Second part of main_ap(). |
280 | * Second part of main_ap(). |
281 | * |
281 | * |
282 | */ |
282 | */ |
283 | void main_ap_separated_stack(void) |
283 | void main_ap_separated_stack(void) |
284 | { |
284 | { |
285 | /* |
285 | /* |
286 | * Configure timeouts for this cpu. |
286 | * Configure timeouts for this cpu. |
287 | */ |
287 | */ |
288 | timeout_init(); |
288 | timeout_init(); |
289 | 289 | ||
290 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
290 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
291 | scheduler(); |
291 | scheduler(); |
292 | /* not reached */ |
292 | /* not reached */ |
293 | } |
293 | } |
294 | #endif /* CONFIG_SMP */ |
294 | #endif /* CONFIG_SMP */ |
295 | 295 |